87 results about "Probe calibration" patented technology

The invention relates to the technical field of probe calibration, and discloses a probe calibration method and device and probe control equipment, and the method comprises the steps: calculating a vibration wavelength, and constructing a multi-probe measurement structure; synchronously acquiring a wafer surface vibration signal by using a multi-probe measurement structure, and calculating probe vibration characteristic data; acquiring a multi-measurement path electrical signal of the multi-probe measurement structure, and processing the multi-measurement path electrical signal through a baseline automatic encoder to obtain an environment temperature characteristic; calculating a signal deviation value between the measured signal and the baseline signal, and correcting the signal deviation value to obtain an electrical signal after temperature compensation; layered calibration is carried out on the probe vibration characteristic data and the electrical signal after temperature compensation to obtain a wafer electrical characteristic measurement result, so that a more comprehensive and accurate temperature compensation effect is realized, the calibration weight of each layer can be dynamically adjusted according to the probe vibration state and the temperature change degree, the calibration effect is optimized, and the measurement accuracy is improved. And the calibration method has higher environmental adaptability and robustness.

The embodiment of the invention is suitable for the technical field of medical imaging and image calibration, and provides an ultrasonic probe calibration method and system and electronic equipment, and the method comprises the steps: receiving an ultrasonic probe pose sequence and a calibration model pose sequence; receiving an ultrasonic image sequence; performing mark point identification and straight line identification on the ultrasonic image sequence to determine a first noise image and a second noise image in the ultrasonic image sequence; after the second noise image is deleted from the ultrasonic image sequence, time calibration is carried out on the ultrasonic probe, and a rate difference value between an ultrasonic probe displacement signal and an ultrasonic image displacement signal is obtained; and after deleting the first noise image from the ultrasonic image sequence, performing spatial pose calibration on the ultrasonic probe based on the rate difference value to obtain a spatial pose calibration matrix of the ultrasonic probe. By adopting the method, the calibration precision of the ultrasonic probe and the stability of the calibration result can be improved.

The invention relates to a robot three-dimensional surface type measurement system and a parameter calibration method. The method comprises the following steps: defining a coordinate system of the measurement system; the three-dimensional surface type measuring head calibration sub-method comprises the following steps of: optimizing a sphere center coordinate of a calibration sphere in a three-dimensional surface type measuring head coordinate system, and translating a three-dimensional surface type measuring head to obtain a plurality of groups of point pairs between the three-dimensional surface type measuring head coordinate system and a robot base coordinate system; a multispectral confocal probe calibration sub-method: points on the surface of the sphere are converted to a robot end coordinate system through an optimized multispectral confocal probe conversion matrix and then are converted to a robot base coordinate system, so that accurate alignment of the multispectral confocal probe coordinate system and the robot base coordinate system is realized; and fusing the measurement data under the robot base coordinate system by adopting a combined probe data fusion algorithm. Compared with the prior art, the method has the advantages of eliminating system errors caused by installation of the combined measuring head, improving fusion precision and the like.

The invention provides a five-hole probe correction method, which is used for correcting a five-hole probe in a cascade test, a left side pressure measurement hole of the corrected five-hole probe is a first hole, a central pressure measurement hole is a second hole, a right side pressure measurement hole is a third hole, a lower pressure measurement hole is a fourth hole, and an upper pressure measurement hole is a fifth hole. The correction method comprises the following steps: S1, acquiring a calibration curve of the five-hole probe, and acquiring total pressure distribution of a cascade outlet; s2, calculating to obtain a corrected pressure measurement value of the first hole and a corrected pressure measurement value of the third hole; s3, obtaining a corrected yaw angle and a corrected pitch angle by using the calibration curve; and S4, obtaining a corrected total pressure value and a corrected static pressure value by using the calibration curve. According to the invention, the problem of measurement distortion of angle measurement and pressure measurement of the probe calibration curve obtained under the condition of uniform incoming flow in wake measurement with non-uniform actual circumferential total pressure is solved, and the airflow angle in the wake of the cascade can be measured more accurately.

