1403results about How to "High measurement accuracy" patented technology

The invention discloses a tracking processing method for a baseband signal of a receiver, which comprises the following steps of: firstly, performing frequency correction through a frequency-locked loop, and performing phase correction through a phase-locked loop to realize accurate synchronization of carrier frequency and phase; then bit synchronization processing and incoherent integration are carried out, and the output signal-to-noise ratio of the loop and the measurement precision of the code phase are improved; and finally, the local pseudo-random code generator generates a local pseudo-random code, then the local pseudo-random code generator outputs three paths of pseudo-random codes which are mutually delayed by half a chip, namely a lead code, a real-time code and a lagging code, correlation values of the three paths of pseudo-random codes are obtained, a code phase error is obtained by calculating the correlation value difference of the lead code and the lagging code, and the local pseudo-random code is obtained. And after the code phase error is processed by a loop filter, an adjustment amount of a digital control oscillator is generated, so that the phase of the local pseudo-random code is adjusted. According to the invention, continuous adjustment of the digital control oscillator of the local carrier and the pseudo-random code is realized, so that correct navigation data information is demodulated for positioning calculation.

The invention discloses a real-time laser coal checking system and method, and relates to the technical field of material management and inventory checking, and the system comprises the following components: a laser detection module, a data processing module, a communication module, a monitoring module and a server module. The laser detection module is adopted to perform high-frequency scanning on the coal pile to obtain the three-dimensional point cloud data of the coal pile, the crown block displacement data measured by the laser range finder and the material and density information of the material pile are combined, the volume and weight of the coal pile are calculated through an algorithm, the outer contour of the coal pile can be determined more accurately, and the accuracy of the coal pile is improved. According to the shape characteristics and the density distribution condition of the coal pile, the coal pile is divided into a plurality of small geometries for volume calculation, and compared with traditional manual measurement or simple geometric shape approximation, the method has the advantages that the measurement precision of the volume and the weight of the coal pile can be remarkably improved; and more accurate data support is provided for material management and inventory checking of enterprises.

The invention discloses an AWG chip automatic test system based on a photodiode array, and the system comprises a light source transmitting module which is used for transmitting laser and finally coupling the laser to an input waveguide of an AWG chip; the six-axis control platform controls the single-mode optical fiber FA to be accurately coupled to the AWG chip by adjusting the position of the single-mode optical fiber FA; the light source detection module comprises a PD array composed of a plurality of photodiodes, and the PD array obtains information of an output waveguide of the AWG chip; data acquired by the upper computer and the data acquisition system are transmitted to the upper computer to be processed and displayed, and by taking a CWDM chip as an example, insertion loss, central wavelength, bandwidth, crosstalk and the like of the chip can be calculated by respectively acquiring optical power of four channels in the chip, so that whether the chip reaches the standard or not is judged. In the process, as the AWG chip is a passive device, input and output waveguides at the two ends of the chip carry out optical transmission in an alignment mode, and if alignment is wrong, large loss is likely to be generated.

The invention provides a vegetation surface biomass inversion method and device, electronic equipment and a storage medium. According to the invention, forest vegetation surface biomass field investigation is carried out by using data scanned by a knapsack laser radar and data measured manually, and actual measurement information of vegetation surface biomass in a sample plot, high-resolution panoramic image data in a sample plot range and high-precision knapsack three-dimensional laser radar point cloud data are obtained; scanning the sample plot by using an airborne laser radar, and extracting point cloud features capable of reflecting vegetation growth conditions from scanning data; then, the point cloud features serve as independent variables, total biomass obtained by processing data scanned by the backpack laser radar and actual measurement information serves as dependent variables, a biomass regression model is constructed, and the forest vegetation surface biomass is estimated through the model.

The invention discloses a bolt pre-tightening force testing method based on an electromagnetic ultrasonic pre-tightening force measuring system, and the method comprises the steps: collecting the waveform data of transverse and longitudinal waves generated by an electromagnetic ultrasonic probe, and only processing the current frame echo data and historical accumulated data each time through a data averaging algorithm. The storage space only needs to store the historical accumulated data received by the electromagnetic ultrasonic probe once, so that the processing speed and the signal-to-noise ratio of the data are improved; and automatically identifying and calculating the wave peak sound time enveloped by the transverse and longitudinal wave echoes of the bolt through a peak value algorithm, fitting to obtain a calibration curve corresponding to the bolt of the model specification through the ratio of the transverse and longitudinal wave sound time to the bolt pre-tightening force corresponding to the time period, and measuring the pre-tightening force of other bolts of the same model specification by using the calibration curve. The method is easy and convenient to operate, effective transverse waves and longitudinal waves can be excited at the same time, and measurement precision and accuracy are high.

