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05-01-2012 дата публикации

Position measuring system and method for assembly

Номер: US20120000269A1
Автор: Markus Kühler, Wolfgang Pucher
Принадлежит: Dr Johannes Heidenhain GmbH

A method for mounting a substrate of a measurement graduation and a scanning head of a position measuring system on a first machine part and a second machine part. The method including fastening a substrate of a measurement graduation and a scanning head on first and second portions, respectively, of a mounting aid. The method including adjusting a location of the first portion relative to the second portion in a first degree of freedom that differs from a measurement direction in which a relative position of the first machine part relative to the second machine part is to be measured. The method including fastening the substrate and the scanning head on the first and second machine parts, respectively, at the mounting position. The method further including removing the mounting aid.

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Номер записи: 1
25-12-2017 дата публикации

Оптическая схема ультрапрецизионного голографического датчика линейных перемещений с блоком управляемых зеркал

Номер: RU0000175968U1
Автор: Александр Юрьевич Жердев, Владимир Васильевич Маркин, Владимир Евгеньевич Талалаев, Дмитрий Сергеевич Лушников, Сергей Борисович Одиноков
Принадлежит: федеральное государственное бюджетное образовательное учреждение высшего образования "Московский государственный технический университет имени Н.Э. Баумана (национальный исследовательский университет)" (МГТУ им. Н.Э. Баумана)

Оптическая схема ультрапрецизионного голографического датчика линейных перемещений включает в себя источники когерентного оптического излучения, коллимирующую систему, пропускающую дифракционную решетку, блок приемников, регистрирующие дифрагировавшие оптические пучки. Также устройство содержит блок зеркал, который делит сколлимированное излучение на несколько пучков по количеству зеркал в блоке. Количество зеркал равно количеству приемников излучения, каждое зеркало имеет возможность независимого изменения углового положения, за счет которого вносится фазовый сдвиг. Технический результат заключается в повышении точности датчика. 6 ил. Ц 1 175968 ко РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ 175 968 Ц4 $ < м А п РЦ ‘’ (50) МПК СОР 5/38 (2006.01) (12) ОПИСАНИЕ ПОЛЕЗНОЙ МОДЕЛИ К ПАТЕНТУ (52) СПК СО 5/38 (20/705) (21)(22) Заявка: 2017115349, 02.05.2017 (72) Автор(ы): (24) Дата начала отсчета срока действия патента: 02.05.2017 Дата регистрации: 25.12.2017 Приоритет(ь): (22) Дата подачи заявки: 02.05.2017 (45) Опубликовано: 25.12.2017 Бюл. № 36 Адрес для переписки: 105005, Москва, ул. 2-я Бауманская, 5, стр. 1, МГТУ им. Н.Э. Баумана, ЦЗИС, для Одинокова С.Б. (каф. РЛ-2) Одиноков Сергей Борисович (КО), Лушников Дмитрий Сергеевич (КО), Маркин Владимир Васильевич (КО), Жердев Александр Юрьевич (КО), Талалаев Владимир Евгеньевич (КО) (73) Патентообладатель(и): федеральное государственное бюджетное образовательное учреждение высшего образования "Московский государственный технический университет имени Н.Э. Баумана (национальный исследовательский университет)" (МГТУ им. Н.Э. Баумана) (КО) (56) Список документов, цитированных в отчете о поиске: КО 2400703 СТ, 27.09.2010. \О 2002023132 А1, 21.03.2002. 0$ 5569913 А, 29.10.1996. ]Р $ 63115010 А, 19.05.1988. (54) Оптическая схема ультрапрецизионного голографического датчика линейных перемещений с блоком управляемых зеркал (57) Реферат: Оптическая схема ультрапрецизионного голографического датчика ...

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Номер записи: 2
26-12-2017 дата публикации

Оптическая схема ультрапрецизионного голографического датчика линейных перемещений с управляемым фазовым модулятором

Номер: RU0000176011U1
Автор: Александр Юрьевич Жердев, Владимир Васильевич Маркин, Владимир Евгеньевич Талалаев, Дмитрий Сергеевич Лушников, Сергей Борисович Одиноков, Юрий Петрович Чугунов
Принадлежит: федеральное государственное бюджетное образовательное учреждение высшего образования &#34;Московский государственный технический университет имени Н.Э. Баумана (национальный исследовательский университет)&#34; (МГТУ им. Н.Э. Баумана)

Оптическая схема ультрапрецизионного голографического датчика линейных перемещений состоит из источника когерентного оптического излучения, коллимирующей системы, пропускающей дифракционной решетки, многосекционного фазового элемента, представляющего собой единый оптический элемент с несколькими зонами, изготовленными встык друг с другом с возможностью внесения этими зонами фазовых сдвигов в дифрагирующие оптические пучки, блока приемников указанных регистрируемых оптических сигналов. При этом многосекционный фазовый элемент выполнен в виде управляемого фазового модулятора с возможностью управляемого изменения фазовых сдвигов.Технический результат заключается в повышении точности датчика за счёт получения в реальном времени максимального приращения сигнала при минимальном изменении контролируемого параметра. 7 ил. 176011 ил ко РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) (11) ара за в (13) (51) МПК СОР 5/38 (2006.01) СОВ ПЛА (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ПОЛЕЗНОЙ МОДЕЛИ К ПАТЕНТУ (52) СПК СО 5/38 (201708): СВ ПИЯ (201708) (21)(22) Заявка: 2017115350, 02.05.2017 (24) Дата начала отсчета срока действия патента: 02.05.2017 Дата регистрации: 26.12.2017 Приоритет(ь): (22) Дата подачи заявки: 02.05.2017 (45) Опубликовано: 26.12.2017 Бюл. № 36 Адрес для переписки: 105005, Москва, ул. 2-я Бауманская, 5, стр. 1, МГТУ им. Н.Э. Баумана, ЦЗИС, для Одинокова С.Б. (каф. РЛ-2) (72) Автор(ы): Одиноков Сергей Борисович (КО), Лушников Дмитрий Сергеевич (КО), Маркин Владимир Васильевич (КО), Жердев Александр Юрьевич (КО), Чугунов Юрий Петрович (КО), Талалаев Владимир Евгеньевич (КО) (73) Патентообладатель(и): федеральное государственное бюджетное образовательное учреждение высшего образования "Московский государственный технический университет имени Н.Э. Баумана (национальный исследовательский университет)" (МГТУ им. Н.Э. Баумана) (КО) (56) Список документов, цитированных в отчете о поиске: 0$ 5569913 А1, 29.10.1996. 05 7911624 В2, 22.03.2011. $9 371422 АТ, ...

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Номер записи: 3
17-04-2018 дата публикации

Волоконно-оптическая система охраны периметра

Номер: RU0000178688U1
Автор: Борис Васильевич Авдеев, Юрий Харитонович Болотов
Принадлежит: Закрытое акционерное общество &#34;Фосенс&#34;

Полезная модель относится к системам охраны, работающим на основе регистрации воздействии на протяженный чувствительный элемент. Волоконно-оптическая система охраны периметра состоит из протяженного, охватывающего периметр, чувствительного элемента, содержащего, по меньшей мере, одно основное оптическое волокно и защитную оболочку, из источника оптического излучения, подключенного к одному концу основного оптического волокна, и подключенного к его другому концу оптоэлектронного блока, функционирующая на основе регистрации изменений интерференционной картины, возникающей в результате воздействия на чувствительный элемент. Система также содержит, по меньшей мере, один делитель оптического излучения, по меньшей мере, одно дополнительное оптическое волокно в общей оболочке с основным, при этом оптическое излучение подается от делителя оптического излучения в дополнительное оптическое волокно со стороны конца основного оптического волокна, подключенного к оптоэлектронному блоку, излучение из другого конца дополнительного оптического волокна направляется в оптоэлектронный блок, дополнительное оптическое волокно имеет дополнительную длину, размещенную со стороны оптоэлектронного блока, защищенную от механических воздействий, равную длине охраняемого периметра, а оптоэлектронный блок содержит систему измерения разницы времени прихода сигналов воздействия. Технический результат - определение точного места нарушения периметра. 1 ил. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 178 688 U1 (51) МПК G01H 9/00 (2006.01) G01D 5/353 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ПОЛЕЗНОЙ МОДЕЛИ К ПАТЕНТУ (52) СПК G01D 5/353 (2006.01) (21)(22) Заявка: 2016146807, 29.11.2016 (24) Дата начала отсчета срока действия патента: (73) Патентообладатель(и): Закрытое акционерное общество "Фосенс" (RU) Дата регистрации: 17.04.2018 (56) Список документов, цитированных в отчете о поиске: WO 2013185208 A1, 19.12.2013. US 7142736 B2, 28.11.2006. US 6594055 B2, 15.07.2003. ...

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Номер записи: 4
26-09-2019 дата публикации

Многоканальный анализатор сигналов волоконно-оптических датчиков на основе волоконных брэгговских решеток

Номер: RU0000192705U1
Автор: Андрей Алексеевич Оглезнев, Виктор Александрович Симонов, Иван Сергеевич Шелемба
Принадлежит: Общество с ограниченной ответственностью &#34;Инверсия-Сенсор&#34; (ООО &#34;Инверсия-С&#34;)

Полезная модель относится к области измерительной техники и может быть использована для измерения спектральных характеристик и показаний с волоконно-оптических датчиков, в частности в тепловой и ядерной энергетике, в химической и нефтегазовой, а также в критических узлах других отраслей промышленности.Техническим результатом настоящего технического решения является повышение точности определения относительного смещения спектра отражения брэгговской решетки, возможность определения абсолютной длины волны отражения ВБР, а также нечувствительность к спектральным потерям в линии и приемной части.Разработан анализатор сигналов, включающий перестраиваемый (на 80 нм) источник оптического излучения, средства передачи света, датчик на основе 8 линий волоконных брегговских решеток (ВБР), интерферометр и процессор. Брэгговские длины волн ВБР каждой линии различаются на постоянную величину, т.е. λ-λ=const. Средства передачи света обеспечивают направление света от источника излучения к ВБР-датчикам, а отраженное от ВБР-датчиков излучение на интерферометр, подключенный через фотоприемники к процессору, который управляет процессами перестройки источника переключением оптических переключателей в составе средств передачи света и детектора и обрабатывает сигналы с фотоприемников, сопоставляя их с калибровочными данными, выдает значение текущей длины волны отражения каждого из ВБР-датчиков в линии (линиях).Интегрально-оптическое исполнение элементов: источника, средств передачи света: ответвителя, делителя, спектрально-селективного ответвителя, коммутатора и интерферометра Маха-Цандера позволяет получить малогабаритный прибор с высокой вибростойкостью и температурной стабильностью. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 192 705 U1 (51) МПК G01M 11/00 (2006.01) G01N 21/17 (2006.01) G01D 5/353 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ПОЛЕЗНОЙ МОДЕЛИ К ПАТЕНТУ (52) СПК G01L 11/02 (2019.08); G01N 21/17 (2019.08); G01D 5/35329 (2019.08) (21)(22) Заявка: ...

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Номер записи: 5
12-01-2012 дата публикации

Position encoder apparatus

Номер: US20120007980A1
Автор: Andrew P. Gribble, Iain R. Gordon-Ingram
Принадлежит: RENISHAW PLC

A position encoder apparatus, including a scale having a series of position features; and a readhead configured to read the series of position features via a snapshot capture process. The snapshot capture process is adaptable so as to compensate for the relative speed between the scale and readhead.

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Номер записи: 6
19-01-2012 дата публикации

Optical sensor

Номер: US20120012740A1
Автор: Hiromasa Fujita
Принадлежит: Olympus Corp

According to one embodiment, an optical sensor includes a photodetector and a substrate. The photodetector detects light. The substrate in which the photodetector is received includes at least three layers including a cover layer, a spacer layer, and a base layer. The substrate includes an electrical conductive portion for the photodetector.

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Номер записи: 7
26-01-2012 дата публикации

Remote Sensing

Номер: US20120017687A1
Автор: David John Hill, Richard John Davis
Принадлежит: Qinetiq Ltd

A plurality of sensors output information into a distributed acoustic sensing (DAS) system via acousto-mechanical signals. The sensors are coupled to the optic fibre at the centre of the DAS system indirectly, the acousto-mechanical signal being transmitted via an intermediary body, such as the ground or a conduit.

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Номер записи: 8
02-02-2012 дата публикации

Position encoder apparatus

Номер: US20120025066A1
Автор: Andrew P. Gribble, Iain R. Gordon-Ingram, Simon E. McAdam
Принадлежит: RENISHAW PLC

A position encoder kit, including: a scale comprising a series of position features; and a readhead. The readhead includes a detector for receiving configuration information from a configuration item. The readhead is configured to operate in accordance with the configuration information. The readhead also includes a receiver interface via which the readhead can supply position information to a receiver.

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Номер записи: 9
09-02-2012 дата публикации

Two dimensional encoder system and method

Номер: US20120032067A1
Автор: Daniel Gene Smith, Eric Peter Goodwin
Принадлежит: Nikon Corp

An encoder system and method are provided, that is designed to improve 2D encoder systems and methods in areas such as accuracy, compactness, stability, resolution, and/or light efficiency. Moreover, the system and method of this invention provides a new concept in a retroreflector that while particularly useful in applicants' system and method, is believed to have more general utility in optical imaging systems and methods.

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Номер записи: 10
01-03-2012 дата публикации

Displacement detecting device

Номер: US20120050748A1
Автор: Akihiro Kuroda
Принадлежит: Mori Seiki Co Ltd

A displacement detecting device includes an irradiation optical system, an interference optical system, a light-receiving section, and a displacement detecting section. The irradiation optical system causes two light-beams to be incident on a diffraction grating respectively at different angles with respect to a plane perpendicular to the X-direction along which grating structures of the diffraction grating are periodically arranged. The interference optical system causes two Mth-order diffracted lights of respective light-beams incident on the diffraction grating to interfere with each other, so as to generate an interference light. The light-receiving section receives the interference light and detects an interference signal. The displacement detecting section detects a vertical displacement of a surface having the diffraction grating arranged thereon based on the change of the interference signal.

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Номер записи: 11
05-04-2012 дата публикации

Position-Measuring Device

Номер: US20120081711A1
Автор: Ulrich Benner
Принадлежит: Dr Johannes Heidenhain GmbH

A position-measuring device is suited for detecting the relative position of a scanning unit and a reflection measuring grating movable relative thereto in at least one measuring direction. The scanning unit includes a primary light source as well as at least one detector assembly in a detection plane. A periodic configuration of point light sources is able to be generated in the detection plane from the primary light source. The primary light source is disposed above the detection plane.

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Номер записи: 12
03-05-2012 дата публикации

Hysteresis-Compensating Interpolation Circuits in Optical Encoders

Номер: US20120104236A1
Автор: Chung Min Thor, Gim Eng Chew, Weng Chong Sam
Принадлежит: Avago Technologies ECBU IP Singapore Pte Ltd

Disclosed are various embodiments of circuitry and methods to compensate for variations in hysteresis associated with the comparators of an interpolation circuit in a single track optical encoder. Such variations in hysteresis may be minimized or eliminated by providing appropriately configured resistor ladder circuits to condition the inputs to the comparators, or by programming or trimming resistors in positive feedback loops of the comparators. The single track optical encoder configurations disclosed herein permit very high resolution reflective optical encoders in small packages to be provided. Methods of making and using such optical encoders are also disclosed.

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Номер записи: 13
24-05-2012 дата публикации

Optical Encoder

Номер: US20120126102A1
Автор: Jean-Louis Bigand
Принадлежит: Thales SA

Optical encoders supply binary logic signals representing the relative position increments of two elements of the encoder, the two elements being mobile relative to one another. The first element bears at least one mark and the second element bears a pair of detection cells for detecting the mark. The dimensions of the mark are defined so that said mark can be detected either by neither of the two cells, or by a single cell or by both cells. The invention is well suited to angular encoders, and makes it possible to widen the manufacturing tolerances of the marks on the first element and on the relative position of the two cells.

