Мобильное устройство для определения угла наклона объекта

Может быть использована для ориентировки в пространстве ручного строительного инструмента. Содержит герметичную прозрачную сферу (1), заполненную жидкостью до образования индикаторного элемента в виде одного неразбиваемого пузырька воздуха (2), установочный участок (3), основание (4), мерительные шкалы (5), (6) и (7). Последние выполнены на внешней поверхности сферы (1) симметрично по отношению к соответствующим им диаметральным центральным окружностям (8), (9) и (10) и ограничены окружностями: мерительная шкала (5) - окружностями (11) и (12), мерительная шкала (6) - окружностями (13) и (14), а мерительная шкала (7) -окружностями (15) и (16). При этом мерительные шкалы (5), (6), (7) выполнены на сфере (1) таким образом, что плоскости (17), (18) и (19), образующие окружности (8), (9) и (10), соответственно, взаимно перпендикулярны. При установке установочного участка (3) в пазы типа «ласточкин хвост» основания (4), закрепленного на корпусе (20), плоскость (18) совпадает с плоскостью симметрии (21) ручного инструмента, плоскость (19) параллельна плоскости симметрии (22) ручного инструмента, а плоскость (17) параллельна плоскости (23) объекта обработки. Мерительные шкалы (5), (6) и (7) образуют зоны (24), (25), (26), (27), (28) и выполнены с делениями, которые позволяют ориентировать инструмент в пределах 210-270 градусов. При сверлении стены перпендикулярность сверла и стены выставляют визуально по пузырьку воздуха (2), который должен находиться в зоне (24). При сверлении пола - в зоне (26). При сверлении потолка - в зоне (25). Контролируют его местонахождение визуальным совмещением зоны (26) с зоной (25), которая просматривается через жидкость сферы (1). Упрощается контроль угла установки ручного строительного инструмента относительно объекта обработки. 7 з.п. ф-лы, 7 ил. ÐÎÑÑÈÉÑÊÀß ÔÅÄÅÐÀÖÈß (19) RU (11) 70 361 (13) U1 (51) ÌÏÊ G01C 9/36 (2006.01) ÔÅÄÅÐÀËÜÍÀß ÑËÓÆÁÀ ÏÎ ÈÍÒÅËËÅÊÒÓÀËÜÍÎÉ ÑÎÁÑÒÂÅÍÍÎÑÒÈ, ÏÀÒÅÍÒÀÌ È ÒÎÂÀÐÍÛÌ ÇÍÀÊÀÌ (12) ÎÏÈÑÀÍÈÅ ÏÎËÅÇÍÎÉ ÌÎÄÅËÈ Ê ...

Устройство определения азимута направления и местоположения

Полезная модель относится к области измерительной техники, в частности к гироскопическим приборам, радионавигации, топографии, и может быть использована при ориентировании на местности - определении азимутов направлений и координат, решении геодезических задач и т.п. Устройство определения азимута направления и местоположения содержит гироблок и подвижно соединенный с ним тахеометр, образующие гиротеодолит, при этом дополнительно введена спутниковая геодезическая аппаратура, содержащая приёмник двух или более частотных сигналов систем GPS/ГЛОНАСС и спутниковую антенну, которая соосно интегрирована в одном корпусе с гиротеодолитом. Техническим результатом заявленной полезной модели является совместное определение координат пункта установки и азимута направления. 1 ил. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 178 904 U1 (51) МПК G01C 1/00 (2006.01) G01S 19/13 (2010.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ПОЛЕЗНОЙ МОДЕЛИ К ПАТЕНТУ (52) СПК G01C 1/00 (2006.01); G01S 19/13 (2006.01) (21)(22) Заявка: 2017137539, 26.10.2017 (24) Дата начала отсчета срока действия патента: (73) Патентообладатель(и): Чернов Иван Владимирович (RU) Дата регистрации: 23.04.2018 (56) Список документов, цитированных в отчете о поиске: RU 104701 U1, 20.05.2011. UA 75648 C2, 15.05.2006. WO 2014055428 A2, 10.04.2014. EP 3228985 A1, 11.10.2017. (45) Опубликовано: 23.04.2018 Бюл. № 12 R U (54) Устройство определения азимута направления и местоположения (57) Реферат: Полезная модель относится к области гиротеодолит, при этом дополнительно введена измерительной техники, в частности к спутниковая геодезическая аппаратура, гироскопическим приборам, радионавигации, содержащая приёмник двух или более частотных топографии, и может быть использована при сигналов систем GPS/ГЛОНАСС и спутниковую ориентировании на местности - определении антенну, которая соосно интегрирована в одном азимутов направлений и координат, решении корпусе с гиротеодолитом. Техническим геодезических задач и ...

Шпиндельный узел повышенной точности углового компаратора

Полезная модель относится к области оптоэлектроники и может быть использована в измерительной технике, в точном машиностроении, приборостроении и других областях науки и промышленности при создании высокоточных углоизмерительных приборов и преобразователей угла поворота.Технический результат от заявляемого технического решения заключается в уменьшении погрешности калибровки базовых угловых датчиков шпиндельного узла компаратора до уровня, не превышающего ±0,03'', который гарантирует контроль топологии синтезируемых УИС с погрешностью не хуже ±0,3''.Заявляемый технический результат достигается за счет того, что в шпиндельном узле повышенной точности углового компаратора, содержащем соосно расположенные на общем вале предметный столик, первый измерительный диск с позиционно-считывающей головкой, роторный блок, двигатель вращения и второй измерительный диск с n позиционно-считывающими головками, где n≥2, расположенными равномерно по окружности диска, а также информационную считывающую головку, расположенную над предметным столиком, вертикальная ось которой параллельна оси шпинделя, на первом измерительном диске установлена по меньшей мере одна дополнительная позиционно-считывающая головка, а второй измерительный диск соединен с валом через узел сцепления/расцепления и подшипник вращения.Заявляемое техническое решение обеспечивает высокую точность измерений и позволяет производить калибрование самого прибора непосредственно в процессе работы. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 200 017 U1 (51) МПК G01C 1/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ПОЛЕЗНОЙ МОДЕЛИ К ПАТЕНТУ (52) СПК G01C 1/00 (2020.05) (21)(22) Заявка: 2020119723, 08.06.2020 (24) Дата начала отсчета срока действия патента: (73) Патентообладатель(и): Общество с ограниченной ответственностью АКРУС (ООО "АКРУС") (RU) Дата регистрации: 01.10.2020 (45) Опубликовано: 01.10.2020 Бюл. № 28 2 0 0 0 1 7 R U (54) ШПИНДЕЛЬНЫЙ УЗЕЛ ПОВЫШЕННОЙ ТОЧНОСТИ УГЛОВОГО ...

Method and Device for Determining an Axle Geometry of a Vehicle

A method for determining characteristics of an axle geometry of a vehicle including the following: steering a wheel mounted on an axle of the vehicle to various steering positions having different steering angles; determining the spatial position of the wheel at the different steering positions; determining the particular axis of rotation of the wheel in the different steering positions from the results of the determination of the spatial position; modeling a parametric model of the steering axis; adapting the parametric model of the steering axis to the axes of rotation of the wheel determined from the measurement of the spatial position; and determining characteristics of the axle geometry from the adapted parametric model of the steering axis. 110-. (canceled)11. A method for determining characteristics of an axle geometry of a vehicle , the method comprising:steering a wheel mounted on an axle of the vehicle to various steering positions having different steering angles;determining a spatial position of the wheel in the different steering positions;determining an axis of rotation of the wheel in the particular steering position from the results of the determination of the spatial position;modeling a parametric model of the steering axis;determining the axis of rotation of the wheel from the parametric model of the steering axis for the different steering positions;adapting the parametric model of the steering axis to the axes of rotation determined from the measurement of the spatial position of the wheel in the different steering positions; anddetermining characteristics of the axle geometry from the adapted parametric model of the steering axis.12. The method of claim 11 , wherein the characteristics determined from the adapted parametric model of the steering axis include at least one of the spread angle and a caster angle.13. The method of claim 11 , further comprising:determining a particular center of rotation of the wheel in the different steering ...

Magnetormeter Calibration for Navigation Assistance

Visual codes are scanned to assist navigation. The visual code may be a Quick Response (QR) code that contains information useful to calibrating a variety of navigation-based sensors such as gyroscopes, e-compasses, and barometric pressure sensors. Embodiments describe methods for magnetometer calibration and computing sensor orientation relative to users' local frame of reference. The embodiments use an initial yaw estimate, accelerometer, and gyroscope measurements along with other readily available information (the earth's magnetic field intensity, inclination angle, and declination angle). 1. A system , comprising:an imaging device;a magnetometer sensor; anda processor coupled to the imaging device and the magnetometer sensor, wherein the processor causes the imaging device to scan a visual code and, based on scanning the visual code, the processor obtains a first value indicative of height of the visual code from the visual code and obtains a magnetometer measurements from the magnetometer sensor and blends accelerometer, gyro measurements and estimates instantaneous yaw;wherein, after scanning the visual code, the processor uses the first value indicative of height of the visual code and the magnetometer measurements to determine a height of the system.2. The system of wherein the first value indicative of height of the visual code indicates a floor of a building.3. The system of wherein the first value indicative of height of the visual code indicates an altitude.4. The system of wherein the visual code includes a Quick Response (QR) code.5. A method claim 1 , comprising:initiating scanning of a visual code;obtaining a first value indicative of height of the visual code from the visual code;obtaining a magnetometer measurements will be taken over time;blending accelerometer and gyro measurements; andestimating instantaneous yaw.6. The method of wherein initiating scanning of the visual code comprises acquiring a digital image of the visual code.7. A system ...

MEASUREMENT METHOD FOR A SURFACE-MEASURING MEASURING MACHINE

Measurement method where a code projection which is dependent on a three-dimensional position of a code carrier relative to a sensor arrangement is generated on a sensor arrangement, and at least part of the code projection is captured. An angular position of the code carrier with reference to the defined axis of rotation is ascertained and a current measurement position of the measurement component relative to a base is determined, wherein, a position value for at least one further degree of freedom of the code carrier relative to the sensor arrangement is ascertained on the basis of the code projection and is taken into account to determine the current measurement position, and a relative position of the connecting element with respect to the holder and/or the deformation thereof is determined from the position value in the form of a change in shape or size. 115-. (canceled)16. A measurement method for a surface-measuring measuring machine , comprising:a base;a measurement component for producing and maintaining a contact-making or contactless measurement connection to a surface to be measured, wherein the measurement component is connected to the base by at least one connection element;at least one rotary encoder, which detects the rotation of the at least one connection element with respect to a receptacle and in each case has a code carrier and a sensor arrangement, wherein code carrier and sensor arrangement are rotatable with respect to one another about a defined axis of rotation as a first degree of freedom,and the method comprising:generating a code projection on the sensor arrangement, said code projection being dependent on the three-dimensional position of the code carrier relative to the sensor arrangement, and detecting at least part of the code projection;determining a rotational position relative to the defined axis of rotation of the code carrier on the basis of the code projection;determining the current measurement position of the measurement ...

Process and Device for Measuring the Rotation Angle of Two Objects Rotating in Relation to Each Other

The disclosure relates to a process for measuring the rotation angle of two objects rotating in relation to each other, with a transmitter assigned to one of the objects, and with an element which influences the direction of polarization, where the transmitter and the element rotate relative to each other, and where the luminous intensity passing through, or reflected by, the element is measured by a receiver and then evaluated as a signal dependent on the rotation angle, and where the receiver groups of receiver elements sensitive to polarization, and where the polarization planes of the receiver elements in each group are rotated in relation to each other, and where the reception signals of at least two of the receiver elements are evaluated independent of each other in a monitoring mode. The disclosure also relates to an apparatus for implementing the process. 111122011303030404041424344414141414141414142424242424242424343434343434343444444444444444441444144414243444141414141414141424242424242424243434343434343434444444444444444abcdefghabcdefghabcdefghabcdefghahahabcdefghabcdefghabcdefghabcdefgh. Process for measuring the angle of rotation of two objects ( , ) rotating in relation to each other , with a transmitter () which is assigned to one of the objects () , and with an element () which influences the direction of polarization , where the transmitter and the element () which influences the direction of polarization rotate relative to each other as a function of the rotation angle , and where the luminous intensity passing through , or reflected by , the element () influencing the direction of polarization and measured by a receiver () is evaluated as a signal dependent on the rotation angle , and where the receiver () has at least two groups ( , , , ) , each with at least two receiver elements ( , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , ) , such that each receiver element (-) is designed as a detector that is sensitive to polarization , ...

VIEWPOINT LOCATION COMPUTATION DEVICE

A viewpoint location computation device that computes a viewpoint location of a driver includes: a first estimated viewpoint location computation unit that computes a first estimated viewpoint location based on the angle of the right side-view minor and a driver's seating center plane of the vehicle; a second estimated viewpoint computation unit that computes a second estimated viewpoint location based on the angle of the left side-view minor and the driver's seating center plane of the vehicle; an identical condition determination unit that determines whether the estimated viewpoint locations are identical; and a viewpoint location computation unit that computes the estimated viewpoint location as the viewpoint location of the driver when it is determined that the estimated viewpoint locations are identical, wherein the viewpoint location computation unit computes the viewpoint location based on the estimated viewpoint locations when it is determined that the respective estimated viewpoint locations are not identical. 1. A viewpoint location computation device that computes a viewpoint location of a driver of a vehicle , comprising:first estimated viewpoint location computation means for computing a first estimated viewpoint location of the driver based on an angle of a first vehicle-mounted mirror provided in the vehicle and a seating center location of the driver's seat of the vehicle;second estimated viewpoint location computation means for computing a second estimated viewpoint location of the driver based on an angle of a second vehicle-mounted minor provided in the vehicle and the seating center location of the driver's seat of the vehicle;third estimated viewpoint location computation means for computing a third estimated viewpoint location of the driver based on an angle of a third vehicle-mounted minor provided in the vehicle and the seating center location of the driver's seat of the vehicle,identical condition determination means for determining whether ...

ENCODER, DRIVING DEVICE, AND ROBOT APPARATUS

An encoder includes: a first scale which has a first index portion; a second scale which has a second index portion; a first detection unit which outputs a first signal based on the first index portion, regarding first relative rotation between a fixing member and a first rotating member; a second detection unit which outputs a second signal based on the second index portion, regarding second relative rotation between the fixing member and a second rotating member; and a signal-processing unit which calculates information regarding the first relative rotation on the basis of the first signal and which calculates information regarding the second relative rotation on the basis of the second signal. 1. An encoder comprising:a first scale which is provided in a fixing member or a first rotating member and which has a first index portion;a second scale which is provided in the fixing member or a second rotating member and which has a second index portion, the second rotating member being mechanically connected to the first rotating member;a first detection unit which outputs a first signal based on the first index portion, regarding first relative rotation between the fixing member and the first rotating member;a second detection unit which outputs a second signal based on the second index portion, regarding second relative rotation between the fixing member and the second rotating member; anda signal-processing unit which calculates information regarding the first relative rotation on the basis of the first signal and which calculates information regarding the second relative rotation on the basis of the second signal.2. The encoder according to claim 1 ,wherein the signal-processing unit includes a common unit which is used in common for a process regarding the first signal and a process regarding the second signal.3. The encoder according to claim 1 ,wherein the first scale is provided in the first rotating member,the second scale is provided in the second rotating ...

