135results about How to "Improve measurement reliability" patented technology

The invention discloses a lower limb movement gait recognition method and system based on feature fusion, and belongs to the technical field of gait recognition. Comprising the following steps: acquiring a surface electromyogram signal and a motion inertia signal of a to-be-predicted object; carrying out feature extraction on the surface electromyogram signal and the motion inertia signal by utilizing wavelet transform, obtaining gait features and screening an optimal feature combination; and processing the optimal feature combination through the trained gait recognition model to obtain a gait recognition result. Complex multi-modal data can be effectively processed and analyzed, so that high-precision gait recognition and evaluation are realized; the problem that the accuracy of gait evaluation needs to be improved due to the fact that single signal processing is difficult to comprehensively reflect a complex gait dynamic process in the prior art is solved.

The invention provides a photovoltaic cell film thickness real-time monitoring method and system, and relates to the technical field of photovoltaic cells, and the method comprises the steps: setting a multi-channel optical fiber sensor array, enabling a receiving end optical fiber to collect a reflected light signal of a film, and enabling the reflected light signal to be connected into a photoelectric detector, and converting the reflected light signal into a reflected light intensity signal; preprocessing the obtained reflected light intensity signal, estimating the phase difference between adjacent cycles by using a phase unwrapping algorithm to obtain continuous thin film thickness change information, introducing a refractive index online estimation mechanism to compensate the refractive index change of the thin film material, and counting the oscillation amplitude in each cycle to obtain the refractive index of the thin film material. The real-time thickness value of the thin film is obtained in combination with compensation on the change of the refractive index; the thin film thickness distribution of the surface of the whole substrate is obtained through an intelligent interpolation algorithm, a thin film three-dimensional thickness distribution diagram is generated based on the obtained thin film thickness distribution through the graph drawing and rendering technology, and the dynamic evolution of the thin film growth process is presented in real time.

The invention provides a transformer type differential signal acquisition system and method, and relates to the technical field of signal acquisition, and the system comprises a switching power supply module which is used for supplying power to the system; the input module is used for collecting wire feedback signals; the operational circuit is used for rectifying the feedback signal, performing differential processing and filtering on the rectified feedback signal to obtain a differential filtering signal, adding bias voltage to the differential filtering signal, and amplifying the differential filtering signal to obtain an amplified signal; the analog-to-digital conversion module is used for converting the amplified signal into a digital signal; the CPU processing module is used for processing the digital signal, generating a control signal and sending the control signal to the output module and the communication module; the output module is used for generating current according to the control signal; and the communication module is used for sending the control signal to an upper computer through the communication interface, so that the upper computer calibrates the linear variable differential transformer. The linear variable differential transformer has the technical effect that the measurement precision of the linear variable differential transformer is improved.

The invention discloses a preparation method and application of a dry self-adhesion flexible capacitive pressure sensor, and the method comprises the steps: dissolving a polymer through an organic solvent, and obtaining an electrostatic spinning precursor solution; performing same-pressure conjugate electrostatic spinning through the electrostatic spinning precursor solution to obtain a self-adhesion composite nanofiber membrane; a nanofiber membrane is obtained through electrostatic spinning; the obtained self-adhesion composite nanofiber membrane is used as a packaging layer, and the nanofiber membrane is used for preparing a flexible electrode in a mode of vacuum filtration of a carbon nanotube; and assembling the obtained packaging layer and the flexible electrode according to a capacitive structure, leading out a wire, positioning the assembled structure by using a hollow mask plate, and completing packaging through a hollow hot pressing technology. Through specific polymer selection and an electrostatic spinning technology, the prepared self-adhesion composite nanofiber membrane can be directly adhered to the skin or other complex surfaces, an additional adhesive is not needed, and the comfort level and the use convenience of a user are improved.

The invention relates to the field of encoder control methods, in particular to a control method of a pull rope displacement sensor, which comprises the following steps that: before control is started, an encoder automatically identifies environments and requirements through a built-in intelligent algorithm, and configures optimal parameters; during operation, the signals are subjected to dynamic enhancement and intelligent filtering optimization, and noise is eliminated; fusing internal and external data in real time, and predicting a motion trend by utilizing machine learning; the self-learning algorithm continuously optimizes coding correction and adapts to environmental changes; a coding instruction is intelligently generated and verified based on data prediction; and according to real-time feedback, a control strategy is dynamically adjusted, self-adaptive optimization is realized, and changing working environments and task requirements are adapted.

