System, device, and method for detecting perturbations

THERMAL COMPENSATION FOR BURST-MODE LASER WAVELENGTH DRIFT

An apparatus comprising a burst-mode laser(610) comprising an active layer(720) and configured to emit an optical signal during a burst period, wherein a temperature change of the burst-mode laser(610) causes the optical signal to shift in wavelength, and a heater(620) thermally coupled to the active layer(720) and configured to reduce a wavelength shift of the optical signal during the burst period by applying heat to the active layer(720) based on timing of the burst period.

Adaptive heat dissipation

An adaptive heat dissipation apparatus is provided, including two or more chamber walls forming a chamber volume having a first open side and a second open side, a heat source positioned at the first open side of the chamber volume, a heat conducting surface positioned at the second open side of the chamber volume, and a thermally-expansive material occupying a predetermined portion of the chamber volume. The thermally-expansive material expands to substantially fill the chamber volume at an ambient temperature above a predetermined temperature threshold and conducts heat from the heat source to the heat conducting surface. The thermally-expansive material contracts to leave an air gap when the ambient temperature is below the predetermined temperature threshold.

THERMAL COMPENSATION FOR BURST-MODE LASER WAVELENGTH DRIFT

An apparatus comprising a burst-mode laser(610) comprising an active layer(720) and configured to emit an optical signal during a burst period, wherein a temperature change of the burst-mode laser(610) causes the optical signal to shift in wavelength, and a heater(620) thermally coupled to the active layer(720) and configured to reduce a wavelength shift of the optical signal during the burst period by applying heat to the active layer(720) based on timing of the burst period.

Laser anti-counterfeiting paper and manufacturing method thereof

The invention relates to laser anti-counterfeiting paper and a manufacturing method thereof. The anti-counterfeiting paper comprises a paper body and is characterized in that a plurality of laser holographic film segments are doped in the paper body. The manufacturing method comprises the following steps of: 1) making a plate; 2) preparing a laser holographic film by means of mould pressing; 3) grinding the laser holographic film into segments; 4) doping the segments of the laser holographic film into pulp and uniformly stirring; and 5) making paper. The laser anti-counterfeiting paper has the advantage of good anti-counterfeiting performance. The manufacturing method has the advantages of simple process and easy operation. By combining the laser anti-counterfeiting technology and the papermaking technology, a plurality of segments of the laser holographic film are doped into the anti-counterfeiting paper, and each segment contains anti-counterfeiting information, so the anti-counterfeiting ...

System, device, and method for detecting perturbations

RFID anti-counterfeiting printing antenna and preparation method thereof

The invention belongs to the field of a printing antenna, and particularly relates to an RFID anti-counterfeiting printing antenna and a preparation method thereof. Slurry is formed by mixing Datatrace DNA and conducting silver slurry in a mass ratio of (1-2): 5. Besides the characteristics of an ordinary printing antenna such as conductivity, low cost and environmental protection, an anti-counterfeiting effect of the antenna is realized by adopting the Datatrace DNA, the writing of the anti-counterfeiting element is completed by a manufacturer of the printing antenna, a way is provided for the manufacturer of the printing antenna to protect the product, and a novel solution is provided for identifying the printing antenna. The invention also provides a preparation method of the RFID anti-counterfeiting printing antenna. The produced antenna is stable in performance, high in rate of finished products, good in conductivity and relatively stable in technological parameters.

APPARATUS AND METHOD FOR ON-LINE, REAL-TIME ANALYSIS OF CHEMICAL GASES DISSOLVED IN TRANSFORMER OIL

An inspection probe for directly measuring a transmission spectrum of a solvent oil in a transformer includes a tube having a plurality of apertures spaced along a side of the tube to allow oil to pass therethrough, and first and second optical collimators disposed at opposing ends of the tube. The first and second collimators are aligned by the tube such that incident light is transmitted through the first collimator, the tube, and the second collimator to a spectrometer

SYSTEM, DEVICE, AND METHOD FOR DETECTING PERTURBATIONS

Taping marking testing device

The invention particularly relates to a semiautomatic taping marking testing device. The device is characterized by comprising a worktable, wherein two rotating discs are arranged on the table top of the worktable; motors which are respectively connected with the two rotating discs are arranged below the table top; and a switch panel which is used for controlling the two motors and an infrared diffuse reflection counter are arranged on the table top between the two rotating discs. According to the taping marking testing device, the problems of great labor intensity, poor testing effect and low work efficiency of manual taping mark testing in the prior art and has the advantages of reasonable structure, simple operation, convenient use and high working efficiency.

Thermal compensation for burst-mode laser wavelength drift

An apparatus comprising a burst-mode laser(610) comprising an active layer(720) and configured to emit an optical signal during a burst period, wherein a temperature change of the burst-mode laser(610) causes the optical signal to shift in wavelength, and a heater(620) thermally coupled to the active layer(720) and configured to reduce a wavelength shift of the optical signal during the burst period by applying heat to the active layer(720) based on timing of the burst period.