ANGLE DETECTOR

An angle detector detects an operation angle of an electric actuator having an electric motor. The electric motor generates rotation force when being energized. The angle detector includes a controller. The controller calculates an average current flowing through the electric motor during operation of the electric actuator. The controller calculates the operation angle of the electric actuator from a predetermined formula by using the average current. 1. An angle detector for detecting an operation angle of an electric actuator having an electric motor , the electric motor configured to generate rotation force when being energized , the angle detector comprising:a controller configured to calculate a first average current flowing through the electric motor during operation of the electric actuator, whereinthe controller calculates the operation angle of the electric actuator from a predetermined formula by using the average current.2. The angle detector according to claim 1 , wherein {'br': None, 'i': a', 'Ia', 'Ia, 'θ={(−Is)/(1−Is)}·θ'}, 'the formula is given byθa represents the operation angle,θ represents a rotation range of the electric actuator determined by a mechanical rotational limitation,Ia represents the first average current,{'b': '1', 'Ia represents a second average current flowing through the electric motor during a total energization time when the electric actuator operates from one end of the rotation range to the other end of the rotation range, and'}Is represents a rotor-locked current flowing though the electric motor when the electric actuator cannot mechanically operate.3. The angle detector according to claim 1 , further comprising:a mechanical stopper attached to the electric actuator to provide the mechanical rotational limitation of the electric actuator.4. The angle detector according to claim 3 , whereinthe electric actuator includes a gear reducer for decelerating an output of the electric motor,the gear reducer includes a final gear for ...

ROAD SURFACE INSPECTION DEVICE AND RECORDING MEDIUM

The road surface inspection process includes acquiring, calculating, and determining. The acquiring includes acquiring a deterioration candidate position at which a deterioration candidate of a road surface is detected by a process of detecting an abnormality on the road surface of a road. The calculating includes calculating a frequency at which an acceleration outside an allowable range is measured at the deterioration candidate position by referring to an acceleration at a measurement position corresponding to the deterioration candidate position among the accelerations stored in a driving data storage. The determining includes determining, when the calculated frequency is equal to or greater than a predetermined threshold value, that the deterioration candidate position at which the frequency is calculated is a position at which the road surface is deteriorated. 1. A computer-readable recording medium having stored therein a program that causes a computer to execute a road surface inspection process comprising:acquiring a deterioration candidate position at which a deterioration candidate of a road surface is detected by a process of detecting an abnormality on the road surface of a road;calculating a frequency at which an acceleration outside an allowable range is measured at the deterioration candidate position by referring to an acceleration at a measurement position corresponding to the deterioration candidate position among the accelerations stored in a driving data storage in which an acceleration measured in a direction parallel to the road surface on which a vehicle drives by an acceleration sensor mounted on the vehicle and a measurement position at which the acceleration is measured are stored in correlation; anddetermining, when the calculated frequency is equal to or greater than a predetermined threshold value, that the deterioration candidate position at which the frequency is calculated is a position at which the road surface is deteriorated.2. ...

SYSTEM AND METHOD FOR NORTH FINDING

A payload including a gimbal assembly and gyro assembly that includes a gyro assembly control associated with the gyro assembly and operable to trigger the gyro assembly to obtain deviation measurements and process the measurements in a first dynamic range for stabilizing the payload utilizing the gimbal assembly. The gyro assembly control is operable to trigger the gyro assembly to obtain instantaneous measurements and process the measurements in a second dynamic range having different sensitivity than the first dynamic range, for finding deviation of the payload from the magnetic north of the earth. 113-. (canceled)14. A payload including a gimbal assembly and associated gyro assembly , comprisinga gyro assembly control associated with said gyro assembly and operable to trigger the gyro assembly to obtain deviation measurements in the azimuth plane and elevation plane and process the measurements in a first dynamic range corresponding to a first rotation rate range, for stabilizing the payload utilizing said gimbal assembly;the gyro assembly control being operable to trigger the gyro assembly to obtain instantaneous measurements and process the measurements in a second dynamic range corresponding to a second rotation rate range having different sensitivity than said first dynamic range, for finding deviation of the payload from the north of the earth.15. The payload according to claim 14 , wherein said gyro assembly includes an azimuth rate gyro and an elevation rate gyro disposed perpendicularly thereto;said gyro assembly control being operable to drive said elevation rate gyro to rotate about azimuth axis for obtaining and recording instantaneous measurements during at least 360° rotation; said gyro assembly control being further operable to derive a wander angle representative of said deviation from the north based on said recorded measurements.16. The payload according to claim 15 , wherein said gyro assembly control module is configured to calculate a sine ...

ROTATION ANGLE DETECTING DEVICE

A rotation angle detecting device includes a resolver that outputs three-phase signals based on a rotation angle of a rotary shaft, and an R/D converter that acquires the three-phase output signals via signal lines corresponding to the respective phases. The R/D converter determines the rotation angle of the rotary shaft on the basis of the three-phase output signals. The R/D converter includes switching elements that change the potential of the first-phase signal line and the potential of the second-phase signal line, respectively. 1. A rotation angle detecting device including a resolver that outputs signals of multiple phases based on a rotation angle of a rotary shaft , and a resolver/digital converter that acquires the signals of the multiple phases via signal lines corresponding to the respective phases and that determines the rotation angle of the rotary shaft on the basis of the signals of the multiple phases , whereinthe resolver/digital converter includes potential changing means for changing a potential of at least one of the signal lines.2. The rotation angle detecting device according to claim 1 , further comprisingabnormality detecting means for detecting a short circuit in the signal lines corresponding to the respective phases on the basis of a variation in the signal of each phase other than any one specified phase, which is input to the resolver/digital converter when the potential changing means changes the potential of the signal line corresponding to the one specified phase among the signal lines corresponding to the respective phases.3. The rotation angle detecting device according to claim 2 , wherein the abnormality detecting means executes a short circuit detecting process of detecting a short circuit in the signal lines corresponding to the respective phases at predetermined intervals claim 2 , and only when the short circuit detecting process is executed claim 2 , the potential changing means changes the potential of the signal line.4. The ...

GRADIENT MEASURING APPARATUS AND SYSTEM

A gradient measuring apparatus includes a gimbal assembly operably supported in a vehicle for viewing by an operator to see gradient indications. The gimbal assembly includes a support housing (such as outer orb with transparent portion) and a multi-axis gravity-biased-to-center inner orb weighted to return to gravitational center. The outer orb includes ring gradient indicators, and the inner orb includes a center indicator. By this arrangement, the center indicator accurately reflects on the gradient indicators a grade at which a surface is being cut in an excavating process when viewed in combination with the gradient indicators due to multi-axis gravitation movement of the inner orb. 1. A gradient measuring apparatus comprising:a gimbal assembly operably supported in a visible position in a vehicle, the gimbal assembly including a support housing and a multi-axis gravity-biased-to-center inner orb, one of the support housing and the inner orb including gradient indicators, and the other of the support housing and the inner orb including a center indicator, with both the center and gradient indicators being simultaneously visible, wherein the center indicator accurately reflects on the gradient indicators a grade at which a surface is being cut in an excavating process when viewed in combination with the gradient indicators due to multi-axis gravitation movement of the inner orb.2. The gradient measuring apparatus defined in claim 1 , including a base unit adapted to be coupled to a surface within a vehicle and that operably supports the gimbal assembly.3. The gradient measuring apparatus defined in claim 2 , wherein the support housing includes an outer orb claim 2 , as least part of which is transparent.4. The gradient measuring apparatus defined in claim 3 , including a liquid that suspends the inner orb in the outer orb.5. The gradient measuring apparatus defined in claim 4 , including a weight inside the inner orb that causes multi-axis gravity-biased-to- ...

Determining and Correcting Error of Positional Vector-Valued Sensors Using a Fixed Angle Calibration Process

Systems and methods described herein relate to the correction of positional vector-valued sensors using a variety of calibration processes including fixed-angle calibration, known-angle calibration, ortho-calibration and 3-axis gimbal calibration further including various weighting schemes to provide fine-tuned functions or interpolated data which may be used for real-time sensor correction calculation or to populate a look-up table of corrected values. 1. A sensor calibration system comprising:a vector-value sensor; [ 'recording, in a computer memory, a prime sensed vector;', 'in response to placing said vector-value sensor in a prime orientation, 'recording, in said computer memory, a first sensed vector;', 'in response to rotating said vector-value sensor a first known angle away from said prime orientation, 'recording, in said computer memory, a second sensed vector;', 'in response to rotating said vector-value sensor a second known angle away from said prime orientation, 'recording, in said computer memory, through “n” sensed vector(s);', 'in response to rotating said vector-value sensor through “n” known angles away from said prime orientation, calculating a first calculated vector by rotating the prime sensed vector by said first known angle away from said prime orientation;', 'calculating a second calculated vector by rotating the prime sensed vector by said second known angle away from said prime orientation;', 'calculating through “n” calculated vector(s) by rotating the prime sensed vector by each of said “n” known angle(s) away from said prime orientation;, 'calculating a set of calculated vectors by, {'sub': 'i', 'claim-text': said first sensed vector from said first calculated vector;', 'said second sensed vector from said second calculated vector;', 'each of said “n” sensed vectors from each of said “n” calculated vector(s); and, 'calculating a set of first, second, through “n” vector corrections (cv) by subtracting, 'calculating said final correction ...

ORIENTATION DEVICE INCLUDING MEANS FOR DETECTING THAT THE DEVICE IS LYING FLAT ON A SUPPORT

The invention relates to an orientation device comprising: a true north finder including a rate-gyroscope-type member, as well as sensors that can be used to measure the inclination of the device in relation to the horizontal, and associated calculation means for determining the orientation of the true north used on information provided by the rate gyroscope-type member and the sensors. According to the invention, the device also includes three feet that are used to support the device when it is placed on a support, at least one of said feet including a built-in sensor that changes state when the device is resting on a support by means of the feet, and means for automatically triggering the determination of the orientation of the north when the device is sufficiently horizontal and when the sensor indicates that it is placed on a support. 1. An orientation device comprising a true-north finder including a member of rate gyro type and sensors for measuring the inclination of this device with respect to the horizontal , and associated calculation means for determining the orientation of true north on the basis of information issued by the rate-gyro-type member and the sensors , comprising three legs intended to support it when placed on a support , and at least one of these legs incorporates a sensor that changes state when the device is resting on a support via its legs , and means for automatically triggering a determination of the orientation of north when the device is sufficiently horizontal and the sensor is indicating that it is resting on a support.2. The device as claimed in claim 1 , further comprising three other legs designed so that it can be rested upside down on a support claim 1 , and in which at least one of the three other legs comprises a sensor that changes state when the device is resting upside down on a support via these three other legs claim 1 , as well as means for automatically triggering a determination of the orientation of true north when ...

ANGLE-BASED ITEM DETERMINATION METHODS AND SYSTEMS

Angle-based item determination methods and systems are provided. First, the orientation of an electronic device is detected via at least one sensor. An included angle between a specific axis of the electronic device and a specific direction is obtained. Then, one of a plurality of items is determined according to the included angle. 1. An angle-based item determination method for use in an electronic device , comprising:detecting the orientation of the electronic device via at least one sensor;obtaining a first included angle between a specific axis of the electronic device and a specific direction at a first time point;obtaining a second included angle between the specific axis of the electronic device and the specific direction at a second time point;calculating an angle difference according to the first included angle and the second included angle; anddetermining one of a plurality of items according to the angle difference.2. The method of claim 1 , further comprising receiving an instruction claim 1 , and in response to the instruction claim 1 , the first included angle between the specific axis of the electronic device and the specific direction at the first time point is recorded.3. The method of claim 2 , further comprising:determining whether the orientation of the electronic device matches with or substantially matches with a specific orientation, or whether a movement of the electronic device matches with or substantially matches with a specific movement; andgenerating the instruction when the orientation of the electronic device matches with or substantially matches with the specific orientation, or when the movement of the electronic device matches with or substantially matches with the specific movement.4. The method of claim 1 , wherein the specific direction comprises a direction of gravity claim 1 , or a geographical direction.5. The method of claim 1 , further comprising displaying the determined item in a user interface via a display unit.6. The ...

COMPAS AND CLINOMETER APPARATUS HAVING THE COMPAS

A compass includes a case, a first support shaft, a second support shaft, and a needle. The case includes an upper plate, a lower plate, and a side wall that connects edge portions of the upper plate and the lower plate. The first support shaft is coupled to the lower plate and protrudes toward the upper plate, and the second support shaft is coupled to the upper plate and protrudes toward the lower plate. The needle includes a support unit, a first indicator unit, and a second indicator unit. The support unit is disposed between the first support shaft and the second support shaft, and includes a first support groove that is formed close to the first support shaft and a second support groove that is formed close to the second support shaft. The first indicator unit is coupled to one side of the support unit, and the second indicator unit is coupled to the support unit to face the first indicator unit with the support unit therebetween. 1. A compass comprising:a case that comprises an upper plate, a lower plate that faces the upper plate, and a side wall that connects edge portions of the upper plate and the lower plate;a first support shaft that is coupled to the lower plate and protrudes toward the upper plate;a second support shaft that is coupled to the upper plate and protrudes toward the lower plate; anda needle comprising a support unit that is disposed between the first support shaft and the second support shaft and comprises a first support groove that is formed close to the first support shaft and a second support groove that is formed close to the second support shaft, a first indicator unit that is coupled to one side of the support unit, and a second indicator unit that is coupled to the support unit to face the first indicator unit with the support unit therebetween.2. The compass of claim 1 , wherein an end portion of the first support shaft is received in the first support groove claim 1 , andan end portion of the second support shaft is received in ...

Magnetic field compensation system and method thereof

A compass system configured to compensate for electromagnetic interference in a vehicle is provided that includes an electronic device that is sensitive to electromagnetic interference (EMI), wherein the electronic device is positioned in a vehicle such that the electronic device receives EMI from another accessory in the vehicle, and wherein the electronic device is configured to compensate for the EMI, such that the EMI field caused by the accessory can be detected and added to existing calibration point while the accessory is powered on.

HEADING CALIBRATION METHOD AND COMPASS SENSOR USING THE SAME

A heading calibration method, adapted for a compass sensor is provided. The heading calibration method includes the following steps. R data segments are sequentially generated by rotating the compass sensor by a predetermined angle, wherein the data segments includes a plurality of magnetic data respectively. A partial calibration process is executed to calibrate a reference point coordinate according to the magnetic data in rdata segment and a initial value of the reference point coordinate, wherein r is between 1 and the R. Parts of the magnetic data in the rdata segment is extracted as whole data, and a whole calibration process is executed according to the whole data to update an initial value of the reference point coordinate. The partial calibration process is executed according to the updated initial value of the reference point coordinate and the magnetic data in a (r+1)data segment. 1. A heading calibration method , adapted to a compass sensor , the heading calibration method comprising:sequentially generating R data segments by rotating the compass sensor by a predetermined angle, wherein the R data segments respectively comprise a plurality of magnetic data;{'sup': 'th', 'executing a partial calibration process to calibrate a reference point coordinate of the compass sensor according to the magnetic data in a rdata segment of the R data segments and an initial value of the reference point coordinate, wherein r is between 1 and R−1;'}{'sup': 'th', 'taking a sampling interval as a unit to extract parts of the magnetic data in the rdata segment as whole data, and executing a whole calibration process according to the whole data to update the initial value of the reference point coordinate; and'}{'sup': 'th', 'executing the partial calibration process according to the updated initial value of the reference point coordinate and the magnetic data in a (r+1)data segment of the R data segments.'}2. The heading calibration method as claimed in claim 1 , wherein ...

Envelope Calculation By Means of Phase Rotation

According to an embodiment of the invention, the received signal of a level sensor is sampled at discrete times, and the sampled values are digitised. New values are obtained from the digitised sample values by rotating the phase through a predetermined angle, which new values are then used together with the digital sample values to calculate the envelope curve. 114-. (canceled)15. A method for calculating an envelope-curve value in a level measurement by a level sensor , comprising steps of:sampling a received signal of the level sensor at discrete times, resulting in sample values;converting the sample values of the sampled received signal into digital sample values;calculating a new value for a first digital sample value of the digital sample values by rotating the phase of the sample value through a predetermined angle, for example using a digital filter in the time domain or in the frequency domain; andcalculating an envelope-curve value from the first digital sample value and from the new value calculated by the phase rotation.16. The method according to claim 15 , wherein the received signal is converted into a time-expanded intermediate frequency signal before sampling.18. The method according to claim 15 , wherein the conversion of the sample values into digital sample values is performed by subsampling.19. The method according to claim 15 , wherein the predetermined angle has a value not equal to 90°.20. The method according to claim 15 , wherein the digital filter in the time domain has an FIR filter structure or an IIR filter structure.21. The method according to claim 15 , wherein the digital filter in the frequency domain performs a Fourier transform.22. The method according to claim 15 , wherein the phase rotation is performed by a Hilbert filter and hence the predetermined angle has a value equal to 90°.23. The method according to claim 15 , wherein coherent ensemble averaging is performed before calculating the envelope curve.24. The method ...

