Performance evaluation of high g accelerometers

Lu, Yao; Cheng, Yan; Sun, Yingli

doi:10.1007/s12206-013-0857-5

Cited by 8 publications

(1 citation statement)

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“…Elaborate analyses of the Hopkinson bar technique were also performed with two models of the incident strain pulse and quartz stress gauge, aiming to exactly evaluate the accelerometers' performance, and the excellent agreement was found in the acceleration characteristics [9]. Based on this technique, similar works were performed to optimize it for specific engineering applications [10][11][12], with special attention paid to the acceleration level below 10,000 g [13]. Different fixtures were also designed and modified, to ensure the calibrating accelerometer undergo the desired acceleration history from the Hopkinson bar end [4,5,7,13].…”

Section: Introductionmentioning

confidence: 99%

Metrology and Measurement Systems

Miao¹

2019

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The Hopkinson pressure bar has been developed to calibrate and assess high g accelerometers' capacity. The extreme caution is indispensable for performing calibration of severe characteristics, like the bearable super-high overload peak and wide duration of stress. In the paper, the Hopkinson bar calibrating system is being critically appraised. A limiting formula is deduced based on the stress wave theory. It indicates that the overload peak and duration of stress are limited by the elastic limit and wave speed of Hopkinson bar material. Both stress wave configurations in the form of linear ramp and cosine functions were designed theoretically to meet typical calibrating requirements. They were confirmed experimentally with the aid of the pulse shaping technique. Their corresponding calibration characteristics were analysed critically, and it was found that the cosine stress wave can achieve the values of acceleration peak or duration by π/2 times greater than those obtained with the linear stress wave. Finally, some suggestions are proposed for more extreme calibration requirements.

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