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Номер записи: 14
21-06-2012 дата публикации

Optical position measuring instrument

Номер: US20120154805A1
Автор: Wolfgang Holzapfel
Принадлежит: Dr Johannes Heidenhain GmbH

An optical position measuring instrument including a scanning plate and a scale, wherein the scale and the scanning plate are movable relative to one another. The optical position measuring instrument including a grating and a light source that emits a beam toward the grating, wherein the grating receives the beam and splits the beam into two partial beams with orthogonal polarization states. The optical position measuring instrument including a polarizer being arranged in beam paths of the two partial beams, wherein the polarizer has a structure to generate polarization effects on the two partial beam striking the polarizer that are periodically variable, wherein a polarization period of the periodically variable polarization effects is greater than a graduation period of the grating. The two partial beams being reunified into a resultant beam. A detection unit that receives the resultant beam and generates a plurality of displacement-dependent scanning signals.

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Номер записи: 15
12-07-2012 дата публикации

Remote displacement sensor, including an optical strain gauge, an assembly and system therewith

Номер: US20120176629A1
Автор: Mark A. Ritter, Roy D. Allen
Принадлежит: ILLINOIS TOOL WORKS INC

The disclosure relates to a remote displacement sensor, such as an optical strain gauge, which uses an optical amplifier implemented by patterns, such as, but not limited to, moiré patterns, to calculate changes in position or gauge length. In the embodiment implemented as a strain gauge with moiré patterns, two foil layers are provided, a lower foil layer with a reference or static moiré pattern generated by the overlaying of a first pattern with parallel lines at a first fundamental frequency and a second pattern with parallel lines at a second fundamental frequency. The lower foil layer further includes a first section with a first pattern with parallel lines at the first fundamental frequency while the upper layer provides a second section with a second pattern with parallel lines at the second fundamental frequency. The overlaying of the foils causes an overlying of the first and second sections thereby causing a moiré pattern of the same wavelength as the reference pattern. However, relative movement of the two foils perpendicular to the parallel lines, in response to a movement in the gauge length in response to strain on the specimen, causes a phase change in the overlaid pattern which is greater than the relative movement. The image of the optical strain gauge is captured by a camera or other optical device and the resulting image is processed by a Fast Fourier Transform or similar algorithm to determine the phase change, thereby calculating the change in gauge length and therefore the resulting strain.

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Номер записи: 16
23-08-2012 дата публикации

Injection Device Comprising An Optical Sensor

Номер: US20120215162A1
Автор: Bodo VON MÜNCHOW, Carsten Bitsch Pedersen, Per Mølgaard PEDERSEN, Preben Mikael Nielsen
Принадлежит: Novo Nordisk AS

The present invention relates to an injection device comprising an optically-based sensor for determining the position or setting of a dose setting member arranged to set a dose to be injected from the injection device. In particular, the present invention relates to an injection device comprising a rotatably mounted member having a plurality of optically coded paths arranged on an outer surface thereof. The rotatably mounted member is operatively connected to the dose setting member and is adapted to rotate with the dose setting member.

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Номер записи: 17
06-09-2012 дата публикации

Optic fibres and fibre optic sensing

Номер: US20120222487A1
Автор: David John Hill, Magnus Mcewen-King, Roger Ian Crickmore
Принадлежит: Optasense Holdings Ltd

Fibre optic cables with improved performance for use in distributed sensing, for instance in distributed acoustic sensors, are disclosed. In one embodiment a fibre optic cable ( 210 ) comprises a core ( 208 ) and cladding ( 206 ) disposed within a buffer material ( 202 ) and surrounded by a jacket ( 204 ) and arranged so that the core is offset from the centre of the cable. By offsetting the core from the centre of the jacket any bending effects on the core can be maximised compared with the core being located at the centre of the cable.

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Номер записи: 18
04-10-2012 дата публикации

Sensor and bonding agent for same

Номер: US20120247237A1
Автор: Akihiko Nishimura, Hirokazu Suzuki, Hisayoshi Ishibashi, Yukihiro Shimada
Принадлежит: JAPAN ATOMIC ENERGY AGENCY, Kumagai Gumi Co Ltd

A sensor and bonding agent for the sensor wherein thickness of the bonding agent interposed between the sensor and measuring object can be kept uniform to maintain uniform bonding force of the bonding agent and a peeling phenomenon of the bonding agent occurring due to a difference in thermal expansion between the measuring object and bonding agent and/or between the bonding agent and the sensor can be prevented. The sensor is attached, through the bonding agent, to a high-temperature measuring object, include a sensor main body having a detecting section, a block body constructed by integrally forming the sensor main body using a molding process. The block body is made of a ceramic-based bonding material that the same as a material forming the bonding agent and, on a side of the measuring object of the block body, a bonding surface of the bonding agent is formed.

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Номер записи: 19
04-10-2012 дата публикации

Angular correction method for rotary encoder

Номер: US20120248300A2
Автор: Hayami Kikawa, Satoshi Yanobe
Принадлежит: Sokkia Topcon Co Ltd

[Object] To provide an angular correction method with which angular skip does not occur in determining an angle between angular graduations of a dial of a rotary encoder by interpolation calculation. [Solution Means] Angular correction data are obtained by a residual curve determining step (S 2 ) of determining a residual r i between a position computed from a model and an actually read position P i , and of fitting the residual r i to a polynomial f(x) which is a function of an angular graduation image number x to determine a residual curve, r=f(x), a slope computing step (S 4 ) of computing a tangential slope f′(x i ) of the residual curve; an angular skip computing step (S 5 ) of computing an angular graduation image position correction quantity C i from a residual r i and the slope f′(x i ), of determining a measured angle value θ 0 by using the correction quantity C i , of switching the combination of angular graduation images to a forward side and a backward side to determine measured angle values θ −1 and θ +1 , and of computing the angular skip quantity; an order determining step (S 7 ) of determining the order of the polynomial f(x) such that the angular skip quantity is minimized; and an angular correction data recording step (S 8 ) of recording the residual and the tangential slope.

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Номер записи: 20
11-10-2012 дата публикации

Fiber optic transducers, fiber optic accelerometers and fiber optic sensing systems

Номер: US20120257208A1
Автор: Agop Hygasov Cherbettchian, David T. Beatson, Eric Lee Goldner, Gerald Robert Baker, James Kengo Andersen
Принадлежит: US Seismic Systems Inc, US SENSOR SYSTEMS Inc

A fiber optic transducer is provided. The fiber optic transducer includes a fixed portion configured to be secured to a body of interest, a moveable portion having a range of motion with respect to the fixed portion, a spring positioned between the fixed portion and the moveable portion, and a length of fiber wound between the fixed portion and the moveable portion. The length of fiber spans the spring. The fiber optic transducer also includes a mass engaged with the moveable portion. In one disclosed aspect of the transducer, the mass envelopes the moveable portion.

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Номер записи: 21
18-10-2012 дата публикации

Displacement sensor using multiple position sensitive photodetectors

Номер: US20120262733A1
Автор: Kim Atherton
Принадлежит: Mitutoyo Corp

A position sensing device having a high range to resolution ratio comprises a light source arrangement, a moving aperture arrangement and a multiple position sensitive detector (PSD) arrangement. The multiple PSD arrangement comprises a plurality of position sensitive detectors arranged along at least two detection tracks along a measuring axis. Each of the plurality of position sensitive detectors shares a common portion of a total measuring range along the measuring axis with an adjacent position sensitive detector which is on a different detector track. The total measurement range is larger than the detector range of each of the position sensitive detectors.

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Номер записи: 22
25-10-2012 дата публикации

Arrangement for determining a longitudinal position of a stopper

Номер: US20120268741A1
Автор: Anke Liewald, Christian Pommereau, Nils Basso, René RICHTER, Robert Witt, Thomas Nagel
Принадлежит: Sanofi Aventis Deutschland GmbH

The invention refers to an arrangement and a method for determining a longitudinal position of a stopper for sealing a compartment of a translucent medicament container for a liquid medicament (M). The arrangement comprises a circular light source and a photo sensitive sensor, wherein either the light source or the sensor is laterally arrangeable next to the medicament container extending over at least part of the length of the medicament container, and wherein the respective other of the light source and the sensor is arrangeable in a circular manner around a head of the medicament container. The light source is arranged to emit light into the medicament container. The light is scattered by the medicament or medicament container and detected by the sensor. The sensor is connected to a processor unit for detecting the position of the stopper).

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Номер записи: 23
25-10-2012 дата публикации

Rotary Position Sensor

Номер: US20120271457A1
Автор: Benjamin P. Gottemoller, Isaac J. Sachs
Принадлежит: Caterpillar Inc

A rotary position sensor includes a rotatable disk, a first light sensor configured to generate a first opacity signal, a second light sensor configured to generate a second opacity signal, and a comparator. The opacity of the rotatable disk is substantially unique at each radial angle value. The comparator is configured to generate a disk position signal as a function of the first opacity signal and the second opacity signal.

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Номер записи: 24
08-11-2012 дата публикации

Method and apparatus for measuring fiber twist by polarization tracking

Номер: US20120281205A1
Автор: Charles G. Askins
Принадлежит: US Department of Navy

A method of measuring fiber twist in a multi-core optical fiber bearing an FBG with polarization dependent reflectivity. The state of polarization of the launched light is adjusted until the reflected FBG wavelength is maximal, indicating that light reaching the FBG is linearly polarized, and the polarization axis of the light reaching the FBG is aligned with the slow birefringent axis of the FBG; the SOP of launched light is now measured. Bending experienced by the fiber is measured conventionally, and birefringence produced by bending of the multi-core optical fiber is calculated. A candidate amount of twist between the launch location and the FBG is proposed, and the corresponding twist-induced birefringence is calculated. When calculations show that light with the launched SOP becomes linearly polarized and aligned with the FBG after traversing a fiber section with the calculated birefringences and proposed rotation, the amount of twist has been properly identified.

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Номер записи: 25
22-11-2012 дата публикации

Optical fibre sensor assembly

Номер: US20120293806A1
Автор: Geoffrey A. Cranch
Принадлежит: Qinetiq Ltd

An optical fibre sensor assembly comprises a source of a plurality of different frequency substantially monochromatic signals ( 1, 2, 3, 4 ); a modulator connected to the output of the source to produce a train of output pulses of the monochromatic signals; a plurality of sensor sub-assemblies connected to the output of the modulator, each sub-assembly comprising an optical drop multiplexer (ODM) ( 13 ), a sensor array ( 14 ) comprising a plurality of sensor elements and an optical add multiplexer (OAM) ( 15 ); a wavelength demultiplexer (WDM), having an input coupled to the sub-assemblies output; a plurality of detectors, each detector having an input connected to receive a respective output of the WDM and providing at an output thereof a signal corresponding to a respective frequency of the modulated monochromatic signals; and an interrogation system, having a plurality of inputs connected such that each input receives the output signal from a respective detector.

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Номер записи: 26
13-12-2012 дата публикации

Linear position measuring system and method for determining the position of a carriage in relation to a slide rail

Номер: US20120313630A1
Автор: Klaus-Dieter Goetz
Принадлежит: Schneeberger Holding AG

A linear position measuring system ( 10 ) and a method for determining a position of a carriage in relation to a slide rail ( 12 ), with an incremental scale ( 14 ) placed along the slide rail ( 12 ) and a scanner secured to the slide scale. The scanner is designed to scan a plurality of incremental markings along the incremental scale ( 14 ), wherein the incremental markings can be scanned as an essentially analog signal progression. The scanner is designed to scan the incremental markings with a variable scanning frequency. The scanning frequency can be adaptively varied in relation to a currently acquired frequency of the analog signal progression, wherein the variable scanning frequency measures at least twice the currently acquired frequency of the analog signal progression.

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Номер записи: 27
03-01-2013 дата публикации

Optical encoder

Номер: US20130001411A1
Автор: Eiji Yamamoto, Ryo TOJO
Принадлежит: Olympus Corp

An optical encoder includes a light projecting portion, a light receiving portion, and a scale arranged between the light projecting portion and the light receiving portion. The scale includes a light guiding portion which allows light to transmit therethrough and has a light guiding function of guiding at least a part of the light projected by the light projecting portion in a direction vertical to thickness direction thereof through the light guiding portion. The light receiving portion receives the light guided by the scale and relatively moves with respect to the scale.

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Номер записи: 28
28-03-2013 дата публикации

ROTARY ENCODER, ROTARY MOTOR, AND ROTARY MOTOR SYSTEM

Номер: US20130076289A1
Автор: YAMAGUCHI Yosuke, YOSHIDA Yasushi, YOSHIDOMI Shirou
Принадлежит: KABUSHIKI KAISHA YASKAWA DENKI

The encoder includes a disk in a disk shape that is arranged rotatably about a rotation axis and that includes one track in a ring shape on which a rotating grating is formed and one or more origin detection areas serving as partial areas on which a rotating grating is formed, and a mask that is fixed and arranged in a manner facing the disk and on which one or more fixed gratings are formed so as to constitute a diffraction interference optical system together with the rotating gratings. A plurality of slits and included in at least one rotating grating are formed along a curved line obtained by curving a plurality of radial lines about the rotation axis in the circumferential direction at predetermined curvature such that pitches and of the slits and can be set to a predetermined value. 1. A rotary encoder comprising:a disk in a disk shape that is arranged rotatably about a rotation axis and that includes one or more tracks in a ring shape on which an optical rotating grating is formed on whole circumference and one or more origin detection areas serving as partial areas on which an optical rotating grating is formed and that are offset from the rotation axis; anda mask that is fixed and arranged in a manner facing the disk and on which two or more optical fixed gratings capable of constituting a diffraction interference optical system together with each of the rotating grating of the tracks and the rotating grating of the origin detection areas are formed, whereina plurality of slits included in the rotating grating of the origin detection areas are inclined slits formed in a manner inclined in a circumferential direction with respect to radial lines about the rotation axis or curved slits curved in the circumferential direction with respect to the radial lines about the rotation axis.2. The rotary encoder according to claim 1 , wherein a plurality of slits included in the rotating grating of the origin detection areas are formed such that a pitch between the ...

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Номер записи: 29
04-04-2013 дата публикации

Narrow linewidth brillouin laser

Номер: US20130083813A1
Автор: Arthur H. Hartog
Принадлежит: Schlumberger Technology Corp

A Brillouin laser having a narrowed linewidth, reduced relative intensity noise, and increased output power includes a pump laser that provides pump energy to an optical fiber resonant cavity to stimulate Brillouin emission. The output of pump laser is stabilized and its linewidth is narrowed by locking the frequency and phase of the optical signal generated by the pump laser to a longitudinal mode of the optical fiber resonant cavity. In addition, the resonant cavity is temperature and/or strain-tuned so that the Brillouin gain is substantially centered on a longitudinal mode of the cavity, thereby ensuring that the Brillouin frequency shift is substantially equal to an integer number of the free spectral range of the cavity.

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Номер записи: 30
11-04-2013 дата публикации

ENCODER APPARATUS USING LIQUID TO SUPPRESS DETECTION FAILURE

Номер: US20130087696A1
Автор: MAKINOUCHI Susumu
Принадлежит: NIKON CORPORATION

An encoder apparatus comprises a first scale member with a scale region on which a scale is arranged; a detector that detects light from the scale region; and a retaining member with a retaining surface that is arranged so as to face a surface of the first scale member including the scale region via a predetermined gap, and that retains a liquid at least between the retaining surface and the first scale member. 1. An encoder apparatus comprising:a first scale member with a scale region including a scale and a region of lyophilic property arranged at outer circumferential edges of the scale region;a detector that detects light from the scale region; anda retaining member with a retaining surface that faces the scale region via a gap and retains a liquid between the retaining surface and the scale region, wherein the first scale member moves relative to the detector in a state with the scale region being in contact with the liquid.2. The encoder apparatus according to claim 1 , whereinthe detector detects the light via the liquid.3. The encoder apparatus according to claim 1 , whereina liquid supply port that supplies the liquid between the scale region and the retaining surface.4. An encoder apparatus comprising:a first scale member with a scale region including a scale and an external region arranged external side of the scale region;a detector that detects light from the scale region; anda retaining member with a retaining surface that faces the scale region via a gap and retains a liquid between the retaining surface and the scale region provided lyophilic property,wherein the first scale member moves relative to the detector in a state with the scale region being in contact with the liquid.5. The encoder apparatus according to claim 4 , whereinthe detector detects the light via the liquid.6. The encoder apparatus according to claim 1 , whereina liquid supply port that supplies the liquid between the scale region andthe retaining surface.7. An encoder apparatus ...