QUICK MULTIFUNCTIONAL SMART WATCH FOR WORSHIP TIMING AND ORIENTATION AND CONTROL METHOD

Disclosed is a quick multifunctional smart watch for worship timing and orientation and a control method, relating to the technical field of smart watches, for solving the problem that no portable wearable products for orientated and timed reminding meet requirements of Moslems for worships in the prior art. The watch comprises a controller, a positioning module, a geomagnetic sensor and pointer devices; the positioning module is used for acquiring position information of current position and sending to the controller; the geomagnetic sensor is used for acquiring direction information of current position and sending to the controller; the controller is used for controlling pointer devices to point to the direction of Mecca according to pre-stored position information of Mecca, position information and direction information of current position and GIS geographic information pre-stored in the controller; and the controller is also used for reminding worships according to pre-stored preset worship time. 1101102103. A quick multifunctional smart watch for worship timing and orientation , comprising a controller () , a positioning module () , a geomagnetic sensor () and pointer devices;{'b': 102', '101, 'the positioning module () is used for acquiring position information of a current position and sending the position information of the current position to the controller ();'}{'b': 103', '101, 'the geomagnetic sensor () is used for acquiring direction information of the current position and sending the direction information of the current position to the controller ();'}{'b': 101', '101', '101', '101', '101, 'the controller () is used for controlling the pointer devices to point to the direction of Mecca according to the position information of Mecca pre-stored in a memory of the controller (), the position information of the current position, the direction information of the current position and the GIS (Geographic Information System) geographic information pre-stored ...

Compass device

A compass device includes a base seat, a vial unit received in an accommodation hole of the base seat, an azimuth unit rotatably sleeved around the vial unit, a first spring wire disposed to resiliently retain the vial unit to the azimuth unit for magnetic declination adjustment, and a second spring wire disposed to resiliently retain the azimuth unit to the base seat for bearing angle measurement.

METHOD AND APPARATUS OF CORRECTING OUTPUT VALUE OF GEOMAGNETIC SENSOR

A method of correcting an output value of a geomagnetic sensor that recursively calculates a state estimate, an estimate gain vector, and an estimate error co-variance based on the output value of the geomagnetic sensor that is acquired sequentially and corrects the output value of the geomagnetic sensor based on the value includes acquiring a koutput value of the geomagnetic sensor, calculating a kestimate gain vector based on a k−1estimate error co-variance and the koutput value, calculating a kstate estimate based on the calculated kestimate gain vector and the koutput value and a k−1state estimate, calculating the kestimate error co-variance using the kestimate gain vector and a k−1estimate error co-variance, and correcting the output value of the geomagnetic sensor based on the kstate estimate, wherein k is a natural number larger than 1. 1. A method of correcting an output value of a geomagnetic sensor that recursively calculates a state estimate , an estimate gain vector , and an estimate error co-variance based on the output value of the geomagnetic sensor that is acquired sequentially and corrects the output value of the geomagnetic sensor based on the value , the method comprising:{'sub': 'th', 'acquiring a koutput value of the geomagnetic sensor;'}{'sub': th', 'th', 'th, 'calculating a kestimate gain vector based on a k−1estimate error co-variance and the koutput value;'}{'sub': th', 'th', 'th', 'th, 'calculating a kstate estimate based on the calculated kestimate gain vector and the koutput value and a k−1state estimate;'}{'sub': th', 'th', 'th, 'calculating the kestimate error co-variance using a kestimate gain vector and the k−1estimate error co-variance; and'}{'sub': 'th', 'correcting the output value of the geomagnetic sensor based on the kstate estimate, wherein'}k is a natural number larger than 1.2. The method of correcting the output value of the geomagnetic sensor of claim 1 , wherein the output value of the geomagnetic sensor is an output value ...

AUTOMATIC COMPASS CALIBRATION SYSTEMS AND METHODS

Techniques are disclosed for systems and methods to provide automatic and substantially continuous calibration for compasses mounted to moving structures. A compass calibration system may include a logic device configured to receive one or more sensor signals and determine a corrected magnetic field based, at least in part, on a measured local magnetic field. The logic device may be adapted to receive an angular velocity, an acceleration, the measured local magnetic field, and/or a speed of a mobile structure; generate stabilized roll and pitch components of an orientation of the mobile structure based, at least in part, on the acceleration and angular velocity; and determine the corrected magnetic field based, at least in part, on the speed, the local magnetic field, the stabilized roll and pitch components, and/or the angular velocity. 1. A system comprising: receive an angular velocity, an acceleration, the measured local magnetic field, and/or a speed of a mobile structure;', 'generate stabilized roll and pitch components of an orientation of the mobile structure based, at least in part, on the acceleration and angular velocity; and', 'determine the corrected magnetic field based, at least in part, on the speed, the local magnetic field, the stabilized roll and pitch components, and/or the angular velocity., 'a logic device configured to receive one or more sensor signals and determine a corrected magnetic field based, at least in part, on a measured local magnetic field, wherein the logic device is adapted to2. The system of claim 1 , wherein:the stabilized roll and pitch components define a stabilized horizontal plane;the logic device is adapted to determine a heading of the mobile device based, at least in part, on a projection of the corrected magnetic field onto the stabilized horizontal plane; andthe determined heading is relatively insensitive to signal artifacts in yaw-rate components of the received angular velocity.3. The system of claim 1 , wherein ...

SYSTEMS AND METHODS FOR IMPLEMENT POSITION MEASUREMENT

A method for retrofitting a plurality of position sensors on a machine includes installing the plurality of position sensors on the machine, wherein the position sensors include at least two inertial measurement units (IMUs). The method further includes calibrating orientation of the IMUs, obtaining measurements from the IMUs, determining relative differences between the measurements obtained from the IMUs, and processing the relative differences using a Kalman filter procedure to determine positional data of the machine. 1. A method for retrofitting a plurality of position sensors on a machine , the method comprising:a. installing the plurality of position sensors on the machine, wherein the position sensors include at least two inertial measurement units (IMUs);b. calibrating orientation of the IMUs;c. obtaining measurements from the IMUs;d. determining relative differences between the measurements obtained from the IMUs; ande. processing the relative differences using a Kalman filter procedure to determine positional data of the machine.2. The method of claim 1 , wherein the machine is a mobile machine including one or more linkages coupled to an implement system claim 1 , and at least one of the IMUs are located on the one or more linkages.3. The method of claim 2 , wherein at least one IMU is not aligned with a linkage motion of the implement system of the machine.4. The method of claim 1 , wherein a first IMU is located on a lift arm of the machine claim 1 , and a second IMU is located on a tilt lever or a chassis of the machine.5. The method of claim 1 , wherein the plurality of position sensors includes three IMUs.6. The method of claim 1 , wherein the positional data includes accelerations claim 1 , angular velocities claim 1 , gravity-based pitch or roll angles claim 1 , or a combination thereof.7. The method of claim 1 , wherein the positional data is obtained during movement of the machine.8. The method of claim 1 , wherein calibrating the orientation of ...

METHOD AND APPARATUS FOR TESTING ROLL TOGETHER

A method and apparatus for testing roll together of a mattress using two weights, preferably weighted cylinders, and moving one of the weights towards the other while measuring change in distance between the weights and changes in angle of the stationary weight. 1. A method of testing roll together of a mattress , the method comprising the steps of:positioning a first weight and a second weight on the mattress a measured distance apart from each other;moving the second weight relative to the first weight so that it is a different measured distance apart from the first weight; anddetermining any change in angle of the first weight in response to the second weight being moved.2. The method of claim 1 , wherein the mass of at least one of the weights is variable and the method comprises the step of varying the mass of the one or more variable weight weights until each weight has a predetermined mass.3. The method of claim 1 , wherein the first weight and the second weight are weighted cylinders.4. The method of claim 3 , wherein the first weight is a first weighted cylinder and the second weight is a second weighted cylinder and preferably the weighted cylinders are interchangeable.5. The method of claim 1 , wherein the step of moving the second weight relative to the first weight so that it is a different measured distance apart from the first weight comprises measuring displacement of the second weight as it is moved.6. The method of claim 5 , wherein the displacement of the second weight is measured by measuring revolutions claim 5 , including any partial revolution claim 5 , of the second weight as it is rolled across the mattress.7. The method of claim 1 , wherein the step of determining any change in angle of the first weight in response to the second weight being moved comprises taking a measurement using an inclinometer.8. The method of claim 7 , wherein the step of determining any change in angle of the first weight in response to the second weight being moved ...

COMPASS-SENSOR EMBEDDED FOOTWEAR SYSTEM AND OPERATION METHOD THEREOF

A compass-sensor embedded footwear system and an operation method thereof are provided. The compass-sensor embedded footwear system includes: a footwear including: a footwear sole; two pressure sensors embedded in the footwear sole; a compass sensor configured in a fixed orientation with respect to the footwear sole; and a control-communication unit connecting to each of the two pressure sensors and compass sensor. 1. A compass-sensor embedded footwear system comprising:a footwear, including:a footwear sole;two pressure sensors embedded in the footwear sole;a compass sensor configured in a fixed orientation with respect to the footwear sole; anda control-communication unit connecting to each of the two pressure sensors and compass sensor.2. The system according to claim 1 , wherein:the footwear further includes a battery module connected to the control-communication unit, andthe battery module is embedded in the footwear sole or attached to an outer surface of the footwear including the footwear sole.3. The system according to claim 1 , wherein:the footwear, including a footwear sole, is in a form of a shoe or a shoe insole.4. The system according to claim 1 , wherein:the two pressure sensors are positioned on two areas of the footwear sole, such that: when a human foot is wearing the footwear, the two areas correspond to a fore part and a heel part of the human foot.5. The system according to claim 1 , wherein:the compass sensor is placed, such that when the footwear sole is substantially leveled in a horizontal position, the compass sensor is in normal operation.6. The system according to claim 1 , wherein:each of the compass sensor and the control-communication unit is embedded in the footwear sole or attached to an outer surface of the footwear including the footwear sole.7. The system according to claim 1 , wherein:the pressure sensors, the compass sensor, the control-communication unit, and a battery module are together embedded in the footwear sole.8. The ...

ELECTRONIC APPARATUS

An electronic apparatus includes a detecting unit that detects a magnetic field and outputs a detection value corresponding to the detected magnetic field, a correcting unit that corrects the detection value according to a type of a power source connected to the electronic apparatus, and a determining unit that determines, using the corrected detection value, an azimuth in which a predetermined surface of the electronic apparatus is directed. 1. An electronic apparatus comprising:a detecting unit that detects a magnetic field and outputs a detection value corresponding to the detected magnetic field;a correcting unit that corrects the detection value according to a type of a power source connected to the electronic apparatus; anda determining unit that determines, using the corrected detection value, an azimuth in which a predetermined surface of the electronic apparatus is directed.2. The electronic apparatus according to claim 1 , wherein the power source connected to the electronic apparatus includes one or more batteries.3. The electronic apparatus according to claim 1 , wherein the correcting unit corrects the detection value according to the type of the power source connected to the electronic apparatus so as to correct distortion of a magnetic field that occurs by the power source connected to the electronic apparatus.4. The electronic apparatus according to claim 1 , further comprising a notification unit that notifies a user of information concerning that an azimuth in which the predetermined surface of the electronic apparatus is directed cannot be detected claim 1 , in a case where the type of the power source connected to the electronic apparatus is not determined.5. The electronic apparatus according to claim 1 , further comprising a notification unit that notifies a user of information concerning that accuracy of a process for detecting an azimuth in which the predetermined surface of the electronic apparatus is directed is decreased claim 1 , in a ...

DETERMINING TILT ANGLE AND TILT DIRECTION USING IMAGE PROCESSING

A method of determining a tilt angle and a tilt direction of a survey instrument includes capturing first images at a first location that include features from an environment around the survey instrument and capturing second images at a second location that include a portion of the features. A pose of the imaging device is determined at the second location using observed changes in location of a common portion of the features between the first images and the second images. The tilt angle and the tilt direction of the survey instrument at the second location are determined using the pose of the imaging device. 1. A method of determining a tilt angle and a tilt direction of a survey instrument that includes an imaging device , the method comprising:at a first location, obtaining reference information using the imaging device, the imaging device including a plurality of cameras arranged to capture images that include features from an environment around the survey instrument, the reference information including first images that include first features;moving the survey instrument from the first location to a second location;at the second location, obtaining image information using the imaging device, the image information including second images that include a portion of the first features;processing the reference information and the image information to determine a pose of the imaging device at the second location, the pose determined using observed changes in location of the portion of the first features between the first images and the second images, wherein processing the reference information and the image information includes assigning a weighting factor to each of the second images, the weighting factor associated with a relative contribution of each of the second images in determining the pose of the imaging device; anddetermining the tilt angle and the tilt direction of the survey instrument at the second location using the pose of the imaging device.2. The ...

SMART WATCH

A smart watch comprises a case, a display device configured to present a user interface disposed in substantially all of a face of the case, a bezel around the display device configured to be rotated to select a mode of operation of the smart watch, and an analog first watch arm and an analog second watch arm disposed over the display, the second watch arm coaxial with the first watch arm. In a first mode of operation, the user interface presents a watch dial and control the first and second watch arms indicate a time of day first and second watch arms to indicate a time of day. In a second mode of operation, the user interface presents a dial and control the first and second watch arms form a pointer, the pointer configured to indicate a reading on the dial. 1. A smart watch , comprising:a case having a face;a display device disposed in substantially all of the face of the case, the display device configured to present a user interface;a bezel disposed in the face of the case around the display device, the bezel configured to be rotated with respect to the display device to select a mode of operation of the smart watch;an analog first watch arm and an analog second watch arm disposed over the display, the second watch arm coaxial with the first watch arm, cause the user interface to present a watch dial and control the first and second watch arms indicate a time of day first and second watch arms to indicate a time of day in a first mode of operation, and', 'cause the user interface to present a dial and control the first and second watch arms form a pointer, the pointer configured to indicate a reading on the dial in a second mode of operation., 'a processor coupled with the display device, bezel, and the first and second watch arms, the processor configured to2. The smart watch as recited in claim 1 , wherein the second mode of operation is associated with weather and the user interface presents a thermometer dial claim 1 , the thermometer dial including a ...

Electronic Device With Calibrated Compass

An electronic device may have electrical components mounted in alignment with an electronic device housing. A compass in the electronic device housing may potentially be misaligned with respect to the electrical components and the electronic device housing. Reference devices having compasses may be used to gather compass data while one or more electrical components in the reference devices are controlled to generate magnetic fields that are detected by the compasses. An electronic device may be calibrated in a factory or in the field using calibration data produced by comparing compass readings gathered from the compass in the device while controlling electrical components in the device to compass data from the reference devices. Calibration data may be applied to compass readings in real time to correct for misalignment between the compass and the electronic device housing. 1. A method of calibrating a compass in an electronic device that has an electronic device housing , comprising:gathering raw compass readings with the compass; andcalibrating the raw compass readings using calibration data that compensates for misalignment of the compass with respect to the electronic device housing.2. The method defined in wherein calibrating the raw compass readings comprises multiplying the raw compass readings with a calibration rotation matrix.3. The method defined in further comprising:gathering compass data with a compass in a reference device; andcomparing the compass data from the compass in the reference device to compass readings from the compass in the electronic device to produce the calibration data.4. The method defined in wherein the reference device comprises one of a set of reference devices each of which has a compass with a different orientation with respect to an electronic device housing in that reference device and wherein gathering the compass data comprises gathering the compass data from the compasses in the set of reference devices.5. The method ...

