258results about How to "Improve measurement stability" patented technology

The invention discloses a weighing sensor test compensation method based on fuzzy recognition, and relates to the technical field of sensor test compensation, and the method comprises the following compensation steps: inputting an original reading of a weighing sensor into a calculation module, and outputting a final compensated reading by the calculation module. According to the invention, the influence of various environmental factors such as ground flatness, power supply stability, temperature, humidity, air pressure, altitude and the like on reading is comprehensively considered, preliminary compensation and comprehensive compensation based on position and time are realized, and the adaptability and measurement precision of the weighing sensor under different environmental conditions are remarkably improved; a vibration correction coefficient is introduced to effectively compensate the influence of vibration on reading, the direct influence of vibration strength is considered, the compensation strength is dynamically adjusted through a modulation factor, the compensation effect is more accurate and effective, automatic adjustment and optimization of compensation parameters can be achieved, and the method is suitable for large-scale popularization and application. Therefore, the weighing sensor can automatically adapt to a complex and changeable measurement environment.

The invention discloses a low-cost dual-drive self-calibration dust concentration on-line monitoring system and a monitoring method. According to the system, a dust concentration monitoring assembly comprises an oscillating balance dust continuous tester and a plurality of low-cost dust monitors; the coal mine information processing center is respectively connected with the oscillating balance dust continuous tester and the low-cost dust monitor; the visual client is connected with the central processor through a third communication module. The method comprises the following steps: carrying out on-line monitoring operation by utilizing multiple groups of dust concentration monitoring assemblies; performing self-calibration on dust concentration data of the low-cost dust monitor by using a physically-driven prediction model; performing secondary real-time calibration on the dust concentration data of the low-cost dust monitor by using a data-driven machine learning calibration model; and generating a mine whole area dust distribution cloud picture by using the mine whole area dust distribution cloud picture unit, and sending the mine whole area dust distribution cloud picture to the visual client for real-time display. According to the system and the method, high-precision monitoring of the dust concentration can be realized on the basis of greatly reducing the monitoring cost.

The invention discloses an impedance measurement method based on a KAN neural network and a continuous disturbance injection device, and relates to the technical field of power grid operation analysis, and the method comprises the following steps: S1, setting disturbance parameters in the continuous disturbance injection device, and accessing the continuous disturbance injection device; s2, continuously injecting disturbance signals, and acquiring response voltage and response current of a grid-connected point of the to-be-tested system; s3, calculating an impedance amplitude and a phase under the current disturbance frequency based on a frequency spectrum identification algorithm of a KAN neural network; s4, impedance calculation of the next frequency point is carried out until the total number of disturbance injection times is reached, and measurement of the impedance of the system to be measured is completed; and S5, displaying impedance calculation results under different frequencies in a visualized manner. By adopting the KAN neural network, the precision and stability of impedance measurement in the power system are remarkably improved, and the anti-noise performance and the non-linear signal processing capacity are enhanced.

The invention provides a laser interference measurement precision traceability system and method. The system comprises an atomic clock, a femtosecond optical frequency comb, a spectrum spreading and frequency doubling module, a beat frequency module and a traceability processing module. The repetition frequency of a spectrum output by a femtosecond optical frequency comb and the frequency reference of an atomic clock are locked, frequency beating is carried out on a femtosecond laser spectrum and an interference measurement light source through spectrum broadening, optical frequency doubling and frequency beating detection, and traceability comparison is carried out on an obtained frequency beating signal and laser interference measurement data. The measurement precision of the to-be-measured laser interferometer is traced to the atomic clock frequency reference, and the traceability of laser interference measurement data is realized. Compared with the prior art, the laser interference measurement precision traceability system measures the wavelength by using the atomic clock frequency reference, has higher precision and resolution, and can realize on-site traceability of laser interference measurement data precision. And through precision traceability, the precision and stability of laser interference measurement are also improved.

