34results about How to "Solving Measurement Accuracy Issues" patented technology

The disclosed on-line detection coil for silicon steel magnetic performance comprises: from inside to outside, a frame with cavity matched size of product line, a measurement coil, the isolation layer, an excitation coil. This invention needs not special sample to reduce detection cost and improve real-time detection effect.

An embodiment of the invention discloses a laser radar anti-interference method, laser radar and a vehicle. The laser radar anti-interference method includes: monitoring whether ambient light intensity of a current environment is larger than a preset threshold or not; if yes, emitting at least two detection pulse laser beams by a first frequency; in received light, determining echo light beams, reflected by a target object, of the detection pulse laser beams, wherein the received light comprises the echo light beams, reflected by a target object, of the detection pulse laser beams, echo lightbeams, reflected by a target object, of ambient light and the ambient light. By the technical scheme in the embodiment, the problem that laser radar measurement accuracy is affected by the ambient light is solved, and the anti-interference performance of the laser radar is effectively improved.

The invention provides a vibration compensation platform of a laser displacement sensor. The vibration compensation platform comprises a laser measurement device, a signal processor and a compensationcalculation device; the laser measurement device comprises a laser displacement sensor, an acceleration sensor, an angular velocity sensor and a fixture; the signal processor comprises a data collection card and a signal amplifier; the data collection card is used for collecting output voltages of the laser displacement sensor, the acceleration sensor and the angular velocity sensor; and the compensation calculation device respectively calculates a displacement, a vibration displacement error and a vibration angle error according to the output voltages of the laser displacement sensor, the acceleration sensor and the angular velocity sensor collected by the data collection card, and substitutes the displacement, the vibration displacement error and the vibration angle error into a shape and position correction matrix to obtain a compensated measurement point position and displacement of the laser displacement sensor. The vibration compensation platform provided by the invention solves the problem that the existing laser displacement sensor is vulnerable to vibration to affect the measurement accuracy of a measured component.

The invention discloses a nuclear pulse signal high speed digital separation method. Data is collected in real time. When collected digital value is larger than a base line, pulse amplitude data start to be collected in real time, and pulse width measurement is started. Meanwhile, the trapezoidal algorithm is used for real-time formation treatment, and consecutive digital pulses are obtained. In the descending process of the pulse amplitude, if the collected digital value is increased by consecutive n points, overlapping peaks occur, and at the moment, the pulse width measurement is stopped, and the overlapping peaks are processed. n is an integer larger than one. The method can identify and process a part of information of the overlapping peaks in real time and achieves the purpose of maintaining good energy resolution ratio on a high radioaction occasion.

The invention discloses a multifunctional inclinometer and a method for judging the relative positions of adjacent well sleeves based on the inclinometer, and belongs to the technical field of designof the special inclinometer for oil drilling and borehole collision prevention. The multifunctional inclinometer integrates a fluxgate sensor into an existing gyro inclinometer for the first time; andthe method for judging the relative positions of the adjacent well sleeves based on the inclinometer mainly comprises the steps that magnetic disturbance of the adjacent well sleeves and the boreholecollision risk are identified quickly, and the relative positions of the adjacent well sleeves are inverted. According to the multifunctional inclinometer and the method for judging the relative positions of the adjacent well sleeves based on the inclinometer, a practical method of inverting the relative distance and the orientations of the adjacent well sleeves by utilizing the magnetic tool face angle provided by a gyro sensor and the magnetic field intensity and the magnetic field inclination angle measured by the fluxgate sensor in real time is provided for the first time, the difficult problems such as accurate measuring of a borehole trajectory, identification of wellbore collision risk and inverting of the relative positions of the adjacent well sleeves can be solved simultaneouslyat a magnetic disturbance well section of the adjacent well sleeves, detection equipment is not needed to be arranged additionally, and the multifunctional inclinometer is not limited by whether production or halt production of adjacent wells occurs or not, and the wellbore collision risk can be detected early and advantageously.