Thermal compensation for burst-mode laser wavelength drift

An apparatus comprising a burst-mode laser(610) comprising an active layer(720) and configured to emit an optical signal during a burst period, wherein a temperature change of the burst-mode laser(610) causes the optical signal to shift in wavelength, and a heater(620) thermally coupled to the active layer(720) and configured to reduce a wavelength shift of the optical signal during the burst period by applying heat to the active layer(720) based on timing of the burst period.

Constructional engineering management measuring tool

The utility model relates to the technical field of constructional engineering, in particular to a constructional engineering management measuring tool which comprises a bottom plate, a first baffle, a second baffle, a top plate, a first placing frame, a second placing frame, a third placing frame, a fixing shaft, a first fixing rod, a second fixing rod, a circular shaft, a first gear and a transverse plate. A rotating shaft is arranged on the inner top wall of the second containing frame, a second gear sleeves the circumferential outer wall of the rotating shaft, a connecting rod is fixedly arranged at the rear end of the sliding strip, a first supporting rod and a second supporting rod are arranged on the inner bottom wall of the third containing frame, and the right end of the first supporting rod is connected with the left end of the second supporting rod through a bolt. The transparent baffle is arranged at the top end of the bottom plate in a circular ring shape, the side vertical ...

Active MEMS damping

Methods and apparatus for reducing the oscillation of a MEMS actuator. In one embodiment, a driving signal is generated to adjust the MEMS actuator through a set of driving wires coupled to the MEMS actuator. A motion-induced signal from the set of driving wires coupled to the MEMS actuator is received in response to the driving signal. The motion-induced signal is filtered to generate a filtered motion-induced signal. The filtered motion-induced signal is amplified to generate an amplified filtered motion-induced signal. The driving signal is adjusted based on the amplified filtered motion-induced signal to reduce the oscillation of the MEMS actuator.

Laser projection display apparatus and implementing method

The invention provides a laser projection display device and an implement method, wherein the display device comprises the following components: an image signal processing unit, which is used for receiving and processing an input image signal and outputting the brightness of three primary colors in the image signal, and line synchronization voltage and field synchronization voltage corresponding to image display; a light source unit, which controls the output of three-color laser of which the intensity is directly proportional to the brightness of the three primary colors in the image signal; and a light beam scanning unit, which makes a three-color laser beam emitted by the light source unit perform scanning motions in the horizontal direction and the vertical direction, wherein the moving speed is synchronous with a horizontal synchronizing signal and a vertical synchronizing signal provided by the light source unit so that the three-color laser beam scanning in the horizontal direction ...

Oil ink with irreversible temperature change

The invention belongs to the field of temperature-changed oil ink, in particular to oil ink with irreversible temperature change. The oil ink with irreversible temperature change is characterized by comprising 49.3 percent of resin solution of color former, 49.3 percent of resin solution of color developing agent, 0.4 percent of 6800 defoaming agent and 1.0 percent of flatting agent JH-5010. The oil ink with irreversible temperature change overcomes the defect that the temperature-changed oil ink in the prior art cannot prevent secondary transfer and has the advantages of low cost, stable performance and irreversible temperature change. A mark printed by using the oil ink is perfectly combined with an original anti-fake element to achieve the aesthetic effect of an anti-fake mark and the anti-fake effect of preventing the secondary transfer. When the anti-fake mark is heated to uncover the anti-fake mark, the color of the anti-fake mark is changed and irreversible at the same time, so the ...

High-speed demodulation method and device for high-capacity weak grating sensing network

The invention discloses a high-speed demodulation method for a high-capacity weak grating sensing network. The method comprises the following steps: (1) inscribing a plurality of weak gratings FBGr, FBG1, FBG2, FBG3 and the like in sequence on an optical fiber, wherein the FBGr is taken as a reference grating, and the FBG1, FBG2, FBG3 and the like are divided into m (m is more than or equal to 1) groups of identical weak grating arrays for constructing a sensing network; (2) generating pulse light by using a pulse laser, introducing the pulse light into the reference grating and the sensing network through an optical circulator, returning the reflected signal of each weak grating to the optical circulator, and introducing the reflected signals into an erbium-doped optical fiber amplifier for amplifying; (3) feeding the amplified reflected signals into a dispersion compensation optical fiber, receiving the time of the reflected signal of each weak grating by using a photoelectric detector ...

Energy recycling device, using method thereof and excavator

The invention discloses an energy recycling device, a using method of the energy recycling device and an excavator. A movable space is arranged in a balance weight shell, a movable block and other components are installed in the movable space, a spring is arranged in a groove in the top of the movable block, a piston rod of an oil cylinder is connected with the bottom of the movable block, and an axial hole of the root portion of the oil cylinder is formed in the balance weight shell. A second oil cylinder is installed in the position below the center of gravity of the movable block, and an oil path of the first oil cylinder and an oil path of a third oil cylinder are connected with a first two-position three-way valve. A second two-position three-way valve is connected with a hydraulic main system pipeline, and a third two-position three-way valve is connected with an oil tank. According to the energy recycling device, the using method of the energy recycling device and the excavator, ...

