977results about "Optical apparatus testing" patented technology

Disclosed herein is an optical frequency comb generator for a distributed acoustic anomaly detection system. The system can include a continuous wave frequency modulated laser source configured to generate a laser signal. The system can include an acousto-optical modulator configured to modulate the laser signal by altering an amplitude and / or frequency of the laser signal based on an RF drive signal applied to the AOM, and to output an optical pulse with multiple frequency sidebands based on the modulation. The output can form an optical frequency comb usable detecting and locating acoustic anomalies within a structure under observation.

The invention discloses an intelligent diagnosis system for health and collapse risks of a vertical shaft structure, and relates to the technical field of mine safety monitoring. The acute lesion diagnosis module is used for diagnosing acute physical damage of a sensing optical fiber so as to generate a spatial data confidence index map; the chronic lesion compensation module is used for compensating chronic signal drift caused by internal residual stress relaxation of the sensing optical fiber so as to establish a dynamic zero correction vector; the signal fusion processing module purifies the original apparent strain information through a nonlinear weighting algorithm according to the output of the first two modules, and reconstructs a net structure strain field calibrated by the space-time drift of the instrument; and the collapse risk prediction module is used for intelligently diagnosing and predicting the structural health state and the collapse risk of the vertical shaft. According to the method, the authenticity of monitoring data can be improved from the source, the false alarm rate is greatly reduced, and long-term and weak structural evolution omen are effectively captured.

The invention discloses a vibration monitoring and displacement identification method for a towering steel structure based on machine vision, and relates to the technical field of towering steel structures. Comprising the following steps: S1, visual acquisition and reference calibration: arranging visual acquisition equipment in the height direction and the circumferential direction of the towering steel structure according to mechanical characteristics of a vertical stiffness mutation region and a dynamic response sensitive part of a geometric asymmetric distribution characteristic of the structure; a three-dimensional coordinate system is established based on a structure installation reference surface, fixed reference monitoring points are arranged in a tower foot symmetric area and a mast antenna root, three-dimensional coordinate data of the reference points are synchronously collected, the collection range completely covers a node concentration area and a key stress part of a structure transparent area, and a continuous image sequence of the structure surface is captured in real time; the resolution and the sampling frequency of the visual acquisition equipment are determined according to the inherent frequency of the structure and the vibration response characteristics, and calibration is completed through reference point coordinates after the equipment is installed; s2, carrying out image preprocessing and feature enhancement; S3, carrying out feature point extraction and trajectory tracking; S4, carrying out vibration displacement calculation and twin fusion; and S5, carrying out multi-source verification and structural state linkage treatment.

The invention relates to the technical field of optical measurement, and discloses a biaxial galvanometer error calibration method and system, electronic equipment and a storage medium, and the method comprises the steps: obtaining a camera internal reference containing an internal reference matrix and a distortion coefficient through a calibration board; establishing an ideal geometric transformation model of the biaxial galvanometer, and defining a first galvanometer transformation matrix determined by the rotation angle of the first galvanometer and the first distance and a second galvanometer transformation matrix determined by the rotation angle of the second galvanometer and the second distance; installing error parameters are introduced, and a complete coordinate transformation model used for describing a complete light path transformation relation from an actual camera coordinate system to a final imaging coordinate system is formed; calibration data are collected, galvanometer system parameters and installation error parameters are optimized based on re-projection errors, re-projection residual errors are constructed, the re-projection residual errors are minimized through a nonlinear optimization algorithm, and optimal parameters are obtained. The installation error can be accurately calibrated and effectively compensated.

The invention discloses an optical chip test assembly. The optical chip test assembly comprises a substrate and an optical chip fixed on the substrate, the bearing platform is arranged on the substrate; the metal cover plate covers the optical chip; when a test is carried out, the pressure-bearing table and the metal cover plate bear pressure together, so that the substrate pushes the ejector pin on the PCB test board back, and the substrate is electrically connected with the PCB test board. According to the invention, the pressure bearing platform is arranged on the substrate and is used for bearing the downward pressure, so that the optical chip is protected under the condition of ensuring the successful electric connection with the PCB test board. Meanwhile, the optical chip is also provided with the metal cover plate, and when the optical chip is pressed, the metal cover plate bears pressure at the same time, thereby solving the problem of non-uniform stress.

