214results about How to "Fast measurement" patented technology

The invention provides a corrugated plate depth measurement method and system, a storage medium and electronic equipment. The method comprises the following steps: acquiring point cloud data corresponding to a target corrugated plate through a preset line laser corrugated plate test device; according to the point cloud data, simplifying the point cloud data through a first preset method to determine target point cloud data; performing local feature extraction on the target point cloud data through a second preset method according to the target point cloud data to obtain local key point data; determining local spline point data through a third preset method according to the local key point data and the target point cloud data, and determining a local spline curve according to the local spline point data; target extreme points are determined according to the local spline curve, and the target corrugated plate depth is determined according to the distance between the adjacent target extreme points. According to the invention, the problem that there is no method for rapidly and accurately measuring the depth of the corrugated plate in the prior art is solved.

The invention discloses a steel rail geometric dimension detection method based on three-dimensional laser scanning. The method comprises the following steps: S1, arranging a three-dimensional laser scanner and a prism ball; s2, establishing a design coordinate system, and registering prism ball point cloud coordinates collected by a three-dimensional laser scanner; s3, steel rail point cloud is collected, and the collected steel rail point cloud is preprocessed; s4, extracting section contour features of the steel rail; and S5, the size of the steel rail is detected and corrected. The three-dimensional laser scanning technology is adopted to detect the steel rail, compared with a traditional contact type measuring method, the measuring speed can be remarkably increased, the labor intensity of workers can be reduced, the continuous high-precision steel rail can be obtained through fitting by collecting a large amount of point cloud data, and the measured data accuracy is higher.

The invention discloses an MEMS composite film stress gradient measuring device and method. The measuring device comprises a V-shaped thermal actuator structure, a displacement measuring structure connected with the V-shaped thermal actuator structure and a multi-layer cantilever beam structure. The method comprises the steps that a V-shaped thermal actuator structure is used for pushing a displacement measurement structure to move towards a multi-layer cantilever beam structure, and when a contact electrode of the displacement measurement structure makes contact with a to-be-measured beam of the multi-layer cantilever beam structure, a horizontal displacement value s is obtained through reading of the displacement measurement structure; calculating the equivalent stress gradient of the composite film according to the geometric dimension of the measuring device, the horizontal displacement value s and the Young modulus of each layer of film; the MEMS composite film stress gradient measuring device and method have the advantages of being easy to operate, low in cost and high in measuring speed, and can be used for parameter monitoring of a process line.

The invention provides a wafer three-dimensional shape detection method based on sparse sampling, and the method comprises the steps: 1, carrying out the longitudinal scanning of each pixel point of a to-be-detected wafer based on a white light interference measurement method, and obtaining an interference signal # imgabs0 # in a longitudinal scanning range at a certain sampling step length; 2, during longitudinal scanning, a sparse sampling mode of equal-phase interval sampling is adopted, the sampling interval used by scanning sampling is n more than the full sampling interval, and sparse sampling interference signals are obtained; and 3, processing a sparse sampling interference signal obtained from the surface of the wafer to be measured by using an improved gravity center method, and reconstructing the three-dimensional shape of the wafer.

The invention discloses an implementation method and device for fast scanning CRDS sensing, and relates to the technical field of ring-down cavities, and the method comprises the following steps: employing a PID algorithm to control and adjust the temperature and pressure in a ring-down cavity to stabilize the resonance mode of the ring-down cavity, and carrying out the collection operation of a cavity mode signal after the adjustment of the temperature and pressure is completed; obtaining a wavelength value of the laser light source after entering the etalon based on the transmittance value, feeding back the wavelength value to a wavelength controller, and adjusting the laser to a spectrum detection wavelength by using the wavelength controller; scanning operation is executed based on the detection wavelength to determine the resonant wavelength, secondary scanning is performed with the resonant wavelength as the center to obtain a ring-down curve, and gas characteristic absorption line measurement is completed through point-by-point scanning. According to the invention, the etalon, the precise wavelength locking and adjusting system and the unique cavity mode scanning mode are utilized to realize high-repetition-frequency rapid scanning of the ring-down signal, so that the triggering speed of the ring-down event is improved.