Substitutive treatment agent for metal surface phosphating and preparation method thereof

The invention discloses a substitutive treatment agent for metal surface phosphating and a preparation method thereof, and relates to the metal surface treatment technology. The substitutive treatment agent for phosphating consists of the following components of: gamma-APS, anhydrous alcohol, fluozirconate and de-ionized water, wherein the substitutive treatment agent for phosphating consisting of the components is a silane and nanoceramic composite film; the preparation method for the silane and nanoceramic composite film which consists of the components and is used for pre-treating the metal surface comprises the following steps of: rinsing with hot water; degreasing in advance; rinsing for the first time; rinsing for the second time; rinsing for the third time; performing phosphate-free conversion; rinsing a straight bar; rinsing for the fourth time; rinsing for the fifth time; and finishing the preparation. The substitutive treatment agent and the preparation method have the advantages ...

Method for testing original viscosity of adhesive by adopting vertical tension method

The invention relates to a method for testing the original viscosity of an adhesive by adopting a vertical tension method, belonging to the field of viscosity tests of adhesives and comprising a tension tester. The method is technically characterized by comprising the following steps: firstly, a clean steel ball is vertically hung on the tension tester through a stayguy; secondly, an adhesive tape is flatly adhered to a carrying platform arranged below the clean steel ball; and thirdly, the tension tester is started to enable the clean steel ball to descend with uniform speed of 250 to 350 mm/min until the clean steel ball is in a stationary state on the surface of the adhesive tape, and then the clean steel ball is fast lifted upwards with speed of 250 to 350 mm/min through the tension tester until the clean steel ball leaves the adhesive tape, and the tension tested by the tension tester is the original viscosity of the adhesive. After improving the prior art, the invention has the advantages ...

Carrier density-based tunable filter

An optical filter comprising a first distributed Bragg reflector (DBR) layer, a second DBR layer, and an intrinsic semiconductor layer positioned between the first DBR layer and the second DBR layer, with the intrinsic semiconductor layer providing a passband wavelength for the optical filter based on a carrier density of the intrinsic semiconductor layer.

APPARATUS AND METHOD FOR REORGANIZING RESOURCES OF OPTICAL FIBER CABINET AND OPTICAL FIBER CABINET

The present invention provides an apparatus including: a macrobending injected-light modulation and control module, configured to modulate an injected optical signal according to a port identifier of each first port and inject the injected optical signal to an optical fiber connected to the first port; a macrobending signal detection module, configured to receive a received optical signal at a second port of an optical transmission path; a phase-locked detection module, electrically connected to the macrobending injected-light modulation and control module and the macrobending signal detection module, and configured to: when an injected optical signal that is injected by the macrobending injected-light modulation and control module to an optical fiber is consistent with a received optical signal that is acquired by the macrobending signal detection module, acquire and output port identifiers of a first port and a second port. 1. An apparatus for reorganizing resources of an optical fiber cabinet and configured to search for ports located at two ends of a same optical transmission path , wherein the optical fiber cabinet comprises at least two optical transmission paths , each optical transmission path is provided with a first port and a second port , and the apparatus for reorganizing resources of an optical fiber cabinet comprises:a macrobending injected-light modulation and control module, configured to modulate an injected optical signal according to a port identifier of each first port, and inject the injected optical signal to an optical fiber connected to the first port;a macrobending signal detection module, configured to receive a received optical signal at a second port of an optical transmission path;a phase-locked detection module, electrically connected to the macrobending injected-light modulation and control module and the macrobending signal detection module, and configured to: when an injected optical signal that is injected by the macrobending ...

Thermal compensation for burst-mode laser wavelength drift

An apparatus comprising a burst-mode laser comprising an active layer and configured to emit an optical signal during a burst period, wherein a temperature change of the burst-mode laser causes the optical signal to shift in wavelength, and a heater thermally coupled to the active layer and configured to reduce a wavelength shift of the optical signal during the burst period by applying heat to the active layer based on timing of the burst period.