The invention belongs to the technical field of sewage pipeline flow detection, and particularly relates to a sewage pipeline flow calculation method based on electromagnetic induction, which comprises the following steps: step 1, a detection mechanism is arranged between two butt-joint flowing sewage pipelines, and the detection mechanism is composed of a measuring pipe, an electrode and an excitation coil, the magnet exciting coil wraps the outer arc surface of the measuring tube. The sewage pipeline flow calculation method based on electromagnetic induction is high in measurement precision and suitable for various conductive media including sewage, corrosive liquid and a mixture containing solid particles; the measuring range is wide, and the device is suitable for measuring fluids with different pipe diameters and flow ranges. The electromagnetic flowmeter can be quickly mounted on the sewage pipe through the quick clamping mechanism, so that the mounting time is shortened, the labor intensity is reduced, and maintenance and calibration are facilitated; measurement errors caused by fluid interference are avoided by reducing accumulation of sediments, and the accuracy of circulation measurement is further enhanced by circular motion measurement of the electrodes.

The present invention relates to a posture measurement system and method, and specifically to an environment-adaptive array target posture measurement system and method, which solves the technical problems that the existing array target posture measurement methods have low measurement accuracy and are difficult to achieve simultaneous and high-precision measurement of array targets. The present invention measures the posture of array targets based on laser and photogrammetry, uses a laser with known spatial posture information and a flat target to form a plurality of non-collinear laser spot centroids, obtains characteristic information of the flat target through a camera, and then performs geometric correction on the two-dimensional position information of the laser spot centroid on the flat target, and then calculates the deflection amount in the laser transmission process according to the environmental parameters on the laser light path, performs position compensation on the two-dimensional position information of the laser spot centroid, and then couples the spatial posture information of the laser beam, thereby obtaining the posture information of each flat target, and then solving the overall posture of the array target, and achieving simultaneous and high-precision measurement of the array target posture.

The invention discloses an all-in-one eyeball comprehensive parameter measuring instrument and a method for measuring eyeball parameters by using the same. The measuring instrument comprises a signal light source, a signal light source sample arm, a signal light source reference arm, a scale light source, a scale light source sample arm, a scale light source reference arm, an annular light source, a telecentric lens, a zoom lens group and the like, the instrument can measure biological parameter information of human eyes, corneal curvature and eyeball diopter at the same time. The device is scientific and reasonable in design, and has the advantage that the curvature, the diopter and the biological parameters of the human eyes can be simultaneously measured at one time under the non-contact and non-invasive conditions.

The invention discloses a correction method and device based on a structured light shot image. The method comprises the following steps: acquiring image point cloud data and two-dimensional image data through a structured light device; performing denoising processing on the point cloud data; fitting a plane by using all or part of the point cloud data to obtain a plane equation; respectively calculating included angles alpha and beta between the point cloud plane and the X axis and the Y axis of the coordinate system through a plane equation; selecting four coordinate points which are not on the same line on the two-dimensional image, and calculating four coordinate points which are mapped to the horizontal direction according to the included angles alpha and beta; according to the one-to-one correspondence relation between the coordinate points, the perspective matrix of the image is calculated, the two-dimensional image is transformed according to the perspective matrix, correction of the two-dimensional image is achieved, accurate data can be measured, and high-precision repeatability of workpiece measurement is guaranteed.

The invention discloses a multiphase metering modeling system and a multiphase metering method for oil well produced substances. An oil well multiphase medium extraction simulation device of the system is used for measuring throttling pressure difference signals and temperature drop amplitude before and after a gas phase and a liquid phase of different flow combinations are mixed and pass through a selected oil nozzle, and an experimental data set is obtained; the metering model building module is used for building an oil well multiphase produced medium metering model based on the experimental data set, and a gas phase mass content calculation model is used for representing the relation among the fluctuation standard deviation of the throttling pressure difference before and after the oil nozzle, the temperature drop amplitude and the gas phase mass content; the total mass flow calculation model is a linear function relation between the ratio of the arithmetic square root of the average value of the throttling pressure difference before and after the oil nozzle device to the total mass flow and the gas phase mass content. The model established by using the system can accurately and conveniently meter the oil well multiphase produced medium, is wide in application range, and is still suitable for complex working conditions such as high gas-liquid ratio; and the ground technological process is simple, and the metering cost is low.