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 invention relates to a self-oscillation fluxgate sensor and a measuring system, and relates to the technical field of electrical variable measurement. The self-oscillation fluxgate sensor comprises a detection assembly used for being connected with a detected wire and used for sensing a detected electric signal on the detected wire; the measurement and control circuit is used for providing a control signal; the feedback filter circuit is connected with the measurement and control circuit and is used for filtering the control signal, outputting a reference signal and adjusting the output reference signal according to the reference signal and the filtered control signal; the driving excitation circuit is respectively connected with the detection assembly, the feedback filter circuit and the measurement and control circuit, and is used for carrying out self-oscillation according to the reference signal and the detected electric signal and generating excitation current; and the measurement and control circuit is also used for determining a measurement value of the measured electric signal according to the excitation current. The method can improve the measurement precision.

The invention relates to the technical field of data processing, in particular to a calibration system and calibration method for inertial measurement units, and the system comprises a setting module which firstly determines a plurality of key point locations of a test aircraft and arranges a plurality of inertial measurement units according to the key point locations. The data acquisition module acquires the real-time acceleration of the inertial measurement unit according to a preset frequency. The comparison module compares the real-time acceleration of each unit, determines a first acceleration range according to the result, further determines a first calibration parameter, or adjusts the frequency, and sends out a secondary judgment instruction. And after receiving the instruction, the route judgment module draws a real-time route map according to the real-time acceleration, compares the real-time route map with a preset route map to determine a second calibration parameter, and adjusts the first acceleration range or sends out three judgment instructions if necessary. And after receiving the instruction, the temperature judgment module collects a real-time temperature value, draws a curve and analyzes the curve, and determines a third calibration parameter. And the calibration module comprehensively applies the parameters to calibrate the inertial measurement unit. The measurement accuracy of the inertial measurement unit is improved.

The invention discloses a steel plate contour dimension measurement method based on a surface detection platform, and belongs to the technical field of machine vision detection, and the method comprises the steps: transforming the surface detection platform, installing a laser transmitter between every two adjacent cameras in the same group of cameras in the surface detection platform, a modified surface detection platform is obtained; wherein light spots projected to the measured steel plate by each laser generator can be simultaneously collected by the cameras on the two sides of the laser generator; a preset calibration plate is adopted to calibrate each camera in the modified surface detection platform; acquiring a surface image of the detected steel plate by using the calibrated group of cameras; and calculating the overall dimension of the measured steel plate based on the surface image of the measured steel plate. According to the invention, the overall dimension of the steel plate is measured, the cost can be effectively reduced, and higher measurement precision can be obtained by using the high-resolution image of the surface detection platform.

The invention provides a concentration analyzer automatic cleaning system for an explosion-proof area and a control method.The concentration analyzer automatic cleaning system comprises a brush cleaning unit, a high-pressure water cleaning unit, an ultrasonic cleaning unit, a cleaning pollution judging unit and a data interaction interface, and a brush assembly arranged in the brush cleaning unit is installed on one side of an optical window of a refractometer; a brush assembly is arranged in the window to ensure that the brush covers the surface of the window, a driving unit of the brush assembly performs data interaction with the data interaction interface, a plurality of parameters are built in the driving unit, the driving unit controls the movement speed and driving pressure of the brush in the brush assembly, and adjustment is performed by receiving a control instruction of the data interaction interface; a high-pressure pump, nozzles and a connecting pipeline are arranged in the high-pressure water cleaning unit, the nozzles are arranged around an optical window of the refractometer and connected with the high-pressure pump through the connecting pipeline, a control unit is arranged on the high-pressure pump, and water pump pressure parameters and time interval parameters are preset in the control unit.