Active MEMS Damping

Methods and apparatus for reducing the oscillation of a MEMS actuator. In one embodiment, a driving signal is generated to adjust the MEMS actuator through a set of driving wires coupled to the MEMS actuator. A motion-induced signal from the set of driving wires coupled to the MEMS actuator is received in response to the driving signal. The motion-induced signal is filtered to generate a filtered motion-induced signal. The filtered motion-induced signal is amplified to generate an amplified filtered motion-induced signal. The driving signal is adjusted based on the amplified filtered motion-induced signal to reduce the oscillation of the MEMS actuator. 1. A method for reducing an oscillation of a microelectromechanical systems (MEMS) actuator , the method comprising:generating, by a driver unit, a driving signal to adjust the MEMS actuator through a set of driving wires coupled to the MEMS actuator;receiving, by an amplifier with a bandpass filter, a motion-induced signal from the set of driving wires coupled to the MEMS actuator in response to the driving signal;filtering, by the bandpass filter, the motion-induced signal to generate a filtered motion-induced signal;amplifying, by the amplifier, the filtered motion-induced signal to generate an amplified filtered motion-induced signal; andadjusting, by the driver unit, the driving signal based on the amplified filtered motion-induced signal to reduce the oscillation of the MEMS actuator.4. The method of claim 1 , wherein the motion-induced signal is amplified between 5× and 50×.5. The method of claim 1 , wherein filtering the motion-induced signal removes a direct current component from the motion-induced signal.6. The method of claim 1 , wherein the oscillation of the MEMS actuator is caused in part by external vibration shock to the MEMS actuator.7. A microelectromechanical systems (MEMS) optical switch comprising:a driver unit configured to generate a driving signal to adjust a MEMS actuator through a set of ...

Apparatus and method for on-line, real-time analysis of chemical gases dissolved in transformer oil

An inspection probe for directly measuring a transmission spectrum of a solvent oil in a transformer includes a tube having a plurality of apertures spaced along a side of the tube to allow oil to pass therethrough, and first and second optical collimators disposed at opposing ends of the tube. The first and second collimators are aligned by the tube such that incident light is transmitted through the first collimator, the tube, and the second collimator to a spectrometer.

Apparatus and Method for Recognizing Optical Splitter Port, and Method and Apparatus for Detecting Temperature of Optical Splitter

The present invention provides an optical splitter and a system, including: an optical divider, a ribbon fiber, and tributary fibers, where the optical divider is configured to divide an input optical signal into at least two optical signals for output; one end of the ribbon fiber is connected to the optical divider, and the other end of the ribbon fiber is connected to the tributary fibers, where a grating array is disposed on the ribbon fiber; and the grating array includes at least two Bragg gratings, different Bragg gratings correspond to different tributary lines of the optical divider, and the number of Bragg gratings included in the grating array is the same as the number of optical signals output by the optical divider; which solves a problem that additional connection loss is increased because an existing splitter needs to be connected to each link fiber by using an optical connector. 1. An optical splitter , comprising:an optical divider, wherein the optical divider is configured to divide an input optical signal into at least two optical signals for output;tributary fibers;a ribbon fiber, wherein one end of the ribbon fiber is connected to the optical divider and the other end of the ribbon fiber is connected to the tributary fibers; anda grating array disposed on the ribbon fiber, wherein the grating array is configured to separately perform filtering processing on each optical signal output by the optical divider and reflect optical signals of corresponding wavelengths, and wherein the grating array includes at least two Bragg gratings, different Bragg gratings correspond to different tributary lines of the optical divider, and a number of Bragg gratings included in the grating array is the same as a number of optical signals output by the optical divider.2. The optical splitter according to claim 1 , further comprising a metal packaging box claim 1 , wherein the grating array is packaged in the metal packaging box.3. The optical splitter according to ...

Method for synthesizing high-purity arsine

The invention relates to a method for synthesizing high-purity arsine, which belongs to the technical field of electron gas synthesization and purification. The method includes the following steps: (1) crude arsine synthesization process: first producing arsenic powder and zinc powder into zinc arsenide, which then reacts with dilute sulphuric acid to produce crude arsine; and (2) high-purity arsine purification process: carrying out liquid nitrogen cold trap low-temperature vacuum separation, molecular sieve adsorption and drying and gallium-indium alloy deep absorption for dehydration and deoxidation on the crude arsine. The method can deeply remove oxygen, water, carbon dioxide and other harmful impurities in electronic material, which normally can reach less than 0.01 to 0.1ppm; and gallium-indium alloy as the main body of purifying agent can be reused, and theoretically has a long service life except slight loss in chemical treatment.

Thermal compensation for burst-mode laser wavelength drift

An apparatus comprising a laser comprising an active layer and configured to emit an optical signal, wherein a temperature change of the laser causes the optical signal to shift in wavelength, and a heater thermally coupled to the active layer and configured to reduce a wavelength shift of the optical signal by applying heat to the active layer.

Apparatus and method for reorganizing resources of optical fiber cabinet and optical fiber cabinet

The present invention provides an apparatus including: a macrobending injected-light modulation and control module, configured to modulate an injected optical signal according to a port identifier of each first port and inject the injected optical signal to an optical fiber connected to the first port; a macrobending signal detection module, configured to receive a received optical signal at a second port of an optical transmission path; a phase-locked detection module, electrically connected to the macrobending injected-light modulation and control module and the macrobending signal detection module, and configured to: when an injected optical signal that is injected by the macrobending injected-light modulation and control module to an optical fiber is consistent with a received optical signal that is acquired by the macrobending signal detection module, acquire and output port identifiers of a first port and a second port.