The invention discloses a signaling ring with forward and reverse Hall measurement for a water meter. The signaling ring with forward and reverse Hall measurement for the water meter comprises a shell. The shell is provided with a pipeline, a rotating shaft is installed in the shell, an impeller is installed on the rotating shaft, a magnetic ring is installed at the top of the rotating shaft, a magnet is installed on the magnetic ring, and Hall elements is installed at the position, located at one side of the magnetic ring, of the top of the shell. According to the signaling ring with forwardand reverse Hall measurement for the water meter, the conduction and disconnection of the Hall elements are determined by utilizing the polarity, so that the Gaussian value of the magnet is increased,and the reliability of the product is ensured; and the magnet is used, the structure is simple, and the direction of magnetic lines is changed along the circumferential movement, so that the Hall elements are turned on and off, and the two Hall elements are turned on simultaneously, so that the forward and reverse rotation of the water meter is identified, and the metering accuracy of the water meter is further solved.

The invention relates to a detection method of a laser absorption spectrum detection system capable of expanding a detection range in a wide temperature range. The detection method of the laser absorption spectrum detection system comprises a laser, an absorption cell, a photoelectric detector, a signal processing unit and a controller. A temperature sensor is arranged in the absorption cell. According to the invention, the problem that an absorption spectrum detection system cannot realize a relatively large detection range in a high-sensitivity demodulation algorithm can be solved; the self-calibration of the detection system is realized by combining the characteristics of the two demodulation algorithms; the problem that self-calibration cannot be achieved in a special gas or environment is solved, meanwhile, the problem that the measurement accuracy of the sensor is low when the temperature change amplitude is large is solved, the requirement for practical application of the concentration sensor in an industrial field is met, and the method has important significance in improving wide application of the laser absorption spectrum technology in the field of gas detection.

The invention discloses a fine-grained network flow calculation method and device, and a storage medium. The method comprises the steps of obtaining end-to-end network flow; sampling the network flowto obtain discrete network flow; decomposing the discrete network flow according to an empirical mode decomposition algorithm, and calculating to obtain decomposed network flow; and recovering the decomposed network traffic according to a cubic interpolation algorithm, and calculating to obtain fine-grained network traffic. The invention studies how to estimate and recover an end-to-end network flow matrix with a fine-grained size in sampled flow tracking. According to the calculation method, the fine-grained network flow can be reconstructed by utilizing an EMD method and cubic interpolation.According to the fine-grained network flow calculation method provided by the embodiment of the invention, the accurate end-to-end network flow can be calculated, and the technical problem that the accurate measurement and analysis of the network flow cannot be realized in the prior art is solved.

The photoelectric-mode temperature monitoring equipment combines the optical technology with the method of the traditional temperature measuring,its configuration simple and cost cheap.This equipmenthas a light path component fastened on a temperature-sensing component that is composed of two kinds of materials whose thermal-espansion coefficient are different,and the ilght path component can bethe combination of either the beam emitter which composes the perpendicular incidence light path and the beam receiver with the reflector,or the beam emitter which composes the reflecting light path and the beam receiver with the reflector.Abeam emitted from the emitter irradiates the beam receiver and is received by it,or the beam irradiates the reflector and is reflected intl the receiver,then hte beam is received by the receiver which is linked with the processing device by the receiver outputting light signals.

The invention discloses an LNG (Liquefied Natural Gas) dispenser which comprises a liquid addition pipeline and a gas and liquid return pipeline, wherein a liquid inlet is formed in one side of the liquid addition pipeline, and is connected with a first check valve; the first check valve is connected with a liquid phase mass flow meter; the liquid phase mass flow meter is connected with a first pneumatic valve; the first pneumatic valve is connected with a breakaway valve. According to the LNG dispenser, a fourth check valve is additionally arranged on a connecting pipeline of the liquid addition pipeline and the gas and liquid return pipeline on the basis of a conventional process, a check valve originally arranged at a gas and liquid return port is eliminated, and meanwhile, a structural layout is zoned and optimized to shorten the distance between the mass flow meter and the valve, so that a pre-cooling process of the liquid addition pipeline can be faster implemented before the gas adding of the dispenser, and time for the whole gas adding process is further shortened.

The invention discloses an automatic wharf material metering method. A material weighing system meters a first weighing hopper and the first-time tare of the first weighing hopper; if a first weighing device begins distributing materials, after the first weighing device finishes distributing the materials, the rough weight and the tare of the first weighing hopper are automatically metered; the tare of the first weighing hopper this time is subtracted from the rough weight of the first weighing hopper this time to obtain the net weight of the materials in the first weighing hopper this time; after metering of the first weighing device is finished, the rough weight and the tare of a second weighing hopper are metered, the two steps are alternated repeatedly in this way, and the net weight of the materials in the first weighing hopper and the materials in the second weighing hopper are accumulated each time to obtain the net weight sum; according to the material weighing system, the first-time tare of the first weighing hopper and the first-time tare of the second weighing hopper are subtracted from the sum of the net weight sum of the materials in the first weighing hopper and the materials in the second weighing hopper and the last-time tare of the first weighing hopper and the last-time tare of the second weighing hopper to obtain the total weight of the materials in a ship. According to the automatic wharf material metering method, the metering accuracy of wharf metering is improved, and the work intensity of metering personnel is greatly relieved.

