CN-121804565-B - Device and method for calibrating wide-range multi-component sensor

CN121804565BCN 121804565 BCN121804565 BCN 121804565BCN-121804565-B

Abstract

The invention relates to the technical field of sensor calibration equipment, in particular to a wide-range multi-component sensor calibration device and a wide-range multi-component sensor calibration method. According to the invention, through the integrated rotating and locking mechanism, full-automatic switching and accurate positioning of the sensor testing direction are realized, the movable disk is driven by the air cylinder, the rotating pipe and the sensor above the movable disk are driven by the spiral shifting groove to integrally rotate by 90 degrees, and rigid locking is realized by means of the cooperation of the limiting rod and the positioning hole of the fixed cylinder, so that the multidirectional testing which can be completed only by manually disassembling and reloading or using a plurality of independent stations in the traditional calibration is integrated into automatic serialization action under one clamping.

Inventors

MA HAIKUAN
CAO XUAN
WU NING
ZHANG SHUWEI
CHU DONGZHI
LIU YAN
GAO YANG
WANG JINGRU
WANG YANG
LIU FENGQING

Assignees

山东省科学院海洋仪器仪表研究所
崂山国家实验室

Dates

Publication Date: 20260508
Application Date: 20260311

Claims (10)

1. The wide-range multi-component sensor calibration device is characterized by comprising a calibration table, a rotary table arranged in the calibration table, force loading devices arranged on the left side, the right side and right above the rotary table, and a driver for adjusting the internal structure position of the force loading devices; The rotary table comprises an air cylinder, a rotating part, a sensor body rotating along with the rotating part and a force acting part which are sequentially arranged from bottom to top; The rotating part comprises a fixed cylinder, a rotating pipe rotating in the fixed cylinder, a moving disc sliding in the rotating pipe and driven by an air cylinder, a pair of shifting blocks arranged on the outer wall of the moving disc, a pair of circular rings arranged on the upper side and the lower side of the moving disc and a plurality of limiting rods circumferentially distributed in the pipe wall of the rotating pipe and capable of stretching radially, wherein two shifting grooves are formed in the inner wall of the rotating pipe, when the air cylinder drives the moving disc to move upwards, the shifting blocks drive the rotating pipe to rotate by 90 degrees after moving along the shifting grooves, and when the moving disc moves to the top, the limiting rods positioned on the outer side of the moving disc are extruded through the circular rings to fix the rotating pipe; The force acting part comprises a fixed disc fixedly connected to the top surface of the sensor body through bolts, four eccentric blocks welded and fixed on the outer wall of the fixed disc in a regular manner, a sleeve arranged at the center of the top surface of the fixed disc and a connecting rod rotating in the sleeve, and force is respectively acted on the eccentric blocks and the sleeve through the connecting rod, so that the radial bending moment and the axial force component of the sensor body can be measured; then, controlling hydraulic cylinders at the left side and the right side of the rotary table to sequentially act, respectively applying horizontal acting force to the side surfaces of the eccentric blocks at the left end and the right end of the fixed disc through the force acting rod, and synchronously acquiring and recording output signals of the sensor body so as to calibrate force response of the sensor in the Fx direction; after the operation of a motor of the driver is controlled, screw rods in a pair of force loading devices are driven to rotate through gear transmission, sliding tables on the left side and the right side are driven to move oppositely along guide rails until force acting rods move to positions opposite to the side surfaces of eccentric blocks at the front end and the rear end of a fixed disc; Then, the vertical acting force is downwards applied to the top surface of the eccentric block through the driving force acting rod of the hydraulic cylinder, and as the acting point deviates from the center of the sensor, the vertical acting force simultaneously generates bending moment around the X axis, and the output signals of the sensor body are synchronously acquired and recorded to acquire response data under Fz and Mx composite load.
2. The device for calibrating the wide-range multicomponent sensor according to claim 1, wherein the calibration table comprises a supporting table plate, supporting rods fixedly connected to corners of the top surface of the supporting table plate through bolts, top plates fixedly connected to the top ends of the four supporting rods through bolts, a mounting frame welded on the top surface of the top plates and supporting legs fixedly connected to corners of the bottom surface of the supporting table plate through bolts, a through groove is formed in the center of the top plates, and a partition plate is clamped inside the supporting table plate.
3. The calibrating device for the wide-range multicomponent sensor according to claim 2, wherein the air cylinder is fixedly connected to the bottom surface of the partition plate through bolts, the fixed cylinder in the rotating part is clamped and fixed between the supporting platen and the partition plate, positioning holes are formed in the inner wall of the fixed cylinder at corresponding positions of the limiting rod, the end parts of the two poking grooves in the rotating pipe are vertical, the middle part of the two poking grooves are spiral, and through holes for sliding of the limiting rod and with H-shaped longitudinal sections are formed in the rotating pipe.
4. The device for calibrating the wide-range multicomponent sensor according to claim 3, wherein the movable disc is clamped and fixed at the end part of the telescopic rod of the air cylinder, the shifting block is clamped and fixed on the outer wall of the movable disc, a first spring is welded between the circular ring and the end part pipe wall of the rotary pipe, the circular ring is pushed to move towards the direction of the movable disc by the elastic force provided by the first spring, the protruding block at the end part of the limiting rod is matched with the size of the positioning hole, a second spring is sleeved outside the central shaft of the limiting rod, the end part of the second spring is welded on the hole wall at the inner side of the through hole, and the limiting rod is pushed to move towards the inside of the rotary pipe by the elastic force provided by the second spring.