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 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 an inter-beam time synchronization measurement device and method after high-power laser beam splitting. The device comprises a triple frequency simulation light source, a first photoelectric tube, a second photoelectric tube, a high-speed oscilloscope and a data processing module. The frequency tripling simulation light source provides frequency tripling light signals of all light paths to be measured, the first photoelectric tube receives the light signals to be measured and outputs electric signals to be measured, and the second photoelectric tube receives time reference light signals and outputs time reference electric signals. The high-speed oscilloscope receives the electric signal to be measured and the time reference electric signal and outputs waveform sequence data to the data processing module, and the module calculates the time interval delta t between the waveform sequence data. According to the method, triple frequency simulation light is divided into a plurality of laser beams through a beam splitting module, and each laser beam reaches a target spot through an independent terminal transmission module. A first photoelectric tube is arranged at a target spot to measure the arrival time of each laser beam, and a second photoelectric tube is arranged in a terminal transmission module of a certain split laser beam to serve as a time reference. A light beam to be measured is selected through the shading assembly, and the time interval between each laser pulse and the time reference pulse is calculated by using a cross-correlation analysis method. According to the invention, high-precision measurement of time synchronization between high-power laser beam splitting is realized, and main laser emission or additional devices are not needed.

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.

According to the out-of-focus holographic measurement method of the radio telescope based on planetary zooming, a planet is used as a source for out-of-focus observation, a beam pattern of an actually observed planet is obtained through deconvolution, a theoretical far-field model of the planet is established, and the theoretical far-field model of the planet is compared with the actually observed beam pattern to calculate a redundancy value. And continuously updating the coefficient of the Zernike polynomial by minimizing the redundancy value and iterating until the optimal phase model is determined, and determining the phase error on the aperture plane according to the phase model. According to the out-of-focus holographic measurement method, the planet is introduced to serve as a radio source, the measurement precision and stability are improved, the real-time measurement effect and the multi-frequency calibration capability are enhanced, the calibration accuracy and the overall performance of the Tianmar radio telescope are remarkably improved, many limitations of a traditional surface type measurement method are solved, and the measurement precision and the measurement stability are improved. For example, the measurement speed is slow, additional hardware equipment is needed, the influence of weather is large, and the application range is limited.

The utility model discloses a mechanical heeling meter, which relates to the technical field of inclination angle measuring devices and comprises a meter shell, an observation port arranged at the front end of the meter shell and a transmission mechanism, and the transmission mechanism comprises a driving wheel and a driven wheel which are arranged in the meter shell; the driving wheel is in transmission connection with the driven wheel; the transmission ratio of the driving wheel to the driven wheel is not less than 1; the pendulum driving assembly comprises a connecting piece and a hammer body; the hammer body is positioned on one radial side of the driving wheel; the hammer body is in transmission connection with the driving wheel through a connecting piece and can drive the driving wheel to rotate relative to the meter shell through the gravity distance effect. An indication assembly; the indicating assembly comprises a dial and a pointer matched with the dial to indicate the inclination angle. The dial and the pointer are arranged at the front part of the meter shell and correspond to the observation opening; the pointer is coaxially and fixedly installed on the driven wheel. The inclination angle measuring device can improve inclination angle measuring precision and has the advantages of being compact and small in structure and convenient to install.

The invention, which relates to the technical field of the sensor, discloses a temperature and pressure sensor comprising a detection housing, a temperature sensing unit, an annular ceramic capacitor, a signal processing unit and an electrical connection housing. Independent temperature and pressure detection channels are arranged in the detection shell to protect signals of the temperature sensing unit from being interfered by the annular ceramic capacitor, so that the stability of the temperature and pressure sensor is improved; the temperature sensing unit is connected with the signal processing unit through the axis through hole of the annular ceramic capacitor, wire winding is reduced, the assembling efficiency is improved, a disc-shaped assembly and redundant sealing rings are omitted, the overall structure of the temperature and pressure sensor is more compact, the height is reduced, the integration degree is further improved, automatic assembling and cost reduction are facilitated, and the temperature and pressure sensor is suitable for popularization and application. The problem that the structure of the temperature-pressure sensor is more complex due to the fact that the integration degree of the temperature and pressure sensing part of an existing temperature-pressure sensor is low is solved.