The invention provides an optical measurement system and method for an included angle between an optical axis of an off-axis aspheric mirror and a mounting surface. The optical measurement system comprises an interferometer, a parallel optical flat, a compensator and an off-axis aspheric component; the interferometer provides a light source and detects an aspheric surface shape error; light beams emitted by the interferometer sequentially penetrate through the parallel optical flat and the compensator to reach the off-axis aspheric component to be reflected; light rays reflected by the off-axis aspheric component sequentially penetrate through the compensator and the parallel optical flat to enter a detector in the interferometer; the light rays entering the interferometer interfere with reference light in the interferometer, so that interference fringes are formed, and the surface shape error of the aspheric surface is calculated. According to the system and method of the invention, the included angle between the optical axis of the off-axis aspheric mirror and the mounting surface of a supporting structure can be measured and calculated quickly, losslessly and accurately. According to the system and method, existing precise instrument equipment and optical elements are utilized, the optical mirror surface is not damaged, the detection precision is high, the consumed time is short, and a rapid and high-precision nondestructive detection technology can be realized.

The invention discloses an automatic testing method for the pH value of the methylamine nitrate manufacturing procedure. A pH value online testing device is arranged on a neutralization tank and provided with an automatic washing device, when a reaction is close to the terminal point, the pH value online testing device is started, and automatic testing of the pH value is completed through the pH value online testing device; washing of an online pH meter in the pH value online testing device is completed through the automatic washing device after the reaction is over, residual methylamine nitrate is washed down simultaneously, and the safety is guaranteed. According to the automatic testing method for the pH value of the methylamine nitrate manufacturing procedure, manual operation can be simulated, when the reaction is close to the terminal point, the pH value automatic testing device is started, and damage of the strong acid environment is effectively avoided; meanwhile, a through hole is formed in the end, far away from a clamping device, of a protecting bush, and the problem that due to the fact that a probe of the online pH meter is exposed in the air, the measuring veracity and the service life are affected are effectively solved; the automatic washing device conducts automatic washing after the reaction is over, the residual methylamine nitrate is washed down simultaneously, and the safety is guaranteed.

The invention provides an experimental apparatus suitable for realizing an oxygen-controlled reaction, and the experimental apparatus is used for oxygen-controlled related experiments under the conditions of different temperatures and oxygen concentration measurement control in lead-bismuth. The device can be used for solving the problems of tight connection, disassembly and measuring accuracy of the device under a room-temperature solid lead-bismuth state and consists of a corrugated pipe, an oxygen measurement instrument, a thermocouple, a stirrer, a connecting piece, a sealing flange, an air inlet, an air outlet and a liquid outlet. According to the experimental apparatus, the corrugated pipe is adopted for connection and sealing, the ascending and descending of the stirrer and the oxygen measurement instrument are realized, and the problem that the reaction apparatus cannot be sealed under the room-temperature solid lead-bismuth state can be solved; simultaneously, the thermocouple and the oxygen measurement instrument are connected by virtue of the connecting piece, so that the synchronous ascending and descending of the thermocouple and the oxygen measurement instrument is realized, the temperature measurement of liquid lead-bismuth adjacent to the oxygen measurement instrument is realized, and the temperature corresponding to the signal of the oxygen measurement instrument is more accurate; A blade of the stirrer is in threaded connection with a metal connecting rod at the upper end, so that the disassembly is convenient, and simultaneously blades of different types can be replaced so as to realize different liquid lead-bismuth flow field flow field experiments; and the sealing flange is used for connecting and sealing the oxygen measurement instrument and the thermocouple, so that replacement is convenient. The design of the device is especially suitable for the oxygen-controlled experimental research on the liquid lead-bismuth with different temperature and flow velocity parameters.