Welder's Work Piece Positioning and Leveling Tool

A specially designed welder's work piece positioning and leveling tool that includes a plurality of strategically oriented work piece positioning surfaces provided on the tool body for holding and correctly positioning work pieces to be welded together. The tool also includes a plurality of differently oriented bubble vials that are secured within the tool body in a manner such that, if any one of the bubble vials become broken, or otherwise damaged, it can be easily replaced and the level need not be discarded. 1. A work positioning and leveling tool comprising:(a) a body having a top surface, a bottom surface and first and second end surfaces, at least one of said first and second end surfaces extending at an angle with respect to said top surface, said body having a plurality of vial chambers, each said vial chamber having a threaded opening;(b) a bubble vial disposed within each of said vial chambers of said body;(c) a threaded connector receivable within said threaded opening of each of said vial chambers for movement between first and second positions to secure said bubble vials within said vial chambers;(d) at least one magnet connected to said bottom surface of said body; and(e) at least one magnet connected to said first end surface of said body.2. The work positioning and leveling tool as defined in further including at least one magnet connected to said second end surface of said body.3. The work positioning and leveling tool as defined in further including a bulls-eye level connected to said top surface of said body.4. The work positioning and leveling tool as defined in in which said threaded connector comprises a cap screw.5. The work positioning and leveling tool as defined in in which each of said top claim 1 , bottom and first end surfaces is provided with a longitudinally extending claim 1 , generally V-shaped groove.6. The work positioning and leveling tool as defined in in which each of said top claim 1 , bottom and first end surfaces is provided ...

Method and Apparatus for Establishing a North Reference for Inertial Measurement Units using Scene Correlation

A scene correlation-based target system and related methods are provided. A reference image depicts a remotely-positioned object having identifiable characteristics, wherein a reference directional vector is established relative to the reference image. A target image of a general vicinity of the remotely-positioned object has an unknown directional vector, the target image having at least a portion of the identifiable characteristics. An inertial measuring unit has a scene correlation system, wherein the scene correlation system matches the portion of the identifiable characteristics of the target image with the identifiable characteristics of the reference image, wherein a slew angle between the reference image and the target image is calculated. A target image directional vector is derived from the calculated slew angle and the reference directional vector. 1. A scene correlation-based target system comprising:a reference image depicting a remotely-positioned object having identifiable characteristics, wherein a reference directional vector is established relative to the reference image;a target image of a general vicinity of the remotely-positioned object having an unknown directional vector, the target image having at least a portion of the identifiable characteristics;an inertial measuring unit having a scene correlation system, wherein the scene correlation system matches the portion of the identifiable characteristics of the target image with the identifiable characteristics of the reference image, wherein a slew angle between the reference image and the target image is calculated; anda target image directional vector derived from the calculated slew angle and the reference directional vector.2. The scene correlation-based target system of claim 1 , wherein the reference directional vector is a North vector.3. The scene correlation-based target system of claim 1 , wherein the remotely-positioned object is positioned at least 2 kilometers (km) away from a ...

SHOE MOUNTED GRADIOMETER TOOL AND METHOD OF ADJUSTMENT

There is disclosed a shoe mounted gradiometer tool. The tool includes an enclosed housing having a convex interior base and a transparent top. A ball is disposed within the enclosed housing. The ball is sized and shaped to roll on the convex interior base. There is a mounting piece connected to the enclosed housing for securing the enclosed housing to an exterior surface of a shoe. The position of the shoe mounted gradiometer tool may be adjusted by placing a fastener through a fastener-receiving hole on the mounting piece. The fastener is loosely connected to a shoe. The orientation of the housing is adjusted by pivoting the housing around the fastener-receiving hole so that a marked level position of the tool corresponds to the lowest position of the convex interior base. The mounting piece is then mounted fixedly to the shoe. 1. A shoe mounted gradiometer tool , comprising:an enclosed housing having a convex interior base and a transparent top;a ball disposed within the enclosed housing, the ball sized and shaped to roll on the convex interior base; anda mounting piece connected to the enclosed housing for securing the enclosed housing to an exterior surface of a shoe.2. The shoe mounted gradiometer tool of in which the mounting piece further comprises a fastener-receiving hole.3. The shoe mounted gradiometer tool of in which the convex interior base forms an arcuate surface having a marked level position and a lowest position.4. The shoe mounted gradiometer tool of in which fastener-receiving hole of the mounting piece defines a pivoting axis and in which rotation of the enclosed housing about the pivoting axis changes the lowest position of the arcuate surface.5. The shoe mounted gradiometer tool of in which the pivoting axis and the marked level position of the arcuate surface lie in the same vertical plane when the lowest position corresponds to the marked level position.6. The shoe mounted gradiometer tool of in which the enclosed housing further comprises a ...

MAGNETIC COMPASS

A magnetic compass is provided which features a stationary central pointer which extends outwards to the inside of a rim displaying graduated angular indicia, said rim being integral with a pivoting disc which is magnetically coupled. The central pointer assumes the graphic shape of a craft, such as a ship's hull, the stationary disposition of which offers a more intuitive realisation of the directional heading of a vessel with respect to the cardinal axes of a compass. 1. A magnetic compass assembly which includes north seeking magnets coupled to a freely pivoting disc with a vertical rotational axis wherein an outer rim comprising a shallow cylinder extending downwards from the outer periphery of the disc , said cylinder having graduation markings on the inside surface and a rotationally fixed pointer located radially within the cylinder , said pointer being alignable parallel to a longitudinal axis of a craft in which the compass is to be mounted.2. The magnetic compass as in claim 1 , wherein a base which supports the pointer is transparent thereby enabling viewing from below the plane of the disc.3. The magnetic compass as in claim 1 , wherein the disc is transparent thereby allowing viewing from above the plane of the disc.4. The magnetic compass as in claim 1 , wherein the pointer is an opaque representation of the craft including an extension from the forward end of the representation claim 1 , said extension terminating in close proximity to the graduated rim.5. The magnetic compass as in claim 1 , wherein both the pointer and a pin onto which the disc is pivoted are mounted on a base which is supported on a gimbal arrangement.6. The magnetic compass as in claim 5 , whereby the assembly of components are housed within a transparent spherical chamber which is filled with a transparent oil.7. The magnetic compass as in claim 4 , wherein the craft is a ship or boat and the pointer is an outline of a hull with a bowsprit representing the extension.8. The ...

JELLYFISH-INSPIRED TILT SENSOR AND ARTIFICIAL MESOGLEA

Components of an unmanned undersea vehicle are inspired by jellyfish that uses its flexible body and tilt sensing to achieve efficient swimming and turning. A tilt sensor, based on a statocyst, has a metal ball in a chamber lined with resistors. The tilt is sensed in accordance with which resistors the ball contacts. A composition of polyvinyl alcohol hydrogel with ferritin particles dispersed therein mimics the qualities of a jellyfish's mesoglea. 1. A tilt sensor for sensing a tilt angle , the tilt sensor comprising:a support defining a cavity;a plurality of electrical elements surrounding the cavity; anda conductive object disposed in the cavity so as to move within the cavity in accordance with the tilt angle to change an electrical property of the tilt sensor to allow sensing of the tilt angle.2. The tilt sensor of claim 1 , wherein the conductive object is in electrical contact with at least two of the electrical elements to form an electrical connection between the at least two of the electrical elements claim 1 , and wherein the electrical property comprises the electrical connection.3. The tilt sensor of claim 2 , wherein the electrical elements comprise resistors claim 2 , capacitors or resonators.4. The tilt sensor of claim 3 , wherein the electrical elements further comprise a base plate claim 3 , and wherein the electrical connection is between the base plate and at least one of the electrical elements such as resistors.5. The tilt sensor of claim 3 , wherein the resistors are connected in series claim 3 , and wherein an electrical output of the tilt sensor increases linearly with the tilt angle.6. The tilt sensor of claim 1 , wherein the cavity is circular in two-dimensions or a geometrical chamber such as cube or sphere in three-dimensions.7. A method for sensing a tilt angle claim 1 , the method comprising:(a) providing a tilt sensor comprising a support defining a cavity, a plurality of electrical elements surrounding the cavity, and a conductive ...

Clinocompass for measuring strike and dip on irregular geological outcrop, and method of measuring strike and dip by using the same

Disclosed is a clinocompass for measuring a strike and a dip on an irregular geological outcrop and a method of measuring the strike and the dip by using the same. Since the level meter of the clinometer is supported by providing a support force and a fixing force on an irregular geological outcrop having no exposed flat plane, the clinocompass serves as a supporting member or a fixing member for the measurement of the strike and the dip on an irregular geological outcrop having no exposed flat plane. Accordingly, the clinocompass has a structure to measure the strike and the dip suitable for the geological structure and the orientation of the outcrop having no exposed flat plane, so that the strike and the dip are usefully measured.

SYSTEMS AND METHODS FOR MAGNETIC INTERFERENCE COMPENSATION OF AN EMBEDDED MAGNETOMETER

A method and apparatus for magnetic interference compensation of an embedded magnetometer. One embodiment provides a method for operating a mobile communications device that includes an electronic processor, a memory, and a magnetometer. In one exemplary embodiment, the method includes determining, by the electronic processor, an operational mode for the mobile communication device. The method further includes retrieving, from the memory and based on the operational mode, at least one predetermined calibration parameter. The method further includes obtaining, from the magnetometer, a magnetic field reading, and determining, by the electronic processor, a calibrated magnetic field value based on the magnetic field reading and the at least one predetermined calibration parameter. 1. A method for operating a mobile communications device that includes an electronic processor , a memory , and a magnetometer , the method comprising:determining, by the electronic processor, an operational mode for the mobile communication device;retrieving, from the memory and based on the operational mode, at least one predetermined calibration parameter;obtaining, from the magnetometer, a magnetic field reading; anddetermining, by the electronic processor, a calibrated magnetic field value based on the magnetic field reading and the at least one predetermined calibration parameter.2. The method of claim 1 , wherein the at least one predetermined calibration parameter includes at least one selected from the group consisting of at least one soft iron interference calibration parameter and at least one hard iron interference calibration parameter.3. The method of claim 1 , wherein determining at least one operational mode includes determining at least one selected from the group consisting of a radio network status claim 1 , a tethering status claim 1 , a screen backlight brightness claim 1 , a short-range wireless network status claim 1 , a media player status claim 1 , and a battery ...

Electronic timepiece

An electronic timepiece includes an indicating hand, a distance display hand, a GPS receiver that receives satellite signals transmitted from GPS satellites, a magnetic sensor, and a controller. The controller determines the direction to a destination on the basis of the satellite signals received by the GPS receiver, the output from the magnetic sensor, and destination information representing the position of the destination, determines the distance to the destination on the basis of the satellite signals and the destination information, causes the indicating hand to indicate the direction to the destination, and causes the distance display hand to display the distance to the destination.

ANNULAR FLUIDIC SYSTEM WITH COMPASS FUNCTION

An annular fluidic device includes a closed annular tube, wherein the tube includes at least one portion of transparent wall and contains a rigid torus bathed in a fluid filling the internal volume of the tube, in that the torus is arranged to be movable in the tube, and wherein at least one permanently polarised magnetic element integral with the torus allows it to undergo a moment of force causing it to be aligned in the direction of the external magnetic vector. A watch case can include this device. 1. An annular fluidic device comprising:an annular tube delimiting a closed internal volume,a fluid disposed in the closed internal volume,a floating system disposed in the closed internal volume and bathed in the fluid, said floating system being arranged to rotate freely around a central axis of the annular tube and relative to said annular tube, and said floating system having a marking with at least one of the four cardinal points,at least one permanently polarised magnetic element integral with the floating system allowing said floating system to undergo a moment of force causing it to be aligned in the direction of the external magnetic vector by rotating around of said central axis,said annular tube being transparent at least on a portion of its wall so as to visualise the marking of the floating system from the outside of the annular tube.2. The device according to claim 1 , wherein the floating system is a torus.3. The device according to claim 1 , wherein the floating system is a ring connecting several parts.4. The device according to claim 3 , wherein the parts are spheres.5. The device according to claim 1 , wherein said at least one permanently polarised magnetic element is a magnet overmoulded by the material of the floating system.6. The device according to claim 1 , wherein the device includes several permanently polarised magnetic elements distributed in an axisymmetric manner over the circumference of the floating system.7. The device according to ...

IMPROVED MAGNETIC COMPASS CARD

The balancing righting moments and dampening of the compass card and directive magnets in a liquid damped magnetic compass are separated to reduce the tilt and oscillation of the compass card when subjected to lateral acceleration, such as pitching and rolling in a seaway. The compass card is connected to the pivoted directive magnetic assembly by a card gimbal arrangement. The compass card is connected to the outer side of the gimbal ring rotating on a first axis. The magnetic assembly is connected to the inner side of the gimbal ring for rotation along a second axis oriented 90 degrees from the first axis. 1. A magnetic compass comprising:a liquid filled spherical compass bowl;a major gimbal within the bowl supporting a central pivot;a compass card;a magnet assembly; anda two-axis card gimbal, coupling the compass card to the magnet assembly;wherein the magnet assembly rests on and freely rotates about the central pivot.2. The magnetic compass as claimed in in which the two-axis card gimbal comprises a gimbal ring with inner swivel pins coupled to a housing of the magnet assembly and outer swivel pins coupling the gimbal ring to the compass card.3. The magnetic compass as claimed in in which the magnet assembly comprises two parallel cylindrical rare-earth magnets straddling the pivot axis and having a centre of mass below a pivot point of the central pivot.4. The magnetic compass as claimed in in which the magnet assembly comprises two parallel cylindrical rare-earth magnets straddling the pivot axis and having a centre of mass below a pivot point of the central pivot.5. The magnetic compass as claimed in in which the outer side of the gimbal ring is coupled to the compass card rotating on a first axis while the magnetic assembly is connected to the inner side of the gimbal ring rotating along a second axis oriented 90 degrees from the first axis. This invention relates to magnetic compasses that are used on marine vessels for indicating the orientation of the ...

LEVEL

A level includes a frame having a top planar surface, a bottom planar surface, and a web coupling the top planar surface to the bottom planar surface. The top planar surface and the bottom planar surface are parallel. The level further includes a vial supported by the frame. The vial has a longitudinal axis passing through a center of the vial and a body defining an interior containing a liquid and an indicator bubble. The level further includes a plurality of LEDs. Each of the LEDs has a light emitting point, and each of the plurality of LEDs is positioned adjacent an end of the vial and is oriented such that the light emitting point is positioned within the interior of the body of the vial. 1. A level , comprising:a frame including a top planar surface, a bottom planar surface, and a web coupling the top planar surface to the bottom planar surface, the top planar surface and the bottom planar surface being parallel;a vial supported by the frame, the vial having a longitudinal axis passing through a center of the vial and a body defining an interior containing a liquid and an indicator bubble; anda plurality of LEDs, each of the LEDs has a light emitting point, and each of the plurality of LEDs is positioned adjacent an end of the vial and is oriented such that the light emitting point is positioned within the interior of the body of the vial.2. The level of claim 1 , wherein the vial further includes a plurality of end caps with one of the end caps positioned at each end of the vial body claim 1 , wherein each of the end caps supports one of the plurality of LEDs relative to the vial.3. The level of claim 2 , wherein each of the end caps extends at least partially into the interior of the body claim 2 , wherein each of the end caps defines a well that extends at least partially into the interior of the body and at least partially receives the corresponding one of the plurality of LEDs.4. The level of claim 1 , wherein each of the plurality of LEDs is aligned along ...

North Orienting Device

A device capable of measuring the vector sum of the centripetal acceleration of the rotation of the Earth (or that of any other planet in a planetary system) around its axis (a.sub.rot) and the centripetal acceleration of the planet's revolution in its orbit around the Sun (a.sub.rev) and a method for performing the same using the measured physical data to calculate the latitude and longitude of the device on a surface. Measurements are taken by stepping accelerometers through different axis to determine centripetal acceleration, reading the output of the accelerometers and reading the angular disposition of the accelerometers using encoders and calculating the latitude and longitude from the measured data. 1. A location measurement device for use in stationary applications comprising: a reference member having at least two degrees of freedom and coupled to a frame , wherein the reference member includes a rotatable end; an arm pivotably coupled to the rotatable end and having an axis; a rotatable head rotatably coupled to the arm , wherein the rotatable head includes a first inertial measurement device configured to measure acceleration parallel to the axis of the arm and a second inertial measurement device configured to measure acceleration perpendicular to the axis of the arm; and a computation module configured to determine a position of the reference member relative to a body based on at least one measurement of the first inertial measurement device while the frame is stationary.2. The device of claim 1 , wherein one end of the reference member comprises a weighted end claim 1 , and wherein the device further comprises a locking mechanism configured to lock the reference member to the frame.3. The device of claim 1 , wherein the computation module is further configured to: align the reference member to a gravitational vector associated with the body; rotate the reference member and the arm to a first position where an acceleration reading of the first inertial ...