System, device, and method for detecting perturbations via a fiber optic sensor

Certain exemplary embodiments comprise a spatially distributed multimode optical fiber; a photodetector configured to detect optical signals provided from said fiber; a wireless digital module coupled to said photodetector and adapted to wirelessly transmit a wireless signal encoding a plurality of detected variables of the optical signals; a wireless receiver adapted to receive the wireless signal; and a signal processing module coupled to said wireless receiver and adapted to decode and interpret the plurality of detected variables of the optical signals.

Turbocharger

The invention discloses a turbocharger which adopts the scheme that a plurality of blades are arranged on the surface of a gas compressor wheel of the turbocharger; all the blades extend in the tangential direction of the gas compressor wheel, and are divided into a plurality of groups; each group of blades comprises three blades forming the compression gradient and sequentially arranged, and the lengths and heights of the three blades sequentially and gradually decrease; a pressure expander is arranged on the outer side of the wheel edge of the gas compressor wheel in a sleeving manner; the pressure expander comprises a first wheel disc and a second wheel disc which are oppositely buckled together; first pressure expansion cavities are formed in the end face of the first wheel disc; second pressure expansion cavities are formed in the end face of the second wheel disc; each first pressure expansion cavity and the corresponding second pressure expansion cavity are correspondingly buckled ...

Thermal compensation for burst-mode laser wavelength drift

An apparatus comprising a burst-mode laser comprising an active layer and configured to emit an optical signal during a burst period, wherein a temperature change of the burst-mode laser causes the optical signal to shift in wavelength, and a heater thermally coupled to the active layer and configured to reduce a wavelength shift of the optical signal during the burst period by applying heat to the active layer based on timing of the burst period.

OPTICAL CROSS CONNECTS INCLUDING MIRROR MONITORING

Optical cross connects and methods for use therewith are described herein. In an embodiment, an optical cross connect includes first and second mirror arrays, first and second light sources that respectively emit first and second color coded light beams (e.g., each of which includes red, green and blue light), and first and second cameras configured to respectively capture first and second color images of the first and second color coded light beams reflected respectively from the first and second mirror arrays. The optical cross connect also includes a controller configured to perform closed loop feedback control of the first and second mirror arrays, based on the first and second color images, when the controller controls how optical signals are transferred between individual optical fibers in a first bundle of optical fibers and individual optical fibers in a second bundle of optical fibers. 1. An optical cross connect , comprising:a first collimator array including a plurality of first collimators, and a second collimator array including a plurality of second collimators;a first mirror array including a plurality of first mirrors, and a second mirror array including a plurality of second mirrors;each first mirror of the first mirror array configured to reflect a light beam, directed towards the first mirror by a respective one of the first collimators, towards a selected one of the second mirrors of the second mirror array;each second mirror of the second mirror array configured to reflect a light beam, directed towards the second mirror by the first mirror array, towards a respective one of the second collimators;a light source configured to emit a color coded light beam towards the first mirror array;a camera configured to capture a color image of the color coded light beam reflected from the first mirror array, wherein the color image includes an array of color coded geometric shapes; anda controller configured to perform image processing on the color image, ...

Logistics storage RFID (radiofrequency identification) tag and process for manufacturing same

The invention relates to an electronic tag, in particular to a logistics storage RFID (radiofrequency identification) tag and a process for manufacturing the same. The process includes transmitting preliminarily designed patterns or information of products to films, printing the patterns or information of the products on an upper base material layer, and then stripping the upper base material layer and a lower base material layer to obtain single strip forms; integrally combining an electronic tag, the stripped upper base material layer and the stripped lower base material layer with one another by the aid of adhesive layers, integrally combining the lower base material layer and a backing paper layer with each other by the aid of a bottom adhesive layer and carrying out die cutting on the electronic tag; printing two-dimensional codes and required logistics information on the upper base material layer of the tag after die cutting is carried out on the tag, and writing information of the ...

UV (ultraviolet) conductive ink and preparation method thereof

The invention belongs to the technical field of inks, and particularly relates to a UV (ultraviolet) conductive ink and a preparation method thereof. The UV conductive ink is prepared from the following raw materials in parts by weight: 30-40 parts of metal conductive particle, 20-40 parts of polymerized prepolymer, 20-25 parts of photosensitive monomer (reactive diluent), 0.5-2 parts of photoinitiator and 1-3 parts of assistants (stabilizer, leveling agent, defoaming agent and dispersing agent). The UV conductive ink can be instantaneously dried and cured under the irradiation of a UV lamp without any external drying device during printing. The UV irradiation curing mode is adopted to reduce the discharge of chemical solvents, enhance the production efficiency and lower the production cost of the RFID (radio frequency identification) antennae. The invention also provides a preparation method which is simple and reasonable in technique.