The invention discloses an automatic wharf material metering method. A material weighing system meters a first weighing hopper and the first-time tare of the first weighing hopper; if a first weighing device begins distributing materials, after the first weighing device finishes distributing the materials, the rough weight and the tare of the first weighing hopper are automatically metered; the tare of the first weighing hopper this time is subtracted from the rough weight of the first weighing hopper this time to obtain the net weight of the materials in the first weighing hopper this time; after metering of the first weighing device is finished, the rough weight and the tare of a second weighing hopper are metered, the two steps are alternated repeatedly in this way, and the net weight of the materials in the first weighing hopper and the materials in the second weighing hopper are accumulated each time to obtain the net weight sum; according to the material weighing system, the first-time tare of the first weighing hopper and the first-time tare of the second weighing hopper are subtracted from the sum of the net weight sum of the materials in the first weighing hopper and the materials in the second weighing hopper and the last-time tare of the first weighing hopper and the last-time tare of the second weighing hopper to obtain the total weight of the materials in a ship. According to the automatic wharf material metering method, the metering accuracy of wharf metering is improved, and the work intensity of metering personnel is greatly relieved.

The invention discloses a standard pulse generator to analog user pulse metering list to connect data collector based on pulse gathering technique, which comprises the following parts: MCU, LCD screen, keyboard, I-to-O port expanding circuit, rapid light coupling relay to switch two output resistant signals, analog pulse happening circuit to provide resistant network of two output resistances to output analog pulse signal. The invention can send sampling period and non-source pulse signal with different duty cycles continuously and timely or quantitatively and analogs the short-cut of pulse metering list, which satisfies the testing need of national standard GB / T 20866-2007 'data collector based on user pulse metering list'. The invention can test the metering property under experiment oron-site environment for data collector effectively, which solves the metering accuracy to test the data collector.

The present invention provides a calibration treatment method of a turbidity sensor. A microprocessor in response to real-time sensing signal data controls and completes the determination operation of a calibration corresponding relation between a turbidity sensing signal value and a logged calibration liquid turbidity value in the calibration process. The method not only greatly reduces the workload of manual operation, but also avoids dependence on the artificially estimated timing standing time of the calibration process. The microprocessor controls and determines the calibration accuracy, ensures the corresponding relation of the turbidity sensing signal value of a turbidity sensor and the real turbidity value of the calibration liquid, effectively solves the problems that the calibration accuracy of the turbidity sensor in the prior art is susceptible to limit of artificial operation factor and that the measurement accuracy is affected. The calibration treatment method can write a piece of programme by computer programming technology and load the programme to the microprocessor of the turbidity sensor, so that the microprocessor realizes control of the calibration treatment. The method is applicable to industrial application and has good practical application value.

The invention discloses a hydropower station in-situ PLC control and measurement and control protection integrated cabinet which comprises a cabinet body, an alternating current and direct current dual-power supply device, an in-situ programmable logic controller, a touch screen, an in-situ control panel, an output relay module, a microcomputer protection device and a network component are mounted in the cabinet body and are sequentially arranged between a front guide rail and a rear guide rail of the cabinet body according to a high-low sequence, and the cabinet body is divided into 0 to 45U according to an assembling space from top to bottom. According to the invention, the in-situ monitoring and control operation of the unit is realized, the accurate measurement and display of the electrical quantity of the unit are realized, the in-situ control and protection measurement and control functions which can be completed by two sets of cabinets in the past are completed through one set of cabinet, the integration uniformity and reliability of the whole control system are greatly improved, and the design advancement of the whole control system is improved; and the investment of the cabinet and wiring is saved, and a simple and convenient overall solution is provided for on-site design and construction.

The invention discloses an optical-system focal-length measuring system and a method. The system includes a laser point illumination positioning module, a light splitter, a point detection and positioning module, a standard plane mirror and goniometer equipment. The laser point illumination positioning module emits a laser at a focus of a measured optical system; the laser passes through the beamsplitter to enter the measured optical system, and then forms parallel light to exit; the parallel light is reflected to the measured optical system through the standard plane mirror to form collimation light by convergence; the collimation light is reflected through the beam splitter to form a reflection self-collimation focus; the goniometer equipment measures an included angle of the standard plane mirror and an optical axis of the measured optical system; the detection and positioning module positions the reflection self-collimation focus; a position change [delta]y which is of the reflection self-collimation focus and corresponds to an included-angle change [delta]theta of the standard plane mirror and the optical axis of the measured optical system is measured; and focal length of the measured optical system is calculated and obtained according to image height and focal-length relationships. The measuring system is accurate in focus positioning, and is suitable for use in installation, adjustment and detection of large-caliber long-focal-length optical-lenses of spatial optical remote sensors.