MAGNETIC SENSOR CALIBRATION FOR AIRCRAFT

A method of magnetic sensor calibration for aircraft comprises obtaining attitude data, heading angle data, position data, and date information; inputting the position data and date into an earth magnetic field (EMF) model and into an EMF model correction map; inputting the attitude and heading angle data into a NOLL to body frame transformation module; outputting an EMF model vector from the EMF model; outputting an EMF correction vector from the EMF model correction map; compensating the EMF model vector with the EMF correction vector to produce a corrected EMF model vector; inputting the corrected EMF model vector into the transformation module; inputting magnetic field measurements data into a calibration processing unit; inputting true earth magnetic field data from the transformation module into the processing unit; computing compensation coefficients in the processing unit based on the magnetic field measurements and the true earth magnetic field; and storing the compensation coefficients. 1. A method of magnetic sensor calibration for an aircraft , the method comprising:obtaining attitude data, heading angle data, position data, and date information for the aircraft;inputting the position data and the date information into an earth magnetic field model;inputting the position data and the date information into an earth magnetic field model correction map;inputting the attitude data and the heading angle data into a north oriented local level (NOLL) to body frame transformation module;outputting an earth magnetic field model vector from the earth magnetic field model;outputting an earth magnetic field model correction vector from the earth magnetic field model correction map;compensating the earth magnetic field model vector with the earth magnetic field model correction vector to produce a corrected earth magnetic field model vector;inputting the corrected earth magnetic field model vector into the NOLL to body frame transformation module;inputting magnetic ...

CALIBRATING A GYROSCOPE BASED ON VISUAL CODES

Visual codes are scanned to assist navigation. The visual code may be a Quick Response (QR) code that contains information useful to calibrating a variety of navigation-based sensors such as gyroscopes, e-compasses, and barometric pressure sensors. In an embodiment, an imaging device, an gyroscope, and a processor are elements of a system. The processor is coupled to the imaging device and the gyroscope. The processor causes the imaging device to scan a visual code. Based on scanning the visual code, the processor causes the gyroscope to be calibrated. 136-. (canceled)37. A system , comprising:an imaging device;a gyroscope; anda processor coupled to the imaging device and the gyroscope, wherein the processor causes the imaging device to scan a visual code and, based on scanning the visual code, the processor causes the gyroscope to be calibrated.38. The system of wherein the processor uses the imaging device to read position and heading values from the visual code and use the position and heading values with signals from the gyroscope to determine position and heading of the system.39. A method claim 37 , comprising:initiating scanning using a digital image device;detecting the presence of a visual code; andbased on detecting the visual code, calibrating a gyroscope.40. The method of further comprising reading position and heading values from the visual code.41. The method of further comprising determining new position and heading based on the position and heading values read from the visual code and measurements from the gyroscope. This application is a Divisional of and claims priority to U.S. patent application Ser. No. 13/571,501, filed on Aug. 10, 2012, which in turn claims priority to U.S. Provisional Patent Application No. 61/522,112 filed on Aug. 10, 2011. Said applications are hereby incorporated herein by reference.Many applications for smartphones use location information. Many smartphones include a global navigation satellite system (GNSS) such as the ...

CLINOMETER AND METHOD FOR MEASURING STRIKE AND DIP ANGLE USING SAME

A clinometer including a base plate and a compass which is mounted on the base plate and can measure a strike and a dip angle. The compass includes a first case which is rotationally provided on the base plate so as to move a strike scale indicated on the rim of the compass to a certain position and a second case which is provided in the first case, and which is fixed on the base plate so as to fix a dip scale indicated on the rim of the compass at a certain position. 1. A clinometer comprising:a base plate; anda compass disposed on the base plate to measure strike and dip angles, a first case rotatably disposed on the base plate to move a strike scale displayed on a rim of the compass to a specific position; and', 'a second case disposed within the first case, the second case being fixed to the base plate to previously fix a dip scale displayed on the rim of the compass at a specific position., 'wherein, the compass comprises2. The clinometer of claim 1 , wherein the second case comprises:a strike measurement needle rotating a magnetic force to indicate the strike scale; anda dip measurement ball moving by the gravity to indicate the dip scale.3. The clinometer of claim 2 , wherein the dip measurement ball is formed of a copper material.4. The clinometer of claim 2 , wherein the second case is filled within a transparent inducing solution that prevents the strike measurement needle from vertically moving to induce horizontal rotation of the strike measurement needle.5. The clinometer of claim 1 , wherein the dip scale is displayed on a semicircular rim claim 1 , andeach of both ends of a horizontal line that is perpendicular to both side surfaces that correspond to the longitudinal axis of the base plate is defined as an angle of 0°, an angle gradually increases in a direction of a lower end of a vertical line that is perpendicular to the horizontal line, and the lower end of the vertical line is defined as an angle of 90°.6. The clinometer of claim 1 , further ...

Self-Contained Holonomic Tracking Method and Apparatus for Non-Destructive Inspection

A self-contained, holonomic motion tracking solution for supplementing the acquisition of inspection information on the surface of a structure, thereby enabling the real-time production of two-dimensional images from hand-held and automated scanning by holonomic-motion of non-destructive inspection (NDI) sensor units (e.g., NDI probes). The systems and methods disclosed enable precise tracking of the position and orientation of a holonomic-motion NDI sensor unit (hand-held or automated) and conversion of the acquired tracking data into encoder pulse signals for processing by a NDI scanning system. 1. A method for tracking a device that is coupled to a plurality of omni wheels , comprising:(a) converting rotation of each omni wheel into respective encoder data;(b) computing an absolute angle representing an orientation of the device relative to a coordinate system of the surface based in part on said encoder data;(c) computing relative changes in X and Y positions of the device relative to said coordinate system of the surface based in part on said encoder data; and(d) computing an absolute position of the device relative to said coordinate system of the surface based in part on said computed absolute angle and said computed changes in X and Y positions.2. The method as recited in claim 1 , wherein steps (b) through (d) are repeated at regular intervals of time to provide absolute angles and absolute positions of the device over a period of time.3. The method as recited in claim 1 , further comprising using said computed absolute angle and absolute position to position and orient a three-dimensional model of the device in a virtual environment.4. The method as recited in claim 1 , wherein the computations of steps (b) through (d) take into account that the device has a four-omni wheel claim 1 , perpendicular claim 1 , double-differential configuration.5. The method as recited in claim 1 , wherein the computations of steps (b) through (d) take into account that the ...

DIRECTIONAL SHOCKPROOF TILTING DISPLAY TAG

A directional shockproof tilting display tag, comprising a container provided with a detector therein; the detector comprises a first placement chamber, a second placement chamber, and a baffle; the first placement chamber comprises a first side plate and a first mass block; the first side plate is externally provided with a first extension portion; the second placement chamber comprises a second side plate and a second mass block; the second side plate is externally provided with a second extension portion; the placement chambers are also provided with bar codes; part of the patterns of the bar codes are covered by the mass blocks; a rotary shaft is disposed directly above the placement chambers; the container is also provided with a shockproof structure therein. The display tag has a simple structure and strong shockproof capability. The arrangement of the bar codes ensures the detector can quickly detect an object tilting. 1. A directional shockproof tilting display tag , characterized in that:the tilting display tag comprises a container provided with a detector therein; the detector comprises a first placement chamber, a second placement chamber, and a baffle; the first placement chamber and the second placement chamber are integrally provided, with the baffle disposed between the first placement chamber and the second placement chamber; the first placement chamber comprises a first side plate and a first mass block, wherein the first side plate is disposed on the external side of the first placement chamber, and the first mass block is disposed within a cavity formed by the first side plate and the first placement chamber; the second placement chamber comprises a second side plate and a second mass block, wherein the second side plate is disposed on the external side of the second placement chamber, and the second mass block is disposed within a cavity formed by the second side plate and the second placement chamber;a rotary shaft is disposed directly above ...

BUILDING MODELLING SYSTEM

The present invention relates to a system and method for modelling the physical characteristics of a building. Models of buildings, such as floor plans, are often produced when renovation work or other work is planned. Manual measurements maybe taken (e.g. using a tape measure or an optical distance meter), and these measurements are subsequently used by a draftsman to construct a model of the measured space. This is time consuming. The present invention provides a system and method which includes a measurement and modelling process which assigns a unique identifier to openings that are shared by adjoining rooms when plotting measurements. These room associations are then used to determine the layout of the rooms within a building model. There is significantly less time and cost involved in generating a computer model of the measured space, using the present system and method. 141-. (canceled)42. A structure modelling system comprising:a measurement tool configured to survey a structure having a plurality of rooms, the measurement tool having a spatial sensor that maps room boundaries; anda modelling tool that generates a computer model of the structure from measurements of individual rooms generated by the measurement tool, the modelling tool assigning a unique identifier to each opening that is shared by adjoining rooms, each unique identifier defining a room association within the structure, the modelling tool using the room associations to determine the layout of rooms within a structure model.43. The system of claim 42 , wherein the measurement tool comprises an orientation sensor that determines the orientation of each spatial measurement with respect to an absolute reference.44. The system of claim 42 , wherein the measurement tool comprises a positioning system that determines a geographical position of the measurement tool claim 42 , the measurement tool encoding structure measurements with a geographical stamp that identifies a geographical position of the ...

Magnetometer Accuracy and Use

A parameter related to the Earth's magnetic field can be used to determine accuracy of a magnetometer of a mobile device. In one aspect, a first instance of a parameter related to Earth's magnetic field is determined using data generated by the magnetometer. The magnetometer data can be based in part on a position of the mobile device with respect to the Earth. A second instance of the parameter can be determined using data generated by a model of Earth's magnetic field. The model data can also be based in part on the position of the mobile device with respect to the Earth. The first instance of the parameter can be compared with the second instance of the parameter. An accuracy metric for the magnetometer can be determined based on a result of the comparison. An indication of the accuracy metric can be presented by the mobile device. 1determining an accuracy metric based on magnetometer measurements output by the magnetometer during a calibration or recalibration procedure; andpresenting an indication of the accuracy metric on the mobile telephone.. A method performed by a processor of a mobile telephone having a magnetometer, the method comprising: This application is a continuation of and claims priority to U.S. application Ser. No. 13/669,403, entitled “Magnetometer Accuracy and Use,” filed Nov. 5, 2012, which is a continuation of U.S. application Ser. No. 13/301,650, entitled “Magnetometer Accuracy and Use,” filed Nov. 21, 2011, now abandoned, which is a continuation of U.S. application Ser. No. 13/030,067, entitled “Magnetometer Accuracy and Use,” filed Feb. 17, 2011, now U.S. Pat. No. 8,061,049, which is a continuation of U.S. application Ser. No. 12/479,717, entitled “Magnetometer Accuracy and Use,” filed Jun. 5, 2009, now U.S. Pat. No. 7,891,103, the entire contents of each of which are incorporated herein by reference.This subject matter is related generally to magnetometers.A mobile device such as a cellular phone or a smart phone, PDA, handheld computer, ...

ELECTRONIC TIMEPIECE

An electronic timepiece includes an indicating hand, a distance display hand, a GPS receiver that receives satellite signals transmitted from GPS satellites, a magnetic sensor, and a controller. The controller determines the direction to a destination on the basis of the satellite signals received by the GPS receiver, the output from the magnetic sensor, and destination information representing the position of the destination, determines the distance to the destination on the basis of the satellite signals and the destination information, causes the indicating hand to indicate the direction to the destination, and causes the distance display hand to display the distance to the destination. 1. An electronic timepiece comprising:a first indicating hand;a second indicating hand;a receiver that receives position identification information for identifying a current position;a magnetic sensor; anda controller that determines a direction to a destination based on the position identification information received by the receiver, an output from the magnetic sensor, and destination information representing a position of the destination and determines a distance to the destination based on the position identification information and the destination information,wherein the first indicating hand indicates the direction to the destination, and the second indicating hand displays the distance to the destination.2. The electronic timepiece according to claim 1 , wherein the controller switches claim 1 , in accordance with the distance to the destination claim 1 , a display range of the distance to the destination displayed with the second indicating hand.3. The electronic timepiece according to claim 2 ,further comprising a third indicating hand,wherein the third indicating hand displays the display range.4. An electronic timepiece comprising:a first indicating hand;a second indicating hand;a receiver that receives position identification information for identifying a current ...

DEVICE AND METHOD FOR SURVEYING BOREHOLES OR ORIENTING DOWNHOLE ASSEMBLIES

A heading transfer unit may be used to transfer a heading from a surface base to a MWD tool. The surface base may have a master north finder to determine a heading. The heading may be transferred to the heading transfer unit, which is in turn transferred to the MWD unit. The heading on the heading transfer unit is transferred to the MWD tool. 1. A method comprising:providing a master north finder, the master north finder positioned at the surface and coupled to a surface base;determining a heading with respect to true north and gravity with the master north finder; a non-transitory, tangible, computer readable memory media adapted to store the heading; and', 'a base alignment feature, the base alignment feature coupleable to the surface base;, 'transferring the heading to a heading transfer unit, the heading transfer unit includingtransferring the heading transfer unit to a MWD tool, the MWD tool including a MWD interface having a MWD interface alignment feature, such that the base alignment feature engages the MWD interface alignment feature; andtransferring the heading from the heading transfer unit to the MWD tool.2. The method of claim 1 , wherein the heading transfer unit further comprises one or more sensors claim 1 , and wherein the operation further comprises measuring the change in heading of the heading transfer unit as the heading transfer unit is transferred to the MWD tool.3. The method of claim 2 , further comprising using the sensors of the heading transfer unit by the MWD tool.4. The method of claim 1 , wherein transferring the heading transfer unit to the MWD tool comprises lowering the heading transfer unit through a tubular string by wireline or slickline.5. The method of claim 1 , wherein transferring the heading transfer unit to the MWD tool comprises dropping or pumping the heading transfer unit through a tubular string.6. The method of claim 1 , wherein transferring the heading to a heading transfer unit comprises coupling the heading transfer ...

Level

A level includes a frame having a top planar surface, a bottom planar surface, and a web coupling the top planar surface to the bottom planar surface. The top planar surface and the bottom planar surface are parallel. The level further includes a vial supported by the frame. The vial has a longitudinal axis passing through a center of the vial and a body defining an interior containing a liquid and an indicator bubble. The level further includes a plurality of LEDs. Each of the LEDs has a light emitting point, and each of the plurality of LEDs is positioned adjacent an end of the vial and is oriented such that the light emitting point is positioned within the interior of the body of the vial. 1. A level , comprising:a frame including a top planar surface, a bottom planar surface, and a web coupling the top planar surface to the bottom planar surface, the top planar surface and the bottom planar surface being parallel; a vial body defining an interior;', 'a liquid located within the interior;', 'an indicator bubble located within the interior; and', 'a UV sensitive component reactive to UV light to increase visibility of a portion of the vial assembly; and, 'a vial assembly supported by the frame, the vial assembly comprisinga UV light source supported by the frame and positioned to direct UV light such that the UV light from the UV light source interacts with the UV sensitive component.2. The level of claim 1 , wherein the UV sensitive component emits visible light in response to absorption of UV light from the UV light source.3. The level of claim 1 , wherein the UV sensitive component is a component of the vial assembly that includes a UV reactive additive embedded in the component.4. The level of claim 1 , wherein the UV sensitive component is a sleeve located within the interior of the vial body and surrounding the indicator bubble claim 1 , the sleeve is formed from a material and the sleeve comprises a UV reactive additive embedded in the material of the ...