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Номер записи: 31
25-04-2013 дата публикации

ENCODER AND APPARATUS USING THE SAME

Номер: US20130099105A1
Автор: Nagura Chihiro, NAKAMURA Hitoshi
Принадлежит: CANON KABUSHIKI KAISHA

The encoder includes a scale including first and second periodic patterns, and a detector relatively movable with respect to the scale and whose detection state is switchable between a first detection state to read the first periodic pattern and output a first signal and a second detection state to read the second periodic pattern and output a second signal. A processor performs a first process to detect a first absolute position by using the first and second signals and then performs a second process to calculate a relative movement amount by using a specific signal that is one of the first and second signals and detect a second absolute position by using the relative movement amount and the first absolute position. The specific signal is obtained from the detector set in a same detection state as that set last in the first process. 1. An encoder comprising:a scale provided with a first periodic pattern and a second periodic pattern having a period larger than that of the first periodic pattern;a detector relatively movable with respect to the scale and whose detection state is switchable between (a) a first detection state to read the first periodic pattern and output a first signal having a changing period corresponding to the first periodic pattern and (b) a second detection state to read the second periodic pattern and output a second signal having a changing period corresponding to the second periodic pattern; anda processor configured (a) to perform a first process to detect a first absolute position by using both the first and second signals respectively obtained from the detector set in the first and second detection states and (b) to perform, after performing the first process, a second process to calculate a relative movement amount by using a specific signal that is one of the first and second signals obtained from the detector set in one of the first and second detection states and detect a second absolute position by using the relative movement amount ...

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Номер записи: 32
09-05-2013 дата публикации

INDEXED OPTICAL ENCODER, METHOD FOR INDEXING AN OPTICAL ENCODER, AND METHOD FOR DYNAMICALLY ADJUSTING GAIN AND OFFSET IN AN OPTICAL ENCODER

Номер: US20130112861A1
Автор: York Frederick
Принадлежит: FARO TECHNOLOGIES, INC.

An optical encoder may include an encoder disk, an illumination system, and a detector to detect light diffracted from the encoder disk. The encoder disk may include a signal track comprising a diffraction grating, and an index track comprising a reflective index mark, wherein a width of the index mark is larger than a pitch of the diffraction grating. An indexing method may include providing an encoder disk, providing an illumination system to direct light to the encoder disk, providing a detector structured to detect light diffracted from the encoder disk, calculating an estimated count of quadrature states from a rising edge of an index pulse to a middle of the index interval, and calculating the quadrature state at an approximate center of the index pulse. A dynamic parameter correction method may include calculating a target gain and offset and correcting values based on the target gain and offset. 1. An indexing method for use with an optical encoder , the indexing method comprising:providing an encoder disk, comprising:a signal track comprising a diffraction grating formed as a ring on the encoder disk; andan index track formed as a ring on the encoder disk, the index track comprising an index mark provided at an index angular coordinate;providing an illumination system structured to direct light to the encoder disk;providing a detector structured to detect light diffracted from the encoder disk, the detector comprising:two offset detectors structured to detect light diffracted from the signal track and output a quadrature signal; andan index detector structured to detect light reflected from the index track and output an index pulse;{'sub': 'est', 'calculating an estimated state count kof quadrature states from a rising edge of the index pulse to a middle of the index interval;'}{'sub': kest', 'kest', 'est, 'calculating Q, wherein Qis the quadrature state at kand corresponds to the quadrature state at an approximate center of the index pulse; and'} ...

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Номер записи: 33
23-05-2013 дата публикации

OPTICAL ENCODER AND APPARATUS INCLUDING THE SAME

Номер: US20130126718A1
Автор: Nagura Chihiro, NAKAMURA Hitoshi
Принадлежит: CANON KABUSHIKI KAISHA

The optical encoder includes a scale provided with a periodic pattern in which an optical portion is periodically formed with a first period in a first direction, and a light receiver movable relatively with the scale in the first direction and photoelectrically converts a detection light from a light source and then passing through the optical portions. The optical portion periodically has a pattern, which is formed by pattern portions mutually adjacent in a second direction orthogonal to the first direction and mutually shifted in the first direction, in the second direction with a second period of t. A width w of the light source in the second direction satisfies w=(a+b)/b·nt where n represents a natural number, and a:b represents a ratio of a distance from the light source to the periodic pattern and a distance from the periodic pattern to the light receiver. 7. An optical encoder comprising:a scale provided with a periodic pattern in which an optical portion reflecting or transmitting light is periodically formed with a first period in a first direction; anda light receiver movable relatively with the scale in the first direction and configured to photoelectrically convert a detection light emitted from a light source and then passing through the optical portions to output a signal having a change period corresponding to the first period,wherein, when a direction orthogonal to the first direction in the periodic pattern is defined as a second direction, the periodic pattern periodically includes a pattern, which is formed by the optical portion and a non-optical portion, in the second direction with a second period of t, and {'br': None, 'i': w', 'a+b', 'b·nt, '=()/'}, 'wherein a width w of the light source in the second direction satisfies the following conditionwhere n represents a natural number, and a:b represents a ratio of a distance from the light source to the periodic pattern and a distance from the periodic pattern to the light receiver.11. An optical ...

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Номер записи: 34
23-05-2013 дата публикации

Encoder device, method for measuring moving amount, optical apparatus, exposure apparatus, exposure method and method for producing device

Номер: US20130128255A1
Автор: Zhigiang Liu
Принадлежит: Nikon Corp

An encoder, which measures a relative moving amount of a second member relative to a first member, includes: a diffraction grating provided on the first member; a light-incident optical member causing a measuring light to come into a grating pattern surface of the diffraction grating substantially perpendicularly; a first reflecting member provided on the second member and reflecting a diffracted light generated from the diffraction grating; a first direction-changing member changing a direction of the diffracted light; a first photo-detector detecting an interference light generated by interference between a double diffracted light and other diffracted light than the double diffracted light or a reference light, the double diffracted light being generated, via diffraction of the diffracted light, from the diffraction grating; and a measuring section which obtains the relative moving amount of the second member relative to the first member by using a detection signal from the first photo-detector.

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Номер записи: 35
06-06-2013 дата публикации

Apparatus and Method for Detecting Pressure Signals

Номер: US20130141733A1
Автор: Dudley James H, JR. John L, Maida, Rodney Paul F, Skinner Neal G, Spross Ronald L
Принадлежит: Halliburton Energy Services, Inc.

An apparatus comprising an encoded pressure signal propagating in a fluid flowing in a conduit. An optical fiber measurement element has a reflector on one end and is disposed around at least a portion of the conduit. A light source injects a second optical signal and a third optical signal propagating in first and second optical fibers, respectively. A delay section is disposed in the second optical fiber. The second optical signal and the third optical signal are directed into the optical fiber measurement element and are reflected back from the reflective end such that at least a portion of the reflected second and third optical signals propagate through the second and first optical fibers respectively to an optical detector. The optical detector senses an interference between the reflected optical signals and outputs a first signal related thereto. 1. An apparatus comprising:an optical fiber measurement element disposed around at least a portion of a conduit;a reflector coupled to one end of the conduit;a light source injecting a first optical signal into a first beam splitter/coupler to split the first optical signal into a second optical signal propagating in a first optical fiber and a third optical signal propagating in a second optical fiber;a delay section disposed in the second optical fiber;a second beam splitter/coupler to combine and direct the second optical signal and the third optical signal into the optical fiber measurement element to the reflector, the reflector reflecting the second optical signal and the third optical signal back through the second beam splitter/coupler such that at least a portion of the reflected second optical signal propagates through the second optical fiber and at least a portion of the third optical signals propagates through the first optical fiber; andan optical detector sensing an interference between the reflected second optical signal and the reflected third optical signal caused by an encoded pressure signal ...

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Номер записи: 36
13-06-2013 дата публикации

POSITION MEASURING DEVICE

Номер: US20130146755A1
Автор: Wagner Jean-Jacques
Принадлежит: ELESTA RELAYS GMBH

A position measuring device comprises 16-. (canceled)7. A position measuring device , comprising:a housing;a plate having a keyed connection to the housing and defining a recess;a sensor mounted on the plate and having a light source and a light receiver element arranged in the housing;a rotatable rotary encoder configured to be mounted on a shaft of a device with a shaft support and arranged between the housing and the plate, the recess of the plate provided for the shaft support; anda reflective material measure with optical elements provided at a distance from the sensor, the material measure being arranged on a side of the rotary encoder opposite the housing and a larger part of the shaft support arranged on a same side of the rotary encoder as the material measure.8. The position measuring device of claim 7 , wherein the plate is connected with the keyed connection to the housing with a snap connection.9. The position measuring device of claim 7 , further comprising an adapter comprising a first fastener for connecting to the device and a second fastener for keyed connection to the housing.10. The position measuring device of claim 9 , wherein the second fastener comprises a snap connection.11. The position measuring device of claim 9 , further comprising a snap connection comprising one or more projections on the adapter and one or more recesses on the housing.12. The position measuring of claim 7 , further comprising an assembly bearing in the recess of the plate housing the shaft support.13. The position measuring device of claim 7 , wherein the device comprises a motor.14. The position measuring device of claim 7 , wherein the position measuring device comprises an encoder. This application is a national phase entry under 35 U.S.C. §371 of PCT/CH2011/000189 filed Aug. 19, 2011, which claims priority to Swiss Patent Application No. 1342/10 filed Aug. 19, 2010, Swiss Patent Application No. 1341/10 filed Aug. 19, 2010, and Swiss Patent Application No. 1343/10 ...

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Номер записи: 37
20-06-2013 дата публикации

POSITION MEASURING DEVICE

Номер: US20130155420A1
Автор: Wagner Jean-Jacques
Принадлежит: ELESTA RELAYS GMBH

A position measuring apparatus with 112-. (canceled)13. A position measuring device , comprising:at least one material measure having at least two tracks with an optical structure with focusing optical elements, a first track of the at least two tracks configured for producing an incremental signal and a second track comprising one of an index track and a coded track;at least one light receiver arranged at a distance from the material measure and forming at least one first sensor zone and at least one second sensor zone, each sensor zone comprising a plurality of light receiver elements, wherein the at least one first sensor zone is configured to interact with the first track for producing an incremental signal and wherein the at least one second sensor zone is configured to interact with the second track;a light source arranged at a distance from the material measure and at a distance from the light receiver;at least one transparent substrate present between the material measure and the light receiver, wherein the light receiver is deposited directly on the transparent substrate and on the side of the substrate opposite the material measure in the form of a thin-film structure comprised of a plurality of layers arranged one above another; anda supporting plate having a plurality of circuit-board conductors, the at least one transparent substrate arranged on the supporting plate, wherein the at least one transparent substrate and the supporting plate are joined together by a Flip-Chip process.14. The position measuring device of claim 13 , wherein the plurality of circuit-board conductors are on both faces of the supporting plate for contacting with the at least one light receiver and for contacting with a decoding circuit.15. The position measuring device of claim 14 , wherein the decoding circuit is arranged on the supporting plate.16. The position measuring device of claim 14 , wherein the decoding circuit is arranged on a side of the supporting plate opposite ...

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Номер записи: 38
27-06-2013 дата публикации

ADAPTABLE RESOLUTION OPTICAL ENCODER

Номер: US20130161499A1
Автор: Altendorf Eric Herbert, Tobiason Joseph Daniel
Принадлежит: MITUTOYO CORPORATION

A flexible optical displacement encoder configuration uses a source grating to illuminate a scale with structured light such that light from the scale is modulated with a beat frequency envelope which may have a relatively coarse pitch that matches a desired detector pitch. An imaging configuration provides spatial filtering to remove the high spatial frequencies from the modulation envelope to provide a clean signal in the detected fringe pattern. This combination of elements allows an incremental scale track pattern with a relatively finer pitch (e.g., 4, 5, 8 microns) to provide fringes with a coarser pitch (e.g., 20 microns) at a detector. Various scale resolutions can use a corresponding source grating such that all combinations can produce detector fringes that match the same economical detector component. 1. A device for measuring the relative displacement between two members , the device comprising:{'sub': 'SF', 'a scale grating extending along a measuring axis direction and having a scale pitch P;'}{'sub': 'MI', 'an illumination source comprising a light source that outputs light having a wavelength λ, and a structured illumination generating portion that inputs the light and outputs structured illumination to the scale grating where the structured illumination comprises an illumination fringe pattern oriented transversely to the measuring axis direction and that have an illumination fringe pitch Palong the measuring axis direction at a plane coinciding with the scale grating;'}an imaging portion positioned to receive operable spatially modulated image light output from the scale grating and output an operable periodic image of the spatially modulated image light when the scale grating is illuminated by the structured illumination from the illumination source; anda detector portion comprising a set of respective optical detectors positioned to respectively receive different phases of the operable periodic image, the set of respective optical detectors ...

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Номер записи: 39
27-06-2013 дата публикации

Encoder

Номер: US20130163654A1
Автор: Hitoshi Nakamura
Принадлежит: Canon Inc

An encoder ( 10 ) includes a sensor ( 1 ) configured to illuminate light on a single scale ( 100 ) to detect two phase signals having periods different from each other, an error signal generator ( 2 ) configured to arrange accumulated amounts of phase changes of the two phase signals when the scale ( 100 ) and the sensor ( 1 ) are relatively displaced from each other by a predetermined displacement so as to obtain two accumulated phase signals and to obtain a difference between the two accumulated phase signals so as to generate an error signal that is obtained by removing an accumulated phase component corresponding to the predetermined displacement, and an interpolation error detector ( 3 ) configured to average the error signal by using at least one of periods of the two phase signals so as to detect an interpolation error contained in at least one of the two phase signals.

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Номер записи: 40
04-07-2013 дата публикации

Photoelectric powered wireless sensor unit

Номер: US20130167662A1
Автор: Vijay Tippanna Talikoti
Принадлежит: Honeywell International Inc

This disclosure is directed to techniques for detecting one or more indications of rotational movement of a rotatable member. According to one example, at least one movement sensor is associated with the rotatable member and is configured to detect at least one measurement of rotational motion of the rotatable member. The at least one movement sensor is configured to be powered via at least one photoelectric element secured to the rotatable member. The at least one movement sensor is configured to communicate the at least one indication of the detected at least one measurement from the rotatable member via at least one wireless communications module associated with the rotatable member and powered via the at least one photoelectric element.

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Номер записи: 41
18-07-2013 дата публикации

ILLUMINATION PORTION FOR AN ADAPTABLE RESOLUTION OPTICAL ENCODER

Номер: US20130181121A1
Автор: Tobiason Joseph Daniel
Принадлежит:

An illumination portion of an optical encoder comprising a scale track extending along a measuring axis direction, an imaging portion, and a detector configuration. The illumination portion comprises: a light source configured to output source light; a collimation portion; and a structured illumination generating portion comprising a beam-separating portion and an illumination grating and configured to input the source light and output structured illumination to the scale track. The beam-separating portion is arranged to input the source light and output a first source light portion and a second source light portion to the illumination grating, such that they form beams that are spaced apart from one another along the measuring axis direction. The illumination grating is configured to diffract the first and second source light portions to the scale track such that only two orders of diffracted light overlap within an imaged region. 1. An illumination portion for an optical encoder which comprises a scale track extending along a measuring axis direction , an imaging configuration , and a detector configuration , the illumination portion comprising:a light source configured to output source light having a wavelength λ; anda structured illumination-generating portion configured to input the source light and provide structured illumination, wherein the structured illumination comprises an illumination fringe pattern oriented transversely to the measuring axis direction which is input to the scale track, the scale track is configured to spatially modulate the input illumination fringe pattern and output scale light comprising spatially modulated image light;', 'the detector configuration and imaging configuration are configured such that only scale light arising from an imaged region of the scale track is imaged to the detector configuration;', 'the structured illumination-generating portion comprises a beam-separating portion and an illumination grating;', 'the beam- ...