The invention relates to a frequency response measuring method for leakage current and contact current. The method comprises the steps of performing hardware compensation on high-frequency analog signal attenuation through a frequency response measuring circuit; then capturing a high-frequency signal through a high-frequency capturing circuit; and finally performing software correction on the response signal through a CPU. According to the method, at aspects of hardware compensation and software correction, the frequency response testing method for the leakage current and the contact current is designed. When the frequency of a tested current signal is higher than 100kHz, hardware compensation and software correction are performed on signal attenuation, thereby satisfying a standard measurement requirement. The frequency response measuring method further improves capability and reliability for testing the leakage current and the contact current. An instrument using the method can be adapted to electric appliance product safety testing of more industries, thereby settling a problem of measurement accuracy for signals with higher frequencies for electric appliance production enterprises, and supplying better safety insurance for uses who purchase the electric appliance products.

The invention provides a method and device for testing hydrolyzable fluorides in sulfur hexafluoride gases. The method comprises the following steps: 1) sufficiently mixing an SF6 gas with a NaOH solution in a jet device; 2) feeding a gas-liquid mixed liquid into an absorption tank, performing gas-liquid circulation, feeding into the absorption tank through the jet device, and repeating the operation till a fluorinion electrode measurement value is stable, wherein the potential of a fluorinion electrode is V1 at the moment; 3) repeating steps 1) and 2) to another SF6 gas, wherein the potentialof the fluorinion electrode is V2 at the moment; 4) drawing a fluorinion working curve; 5) according to a standard working curve equation, testing the concentration of hydrolysable fluorides. According to the device, the input end of the jet device is communicated with a gas inlet pipeline and a liquid circulation pump respectively, the output end of the jet device is communicated with an absorption tank, the inlet of a six-way valve is connected with an injection pump, and the input end of the liquid circulation pump is communicated with the bottom of the absorption tank through an electromagnetic valve; after a buffer tank is serially connected with the gas circulation pump, a gas inlet and a gas outlet are correspondingly communicated with an exhaust pipeline and the gas inlet pipeline, and accurate testing and sufficient absorption upon the hydrolyzable fluorides are achieved.

The invention provides a sensitivity measuring device of a visible optical fiber spectrometer. The device is mainly formed by a narrow linewidth laser source, an optical fiber jumper, an adjustable optical attenuator and an optical power meter, problems of optical signal generation, transmission and attenuation control are effectively solved. Through precisely controlling the sensitivity measuringdevice to reach a sensitive state and through the comparison and measurement of a specific optical power meter under the same condition, a specific value of a sensitivity index is given, and problemsof sensitivity value searching and accurate measurement of the optical fiber spectrometer are solved effectively.

The invention relates to a device and a method for testing the interface slippage performance of a fiber composite material rod and a binder, and the device comprises an abutting plate which is clamped on the fiber composite material rod in a sleeving manner and abuts against a first end part of a sleeve; a fixing frame which is connected to the abutting plate, wherein the arrangement direction of the fixing frame is consistent with the arrangement direction of the sleeve, and a connecting end is formed at the position, close to the second end of the sleeve, of the fixing frame; a first clamping plate which is clamped and fixed at the first end part of the sleeve and is attached to the abutting plate; and a first displacement sensor which is parallel to the fiber composite material rod, wherein the detection end of the first displacement sensor penetrates through the abutting plate and is attached to the first clamping plate. According to the invention, the abutting plate is used for tightly abutting against the sleeve in the measuring process, it can be ensured that the displacement of the sleeve is zero, the influence of sliding of the sleeve on a test result is reduced, and the accuracy of the test result is improved. The measuring device is simple in structure, convenient to install and wide in application range.

The invention relates to a method and a device for measuring the three-dimensional attitude of a part in a floating liquid. The device is composed of three parts, namely a mechanical part, an image acquisition part and an image processing part. The mechanical part is composed of a glass oil tank, a supporting frame, an equipment mounting table, a constant-temperature oil tank and a constant-temperature oil tank controller thereof, a pitching deflection table, a two-dimensional sliding table, two one-dimensional sliding tables and a sliding table controller of the two-dimensional sliding tables. The image acquisition part is composed of a measured part, three lenses, three camera sensors, three annular light sources and a light source controller. The image processing part is composed of a computer and an image processing algorithm. The device disclosed by the invention has the advantages of non-contact measurement, high efficiency, high precision, automatic measurement and the like.