The invention discloses a method and equipment for detecting a getter of a ring laser based on machine vision, and belongs to the technical field of laser gyroscope detection. According to the method, the thin film image of the getter is collected, the consumption condition of the getter is recognized by combining the color fading property of the getter after the getter reacts with the impurity gas, meanwhile, the getter parameter and the activation parameter of the ring laser are calculated according to the working condition data of the ring laser during standing and working, and the residual gas capacity of the getter is predicted based on the activation parameter. And combining the suction parameters to fit a suction characteristic function of the ring laser, and further predicting the remaining working time of the getter. According to the method, products with unqualified getter allowance can be effectively screened out, and the application reliability of the ring laser in the fields of aviation, spaceflight and the like is improved.

The invention discloses an optimization method for vibration performance of an automobile lamp. The optimization method comprises the following steps: S101, establishing a finite element model of the lamp and performing modal analysis; and S102, carrying out a modal test by using the lamp. And S103, comparing a modal analysis result in the step S101 with a modal test result in the step S102, confirming a vibration mode and calibrating the finite element model. And S104, submitting modal calculation according to a calibration result, completing boundary condition setting, and performing random vibration simulation. And S105, carrying out a random vibration test on the lamp by using the PSD power spectrum. And S106, comparing a random vibration simulation result in the step S104 with a random vibration test result in the step S105, confirming the reliability of the model and correcting the finite element model. And S107, determining a dangerous area according to a vibration test result and a vibration simulation result, and checking a risk point optimization data structure. And S108, modifying data according to an optimization result, verifying a random vibration simulation result of the new model, and performing vibration test retest after confirming feasibility.

A platform screen door for rail transit. By means of providing a monitoring sensor (12) and a fault early-warning device (13) for a screen door, real-time operation data of the screen door is acquired, and the real-time operation data is then input into a pre-constructed prediction model; on the basis of the prediction model, multi-round cyclic segmented prediction is performed on the real-time operation data, so as to output an operation prediction result at each time node within a target time period, wherein one piece of segmented-prediction data for the target time period is output by means of each round of prediction, and the obtained segmented-prediction data and the real-time operation data are used as model input data for the next round of prediction; and the operation prediction result is input into a pre-constructed fault monitoring model, and on the basis of the fault monitoring model, a fault type monitoring result at a corresponding time node is output. By means of the technical means, a potential fault type at a corresponding time node can be detected in a timely manner, such that accurate and efficient fault monitoring is realized, thereby improving the reliability and stability of operation of a screen door.

The invention relates to a method for the mechatronic qualification of the optical system (30) of a semiconductor technology system (1), wherein the optical system (30) comprises at least one optical component (32, 34) that is movable between target positions (46, 52) within a travel range (40), wherein the at least one optical component (32, 34) is moved along at least one possible predetermined travel path (48) between at least two of the target positions (46, 52) and / or wherein the at least one optical component (32, 34) is held at at least one of the target positions (46, 52) in the travel range (40) (holding position), wherein at least one measured value relating to the travel movement is acquired and recorded along the at least one possible predetermined travel path (46) and / or wherein the actual position (54) of the at least one optical component (32, 34) is acquired and compared with the holding position.and in which at least one measurement and / or comparison regarding the presence of at least one defect of the optical system (30) is analyzed.

The invention discloses a hollow-core anti-resonance optical fiber capable of breakpoint detection, a production method thereof and an optical cable, and belongs to the technical field of hollow-core optical fibers, the hollow-core anti-resonance optical fiber comprises an anti-resonance unit coated by a cladding, at least one solid fiber core made of germanium-doped fiber cores is arranged in the cladding, and the solid fiber cores are uniformly and spirally arranged on the periphery of the anti-resonance unit, so that the breakpoint of the hollow-core anti-resonance optical fiber can be detected. Therefore, the hollow-core optical fiber not only meets the application requirement of the anti-resonance effect, but also has the use function of breakpoint detection. The hollow-core anti-resonance optical fiber capable of breakpoint detection is simple in structure and convenient to produce and use, the anti-resonance effect of the hollow-core optical fiber can be met, breakpoint detection of the hollow-core optical fiber can be achieved on the premise that the anti-resonance use performance of the hollow-core optical fiber is not affected, and the service life of the hollow-core optical fiber is prolonged. The application of a conventional breakpoint detection technology (such as an OTDR technology) in the hollow-core optical fiber is effectively realized, the convenience and reliability of application and maintenance of the hollow-core optical fiber are further improved, the comprehensive performance of the hollow-core optical fiber is expanded, and the hollow-core optical fiber has a relatively good practical value.