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Номер записи: 42
15-08-2013 дата публикации

PHOTOELECTRIC ENCODER

Номер: US20130206970A1
Автор: TAHARA Tomohiro
Принадлежит: MITUTOYO CORPORATION

A photoelectric encoder according to the present invention comprises a light-receiving unit including: a first and second light-receiving element column; and a light-blocking layer configured from a light-blocking portion and a light-transmitting portion, the first and second light-receiving element columns being disposed staggered in a second direction such that an arrangement pattern of light-receiving elements in the first and second light-receiving element columns has a pitch which is the same in a first direction and a phase which differs in the first direction, and the light-transmitting portion on the light-receiving surface of the light-receiving element in the first light-receiving element column and the light-transmitting portion on the light-receiving surface of the light-receiving element in the second light-receiving element column being formed so as not to overlap each other when staggered in the second direction. 1. A photoelectric encoder , comprising:a light source;a scale for generating a light-and-dark pattern of light in a first direction along a measurement axis by light irradiated from the light source; anda light-receiving unit including: a first and second light-receiving element column each configured from a plurality of light-receiving elements, the light-receiving elements being arranged in the first direction and configured to detect the light-and-dark pattern of light; and a light-blocking layer configured from a light-blocking portion and a light-transmitting portion formed on a light-receiving surface of the light-receiving element, the light-blocking portion configured to block the light-and-dark pattern of light, and the light-transmitting portion configured to allow transmission of the light-and-dark pattern of light,the first and second light-receiving element columns being disposed staggered in a second direction orthogonal to the first direction such that an arrangement pattern of the light-receiving elements in the first and ...

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Номер записи: 43
15-08-2013 дата публикации

Variable sensitivity interferometer systems

Номер: US20130208283A1
Автор: Edward Tapanes
Принадлежит: Fiber SenSys Inc

Variable Sensitivity optical sensors can have a respective actual sensitivity of one or more portions of the sensor corresponding, at least in part, to a selected environment of each respective sensor portion. Some disclosed sensors have a plurality of optical conduits extending longitudinally of the sensors. At least one of the optical conduits can have at least one longitudinally extending segment having one or more optical and/or mechanical properties that differs from the optical properties of an adjacent longitudinally extending segment, providing the conduit with longitudinally varying signal propagation characteristics. An optical sensor having such optical conduits can exhibit a longitudinally varying actual sensitivity. Nonetheless, such a sensor can exhibit a substantially constant apparent sensitivity, e.g., when each respective portion of the sensor exhibits an actual sensitivity corresponding to a selected environment. Innovative sensors can provide a low-incidence of false or nuisance alarms, accurate position and magnitude information, and other advantages.

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Номер записи: 44
22-08-2013 дата публикации

PHOTOELECTRIC ENCODER

Номер: US20130214137A1
Автор: HAYASHI Kenichi, Kawada Hiroaki
Принадлежит: MITUTOYO CORPORATION

A photoelectric encoder includes an irradiation unit configured to apply first and second irradiation light beams having a first linear polarization direction, a scale configured to produce first and second diffraction light beams having the first linear polarization direction by diffracting the first and second irradiation light beams, respectively, the scale having a glass plate whose front surface has a grating shape, a polarizing unit configured to convert the first diffraction light beam into a third diffraction light beam having a second linear polarization direction which is perpendicular to the first linear polarization direction, to produce first and second composite light beams by combining the second diffraction light beam and the third diffraction light beam, and to convert the first composite light beam into a circularly polarized third composite light beam, and a light receiver configured to receive the second composite light beam and the third composite light beam. 1. A photoelectric encoder comprising:an irradiation unit configured to apply first and second irradiation light beams having a first linear polarization direction;a scale configured to produce first and second diffraction light beams having the first linear polarization direction by diffracting the first and second irradiation light beams, respectively, the scale having a glass plate whose front surface has a grating shape;a polarizing unit configured to convert the first diffraction light beam into a third diffraction light beam having a second linear polarization direction which is perpendicular to the first linear polarization direction, to produce first and second composite light beams by combining the second diffraction light beam and the third diffraction light beam, and to convert the first composite light beam into a circularly polarized third composite light beam; anda light receiver configured to receive the second composite light beam and the third composite light beam.2. The ...

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Номер записи: 45
22-08-2013 дата публикации

Rotary Encoder

Номер: US20130214140A1
Автор: Riepertinger Sebastian
Принадлежит: DR. JOHANNES HEIDENHAIN GMBH

A rotary encoder includes a housing and a shaft, which has an axis. A graduated disk is fixed in place on the shaft in torsionally fixed manner. The shaft is adapted for the positionally accurate attachment to a first machine part. Furthermore, a scanning device for scanning the graduated disk is fixed in place on the housing, the housing being arranged such that an outer surface forms a positionally accurate rigid stop on a second machine part in the radial direction. The housing includes a housing body and a cover, the housing body and the cover being connected to each other by press-fitting. The housing has a mechanically flexible element which is deformed as a result of the press-fitting. 1. A rotary encoder , comprising:a housing;a shaft having an axis and positionally accurately attachable on a first machine part;a graduated disk mounted on the shaft in a torsionally fixed manner; anda scanning device, adapted to scan the graduated disk, fixed in place on the housing;wherein an outer surface of the housing forms a rigid stop face that is positionally accurate in a radial direction, in relation to a second machine part; andwherein the housing includes a housing body and a cover, the housing body and the cover connected to each other by a press-fit connection, the housing including a mechanically flexible element deformed by the press-fit connection.2. The rotary encoder according to claim 1 , wherein the press-fit connection is formed by a relative movement of the cover towards the housing body in a direction parallel to the axis.3. The rotary encoder according to claim 1 , wherein the element is integrally formed on the housing body.4. The rotary encoder according to claim 1 , wherein the element includes a flange extending along a periphery in a circumferential direction.5. The rotary encoder according to claim 1 , wherein the housing includes a plurality of mechanically flexible elements located at an offset in a circumferential direction.6. The rotary ...

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Номер записи: 46
22-08-2013 дата публикации

Sensing systems and few-mode optical fiber for use in such systems

Номер: US20130216176A1
Автор: Ming-Jun Li, Shenping Li
Принадлежит: Corning Inc

A sensing optical fiber comprising: a few-moded multi-segment core, said core comprising one core segment surrounded by another core segment, and at least one cladding surrounding said core; said core having an F factor (μm 2 ) of 100 μm 2 to 350 μm 2 , and is constructed to provide (i) an overlap integral between the fundamental optical guided mode and the fundamental acoustic guided mode of greater than 0.7 and (ii) the overlap integral between the LP11 optical guided mode and the fundamental acoustic guided mode at least 0.45.

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Номер записи: 47
29-08-2013 дата публикации

System For Sensing a Mechanical Property of a Sample

Номер: US20130220032A1
Автор: Javad Dargahi, Muthukumaran Packirisamy, Roozbeh Ahmadi
Принадлежит: Individual

A sensing element for sensing a mechanical property of a sample defining a sample surface using a contact force exerted the sample surface. The sensing element includes: a deformable element defining a contact surface and a deformable section in register with the contact surface, the deformable section being deformable between an undeformed configuration and a deformed configuration; a deformation sensor operatively coupled to the deformable section for sensing and quantifying a deformation of the deformable section between the deformed and undeformed configurations, the deformation sensor being an optical deformation sensor; and a force sensor operatively coupled to the deformable element for sensing the contact force exerted on the contact surface.

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Номер записи: 48
29-08-2013 дата публикации

Coding Members With Embedded Metal Layers For Encoders

Номер: US20130221212A1
Автор: Yik Foong Soo
Принадлежит: Avago Technologies ECBU IP Singapore Pte Ltd

A coding member having a plurality of base structures is illustrated. The base structures are arranged in a predetermined periodic manner and each base structure comprises first and second metal layers. The base structures are embedded in a body made from an encapsulant such that a surface of the first metal layer is exposed externally whereas the second metal layer is completely embedded inside the body. Encoders, having such coding member are illustrated. The encoders include transmissive and reflective optical encoders, as well as non-optical encoders such as magnetic and capacitive encoders.

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Номер записи: 49
29-08-2013 дата публикации

Distributed Optical Fibre Sensor

Номер: US20130222811A1
Автор: Handerek Vincent
Принадлежит: FOTECH SOLUTIONS LIMITED

There is described a distributed optical fibre sensor for detecting one or more physical parameters indicative of an environmental influence on a sensor optical fibre, as a function of position along the sensor fibre. The sensor uses probe light pulses of different wavelengths. At least some of the probe light pulses may also be of different pulse lengths. The relative phase bias between interferometric signals in backscattered probe light of different wavelength pulses may also be controlled. 1. A distributed optical fibre sensor for determining at least one physical parameter as a function of position along a sensing fibre from properties of probe light backscattered within the sensing fibre , the sensor comprising:a probe light source arranged to launch probe light pulses into the sensing fibre, the probe light pulses including successive groups each of two or more probe light pulses having different optical wavelengths to each other;a detector arranged to detect probe light backscattered in said sensing fibre, including separately detecting light of each of said different wavelengths; andan analyser arranged to determine said parameter as a function of position along the sensing fibre from said detected backscattered probe light of one or more of said wavelengths,wherein the sensor is arranged to adjust one or more of said plurality of different wavelengths to control the relative phase bias or biases between interferometric signals in the backscattered probe light arising from respective probe light pulses of said different wavelengths.2. The distributed optical fibre sensor of wherein the analyser is arranged to determine said parameter as a function of position along the sensing fibre from said detected backscattered probe light of all of said wavelengths.3. The distributed optical fibre sensor of wherein the sensor is arranged to control the relative phase bias between interferometric signals in the backscattered light arising from two or more of said probe ...

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Номер записи: 50
05-09-2013 дата публикации

REFLECTION ENCODER, SERVO MOTOR, AND SERVO UNIT

Номер: US20130229138A1
Автор: ARINAGA Yuji, MATSUTANI Yasuhiro, YOSHIDA Yasushi, YOSHIDOMI Shirou
Принадлежит: KABUSHIKI KAISHA YASKAWA DENKI

Reflected light can be effectively utilized by increasing a light receiving area. Incremental light receiving element groups are separated and arranged in the circumferential direction of a rotating unit while placing a light source therebetween. First and second absolute light receiving element groups are arranged at both sides of the outside and inside of the light source in the radial direction of the rotating unit. As a result, first and second absolute light receiving elements are continuously arranged, and also the incremental light receiving element groups and the absolute light receiving element groups can be arranged to surround the periphery of the light source from four directions. 1. A reflection encoder comprising:a rotating unit configured to be rotatably arranged around a rotating shaft center and on which an incremental pattern is formed along a circumferential direction; anda board configured to be arranged opposite the rotating unit, and a light source configured to emit light toward the rotating unit; and', 'an incremental light receiving element group configured to include a plurality of incremental light receiving elements for receiving reflected light from the incremental pattern, the incremental light receiving elements being separated and arranged on the board in the circumferential direction of the rotating unit while placing the light source therebetween., 'the board comprising2. The reflection encoder according to claim 1 , wherein the incremental light receiving elements are arranged on the board so that positions of the elements in the radial direction of the rotating unit are a same as that of the light source.3. The reflection encoder according to claim 1 , wherein{'b': 1', '2, 'when an optical path distance of outgoing light from the light source to the rotating unit is d, an optical path distance of reflected light from the rotating unit to the incremental light receiving element group is d, and a distance from a center of rotation ...

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Номер записи: 51
19-09-2013 дата публикации

ROTARY ENCODER AND METHOD OF DETECTING ABNORMALITY OF ROTARY ENCODER

Номер: US20130240719A1
Автор: MORIKAWA Akihiko, SATO Toshinori, UENO Junichi, USHIYAMA Takao
Принадлежит: Omron Corporation

A signal output unit generates an A phase output signal of a rectangular wave and a B phase output signal of a rectangular wave from the A phase sinusoidal wave signal and the B phase sinusoidal wave signal, respectively and outputs the generated signals. An internal signal generating unit (comparator) generates an A phase internal signal of a rectangular wave and a B phase internal signal of a rectangular wave from the A phase sinusoidal wave signal and the B phase sinusoidal wave signal, respectively, which are further processed by counters, and an abnormality detector. Each counter resets in response to a pulse edge of a signal for detection. The abnormality detector detects an abnormality when the count value of at least one of counters reaches a prescribed value. 1. A rotary encoder of an incremental type , comprising:a rotation detector that outputs a continuous wave signal of a first phase and a continuous wave signal of a second phase according to rotation of a rotating body, the continuous signal of the first phase and the continuous signal of the second phase having a phase difference from each other;a signal output unit that generates a rectangular wave output signal of the first phase and a rectangular wave output signal of the second phase from the continuous wave signal of the first phase and the continuous wave signal of the second phase, respectively and outputs the rectangular wave output signals of the first phase and the second phase from the rotary encoder;an internal signal generator that generates a rectangular wave internal signal of the first phase and a rectangular wave internal signal of the second phase from the continuous wave signal of the first phase and the continuous wave signal of the second phase, respectively;a first counter that sets a count value in response to a pulse edge of the rectangular wave internal signal of the first phase and resets the count value in response to a pulse edge of the rectangular wave output signal of the ...

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Номер записи: 52
19-09-2013 дата публикации

Measuring Device for Determining and/or Monitoring at Least One Process Variable

Номер: US20130241530A1
Автор: Armin Wernet, Franco Ferraro, Kaj Uppenkamp, Wolfgang Brutschin
Принадлежит: Endress and Hauser SE and Co KG

A measuring device for determining and/or monitoring at least one process variable, comprising: a sensor unit; a first electronics unit which has a first microcontroller, and a second electronics unit which has a second microcontroller, and which is connected with the first electronics unit via a galvanically isolated transmission unit for energy- and data transmission. The first microcontroller produces at least one signal, which can vary in at least one characteristic, and supplies the signal to the transmission unit, that the signal controls the energy- and data transmission, that the first microcontroller and/or the second microcontroller determines at least one current operating parameter, and that the first microcontroller sets at least one characteristic of the signal as a function of the operating parameter.

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Номер записи: 53
19-09-2013 дата публикации

ENCODER

Номер: US20130242289A1
Автор: Ishizuka Yoshi, Ito Shoji, Miyajima Tooru
Принадлежит: SANYO DENKI CO., LTD.

To realize an encoder having highly reliable detection accuracy and capable of reducing a device cost. A light detection unit of an encoder receives light irradiated by a light source and transmitted through light-transmitting portions of Gray code optical patterns of a rotating disk and a light-transmitting/shielding member, and detects the light as digital data. A magnetic detection unit detects a magnetic pattern of a magnet provided on a rotation center portion of the rotating disk as digital data. A processing unit compares the digital data of the magnetic detection unit and the digital data of the light detection unit, and corrects a detection error. 1. An encoder comprising:a rotating disk, on which a plurality of Gray code optical patterns having a light-transmitting portion and a light-shielding portion alternately in a rotation direction is formed in a radial direction;a light-transmitting/shielding member, on which an optical pattern having a light-transmitting portion and a light-shielding portion, and facing each of the Gray code optical patterns on the rotating disk is formed;a light source adapted to irradiate the Gray code optical patterns on the rotating disk and the optical pattern of the light-transmitting/shielding member with light;a light detection unit adapted to receive the light transmitted through the light-transmitting portions of the rotating disk and the light-transmitting/shielding member, and to output digital data in accordance with a rotation position of the rotating disk;a magnet provided on a rotation center portion of the rotating disk, and forming a magnetic pattern by an arrangement of a magnetic pole;a magnetic detection unit adapted to detect the magnetic pattern, and to output digital data in accordance with the rotation position of the rotating disk; anda processing unit adapted to obtain a rotation angle of the rotating disk using the digital data of the magnetic detection unit and the light detection unit.2. The encoder ...