The invention provides a coupling system of a vacuum atomic force microscope and a vacuum atomic force microscope. The coupling system includes a vacuum chamber, an excitation light source arranged outside the vacuum chamber, a detection light source, a light transmission device, and a photoelectric position converter. The excitation light source emits excitation laser to vibrate a probe; the detection light source arranged outside the vacuum chamber is used for emitting detection laser to detect probe deflection information; a part of the light transmission device is arranged outside the vacuum chamber and the light transmission device can receive the excitation laser and the detection laser, and the light transmission device can also transmit the excitation laser and the detection laserreflected by the probe and deflect the excitation laser away; and the photoelectric position converter is used for receiving the detection laser and calculating the stress of the probe according to the detection laser. Reliable measurement in a vacuum environment is realized, the noise in the measurement process is reduced, and the measurement result is ensured to be accurate. Meanwhile, the structure is simple, and the complexity of a coupling system can be reduced.

The invention provides a laser displacement sensor vibration compensation platform, including a laser measuring device, a signal processor and a compensation calculation device; the laser measuring device includes a laser displacement sensor, an acceleration sensor, an angular velocity sensor and a fixture; the signal processor includes a data an acquisition card and a signal amplifier; the data acquisition card is used to acquire the output voltages of the laser displacement sensor, the acceleration sensor and the angular velocity sensor; The output voltages of the laser displacement sensor, the acceleration sensor and the angular velocity sensor are calculated to obtain displacement, vibration displacement error and vibration angle error, which are substituted into the shape-position correction matrix to obtain the position and displacement of the measurement point of the laser displacement sensor after compensation. The invention solves the problem that the existing laser displacement sensor is easily affected by vibration to measure the accuracy of the measured part.

The embodiments of the present invention disclose a method for anti-interference of a laser radar, a laser radar and a vehicle. The anti-jamming method for lidar includes: monitoring whether the light intensity of ambient light in the current environment is greater than a preset threshold; if so, transmitting at least two detection pulse lasers at a first frequency; determining in the received light that the detection pulse laser passes through the target object The reflected echo beam; wherein, the received light includes the echo beam reflected by the detection pulse laser by the target object, the echo beam reflected by the ambient light by the target object, and the ambient light. The technical solutions of the embodiments of the present invention solve the problem that ambient light affects the measurement accuracy of the laser radar, and effectively improve the anti-interference ability of the laser radar.

The invention discloses a carbon emission metering method, equipment and a carbon metering system. The method comprises the following steps: acquiring equipment positioning information of metering equipment; obtaining energy consumption activity data of at least one energy consumption device connected to the metering device; determining an emission factor query data packet according to the equipment positioning information and the energy consumption activity data, and obtaining equipment attribution information corresponding to the emission factor query data packet and a regional emission factor feedback data packet; and determining carbon emission metering data according to the energy consumption activity data and the regional emission factors. According to the invention, the metering equipment determines the equipment attribution information and the emission factors updated in real time in the area where the equipment is located according to the equipment positioning information and the received energy consumption activity data, so that the carbon emission accounting is completed in the distributed metering equipment without depending on fixed equipment types and position conditions, the data real-time performance is improved, and the energy consumption is reduced. Network burden caused by centralized data convergence is avoided, communication cost is saved, and system reliability is improved.

The invention discloses an exact multi-point real-time temperature measurement method and system for a permanent magnet synchronous motor, and belongs to the field of permanent magnet synchronous motors. The method and the system solve the problem that the measurement accuracy and the instantaneity are seriously influenced by strong electromagnetic interference when the internal temperature of the motor is measured by adopting a two-wire system nude temperature sensor. The method comprises the following steps: step 1, when the motor is not started, calibrating the measurement parameter of each temperature measurement point in sequence, acquiring actual offset b' and actual gain k' in a linear relation between input resistance signals and output voltage signals and lead resistance FORMULA at each measurement point, and acquiring a calibrated linear relation FORMULA between input resistance signals and output voltage signals; and step 2, starting the motor to work, acquiring, by a lower computer control unit, the output voltage signals of all measurement points in sequence according to the calibrated relation, digitally filtering, by an upper computer, the series of data to remove interference signals, and thus acquiring an exact temperature value of each measurement point on the motor.