The invention discloses a method for measuring the toughness of a high-speed railway transportation network, and relates to the technical field of railway transportation networks. Comprising the following steps: respectively establishing a high-speed railway tense service network in a normal state and a high-speed railway tense service network under interference, and determining the instantaneous performance of the high-speed railway transportation network in the normal state and the instantaneous performance of the high-speed railway transportation network in the interference state; and determining the optimal network toughness of the high-speed railway transportation network according to the instantaneous performance in the normal state and the instantaneous performance in the interference state. According to the method, the instantaneous performance is measured and calculated on the smaller time granularity, the change rule of the instantaneous performance along with time can be effectively observed, the measurement and calculation precision of the network toughness is improved, and the method has more guiding significance for formulating a recovery strategy.

The invention relates to a method and device for measuring pitch deviation based on a line laser sensor, and the method comprises the following steps: S1, calibrating the position of the line laser sensor, and obtaining the coordinate value of a coordinate system of the line laser sensor in a measurement coordinate system; s2, installing a tested gear; s3, adjusting the relative position of the line laser sensor and the measured gear; selecting a measured position in the tooth surface area of the gear teeth of the measured gear, adjusting the position of the line laser sensor, and recording the sum of the offset of the adjusted line laser sensor relative to the center of the measured gear along the x axis and the y axis in the effective measurement range of the line laser sensor at the measured position; s4, performing zero returning operation on the angle sensor of the rotating shaft of the tested gear; and S5, controlling the detected gear to rotate along the center line of the detected gear. According to the method and the device, the pitch deviation can be measured in a non-contact mode, excessive calibration and leveling are not needed before detection, and the measurement efficiency and the measurement precision are both improved.

The invention provides a method for measuring acoustic impedance of a material surface in situ by using an embedded microphone array. The method comprises the following steps: arranging a rectangular microphone array on the surface of a material to be measured; the microphones are divided into two groups; setting a sound wave incidence angle, arranging a sound source in a half space on one side of the surface of the material based on the sound wave incidence angle, and collecting sound pressure through two groups of microphones; respectively describing a sound source radiation sound field and a boundary reflection sound field by using two groups of spherical wave primary functions; on the basis of the two groups of spherical wave primary functions, a mass point vibration velocity component in a unit normal vector direction is obtained, and the mass point normal vibration velocity at the first group of microphones is reconstructed by using sound pressure distribution collected by the two groups of microphones; and based on the material surface sound pressure and the mass point normal vibration velocity collected by the first group of microphones, calculating the acoustic impedance rate at the first group of microphones, and averaging to obtain the surface acoustic impedance rate of the to-be-measured material. Influence of sound scattering of components on a sound field is avoided, and sound pressure measurement precision is improved.

The invention relates to the technical field of air flow meters, and particularly discloses an integrated intelligent air flow meter which performs air detection on the basis of the ultrasonic principle, a pair of ultrasonic transducers is arranged in a sewage deodorization pipeline, and the ultrasonic wave propagation speed is adjusted according to the influence of air flow on the ultrasonic wave propagation speed. And the air flow is preliminarily calculated in combination with pipeline parameters. And then, in order to correct the influence of the temperature change on the ultrasonic propagation speed, the integrated intelligent air flow meter further performs real-time monitoring and data analysis on the temperature in the pipeline, and performs compensation correction on the preliminarily calculated air flow based on a time sequence change mode of the temperature, so that more accurate air flow measurement is realized. In this way, measurement errors caused by temperature fluctuation can be effectively reduced, and the measurement precision and stability of the air flow are improved.

The utility model discloses a clearance measurement vernier feeler gauge which comprises a base body and a gauge body arranged on the base body, the gauge body is in a wedge shape, a vernier sliding block is arranged on the inclined face of the gauge body, a distance measuring module and a display module are arranged on the base body, the distance measuring module is arranged at the tail end of the inclined face of the gauge body and right faces the vernier sliding block, and the display module is arranged on the base body. And the display module is used for displaying the measurement result. The method has the advantages that the gap width is conveniently and rapidly detected, and the detection efficiency is improved. The utility model further provides a gap measuring device which comprises the two gap measuring vernier feeler gauges and the connecting piece, and the bottoms of the two gap measuring vernier feeler gauges are connected with each other.