The invention discloses a tobacco leaf flatness measuring device and method based on machine vision, and relates to the technical field of cigar tobacco leaf flatness measurement. The tobacco leaf flatness measuring device comprises a main body table top, a tobacco leaf placing table is arranged on the main body table top, an industrial camera is arranged on one side of the tobacco leaf placing table, and laser range finders are arranged above the tobacco leaf placing table in a transverse and longitudinal sliding mode; a rotary lifting frame is arranged on one side of the tobacco leaf containing table in the longitudinal direction in a sliding mode, projection lamps are evenly distributed on the rotary lifting frame, and a leveling device is arranged on one side of the tobacco leaf containing table in the longitudinal direction in a sliding mode. The method solves the problems that in production in the traditional technology, the method for measuring the flatness of the tobacco leaves still adopts manual subjective judgment, errors are large, clear and unified standards do not exist and the like, and the manual judgment method mostly carries out indirect judgment through the flatness degree of the main veins and the branch veins of the tobacco leaves. And direct measurement of the flatness of the complete leaf surface of the cigar tobacco cannot be realized.

The embodiment of the invention discloses a temperature measurement method and device based on infrared thermal imaging, in the embodiment, a non-contact temperature measurement mode is adopted, the temperature measurement range is wider, the measurement speed is high, a plurality of temperature measurement groups are set according to actual requirements, each temperature measurement group comprises a plurality of temperature measurement elements, and the temperature measurement efficiency is improved. However, the types of the temperature measurement elements of each temperature measurement group must be the same, thereby guaranteeing the consistency of subsequent data analysis, and carrying out the real-time temperature data collection of each temperature measurement group through employing an infrared thermal imaging device. According to the method, the accuracy and the real-time performance of data acquisition are ensured, so that subsequent accurate data analysis is facilitated, a temperature measurement element of which the correlation with the temperature data is greater than a set threshold value is selected as a target factor, a temperature curve is generated according to the target factor and the temperature data, and a temperature measurement formula is established according to the temperature curve, so that the temperature measurement precision requirement is met.

The invention discloses a TGD-OFDR / OCC-BOTDR integrated multi-parameter sensing system and a working method thereof, and relates to the technical field of optical fiber sensors. The multi-parameter sensing system comprises a laser, an optical fiber coupler, an electro-optical modulator, an optical fiber circulator, an optical fiber Bragg grating, an acoustic optical modulator, an erbium-doped optical fiber amplifier, a random scrambler, a piezoelectric ceramic tube, a heating vessel, a delay optical fiber, a photoelectric balance detector, a filter and detector, a data acquisition card, a polarization controller, a direct-current power supply and a microwave source. An arbitrary waveform generator and the like. According to the invention, multiple parameters can be represented at the same time, the measuring speed is fast, and the sampling rate of the system can be effectively improved under the condition that sensing parameters are the same; the method has the advantage of high spatial resolution; the sensor has the advantages of high fusion and low cost, can realize simultaneous measurement of vibration and temperature / strain through single sensing, and is high in fusion and effective in cost control.

The invention discloses an MEMS double-layer film Young modulus measuring device and method, the measuring device comprises three subsections, and each subsection comprises a thermal actuator structure, a displacement measuring structure connected with the thermal actuator structure and a double-layer cantilever beam structure; the method comprises the steps that a thermal actuator structure is used for pushing a displacement measurement structure to move towards a double-layer cantilever beam structure, and when a contact electrode of the displacement measurement structure makes contact with a to-be-measured beam of the double-layer cantilever beam structure, horizontal displacement values s1, s2 and s3 of three subsections are obtained through readings of the displacement measurement structure; the physical dimension and the horizontal displacement values s1, s2 and s3 of the measuring device are substituted into an equation to solve the Young modulus of the double-layer film; the MEMS double-layer film Young modulus measuring device and method have the advantages of being easy to operate, low in cost and high in measuring speed, and can be used for parameter monitoring of a process line.

The invention discloses a coal dust influence suppression method for coal mine gas laser detection and a detection device, and the method comprises the steps: extracting gas in a coal mine goaf through a gas pump and a beam tube of the coal mine gas laser detection device, and detecting a characteristic absorption spectrum of the gas in the goaf by adopting a TDLAS technology; correcting a second harmonic signal and a peak value in the characteristic absorption spectrum by considering the attenuation influence of the coal dust in the goaf gas on the second harmonic signal of the laser penetrating through the goaf gas; and obtaining the accurate concentration value of each component gas in the goaf gas by using the corrected second harmonic signal peak value. According to the invention, the influence of coal dust on gas concentration detection can be greatly reduced, the sensitivity of gas detection is improved, and good detection effect and precision can be achieved.