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Номер записи: 54
26-09-2013 дата публикации

READHEAD CONTROL MECHANISM AND OPTICAL ENCODER

Номер: US20130248698A1
Автор: Ezaki Yutaka, ITOH Noboru
Принадлежит:

A readhead control mechanism serves to control a readhead included in an optical encoder that measures a mechanical displacement between a fixed portion and a movable portion by reading out a gradation mark on a scale provided on the fixed portion, by using the readhead that is provided on the movable portion. The readhead mechanism includes a securing member that secures the readhead onto the movable portion, an actuator that is directly or indirectly secured onto the readhead to shift the readhead in an approaching direction or in a distancing direction, and an actuator controller that controls the actuator to maintain a constant distance between the readhead and the scale. 1. A readhead control mechanism for controlling a readhead included in an optical encoder that measures a mechanical displacement between a first object and a second object by reading out a scale provided on the first object by the readhead provided on the second object , comprising:a securing member for securing the readhead onto the second object so that the readhead can be shifted in an approaching direction that the readhead approaches the scale, and in a distancing direction that the readhead distancing away from the scale;an actuator that is directly or indirectly secured onto the readhead, for shifting the readhead in the approaching direction or in the distancing direction; andan actuator controller for controlling the actuator to maintain a constant distance between the readhead and the scale.2. The readhead control mechanism according to claim 1 , further comprising a protective spring that is secured onto the actuator claim 1 , for shifting the actuator in the distancing direction by compression claim 1 , whereinthe protective spring shifts the actuator and the readhead in the distancing direction by being compressed when a force by the first object is applied to the readhead or to the securing member.3. The readhead control mechanism according to claim 1 , further comprising a ...

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Номер записи: 55
03-10-2013 дата публикации

Laser marking

Номер: US20130256284A1
Автор: Alexander D. S. ELLIN, James Reynolds Henshaw
Принадлежит: RENISHAW PLC

A method and apparatus is disclosed for producing precision marks for a metrological scale in the form of a stainless steel ribbon. A laser is used to produce ultra-short pulses which have a fluence at the ribbon such that ablation takes place. The laser light can be scanned via scanner and the pitch of the marks can be controlled. The ablative technique causes little thermal input and improves the accuracy of the scale.

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Номер записи: 56
10-10-2013 дата публикации

Optical decoder and multi-functional printer using the same

Номер: US20130264471A1
Автор: Ting-Shi Tsai
Принадлежит: Cal Comp Electronics and Communications Co Ltd, Kinpo Electronics Inc

An optical decoder and a multi-functional printer using the same are provided. The optical decoder includes a directional light source, a light guide bar and a light receiving unit. The light guide bar disposed on a light-emitting side of the directional light source has multiple scales. The light receiving unit is disposed on a side of the light guide bar, wherein the directional light source and the light receiving unit are disposed on different sides of the light guide bar. The light receiving unit is used to move along the light guide bar and read the scales of the light guide bar. The overall volume of a multi-functional printer can be reduced by applying the optical decoder therein.

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Номер записи: 57
10-10-2013 дата публикации

MEASURING TRANSDUCER FOR OBTAINING POSITION DATA AND METHOD FOR ITS OPERATION

Номер: US20130264472A1
Автор: Schimmer Jürgen, Wetzel Ulrich, Zettner Jürgen
Принадлежит: SIEMENS AKTIENGESELLSCHAFT

A measuring transducer for obtaining position data, with a transmit/receive unit having a plurality of light sources for scanning a dimensional scale, wherein the transmit/receive unit includes several light sources, in particular at least one light source having a plurality of emitters. 1. A measuring transducer for obtaining position data , comprising a transmit/receive unit having a plurality of light sources for scanning a dimensional scale.2. The measuring transducer of claim 1 , wherein at least one light source comprises a plurality of emitters.3. The measuring transducer of claim 2 , wherein the plurality of emitters are arranged in a row.4. The measuring transducer of claim 3 , wherein the row is oriented tangentially in relation to the dimensional scale to be scanned.5. The measuring transducer of claim 3 , wherein the row is oriented radially in relation to the dimensional scale to be scanned.6. The measuring transducer of claim 2 , wherein the plurality of emitters are arranged in a matrix structure.7. The measuring transducer of claim 2 , wherein a subset of emitters of the plurality of emitters is configured to be activated simultaneously.8. The measuring transducer of claim 2 , wherein a subset of emitters comprising an individual emitter or several emitters is configured to be activated independent of another subset of emitters comprising an individual emitter or several emitters.9. A method for obtaining position data by scanning a dimensional scale with a measuring transducer of a transmit/receive unit having a plurality of light sources claim 2 , with at least one light source having a plurality of emitters claim 2 , comprising activating a subset of emitters of the plurality of emitters simultaneously so as to obtain a specified minimum signal power.10. The method of claim 9 , further comprising:when an emitter is malfunctioning, performing one of the following operations:either automatically de-activating the malfunctioning emitter and ...

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Номер записи: 58
17-10-2013 дата публикации

ENCODER

Номер: US20130270428A1
Автор: Kimura Akihide
Принадлежит: MITUTOYO CORPORATION

A first reference pattern has a plurality of patterns, which are arranged periodically in a measurement axis direction and have the same width in the measurement axis direction. The plurality of patterns have the respective different pitches. At least one of the plurality of patterns is smaller in pitch than a first main signal pattern. A second sensor has a plurality of detection regions which are in one-to-one correspondence with the plurality of patterns of the first reference pattern. An addition calculating section calculates an addition signal by adding up output signals of the plurality of detection regions. A square calculating section calculates a squared signal from the addition signal. A judging section outputs a reference signal for determination of a reference position according to signal levels of the squared signal. 1. An encoder comprising:a main scale having a first main signal pattern being periodic in a measurement axis direction and a first reference pattern for determination of a reference position in the measurement axis direction;a first sensor and a second sensor which are opposed to the main scale and are movable relative to the main scale in the measurement axis direction, the first sensor detecting a variation of the relative position of the first main signal pattern in the measurement axis direction, the second sensor detecting how close to it the first reference pattern is located; anda signal processor configured to output a signal indicating a movement length of the main scale on the basis of an output signal of the first sensor using, as a reference, a reference position that is determined on the basis of an output signal of the second sensor, wherein:the first reference pattern has a plurality of patterns which are arranged in the measurement axis direction and have the same width in the measurement axis direction, the plurality of patterns being periodic in the measurement axis direction with the respective different pitches, at ...

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Номер записи: 59
24-10-2013 дата публикации

Automatic calibration of a microscope scanning system

Номер: US20130278941A1
Автор: Thomas Loerch
Принадлежит: Metasystems Hard and Software GmbH

The invention provides a method for automatic calibration of slides and a method for automatic calibration of slide frames and a slide for performing the method. To this end, slide frames ( 4; 210 ) with at least one slide seat and slide ( 212 a - 212 h; 300 ) are provided with a calibration marking ( 304 ). In particular the inventive slide ( 212 a - 212 h; 300 ) includes a slide substrate ( 302 ) and a calibration marking ( 304 ), the calibration marking ( 304 ) being connected to the slide substrate ( 302 ).

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Номер записи: 60
31-10-2013 дата публикации

Rotation Angle Detecting Apparatus

Номер: US20130284909A1
Автор: Fumio Ohtomo, Kaoru Kumagai, Kazuki Osaragi, Tetsuji Anai
Принадлежит: Topcon Corp

A rotation angle detecting apparatus comprises a shaft portion space formed in a rotation shaft, a bearing holder space, a first condenser lens, a second condenser lens to face the first condenser lens, a detection pattern provided at a focal position of one of the first condenser lens and the second condenser lens, an image sensor provided at a focal position of the other of the first condenser lens and the second condenser lens, and an arithmetic unit for calculating an angle displacement of the rotation shaft. The arithmetic unit carries out a total circumferential scanning, extracts a frequency component, carries out a scanning of a reference designation pattern, and calculates the angle displacement of the rotation shaft based on a phase difference of the frequency component and the number of frequencies corresponding to a change in a position of the reference designation pattern.

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Номер записи: 61
31-10-2013 дата публикации

ENCODER, LENS APPARATUS, AND CAMERA

Номер: US20130286194A1
Автор: Horiguchi Haruhiko, Igaki Masahiko, Nagura Chihiro
Принадлежит: CANON KABUSHIKI KAISHA

An encoder () includes a cylindrical body (), a sensor unit () configured to detect a displacement of the cylindrical body () in a circumferential direction of the cylindrical body (), and a scale () that is attached to the cylindrical body () using a holder () and a holder () and that has a signal detection effective region () used to detect the displacement by the sensor unit (), and a region () that has a stiffness smaller than a stiffness of the signal detection effective region () in the circumferential direction of the cylindrical body () is provided on an outside of the signal detection effective region () and on at least one side of the first holder () and the second holder (). 1. An encoder comprising:a cylindrical body;a detector configured to detect a displacement of the cylindrical body in a circumferential direction of the cylindrical body; anda scale that is attached to the cylindrical body using a first holder and a second holder and that has a signal detection effective region used to detect the displacement by the detector,wherein a region that has a stiffness smaller than a stiffness of the signal detection effective region in the circumferential direction of the cylindrical body is provided on an outside of the signal detection effective region and on at least one side of the first holder and the second holder.2. The encoder according to claim 1 , wherein the region that has the stiffness smaller than the stiffness of the signal detection effective region is an elastic member that is provided on at least one side of the first holder and the second holder of the scale.3. The encoder according to claim 1 , wherein the region that has the stiffness smaller than the stiffness of the signal detection effective region is configured so that the stiffness in the circumferential direction of a scale portion of at least one side of the first holder and the second holder of the scale is smaller than the stiffness of the signal detection effective region.4. ...

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Номер записи: 62
07-11-2013 дата публикации

ENCODER AND APPARATUS USING THE SAME

Номер: US20130292556A1
Автор: NAKAMURA Hitoshi
Принадлежит: CANON KABUSHIKI KAISHA

The encoder includes a scale having a first periodic pattern and a second periodic pattern, a sensor relatively movable with the scale. The sensor outputs in a first detection state a first periodic signal changing with a change period corresponding to the first periodic pattern and outputs in a second detection state a second periodic signal changing with a longer change period corresponding to the second periodic pattern than that of the first periodic signal. A processor calculates a position in a relative movement direction of the scale and sensor by using both the first and second periodic signals. The processor takes in the second periodic signal, the first periodic signal and the second periodic signal in this order at mutually different times, calculates phases of the second, first and second periodic signals at a specific time and calculates the position at the specific time by using the calculated phases. 1. An encoder comprising:a scale provided with a first periodic pattern and a second periodic pattern whose period is different from that of the first periodic pattern;a sensor relatively movable with the scale and switchable to a first detection state to read the first periodic pattern and a second detection state to read the second periodic pattern, the sensor being configured to output in the first detection state a first periodic signal that changes with a change period corresponding to the first periodic pattern and to output in the second detection state a second periodic signal that changes with a longer change period corresponding to the second periodic pattern than that of the first periodic signal; anda processor configured to calculate a position in a relative movement direction of the scale and sensor by using both the first and second periodic signals taken in from the sensor,wherein the processor is configured (a) to take in the second periodic signal, the first periodic signal and the second periodic signal in this order at mutually ...

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Номер записи: 63
07-11-2013 дата публикации

ENCODER AND APPARATUS USING THE SAME

Номер: US20130292557A1
Автор: NAKAMURA Hitoshi
Принадлежит: Canon Kaushiki Kaisha

The encoder includes a scale provided with first and second tracks, a sensor relatively movable with the scale and reading periodic patterns to output periodic signals, and a processor calculating a position in a relative movement direction of the scale and sensor by using the periodic signals. The first track includes first and second periodic patterns whose periods are mutually different, and the second track includes a third periodic pattern whose period is different from that of the second pattern and is an integral multiple or an integral fraction of that of the first periodic pattern. The processor calculates, by using a phase difference between the periodic signals corresponding to the first and third periodic patterns, the position in which a sensor reading error due to a relative displacement between the first and second tracks and the sensor is corrected. 1. An encoder comprising:a scale provided with a first track and a second track each including at least one of periodic pattern;a sensor relatively movable with the scale and configured to read the periodic patterns to output periodic signals having periods respectively corresponding to the read periodic patterns; anda processor configured to calculate a position in a relative movement direction of the scale and sensor by using the periodic signals,wherein the first track includes a first periodic pattern and a second periodic pattern whose periods are mutually different, and the second track includes a third periodic pattern whose period is different from that of the second pattern and is one of an integral multiple and an integral fraction of that of the first periodic pattern, andwherein the processor is configured to calculate, by using a phase difference between the periodic signals output from the sensor respectively corresponding to the first and third periodic patterns, the position in which a reading error of the sensor due to a relative displacement between the first and second tracks and the ...

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Номер записи: 64
07-11-2013 дата публикации

SCALE, VERNIER ENCODER AND APPARATUS USING THE SAME

Номер: US20130292558A1
Автор: Horiguchi Haruhiko
Принадлежит: CANON KABUSHIKI KAISHA

The scale for a vernier encoder including a sensor relatively movable with the scale in a first direction and configured to read periodic patterns provided in the scale. The scale includes first and second scale tracks each including multiple periodic patterns having mutually different periods in the first direction and being arranged parallel in a second direction. The multiple periodic patterns form, between the first and second scale tracks, multiple pairs of periodic patterns to be used for producing multiple periodic signals, each periodic signal being produced by vernier operation. In at least one of the first and second scale tracks, a first periodic pattern, which is used for producing a shortest period periodic signal among the multiple periodic signals, is provided closest to a boundary between the first and second scale tracks among the multiple periodic patterns. 1. A scale to be used for a vernier encoder including a sensor relatively movable with the scale in a first direction and configured to read periodic patterns provided in the scale , the scale comprising:a first scale track and a second scale track each including multiple periodic patterns (a) having mutually different periods in the first direction and (b) being arranged parallel in a second direction orthogonal to the first direction,wherein the multiple periodic patterns included in the respective first and second scale tracks form, between the first and second scale tracks, multiple pairs of periodic patterns to be used for producing multiple periodic signals having mutually different periods, each periodic signal being produced by vernier operation performed on output from the sensor that reads each pair of periodic patterns, andwherein, in at least one of the first and second scale tracks, a first periodic pattern of the multiple periodic patterns, which is used for producing a first periodic signal having a shortest period among the multiple periodic signals, is provided closest to a ...

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Номер записи: 65
14-11-2013 дата публикации

Distributed Optical Fibre Sensing

Номер: US20130301037A1
Автор: Handerek Vincent Andrei
Принадлежит:

There is disclosed a distributed optical fibre sensing system in which the sensor fibre comprises at least first and second waveguides used for separate sensing operations. The sensor fibre may be, for example, a double clad fibre having a monomade core and a multimode inner cladding. 1. A distributed optical fibre sensing system comprising:a sensor fibre comprising first and second waveguides extending together along the fibre, the first waveguide being a single mode waveguide and the second waveguide being a multi mode waveguide; andan interrogation system coupled to the sensor fibre and arranged to measure one or more physical parameters as a function of position along the sensor fibre by carrying out at least first and second sensing operations to detect properties of probe light backscattered within the first and second waveguides respectively.2. The system of wherein the first and second adjacent waveguides are waveguides of a double clad optical fibre in which the single mode waveguide is a single mode core of the double clad fibre.3. The system of wherein the first sensing operation utilizes Brillouin backscatter or Rayleigh scattering within the first claim 1 , single mode waveguide to detect properties of probe light backscattered within the first waveguide.4. The system of wherein the first sensing operation utilizes coherent Rayleigh backscatter within the first claim 3 , single mode waveguide.5. The system of wherein the interrogation system measures vibration using the first sensing operation.6. The system of wherein the second sensing operation utilizes Raman scattering within the second claim 1 , multimode waveguide to detect properties of probe light backscattered within the second waveguide.7. The system of in which the interrogation system is arranged to carry out the sensing operations each using at least one of Rayleigh scattering claim 1 , optical time domain reflectometry claim 1 , coherent or partially coherent optical time domain ...