The invention discloses a linearity optimization test method for a semiconductor gas sensor, which belongs to the technical field of gas detection, and specifically comprises the following steps: acquiring a working temperature interval [A, B] when the linearity of the sensor is greater than a set standard, and setting a plurality of test temperatures in a test environment to collect the internal temperature of the sensor in real time, for each test temperature, if the test temperature is smaller than A, the adjustable voltage output circuit is controlled to heat the sensor; if yes, the adjustable voltage output circuit is controlled to cool the sensor. Drawing a time-varying curve of the internal temperature of the sensor at any test temperature, and calculating the temperature variation speed corresponding to the test temperature; then calculating a corresponding balanced working voltage according to the temperature change speed, and taking the balanced working voltage as a working voltage of the adjustable voltage output circuit at the test temperature; according to the invention, targeted optimization of the gas sensor in different scenes is realized.

The invention relates to a long-gap discharge leader development speed measurement method based on radiated electromagnetic wave detection. The method comprises a set of high-frequency antennas and a high-speed oscilloscope and a long-gap discharge leader development speed calculating method. The method adopts a certain antenna arrangement form; long-gap discharge radiated electromagnetic wave pulse time is detected simultaneously through the plurality of antennas; leader head position is positioned according to time difference of a signal arriving at different antennas; and furthermore, the long-gap discharge leader development speed can be calculated. The method can effectively improve the measurement precision of the discharge leader development speed, and resolution reaches the level of 0.1 ns.

The invention discloses a zoom self-calibration method for the focal length of a coherent wind lidar telescope. The zoom self-calibration method comprises the following steps: (1) performing quick and continuous zoom on a lidar to acquire echoes; (2) carrying out normalization processing on the echo signal curve; (3) determining the distance corresponding to the maximum value of the normalized signal; (4) determining a real telescope focal length according to the signal maximum value position; (5) fitting to obtain a telescope zooming calibration curve; according to the invention, the relation curve between the focal length of the laser radar telescope and the displacement of the focusing mechanism can be rapidly calibrated, rapid setting and effective recording of the real focal length are ensured, and the measurement precision and stability of a laser radar system are improved.

The invention relates to the technical field of optical fiber sensing, in particular to an optical fiber sensor system, a sensing signal measuring method, computer equipment and a medium. The optical fiber coupler comprises at least two optical fiber interference arms which are arranged in parallel and is used for dividing an optical signal into at least two beams and enabling the beams to be propagated along different paths to generate interference; the polarization controller is arranged at the emergent end of the optical fiber coupler and is used for regulating and controlling the polarization state and the polarization direction of the emergent light; the voltage control module is arranged on at least one optical fiber interference arm and used for changing the phase of the optical fiber by applying voltage; the image sensor is used for collecting interference fringe images and converting the interference fringe images into electric signals; and the data processing device is used for carrying out peak searching calculation on the electric signal to obtain stripe movement information, and obtaining a corresponding sensing signal value according to the relationship between the stripe movement information and the sensing signal. The application range of the interferometer in the visible light wave band is expanded, and the measurement precision of the interferometer is improved.

The invention discloses an antenna far field test system and method based on weather radar base data, and relates to the technical field of weather radar test. The transmitting antenna is mounted on the first antenna turntable and rotates along azimuth, pitching and polarization axes; an antenna to be tested and a standard horn antenna are installed on a second antenna rotary table through a radar receiver, the aperture faces of the antenna to be tested and the standard horn antenna form an included angle of 180 degrees, mechanical axes are coaxial, and the antenna to be tested and the standard horn antenna rotate along azimuth and pitch axes. The data processing device is connected with the radar receiver. The testing process is simplified, and the equipment cost and the maintenance cost are remarkably reduced. The test time is shortened, and the test precision of gain, beam width, sidelobe level and the like of the to-be-tested antenna is improved. The whole system has wider adaptability in practical application and is not limited by specific climate conditions. The test process is accelerated, and errors caused by human factors are reduced. The method has the advantages of simplicity in operation, high automation degree, high adaptability and the like, and the measurement precision and the test efficiency of antenna performance parameters are remarkably improved.

The invention provides a thermal resistance measuring device and method. The thermal resistance measuring device comprises a current source, a main control module, a controllable load module and a current detection module. The current source is connected with a temperature-sensitive device of a chip to be tested, and the main control module and the controllable load module are both electrically connected with the chip to be tested. The current source supplies power to a temperature-sensitive device of a to-be-tested chip so as to acquire temperature rise information of the to-be-tested chip. The main control module is used for changing the equivalent resistance value of the controllable load module so as to change the temperature state of the chip to be tested; the current detection module is used for detecting the total current of the controllable load module and the chip to be detected; the main control module is also used for detecting the first voltage of the chip to be detected and the second voltage of the controllable load module; and according to the total current, the first voltage, the second voltage, the equivalent resistance value of the controllable load module and the temperature rise information of the to-be-tested chip, the thermal resistance of the to-be-tested chip is obtained. According to the invention, the cost can be obviously saved under the condition of ensuring the measurement accuracy.