This invention proposes a method for detecting chemical oxygen demand (COD) in water based on laser spectroscopy, comprising the following steps: Step 1, shining a laser beam into a water sample to be tested, causing the water sample to generate a light signal upon laser excitation; Step 2, receiving the light signal using a spectrometer, converting it into an electrical signal, and then into a digital signal; Step 3, receiving the digital signal through a data processing system to form a spectral curve; Step 4, calculating the relative integrated fluorescence intensity I based on the information in the spectral curve. T λ1 and λ2 are the starting and ending wavelengths of the fluorescence spectrum, respectively, and Iλ represents the fluorescence intensity at wavelength λ. r This represents the light intensity of the Raman peak after subtracting the fluorescence background; Step 5: Calculate the COD value of the water sample according to the chemical oxygen demand formula for water quality. The chemical oxygen demand formula for water quality is COD = KI T +C. The above detection method can greatly reduce the influence of various interference factors on COD detection results, and has the advantages of high sensitivity, fast measurement speed, convenient measurement, and high accuracy.

The invention relates to the technical field of building construction, in particular to a bridge pile foundation steel casing positioning device which comprises a bottom plate and a sleeve, a side plate is fixedly mounted at the upper end of the bottom plate, an arc-shaped push plate is mounted at the inner end of the side plate through a hydraulic cylinder, the sleeve is square, and square tubes are mounted on the four sides of the outer end of the sleeve through connecting parts. The left side and the right side of the lower end of each square tube are each fixedly provided with a side plate, the lower end of each side plate is slidably connected with a limiting plate, the prism is installed among the four clamping blocks, the center position of the steel casing is actually measured, and it is guaranteed that the center of the prism coincides with the center of the steel casing; the device can track and measure the center coordinate value of the steel casing represented by the prism in real time according to the total station, compare the center coordinate value with the center design coordinate of the pile foundation to calculate the deviation value, and adjust the position of the steel casing according to the deviation value so as to finish the accurate positioning of the steel casing, and has the advantages of simple structure, simplicity and convenience in operation, stability, reliability, low manufacturing cost, high measurement speed, accurate measurement result and the like.

The intelligent actual measurement robot comprises a chassis, a damping frame, a measuring mechanism and a pattern spraying mechanism, the measuring mechanism comprises a three-dimensional laser scanner, one side of the three-dimensional laser scanner is fixedly connected with a protective glass shell, one side of the protective glass shell is fixedly connected with a third motor, and the third motor is fixedly connected with a fourth motor. The output end of the third motor is fixedly connected with a brush rod, the pattern spraying mechanism comprises a coating box, second air cylinders are symmetrically arranged on one side of the coating box, the output end of each second air cylinder is fixedly connected with a third air cylinder, and the measuring mechanism is used for comprehensively scanning a house and has the advantages of being not affected by the environment, high in measuring speed and accurate in measuring. The third motor can rotate to drive the brush rod to rotate at the outer end of the protective glass shell, so that dust adhered to the surface of the outer end of the brush rod is cleaned away, the scanning definition is improved, and the device can automatically move and measure, is good in maneuverability, is accurate in measurement, is not affected by the environment, and is high in measurement speed.

According to the grain friction coefficient measuring device and the measuring method thereof, the sensor is used for judging grain falling, the inclination angle during static friction measurement is controlled through a sensor signal, the precision is high, measurement is carried out according to multiple grains falling for multiple times, the measuring efficiency is high, and the measuring precision is high. And the static and dynamic friction coefficients of the same sampling batch can be continuously measured. According to the measuring method, the average angle is calculated through weight of different falling angles and the number of multiple grains sampled at a time, and the method is closer to a static friction test of a comprehensive whole. Comprising a static friction measuring table used for measuring the static friction coefficient, and a disc collecting bin mechanism used for receiving materials falling from the static friction measuring table at different inclination angles; the single-grain discharging mechanism is used for receiving the materials output by the discharging holes and discharging the materials in a single-grain mode. And the dynamic friction coefficient measuring mechanism is used for receiving the material falling from the single grain discharging mechanism and measuring the dynamic friction coefficient of the grains.