The invention discloses a quick-change universal optical adjusting frame device and an optical instrument, and the device comprises a mirror bracket which comprises a mirror bracket body, a sub-mirror bracket, a fixing ring, a first fixing part and a second fixing part. The mirror bracket body is provided with a first stepped hole, and the sub-mirror bracket is provided with a second stepped hole; the second lens is located between the fixing ring and the second step surface of the second step hole, and the fixing ring is detachably arranged in the second step hole and enables the second lens to be tightly pressed on the second step surface during installation; a first fixing hole is formed in the spectacle frame body and is communicated with the first mounting hole; the first fixing piece is arranged in the first fixing hole, and the inner end extends into the first mounting hole for a set length; one end of the second fixing piece is detachably arranged on the mirror bracket body, and the other end of the second fixing piece is pressed on the outer side face of the sub-mirror bracket so that the inner side face of the sub-mirror bracket can be tightly pressed on the first step face of the first step hole. And through the detachable assembly design of the spectacle frame body and the sub-spectacle frame, the function of quickly changing the lenses with different sizes is realized.

The invention relates to an optical system, in particular for microlithography, comprising at least one optical element (100, 200, 300, 400) which has a substrate (105, 205, 305, 405) and at least one optically active layer system (110, 210, 310, 311, 410) located on this substrate (105, 205, 305, 405), and at least one monitoring unit (120, 220, 240, 320, 340) for monitoring a degradation state of this layer system (110, 210, 310, 311, 410), wherein the monitoring unit (120, 220, 240, 320, 340) has a detector (121, 221, 241, 321, 341) for detecting non-directional radiation (130, 230, 330, 430) which is emitted by the optical element (100, 200, 300, 400) during the operation of the optical system.

The utility model relates to the technical field of flexible display screen testing, in particular to a folding testing device for a flexible display screen. The utility model provides a flexible display screen folding test device, which comprises a base, a fixed frame, a protective door, a support table, motors, an overturning plate, a clamping piece, a sector gear and the like, the fixed frame is arranged on the base, the protective door is rotatably arranged on the front side of the fixed frame, the support table is arranged on the front side of the top of the base, and the motors are arranged on the left and right sides of the top of the base. A turnover plate is arranged between output shafts of the motors, clamping pieces are arranged on the top of the turnover plate and the top of the supporting table in a bilateral symmetry mode, the output shafts of the motors are further connected with sector gears, and the bumping testing assembly is arranged on the top of the fixing frame. The motor drives the sector gear to rotate, so that the lifting frame moves up and down, the bumping condition of the flexible display screen is simulated, the durability and performance of the display screen in a dynamic environment can be comprehensively evaluated in combination with the folding test of the turnover plate, and the test accuracy is improved.

The invention discloses an online detection system and method for optical indexes of a hollow-core optical fiber, and relates to the technical field of optical performance detection of optical fibers, and the system comprises an optical fiber connection module, an optical performance detection module, a production linkage module and a data interaction module. The method comprises the following steps: welding the inner end of a production optical fiber with a system at one time; the industrial personal computer reads PLC production data and generates a test trigger condition; when the conditions are met, controlling the OTDR to test the optical indexes of the optical fiber; carrying out segment processing on the OTDR curve by using an improved Viterbi algorithm so as to identify fault features; performing automatic environment compensation based on an attenuation reference model established by the LSTM neural network; and finally, uploading the analysis data to a manufacturing execution system. According to the invention, on-line, real-time and accurate detection of the optical indexes of the hollow-core fiber is realized, traditional multi-time welding is replaced by one-time welding, the detection efficiency is greatly improved, and the problems of poor sealing performance, low efficiency and low data reliability in the prior art are solved.

