Accelerometer calibration system and calibration method within low g value range

Abstract

The invention discloses an accelerometer calibration system and an accelerometer calibration method within a low g value range. The calibration system comprises a power source, a collider, an air bearing and an impact acceleration detection module; the impact acceleration detection module comprises an accelerometer, a laser interferometer and a data processing unit; the laser interferometer, the air bearing and the power source are sequentially coaxially arranged along the horizontal direction, and the collider is supported by the air bearing in a suspended manner; the accelerometer and the laser interferometer are electrically connected to the data processing unit. The calibration method comprises the steps of: impacting the collider by the power source, measuring the acceleration speed of the collider by the accelerometer and the laser interferometer respectively, transmitting measuring results to the data processing unit, comparing the measuring results, and thereby completing the calibration process. According to the accelerometer calibration system and the accelerometer calibration method within the low g value range, the control accuracy of peak of the impact acceleration speed is superior to 1%, the repeatability of peak of the impact acceleration speed is superior to 1%, transverse motion of the calibration system is superior to 3%, and uncertainty of measurement for peak of the impact acceleration speed of the calibration system is 0.5%.

Description

technical field [0001] The invention relates to a calibration system in the field of measurement and detection, in particular to an accelerometer calibration system and a calibration method in the range of low g values. Background technique [0002] At present, the devices that generate impact acceleration mechanical excitation mainly include the following types: drop hammer type impact acceleration mechanical excitation, pneumatic impact acceleration excitation system, pendulum type impact acceleration mechanical excitation and impact acceleration mechanical excitation system based on Hopkinson rods; [0003] The main disadvantages and deficiencies of the above-mentioned impact acceleration excitation system are: [0004] 1) It is difficult to accurately control the peak value of shock acceleration generated by the mechanical excitation system of shock acceleration. Generally speaking, the control accuracy of peak value of shock acceleration is difficult to reach 5%. [00...

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problem of low accuracy of the impact acceleration calibration system in the prior art, the present invention provides an accelerometer calibration system and calibration method in the range of low g value; through the improvement of the mechanical structure, the acceleration in a certain impact acceleration range is realized. Internal high-precision impact acceleration mechanical excitation system;

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