Optical cross connects including mirror monitoring

Optical cross connects and methods for use therewith are described herein. In an embodiment, an optical cross connect includes first and second mirror arrays, first and second light sources that respectively emit first and second color coded light beams (e.g., each of which includes red, green and blue light), and first and second cameras configured to respectively capture first and second color images of the first and second color coded light beams reflected respectively from the first and second mirror arrays. The optical cross connect also includes a controller configured to perform closed loop feedback control of the first and second mirror arrays, based on the first and second color images, when the controller controls how optical signals are transferred between individual optical fibers in a first bundle of optical fibers and individual optical fibers in a second bundle of optical fibers.

RFID paper-based aluminum antenna production method

The invention belongs to the technical field of antenna production, and particularly relates to an RFID paper-based aluminum antenna production method. The method comprises the following steps that a paper sheets acts as base material and the surface of the base material is pretreated so that a PE-coated paper surface is formed; an isolation layer is coated on the PE-coated paper surface, and the isolation layer is a mixed solution of EVA resin, a tackifier, toluene and acetic ester; the PE-coated paper surface coated by the isolation layer and an aluminum foil layer are coated on a dry compound machine by adopting polyurethane compound adhesive and compacted so that a paper-based aluminum foil is obtained; and the paper-based aluminum foil is installed on die cutting machine, die cutting is performed on the paper-based aluminum foil according to the design shape and the size of an antenna and the redundant aluminum foil is stripped so that the antenna is obtained. Manufacturing cost of ...

THERMAL COMPENSATION FOR BURST-MODE LASER WAVELENGTH DRIFT

Remote anti-theft alarm system for engineering machinery

The invention discloses a remote anti-theft alarm system for engineering machinery, which is characterized by comprising a vehicle-mounted terminal module which is arranged on a center console of a cab of the engineering machinery and an independent remote operation display module, wherein the vehicle-mounted terminal module comprises a central processing unit (CPU) and a power circuit, an execution module, a data acquisition module, a storage module and a general packet radio service (GPRS) communication module which are connected with the CPU; the data acquisition module is arranged on an engineering machinery body; and the CPU is connected with the remote operation display module through the GPRS communication module. A vehicle-mounted terminal is arranged inside the engineering machinery and is connected with the remote operation display module through the GPRS communication module, the engineering machinery is monitored in real time by integrating the remote operation display module ...

Method for detecting cross-sectional force of uncovering-type marker

The invention concretely relates to a method for detecting the cross-sectional force of an uncovering-type marker, detecting the uncovering effect of an uncovering-type marker. The invention is characterized in that a marker to be detected is adhered to flexible material after silicone oil paper is stripped off to be made into a sample; after the sample is rolled to be compacted by a compression roller, the marker to be detected of one end of the sample and the flexible material are respectively clamped on a tensile strength tester and a lower fixture after being stripped, and the tensile strength tester is started until the sub layer of the marker to be detected is pulled apart. The invention solves the defects that test results are greatly influenced by subjectivity and the test results are inaccurate by adopting a free-hand uncovering testing method in detecting the uncovering effect of layer structure anti-counterfeit markers of the prior art. Compared with the free-hand uncovering ...

Detection device and method of rubber-patch metal-resistant RFID labels

The invention relates to a detection device and method of rubber-patch metal-resistant RFID labels. The detection device comprises a desktop reader, a plurality of reader modules are arranged in the desktop reader, and each reader module is connected with a display lamp arranged on the top face of the desktop reader. The detection method includes the steps that the desktop reader is connected with a computer through a data line interface and a power supply interface, the labels are placed on the display lamps on the top face of the desktop reader, and it indicates that the rubber-patch metal-resistant RFID labels are not qualified if one or more display lamps do not work. The labels are recognized one by one in the reading process by the detection device through the detection method, and a good interference resistance effect is achieved between antennae and feeder lines of the reader modules; read UID numbers of the labels can be displayed on the computer and stored, and an Excel form can ...

Optical splitter with absorptive core and reflective grating

An optical splitter has a main branch coupled to a number of tributary branches. The main branch includes a light-absorptive core and a light-reflective grating. The absorptive core can absorb light arriving from the tributary branches and transmit light arriving from the main branch to the reflective grating. The reflective grating can reflect light from the main branch back through the absorptive core to the main branch. Light arriving from the tributary branches exchanges mode with light reflected by the reflective grating.

Method for testing original viscosity of adhesive by adopting vertical tension method

The invention relates to a method for testing the original viscosity of an adhesive by adopting a vertical tension method, belonging to the field of viscosity tests of adhesives and comprising a tension tester. The method is technically characterized by comprising the following steps: firstly, a clean steel ball is vertically hung on the tension tester through a stayguy; secondly, an adhesive tape is flatly adhered to a carrying platform arranged below the clean steel ball; and thirdly, the tension tester is started to enable the clean steel ball to descend with uniform speed of 250 to 350 mm/min until the clean steel ball is in a stationary state on the surface of the adhesive tape, and then the clean steel ball is fast lifted upwards with speed of 250 to 350 mm/min through the tension tester until the clean steel ball leaves the adhesive tape, and the tension tested by the tension tester is the original viscosity of the adhesive. After improving the prior art, the invention has the advantages ...