A monitoring device (46) is used to monitor an EUV collector of a projection exposure system. A detector assembly (38) of the monitoring device (46) has at least one stray light detector (47). i ) for detecting stray light radiation (20) with a stray light wavelength that differs from the useful light wavelength of useful light (3) generated by an EUV light source (2) by at least 10%, wherein the stray light radiation (20), originating from a component of the EUV light source, is reflected at a collector surface of the EUV collector. A detection component (37; 32) of the detector device (38) can be arranged in an illumination optics array (40) that is optically conjugated to a collector array of the EUV collector. Due to the monitoring, an increased collector efficiency can result.

An inspection and a method for the automated identification of an undesired deformation of an edge of a crossbeam of a shelf are disclosed, the method comprising the steps of: projecting, with a laser, a structured light pattern onto the inspection area, wherein the light pattern is aligned parallel to the inspection area and positioned in close proximity to the inspection area; capturing, with a camera, a raw image of the supporting element, which includes at least part of the inspection area and a reflection of the projected light pattern; generating an inspection image from the raw image by computer, wherein lines are extracted from the reflected light pattern of the raw image and converted into a line pattern and stored as the inspection image, and wherein straight lines are selected from the line pattern, in particular by means of a Hough transform;Computer-implemented verification, in the test image, of whether the selected lines include a broken straight line and / or a straight line with a different slope; and computer-implemented determination that the test area exhibits damage caused by deformation if the broken straight line and / or the straight line with the different slope is present.

The invention relates to an optical anti-shake test method and system, computer equipment and a storage medium. The method comprises the following steps: generating a simulation motion sensor signal without physical vibration according to a preset waveform parameter; the simulation motion sensor signal is applied to a target optical anti-shake module so as to drive a motor to perform anti-shake motion; performing target reference point tracking identification on a target plate image acquired by an image sensor, and fitting to obtain an actually measured motion curve of a target reference point in the target plate image; determining a theoretical motion curve of a target reference point in the target plate image according to the preset waveform parameter and the actually measured motion curve; and determining a test result of the target optical anti-vibration module according to a deviation calculation result of the actually measured motion curve and the theoretical motion curve. By adopting the method, the efficiency and the accuracy of the optical anti-shake test can be improved.

The invention discloses an optical chip testing system which comprises an optical chip testing assembly and a slot assembly used for installing the optical chip testing assembly for testing. The optical chip test assembly comprises a substrate and an optical chip fixed on the substrate. The bearing platform is arranged on the substrate; the metal cover plate covers the optical chip; the slot assembly comprises a slot base and a top cover; the slot base comprises a slot and a protection cofferdam arranged on the periphery of the slot; a fixed pressing block acting on the pressure bearing table and a floating pressing block acting on the metal cover plate are arranged on the top cover; and the top cover and the slot base are respectively provided with connecting mechanisms which are connected in a matched manner. The optical chip temperature testing device is designed for a special mechanism of the optical chip and is used for testing the temperature of the optical chip.

The invention discloses a UVB control method and system for laying hen breeding, and the method comprises the steps: arranging a multi-band UVB intelligent light supplement lamp and an illumination intensity sensor in a henhouse, building an intelligent illumination regulation and control module based on a laying hen growth model, and building communication. The system obtains laying hen growth parameters and real-time illumination data, and determines and controls parameters of a light supplement lamp. According to the method, the UVB illumination time, intensity and wavelength can be accurately regulated and controlled according to factors such as different growth stages of laying hens, seasonal changes and breeding environments, and the UVB illumination time, intensity and wavelength can be accurately regulated and controlled according to different growth stages of laying hens, seasonal changes, breeding environments and the like; the method is an innovative method which can be cooperatively controlled with other breeding environment factors, so that the egg laying performance, egg quality and overall health level of laying hens are improved.

The application discloses a kind of high-pressure roller mill roll surface online abnormal diagnosis system and method, belong to high-pressure roller mill diagnosis technical field, system is deployed in equipment exterior, including laser scanning unit, positioning synchronous unit, electric window and data processing and control unit.Method by positioning synchronous unit accurate control laser scanning unit scanning opportunity and frequency, when electric window is automatically opened, three-dimensional point cloud of roll surface is collected by external laser scanning unit, then closure window, again by data processing and control unit analysis diagnosis.The application is isolated by " external detection + special window " innovative architecture, laser camera and harsh working condition environment, realizes the standardization and high reliability of system;Using the combination of double encoder and physical target, solve the problem of high-precision synchronous acquisition and data positioning under uneven roll speed, realize the non-stop, full-automatic, quantitative roll surface stud wear and abnormal diagnosis, and can assist on-site personnel to quickly locate abnormal point.