5. The device of claim 4, wherein the turntable further comprises a turntable fixedly connected to the top end of the rotating tube by bolts, and a connection disc fixedly connected to the top surface of the turntable by bolts, and the sensor body is fixedly connected to the top surface of the connection disc by bolts.
6. The device of claim 5, wherein the force applying portion further comprises a limiting block sliding in the groove of the outer wall of the connecting rod and a third spring welded between the groove of the outer wall of the connecting rod and the inner wall of the limiting block, the outer wall of the sleeve is provided with a limiting groove with the size matched with that of the limiting block, and the limiting block is in a flat-top curved surface shape.
7. The device of claim 6, wherein the force loading device comprises a guide rail fixedly connected to the top surface of the support platen through bolts, screw rods rotatably connected to brackets at two ends of the top surface of the guide rail, a sliding table slidably connected to the top surface of the guide rail and in threaded connection with the screw rods, a hydraulic cylinder fixedly connected to the outer wall of a protruding frame body on the top surface of the sliding table through bolts, and a force acting rod clamped at the end part of a telescopic rod of the hydraulic cylinder, wherein the guide rail in the force loading device right above is fixedly connected to the outer wall of the mounting frame through bolts, and the end part of the force acting rod in the force loading device right above is fixedly connected with the connecting rod through bolts.
8. The device of claim 7, wherein the driver comprises a motor, a rotating shaft coaxially connected to an output shaft of the motor, two main bevel gears symmetrically arranged and clamped and fixed on the outer wall of the rotating shaft, and a secondary bevel gear meshed with the main bevel gear, wherein the secondary bevel gear is clamped and fixed at the end part of a screw rod in the lower force loading device.
9. The device for calibrating the wide-range multicomponent sensor according to claim 8, wherein the driver further comprises two bending frames which are symmetrically arranged and fixedly connected to the top surface of the supporting platen through bolts and a shaft seat for supporting the rotating shaft, the motor is fixedly arranged on the outer wall of the bending frames through bolts, and the motor fixedly connected to the mounting frame through bolts is arranged on the outer side of the end part of the screw rod in the upper force loading device.
10. A method of calibrating a wide-range multi-component sensor using the wide-range multi-component sensor calibration apparatus of claim 9, comprising the steps of: s1, firstly, an operator fixedly installs a sensor body to be calibrated on a connecting disc, the connecting disc is fixed on the top of a rotating disc, and then a connecting rod in a force acting part is fixedly connected with the end part of a force acting rod of a force loading device positioned above; S2, controlling hydraulic cylinders on the left side and the right side of the rotary table to sequentially act, respectively applying horizontal acting force to the side surfaces of the eccentric blocks on the left end and the right end of the fixed disc through force acting rods, and synchronously collecting and recording output signals of the sensor body so as to calibrate force response of the sensor in the Fx direction; after the operation of a motor of the driver is controlled, screw rods in a pair of force loading devices are driven to rotate through gear transmission, sliding tables on the left side and the right side are driven to move oppositely along guide rails until force acting rods move to positions opposite to the side surfaces of eccentric blocks at the front end and the rear end of a fixed disc; S3, subsequently, controlling a motor positioned above to rotate, driving a sliding table in a force loading device above to move, positioning a hydraulic cylinder and a force acting rod to be right above the top surfaces of eccentric blocks at the left end and the right end of a fixed disc in sequence, and then applying a vertical acting force to the top surfaces of the eccentric blocks downwards through the driving force acting rod of the hydraulic cylinder, wherein the vertical acting force simultaneously generates a bending moment around an X axis due to the fact that an acting point deviates from the center of a sensor, and synchronously acquiring and recording output signals of a sensor body to acquire response data under Fz and Mx composite load; S4, then, the control cylinder drives the moving disc to move upwards, so that the shifting block moves along the spiral shifting groove to drive the rotating tube and the sensor body to rotate 90 degrees, then the moving disc continues to move upwards to the top end, the limiting rod is extruded by the circular ring to enable the limiting rod to extend out radially and be inserted into the positioning hole of the fixed cylinder, and the rotating tube is locked at the rotated position; S5, subsequently, controlling the force loading devices at the left side and the right side to repeat the operation in the S2, and carrying out lateral force calibration again on the sensor body rotating by 90 degrees, wherein physical quantities corresponding to the calibration are Fy and Mz respectively under the original coordinate system of the sensor; S6, controlling a hydraulic cylinder driving force acting rod and a connecting rod above to move downwards so that the connecting rod is inserted into the sleeve, applying vertical downward acting force to the sleeve, synchronously collecting and recording output signals of the sensor body to calibrate the response of pure axial force-Fz in the negative direction of the Z axis; and S7, finally, based on all the standard load values and the sensor output signals recorded in the steps, the calibration is completed through a sensitivity matrix and each dimension coupling coefficient of the sensor by a system identification algorithm Jie Suanchu, then, the cylinder is controlled to drive the movable disc to move downwards to reset the rotating part, the upper hydraulic cylinder is controlled to separate the connecting rod from the sleeve, and the calibrated sensor body is taken out.

