Modeling and improvement of a low-frequency micro-accelerometer

A sensitivity- and resolution-improving method for a low-frequency micro-vibration accelerometer is presented in this paper. A sensitivity model of the measurement system is derived and established. The key parameters that limit the sensitivity and the resolution of the accelerometer were identified...

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Bibliographic Details
Published in:Review of scientific instruments 2021-02, Vol.92 (2), p.025002-025002
Main Authors: Cheng, Z. Y., Liu, L. Y., Lei, Y. J., Li, H. L., Zhang, L. S., Li, R. J., Huang, Q. X.
Format: Article
Language:English
Subjects:
Accelerometers
Frequency ranges
Mathematical models
Parameter identification
Parameter sensitivity
Process parameters
Scientific apparatus & instruments
Sensitivity analysis
Signal processing
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Summary:A sensitivity- and resolution-improving method for a low-frequency micro-vibration accelerometer is presented in this paper. A sensitivity model of the measurement system is derived and established. The key parameters that limit the sensitivity and the resolution of the accelerometer were identified through the sensitivity coefficient analysis method. The structural parameters and the signal process method were then optimized. Experimental results show that the sensitivity of the accelerometer has improved from 1.10 V/(m/s2) to 19.21 V/(m/s2), and the resolution has improved from 1.47 mm/s2 to 0.21 mm/s2. The lowest working frequency range has expanded from 1 Hz to 0.7 Hz. The presented method is effective and cheap and can be applied to other sensors.
ISSN:0034-6748
1089-7623
DOI:10.1063/5.0024940