The invention provides an automatic gain control method and circuit of an ultrasonic flow metering device, and aims to improve the accuracy and stability of flow metering. According to the method, the gain is automatically adjusted by measuring the pulse width of an echo signal and comparing the pulse width with an expected value. The circuit comprises a transmitting circuit, an ultrasonic transducer, a variable gain amplifier, a variable threshold comparator, a zero-crossing comparator, a flight time measuring unit, a pulse width measuring unit, a time-to-digital converter and a calculation and control unit. According to the scheme, independent gain configuration of uplink and downlink flight time and a fine gain adjustment strategy based on echo amplitude change can be realized. In addition, by setting the allowable maximum pulse width change value, whether the measurement error is within a reasonable range can be automatically judged, and re-measurement can be carried out when necessary. According to the integrated design scheme, the flexibility and the response speed of measurement are improved, the signal processing flow is optimized, and an innovative solution is provided for ultrasonic flow metering.

The invention relates to a weak current signal detection system and method based on a fluxgate, and the system comprises an excitation module, a range selection module, a power amplification module, a fluxgate magnetic core coil, a sampling resistor, a differential amplification module and a data processing module which are connected in sequence, the magnetic core current reaches saturation current; the range selection module is used for adjusting the gain of the power amplification module; the power amplification module is used for amplifying the excitation signal; the fluxgate magnetic core coil is used for sensing current to be measured; the sampling resistor is used for sampling saturation current of a magnetic core coil of the fluxgate; the differential amplification module is used for amplifying saturation current of a magnetic core coil of the fluxgate; and the data processing module performs time difference calculation on the amplified saturation current through resampling, and outputs a weak current detection result. Compared with the prior art, the hardware cost can be reduced while the measurement precision is improved.

The invention discloses a method and system for detecting petrochemical equipment defects, and the method comprises the steps: dividing to-be-evaluated petrochemical equipment into a plurality of detection regions, and obtaining defect point cloud data of each detection region through three-dimensional shape measurement; according to the defect point cloud data of each inspection area, utilizing a defect identification model to identify defects of each inspection area and obtain vertex features of each defect; according to the vertex features and the defect point cloud of each defect, defect evaluation features of each inspection area are calculated, and the defect evaluation features comprise a defect opening area coefficient, a defect depth coefficient and a defect metal loss coefficient; and according to the defect evaluation features of each inspection area, obtaining a defect risk coefficient for comprehensively representing the severity of the overall defect features of the petrochemical equipment to be evaluated. According to the invention, the defect detection precision and the automatic detection efficiency can be effectively improved.

The invention relates to an ultrasonic fluid metering precision improving method and related equipment, and the method comprises the steps: exciting a first ultrasonic transducer through an excitation wave sequence, enabling a second ultrasonic transducer to work, obtaining a received digital signal corresponding to the excitation wave sequence, and calculating the signal-to-noise ratio of the received digital signal; wherein the excitation wave sequence is a combination of a main wave and a self-damping wave, and the signal-to-noise ratio is a ratio of a peak-to-peak value of a receiving signal area to a peak-to-peak value of a noise area; judging whether the signal-to-noise ratio is greater than a signal-to-noise ratio threshold value or not, if not, adjusting the occupation time of the high and low levels of the self-damping waves, and executing the excitation work again according to the adjusted excitation wave sequence until the actual signal-to-noise ratio is greater than the signal-to-noise ratio threshold value; and determining the corresponding excitation wave sequence when the actual signal-to-noise ratio is greater than the signal-to-noise ratio threshold as a target excitation wave sequence, and exciting the ultrasonic transducer to work according to the target excitation wave sequence so as to execute metering operation. According to the method, the measurement precision is remarkably improved while the hardware cost is not increased.