The invention discloses a digital output current measurement method and system based on a TMR array, and the method comprises the steps: obtaining a secondary analog voltage signal which is output by a TMR rectangular array at a t moment and is in direct proportion to a primary measured current signal, and carrying out the low-pass filtering and high-pass filtering, thereby obtaining a low-frequency voltage signal and a high-frequency voltage signal; under the triggering of a sampling clock, after analog-to-digital conversion and Fourier transform are carried out on the low-frequency voltage signal and the high-frequency voltage signal, a power-frequency current signal and a high-frequency current signal measured by a TMR current sensor are obtained, and delay error sampling time caused by desynchrony between an analog-to-digital conversion sampling clock signal and a trigger signal is analyzed; acquiring the microprocessing time of the microprocessor for the low-frequency discrete voltage signal and the high-frequency discrete voltage signal; and performing correction according to a phase error caused by the delay error sampling time and the micro-processing time, and encoding the corrected measurement data to obtain a corresponding digital output current.

The invention relates to the technical field of automobile manufacturing, discloses a measuring gauge for the ablation edge angle and the profile tolerance of a door ring single plate, and solves the problems that an existing measuring gauge for the ablation edge angle and the profile tolerance of the door ring single plate can only perform single-dimension linear measurement, time and labor are wasted due to multi-step operation, and efficiency is low. The device comprises a frame, a workbench arranged at the top end of the frame and a dial indicator movably connected to one side of the workbench, the dial indicator is stably fixed through driving of a three-clamp structure, a driving structure, a moving assembly and a fixed-point measurement structure, the measurement accuracy and reliability are improved, meanwhile, a camera can record data in real time, three-face clamping is conducted on a single plate, and the measurement accuracy and reliability are improved. The device is simple in structure and convenient to operate, ensures that the device is fixed in position in the measurement process, can perform multi-path and fixed-point equidistant measurement on the measurement surface of the single board, improves the measurement integrity and accuracy, facilitates the evaluation of the quality of the single board, can achieve comprehensive and efficient continuous measurement through the cooperation of a short rack and a second gear, and is suitable for large-scale production measurement.

The invention discloses an optical fiber sensing precision enhancement method for high-resolution spectrum subdivision. According to the invention, the spectrum subdivision algorithm based on Fourier transform is applied, so that spectrum subdivision and resolution enhancement are realized, and the optical fiber sensing precision enhancement method based on high-resolution spectrum subdivision has remarkable beneficial effects on the whole optical fiber sensing precision enhancement method based on high-resolution spectrum subdivision. Fourier transform can convert a time domain signal into a frequency domain signal, high-frequency noise and low-frequency interference are effectively removed through frequency domain filtering, and frequency components in a target spectral range are reserved, so that the purity of the spectral signal is improved. And the filtered frequency domain signal is restored into a time domain signal through inverse Fourier transform, so that the integrity of the signal is kept. Furthermore, the time domain signals are subdivided through a linear interpolation algorithm, the data point density is increased, and the spectral resolution is remarkably improved. And a more accurate and detailed data basis is provided for recognition and analysis of subsequent characteristic spectrums, so that the measurement precision and reliability of the optical fiber sensor are enhanced.

The invention discloses a control system and method for laser Doppler vibration measurement equipment, and relates to the technical field of vibration measurement equipment control, an emergency processing strategy library outputs a corresponding emergency processing strategy, and the equipment is processed after the emergency processing strategy is executed; an operation value is built according to feedback data of the received first-level alarm instruction, if the operation value exceeds the expectation, a second-level alarm instruction is sent to the outside, and key components of the equipment are maintained on time nodes meeting constraint conditions; and carrying out fault diagnosis by using the trained equipment fault diagnosis model, if the equipment has an operation fault, providing a maintenance scheme by an equipment fault maintenance knowledge graph according to fault characteristics, automatically switching key parts generating the fault, correcting measurement data, and outputting an actual measurement value and a measurement correction value. On the basis of controlling the equipment, the existing fault is maintained in a targeted manner according to the maintenance scheme.

