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7 March 2019 A novel Earth’s gravity method for accelerometer calibration
Shengyang Zhou, Chengang Cai, Ying Wang, Zhihua Liu, Ming Yang
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Proceedings Volume 11053, Tenth International Symposium on Precision Engineering Measurements and Instrumentation; 110532G (2019) https://doi.org/10.1117/12.2511921
Event: 10th International Symposium on Precision Engineering Measurements and Instrumentation (ISPEMI 2018), 2018, Kunming, China
Abstract
Advanced low frequency vibration calibration is imperative required as the wide applications of low frequency accelerometers. Low frequency calibration is commonly realized by the Earth’s gravity method or the laser interferometry. However, affected by the limited stroke of the standard vibration shaker, the calibration precision of laser interferometry at very low frequency is usually not ideal. Although the Earth’s gravity method can avoid this low calibration precision at very low frequency, its calibration frequency usually <5 Hz due to the influence of rotator centripetal acceleration. In this paper, the Earth’s gravity method mentioned in ISO 16063-16 is improved by using an effective image feature detection method. This method detects the angel between Earth’s gravity field direction and acceleration sensitivity axis direction to improve the Earth’s gravity static calibration accuracy.
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Shengyang Zhou, Chengang Cai, Ying Wang, Zhihua Liu, and Ming Yang "A novel Earth’s gravity method for accelerometer calibration", Proc. SPIE 11053, Tenth International Symposium on Precision Engineering Measurements and Instrumentation, 110532G (7 March 2019); https://doi.org/10.1117/12.2511921
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KEYWORDS
Calibration
Laser interferometry
Precision calibration
Hough transforms
Machine vision
Metrology
Standards development
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