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Номер записи: 66
21-11-2013 дата публикации

Transmission and reception unit and rotary encoder comprising same

Номер: US20130306845A1
Автор: David Hopp, Reinhold Mutschler, Stefan Basler
Принадлежит: SICK STEGMANN GMBH

The invention relates to a transmission and reception unit for the detection of an angle of rotation comprising a light transmitter ( 20 ), a light receiver ( 22 ) and a transparent support ( 24 ) which is arranged therebetween and which lies areally on the light receiver ( 22 ) and covers it, wherein the light transmitter ( 20 ) is attached to the support ( 24 ) and irradiates in a direction ( 28 ) away from the light receiver ( 20 ), wherein the light transmitter ( 2 ) is arranged centrally above the light receiver ( 22 ) such that received light ( 32 ) can be incident past the light transmitter ( 22 ) on the light receiver ( 32 ) and to a rotary encoder comprising such a unit.

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Номер записи: 67
21-11-2013 дата публикации

ENCODER, OPTICAL MODULE, AND SERVO SYSTEM

Номер: US20130306849A1
Автор: MATSUTANI Yasuhiro, MURAOKA Jiro, YOSHIDA Yasushi, YOSHIDOMI Shirou
Принадлежит: KABUSHIKI KAISHA YASKAWA DENKI

This disclosure discloses an encoder. The encoder includes a slit array and an optical module. The optical module includes a point light source and a light receiving array comprising a plurality of light receiving elements arranged side by side along the measurement axis and arranged around the point light source in a plane parallel to the slit array, the light receiving elements being respectively receiving light irradiated from the point light source and reflected from the reflection slit. The light receiving array includes a first light receiving array and a second light receiving array. The point light source, the first light receiving array and the second light receiving array are arranged in the manner that a shortest distance between the point light source and the first light receiving array is smaller than a shortest distance between the point light source and the second light receiving array. 1. An encoder comprising:a slit array comprising a plurality of reflection slits arranged side by side along a measurement axis; andan optical module capable of relatively moving on the measurement axis with respect to the slit array while facing part of the slit array,the optical module comprises:a point light source configured to irradiate the part of the slit array with light; anda light receiving array comprising a plurality of light receiving elements arranged side by side along the measurement axis and arranged around the point light source in a plane parallel to the slit array, the light receiving elements being respectively receiving light irradiated from the point light source and reflected from the reflection slit,the light receiving array includes:a first light receiving array configured to receive reflection light from the slit array comprising an incremental pattern in the measurement axis direction and to output an incremental signal; anda second light receiving array configured to receive reflection light from the slit array comprising an absolute ...

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Номер записи: 68
21-11-2013 дата публикации

INDEXED OPTICAL ENCODER, METHOD FOR INDEXING AN OPTICAL ENCODER, AND METHOD FOR DYNAMICALLY ADJUSTING GAIN AND OFFSET IN AN OPTICAL ENCODER

Номер: US20130306850A1
Автор: York Frederick
Принадлежит: FARO TECHNOLOGIES INC.

An optical encoder may include an encoder disk, an illumination system, and a detector to detect light diffracted from the encoder disk. The encoder disk may include a signal track comprising a diffraction grating, and an index track comprising a reflective index mark, wherein a width of the index mark is larger than a pitch of the diffraction grating. An indexing method may include providing an encoder disk, providing an illumination system to direct light to the encoder disk, providing a detector structured to detect light diffracted from the encoder disk, calculating an estimated count of quadrature states from a rising edge of an index pulse to a middle of the index interval, and calculating the quadrature state at an approximate center of the index pulse. A dynamic parameter correction method may include calculating a target gain and offset and correcting values based on the target gain and offset. 1. An encoder disk for use in an optical encoder , the encoder disk comprising:a signal track comprising a diffraction grating formed as a ring on the encoder disk;an index track comprising a reflective index mark, wherein a width of the index mark is larger than a pitch of the diffraction grating;a glass substrate;a low reflective layer provided on the substrate; anda high reflective layer provided on the low reflective layer, wherein the high reflective layer is formed in a pattern such that a portion of the low reflective layer is visible.2. The encoder disk of claim 1 , wherein the low reflective layer comprises a low reflective chrome layer.3. The encoder disk of claim 1 , wherein the high reflective layer comprises a high reflective chrome layer.4. The encoder disk of claim 1 , wherein the low reflective layer has a reflectivity of approximately 5% on a side opposite the glass substrate.5. The encoder disk of claim 1 , wherein the high reflective layer has a reflectivity of approximately 59% on a side face the glass substrate and a reflectivity of approximately ...

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Номер записи: 69
05-12-2013 дата публикации

OPTICAL ENCODER

Номер: US20130320201A1
Автор: Hirai Takashi, Musha Takeshi, Nakajima Hajime, NOGUCHI Takuya, TATEI YOSHINAO
Принадлежит: Mitsubishi Electric Corporation

An optical encoder includes: an optical scale having periodical optical patterns and can be relatively and angularly displaced; a projector for irradiating the optical scale with light; a light receiver for receiving light from the optical scale; and a calculator for calculating an absolute rotation angle θ of the optical scale in accordance with a signal from the light receiver. The optical patterns include a plurality of light shielding portions and a plurality of light transmitting portions, each of the portions being located alternately. When a pitch of an n-th light shielding portion in a predetermined circumferential direction is denoted by Pn and a width of the n-th light shielding portion is denoted by Wn, a transmissivity T(θn) corresponding to an angle θn of the n-th light shielding portion and the pitch Pn of the light shielding portion satisfy predetermined equations, and the width Wn of the light shielding portion in the optical pattern varies in accordance with a function of the pitch Pn of the light shielding portion. 2. (canceled) The present invention relates to an optical encoder for detecting an absolute rotation angle of an optical scale.In general, a rotary encoder for detecting a rotation angle of an object to be measured includes an optical scale having bright and dark optical patterns, a detecting element for detecting the optical patterns on the optical scale, and a calculator disposed at a subsequent stage of the detecting element, wherein the calculator detects a rotation angle of the optical scale that is coupled to a rotary shaft of a motor or the like.As this type of rotary encoder, there are known an incremental system in which the calculator detects a rotation angle by accumulating pulse signals outputted from the detecting element, and an absolute system in which the calculator detects an absolute angle of the optical scale in accordance with the angularly unique optical patterns on the optical scale. In the incremental system, since ...

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Номер записи: 70
05-12-2013 дата публикации

Optical Power Modulation Vital Sign Detection Method and Measurement Device

Номер: US20130324860A1
Автор: John A. Borgos, Thomas A. Borgos, Troy Pongratz
Принадлежит: TARILIAN LASER TECHNOLOGIES Ltd, Tarillian Laser Technologies Ltd

A vital sign measurement device includes a sensor fixation device, a sensor frame, an optical sensing system, and an output unit. The sensor fixation device is adapted to be placed against an anatomical location of a subject. The optical sensing system includes an optical waveguide, an optical source device to supply optical energy to the optical waveguide, and an optical detector to detect an amount of optical energy exiting the optical waveguide. The optical sensing system is adapted to sense an arterial pulse from the compression or flexing of at least a portion of the optical waveguide resulting in reduction of the amount of light exiting the optical waveguide. The output unit is configured to receive a signal indicative of the amount of light exiting the optical waveguide and to generate a measure of the vital sign based at least in part on the received signal.

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Номер записи: 71
05-12-2013 дата публикации

Shape sensing device-specific

Номер: US20130325387A1
Автор: Bharat RAMACHANDRAN, Christopher Stephen Hall, Raymond Chan, Robert Manzke
Принадлежит: Koninklijke Philips NV

A medical instrument, system and method for calibration are provided. The instrument includes a body ( 202 ) and a shape sensing system ( 204 ) coupled to the body to permit determination of a shape of the body. A memory element ( 205, 206 ) is coupled to the body and configured to store data associated with calibration of the body, the data being readable through a cable ( 210 ) connectable to the body so that the data permits calibration of the body.

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Номер записи: 72
12-12-2013 дата публикации

OPTICAL ENCODER AND LENS FIXING MECHANISM THEREOF

Номер: US20130327930A1
Автор: Kawada Hiroaki, Ono Kimitoshi
Принадлежит:

An optical encoder includes a detection head. The detection head includes an optical system including a lens including a pair of bosses integrally formed with the lens and disposed with an optical axis of the lens therebetween, and an aperture plate having a pair of reference-pin-insertion holes disposed with an aperture therebetween; a housing including a pair of attachment portions and having a pair of lens-boss-insertion holes and a pair of reference-pin-insertion holes disposed on a central symmetry plane; a lens holder having a pair of lens-boss-insertion holes and a pair of reference-pin-insertion holes disposed on the central symmetry plane; and a pair of reference pins for positioning the lens holder and the aperture plate relative to the housing. An optical axis of the optical system is adjusted with respect to the bosses and the reference pins. 1. An optical encoder comprising:a scale having a track; and [ a lens including a pair of bosses that are integrally formed with the lens, the bosses being disposed with an optical axis of the lens therebetween, and', 'an aperture plate having a pair of reference-pin-insertion holes that are disposed with an aperture therebetween,, 'an imaging optics including'}, 'a housing having a pair of lens-boss-insertion holes and a pair of reference-pin-insertion holes that are disposed on a central symmetry plane, the housing including a pair of attachment portions that are disposed so as to be symmetrical with each other,', 'a lens holder having a pair of lens-boss-insertion holes and a pair of reference-pin-insertion holes that are disposed on the central symmetry plane,', 'a pair of reference pins for positioning the lens holder and the aperture plate relative to the housing, and', 'a light-receiving element on which the imaging optics forms an image of the track,, 'a detection head for detecting the track, the detection head including'}wherein an optical axis of the imaging optics is adjusted with respect to the bosses ...

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Номер записи: 73
19-12-2013 дата публикации

POSITION MEASURING INSTRUMENT

Номер: US20130334409A1
Автор: Oberhauser Johann, Tovar Heinz
Принадлежит:

A position measuring instrument including a code carrier having first and second code tracks, each including an identical series of code elements, wherein each of the series of code elements has two subregions with complementary properties. A scanning unit having detectors for scanning code elements, wherein each of the code elements defines one corresponding code word, wherein each of the code words defines an absolute position in the measuring direction, and wherein the detectors form a corresponding scanning signal from each of the two subregions of the series of code elements. An evaluation unit generating one item of code information for each of the series of code elements from each corresponding scanning signal, and forming the corresponding code words from the one item of code information, wherein each of the code words is composed of N and K items of code information from successive code elements of the first and second code tracks, respectively, with N and K being greater than 1. 1. A position measuring instrument , comprising: a first code track comprising a first series of code elements, wherein each of said series of code elements comprises two subregions with associated complementary properties, which are disposed in succession in a measuring direction;', 'a second code track extending parallel to said first code track and comprising a second series of code elements that is the same as said first series of code elements;, 'a code carrier comprisinga scanning unit comprising a plurality of detectors for scanning code elements, wherein each of said code elements defines one corresponding code word, wherein each of said code words defines an absolute position in said measuring direction, and wherein said plurality of detectors form a corresponding scanning signal from each of said two subregions of said series of code elements;an evaluation unit comprising a structure for generating one item of code information for each of said series of code elements from ...

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Номер записи: 74
26-12-2013 дата публикации

Encoder Device for Optical Detection of Movement or Position

Номер: US20130341499A1
Автор: Andreason Per
Принадлежит:

An encoder device for optical detection of movement or position includes a first terminal for delivery of an electric measurement code signal. The encoder device further includes a first printed circuit board, a detector mounted on the first printed circuit board, and a code device provided with a pattern. The detector and the code device are displaceable relative to each other, wherein the detector is adapted to generate the electric measurement code signal in dependence on the relative displacement. The detector includes at least one light-sensitive semiconductor chip having a first light-sensitive chip surface and a second chip surface on opposing sides. The first light-sensitive chip surface has a first chip contact area for an electrical connection. The encoder device further includes a second printed circuit board positioned between the detector and the code device, wherein the second printed circuit board is shaped so as to allow the passage of light from the code device to the first light-sensitive chip surface. The second printed circuit board has a first PCB contact area connected to the terminal, wherein the first PCB contact area is connected to the first chip contact area by solder, electrically conducting glue, ohmic contact, etc. 1. An encoder device for optical detection of movement and/or position , comprising:a first terminal adapted to deliver an electric measurement code signal;a first printed circuit board;a code device including a pattern;a detector mounted on said first printed circuit board, the detector and the code device displaceable relative to each other, the detector adapted to generate an electric measurement code signal in accordance with relative displacement between the detector and the code device, the detector including at least one light-sensitive semiconductor chip having a first light-sensitive chip surface and a second chip surface on opposing sides, the first light-sensitive chip surface having a first chip contact area ...

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Номер записи: 75
02-01-2014 дата публикации

OPTOELECTRONIC ROTARY ENCODER

Номер: US20140001349A1
Автор: Reime Gerd
Принадлежит:

An optoelectronic rotary encoder for setting or regulating parameters comprises a first measuring arrangement having a plurality of first light sources (), which are arranged on an imaginary closed line and emit light beams in a clocked manner, time-sequentially, and a first receiver () for receiving a first light beam emitted by at least one of the first light sources and reflected by an object. An evaluation device evaluates the light received by the receiver () and converted into electrical signals and determines therefrom a position of the object relative to the rotary encoder. A further measuring arrangement is provided for the identification of additional information likewise by means of the evaluation device. The further measuring arrangement has a further light source () and a further receiver () for receiving a further light beam emitted by the further light source () and reflected at the object. A shading element () permits the passage of the first light beams of the first measuring arrangement to and from a first location ()—assigned to the imaginary closed line—of an operating surface () and passage of the further light beams of the further measuring arrangement to and from a further location () of the operating surface () in each case with reflection of the light beams into the receivers (). A simple and expedient rotary encoder is thus provided which can also be used in safety-relevant areas. 18-. (canceled)10. A rotary encoder in accordance with claim 9 , wherein the first location on the control surface surrounds the further location that is central and punctiform on the control surface in ring-like manner.11. A rotary encoder in accordance with claim 9 , wherein the first light sources comprise a plurality of groups of similarly connected light sources which are arranged on a circular line forming the closed line claim 9 , wherein the light sources within a group are arranged at the same angular distance from each other and wherein the groups of ...