The utility model relates to the technical field of power transmission lines, and discloses a power transmission line overhead conductor sag measuring device which comprises a spherical shaft rotationally arranged in the middle of the interior of a main plate, movable plates are arranged at the two ends of the outer surface of a bidirectional lead screw in a threaded and sleeved mode, and a second fluted disc is rotationally inserted in the top of the middle of a connecting frame. A limiting assembly is arranged on the outer surface of the second fluted disc. According to the power transmission line overhead conductor sag measuring device, through cooperative arrangement of the main board, the motor, the connecting frame, the bubble level, the spherical shaft, the bidirectional screw rod, the moving plate, the abutting column and the screw rod, the measuring instrument can be in a relatively horizontal state, the measurement accuracy can be increased conveniently, and the operation process is faster and more convenient; through cooperative arrangement of the connecting frame, the screw rod, the screw sleeve, the first fluted disc, the second fluted disc and the limiting assembly, the measuring instrument can be effectively fixed after the transverse angle of the measuring instrument is adjusted, the fixing firmness is high, and the measuring instrument is not prone to loosening.

The utility model relates to the field of concentricity measurement, and provides a concentricity measuring device. The concentricity measuring device comprises a measuring trolley, a first displacement sensor and a second displacement sensor. And the measuring trolley is adsorbed on the peripheral surface of the first wheel body and can crawl along the circumferential direction of the first wheel body. A cantilever is arranged on the side, facing the second wheel body, of the measuring trolley. The first displacement sensor and the second displacement sensor are arranged at intervals in the axial direction of the first wheel body and are both installed on the cantilever. The first displacement sensor points to the peripheral face of the first wheel body, and the second displacement sensor points to the peripheral face of the second wheel body. According to the concentricity measuring device, a jacking oil pump does not need to be started, a rotor shaft system does not need to be turned by manpower or a power device, and the concentricity relative deviation between the first wheel body and the second wheel body can be measured through the first displacement sensor and the second displacement sensor only by climbing the measuring trolley on the peripheral surface of the first wheel body; time and labor can be saved, even concentricity measurement operation can be automatically achieved, and manpower and time can be saved.

The invention discloses a coal pile porosity measuring method based on coal-water two-phase permeation. The existing measuring method has the defects of complicated operation, unsuitability for field measurement or capability of only measuring the porosity in pores in coal. The method comprises the following steps; in the coal loading process of coal piles of different coal types, multiple positions are selected on a coal pile platform, coal on the top face is scraped off, a coal pit is dug, and all coal in the pit is collected; drying the collected coal sample; filling the dried coal sample into a container with known volume and weight, compacting with a rubber hammer, weighing the gross weight, and calculating the apparent density; the total porosity of particles is calculated according to the density of water, the internal porosity is taken, and a coal pile porosity and coal pile height curve graph is established by taking porosity data measured on three coal pile platforms with different heights as horizontal coordinates and coal pile heights as vertical coordinates. When in use, the porosity among the coal particles of the coal pile at the corresponding height can be found from the curve graph. The method is used for measuring the porosity of the coal pile.

The invention relates to the technical field of laser wavelength measurement, in particular to an optical wavelength measurement device based on a band-pass filter and a wavelength measurement calibration method, and the device comprises a single-mode optical fiber, and the band-pass filter and a camera which are sequentially arranged along the propagation direction of incident light; the single-mode optical fiber is used for receiving incident light with a wavelength to be measured; the band-pass filter is arranged at a certain angle relative to the direction of incident light, so that the incident light enters at a certain angle when reaching the band-pass filter, and the band-pass filter generates different spectral responses for the incident light with different wavelengths, so that the light field intensity distribution after passing through the band-pass filter generates different changes; and the camera is used for shooting and recording light field intensity distribution after passing through the band-pass filter. Operation is simple and convenient, and cost is low; the measurement speed is high and the measurement is accurate; the device is simple in structure, small in size and convenient to integrate and carry.

The invention discloses a method for measuring and adjusting the height of a dock linear docking block, which comprises the following steps of: marking a measuring datum line on a dock wall, taking a horizontal plane on which the measuring datum line is positioned as a measuring datum plane, putting a total station on the dock wall to measure each linear docking block, and enabling a measuring sight line to cover the measuring points of all the linear docking blocks. The accuracy of measured data can be effectively ensured; and the method for measuring on the dock wall by using the total station is not influenced by the design height of the linear docking block, is suitable for various working conditions and is wide in application range.