GEOLOCATION SENSOR

Geolocation sensor devices, methods, and systems are described herein. One geolocation sensor device includes an optical position sensor configured to receive sunlight and determine a current angular position of the sun relative to the geolocation sensor device based, at least in part, on the received sunlight, a memory, and a processor configured to execute executable instructions stored in the memory to determine a current location of the geolocation sensor device based, at least in part, on the determined current angular position of the sun and a current time of day. 1. A geolocation sensor device , comprising: receive sunlight; and', 'determine a current angular position of the sun relative to the geolocation sensor device based, at least in part, on the received sunlight;, 'an optical position sensor configured toa memory; anda processor configured to execute executable instructions stored in the memory to determine a current location of the geolocation sensor device based, at least in part, on the determined current angular position of the sun and a current time of day.2. The geolocation sensor device of claim 1 , wherein the geolocation sensor device includes a user interface configured to display the determined current location of the geolocation sensor device.3. The geolocation sensor device of claim 1 , wherein the geolocation sensor device includes a time element configured to determine the current time of day.4. The geolocation sensor device of claim 1 , wherein:the geolocation sensor device includes a compass sensor configured to determine a current relative cardinal direction of the geolocation sensor device; andthe processor is configured to execute the instructions to determine the current location of the geolocation sensor device based, at least in part, on the determined current relative cardinal direction of the geolocation sensor device.5. The geolocation sensor device of claim 4 , wherein the compass sensor is configured to determine the current ...

ELECTRONIC WATCH

An electronic watch includes a display surface, a magnetic sensor including a first detection axis and a second detection axis orthogonal to the first detection axis, with the first detection axis and the second detection axis being disposed in a plane parallel to the display surface, a correction unit configured to correct an error due to an offset magnetic field included in a detection value of the magnetic sensor, a calculation unit configured to calculate a bearing and magnetic intensity, based on a value acquired by correcting the detection value by the correction unit, and a display unit configured to cause the display surface to display the bearing and the magnetic intensity that are calculated by the calculation unit to be displayed. 1. An electronic watch , comprising:a display surface;a magnetic sensor including a first detection axis and a second detection axis orthogonal to the first detection axis, the first detection axis and the second detection axis being disposed in a plane parallel to the display surface; anda CPU configured tocorrect an error, due to an offset magnetic field, included in a detection value of the magnetic sensor,calculate a bearing and magnetic intensity, based on a value acquired by correcting the detection value, andcause the display surface to display the calculated bearing and the calculated magnetic intensity.211. The electronic watch according to claim , whereinthe display surface includes a first pointer configured to indicate the bearing and a second pointer configured to indicate the magnetic intensity, andthe CPU causes the first pointer and the second pointer to indicate the calculated bearing and the calculated magnetic intensity, respectively.3. The electronic watch according to claim 2 , wherein the display surface includes an indicator configured to indicate the magnetic intensity.4. The electronic watch according to claim 1 , whereinthe display surface includes a first pointer configured to indicate the bearing and ...

ELECTRONIC WATCH

An electronic watch includes a navigation processor that perform navigation processing of causing a positioning processor to perform positioning processing, and calculating a distance to a destination based on current position information acquired by the positioning processing and destination position information, and also calculating a direction of the destination based on current position information, geomagnetism, and destination position information, and moreover causing a display unit to display the direction of the destination, and an operation device configured to case the navigation processor to start navigation processing when a predetermined operation is performed. The navigation processor performs, when the distance is longer than a preset threshold, the navigation processing at a first frequency during a predetermined time after predetermined operation is performed, and performs, when the distance is shorter than or equal to a preset threshold, the navigation processing at a second frequency higher than first frequency during the predetermined time. 1. An electronic watch comprising:a receiver configured to receive a satellite signal;a positioning processor configured to acquire, based on the received satellite signal, current position information including latitude information and longitude information of a current position;a magnetic sensor configured to detect geomagnetism;a destination storage unit configured to store destination position information including latitude information and longitude information of a destination;a navigation processor configured to perform navigation processing of causing the positioning processor to perform positioning processing, and calculating a distance to the destination based on the current position information acquired by the positioning processing and the destination position information, and also calculating a direction of the destination based on the current position information, the geomagnetism, and the ...

Method and System for Detecting a State of a Golf Club

A method for detecting a lost club includes detecting an orientation characteristic of a golf club with a detection unit, transmitting the orientation characteristic from the detection unit to a mobile device, determining a distance between the golf club and the mobile device based on a signal transmitted from the detection unit to the mobile device and determining a lost club state based on the orientation characteristic of the golf club and the distance between the golf club and the mobile device. 1. A system comprising:a detection unit including at least one motion analyzer configured to measure one or more motion characteristics of a golf club, wherein the detection unit is mechanically coupled to an end region of the golf club,wherein the detection unit includes a communication module communicatively coupled to the at least one motion analyzer and configured to transmit one or more motion characteristics from the detection unit; andone or more processors of a mobile communications device suitable for executing program instructions stored in a memory medium, wherein the program instructions are configured to cause the one or more processors to receive the detected one or more motion characteristics of the golf club transmitted by the communication module, the program instructions further configured to cause the one or more processors to identify one or more club swings of the golf club by a user.2. The system of claim 1 , wherein the program instructions are further configured to cause the one or more processors to record the number of club swings by the user.3. The system of claim 1 , wherein the program instructions are further configured to cause the one or more processors to record the one or more club swings by the user and a time of each club swing by the user.4. The system of claim 4 , further comprising:displaying the one or more identified club swings by the user on a display as function of time of the one or more identified club swings.5. The system of ...

FLUID OR LOW FRICTION PERMANENT MAGNET COMPASS

Low friction or nearly frictionless compasses are provided. One compass embodiment includes a housing having a wall forming a chamber, the housing having a closed end and an open end. The compass includes a fluid disposed within the chamber. The compass includes a magnetized material floating in the fluid, wherein the magnetized material is operative to indicate Earth's magnetic north. The compass includes a protective face adjacent to the open end, wherein the protective face closes the open end of the chamber. Also provided is a compass that includes low friction material deposited on at least one side of the magnetized material and the adjacent closed end of the housing to create a nearly frictionless interface. 1. A compass comprising:a housing having a wall forming a chamber, the housing having a closed end and an open end;a fluid disposed within the chamber;a magnetized material floating in the fluid, wherein the magnetized material is operative to indicate Earth's magnetic north; anda protective face adjacent to the open end, wherein the protective face closes the open end of the chamber.2. The compass of claim 1 , wherein the magnetized material has a density that is less than a density of the fluid disposed within the chamber.3. The compass of claim 1 , wherein the magnetized material is selected from neodymium iron boron or samarium-cobalt.4. The compass of claim 1 , wherein the magnetized material further includes a coating claim 1 , the coating including a material having a density that is less than the density of the fluid.5. The compass of claim 4 , wherein the material is selected from graphite claim 4 , nearly frictionless carbon claim 4 , polytetrafluoroethylene claim 4 , and combinations thereof.6. The compass of claim 1 , wherein the magnetized material includes a hollow portion.7. The compass of claim 6 , wherein the hollow portion is sealed and filled with air.8. The compass of wherein the hollow portion is filled with a material having a ...

METHOD AND DEVICE FOR DETERMINING A TRANSVERSE GRADIENT OF A ROAD SURFACE ON WHICH A TWO-WHEELER TRAVELS

A method for determining a transverse gradient of a road surface, on which a two-wheeler travels, the two-wheeler having at least one wheel, whose rolling circumference changes as a function of an inclination of the two-wheeler relative to the road surface, an inclination of the two-wheeler relative to the road surface being determined from a variable, which depends on the rolling circumference of the at least one wheel, and the transverse gradient of the road surface being determined from the tilt of the two-wheeler and the inclination relative to the road surface. A corresponding device and a computer program product are also described. 110-. (canceled)11. A method for determining a transverse gradient of a road surface on which a two-wheeler travels , the method comprising:determining an inclination of the two-wheeler, the two-wheeler having two wheels, each having a rolling circumference, the rolling circumference of at least one wheel of the two wheels changing as a function of an inclination of the two-wheeler relative to the road surface, relative to the road surface from a variable, which depends on the rolling circumference of the at least one wheel;determining a tilt of the two-wheeler; andascertaining the transverse gradient of the road surface from the tilt of the two-wheeler and the inclination of the two-wheeler relative to the road surface.12. The method of claim 11 , wherein the inclination of the two-wheeler relative to the road surface is determined based at least partially on a comparison of the variable claim 11 , which depends on the rolling circumference of the at least one wheel claim 11 , with at least one reference value.13. The method of claim 12 , wherein the reference value is defined at least one of by using a learning function and by using at least one variable which describes the at least one wheel.14. The method of claim 11 , wherein at least one of the at least one wheel speed value and one variable claim 11 , depending on the at ...

ELECTRONIC TIMEPIECE

An electronic timepiece includes a magnetic sensor that serves as a magnetic detection unit, a GPS reception unit that serves as a reception unit receiving positional information of a current position, a time zone setting unit that sets a time zone, a specifying unit that specifies a declination angle based on the positional information of the current position, a decision unit that decides a direction of a due north based on an output of the magnetic sensor and a declination angle, and an azimuth display unit that displays the direction of the due north decided by the decision unit. 1. An electronic timepiece comprising:a magnetic detection unit;a reception unit that receives positional information of a current position;a specifying unit that specifies a declination angle based on the positional information;a decision unit that decides a direction of a due north based on a output of the magnetic detection unit and a declination angle; andan azimuth display unit that displays the direction of the due north decided by the decision unit.2. The electronic timepiece according to claim 1 , further comprising:a time zone setting unit that sets a time zone,wherein the specifying unit specifies the declination angle based on the positional information used when the time zone setting unit sets the time zone.3. The electronic timepiece according to claim 1 , further comprising:a declination angle display unit that displays the declination angle specified by the specifying unit; anda declination angle adjustment unit that adjusts the declination angle displayed by the declination angle display unit.4. The electronic timepiece according to claim 1 ,wherein the specifying unit specifies the declination angle using a geomagnetism distribution.5. The electronic timepiece according to claim 1 , further comprising:a storage unit that stores a declination angle table in which a plurality of declination angles are associated with a plurality of pieces of positional information,wherein ...

TIMEPIECE AND INDICATING HAND CONTROL METHOD

A timepiece includes a display unit including a first indicating hand and a dial so as to display a time, in which the dial has a first scale having a number for showing an absolute value of a positive numerical value within a plurality of numerical values indicated by the first indicating hand, a second scale having a number for showing an absolute value of a negative numerical value within the plurality of numerical values, a first sign for showing that the numerical value indicated by the first indicating hand is positive, and a second sign for showing that the indicated numerical value is negative. 1. A timepiece comprising:a display unit including a first indicating hand and a dial so as to display a time, a first scale having a number for showing an absolute value of a positive numerical value within a plurality of numerical values indicated by the first indicating hand;', 'a second scale having a number for showing an absolute value of a negative numerical value within the plurality of numerical values;', 'a first sign for showing that the numerical value indicated by the first indicating hand is positive, and', 'a second sign for showing that the indicated numerical value is negative., 'the dial has2. The timepiece according to claim 1 ,wherein a shortest distance from the first scale to the first sign is shorter than a shortest distance from the first scale to the second sign, andwherein a shortest distance from the second scale to the second sign is shorter than a shortest distance from the second scale to the first sign.3. The timepiece according to claim 1 , further comprising:a barometric pressure sensor,wherein the first indicating hand indicates a variation per unit time in an altitude based on barometric pressure measured by the barometric pressure sensor by using the first scale or the second scale.4. The timepiece according to claim 1 , further comprising:a barometric pressure sensor,wherein the first indicating hand indicates the first sign in a ...

LIFTING MOTION EVALUATION

Locations of a person's hand, shoulder and hip in three-dimensional space are received from a three-dimensional position sensing device. A shortest distance from the location of the person's hand to a line between the location of the person's shoulder and the location of the person's hip is determined. The shortest distance is compared to a threshold to determine if the person is overreaching. When it is determined that the person is overreaching, a user interface is provided to indicate that the person was overreaching. Additional location information for points on the person's body are used to determine if the person is performing a high lift, a low reach or a twist. 1. A method comprising:receiving locations of a person's hand, shoulder and hip in three-dimensional space from a three-dimensional position sensing device;determining a shortest distance from the location of the person's hand to a line between the location of the person's shoulder and the location of the person's hip;comparing the shortest distance to a threshold to determine if the person is overreaching;when it is determined that the person is overreaching, providing a user interface to indicate that the person was overreaching.2. The method of further comprising:receiving the location of two points on the person's body from the three-dimensional position sensing device;determining a distance between the two points; andsetting the threshold based on the distance between the two points.3. The method of wherein one of the two points is the person's wrist and another of the two points is the person's elbow.4. The method of wherein the threshold is set to about one hundred fifty percent of the distance between the person's wrist and the person's elbow.5. The method of further comprising:determining an angle between a line from the location of the person's hand to the location of the person's shoulder and a line from the location of the person's shoulder to the location of the person's hip;comparing the ...

TRANSITIONING FROM STATIONARY ALIGNMENT MODE TO IN-MOTION ALIGNMENT MODE

A navigation system to transition from a stationary alignment filter to an in-motion alignment filter is provided. The system comprises a processing unit configured to implement a stationary alignment Kalman filter (SAKF) in gyrocompass alignment mode to generate state estimates and provide corrections when the object is stationary, and to implement an algorithm to compute a covariance for the SAKF that accounts for uncertainty in the SAKF estimates; wherein the processing unit is further configured to implement a continuous alignment filter (CAF) that generates a secondary solution which remains unaffected by the SAKF corrections during a delay period accommodating a delay between the time of actual motion to the time of detected motion, and to implement an algorithm to compute a covariance for CAF that accounts for the uncertainty in CAF during delay period; and wherein outputs of the CAF and its covariance are communicated to an in-motion alignment filter. 1. A navigation system for a vehicle , the navigation system comprising:a processing unit, wherein the processing unit is configured to implement a stationary alignment Kalman filter (SAKF) in a gyrocompass alignment mode to generate state estimates and provide corrections when the object is stationary, and wherein the processing unit is further configured to implement an algorithm to compute a covariance for the SAKF that accounts for uncertainty in the SAKF estimates;wherein the processing unit is further configured to implement a continuous alignment filter (CAF) that generates a secondary solution which remains unaffected by the SAKF corrections during a delay period from a time of actual motion to a time of detected motion, and wherein the processing unit is further configured to implement an algorithm to compute a covariance for CAF that accounts for the uncertainty in CAF during the delay period; andwherein outputs of the CAF and its covariance are communicated to an in-motion alignment filter.2. The ...

ORIENTATION INDICATION DEVICE

An orientation indicating device, the device comprises an enclosure, a plurality of rods fixed together at their one end forming a rod structure. The rod structure is rotatably mounted inside the enclosure. At least one roller provisioned in-between an inner surface of the enclosure and a free end of each of the plurality of rods. Further, at least one rod of the plurality of rods is configured to be heavier than the other rods, and said heavier rod is adapted to point towards gravity. 1100. An orientation indicating device () comprising:{'b': '8', 'an enclosure ();'}{'b': 1', '2', '3', '4', '5', '6', '101', '101', '8, 'a plurality of rods (, , , , and ) fixed together at their one end, forming a rod structure () wherein, the rod structure () is rotatably mounted inside the enclosure ();'}{'b': 7', '8', '1', '2', '3', '4', '5', '6', '101, 'at least one roller () provisioned in-between an inner surface of the enclosure () and a free end of each of the plurality of rods (, , , , and ) of the rod structure ();'}{'b': 1', '2', '3', '4', '5', '6, 'wherein, at least one rod of the plurality of rods (, , , , and ) is configured to be heavier than the other rods, and said heavier rod is adapted to point towards gravity.'}21007101. The orientation indicating device () as claimed in wherein claim 1 , the center of the rollers () are equidistant from the center of the rod structure ().3100123456127. The orientation indicating device () as claimed in claim 1 , wherein each of the plurality of rods ( claim 1 , claim 1 , claim 1 , claim 1 , and ) comprises a provision () at the free end to accommodate at least one roller ().41007. The orientation indicating device () as claimed in wherein claim 1 , shape of the at least one roller () is spherical.5100. The orientation indicating device () as claimed in wherein claim 3 , shape of the provision is hemi-sphere.61008. The orientation indicating device () as claimed in wherein claim 1 , shape of the enclosure () is spherical.71008. ...