Electric monitoring system for farming cultivation

The invention discloses a stock raising electronic supervision system, which comprises a stock raising subsystem and a stock raising supervision platform subsystem, wherein the stock raising subsystem comprises a stock raising information acquisition unit and a stock raising database, and the stock raising electronic supervision platform subsystem comprises a supervision platform database and a PC terminal. The stock raising subsystem and the stock raising supervision platform subsystem are connected with each other through the stock raising database and the supervision platform database, the stock raising information acquisition unit is connected with the stock raising database, and a user has access to the supervision platform database through a web browser in the PC terminal. The invention enables the government to supervise stock raising enterprises, live pig butcheries, meat wholesale enterprises and retail stalls, and also enables the public to enquiry the source of pork, the process ...

Laser projection display apparatus and implementing method

The invention provides a laser projection display device and an implement method, wherein the display device comprises the following components: an image signal processing unit, which is used for receiving and processing an input image signal and outputting the brightness of three primary colors in the image signal, and line synchronization voltage and field synchronization voltage corresponding to image display; a light source unit, which controls the output of three-color laser of which the intensity is directly proportional to the brightness of the three primary colors in the image signal;and a light beam scanning unit, which makes a three-color laser beam emitted by the light source unit perform scanning motions in the horizontal direction and the vertical direction, wherein the moving speed is synchronous with a horizontal synchronizing signal and a vertical synchronizing signal provided by the light source unit so that the three-color laser beam scanning in the horizontal direction ...

Oil ink with irreversible temperature change

The invention belongs to the field of temperature-changed oil ink, in particular to oil ink with irreversible temperature change. The oil ink with irreversible temperature change is characterized by comprising 49.3 percent of resin solution of color former, 49.3 percent of resin solution of color developing agent, 0.4 percent of 6800 defoaming agent and 1.0 percent of flatting agent JH-5010. The oil ink with irreversible temperature change overcomes the defect that the temperature-changed oil ink in the prior art cannot prevent secondary transfer and has the advantages of low cost, stable performance and irreversible temperature change. A mark printed by using the oil ink is perfectly combined with an original anti-fake element to achieve the aesthetic effect of an anti-fake mark and the anti-fake effect of preventing the secondary transfer. When the anti-fake mark is heated to uncover the anti-fake mark, the color of the anti-fake mark is changed and irreversible at the same time, so the ...

Thermal Compensation for Burst-Mode Laser Wavelength Drift

An apparatus comprising a laser comprising an active layer and configured to emit an optical signal, wherein a temperature change of the laser causes the optical signal to shift in wavelength, and a heater thermally coupled to the active layer and configured to reduce a wavelength shift of the optical signal by applying heat to the active layer. 1. An apparatus comprising:a laser configured to emit an optical signal during a burst period;a heater thermally coupled to the laser and configured to apply heat the laser; anda driver of an electric current for generating the heat,wherein the electric current is at a first level during a first period before a start of the burst period and at a second level during a second period after the start,wherein the first level is greater than the second level, andwherein the heat is applied to the laser before the start of the burst period to substantially stabilize a temperature of the laser during the burst period.2. The apparatus of claim 1 , wherein the electric current is dedicated to the heater.3. The apparatus of claim 1 , wherein a duration of the heater applying the heat is about 125 microseconds (μs) claim 1 , wherein the temperature varies no more than about 0.2 degrees Celsius (° C.) when the heater applies the heat claim 1 , and wherein the wavelength shift is no more than about 0.02 nanometers (nm) when the heater applies the heat.4. The apparatus of claim 1 , further comprising a driving circuit coupled to the heater and comprising a constant current source configured to generate the electric current.5. The apparatus of claim 4 , wherein the constant current source comprises:a transistor comprising a base; anda diode coupled to the base, andwherein the transistor and the diode have similar voltage-temperature characteristics such that the transistor and the diode are configured to create a constant voltage difference that is substantially independent of an ambient temperature of the driving circuit.6. The apparatus ...

Thermal Compensation for Burst-Mode Laser Wavelength Drift

An apparatus comprising a burst-mode laser comprising an active layer and configured to emit an optical signal during a burst period, wherein a temperature change of the burst-mode laser causes the optical signal to shift in wavelength, and a heater thermally coupled to the active layer and configured to reduce a wavelength shift of the optical signal during the burst period by applying heat to the active layer based on timing of the burst period.

