Accelerometer calibration system and calibration method within low g value range

An accelerometer and calibration system technology, applied in the field of calibration systems, can solve the problems of low accuracy of the impact acceleration calibration system, and achieve the effect of ensuring controllability and good repeatability

Inactive Publication Date: 2014-09-24
NAT INST OF METROLOGY CHINA
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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 ra

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  • Accelerometer calibration system and calibration method within low g value range
  • Accelerometer calibration system and calibration method within low g value range
  • Accelerometer calibration system and calibration method within low g value range

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[0100] Such as figure 1 , figure 2 , image 3 , Figure 4a , Figure 4b , Figure 4c , Figure 4d , Figure 5a , Figure 5b As shown, an accelerometer calibration system in a low g range includes a power source, a hammer head 3, an anvil head 4, two pairs of air bearings 6, a groove 7 and an impact acceleration detection module;

[0101] The groove 7 is fixed on the horizontal plane, and its cross-sectional shape is V-shaped. A power source, a pair of air bearings 6 supporting the hammer 3 and a pair of air bearings supporting the anvil 4 are arranged in sequence along the slotting direction of the V-shaped groove. 6. The hammer head 3 and the anvil head 4 are respectively suspended and fixed by a pair of the air bearings 6; one pair of the air bearings 6 are arranged at intervals along the length of the hammer head 3, and the other pair of the air bearings 6 are arranged at intervals along the length of the anvil head 4, and the hammer head 3 and the anvil head 4 respectively p...

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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...

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Application Information

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IPC IPC(8): G01P21/00
Inventor 胡红波李涛孙桥于梅过立雄吉鸿磊
Owner NAT INST OF METROLOGY CHINA
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