The invention discloses a multi-frequency electromagnetic detection signal generation method for composite material defect detection, and relates to the technical field of electromagnetic detection, and the method comprises the following steps: based on composite material structure layering, collecting response voltages of a composite material defect-free standard sample under different excitation frequencies, different structure layers and different directions; carrying out normalization processing on the response voltage, and calculating through an Ohm law to obtain an impedance characteristic curve of the composite material; finding an optimal frequency excitation point from the impedance characteristic curve, and calculating an impedance matching coefficient according to the optimal frequency excitation point; and probe calibration is carried out based on the impedance matching coefficient, and multi-frequency composite information is generated and output to an excitation coil of the excitation probe. Impedance matching of the composite material, the excitation coil and the differential coil is realized.

The invention discloses a probe calibration positioning method and a sample analyzer. The method comprises the following steps: establishing a first coordinate system according to an original point position of a probe; acquiring the coordinate deviation of the probe in the first coordinate system relative to the central position of the initial positioning ring; real coordinates of the positioning rings in the working areas in the first coordinate system are obtained according to the coordinate deviation; establishing a second coordinate system according to the real coordinates of the positioning rings in the first coordinate system; calculating the coordinate of each operation station in the working area in the second coordinate system according to the size of each working area; and converting the coordinate of each operation station in the second coordinate system into the coordinate under the first coordinate system through coordinate system conversion and a space vector algorithm, namely the calibrated coordinate of each operation station. According to the invention, calibration and accurate positioning of probe coordinates can be realized, and probe positioning errors are reduced.

The invention relates to a calibration device and system for rotor surface magnetic detection equipment, and belongs to the field of calibration devices.The calibration device comprises a probe calibration piece, and the probe calibration piece comprises a calibration magnet; the calibration magnet is of a cube structure, and a first through hole is formed in the bottom face of the calibration magnet. The method comprises the following steps: firstly, detecting a probe calibration piece by an authoritative detection mechanism to obtain a calibration value, installing the probe calibration piece at a fixed standard position in surface magnetic detection equipment, selecting a standard sample piece to the authoritative detection mechanism for detection to obtain a multi-point standard value of the standard sample piece, and putting the multi-point standard value into production detection. The probe is moved to the probe calibration piece at the fixed standard position to calibrate the probe and the probe positioning mechanism, and then the standard sample piece is used for multi-point calibration. The problems that an existing calibration device cannot switch between centering detection calibration and surrounding detection calibration of the rotor and the detection equipment, and the rotor is inconvenient to take and place are solved.

The invention relates to a radial shimming coil of a hollow cylindrical working area, which is characterized in that decoupling is carried out through a coupling effect of a magnetic shielding barrel and a coil magnetic field, a radial magnetic field component analytic function of the coil at any point in space is obtained through derivation based on a magnetic field superposition principle, and iterative solution is carried out by adopting a particle swarm optimization algorithm; the optimal coil design parameters meeting the target magnetic field distribution are obtained; a magnetic field with magnetic lines in a radial diverging shape and uniform size is formed in a hollow cylindrical working area and is used for magnetic compensation and probe calibration of magnetometers distributed in an annular array in the muscle magnetism and leg magnetism testing process, and the matching degree of the shimming effect and the sensitive direction of a sensor is improved.

The invention relates to the technical field of defect detection, in particular to an outer wall ultrasonic automatic detection device, a detection method and an identification method. The detection device is used for detecting the surfacing layer of the hydrogenation reactor, comprises a wall-climbing moving vehicle, an electronic control system, a probe frame, an ultrasonic coupling system, a probe device, a manual remote controller, a notebook computer and a cable, is high in automation degree and has the characteristics of multi-probe integration and high coupling stability, and a coupling system is optimized. According to the detection method, a full-automatic process from positioning, starting and multi-modal detection to real-time imaging is realized, multi-dimensional and full-coverage scanning of a detection area is realized, and various defects are effectively detected. According to the automatic identification method, intelligent identification and rechecking of defects are achieved through multi-probe calibration, color coding, image fusion and confidence degree evaluation, calibration and identification innovation is carried out, defect classification and mode identification science can be carried out, and comprehensive judgment capacity and a rechecking mechanism are achieved.

This invention proposes an ultrasonic probe calibration method, the steps of which are: constructing a calibration system; acquiring parameters of the calibration object and a first infrared tracking ball and fitting the calibration object parameters; acquiring multiple ultrasonic images and performing ellipse fitting on them; calculating the coordinates of the cone vertex in the three-dimensional image coordinate system; constructing the transformation matrix of the two infrared tracking balls; and obtaining the ultrasonic probe calibration result. The target point coordinates in the three-dimensional image coordinate system of this invention are calculated through geometric relationships, eliminating the need for a specific calibration device to establish the correspondence between the image and spatial position, and not relying on control scanning surface imaging. Compared with existing technologies, this method reduces operational difficulty and effectively improves calibration efficiency while ensuring calibration accuracy.