The invention discloses a device and a method for testing the heat conductivity coefficient of a multi-layer heat insulation material of cryogenic storage and transportation equipment, and belongs to the technical field of cryogenic storage and transportation equipment. The device for testing the heat conductivity coefficient of the multi-layer heat insulation material of the cryogenic storage and transportation equipment comprises an outer tank, an inner tank and an inner tank, the inner tank is detachably arranged in the outer tank, and a heat insulation material winding area is arranged on the outer side wall of the inner tank and used for arranging a heat insulation material layer; the refrigerant liquid storage assembly is connected with the inner tank and used for filling liquid gas into the inner tank; the evaporation capacity measuring instrument is connected with the inner tank and is used for measuring the evaporation capacity of the liquid gas in the inner tank; and the temperature detection assembly is arranged in the outer tank so as to measure the temperature of the inner side and the outer side of the heat insulation material layer. The testing device and method provided by the invention can improve the reliability of the measurement of the heat conductivity coefficient of the multi-layer thermal insulation material of the cryogenic storage and transportation equipment.

The utility model discloses a flow measuring system based on a cooling water medium of a nuclear power plant, which comprises a flow measuring device arranged at a cooling water position of the nuclear power plant, the flow measuring device comprises a measuring tube and a differential pressure transmitter unit, the measuring tube comprises a measuring tube body, a porous balance pore plate and two sampling tubes, the porous balance pore plate is arranged in the center of the interior of the measuring tube body, the two sampling tubes are respectively arranged at the left end and the right end of the measuring tube body, one end of each sampling tube is communicated to the interior of the measuring tube body, and the other end of each sampling tube is respectively connected with the differential pressure transmitter unit; and the signal processing box is connected with the differential pressure transmitter unit and is used for receiving and processing the cooling water information sent by the differential pressure transmitter unit. The multi-hole balance pore plate can bear washing of a cooling medium, system foreign matter cannot be formed, and measurement reliability is improved.

The invention discloses a cable bending radius measuring device and measuring method, the measuring device comprises a measuring plate, and at least one side edge of the measuring plate is an arc-shaped bending edge; a wire diameter mark is arranged on one side of the arc-shaped bent edge of the measuring plate, and the wire diameter mark is used for marking the cross sectional area of the cable; the bending radius of the arc-shaped bending edge is set to be the minimum bending radius of the cable with the cross sectional area; the cable bending radius measuring device can replace visual observation or a ruler to measure the bending radius of a cable, the measuring accuracy and efficiency are improved, the bending radius of the cable is prevented from being smaller than the required minimum bending radius, and therefore it is guaranteed that the bending radius of the cable meets the requirement, and safe use of the cable is facilitated.

In the blood pressure measurement control device and the circuit, an air pump is communicated with an air inlet end of an external air bag and is used for inflating the external air bag; the deflation valve is used for being communicated with the air outlet end of an external air bag and used for exhausting air in the external air bag. The pressure sensor is communicated with the external air bag and is used for detecting the pressure in the external air bag; the pressure sensor, the air pump and the deflation valve are all electrically connected with the main controller; in the newborn mode, namely the B mode, the main controller is used for controlling one of the deflation valve B and the deflation valve C to be communicated with the air outlet end of the external air bag; in the child mode, namely the C mode, the main controller is used for controlling the deflation valve B and the deflation valve C to be communicated with the air outlet end of the external air bag at the same time. By means of alternate arrangement of the two newborn deflation valves, the measurement reliability in a newborn mode can be improved in an alternate working mode, and meanwhile blood pressure measurement in a pediatric mode with higher precision is achieved by means of synchronous working of the double newborn deflation valves.

The invention discloses an optical system distortion measuring device and method based on a rotary biprism, and belongs to the technical field of optical system measurement, a two-dimensional linear motion mechanism and a rotary biprism assembly are adopted to replace a multi-dimensional rotary table to achieve view field change, light beam translation and light beam deflection control, and motion errors of the multi-dimensional rotary table are avoided; the two-dimensional linear motion mechanism realizes the translational motion of the collimator, and the collimator does not need to be subjected to pitching state change, so that the safety risk caused by the pitching angle change of the collimator is avoided; the parallel light beam deflection control device has the advantages of being compact in structure, small in rotational inertia, capable of achieving large-angle deflection of large-aperture light beams and the like, and the measurement precision and reliability are improved.