Description

Device and method for calibrating wide-range multi-component sensor Technical Field The invention relates to the technical field of sensor calibration equipment, in particular to a device and a method for calibrating a wide-range multi-component sensor. Background The wide-range multi-component sensor is a precision device capable of measuring physical quantities such as force, moment or acceleration in multiple directions at the same time, and the core calibration aim is to establish an accurate mathematical relationship between each input component and output signals in a wide range and eliminate cross interference among the components, and usually, accurate and controllable multi-dimensional standard load is applied to professional multi-axis calibration equipment to systematically acquire full-range data, and high-precision decoupling and output correction are realized through a compensation matrix by utilizing algorithm identification parameters. The patent with the application number of CN202510935288.X discloses a wide-range multi-component sensor calibration device and a method, wherein equipment parts are firstly checked, a target temperature range and a compensation model of each temperature interval are set, dynamic temperature control is started, deformation of a jig is monitored in real time, a transient temperature gradient suppression technology is applied, multi-physical-quantity calibration is performed, compensation measured values are output, multi-environment coupling calibration test conditions are set to simulate actual working conditions, calibration data of each physical quantity are monitored and recorded, and finally a calibration error is calculated by combining a calibration result and a reference standard value. However, when the existing calibration device calibrates the sensor, manual operation is usually needed to disassemble, reinstall or transfer the sensor between different stations, the process is low in efficiency and automation, reloading errors are inevitably introduced, calibration standards in all directions are difficult to unify, the consistency and the repetition accuracy of calibration are seriously affected, in addition, when a composite load capable of simultaneously generating axial force and bending moment around a shaft is applied, the existing method often needs to perform complex multi-step load superposition operation or rely on complex tool combination, the required composite load state cannot be directly and efficiently generated, the calibration process is complex, and high-quality original data required by decoupling calculation are difficult to directly obtain. In view of this, we propose a wide-range multicomponent sensor calibration device and method. Disclosure of Invention The invention aims to provide a wide-range multi-component sensor calibration device and a wide-range multi-component sensor calibration method, which realize full-automatic switching and accurate positioning of a sensor testing direction through an integrated rotating and locking mechanism so as to solve the problems in the background technology. In order to achieve the above object, in one aspect, the present invention provides the following technical solutions: The wide-range multi-component sensor calibration device comprises a calibration table, a rotary table arranged in the calibration table, force loading devices arranged on the left side, the right side and right side of the rotary table and a driver for adjusting the internal structure position of the force loading devices; The rotary table comprises an air cylinder, a rotating part, a sensor body rotating along with the rotating part and a force acting part which are sequentially arranged from bottom to top; The rotating part comprises a fixed cylinder, a rotating pipe rotating in the fixed cylinder, a moving disc sliding in the rotating pipe and driven by an air cylinder, a pair of shifting blocks arranged on the outer wall of the moving disc, a pair of circular rings arranged on the upper side and the lower side of the moving disc and a plurality of limiting rods circumferentially distributed in the pipe wall of the rotating pipe and capable of radially stretching, wherein two shifting grooves are formed in the inner wall of the rotating pipe; When the cylinder drives the moving disc to move upwards, the shifting block drives the rotating tube to rotate 90 degrees after moving along the shifting groove, and when the moving disc moves to the top end, the limiting rod positioned on the outer side of the moving disc is extruded by the circular ring, so that the rotating tube is fixed; The force acting part comprises a fixed disc fixedly connected to the top surface of the sensor body through bolts, four eccentric blocks regularly welded and fixed on the outer wall of the fixed disc, a sleeve arranged at the center of the top surface of the fixed disc and a connecting rod rotating in the sleeve; The radial bending mome