The application relates to a detector calibration method, a calibration device, a battery, a vehicle and a storage medium. The method comprises the following steps: collecting N particulate matter concentration information in a current environment in a preset period; determining a concentration change trend according to the N particulate matter concentration information; determining a noise value based on the concentration change trend and the N particulate matter concentration information, so that the detector can be accurately calibrated according to the noise value.

The invention discloses a method for determining a thermal pulse moisture probe calibration formula under any heating power, and aims to solve the problems that a complete test needs to be carried out under each heating power, the workload is large and the time consumption is long in the traditional calibration, three different heating powers Q are randomly selected, a Tt-w calibration test is carried out under the three heating powers, and the thermal pulse moisture probe calibration formula under any heating power is determined. According to the method, a Tt-Q linear relation is established, a corresponding Tt value under the target heating power is calculated in combination with a calibration formula, finally, a Tt-w empirical model is predicted through fitting, calibration formula coefficients A, B and C are obtained, a Tt-w calibration formula under the target power is obtained, and the calibration formula can be rapidly determined without independent calibration for each power. According to the method, the calibration efficiency of the thermal pulse moisture probe can be effectively improved, the test cost is remarkably reduced, the calibration precision is ensured, and the method has the advantages of simplicity, convenience, high efficiency and reliability and has good accuracy and practicability.

The invention relates to the technical field of ionizing radiation measurement, and discloses a delayed neutron detector calibration device and method. The delayed neutron detector calibration device comprises a box body, a point neutron source and a moving assembly. An independent working cavity and an independent mounting cavity are defined by the box body. And the point neutron source is arranged in the mounting cavity. The moving assembly is arranged in the box body, the connecting end of the moving assembly extends into the working cavity, and the connecting end of the moving assembly is connected with the detector. Wherein the moving assembly is used for driving the detector to move relative to the point neutron source, so that different positions of the detector correspond to the point neutron source, and the reading of the detector is obtained so as to perform segmented calibration on the detector. According to the method and the device, the delayed neutron detector can be calibrated on site, the time of the calibration implementation process of the delayed neutron detector is shortened, and the difficulty of the calibration implementation process of the delayed neutron detector is reduced.

This invention discloses a probe-based method for calibrating the tool coordinate system of an industrial robot. The method includes: first, installing a probe calibration block on the end effector of robot 1; then, using the probe calibration block to contact a fixed probe to establish the robot's user coordinate system at the center of the probe's ball head; next, removing the probe calibration block, installing the electric spindle and tool calibration block, and ensuring the tool calibration block's axis coincides with the needle-shaped grinding tool's axis; the robot holding the tool calibration block in a specific posture contacts the fixed probe to acquire robot position data, and calibrating the robot's tool coordinate system using the acquired position data and related algorithms. This invention reduces operational difficulty, improves tool coordinate system calibration accuracy, establishes a high-precision tool coordinate system calibration method, and solves the problem of low calibration accuracy in robot tool coordinate systems.

The invention belongs to the field of test fluid mechanics, and discloses a high-dynamic pneumatic probe calibration method and a calibration device thereof. The high-dynamic pneumatic probe calibration device comprises a probe supporting assembly and a two-degree-of-freedom supporting assembly, wherein the probe supporting assembly is fixed at the front end of the two-degree-of-freedom supporting assembly through a connecting plate; a servo motor is installed in the probe supporting assembly, the servo motor swings the probe at a high frequency under the stable incoming flow condition to simulate the high-dynamic flow field condition, and decoupling of the speed and the angle in the dynamic calibration process of the probe is achieved. According to the high-dynamic pneumatic probe calibration method, real-time pressure data of all pressure sensing holes of a probe serve as input, the real-time Mach number, the incidence angle and the sideslip angle of a flow field serve as output, a neural network method is adopted for modeling and data analysis, a calibration curve of probe dynamic flow field measurement is obtained, and calibration of the dynamic pneumatic probe is completed. According to the high-dynamic pneumatic probe calibration method and the calibration device thereof, the measurement precision of the pneumatic probe in a high-dynamic flow field is improved, and the high-dynamic pneumatic probe calibration method and the calibration device have engineering practical value.