The invention belongs to the field of hook pose measurement, and particularly discloses a tower crane hook three-dimensional pose real-time measurement method and system and a medium, the tower crane hook three-dimensional pose real-time measurement method is characterized in that a first UWB base station, a second UWB base station and a third UWB base station are respectively installed at a cab, the foremost end of a suspension arm and a tower crane foundation, and a first UWB label and a second UWB label are respectively installed at a trolley and a hook; obtaining the posture of the lifting hook based on data obtained by the second IMU at the lifting hook; obtaining trolley coordinates based on the distance between the first UWB tag and the first UWB base station; obtaining a second UWB label coordinate based on the first, second and third UWB base station coordinates; based on the posture of the lifting hook and the acceleration of the second IMU, lifting hook priori coordinates are obtained, then second UWB label coordinates are gathered, and the three-dimensional space position of the lifting hook is obtained; and obtaining a lifting rope inclination angle based on the three-dimensional space position of the lifting hook and the trolley coordinates. According to the invention, the three-dimensional pose of the tower crane hook can be measured in real time, and the measurement precision and reliability are effectively 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.

The present application discloses a method, system, terminal and medium for measuring parameters of a large-size diamond sheet. The method comprises: marking a target diamond sheet at a point to obtain a marked diamond sheet; measuring the marked diamond sheet to obtain surface data; generating a fitting curve according to the surface data, and calculating the radius of curvature corresponding to the fitting curve; if the radius of curvature is greater than a preset threshold, the target diamond sheet is judged to be qualified. The present application improves the accuracy of the assessment of the flatness and quality of the diamond sheet by measuring the surface data of the diamond sheet and calculating the radius of curvature, thereby improving the measurement accuracy.

The present invention discloses an error analysis and correction method for a load sensor, and relates to the technical field of load sensors. The method comprises: arranging a plurality of load sensors on a load test platform; applying a known load to a first load sensor, recording the first load sensor, and N groups of displacement data transmitted from the first load sensor to a second sensor... and an Nth sensor; performing transfer load error analysis according to the N groups of displacement data, and outputting N groups of transfer load errors; when the N groups of transfer load errors are greater than or equal to a preset error threshold, performing analysis according to a multi-bit error propagation model, and obtaining N-1 error correction indicators; performing error correction on the second sensor... and the Nth sensor according to the N-1 error correction indicators. The method solves the technical problem of inaccurate measurement caused by load transfer during the measurement process of the load sensor in the prior art, and achieves the technical effect of improving the accuracy and reliability of load measurement through error correction.

The invention provides a liquid viscosity measuring device and method.The device comprises a measuring container used for containing liquid to be measured, the top face of the measuring container is in a cone shape extending outwards, a closed control cavity is formed in the top end of the measuring container, and the inner diameter of the control cavity is smaller than the diameter of a measuring steel ball; the measuring steel ball is arranged in the measuring container; the rotating mechanism is used for driving the measuring container to rotate by 180 degrees around the horizontal axis of the measuring container, so that the measuring container is switched between an upright state and an inverted state; one end of the control cavity is directly communicated with the interior of the measuring container, the other end of the control cavity is communicated with the interior of the measuring container through a first pipeline provided with a first stop valve, and the other end of the control cavity is further provided with a pressure relief device used for adjusting the internal pressure of the control cavity. According to the invention, the ball falling time can be accurately measured, so that the liquid viscosity measurement precision is improved.

This invention provides a method and system for measuring couplings in hydro-generator sets based on marker point transfer, relating to the field of hydro-generator set installation and measurement technology. The method involves: S1: Setting reference marker points: Installing at least three non-collinear reference marker points on the runner and turbine shaft to be coupled; S2: Performing independent shape measurements on the runner and turbine shaft to determine their respective measurement references and obtaining a spatial positional relationship model between them and their respective component measurement references; S3: Measuring the current spatial coordinates of the reference marker points already set on the runner and turbine shaft; S4: Based on the reference marker point coordinates and the spatial positional relationship model, calculating the actual spatial position and orientation of the currently obscured runner coupling surface and turbine shaft coupling surface. This method achieves digital control of coupling accuracy, improves coupling operation efficiency, enhances measurement accuracy and reliability, increases installation efficiency, and improves the applicability of the method.

