A method for calibrating inter-axis crosstalk of multi-axis force sensor for dummy in automobile crash test

Abstract

The invention relates to a method for calibrating interaxial crosstalk of a dummy multi-axis force sensor used in an automobile collision test. The steps are: pre-calibration preparation, load test, and crosstalk calculation; the load test includes a loading test and an unloading test; the loading test is loaded to a full-scale load After holding, the collector displays the output values ​​of each axis of the multi-axis force sensor of the dummy and the load value of the tension press; during the unloading test, the loaded load is completely unloaded; after completing the test of each axis, read the output of each axis and the load value of the tension press. The load value of the press is calculated using the empirical formula to obtain the crosstalk value between the shafts. For crosstalk calculation, the empirical formula for interaxial crosstalk between the axial direction of the loading moment and the axial direction of the parallel force is: C ji =( θ jFS - θ jfs ) / θ nj ×100%; except for the case where the loading moment is axially parallel to the axial direction of the force, the empirical formula for interaxial crosstalk in other cases is: C′ ji =( Δθ nj / θ nj )×100%. The invention has the advantages of simple and scientific method, intuitive data, accurate calibration data and good operation repeatability.

Description

technical field [0001] The invention belongs to the field of calibration of automobile detection and test equipment, in particular to a method for calibrating interaxial crosstalk of a dummy multi-axis force sensor used in automobile collision tests. Background technique [0002] In the existing technology, the national metrology technical specification JJF 1560-2016 "Calibration Specification for Multi-Component Force Sensors" is suitable for the calibration of piezoelectric and strain-type multi-component force sensors, and its coupling error calibration and calculation methods are not suitable for multi-axis force sensors Crosstalk calibration; the sensors installed on various parts of the car crash test dummy are multi-axis force sensors. For this type of sensor, at present, there is only verification of parameters, and there is no calibration method. Contents of the invention [0003] The object of the present invention is to provide a method for calibrating inter-axi...

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Problems solved by technology

[0002] In the existing technology, the national metrology technical specification JJF 1560-2016 "Calibration Specification for Multi-Component Force Sensors" is suitable for the calibration of piezoelectric and strain-type multi-component force sensors, and its coupling error calibration and calculation methods are not suitable for multi-axis force sensors crosstalk calibration; the sensors installed on various parts of the body of the car crash test dummy are multi-axis force sensors. For this type of sensor, at present, only the verification parameters are available, and there is no calibration method

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