The utility model belongs to the technical field of oscilloscopes, and particularly relates to an oscilloscope probe calibration device which comprises an oscilloscope body, a moving groove, a sliding groove and a positioning hole are arranged on the oscilloscope body, a roller is movably arranged in the moving groove, a sliding block is arranged in the sliding groove in a sliding mode, a horizontal contrast body is fixedly arranged on the sliding block, and the horizontal contrast body is fixedly connected with the oscilloscope body. A laser lamp is fixedly arranged on the horizontal contrast body, a bolt is movably arranged on the horizontal contrast body, and a spring is fixedly arranged on the bolt. According to the utility model, the left side of the oscilloscope is provided with the horizontal contrast body whose position can be adjusted, the horizontal contrast body can slide back and forth on the side surface of the oscilloscope through cooperation of the pulley, the moving groove, the slide block and the slide groove, and then the bolt is fixed in the positioning hole through the spring to complete fixation of the horizontal contrast body. The laser lamp on the horizontal contrast body can horizontally emit laser rays, contrast is completed through the horizontal laser rays and the waveform lines, and a user can conduct calibration more quickly and accurately when observing the waveform lines.

A system for non-destructive defect detection includes a calibration block and at least two phased array probes configured to transmit and receive pulsed echo signals. The calibration block includes a base metal having a first surface opposite a second surface, a corrosion resistant alloy coupled to the first surface of the calibration block, and a manual weld overlay extending from the first surface of the calibration block to a second surface of the calibration block. A method for non-destructive defect detection includes providing a system for non-destructive defect detection and calibrating at least two phased array probes of the system for non-destructive defect detection to form at least two calibrated phased array probes.

The application discloses an ultrasonic probe calibration method and device based on data dimension reduction and homographic transformation, and relates to the technical field of ultrasonic probe calibration. The method comprises the following steps: firstly, calculating the two-dimensional coordinates of each calibration point on an ultrasonic image based on an N-line calibration tool, and converting the two-dimensional coordinates to the ultrasonic probe coordinate system; then, determining a calibration plane coordinate system based on the three-dimensional coordinates of each calibration point in the ultrasonic probe coordinate system, and determining the transformation matrix between the two; finally, projecting the three-dimensional coordinates of each calibration point in the ultrasonic probe coordinate system into the calibration plane, and calculating the homographic transformation matrix; storing the calculated transformation matrix and homographic transformation matrix, and subsequently, conveniently and accurately converting the two-dimensional coordinates of any target point on the ultrasonic image into the three-dimensional coordinates of the target point in the ultrasonic probe coordinate system according to the transformation matrix and the homographic transformation matrix. The application can simplify the existing calibration process and improve the calibration accuracy of the ultrasonic probe.

The invention relates to the technical field of three-coordinate measuring machines, and particularly discloses a dynamic error compensation method for scanning probe calibration, which comprises the following steps: calibrating a probe deflection dynamic model based on a three-axis linear displacement sensor signal and delay time to obtain a calibrated probe deflection dynamic model; in the process of measuring the measured object by the three-coordinate measuring machine, recording the theoretical measurement position of the scanning probe and the signal of the three-axis linear displacement sensor at each sampling moment; performing interpolation processing on the three-axis linear displacement sensor signal at each sampling moment according to the delay time to obtain a three-axis linear displacement sensor signal at the delay moment; and inputting the signals of the three-axis linear displacement sensor at the delay moment into the calibrated measuring head deflection dynamic model for deflection calculation so as to obtain the actual deflection of the scanning measuring head at the current sampling moment. According to the dynamic error compensation method for scanning probe calibration provided by the invention, the calibration time is shortened, and meanwhile, the measurement precision is improved.

This invention discloses an ultrasonic scanning device for reactor pressure vessels, comprising a positioning unit and an ultrasonic scanning unit. The positioning unit includes a guide rail. The ultrasonic scanning unit includes a first substrate and three ultrasonic scanning components integrated on the first substrate. The three ultrasonic scanning components respectively perform ultrasonic scanning at three locations: the safety end weld of the nozzle, the nozzle side of the nozzle-cylinder connection weld, and the inner rounded corner area. The first substrate is connected to the guide rail and can move back and forth relative to the guide rail along its extension direction. The guide rail can rotate around its central axis in its extension direction. The three ultrasonic scanning components move back and forth along the guide rail with the first substrate to reach the corresponding working position and rotate circumferentially with the guide rail to perform a comprehensive scan at the corresponding working position, thereby improving the integration of the device. Furthermore, the calibration specimen is set on the first positioning component, and the ultrasonic probe calibration of the three ultrasonic scanning components can be performed underwater, eliminating the need for onshore calibration and improving work efficiency.