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Номер записи: 76
02-01-2014 дата публикации

ENCODER, LENS APPARATUS, AND CAMERA CAPABLE OF DETECTING POSITION OF OBJECT

Номер: US20140002717A1
Автор: Noguchi Kazuhiro
Принадлежит:

An encoder includes a cylinder configured to be rotatable in a circumferential direction, a scale attached to the cylinder, and a detector configured to detect a position of the cylinder by using the scale, and the cylinder includes a fixed holder holding the scale, a scale holder configured to be movable in the circumferential direction of the cylinder and holding the scale, and a scale biasing portion configured to bias the scale via the scale holder toward a side of the fixed holder so that the scale is attached to an inner wall of the cylinder. 1. An encoder comprising:a cylinder configured to be rotatable in a circumferential direction;a scale attached to the cylinder; anda detector configured to detect a position of the cylinder by using the scale,wherein the cylinder includes:a fixed holder holding the scale,a scale holder configured to be movable in the circumferential direction of the cylinder and holding the scale, anda scale biasing portion configured to bias the scale via the scale holder toward a side of the fixed holder so that the scale is attached to an inner wall of the cylinder.2. The encoder according to claim 1 , wherein the scale holder includes a radial direction limiting portion that limits a movement of the scale in a radial direction of the cylinder in a holding state of the scale claim 1 , and the scale holder is movable to a release position where a limitation of the scale by the radial direction limiting portion is released.3. The encoder according to claim 1 ,wherein the scale holder includes a first groove that is formed in the circumferential direction,wherein the cylinder includes a second groove that is formed in the circumferential direction, andwherein a ball movable along the first groove and the second groove is provided between the first groove and the second groove.4. The encoder according to claim 1 , wherein the scale biasing portion is a coil spring.5. A lens apparatus comprising:a lens configured to be movable in an optical ...

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Номер записи: 77
23-01-2014 дата публикации

OPTICAL ENCODER, MOTOR APPARATUS, AND METHOD FOR PROCESSING SIGNAL OF OPTICAL ENCODER

Номер: US20140021341A1
Автор: NAGAE Noriyuki
Принадлежит:

An optical encoder includes a to-be-detected medium including slits to reflect and transmit light. An optical source radiates light to the to-be-detected medium. A photodetector detects the light reflected by the slits or transmitted through the slits, and generates an electrical signal corresponding to an amount of the detected light. The correction value storage stores an offset correction value used to eliminate or reduce an offset component contained in the electrical signal. The adjustor adjusts an amount of the radiated light or the offset correction value so that a ratio between the offset correction value and the amount of the radiated light is approximately constant. The signal corrector corrects the electrical signal corresponding to the amount of the adjusted light, or corrects the electrical signal using the adjusted offset correction value. The position detector detects a position of the to-be-detected medium. 1. An optical encoder comprising:a to-be-detected medium comprising slits arranged at predetermined intervals to reflect and transmit light;an optical source configured to radiate light to the to-be-detected medium;a photodetector configured to detect the light radiated from the optical source and reflected by the slits or transmitted through the slits, and configured to generate an electrical signal corresponding to an amount of the light that has been detected;a correction value storage storing an offset correction value used to eliminate or reduce an offset component contained in the electrical signal;an adjustor configured to adjust at least one of an amount of the light radiated from the optical source and the offset correction value in accordance with at least one of the electrical signal and a moving velocity of the to-be-detected medium so that a ratio between the offset correction value and the amount of the light radiated from the optical source is approximately constant;a signal corrector configured to correct, using the offset ...

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Номер записи: 78
23-01-2014 дата публикации

ENCODER

Номер: US20140021342A1
Автор: Kato Yoshiaki
Принадлежит:

An encoder includes a light receiving part and a computing part. The light receiving part receives reflected light from a scale and outputs N-phase sinusoidal signals in which respective phases of fundamental waves differ by 2π/N (N is an integer more than or equal to 5). The computing part outputs a two-phase sinusoidal signal including an A phase and a B phase according to each of the N-phase sinusoidal signals. The A phase is expressed by a real part of sum of multiplier of N-phase sinusoidal waves and a member including the N. The B phase is expressed by an imaginary part of the sum of the multiplier of the N-phase sinusoidal waves and a member including the N. 3. The encoder according to claim 2 , whereinN>h+2 is satisfied in the Formula (II).4. The encoder according to claim 2 , wherein:the N-phase sinusoidal signal is an eight-phase sinusoidal signal including first to eighth sinusoidal signals; andthe second to eighth sinusoidal signals respectively correspond to the cases of m=0 to 7.5. The encoder according to claim 4 , wherein a first subtracter configured to output a signal in which a second signal is subtracted from a first signal;', 'a second subtracter configured to output a signal in which the second signal is subtracted from a third signal;', 'a third subtracter configured to output a signal in which a fourth signal is subtracted from the third signal;', 'a fourth subtracter configured to output a signal in which the fourth signal is subtracted from the first signal;', 'a first adder configured to add the first sinusoidal signal to an output signal of the first subtracter;', 'a second adder configured to add the third sinusoidal signal to an output signal of the second subtracter;', 'a third adder configured to add the fifth sinusoidal signal to an output signal of the third subtracter;', 'a fourth adder configured to add the seventh sinusoidal signal to an output signal of the fourth subtracter;', 'a fifth subtracter configured to output a signal ...

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Номер записи: 79
23-01-2014 дата публикации

METHOD AND DEVICE FOR DETECTING THE POSITION OF A CONVEYOR

Номер: US20140022562A1
Автор: CORSICO PICCOLINO Alessandro
Принадлежит: COMELZ S.P.A

A method for detecting the position of a conveyor, comprising the steps of: providing on the conveyor belt an irregular marking, constituted by marks and the like that are detectable optically; by means of a vision device, detecting portions of the marking at preset time intervals; comparing a detection performed by the vision device with a previously performed detection, in order to determine the extent and direction of the movement. 110-. (canceled)11. A method for detecting the position of a conveyor , comprising the steps of:providing on said conveyor an irregular marking, constituted by marks and the like that are detectable optically;by means of a vision device, detecting portions of said marking at preset time intervals;comparing a detection performed by said vision device with a previously performed detection, in order to determine the extent and direction of said movement.12. The method according to claim 11 , wherein said irregular marking comprises repeated marking portions on said conveyor.13. The method according to claim 11 , wherein said irregular marking comprises portions repeated at a distance that is not shorter than the extension of the viewing field of said vision system.14. The method according to claim 12 , wherein said step of detection of said marking portions by the vision system is performed with a high frequency.15. The method according to claim 11 , wherein said step of detection of portions of said marking is preceded by a step of detection of all of said marking in order to obtain a complete mapping of said marking.16. The method according to claim 15 , further comprising the step of comparing said detected marking portion with said complete mapping of the marking of the conveyor.17. A system for detecting the position of a conveyor claim 15 , comprising a conveyor and a vision system arranged above said conveyor claim 15 , wherein said conveyor comprises an irregular marking on its upper surface.18. The system according to claim 17 , ...

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Номер записи: 80
06-02-2014 дата публикации

TRANSMISSION AND RECEPTION UNIT AND ROTARY ACTUATOR HAVING THE SAME

Номер: US20140034819A1
Автор: HOPP David, MUTSCHLER Reinhold
Принадлежит: SICK STEGMANN GMBH

The invention relates to a transmission and reception unit for the detection of a rotary angle, having a light transmitter for the transmission of transmitted light to a dimensional scale and having a light receiver which lies on a support, the light receiver having a front side for the reception of reception light influenced by a dimensional scale disposed opposite the front side and having a rear side which is supported on a support transparent for the transmitted light. In order to provide a new assembly concept for the positioning of the light source and of the receiver and in particular to provide an arrangement which is as symmetrical as possible it is suggested that the transparent support is arranged between the light receiver and the light transmitter and that a light deflection apparatus is provided for the deflection of the transmitted light. 12022242630282432223022302620262527. A transmission and reception unit for the detection of a rotary angle comprising a light transmitter () for the transmission of transmitted light () to a dimensional scale (); a light receiver () which lies on a support () , the light receiver having a front side for the reception of reception light () influenced by a dimensional scale () disposed opposite the front side , the light receiver having a rear side which faces the light transmitter; and a light deflection apparatus () for the deflection of the transmitted light () , wherein the support () is of transparent design for the transmitted light () and the support serves as a circuit support () and supports electrical connections to the light receiver (); with the light transmitter () and the light receiver () being arranged with regard to one another such that their respective optical axes ( and ) are collinear.2. The transmission and reception unit in accordance with claim 1 , wherein the rear side of the light receiver lies on the transparent support claim 1 , the transparent support being arranged between the light ...

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Номер записи: 81
06-02-2014 дата публикации

POSITION MEASURMENT APPARATUS FOR MEASURING POSITION OF MOBILE OBJECT ON THE BASIS OF REFELECTED WAVE

Номер: US20140036265A1
Автор: Inomata Kenji, Shikai Masahiro, TSUJITA Wataru, Watanabe Masahiro
Принадлежит: Mitsubishi Electric Corporation

A reflector apparatus includes reflectors, which respectively radiate reflected waves in predetermined polarization directions. A polarized wave information reading circuit fixed to a moving body radiates a radio wave toward the reflecting apparatus from a transmitting antenna, receives reflected waves from the reflecting apparatus, and generates a received level difference signal that corresponds to a polarization direction of the received reflected waves. A position calculating circuit calculates a position of the polarized wave information reading circuit based on the received level difference signal. 1. A position measurement apparatus comprising:reflecting means having a plurality of reflectors, that are configured to be arranged at a predetermined reflector interval along a predetermined transfer pathway of a mobile object, and to radiate radio waves by reflecting reflected waves in respective predetermined polarization directions when predetermined radio waves are incident thereon; andposition detecting means configured to detect a position of the mobile object in the transfer pathway,wherein the position detecting means comprises:at least one polarized wave information reading means configured to radiate the radio waves from the mobile object toward the reflecting means, receive a reflected wave from the reflecting means, and generate a polarization state signal corresponding to the polarization direction of the received reflected wave; andposition calculating means configured to calculate the position of the mobile object on the transfer pathway, on the basis of at least one polarization state signal from at least one of the polarized wave information reading means.2. The position measurement apparatus as claimed in claim 1 ,wherein the plurality of reflectors of the reflecting means are provided so that the polarization directions of reflected waves from each pair of reflectors adjacent to each other become different from each other,wherein the position ...

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Номер записи: 82
13-02-2014 дата публикации

OPTICAL ROTARY ENCODER AND CORRECTION METHOD THEREFOR

Номер: US20140042308A1
Автор: Kobayashi Taizan, Shirai Katsuki, Takada Eiji
Принадлежит: FUJITSU LIMITED

An optical rotary encoder includes a light source, a rotation body including a reflecting diffraction grating, a light receiving unit including a plurality of light receiving elements, a synthetic unit that combines output signals output from the plurality of light receiving elements to obtain a signal, which represents a fringe pattern component at a certain cycle, included in a light reflected by the reflecting diffraction grating and, and a detection unit that detects a direction based on a first signal and a second signal, the direction being a direction in which a distance between the rotation body and the light receiving unit varies, the first signal and the second signal being obtained by the synthetic unit, the first signal indicating a fringe pattern component having a cycle shorter than the certain cycle, the second signal indicating a fringe pattern component having a cycle longer than the certain cycle. 1. An optical rotary encoder comprising:a light source that emits light;a rotation body that includes a reflecting diffraction grating, the reflecting diffraction grating including a certain-periodic structure;a light receiving unit that includes a plurality of light receiving elements, each of the plurality of light receiving elements outputs an output signal corresponding to an amount of received light;a synthetic unit that combines output signals output from the plurality of light receiving elements which receive respective lights, the respective lights being emitted from the light source and reflected by the reflecting diffraction grating, the synthetic unit obtaining a signal that is included in the reflected light and represents a fringe pattern component at a certain cycle; anda detection unit that detects a direction based on a first signal and a second signal, the direction being a direction in which a distance between the rotation body and the light receiving unit varies, the first signal and the second signal being obtained by the synthetic ...

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Номер записи: 83
13-02-2014 дата публикации

ENCODER, LENS APPARATUS, AND CAMERA CAPABLE OF DETECTING POSITION OF OBJECT

Номер: US20140043526A1
Автор: Noguchi Kazuhiro
Принадлежит: CANON KABUSHIKI KAISHA

An encoder includes a base, a cylinder rotatable in a circumferential direction with respect to the base, at least three supporting portions rotatably supporting the cylinder with respect to the base, a connecting portion provided on the cylinder and rotatable within a first range between two supporting portions of the at least three supporting portions, a scale attached to the cylinder, and a detector configured to detect a position of the cylinder with respect to the base by using the scale, and the detector is arranged within a second range different from the first range. 1. An encoder comprising:a base;a cylinder rotatable in a circumferential direction with respect to the base;at least three supporting portions rotatably supporting the cylinder with respect to the base;a connecting portion provided on the cylinder and rotatable within a first range between two supporting portions of the at least three supporting portions;a scale attached to the cylinder; anda detector configured to detect a position of the cylinder with respect to the base by using the scale,wherein the detector is arranged within a second range different from the first range.2. The encoder according to claim 1 , wherein a first position within the first range and a second position within the second range are symmetric to each other with respect to a center of the cylinder.3. The encoder according to claim 1 , wherein at least one of the supporting portions includes a rotating portion that rotates with respect to the base and a biasing portion that biases the rotating portion in a direction of the base.4. The encoder according to claim 1 ,wherein the cylinder is an injection-molded product having an inner wall of the cylinder that is formed by using a slide mold for an inside diameter, andwherein each of regions of the inner wall of the cylinder where the at least three supporting portions limit a position of the cylinder is formed by one slide core of the slide mold for the inside diameter.5. ...

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Номер записи: 84
20-02-2014 дата публикации

Frame foot loading measurement system using fiber optic sensing technique

Номер: US20140047926A1
Автор: David A. Reed, Evangelos V. Diatzikis, Jonathan R. Anderson
Принадлежит: Siemens Energy Inc

A fiber Bragg grating (FBG) based sensor is used as a strain sensing element to determine frame foot loading of a generator. Three FBGs may be used in tandem to form a basic Frame Foot Loading Module (FFL Module). Two modules are fixed on each vertical support gusset at the corner of the generator frame, with one module on the front of the gusset and a second module on the back of the gusset. Thus, each gusset may be instrumented with six FBG strain gauges or sensors. The gussets are chosen on each of the four corners of the generator. For two-pole generators the first three gussets at each corner may be used and, for four-pole generators the first four gussets may be used.

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Номер записи: 85
20-02-2014 дата публикации

IMPACT SENSOR OF ACTIVE HOOD SYSTEM

Номер: US20140050438A1
Автор: HWANG In
Принадлежит:

An impact sensor of an active hood system includes a rear member, optical fiber sensors, a front member and membrane switch. Each of the optical fiber sensors is disposed on upper and lower portions of a front of the rear member and senses an impact force delivered from a bumper at the time of a crash with a pedestrian. The front member is disposed at the front of the rear member and has a protrusion part pressing the optical fiber sensors by the impact force delivered from the bumper at the time of the crash with the pedestrian. The membrane switch is disposed between the front member and the optical fiber sensor, divided into a plurality of regions from a left of the front member to a right thereof, and configured to sense a region which is pressed when the pedestrian crashes with the region. 1. An impact sensor of an active hood system disposed between an energy absorber and a back beam disposed in a bumper to sense an impact force at the time of a crash with a pedestrian , the impact sensor comprising:a rear member disposed at a front of the back beam;optical fiber sensors each disposed on upper and lower portions of a front of the rear member and configured to sense an impact force delivered from the bumper at the time of the crash with the pedestrian;a front member disposed at the front of the rear member and having a protrusion part configured to press the optical fiber sensors by the impact force delivered from the bumper at the time of the crash with the pedestrian; anda membrane switch disposed between the front member and the optical fiber sensor, divided into a plurality of regions from a left of the front member to a right thereof, and configured to sense, as a crashing position of the pedestrian, a region which is pressed when the pedestrian crashes with the region.2. The impact sensor according to claim 1 , wherein the rear member and the front member are disposed to be connected from a left of the back beam to a right thereof.3. The impact sensor ...