The invention discloses a cylindrical battery measurement method based on machine vision, which comprises a double-line scanning correlation system, the double-line scanning correlation system comprises a top surface camera and a bottom surface camera, and the measurement method comprises the following steps: S100, the top surface camera collects a cylindrical battery top surface depth map, and the bottom surface camera collects a cylindrical battery bottom surface depth map; s200, intercepting a point set of a predetermined area of the top surface of the cylindrical battery as a top surface measurement point cloud, and intercepting a point set of a predetermined area of the bottom surface as a bottom surface measurement point cloud; s300, importing a predetermined calibration matrix T, and transforming the top surface measurement point cloud and the bottom surface measurement point cloud into the same coordinate system; and S400, respectively fitting the plane equation of the top surface measurement point cloud and the plane equation of the bottom surface measurement point cloud in the same coordinate system to calculate the distance between the top surface and the bottom surface so as to obtain the height dimension of the cylindrical battery. Manual direct measurement is avoided, measurement is achieved through computer vision, and the measurement reliability is improved.

The invention provides a visual vibration measurement method with high generalization ability, which comprises the following steps: S1, selecting labels with high generalization ability: collecting historical labels and making the historical labels into a data set; a classic deep learning algorithm is selected for training to decide an optimal label and rule; s2, high-efficiency target detection: designing a high-efficiency detector; a simple target tracker is provided; and converting vibration displacement. According to the method, the practicability, the reliability and the accuracy of vision measurement vibration are remarkably improved, and a solid technical foundation is provided for application in related fields.

The invention discloses a detection signal noise reduction method based on an electrochemical workstation, and relates to the technical field of signal processing. According to the detection signal noise reduction method provided by the invention, according to a normal distribution rule of thermal noise generated during working of the electrochemical workstation and independent analysis and processing of each group of electrochemical experiment data, the noise is reduced; corresponding reverse noise is randomly generated by adopting a similar normal distribution rule to carry out independent noise reduction on each group of electrochemical experiment data, and the experiment data after noise reduction is displayed in real time, so that real-time efficient noise reduction processing on the electrochemical experiment data can be realized, and meanwhile, the real characteristics of an original acquisition signal and a noise signal can be greatly reserved; therefore, the electrochemical measurement precision and reliability are enhanced.

The invention discloses a design method of a vertical floating test system of an underwater structure. The method comprises the following steps: controlling the attitude of the underwater structure; counterweight ballast design is carried out; controlling an acoustic releaser; and indirectly measuring the movement speed in the floating process. According to the economical and effective measurement method for the unpowered underwater structure under the motion working condition, the acoustic releaser is used for controlling the separation of the weight ballast, so that the structure floats to the water surface in a stable posture by virtue of the buoyancy of the structure; the self-contained watertight depth meter is adopted to measure the depth in the floating process along with the movement of the structure so as to indirectly obtain the change of the movement speed. The invention provides a technical scheme for the measurement of a hydrodynamic noise floating body, the measurement of the target strength of a moving structure and other underwater domains.

The present invention discloses an instrument measurement detection and calibration method and system, which specifically relates to the technical field of instrument calibration, and is used to solve the problem that the potential error hidden danger of the increase of instrument measurement data deviation cannot be timely identified in the existing cold chain transportation. Before the start of the cold chain transportation, it is judged whether the altitude change affects the measurement accuracy, and by analyzing the historical error events and environmental parameters, the probability of intermittent error caused by condensation phenomenon is evaluated; based on the altitude change and the condensation error probability, it is judged whether the instrument calibration is needed; by analyzing the influence of the thermal hysteresis effect on the measurement quantified by the heat conduction path disturbance, and by analyzing the time-varying entropy transfer between the environmental parameters and the instrument signal, the influence of the environmental fluctuation on the instrument measurement accuracy is evaluated; the thermal hysteresis effect and the environmental influence are comprehensively evaluated to judge whether calibration is needed, thereby improving the measurement accuracy and stability of the instrument during the cold chain transportation, and ensuring the efficiency of the cold chain transportation and the quality of the goods.

The invention, which relates to the technical field of automatic transmission circuit diagnosis, discloses an automatic transmission circuit abnormity rapid diagnosis apparatus comprising a circuit test assembly used for testing circuit abnormity conditions. When the universal meter is used, the first meter shell is placed on the arm, then the first binding belt is pulled to cover the arm, the second binding belt covers the first binding belt, the hook face of the hook-and-loop fastener is pasted to the proper position of the loop face of the hook-and-loop fastener, and therefore the universal meter face is fixed to the arm of a tester. The rotating block is screwed, the extrusion rod and the threaded sleeve are driven to rotate, so that the threaded sleeve is rotated out of the threaded pipe, the rotating block is pressed, the suction cup is pushed to make contact with the table top through the extrusion rod, air in the suction cup is exhausted outwards under pressure, the suction cup is adsorbed to the workbench in the negative pressure state, and therefore the universal meter is fixed to the table top, and the stability of the universal meter is improved.