The invention relates to the technical field of tensioning systems, in particular to a tensioning system oil pressure gauge measurement precision compensation method and device, and the method comprises the steps: building a simulation model of a jack based on the obtained product information and service environment temperature of the jack, and obtaining the steady-state temperature in the jack based on the simulation model; multiple groups of actual measurement data when the jack works are obtained, an oil pressure gauge measurement error compensation model is constructed based on the multiple groups of actual measurement data, and the actual measurement data comprise pressure input of the oil pressure gauge, pressure output of the oil pressure gauge and steady-state temperature in the jack; and performing temperature compensation on the reading of the oil pressure gauge based on the oil pressure gauge measurement error compensation model to obtain the pressure input of the oil pressure gauge when the jack works in real time. According to the invention, non-probing precision compensation of the oil pressure gauge of the tensioning system is realized, and the measurement precision of the oil pressure gauge of the tensioning system is effectively improved.

The invention discloses double-arm heavy-load robot teleoperation exoskeleton equipment with a limiting protection function. The robot comprises a fixed base and exoskeletons installed on the left side and the right side, the exoskeleton on each side is provided with eight active degrees of freedom, and the eight active degrees of freedom comprise shoulder joint three degrees of freedom, elbow joint one degree of freedom, wrist joint three degrees of freedom and tail end clamping jaw one degree of freedom. According to the human engineering size, four passive adjustment freedom degrees of the shoulder height, the shoulder width, the large arm length and the small arm length are increased so as to adapt to the body types of different operators. The device has the following obvious advantages that the joint limiting device is arranged, so that joints are prevented from being damaged due to over-limit movement, and the operation safety is effectively improved; a passive degree-of-freedom design is introduced, so that the fitting degree of the equipment and a human body joint natural movement track is improved; an operator can conveniently and directly observe the state of the slave end mechanical arm clamping jaw through the tail end clamping jaw, the hand enabling holding rod is provided with a multi-stage button, adjustment in multiple mapping modes is supported, and the precise control requirement of a complex two-arm rescue task is met.

The invention discloses a hollow-core optical fiber microstructure size dynamic nondestructive measurement and control system, which is characterized in that a spectral confocal detection module acquires spectral signals reflected by each interface of the cross section of a hollow-core optical fiber from the side surface of the hollow-core optical fiber by using a dispersion confocal principle in a hollow-core optical fiber drawing process, and converts the spectral signals into spectral data; the data analysis module outputs an axial peak value calculated value by using a neural network model according to the spectral data, and converts the axial peak value calculated value into the diameter of a nested glass tube in the nested structure unit; the regulation and control module outputs an airflow regulation instruction according to the difference between the diameter of the nested glass tube and a preset value; the airflow control module adjusts the size of airflow entering the hollow-core optical fiber according to the airflow adjusting instruction, and then the diameter of the nested glass tube is adjusted. According to the invention, the diameter of the nested structure unit in the hollow-core optical fiber can be accurately measured in the production process, and the technological parameters can be adjusted in time according to the product state.

The invention discloses a machine tool cutter space pose on-machine measurement device and a measurement method thereof, and the device comprises a calibration module which is installed at one side of a cutter handle of a cutter; a frequency-modulated continuous wave laser interference system and a galvanometer are installed on a vibration isolation workbench of the machine tool, light beams emitted by the frequency-modulated continuous wave laser interference system achieve conversion of a set angle through the galvanometer so as to cover the calibration module, and a space positioning algorithm is adopted to fit the plane where the target ball is located. And obtaining a deviation value between the mass center and the normal vector in two measurement results before and after machining, and taking the deviation value as the tool space pose error before and after machining of the machine tool, so that rapid and high-precision direct measurement of the tool space pose error is realized. The method has the advantages of being large in measurement range, high in measurement precision, simple in structure and low in cost, and the defect that in an existing method, the position and pose errors of the tool are indirectly calculated through an error model is overcome.

The utility model aims to provide the testing device based on the arm model heat flow, which is low in cost, can meet uv-level voltage testing requirements, can realize voltage testing of a plurality of channels, and can improve the testing efficiency. The device comprises an arm model, a heat flux sensor, a temperature sensor, an operational amplifier, an instrumentation amplifier, an analog-to-digital converter and a main control board, the heat flux sensor and the temperature sensor are both mounted on the surface of the arm model, the temperature sensor is mounted on the surface of a product, the temperature sensor is connected with the main control board, and the operational amplifier is connected with the main control board. The heat flux sensor is connected with the input end of the operational amplifier, the operational amplifier increases input impedance, the output end of the operational amplifier is connected with the input end of the instrument amplifier and amplifies and converts signals into differential analog signals, the output end of the instrument amplifier is connected with the 24-bit analog-to-digital converter, and the analog-to-digital converter is connected into an external upper computer through the main control board. The device is applied to the technical field of heat flux testing.