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Номер записи: 86
20-02-2014 дата публикации

Sagnac interferometer event sensing and locating device

Номер: US20140050473A1
Автор: Mike McNeilly, Scott V. Johnson
Принадлежит: Cleveland Electric Laboratories Co

A Sagnac interferometer event sensing device is disclosed herein. The device includes a first light source operable to emit a first light beam. The device also includes a second light source operable to emit a second light beam. The device also includes an optical fiber path including a first portion along which only the first light beam travels, a second portion along which only the second light beam from the second light source travels, and a third portion along which both of the first and second light beams travel. The device also includes a first detector disposed at an end of the first portion of the optical fiber path to receive the first light beam. The device also includes a second detector disposed at an end of the second portion of the optical fiber path to receive the second light beam. The device also includes a first plurality of depolarizers disposed along the first portion of the optical fiber path. The device also includes a second plurality of depolarizers disposed along the second portion of the optical fiber path. The first and second light beams are at first and second, different characteristic wavelengths.

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Номер записи: 87
27-02-2014 дата публикации

Systems and methods for rotor angle measurement in an electrical generator

Номер: US20140055126A1
Автор: Charles L. Ramiller, Nicholas C. Seeley
Принадлежит: Schweitzer Engineering Laboratories Inc

Disclosed herein are systems and methods for rotor angle measurement in an electrical generator. According to one embodiment, an intelligent electronic device may comprise control logic configured to generate a reference signal and to generate a rotational position signal based upon an indicator of a rotational position of a rotor in an electrical generator. The control logic may further be configured to detect a relative shift between the reference signal and the rotational position signal and to determine the rotational position of the rotor based upon the relative shift. A power angle of the electrical generator may be calculated based upon the rotational position of the rotor. According to certain embodiments, the control logic may further be configured to generate a control instruction to reduce the power angle in response to determining that the power angle exceeds a threshold.

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Номер записи: 88
06-03-2014 дата публикации

Apparatus for measuring state variables

Номер: US20140061452A1
Автор: Wolfgang Schade
Принадлежит: Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV

An apparatus for measuring state variables with at least one fiber-optic sensor, containing at least one optical coupler, at least one filter element and at least one photoelectric converter, where the optical coupler, the filter element and the photoelectric converter are integrated on a substrate, and the filter element contains at least one Bragg grating which is designed to supply the light portion reflected by the Bragg grating to the photoelectric converter.

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Номер записи: 89
06-03-2014 дата публикации

DISTANCE INFORMATION ESTIMATING APPARATUS

Номер: US20140063235A1
Автор: Taya Kaori
Принадлежит: CANON KABUSHIKI KAISHA

To provide a method which can estimate a distance of a flat part while keeping a precision for estimating a distance in detail. Distance information is estimated by estimating each piece of distance information of an image represented by image data, and distance information represented by resolution-converted image data, and combining the distance information of the image and the distance information of the resolution-converted image. 1. A distance information estimating apparatus comprising:an acquiring unit configured to acquire image data and resolution-converted image data, the resolution-converted image data being obtained by converting a resolution of the image data;a distance information estimating unit configured to estimate distance information of an image represented by the image data and distance information of a resolution-converted image represented by the resolution-converted image data; anda distance information combining unit configured to combine the distance information of the image and the distance information of the resolution-converted image.2. The distance information estimating apparatus according to claim 1 , wherein the acquiring unit acquires two kinds or more of resolution-converted image data with two kinds or more of different resolutions claim 1 ,wherein the distance information estimating unit estimates the distance information of two kinds or more of the resolution-converted images, andwherein the distance information combining unit performs combination using the distance information of two kinds or more of the resolution-converted images.3. The distance information estimating apparatus according to claim 1 , wherein the distance information estimating unit estimates the distance information on the basis of camera information corresponding to the image data.4. The distance information estimating apparatus according to claim 1 , wherein the distance information combining unit combines the distance information on the basis of area ...

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Номер записи: 90
06-03-2014 дата публикации

Detection of seismic signals using fiber optic distributed sensors

Номер: US20140064028A1
Автор: Arthur H. Hartog, Colin A. Wilson, Dominic Brady, Douglas E. Miller, Francois M. Auzerais, Henry Menkiti, Ian David Richard Bradford, Richard T. Coates
Принадлежит: Schlumberger Technology Corp

A fiber optic distributed vibration system for detecting seismic signals in an earth formation is provided. The system includes a fiber optic cable deployed in a borehole that extends into the earth formation and which is configured to react along its length to a seismic wave incident on the fiber optic cable from outside the borehole. An optical source launches an optical signal into the fiber optic cable while the seismic wave is incident thereon. A receiver detects coherent Rayleigh noise (CRN) produced in response to the optical signal. A processing circuit processes the detected CRN signal to determine characteristics of the earth formation.

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Номер записи: 91
13-03-2014 дата публикации

TWO-DIMENSIONAL ABSOLUTE ENCODER AND SCALE

Номер: US20140070073A1
Автор: Ishizuka Ko, Ogasawara Makiko
Принадлежит: CANON KABUSHIKI KAISHA

A two-dimensional absolute encoder includes a scale having marks arranged thereon along first and second directions different from each other, a detector configured to perform first detection that detects rows of a first number of marks arranged in the first direction and second detection that detects rows of a second number of marks arranged in the second direction, and a processor configured to determine absolute positions of the scale in the first and second directions based on outputs from the detector. Each of the marks has one of different characteristic values each corresponding to a combination of a quantized first code for indicating a position in the first direction and a quantized second code for indicating a position in the second direction, the number of the different characteristic values being smaller than the number of the combinations. 1. A two-dimensional absolute encoder comprising:a scale having a plurality of marks arranged thereon along a first direction and a second direction different from each other;a detector configured to perform first detection that detects rows of a first number of marks arranged in the first direction and second detection that detects rows of a second number of marks arranged in the second direction; anda processor configured to determine absolute positions of the scale in the first direction and the second direction based on outputs from the detector,wherein each of the plurality of marks has one of a plurality of different characteristic values each corresponding to a combination of a quantized first code for indicating a position in the first direction and a quantized second code for indicating a position in the second direction, the number of the plurality of different characteristic values being smaller than the number of the combinations; andthe processor is configured to generate a first code sequence including the first number of the first codes based on a result of the first detection, determine an absolute ...

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Номер записи: 92
27-03-2014 дата публикации

Distributed sensing employing stimulated brillouin scattering in optical fibers

Номер: US20140083197A1
Автор: Avinoam ZADOK, Luc Thevenaz, Yair ANTMAN
Принадлежит: BAR ILAN UNIVERSITY

Disclosed are methods and devices for distributed sensing of a measurable parameter employing stimulated Brillouin scattering in an optical fiber. A frequency-modulated or phase-modulated light wave is transmitted into the optical fiber. A scattered light wave in the optical fiber is monitored for sensing a measurable parameter. In some embodiments, the calculating step may include calculating a distance of a sensed location along the optical fiber using the monitored time of arrival.

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Номер записи: 93
03-04-2014 дата публикации

SCALE FOR ROTARY ENCODER, METHOD OF INJECTION-MOLDING SAME, AND ROTARY ENCODER USING SAME

Номер: US20140091212A1
Автор: Fukuda Hideji, Sunada Takuya
Принадлежит:

In a radial optical path type rotary encoder, in order to be able to reduce deterioration of resolution and variation among products due to burrs during molding and/or rounding of a die, a scale for a rotary encoder is provided with a scale body which is formed substantially in a cylindrical shape, the scale body having a side surface portion in which a light transmitting portion through which light passes and a light blocking portion by which light with a predetermined width in a circumferential direction is blocked are formed alternately in the circumferential direction, wherein the side surface on a light-incident side of the light blocking portion is formed outside a light transmittable region having an outer edge defined by a light beam tangent to the side surface of the light blocking portion amidst the light passing through the light transmitting portion, in a lateral cross-section view. 1. A scale for a rotary encoder comprising a scale body which is formed substantially in a cylindrical shape or in a truncated conical shape , the scale body having a side surface portion in which a light transmitting portion through which light passes and a light blocking portion by which light with a predetermined width in a circumferential direction is blocked are formed alternately in the circumferential direction , whereinthe side surface on an inner peripheral side or outer peripheral side of the light blocking portion is formed outside a light transmittable region having an outer edge defined by a light beam tangent to the side surface of the light blocking portion amidst the light passing through the light transmitting portion, in a lateral cross-section view.2. The scale for the rotary encoder according to further comprising a frame part formed with an axial bore to which a rotating shaft is fitted claim 1 , wherein one end side of the side surface portion of the scale body is connected to the frame part claim 1 , and a light source and a light detector are provided ...

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Номер записи: 94
03-04-2014 дата публикации

ENCODER

Номер: US20140091213A1
Автор: Hasegawa Noriyasu, Okamuro Takashi, Omura Yoichi, Shamoto Kosuke
Принадлежит: Mitsubishi Electric Corporation

The encoder includes a plurality of position-detection-signal generation systems that generates electrical signals as position detection signals having different cycles, respectively; a first computing unit that calculates first position data based on the position detection signals generated by the position-detection-signal generation systems; a second computing unit that calculates second position data based on electrical signals generated by fewer ones of the position-detection-signal generation systems than in the first computing unit; and a failure determination unit that determines whether the encoder is defective based on a comparison between the first position data and the second position data. 1. An encoder for computing an intra-rotation position of a rotating body , the encoder comprising:a plurality of position-detection-signal generation systems for generating position detection signals related to the rotating body having different cycles, respectively, the position-detection signal generation systems including a position-detection-signal generation system that generates a position detection signal having one cycle with respect to one rotation of the rotating body;a first computing unit for calculating a first intra-rotation position based on the position detection signals generated by the position-detection-signal generation systems, respectively;a second computing unit for calculating a second intra-rotation position based on position detection signals generated by some of the plurality of the position-detection-signal generation systems and fewer than in the first computing unit; anda failure determination unit for determining whether its own encoder is defective based on a comparison between the first intra-rotation position and the second intra-rotation position,wherein the second computing unit calculates the second intra-rotation position based on the position detection signal generated by the position-detection-signal generation system that ...

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Номер записи: 95
03-04-2014 дата публикации

Reflective sensor for detection of material degradation

Номер: US20140092389A1
Автор: Boris Leonidovich Volodin, Grzegorz Drozdz, Uri Abrams, Vladimir Sinisa Ban
Принадлежит: PD LD Inc

A sensor for detecting material degradation may include an optical fiber and a housing through which the optical fiber extends. An end cap may be affixed to an end of the housing. Light provided through the optical fiber may be reflected off of the end cap back through the optical fiber. The end cap may be made of a material of interest, and may be situated in an environment wherein the material of interest is present. A light source may provide input light through the optical fiber. A portion of the input light may be reflected off of the end cap. A light receptor may receive the reflected light via the optical fiber. A processing unit may be adapted to compare a measured intensity of the reflected light to a threshold, and to initiate an alarm condition if the measured intensity is below the threshold.

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Номер записи: 96
06-01-2022 дата публикации

ELECTRIC DISCHARGE MACHINE AND SENSOR UNIT

Номер: US20220001474A1
Автор: Sakaguchi Masashi
Принадлежит: SODICK CO., LTD.

An electric discharge machine is provided. The electric discharge machine includes: an axis drive part moving a tool electrode in at least one axial direction; and a sensor unit detecting a linear movement position of the axis drive part in the axial direction. The sensor unit includes a measurement scale having a linear shape, a position detector scanning the measurement scale and obtaining position information, and a pair of adjustment blocks fixed to both ends of the measurement scale or the position detector and erected perpendicular to an extension direction of the measurement scale. The adjustment blocks are fixed to the axis drive part and are curved in the axial direction due to a temperature change. 1. An electric discharge machine , comprising:an axis drive part, configured to move a tool electrode in at least one axial direction; anda sensor unit, configured to detect a linear movement position of the axis drive part in the at least one axial direction, a measurement scale, having a linear shape;', 'a position detector, configured to scan the measurement scale and obtain position information; and', 'a pair of adjustment blocks, being fixed to both ends of the measurement scale or the position detector and erected perpendicular to an extension direction of the measurement scale,, 'wherein the sensor unit compriseswherein each of the pair of adjustment blocks is fixed to the axis drive part and is curved in the at least one axial direction due to a temperature change.2. The electric discharge machine according to claim 1 , wherein the axis drive part comprises:a base; anda moving body, being disposed to face the base and reciprocating in the at least one axial direction,wherein the measurement scale and the position detector are disposed to face each other with one fixed to the base and the other fixed to the moving body.3. The electric discharge machine according to claim 1 , whereineach of the pair of adjustment blocks comprises a first block and a second ...

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Номер записи: 97
05-01-2017 дата публикации

Rotating Camera Systems and Methods

Номер: US20170001577A1
Автор: Aich Sudipto, Seagraves Jamel
Принадлежит:

Example rotating camera systems and methods are described. In one implementation, an apparatus includes a motor having a camera mounting mechanism and configured to rotate a camera attached to the mounting mechanism. A communication module receives vehicle data from a vehicle. A rotation control module determines a current rotational orientation of the motor and determines a speed and direction to rotate the motor based on the received vehicle data 1. An apparatus comprising:a motor having a camera mounting mechanism and configured to rotate a camera mounted thereto;a communication module configured to receive vehicle data from a vehicle; anda rotation control module coupled to the motor and the communication module, the rotation control module configured to determine a current rotational orientation of the motor and determine a speed and direction to rotate the motor based on the received vehicle data.2. The apparatus of claim 1 , wherein the vehicle data includes at least one of a current steering angle of the vehicle claim 1 , a current vehicle speed claim 1 , a lateral acceleration claim 1 , a steering wheel rotation speed claim 1 , and a vehicle yaw rate.3. The apparatus of claim 1 , wherein a user of the vehicle determines an offset value further used by the rotation control module to determine the speed and direction to rotate the motor.4. The apparatus of claim 1 , wherein the rotation control module further determines the speed and direction to rotate the motor based on a desired orientation of the motor.5. The apparatus of claim 1 , further comprising an optical encoder coupled to the motor and the rotation control module claim 1 , the optical encoder configured to monitor a rotational position of the motor.6. The apparatus of claim 1 , wherein the rotation control module limits the rotation of the motor to a pre-defined range of orientations.7. The apparatus of claim 6 , wherein the pre-defined range of orientations is selected by a user of the camera.8. ...

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Номер записи: 98
06-01-2022 дата публикации

Phase measurement method, signal processing device, and program

Номер: US20220006521A1
Автор: Daisuke Iida, Hiroyuki Oshida, Keiji Okamoto, Yoshifumi Wakisaka
Принадлежит: Nippon Telegraph and Telephone Corp

It is an object to enable offline measurement with a high SN ratio of the phase of scattered light of an optical fiber to be measured in an optical receiving system for real-time measurement (direct measurement). The phase measurement method according to the present invention performs coherent detection of scattered light using a 90-degree optical hybrid, obtains an estimated quadrature component value by averaging a measured quadrature component value that is directly measured and a calculated quadrature component value obtained by Hilbert transforming a measured in-phase component value that is directly measured, obtains an estimated in-phase component value by averaging the measured in-phase component value and a calculated in-phase component value obtained by inverse Hilbert transforming the measured quadrature component value, and calculates the phase of scattered light based on the estimated quadrature component value and the estimated in-phase component value.

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Номер записи: 99
05-01-2017 дата публикации

Macro-micro composite grating ruler measuring system based on conversion and amplification in vertical and horizontal directions

Номер: US20170003147A1
Автор: Haidong YANG, Jian Gao, Meng Wang, Xin Chen, Youdun Bai, Zhijun Yang
Принадлежит: GUANGDONG UNIVERSITY OF TECHNOLOGY

The present disclosure relates to a macro-micro composite grating ruler measuring system based on conversion and amplification in vertical and horizontal directions. The macro-micro composite grating ruler includes a grating ruler, a macro-micro reading system moving with respect to the grating ruler, and a counting and image processing module. The macro-micro reading system faces grating strip datum and is parallel to the grating ruler. The system further includes a measuring reference line. The measuring reference line obtained by the image sensor together with grating strips forms an image overlap in the counting and image processing module. The measuring reference line and the grating strip jointly include an angle θ. With the foregoing configuration, the present invention is compatible with the existing incremental grating rulers and absolute grating rulers, so is highly applicable.

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Номер записи: 100