The invention relates to the technical field of laser cutting, and discloses a steel plate laser cutting machine fault detection method and system, and the method comprises the steps: collecting a driving power supply current signal in real time, and filtering a DC component to obtain an AC sequence; separating multi-scale sub-band components containing Gaussian noise by using wavelet transform; performing empirical mode decomposition on the sub-band components, and extracting an intrinsic mode function component set; calculating a kurtosis value and a kurtosis change rate of the component and a phase coupling index based on bispectrum analysis, and constructing a high-order statistical feature vector; a support vector machine is adopted to classify the feature vectors so as to output operation state category labels; generating a fault early warning grade value by combining the tag risk value and the kurtosis evolution trend slope; and the historical state sliding window sequence and the fault confirmation confidence coefficient are used for verification, and the early fault state is confirmed. According to the method, the problem of low nonlinear fault feature extraction accuracy under a complex noise interference background in the prior art can be solved.

This suppresses the generation of ghosting in the optical path from the polarization controller to the multiplexing optical coupler. [Solution] The extinction ratio monitoring type polarization rotation system 10 is installed in the optical path between a third optical coupler 3 that is incident on the measurement light from the light source and emits reflected light L2 reflected by the optical circuit under test, and a fourth optical coupler 4 that combines the reference light L1 and the reflected light L2. It includes a polarization controller 11 that can change the polarization state of the incident light in various ways and controls the emitted light to a predetermined polarization state, a branching unit 12, a polarizer unit 13, and a monitor unit 14 that monitors the extinction ratio. Based on the output of the monitor unit 14, the set values ​​of the polarization controller 11 that result in the output of the maximum light intensity and the output of the minimum light intensity where the polarization states are orthogonal are stored in the memory unit. After switching these settings, the intensity of each beat signal is measured using a differential amplifier 7, making it possible to detect defective parts of the optical circuit X under test without false detection.

The invention provides a test fixture for a photoelectric microsystem. The test fixture comprises a test seat and a test plate, the test seat comprises a cooling device, an adapter plate, a needle frame and a heat sink; the cooling device is fixed to the heat sink and used for cooling the heat sink. The heat sink provides downward pressing force, so that the elastic contact of the photoelectric microsystem is connected to the adapter plate, and meanwhile, the adapter plate is pressed on the pin frame; the needle frame is made of metal and is used as a ground network; the signal pins are fixed on the pin frame through the dielectric ring to form signal point locations; the power needles are fixed on the needle frame through the medium rings to form power source point positions; the power needle is directly fixed on the needle frame to form a site; the signal pin and the power pin are connected with the test board; by adjusting the installed signal pin and the power pin, the photoelectric micro-system test with different pin definitions can be adapted.

The application provides a double-end optical lightning stroke positioning method and system applied to power overhead optical cables, and relates to the technical field of optical fiber sensing; the basic principle of positioning is to realize single-end lightning stroke positioning based on the obvious change of the polarization state of optical signals after the optical signals encounter lightning strokes; the application first uses counter-transmitted pulse polarized light to detect a single-end lightning stroke positioning point, then establishes a double-end positioning equation set to solve an actual lightning stroke positioning point, so that accurate lightning stroke positioning is realized; the application uses the Faraday optical rotation effect of lightning strokes on optical signals to realize lightning stroke positioning based on a polarized light time domain reflectometer; compared with traditional lightning stroke positioning, the application has low operation and maintenance cost, high precision, does not need wide-area accurate time synchronization, has a simple system, is convenient to install, and reduces the blind area of lightning stroke positioning.

In-vehicle system that includes: a illuminating unit (105) that illuminates an area different from a set light shielding area with light; an image-generating unit (101) that images an area containing an illumination area of ​​the light emitted by the illumination unit (105) in order to capture a recorded image; an object detection unit (254) that detects from the recorded image a non-target object that should not be illuminated with the light; a direct illumination prevention unit (255) which calculates the light shielding area based on the position of the non-target object in the captured image and correction information and sets the light shielding area in the illumination unit (105); a correction timing light shielding area setting unit (256) that sets the specified light shielding area in the illumination unit (105); and a correction calculation unit (257) that calculates the correction information based on the captured image when the correction timing light shielding area setting unit (256) sets the light shielding area in the illumination unit (105), wherein the correction calculation unit (257) outputs the calculated correction information to the image generation unit (101), and the image generation unit (101) determines an output area based on the correction information as the captured image, wherein the correction information is a deviation between a center position of the beam area of ​​the beam unit (105) and a center position of an image generation area of ​​the image generation unit (101).