The present invention belongs to the field of hook posture measurement, and specifically discloses a real-time measurement method, system and medium for the three-dimensional posture of a tower crane hook, including: the first, second and third UWB base stations are respectively installed at the cab, the front end of the boom and the tower crane foundation, and the first and second UWB tags are respectively installed at the trolley and the hook; the hook posture is obtained based on the data obtained by the second IMU at the hook; the trolley coordinates are obtained based on the distance between the first UWB tag and the first UWB base station; the second UWB tag coordinates are obtained based on the first, second and third UWB base station coordinates; the hook priori coordinates are obtained based on the hook posture and the acceleration of the second IMU, and then the second UWB tag coordinates are combined to obtain the three-dimensional spatial position of the hook; the rope inclination angle is obtained based on the three-dimensional spatial position of the hook and the trolley coordinates. The present invention can realize the real-time measurement of the three-dimensional posture of the tower crane hook, and effectively improve the measurement accuracy and reliability.

The invention discloses a photoelectric load optical axis and IMU deviation calibration device and a calibration and use method thereof, relates to the technical field of optical correction devices, and solves the problems that a traditional photoelectric load optical axis and IMU deviation calibration device is low in precision and cannot be assembled and adjusted in batches. The device comprises a collimator which is internally provided with a detector and a light source; the reflector I corresponds to the first opening; a pentaprism; the semi-transparent and semi-reflective mirror II corresponds to the second opening; a reflector II; the reflecting mirror III corresponds to the third opening; a small reflector I and a small reflector II are adhered to the surface of the IMU; light emitted by the collimator is divided into two beams after passing through the reflector I, the pentaprism and the semi-transparent and semi-reflective mirror II, and one beam of light is emitted to the small reflector I from the second opening and is reflected by the small reflector I to return according to an original light path; and the other beam of light is emitted to the small reflector II from the third opening through the reflector II and the reflector III, and is reflected by the small reflector II to return according to the original light path, and the two beams of returned light are focused at the central position of the detector.

This application relates to the field of medical device technology, and provides a calibration device for a pressure guidewire, including a vascular simulation circuit and a pressure testing device. The vascular simulation circuit includes a connecting pipe, and a pump and a control valve connected sequentially through the connecting pipe. A biomimetic solution is placed inside the connecting pipe, and the pump provides power to drive the biomimetic solution to circulate. The pressure testing device is connected to the connecting pipe and has a head end for acquiring the liquid pressure in the connecting pipe. The control valve includes a main pipe and a first branch pipe and a second branch pipe respectively disposed on the main pipe. The connecting pipe includes a first pipe and a second pipe. One end of the first pipe is connected to the pump and the other end is connected to the second branch pipe. One end of the second pipe is connected to the pump and the other end is connected to the main pipe. The second branch pipe is used for inserting the pressure guidewire to be tested. The vascular simulation circuit simulates the real human intervention environment, reduces the influence of environmental errors, and improves calibration accuracy.

This invention relates to the field of optical measurement equipment technology, specifically disclosing a mirror fixing device for optical measurement, comprising: a base, wherein a support rod is slidably connected to the base, and a fixing frame is fixedly connected to the support rod; a rotating shaft, rotatably connected to the fixing frame, a connecting frame being fixedly connected to the rotating shaft, and two support shafts being rotatably connected to the connecting frame, with a fixing shell fixedly connected between the two support shafts; two fixing columns, each fixedly connected to both sides of the fixing frame, each fixing column being slidably connected to a sliding rod, and a guide ring being fixedly connected between the two sliding rods; and a connecting shell, fixedly connected to one side of the fixing shell, with a ball-end rod slidably connected to the connecting shell. This invention eliminates the need for easily fatigued springs, employing a fully mechanical threaded sleeve and worm gear transmission mechanism to achieve angle and direction adjustment. This mechanical structure eliminates the problem of elasticity attenuation and has strong resistance to vibration interference.