SHARING LINKS IN AN AUGMENTED REALITY ENVIRONMENT

Various embodiments provide methods and systems for users and business owners to share content and/or links to visual elements of a place at a physical location, and, in response to a user device pointing at a tagged place, causing the content and/or links to the visual elements of the place to be presented on the user device. In some embodiments, content and links are tied to specific objects at a place based at least in part upon one of Global Positioning System (GPS) locations, Inertial Measurement Unit (IMU) orientations, compass data, or one or more visual matching algorithms. Once the content and links are attached to the specific objects of the place, they can be discovered by a user with a portable device pointing at the specific objects in the real world. 1. A computer-implemented method , comprising:acquiring, by a computing device, an image of at least a partial view of a point of interest, the image corresponding to a point of view of an image capture element of the computing device and including one or more visual features;identifying the point of interest, based on at least in part on a comparison of the one or more visual features to a plurality of candidate images and a respective confidence score of at least one candidate image;causing at least one of a link or content to be presented on an interface layer of the computing device, the interface layer including at least one overlay level over a live video or still image view and at least one level of transparency; andenabling customization of the interface layer corresponding to the point of interest by association of one or more additional links or additional content to the point of interest and presentation of the one or more additional links or additional content on the interface layer.2. The computer-implemented method of claim 1 , wherein the causing at least one of a link or content to be presented on the interface layer of the computing device is based at least in part upon a distance between ...

Vial with Improved Visibility for Level

A level including level vial(s) having enhanced visibility are provided. The level may include a level vial including a material that is attracted to the interface or border of a globule within the level vial which improves visibility of the interface. The level may include a solid level indicator having easy to see end surfaces that are generally vertically oriented when in the level position. The end surfaces of the solid level indicator may allow the user to more easily compare the position of the solid level indicator to indicating lines formed on the level vial. The level may include a level vial including a first liquid and an immiscible second liquid forming a globule with the first material. The globule formed from the second material may improve visibility compared to a typical air bubble. 1. A level comprising:a level body defining a planar base surface configured to engage a workpiece;a vial supported by the level body and including an inner surface defining a cavity;a first material located within the cavity of the vial, wherein the first material is a liquid material;a second material located within the cavity of the vial, the second material forms an indicator within the first material such that an interface is defined between the first and second materials; anda third material located within the cavity of the vial, the third material having a property that attracts the third material to the interface between the first material and the second material.2. The level of claim 1 , wherein the second material is air claim 1 , and the property of the third material is a density claim 1 , wherein the density of the third material is less than a density of the first material such that the third material floats on the first material and is located between the first material and the second material.3. The level of claim 1 , wherein the property of the third material is polarity claim 1 , wherein the first material is a polar material and the third material is ...

SYSTEM AND METHOD FOR CALIBRATION AND ACCURACY OF DEVICE SENSORS AND RELATED EXPERIENCES

The system of the present disclosure has an algorithm that can correct sensor data for one or more devices, such as mobile devices. The system comprises one or more of the devices, a cloud or server, and algorithms. The algorithm can be resident on the devices, the cloud, or both. The algorithm receives data from one or more sensors on each device, and supplies a data set back to the device, along with corrected data that adjusts any error in the sensors on the device. In this way, the system and algorithm of the present disclosure can account for and correct erroneous sensor data on a user's device, thus enhancing the user's experience with the device. The algorithm may also supply an overlay or data set to the device, and can allow the user to manipulate it. 1. A system for correcting sensor data of a user device , comprising:a device comprising a sensor;a computing cloud, wherein said user device is in communication with said computing cloud; andan algorithm resident on said user device, said computing cloud, or both of said user device and said computing cloud,wherein said algorithm acquires sensor data from said sensor, transmits a data set back to said user device, calculates an offset error in said sensor data based on said data set, and transmits corrected offset data back to said user device.2. The system of claim 1 , wherein said sensor data is implicit claim 1 , explicit claim 1 , or a combination of the two.3. The system of claim 2 , wherein said algorithm calculates said offset error based on said implicit data claim 2 , said explicit data claim 2 , or a combination of the two.3. The system of claim 1 , wherein a first portion of said algorithm is resident on said device claim 1 , and a second portion of said algorithm is resident on said computing cloud.4. The system of claim 1 , wherein said device is a plurality of devices claim 1 , each of which is in communication with said computing cloud.5. The system of claim 4 , wherein said algorithm transmits ...

Device for a compass

According to an example aspect of the present invention, there is provided a device for a compass, the device comprising a support comprising a magnetic field detection means being mounted via a conical pivot bearing on a tip of a shaft, wherein the detection means is capable of rotating in at least a plane which is perpendicular to the direction of the shaft, a direction indicator device connected to the magnetic field detection means, and wherein the support comprises an upper portion, a middle portion and a lower portion, the direction indicator device comprises an elongate plate with a direction indicator, wherein the middle portion of said support extends through an opening in the plate, the upper portion of said support comprises opposite first members extending over the top surface of said plate, and the lower portion of said support comprises opposite second members extending under the bottom surface of said plate, and said first and second members are vertically and pairwise aligned to form a first fork and a second fork for supporting the plate. 2. The device according to claim 1 , wherein the opening is arranged in the center of said plate.3. The device according to claim 1 , wherein said opposite first members are arranged colinearly.4. The device according to claim 1 , wherein said opposite second members are arranged colinearly.5. The device according to claim 1 , wherein said direction indicator extends in the elongate direction of said plate and said members are oriented crosswise to said elongate direction and extend along the width of said plate.6. The device according to claim 1 , wherein a first surface of the first member and a second surface of the second member of each fork are configured to allow pivoting of the plate about an axis.7. The device according to claim 6 , wherein at least a part of the first surface and at least a part of the second surface are in the form of at least a part of a lateral area of a cylinder or in the form of at ...

Gradient measuring apparatus and system

A gradient measuring apparatus includes a gimbal assembly operably supported in a construction vehicle for viewing by an operator to see gradient indications in fore-aft and sideways directions. The gimbal assembly includes an outer orb with pointer that moves with the vehicle, and an inner orb with concentric circles that stays in a true vertical by gravitational forces, the combination of which simultaneously accurately reflects a fore-aft and sideways grade at which a ground surface is being cut in an excavating process.

Apparatus and methods for measuring strike and dip, trend and plunge, bearings, and inclination

An apparatus and methodology for measuring strike and dip of a plane, trend and plunge of a line, directional bearing in the horizontal plane, and angle of inclination in the vertical plane. More specifically, the present invention relates to a compass adapted to measure geological features using single compass configurations for each type of measurement. The compass includes a base, a hinge assembly rotatably interconnected to the base, and a lid rotatably interconnected to the hinge assembly. The lid is operable to rotate around both a major axis and a minor axis of the compass. A sight tube is positioned in a hollow bore of the hinge assembly and is operable to sight directional bearings.

Level

A level includes a frame having a top planar surface, a bottom planar surface, and a web coupling the top planar surface to the bottom planar surface. The top planar surface and the bottom planar surface are parallel. The level further includes a vial supported by the frame. The vial has a longitudinal axis passing through a center of the vial and a body defining an interior containing a liquid and an indicator bubble. The level further includes a plurality of LEDs. Each of the LEDs has a light emitting point, and each of the plurality of LEDs is positioned adjacent an end of the vial and is oriented such that the light emitting point is positioned within the interior of the body of the vial. 1. A level comprising:a frame comprising at least one horizontal planar surface; and a vial body defining an interior;', 'a first constituent located within the interior;', 'a second constituent located within the interior, the second constituent movable within the vial body in response to an orientation of the level; and', 'a component reactive to UV light to increase visibility of a portion of the vial assembly., 'a vial assembly supported by the frame, the vial assembly comprising2. The level of claim 1 , further comprising a UV light source supported by the frame and positioned to direct UV light toward the vial assembly claim 1 , wherein the component emits visible light in response to absorption of UV light from the UV light source.3. The level of claim 2 , wherein the UV light source comprises a plurality of UV generating LEDs claim 2 , each of the UV generating LEDs has a light emitting point claim 2 , and each of the plurality of UV generating LEDs is positioned adjacent an end of the vial body and is oriented such that the light emitting point is positioned within the interior of the vial body.4. The level of claim 2 , wherein the vial assembly further includes a pair of end caps with one of the end caps positioned at each end of the vial body.5. The level of claim 4 ...

AUTOMATIC ORIENTATION OF A DISPLAY OF A PORTABLE AIRCRAFT CARGO CONTROL AND MONITOR PANEL

Embodiments includes a system and method for automatic orientation of a display for a portable electronic device (PED) of an aircraft cargo control and monitor panel. The system includes an attitude heading reference system for detecting a first heading information, a master control panel operably coupled to the attitude heading reference system, and a portable electronic device operably coupled to the master control panel. The PED includes a sensor for detecting a second heading information, a display, and a processor operably coupled to the sensor and the display. The processor is configured to receive the first heading information, receive the second heading information, where the first heading information is different than the second heading information, compare the first heading information and the second information, and modify an orientation of a presentation of the display based at least in part on the comparison. 1. A system for automatic orientation of a display for a portable electronic device (PED) of an aircraft , the system comprising:an attitude heading reference system for detecting a first heading information;a master control panel operably coupled to the attitude heading reference system; and a sensor for detecting a second heading information;', a processor operably coupled to the sensor and the display, the processor further configured to:', 'receiving the first heading information;', 'receiving the second heading information, wherein the first heading information is different than the second heading information;', 'comparing the first heading information and the second information; and', 'modifying an orientation of a presentation of the display based at least in part on the comparison., 'a display; and'}], 'a portable electronic device operably coupled to the master control panel, wherein the portable electronic device further comprising2. The system of claim 1 , wherein the sensor is at least one of a magnetometer or a compass type device ...

Level indicator

Method and apparatus for calibrating a magnetic sensor

In general, the invention relates to an algorithm and process for automated and/or continuous calibration of magnetic sensor, for example such as a sensor installed in a mobile positioning system handset. According to certain aspects, the calibration process can use the normal motion of the handset such that all measurement data from the three orthogonal axes of sensor when exposed to Earth's magnetic field is collected. According to still further aspects, the process includes fitting measurement data to an ellipsoid that characterizes the actual magnetic field measurements from a magnetic sensor, so that anomalies such as hard iron effect, soft iron effect and scale factors can be extracted and/or corrected by comparison to a sphere represented by magnetic field data from a model at the sensor's location.

System and method for determining an orientation of a device

A relative bearing sensor for determining an orientation of a device. The relative bearing sensor including a ferromagnetic housing, and wherein the ferromagnetic housing includes a ferromagnetic ball configured to roll with respect to an orientation of the ferromagnetic housing, a magnetic flux sensor, a permanent magnet configured to emit a plurality of magnetic flux lines through the magnetic flux sensor, the plurality of magnetic flux lines steered by a location of the ferromagnetic ball, and a processor programmed. The processor is programmed to determine a flux angle of the plurality of magnetic flux lines, compare the determined flux angle with a predefined flux angle, and determine an orientation of the relative bearing sensor based on the comparing.

Method and apparatus for calibrating a magnetic sensor

In general, the invention relates to an algorithm and process for automated and/or continuous calibration of magnetic sensor, for example such as a sensor installed in a mobile positioning system handset. According to certain aspects, the calibration process can use the normal motion of the handset such that all measurement data from the three orthogonal axes of sensor when exposed to Earth's magnetic field is collected. According to still further aspects, the process includes fitting measurement data to an ellipsoid that characterizes the actual magnetic field measurements from a magnetic sensor, so that anomalies such as hard iron effect, soft iron effect and scale factors can be extracted and/or corrected by comparison to a sphere represented by magnetic field data from a model at the sensor's location.

一种提供稳定地磁场环境的装置和方法

一种提供稳定地磁场环境的装置和方法，三轴磁传感器测量周围环境的三个相互垂直方向上的磁场，磁信号处理模块将三轴磁传感器测量到的磁场信号转换为线性电信号，多路信号合成模块根据多路线性电信号叠加计算外界磁场变化的三个相互垂直的分量，电流放大模块将多路信号合成模块输出的三个磁场变化分量转换为相对应的电流源信号，三维亥姆霍兹线圈根据电流源信号补偿外界变化磁场，以形成稳定的地磁场环境。本发明造价较低，易于实现，利于提高测量精度，不受测试时间场地限制。

CONTROL APPARATUS AND METHOD OF CONTROLLING THE SAME

A control apparatus having an image capturing unit and configured to operate as a master device that controls a slave device, comprises: at least one processor causing the control apparatus to act as: a registration unit configured to register slave device information of a slave device to be controlled by the control apparatus; and an identification unit configured to, based on the slave device information registered by the registration unit, identify a slave device that exists in a range of image capturing by the image capturing unit. The registration unit registers, as the slave device information, information on a relative direction of existence of a slave device with respect to a position of the image capturing unit. 1. A control apparatus having an image capturing unit and configured to operate as a master device that controls a slave device , comprising: a registration unit configured to register slave device information of a slave device to be controlled by the control apparatus; and', 'an identification unit configured to, based on the slave device information registered by the registration unit, identifying a slave device that exists in a range of image capturing by the image capturing unit, wherein, 'at least one processor causing the control apparatus to act asthe registration unit registers, as the slave device information, information on a relative direction of existence of a slave device with respect to a position of the image capturing unit.2. The control apparatus according to claim 1 , the at least one processor further causing the control apparatus to act as:a slave device control unit configured to perform control of a slave device, whereinthe slave device control unit performs control of the slave device that has been identified by the identification unit.3. The control apparatus according to claim 1 , the at least one processor further causing the control apparatus to act as:an output unit configured to output an image captured by the image ...

一种基于双卫星平台的脉冲星角位置测量系统及方法

本发明提供了一种基于双卫星平台的脉冲星角位置测量系统及方法，在外层空间中利用两个共轨运行的卫星同时对一颗脉冲星X射线辐射信号进行观测，利用互相关处理技术，对脉冲星的角位置进行测定，提高了脉冲星角位置的测量精度，从而满足基于X射线脉冲星的高精度自主导航的应用需求。

一种旋转飞行器滚转角解算方法及系统

本发明公开了一种旋转飞行器滚转角解算方法及系统，通过建立绕飞行器质心动力学方程组为驱动方程，以地磁方位角与俯仰角、偏航角、磁偏角、磁倾角和航向角的关系方程为观测方程，以地磁方位角的实际测量值为观测量，通过扩展卡尔曼滤波估计俯仰角和偏航角；然后解算地磁矢量基准角；最后解算出高精度的滚转角；本发明的旋转飞行器滚转角解算方法及系统，提高了滚转角的解算精度。

电子罗盘标定工装

本公开涉及一种电子罗盘标定工装。电子罗盘标定工装包括：底座；Z轴转动件，设置于底座上，可绕Z轴旋转；Z轴角度模块，用于确定Z轴转动件相对底座绕Z轴旋转的角度；X轴固定件，设置于Z轴转动件上；X轴转动件，设置于X轴固定件上，可绕X轴旋转；X轴角度模块，用于确定X轴转动件相对X轴固定件绕X轴旋转的角度；Y轴固定件，设置于X轴转动件上；Y轴转动件，设置于Y轴固定件，可绕Y轴旋转；Y轴角度模块，用于确定Y轴转动件相对Y轴固定件绕Y轴旋转的角度。本公开的电子罗盘标定工装可精准模拟设备的各种姿态，提高标定的精度。

由磁罗盘指示的稳定方向的方法

这是由磁罗盘指示的一种使运动物体在磁场、尤其是在地磁场中能够抵消磁干扰而稳定方向的方法。在第一无干扰测区对一测点测量其磁场矢量的分量，考虑到测量分量随时间的变化情况，需确定磁场强度的绝对值并以其作为函数确定一个品质函数，该品质函数是测得的磁场矢量分量随时间分布的一个度量和磁场强度值品质的度量。对其他测点，利用该品质函数和已测得的分量值估算在该测点的磁场矢量以及测量这些磁场矢量的空间分量。通过测量再确定另一条品质函数，它与第一条品质函数组合成一条权重函数，用权重函数权重新的磁场矢量分量，以获得具有稳定分量的稳定磁场矢量。该方法可以通过迭代法进行。

Stabilised gyrocompass system

FIELD: physics. SUBSTANCE: stabilised gyrocompass system contains a vertical angular velocity sensor, a coordinate converter, and a yaw rate sensor consisting of the first integrator, the adjustable link and the second integrator, a closed loop of the stabilised gyrocompass system with the first pitching angles located at the output of the second integrator. The second output of the Earth rotational speed projection signal is inserted into the circuit of the stabilised gyrocompass system located between the adjustable link and the second integrator. A new closed loop of the derived calculation from the Earth's rotation speed projections is inserted into the stabilised gyrocompass system, and consists of the series-connected adders, an azimuth unit, a unit of filters and derivatives. The second circuit output of the stabilised gyrocompass system through the adder is connected with a new circuit of the derived calculation from the Earth's rotation speed projections. The filter parameters in the new circuit are set so that the useful output signal of the adder is independent from them. The unit of the derivatives is connected to the vertical angular velocity sensor, the azimuth unit output is an azimuth output of the stabilised gyrocompass system and is connected to the input of the coordinate converter. Two other input converters are connected to the first output circuit of the stabilised gyrocompass system and the course angle sensor, the output of the coordinate converter is the output of the stabilised gyrocompass system by course. EFFECT: improved accuracy of the instrument azimuth generation and the object course, excluding the amplitude and phase distortion inserted by the filters. 1 dwg, 3 tbl РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 610 022 C1 (51) МПК G01C 19/38 (2006.01) G01C 17/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ФОРМУЛА (21)(22) Заявка: ИЗОБРЕТЕНИЯ К ПАТЕНТУ РОССИЙСКОЙ ФЕДЕРАЦИИ 2015142322, 05.10.2015 (24) Дата ...

