A method for calibrating inter-axis crosstalk of multi-axis force sensor for dummy in automobile crash test
A multi-axis force sensor and collision test technology, which is applied in the calibration/test of force/torque/power measuring instrument, vehicle test, vehicle impact test, etc., can solve the problem that there is no calibration method, and the coupling error calculation method is not applicable to multi-axis Force sensor crosstalk calibration, only check parameters and other issues, to achieve the effect of simple and scientific method, intuitive load data, and good operation repeatability
Active Publication Date: 2022-02-08
XIANGYANG DAAN AUTOMOBILE TEST CENT
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[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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[0011] The method of the present invention will be further described below.
[0012] Step 1, pre-school preparation: fixture adaptation, wiring harness connection, platform adjustment.
[0013] Fixture adaptation: Select a fixture that is compatible with the multi-axis force sensor of the dummy, and clamp the multi-axis force sensor of the dummy.
[0014] Harness connection: connect the signal harness of the dummy multi-axis force sensor, the force signal line corresponds to the force signal line interface of the dummy multi-axis force sensor, and the torque signal line corresponds to the torque signal line interface of the dummy multi-axis force sensor. Through the six-channel Raymond head to 232 interface conversion box, the multi-channel signal line is connected to two DC amplifiers. Through the BNC output interface of the DC amplifier signal, the output signals of the two DC amplifiers are connected to the BNC signal interface of the multi-channel data collector. Through...
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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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IPC IPC(8): G01L25/00G01M7/08G01M17/007
CPCG01L25/00G01M17/0078
Inventor 刘茹李昕涂远扬叶仁根贾莹莹
Owner XIANGYANG DAAN AUTOMOBILE TEST CENT
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