The invention discloses a mirror surface object detection method and system based on single-phase measurement deflection and tactile perception fusion, and the method comprises the steps: projecting a fringe pattern with a fixed phase shift to the surface of a mirror surface object through a Mono-PMD system, capturing the fringe deformation of a mirror surface region through a camera, and obtaining the relative height information of the surface; the touch sensor is introduced to directly measure the absolute height of a key point, and the ambiguity problem of the height and the gradient due to the fact that the Mono-PMD can only provide the relative height is solved; and then based on height data acquired by a touch sensor, combining the relative height of visual measurement with the absolute height of touch detection by using a polynomial fitting method, and finally realizing three-dimensional shape reconstruction of the whole mirror surface object. The method effectively solves the problem of ambiguity of height and gradient, and improves the precision and efficiency of three-dimensional reconstruction through polynomial fitting.

The invention provides a silicon piezoresistive pressure core measurement precision compensation method and device, electronic equipment and a storage medium, and the method comprises the steps: considering the influence of temperature and pressure on the measurement precision of a pressure core through a pre-calibrated precision compensation data table, and carrying out the precise compensation of a current measurement value, as the change of temperature and pressure is considered, the influence of environmental factors on the measurement result can be reduced, the pressure core body can keep higher measurement stability under different temperature and pressure conditions, and the measurement accuracy is improved through precision compensation. The pressure core compensation precision can be effectively improved under the condition that hardware is not replaced, compensation and correction of temperature drift factors such as temperature and nonlinearity of core pressure can be achieved, the calculation complexity of a master control single-chip microcomputer is reduced, the peripheral packaging cost of pressure core detection is reduced, and the detection precision of the pressure core is improved. Therefore, the accuracy and the stability of pressure detection of the silicon piezoresistive pressure sensor can be effectively improved, and the silicon piezoresistive pressure sensor has certain economic benefits in actual industrial production.

The invention discloses an intermediate double-gear axial correction value measuring device, a measuring method and a grouping matching method, and the measuring device comprises a bottom plate, and a first support device, a second support device, a helical gear positioning tooth, a straight gear positioning tooth, a gauge stand device and a contact indicating device which are disposed on the bottom plate. The first support device, the second support device, the bevel gear positioning tooth and the straight gear positioning tooth are respectively provided with a contact indicating device, and the first support device, the second support device, the bevel gear positioning tooth and the straight gear positioning tooth are completely attached to the matching face of the measured middle double gear to form a circuit loop. According to the invention, the measurement efficiency can be ensured, the measurement stability can be enhanced, the measurement difficulty is reduced, the measurement efficiency is improved, the measurement repeatability and consistency are improved, and the condition that the vibration value of the whole machine exceeds the standard or the meshing part is abnormally damaged or even scrapped due to poor meshing of gears caused by inaccurate measurement is effectively avoided.

The embodiment of the invention provides a handheld radar water flow velocimeter, and relates to the field of water flow detection. Comprising a radar gun body and a supporting handle, and an inclination sensor and a yaw corrector are arranged in the radar gun body; a display screen is arranged at one end of the radar gun body away from emission; the supporting handle is connected to the bottom of the end, close to the display screen, of the radar gun body, the supporting handle and the radar gun body are connected through a vertical connecting structure and a flexible connecting structure, the vertical connecting structure is located in the flexible connecting structure, and the vertical connecting structure is a detachable connecting structure; the bottom of the radar gun body is provided with an integrated track and a switching structure. The integrated track is provided with a vertical connecting track and an inclined connecting track. And the switching structure is detachably connected to the vertical connecting track or the inclined connecting track. According to the invention, automatic compensation can be carried out on the measurement angle, two use modes of hand holding and support can be realized, large-range angle adjustment during support measurement is realized, and the measurement precision is improved.

The invention relates to a tunnel magnetoresistive sensor temperature compensation method and device based on an alternating reference magnetic field, computer equipment, a storage medium and a computer program product. The method comprises the following steps: acquiring surrounding magnetic field information, an alternating current signal amplification coefficient, a reference alternating current, an alternating coil parameter and a current temperature error voltage of the tunnel magnetoresistive sensor; separating to-be-measured magnetic field information and reference magnetic field information from the surrounding magnetic field information according to the reference alternating current and the alternating coil parameters; and according to the reference magnetic field information, the to-be-measured magnetic field information, the AC signal amplification coefficient and the current temperature error voltage, adjusting the reference sensitivity of the tunnel magnetoresistive sensor to obtain temperature compensation information. By adopting the method, the sensitivity loss of the tunnel magnetoresistive sensor can be reduced.