The invention provides an on-machine calibration method of a flexible ultrasonic probe, which belongs to the technical field of ultrasonic detection, abandons the current traditional limitation, introduces flexible length and angle deviation parameters, adopts a hemispherical shell calibration piece and a main shaft turntable type machine tool, establishes a reasonable mathematical calibration model, and realizes accurate calibration of probe parameters. According to the method, a mathematical model for flexible ultrasonic probe parameter calibration is established, and accurate calibration of flexible ultrasonic probe parameters is realized by utilizing optimization of a data point fitting target and a strategy. Although some other correction methods based on different principles or technologies may still exist in the field of ultrasonic probe calibration, the correction methods may not reach the level of the method in the aspects of universality, precision and the like, or other limitations and defects may exist in the implementation process. Therefore, the flexible ultrasonic probe calibration method has unique advantages and innovativeness, and is an effective and advanced technical scheme for solving the problem at present.

The application belongs to the technical field of electrochemical analysis and test, and discloses a chlorine ion probe calibration method based on selective coefficient correction. The method calibrates the main standard under the same ion intensity and temperature conditions as the sample, measures the selective coefficient of Br⁻ and I⁻, uses the extended potential-activity relationship to analyze and correct the interference, and obtains the accurate chlorine ion activity / concentration. The application is suitable for seawater, brine and other complex media, and significantly improves the accuracy, repeatability and traceability of measurement.

The invention discloses a five-hole probe calibration and data processing method based on deep learning, relates to experimental measurement of aerodynamic performance of a gas turbine, and is used for quickly and accurately processing data acquired by a five-hole probe in the gas turbine. The method comprises the following steps: carrying out a five-hole probe calibration experiment; constructing a five-hole probe neural network dimensionless calibration data set; constructing and training a five-hole probe neural network; carrying out turbine blade grid pneumatic experiment and five-hole probe experiment data acquisition; experimental data processing based on a neural network; and inverting aerodynamic parameters. The internal flow of a gas turbine is complicated and accompanied by a large airflow angle and a strong pressure gradient, fine measurement is often adopted for fully capturing flow characteristics, and the five-hole probe calibration and data processing method based on deep learning is constructed to be used for realizing rapid and high-applicability five-hole probe data processing.

The invention provides a multi-mode cooperative control method and system for an oral surgery robot, and belongs to the technical field of medical robots. The method comprises the steps that operation planning and space registration are completed, and a drill bit and an optical tracking ball are rigidly fixed to the tail end of a mechanical arm; a manual mode is started for coarse positioning, the mechanical arm is dragged, the optical navigator tracks the pose in real time and visualizes deviation, and the mechanical arm provides force assistance; after the drill bit reaches the preset range of the target area, the drill bit is switched to an automatic mode, and fine adjustment is completed through hand-eye calibration, probe calibration and closed-loop control; then switching to a cooperation mode, locking a preset direction dimension by the mechanical arm, controlling the implantation depth, and ensuring that a motion path is stable by the central processing unit through a dynamic constraint algorithm; and after the drill bit reaches the planned depth, the mechanical arm locks the depth direction, and the cooperation mode ends. According to the invention, the problems of insufficient precision and poor flexibility of the traditional technology are solved, and the positioning precision, the operation safety and the clinical execution efficiency of the oral surgery are improved.

The application provides a probe calibration device, and relates to the technical field of probe measurement, which comprises a measuring scale, wherein a scale mark with linearly increasing values is arranged on the measuring scale along a first direction; a probe channel for accommodating a probe to be measured is arranged on the measuring scale, and the probe channel is parallel to the first direction; a clamping mark comprises a sliding part, a blocking part and an indicating part; the sliding part is slidably arranged on the measuring scale, and the sliding direction is parallel to the first direction; the blocking part is fixedly connected with the sliding part, and the blocking part is used for abutting against the end of the probe to be measured; the indicating part is fixedly connected with the sliding part, and the indicating part is used for indicating the scale mark; and a locking mechanism is arranged between the clamping mark and the measuring scale, and is used for locking the relative position of the clamping mark and the measuring scale. The error existing in the probe calibration in the related art is effectively reduced.