This contributes to LED inspection, enabling rapid response to changes in the model of the equipment being inspected. [Solution] An LED inspection device for an inspection target device having multiple LEDs. The LED inspection device includes a storage unit that stores the model of the inspection target device, the number of LEDs, the lighting color of the LEDs, and the inspection items; an image acquisition unit that acquires an image of the entire inspection target device; a model identification unit that identifies the model of the inspection target device by inputting the image of the entire inspection target device into a model identification model; a lighting state acquisition unit that acquires the lighting state of the specified inspection target device by inputting an image of the entire specified inspection target device in a state where the LEDs are lit according to predetermined inspection items of the specified inspection target device into a lighting detection model; and a determination unit that determines the inspection result for the specified inspection target device by comparing the lighting state acquired for the specified inspection target device with the correct lighting state for the predetermined inspection items.

The purpose of the present invention is to provide an optical fiber alignment method, an optical fiber connector manufacturing method, an optical fiber alignment device, and an optical fiber fusion splicing machine with which it is possible to suitably perform alignment in the circumferential direction.　This alignment device (200) comprises: imaging units (105A), (105B) that perform one round's worth of capturing side images in the circumferential direction of a pair of optical fibers (10A), (10B) at a plurality of focus positions; a feature value calculation unit (112) that, for each focus position, performs one round's worth of calculating feature values obtained by digitizing features of the side images for the respective optical fibers (10A), (10B); an asymmetry calculation unit (113) that, for each focus position, calculates the asymmetry of a cross-correlation between the one round's worth of feature values of the respective optical fibers (10A), (10B); a focus position selection unit (114) that selects specific focus positions among focus positions having a prescribed asymmetry or higher; and a rotation alignment unit that performs alignment in the circumferential direction of the pair of optical fibers (10A) (10B) on the basis of the one round's worth of side images of the respective optical fibers (10A), (10B) at the selected focus positions.

A lithographic apparatus includes a projection system and an inspection system including a radiation system, a photonic integrated circuit system, and a detector system. The projection system projects an image of the patterning device onto a substrate. The radiation system directs radiation toward a target on the substrate to generate scattered radiation from the target. The radiation system includes a radiation source for generating radiation and an optical system for focusing the radiation onto a target. A photonic integrated circuit system includes a waveguide system integrated on a board and a radiation coupler disposed at a waveguide of the waveguide system. The radiation coupler initiates at least a portion of the scattered radiation into the waveguide system. A detector system receives the scattered radiation from the waveguide system and generates a measurement signal based on the scattered radiation.

To provide an imaging apparatus capable of maintaining the identity of the timing of combined image data even when the omission of the image data occurs on an analyzer side.SOLUTION: The imaging device 1 includes the first image sensor 51 that detects the brightness of the reflected light Lr from the first prism 3 to generate the reflected light brightness data Dr, the second image sensor 61 that detects the brightness of the transmitted light Lt from the second prism 4 to generate the transmitted light brightness data Dt, and the processor P that generates the reflected light image data Gr and the transmitted light image data Gt based on the reflected light brightness data Dr and the transmitted light brightness data Dt output from the first image sensor 51 and the second image sensor 61 at the same timing and generates the image data set Gs in which the image data based on the reflected light image data Gr and the transmitted light image data Gt is combined.SELECTED DRAWING: Figure 3

A lamp aiming method is implemented in an electronic lamp aiming system for a vehicle. In the system and method, a controller recognizes a light distribution area using information of a target in top / bottom / left / right angles in a front image of an image receiver for the target, which is light-distributed to a light source of a head lamp. Another controller adjusts a pixel area of the light source based on the light distribution area to perform aiming correction and to apply the adjusted pixel area to the light distribution of the lamp. Through an electronic aiming structure not using head lamp aiming instruments, direct matching is achieved between the head lamp and a camera, which is required for high-precision aiming. A vehicle attitude can also be determined without sensors by using the secured matching.