The invention discloses a method and a system for calibrating a light measuring point of a full-automatic biochemical analyzer based on a cuvette delay strategy. The method comprises the following steps: configuring a cuvette to be detected; setting a plurality of different delay times for the same cuvette based on the cuvette delay strategy; obtaining the distance from the light measuring point of the current cuvette to the optical detection position during detection, and selecting optimized delay time according to a distance comparison result to carry out delay detection so as to obtain a stable AD value; in the testing process, each cuvette passes through an optical detection position, absorbance data currently read by each cuvette is used as a photometric point, a time point for reading the data of the photometric point after a current cuvette serial number optocoupler is triggered is used as a delay point, the jumping photometric point is identified, and different delay times are selected; the problem that the photometric point of the full-automatic biochemical analyzer jumps is solved by delay adjustment of the cuvette, so that the originally unstable photometric point can read stable data, and the detection result is more accurate and real.

The invention relates to the field of liquid on-line monitoring, and provides an electrochemical sensor for measuring conductivity and dielectric constant of liquid, comprising: a probe comprising a first electrode plate, a second electrode plate and a third electrode plate which are successively arranged; the measuring circuit comprises an RC circuit, an amplifying circuit, a comparison circuit and a NOT gate circuit, the NOT gate circuit is used for obtaining a fourth voltage u4, the duration time of a high level in the fourth voltage u4 is first time t1, the duration time of a low level in the fourth voltage u4 is second time t2, and the first time t1 is a second time t2; the first time t1 and the second time t2 are used for determining the conductivity and the dielectric constant. The dielectric property is determined through accurate time measurement, the measurement technology and high time / bandwidth are integrated together, and very high precision and repeatability are achieved. Wherein the accuracy of the conductivity can reach piezemens / meter (pS / m), and the accuracy of the dielectric constant can reach 0.0001.

The invention discloses a semiconductor measuring device and a semiconductor process system, and the semiconductor measuring device comprises a detection light path unit which is suitable for providing an incident light beam focused on the surface of a wafer to be measured; and the light splitting unit is suitable for splitting an emergent light beam excited by the incident light beam on the surface of the wafer to be detected into at least two measuring light paths, and the measuring light paths respectively enter different detection / measurement receiving ends so as to carry out defect detection, image focusing or / and film thickness measurement. The semiconductor measurement equipment provided by the invention can provide various detection / measurement functions, and is compact and simple in structure.

The invention relates to the technical field of nondestructive testing of constructional engineering, and discloses a laser measuring instrument for nondestructive testing of concrete cavities, which comprises a laser interference measuring assembly, a paraxial sound wave excitation assembly, coaxially arranged anti-interference equipment and a cooperative control processing system. The sound wave excitation assembly performs wide-area excitation on the concrete surface, and the laser interference measurement assembly receives returned light through a clean light path constructed by the anti-interference equipment. The cooperative control processing system establishes acousto-optic time-frequency association by using an adaptive control module, generates a phase compensation angle according to ranging data to eliminate phase lock loss caused by sound wave propagation delay, and monitors a spectral gradient to automatically trigger fixed-frequency locking to capture resonance response. And the signal analysis module uses the phase compensation correction signal, and outputs cavity features through dual data cleaning and thermodynamic diagram analysis. According to the invention, the problems of time-space synchronization and weak signal extraction of long-distance non-contact detection in a complex environment are effectively solved.