Object angle sensor

FIELD: measuring equipment. SUBSTANCE: object angle sensor, a sensing element of which is in the form of a ball with a displaced center of mass provided with a permanent magnet, located in a housing of hemispheres consisting of nonmagnetic electrically conductive isolated sectors and held concentrically to the sphere by a hydrostatic suspension due to surface tension forces of the liquid, filling the spherical gap, and zero buoyancy, providing measurement of the angles of the object along the three axes simultaneously due to the mismatch of the capacitive signals resistance and frequency between sectors housing of the hemispheres. The ball's hemispheres are made of a dielectric and are provided with oppositely arranged electrically conductive nonmagnetic galvanically connected or disconnected with each other screens of up to 1/4 sphere size. EFFECT: increase the stability and accuracy of measuring the angles of the object. 4 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 627 991 C1 (51) МПК G01C 9/36 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2016131156, 27.07.2016 (24) Дата начала отсчета срока действия патента: 27.07.2016 Дата регистрации: Приоритет(ы): (22) Дата подачи заявки: 27.07.2016 (45) Опубликовано: 14.08.2017 Бюл. № 23 C 1 R U Стр.: 1 1053179 A1, 07.11.1983. RU 2191988 C2, 27.10.2002. US 6472864 B1, 29.10.2002. поверхностного натяжения жидкости, заполняющей сферический зазор, и нулевой плавучести, обеспечивающего измерение углов наклона объекта по трем осям одновременно за счет рассогласования сигналов емкостного сопротивления и частоты между секторами полусфер корпуса, при этом полусферы шара выполнены из диэлектрика и снабжены оппозитно расположенными электропроводящими немагнитными гальванически соединенными или разъединенными между собой экранами размером до 1/4 сферы. Технический результат – повышение стабильности и точности измерений углов наклона объекта. 4 ил. C 1 (54) ...

一种基于静态力矩模式陀螺全站仪的逐次多位置寻北测量方法

本发明公开了一种基于静态力矩模式陀螺全站仪的逐次多位置寻北测量方法，包括如下步骤：一、安置仪器；二、陀螺定向测量：a.使陀螺马达旋转轴方向对准陀螺仪测角装置中的电子度盘零刻度线方向；第一位置寻北测量；c.计算得到电子度盘零刻度线方向偏离真北方向夹角∠NOR并向真北方向旋转角度∠NOR到达第二位置；重复执行步骤b、c，依次到达第三位置、……、第m位置，直至两次对应的夹角∠NOR差值小于阈值；得到电子度盘零刻度线方向偏离真北方向夹角∠NOR；三、照准系统方向观测；四、计算测线的真北方位角。本发明解决了架设区间小、需要人工调节、寻北时间长、数据稳定性差、效率低等问题，增强了仪器的环境适应性。

Method for calibrating electronic magnetic compass

FIELD: physics. SUBSTANCE: method for calibrating an electronic magnetic compass comprises the stages, at which the compass is mounted on the plane so that the magnetic field receivers of its orthogonal axes 0X and 0Y lie in this plane, the compass is rotated around the axis 0Z perpendicular to this plane, and is fixed into four, i=1÷4, orthogonal positions, the signals of the magnetic field receivers M xi and M yi are measured in each compass position by the axes 0X and 0Y, the static compass errors m x and m y are evaluated for each of the compass axes by determining the average values of the signals M xi and M yi in all the compass positions: ; the k-ratio of the compass receiver sensitivities is determined by the axes 0X and 0Y, the axis 0X is combined with the movement direction when using the compass, the signals of the magnetic field receivers B x and B y are measured by the axes 0X and 0Y, and the true direction to the manetic pole in the plane X0Y is calculated by the formula: α=arctg[(B y -m y )/(k(B x -m x )], wherein the k-ratio of the compass receiver sensitivities is calculated by the axes 0X and 0Y as the ratio of the magnetic field vector modules obtained by using all the measurements on the axis Y and the axis X: . EFFECT: increasing the accuracy of calibrating the magnetic compass. 6 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 623 192 C1 (51) МПК G01C 17/38 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ФОРМУЛА (21)(22) Заявка: ИЗОБРЕТЕНИЯ К ПАТЕНТУ РОССИЙСКОЙ ФЕДЕРАЦИИ 2016104007, 08.02.2016 (24) Дата начала отсчета срока действия патента: 08.02.2016 Дата регистрации: (72) Автор(ы): Каплин Александр Юрьевич (RU), Степанов Михаил Георгиевич (RU), Ярмолич Алексей Григорьевич (RU) Приоритет(ы): (22) Дата подачи заявки: 08.02.2016 R U (73) Патентообладатель(и): Открытое акционерное общество "РАДИОАВИОНИКА" (RU) 22.06.2017 (56) Список документов, цитированных в отчете о поиске: RU 2572109 C1, 27.12.2015. RU (45) Опубликовано: 22. ...

Orientation data generation method, azimuth sensor unit and portable electron device

输入来自地磁传感器的数据，并基于输入的数据测量磁场数据，所述地磁传感器在三个轴向上检测磁场。连续存储测量的磁场数据，并判断如此存储的多个磁场数据是否位于三维方位空间的同一平面内。当判断出多个磁场数据位于三维方位空间的同一平面内时，基于磁场数据并依照预定算法来计算存储的磁场数据所位于的圆弧的中心坐标，并将其作为临时偏移值。在计算出临时偏移值后，用该临时偏移值校正测量的磁场数据，并基于该校正的磁场数据执行算术运算来确定方位数据。

Apparatus for measuring strike and dip

The present invention relates to a learning strike and inclination measuring device for adjusting the inclination angle of the inclined plane arbitrarily and to easily measure the direction of inclination of the inclined plane in a horizontal state using a horizontal system.

Optical tracking device

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Direct vector cross-cut method

FIELD: measurement. SUBSTANCE: invention relates to measurement equipment and can be used in geodesy for solving problems of determination of value and rate of daily motion of separate structural elements of buildings, structures and object as a whole. When performing geodetic control of the object on the ground, two goniometer devices (theodolite, tachometer) are installed inside the network of reference points outside the centres of points at points which provide the most favourable conditions for determining increments of coordinates of the monitored points. Coordinate axes are oriented by means of a method for determining the angle of turning of the goniometer. Values of movements of controlled points are calculated directly by increments of measured values without calculation of coordinates of object controlled points. EFFECT: technical result is simplification of technical implementation by determining values of movements of monitored points directly on increments of measured values, without calculating coordinates of monitored points of object. 1 cl, 2 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 735 311 C1 (51) МПК G01C 1/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК G01C 1/00 (2020.02) (21)(22) Заявка: 2020104072, 29.01.2020 (24) Дата начала отсчета срока действия патента: Дата регистрации: 29.10.2020 (45) Опубликовано: 29.10.2020 Бюл. № 31 2 7 3 5 3 1 1 R U (54) Способ прямой векторной засечки (57) Реферат: Изобретение относится к измерительной технике и может быть использовано в геодезии для решения задач по определению величины и скорости протекания суточных перемещений отдельных конструктивных элементов зданий, сооружений и объекта в целом. При выполнении геодезического контроля объекта на местности внутри сети ориентирных пунктов устанавливают два угломерных прибора (теодолит, тахометр) вне центров пунктов в точках, обеспечивающих выгоднейшие условия определения приращений координат ...

A kind of calibrated scale and measurement method measuring different ramp slope angles

本发明涉及一种测量不同斜坡坡度角的测度尺及测量方法，测度尺包括箱体、滑轮、铁球、电源箱、计时箱，滑轮的顶端与箱体的顶板相连，箱体的底板为磁铁式导电片，滑轮上缠绕了导电绳，导电绳的一端固定在铁球上，另一端通过外部导线连接与电源箱的内部电路的一端相连接，电源箱的内部电路的另一端通过外部导线与底板相连接，铁球与底板相接触时，电源箱的内部电路连通，使计时箱的内部电路断开，箱体的顶部位置设置有可抽式垫条，固定铁球，滑轮上设有手摇柄，手摇柄伸出箱体。本发明的测度尺因结构简单，操作简洁快捷，易推广，可用于高频率测量场合，使边坡施工过程中时刻处于受控状态，从而保证工程质量。

Offset calculation circuit and azimuth angle sensor using the same

Electronic compass and device with the same

本发明涉及一种电子罗盘及带有该电子罗盘的设备。所述电子罗盘包括：磁场传感器；增益调整模块，用于调整磁场传感器的增益，以使所述磁场传感器获取的地磁场检测值均落入所述磁场传感器的量程内；检测值获取模块，用于使所述电子罗盘在其所处位置的至少一个预设坐标平面内或平行于所述预设坐标平面的第一平面内沿着垂直于所述预设坐标平面的第一轴自转，并获取一组与所述坐标平面对应的地磁场检测值；校准数据获取模块，用于根据获取的地磁场检测值计算与所述坐标平面对应的校准数据并存储，所述校准数据包括沿每个坐标轴方向的地磁场偏移值；校准模块，用于根据所述校准数据校准所述电子罗盘。本发明提高了电子罗盘校准的准确性。

Acceleration measuring device having rotation structure

The present invention relates to an acceleration measuring device provided with a rotation structure and includes: a weight rotation structure (100) having a sensor mounting unit (120) which maintains a surface perpendicular to a vertical direction by a weight (110) and an acceleration measuring unit (A) having an acceleration sensor mounted on the sensor mounting unit (120); a rotating ring (200) having the weight rotation structure (100) which is rotatable therein; and a rotating ring support part (300) provided with the rotating ring (200) which is rotatable therein.

Device for measuring slope

[목적] 구조가 간단하고 측정작업이 신속 간편하며, 또한 측정정밀도와 정확성을 기할 수 있는 구조물의 기울기 측정기를 제공하기 위한 것이다. [Purpose] To provide a structure tilt sensor that is simple in structure, quick and easy to measure, and has high measurement accuracy and accuracy. [구성] 오목하게 들어간 본체(1)의 앞면에서 중앙 상부에 고정축(2)을 설치하여 지시침(4)이 부착된 중량추(3)를 제자리에서 선회가능하게 설치하고, 상기 지시침(4)의 회전반경내에 호상 눈금판(5)을 부착한 것이다. [Configuration] The fixed shaft 2 is installed at the center in the front of the concave main body 1 so that the weight 3 with the indicator needle 4 is pivotably installed in place, and the indicator needle ( The arc scale plate 5 is attached within the radius of rotation of 4).

Arm ring attitude angle calculation method based on complementary Kalman filter

本发明主要公开了一种基于互补卡尔曼滤波器的臂环姿态角计算方法，其技术方案：包括以下步骤：步骤1：搭建姿态角测量系统，系统上电启动，陀螺仪、加速度计、磁传感器开始读取数据；步骤2：开始时，手臂平放处于静止水平状态，载体系xyz三轴分别指向水平右前上，采集一段时间序列N长度的传感器数据，计算状态X初始值X0；步骤3：系统噪声阵、量测噪声矩阵初始化；步骤4：状态量X的预测更新；步骤5：量测Z更新；步骤6：滤波增益K计算；步骤7：状态X估计；步骤8：运动结束，反之若运动未结束，则循环执行步骤4～步骤7；对加速度计、陀螺仪、磁传感器测量的角度进行融合，并得到一种更加精确的臂环姿态角计算结果。

Method for constructing absolute angle transducer

FIELD: measuring equipment. SUBSTANCE: in the method of constructing an absolute angle transducer, a disc data storage, mounted on a precision axis, is used. Three concentric encoding tracks with the number of strokes equal to N, N-1 and N-k, forming systems of rough and accurate angle readings. The beginning of the absolute type converter scale is defined and phase modulation of the radiation striking upon the diffraction grid is used. The necessary diffraction orders are selected and brought to interference by means of three interferometers. As a result, three phases of interference signals from three interferometers are allocated at their outputs and form the output value of the angle with high resolution. EFFECT: possibility of increasing the resolution power of the absolute angle transducer from the full revolution of the transducer rotor with significantly smaller dimensions. 2 cl, 4 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 634 329 C1 (51) МПК G01C 1/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2016119141, 17.05.2016 (24) Дата начала отсчета срока действия патента: 17.05.2016 Дата регистрации: Приоритет(ы): (22) Дата подачи заявки: 17.05.2016 (45) Опубликовано: 25.10.2017 Бюл. № 30 (56) Список документов, цитированных в отчете о поиске: SU 1197081 A, 07.12.1985. RU 2 6 3 4 3 2 9 R U (54) Способ построения углового преобразователя абсолютного типа (57) Реферат: Изобретение относится к области используется фазовая модуляция падающего на оптоэлектроники и может быть использовано в дифракционную решетку излучения. Выделяются измерительной технике, в точном нужные порядки дифракции, которые приводятся машиностроении, приборостроении и других к интерференции с помощью трех областях науки и промышленности для создания интерферометров. В результате на их выходах высокоточных систем управления и выделяются три фазы интерференционных углоизмерительных приборов. В заявленном сигналов трех ...

Level

According to the present invention, a level member is provided. The level member comprises: a level member main body; one or more transparent tubes installed in the level member main body and containing bubbles and a liquid; a non-conductive plate which is installed in the level main body and has a first to a fourth pair of electrodes on the inner circumferential surface of an internal space penetrating the non-conductive plate; a conductive disk capable of electrically connecting one pair among the first to the fourth pair of electrodes along a rolling position on the inner circumferential surface of the internal space; and one or more laser oscillation devices installed in the level member main body to irradiate laser light when one pair of electrodes among the first pair to the fourth pair of electrodes are electrically connected.

A kind of direction measurement method of satellite high-precision optical sensitive load

本发明提供了一种卫星高精度光学敏感载荷的指向测量方法，首先利用测角系统对不同温度载荷下敏感载荷棱镜的两个正交方向矢量的俯仰角和偏摆角进行测量，再通过数学表达式描述出棱镜单位矢量在敏感载荷局部坐标系的表示，进而推算出棱镜单位矢量在卫星本体坐标系下的表示，最终根据热变形欧拉角定义解算敏感载荷指向变化情况。它主要解决了卫星光学敏感载荷因热变形引发角秒级角度变化的高精度指向测量需求。