The utility model relates to the technical field of magnetic couplers, and provides a device for measuring static torque of a magnetic coupler, which comprises a speed reducer unit, a measuring unit and a magnetic coupler unit. The speed reducer unit comprises a speed reducer and a coupler. The output end of the speed reducer is connected with the coupler; the measuring unit comprises a static torque sensor and a special digital display instrument; the static torque sensor is arranged at the end part of the coupler and is in signal connection with the special digital display instrument; the magnetic coupler unit comprises an outer magnetic driving assembly and an inner magnetic assembly. The outer magnetic driving assembly comprises a driving shaft, a bearing frame, a rolling bearing, a connecting body and an outer magnetic cylinder body. The inner magnetic assembly comprises an inner magnetic rotor, a pump shaft, a bearing body and a shell cover. According to the utility model, the measurement is convenient, the measurement efficiency is improved, and magnetic couplers of different specifications can be measured.

This invention relates to the field of engineering surveying technology and discloses an engineering surveying method to solve the technical problems of slow measurement speed and inaccurate measurement results in existing engineering surveying methods. The method includes: receiving satellite positioning signals from GNSS satellites based on a CORS reference station, and parsing the satellite signals to obtain first positioning data corresponding to the CORS reference station; receiving satellite positioning signals from GNSS satellites based on a CORS rover station, and calculating second positioning data corresponding to the CORS rover station based on the satellite positioning signals; when the server receives a measurement request sent by a user, performing differential calculation on the first and second positioning data to obtain the position coordinates of the CORS rover station; determining the position coordinates of each measurement point in the construction area based on the position coordinates of the CORS rover station, and calculating the engineering surveying result requested in the measurement request based on the position coordinates of each measurement point.

The invention relates to a method for localizing an emitter (F) in a sample (S), the method comprising illuminating the sample (S) with a stationary circular excitation beam (E), acquiring fluorescent photons; and estimating the position of the emitter (F) in the sample (S) from the acquired fluorescent photons. The invention also relates to a device (1) for localizing an emitter (F) in a sample (S), the device comprising an illumination means (10), an acquisition means (20) and a processing means (30), and to a computer program comprising instructions for causing the device (1) to perform the method for localizing an emitter (F).

The application discloses a method for determining a modulation signal of optimal modulation depth of a reflective all-fiber current sensor, and amplitude U of a modulation signal corresponding to the optimal modulation depth H is determined by adjusting amplitude of a modulation signal of a phase modulator PM When the peak-to-peak value of the light power received by the photodetector is maximum and the number of extreme points in one period is 3, the amplitude U of the modulation signal corresponding to the modulation depth H = π rad is obtained PMπ Thus, the electro-optic modulation coefficient k of the phase modulator is determined AP When the optimal modulation depth H o = 1.84 rad, the amplitude of the modulation signal corresponding to the optimal modulation depth is U PMo The method realizes online measurement of the half-wave voltage of the phase modulator, determines the modulation signal corresponding to the optimal modulation depth through the theoretically optimal modulation depth, does not introduce additional devices, and is simple and convenient to operate; and the application is not limited to the reflective all-fiber current sensor, and is suitable for any interference optical path structure which needs to measure the half-wave voltage.

The invention relates to the technical field of coaxiality evaluation, and discloses a system and method for evaluating the coaxiality of a cylindrical curved surface, and the system comprises a detection module which comprises a spring expansion sleeve, a central spindle which is coaxial with the spring expansion sleeve, and a dial indicator which is installed at the end part of the central spindle, and the spring expansion sleeve is installed in a first detected workpiece; a measuring head of the dial indicator is contacted with the side wall of the inner hole of the second measured workpiece; the evaluation module comprises a control unit and is used for controlling the detection module to carry out detection; the acquisition unit is used for acquiring detection data of the dial indicator; the processing unit is used for preprocessing the detection data, determining a deviation value of circumferential points on each circumference of the inner hole of the second detected workpiece, and determining the out-of-roundness of each circumference according to the deviation value; and the evaluation unit is used for determining the coaxiality of the first measured workpiece and the second measured workpiece according to the out-of-roundness of each circumference. Through automatic measurement and calculation, the accuracy and efficiency of coaxiality evaluation can be remarkably improved, and powerful support is provided for industrial production.