The invention discloses a spectrograph structure optimization method and device based on fluid model analysis and a spectrograph, belongs to the technical field of echelle grating spectrographs, and particularly relates to structure optimization of the echelle grating spectrographs. The problems that according to an existing echelle grating spectrometer structure optimization method, optimization is not conducted on the influence generated by internal inflation (argon), the influence of mechanical pressure, temperature and optical medium refractive index changes caused by inflation turbulence generated by inflation on a light path cannot be analyzed, and errors are generated are solved. The method comprises a step of determining a final optimal position of the gas inlet / outlet hole from alternative positions of the gas inlet / outlet hole in the Y direction of the side wall by adopting an optimal position selection method based on a uniformity judgment method of a light transmission medium. The spectrograph structure optimization method and device based on fluid model analysis and the spectrograph are suitable for carrying out structure optimization on an echelle grating spectrograph so as to detect a far ultraviolet spectrum.

The invention discloses a method and system for estimating the envelope size of an airborne A-E type planar antenna, and relates to the technical field of antenna measurement, and the method comprises the steps: obtaining a sample data set of the A-E type planar antenna; constructing and training an end-to-end deep learning model based on the A-E type planar antenna sample data set; a to-be-estimated A-E type planar antenna is placed on a multi-axis measurement platform, and geometric parameters of the A-E type planar antenna are collected through a three-dimensional scanner; applying a working frequency band signal to the A-E type planar antenna by adopting a spectrum analyzer, and measuring and recording corresponding electromagnetic wave parameters under the working frequency band; and inputting geometric parameters and electromagnetic wave parameters of the A-E type planar antenna to be estimated into the trained end-to-end deep learning model, and outputting an envelope size estimated value. According to the method, prediction results of a plurality of heterogeneous models are fused by adopting an integrated learning strategy, the prediction accuracy and robustness are improved, adaptive adjustment of model parameters is realized through laser ranging and error analysis, and it is ensured that the prediction precision always meets requirements.

The invention relates to a dual-temperature-compensation pressure sensor, and the sensor comprises a sensor body which comprises a pressure sensing element and a first temperature sensor, and the pressure sensing element is used for sensing the pressure P and outputting a voltage signal Up; the first temperature sensor is used for sensing the temperature T1 of a medium and outputting a voltage signal UT1. The second temperature sensor is used for sensing the temperature T2 of the surrounding environment and outputting a voltage signal UT2; and the compensation module adjusts and compensates the pressure value Up detected by the pressure sensing element by adopting a compensation algorithm according to the temperature change detected by the temperature sensor I and the temperature sensor II, and finally obtains a corrected pressure value P '. According to the invention, through the detected temperature change, the compensation module is adopted to adjust the pressure reading in real time, so that the influence of the temperature on the pressure measurement is eliminated or reduced, and the measurement precision and stability under different temperature conditions are improved.

The utility model relates to the technical field of gauge measurement, and discloses a high-precision measuring device for a high-speed rail track gauge, and the device comprises a gauging rule, one end of the gauging rule is fixedly connected with a fixed seat, and the other end of the gauging rule is slidably connected with a sliding seat; two groups of walking mechanisms are arranged below the fixed seat, a group of walking mechanisms is arranged below the sliding seat, and each walking mechanism is used for enabling the gauging rule to move on a rail; the traveling mechanism below the fixed seat is clamped on a rail through a clamping assembly, the clamping assembly comprises at least two clamping blocks, the position of at least one inner side clamping block can be adjusted to adapt to the rail and keep stable, a conductive block is arranged on the inner side of each clamping block, and the conductive blocks are connected with conductive heads. By arranging the clamping assembly, dynamic self-adaptive clamping of the rail is achieved, stable contact between the gauging rule and the rail in the measurement process is ensured, and the stability and accuracy of measurement are remarkably improved.

The invention relates to the technical field of laser quantum interference measurement, in particular to an angular vibration measurement device and method based on a compressed state light source, which can measure high-frequency angular vibration parameters, the measurement result is expected to break through the standard quantum limit, and the measurement precision is effectively improved. The high-frequency angular vibration measurement device based on the compressed state light source is provided by combining the continuous variable compressed state quantum light source with linear interference measurement, measurement of high-frequency angular vibration parameters is achieved, the measurement result is expected to break through the standard quantum limit, and effective improvement of the measurement precision is achieved. The problem that in the traditional interference measurement process, the measurement result cannot break through the standard quantum limit is solved, and therefore high-sensitivity measurement is achieved.