Zoom Assembly, Lens Module, and Electronic Device

This application provides a zoom assembly, including a first refraction component and a first lens apparatus. The first refraction component is configured to change a transmission path of light, and the first refraction component includes a first surface, a second surface, a third surface, and a first reflection structure. The three surfaces of the first refraction component are all transmission surfaces. An optical axis of the first lens apparatus is perpendicular to the second surface of the first refraction component. The first reflection structure is attached to the third surface, and is configured to receive light transmitted by one of the transmission surfaces and reflect the light to another transmission surface. 1. A zoom assembly , comprising:a first refraction prism comprising a first surface, a second surface, a third surface, and a first mirror, wherein the first surface, the second surface, and the third surface of the first refraction prism are transmission surfaces of the first refraction prism, and the first mirror is attached to the third surface, and the first mirror is configured to receive light transmitted by one of the transmission surfaces of the first refraction prism and reflect the light to another of the transmission surfaces of the first refraction prism; anda first lens, wherein an optical axis of the first lens is perpendicular to the second surface of the first refraction prism; and 'the first surface is attached to a focus adjustment lens, the second surface is attached to the focus adjustment lens, or the first mirror comprises the focus adjustment lens and a reflection layer attached to a side of the focus adjustment lens that faces away from the third surface.', 'wherein the first refraction prism meets one or more of the following conditions2. The zoom assembly according to claim 1 , further comprising a first transparent component claim 1 , wherein the first transparent component is attached to the second surface of the first ...

Carrier Density-Based Tunable Filter

An optical filter comprising a first distributed Bragg reflector (DBR) layer, a second DBR layer, and an intrinsic semiconductor layer positioned between the first DBR layer and the second DBR layer, with the intrinsic semiconductor layer providing a passband wavelength for the optical filter based on a carrier density of the intrinsic semiconductor layer.

System, device, and method for detecting perturbations

The device comprise a spatially distributed multimode optical fiber (1200); a photodetector (1300) configured to detect optical signals provided from the fiber; a wireless digital module coupled to the photodetector and adapted to wirelessly transmit (1400) a wireless signal encoding a plurality of detecte d variables of the optical signals; a wireless receiver (1500) adapted to receive the wireless signal; and a signal processing module coupled to said wireless receiver and adapted to decode and interpret the plurality of detected variables of the optical signals.

Active mems damping

Methods and apparatus for reducing the oscillation of a MEMS actuator. In one embodiment, a driving signal is generated to adjust the MEMS actuator through a set of driving wires coupled to the MEMS actuator. A motion-induced signal from the set of driving wires coupled to the MEMS actuator is received in response to the driving signal. The motion-induced signal is filtered to generate a filtered motion-induced signal. The filtered motion-induced signal is amplified to generate an amplified filtered motion-induced signal. The driving signal is adjusted based on the amplified filtered motion-induced signal to reduce the oscillation of the MEMS actuator.

Thermal compensation for burst-mode laser wavelength drift

Active Optical Sensor Providing Near and Far Field Target Detection

An optical sensor module includes a module housing defining a first compartment having a first aperture and a second compartment having a second aperture, with the second aperture spaced apart from the first aperture. A set of optical emitters is disposed in the first compartment and configured to emit light through the first aperture. A first set of optical detectors is disposed in the first compartment and configured to receive a first redirected portion of the emitted light through the first aperture. A set of optical elements is disposed in the first compartment and configured to direct at least a portion of the emitted light or the first redirected portion of the emitted light. A second set of optical detectors is disposed in the second compartment and configured to receive a second redirected portion of the emitted light through the second aperture.

Proximity sensor utilizing optical fibers

A proximity sensor includes a light source configured to emit a beam of optical radiation and a detector configured to output an electrical signal in response to the optical radiation that is incident on the detector. A first optical multimode fiber is configured to receive the emitted beam and to direct the emitted beam toward an object. A second optical multimode fiber is configured to receive the optical radiation reflected from the object and to convey the received optical radiation to the detector. A processor is coupled to process the electrical signal so as to compute a distance to the object.

Jaksottaisen tilan laserin aallonpituussiirtymän lämpökompensointi

Thermal compensation for burst-mode laser wavelength drift

Adaptive heat dissipation

An adaptive heat dissipation apparatus is provided, including two or more chamber walls forming a chamber volume having a first open side and a second open side, a heat source positioned at the first open side of the chamber volume, a heat conducting surface positioned at the second open side of the chamber volume, and a thermally-expansive material occupying a predetermined portion of the chamber volume. The thermally-expansive material expands to substantially fill the chamber volume at an ambient temperature above a predetermined temperature threshold and conducts heat from the heat source to the heat conducting surface. The thermally-expansive material contracts to leave an air gap when the ambient temperature is below the predetermined temperature threshold.

Photoelectric conversion apparatus

Zoom assembly, lens module, and electronic device

This application provides a zoom assembly, including a first refraction component and a first lens apparatus. The first refraction component is configured to change a transmission path of light, and the first refraction component includes a first surface, a second surface, a third surface, and a first reflection structure. The three surfaces of the first refraction component are all transmission surfaces. An optical axis of the first lens apparatus is perpendicular to the second surface of the first refraction component. The first reflection structure is attached to the third surface, and is configured to receive light transmitted by one of the transmission surfaces and reflect the light to another transmission surface.