The invention discloses a high-adaptability probe jig for detecting the contact resistance of an electric connector, and relates to the technical field of electric connector testing, and the high-adaptability probe jig comprises a workbench, a pressing rod which is fixedly connected to the workbench through a connecting piece and is used for vertically pressing downwards, and a pressure handle which is fixedly connected to the pressing rod and is used for driving the pressing rod to press downwards, the workbench further comprises a pressing plate fixedly connected to the bottom of the pressing rod. The bearing plate is fixedly arranged at the top of the workbench; the placing plate is fixedly connected to the workbench and located in the middle of the pressing plate and the bearing plate; and the probe calibration assembly is arranged in the bearing plate and the pressing plate in a sliding manner and can adaptively calibrate the centering of the hole based on the electric connector hole. According to the invention, the problems of large data transmission fluctuation and detection errors caused by the fact that the hole positions have deviation after part of connectors are processed, the positions of probes of the existing probe jig are fixed and cannot be adjusted after the probes are installed and the probes are difficult to align to the centers of the holes and are easy to touch the side walls due to superposition of the two probes are solved.

The application relates to an electromagnetic signal measurement method, device, computer equipment and storage medium. The method comprises the following steps: firstly, a near-field probe calibration matrix of an electromagnetic near-field probe calibration system is acquired, the near-field probe calibration matrix being generated based on characteristics of transmission signals in a closed loop of the electromagnetic near-field probe calibration system under different loads; then, an initial electromagnetic signal of a measured electronic device is corrected according to the near-field probe calibration matrix, so that a standard electromagnetic signal of the measured electronic device is obtained; finally, an electromagnetic interference result of the measured electronic device is determined according to the standard electromagnetic signal. The initial electromagnetic signal is obtained by measuring the measured electronic device through an electromagnetic field probe connected with the electromagnetic near-field probe calibration system. The electromagnetic interference of the electronic device can be accurately analyzed by using the method.

The application discloses a kind of probe calibration device and its calibration method, including mounting seat, installation surface is formed in the top of the mounting seat, torque loading mechanism is equipped on the installation surface;Connecting plate is arranged on the installation surface, and standard area is formed between the connecting plate and installation surface, and the top of the torque loading mechanism at least partially extends into the standard area;Calibration area is formed above the standard area, and cross plate probe is in the calibration area, the bottom of the cross plate probe extends into the standard area, and the top of the cross plate probe is connected with the connecting plate.The application can overcome the weight of calibration device to the front end of cross plate probe radial axis vertical generation force, influence the value transmission of cross plate probe, reduce the accuracy and calibration efficiency of the defects of the indication value calibration of cross plate probe.

The invention relates to an ultrasonic probe calibration device which comprises a main calibration plate (1), an auxiliary calibration plate (2), a fixing plate (3) and a calibration probe (4). The main calibration plate (1) and the auxiliary calibration plate (2) are oppositely arranged on the fixed plate (3) to form a track for the movement of an ultrasonic probe, the main calibration plate (1) is provided with a slot (101), and the plurality of calibration probes (4) are detachably mounted on the slot (101). Compared with the prior art, the ultrasonic probe calibration device is fast to operate, high in calibration efficiency, proper in size, easy to install and good in universality, and can be applied to calibration of most types of ultrasonic probes.

The invention relates to a method for improving on-machine measurement precision in self-adaptive milling of a linear welding blade disc, belongs to the technical field of precision manufacturing of aero-engines, and aims to solve the problems that existing probe calibration needs cold machine operation, time consumption is long, and precision is affected by thermal deformation of a machine tool. According to the method, a standard ball is fixedly installed on an A-axis base of equipment to establish a constant space reference, firstly, initial calibration of a cold machine is conducted, then the actual position of the center of the standard ball is measured in the thermal stability state of the equipment, and the obtained deviation value is dynamically compensated to internal parameters of a measuring head, so that online precision correction in the heat engine state is achieved. According to the method, the workpiece does not need to be disassembled, the calibration time is shortened from more than 12 hours to less than 30 minutes, the thermal deformation error is effectively controlled, the measurement deviation is controlled within 0.005 mm, and the cutter connecting precision and the machining quality of the linear welding blade disc are remarkably improved.