A tactile sensor (101, 102, 103, 104, 105, 2520), a touch event detection method, a sensing device (2500), and a robot (10), which relate to the field of sensor design. The tactile sensor (101, 102, 103, 104, 105, 2520) comprises a sensing unit (21), an elastic body supporting housing (22) and a base (23), wherein the sensing unit (21) is arranged in an inner cavity enclosed by the elastic body supporting housing (22) and the base (23); and the sensing unit (21) comprises at least two light sources (211), a photodetector (212) and a reflector (213), the photodetector (212) being arranged on the base (23), the at least two light sources (211) being arranged around the photodetector (212) on the base (23), and the reflector (213) being arranged at the top of the inner cavity of the elastic body supporting housing (22). By means of combining a plurality of light sources (211) and one photodetector (212), the number of photodetectors (212) used is reduced, so that the volume of the tactile sensor (101, 102, 103, 104, 105, 2520) is reduced.

The utility model discloses an optical liquid level meter, an optical liquid level detection device and a household appliance. The optical liquid level meter comprises a measuring device and a fixing device, the measuring device comprises a light source sealing assembly used for sealing a light source array; the detector sealing assembly is used for sealing the detector array; the detector array is used for receiving the preset optical signal emitted by the light source array and converting the preset optical signal into an electric signal; the fixing device is used for fixing the light source sealing assembly and the detector sealing assembly. According to the utility model, the light source and the detector are independently sealed, so that the liquid level meter is prevented from polluting the detected liquid, and the liquid level detection scene of more liquid can be compatible.

The utility model relates to the technical field of atmospheric science detection equipment, in particular to a CCN counter airflow control system with a high-precision flow regulation function, which comprises a high-precision flow regulation valve, a cloud condensation nucleus counter, an optical particle counter, an air storage bottle and an exhaust bottle. Compared with the prior art, the device has the advantages that the condensation nucleus counter, the optical particle counter and the high-precision flow regulating valve are arranged, so that the air inlet flow can be quickly changed, different supersaturation degrees can be generated, the measurement period is shortened, meanwhile, the advanced flow regulating technology and the flow stabilizing device are adopted, the stability and the uniformity of airflow are ensured, and the measurement accuracy is improved. The control device is electrically connected with the flow sensor and the temperature and pressure compensation module, so that the control system can quickly change the air inlet flow, the response time is shortened to the second level, and compared with a traditional method, the measurement speed is greatly increased, and the cloud condensation nucleus number concentration measurement is more accurate; and more reliable data support is provided for atmospheric scientific research.

The present invention relates to the technical field of differential pressure sensors, and in particular to an IO-Link differential pressure transmitter, comprising: a measuring module symmetrically provided with a plurality of liquid inlets and a measuring cavity provided inside the measuring module, wherein the measuring cavity is connected to the liquid inlet through a liquid guide port; a measuring assembly is provided inside the measuring cavity, wherein the measuring assembly comprises an isolation membrane, and an extrusion ring is provided on the side of the isolation membrane close to the liquid guide port, wherein the extrusion ring is connected to the isolation membrane and is clamped inside the liquid guide port; a sealing assembly is provided at one end of the liquid guide port close to the liquid inlet, wherein the sealing assembly comprises a sealing ring, a sealing plate and a sealing cover, wherein the sealing ring is provided at one end of the liquid guide port close to the liquid inlet, wherein the sealing plate is sealingly and slidingly provided inside the liquid guide port, and the sealing cover is an annular cover, wherein the two ends are fixedly connected to the sealing ring and the sealing plate respectively. The present invention reduces the impact wear on the isolation membrane during the introduction process, thereby improving the service life of the isolation membrane.

The application discloses a kind of multi-stage coarse high-precision novel translational rotary platform photoelectric encoding measurement methods.The application relates to engineering surveying technology, precision machining and other fields, solve the problem that the measurement accuracy of existing photoelectric translational rotary encoder needs to be improved.Cameras are fixed on rotating or translating devices, and the encoding device of the encoder is fixed on a stationary frame.The encoding device of the encoder is composed of uniformly distributed encoding arrays and fine measurement spots.During the rotation or translation of the motion device, the camera captures the encoding array image and fine measurement spot image of the encoder.According to the encoding array image, the coarse-precision absolute position measurement value of the rotation angle is identified.According to the number of displacement pixels in the fine measurement spot image, the coarse-precision absolute position measurement value is subdivided to one-tenth of the total number of column pixels of the camera for measurement accuracy.According to the barycentric algorithm, the high-precision measurement value of the rotation angle or translation amount is calculated, which can significantly improve the photoelectric encoding measurement accuracy.