In this study, the application of micro-leverage in the monolithically all-quartz resonant accelerometer is proposed. The magnification of the micro-leverage structure used for a large size double-ended tuning fork (DETF) was analyzed. The effect of DETF’s dimension both on its own force–frequency sensitivity and micro-leverage’s magnification was investigated. Through the study of the relationship between DETF’s force–frequency sensitivity and micro-leverage’s magnification, the effect of micro-leverage and the DETF system on the sensitivity of the accelerometer was obtained. The problem of big error in theoretical calculation of micro-leverage magnification was solved because the structural arrangement of the output beam was ignored in the derivation process. The correctness of the analysis was verified by theoretical calculation, simulation, and the experiment. The equivalent structures of tension (compression) stiffness and flexural stiffness of the micro-leverage output beam were obtained by analyzing and simplifying the composite structure of the link beam and DETF. By simplifying the mechanical model of micro-leverage, the amplification factor K of micro-leverage is deduced to be 23. Therefore, the theoretical sensitivity of the sensor is 15.6 Hz/g. The experimental results show that the sensitivity of the accelerometer with the micro-leverage is 16.1 Hz/g, which is close to the theoretical analysis results.
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February 2021
Research Article|
February 11 2021
Research on micro-leverage in monolithic quartz resonant accelerometer
Cun Li
;
Cun Li
State Key Laboratory for Manufacturing Systems Engineering, Xi’an Jiaotong University
, Xi’an 710049, China
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Chao Han
;
Chao Han
a)
State Key Laboratory for Manufacturing Systems Engineering, Xi’an Jiaotong University
, Xi’an 710049, China
a)Author to whom correspondence should be addressed: [email protected]
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Yulong Zhao
;
Yulong Zhao
State Key Laboratory for Manufacturing Systems Engineering, Xi’an Jiaotong University
, Xi’an 710049, China
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Quanwei Zhang
;
Quanwei Zhang
State Key Laboratory for Manufacturing Systems Engineering, Xi’an Jiaotong University
, Xi’an 710049, China
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Bo Li
Bo Li
State Key Laboratory for Manufacturing Systems Engineering, Xi’an Jiaotong University
, Xi’an 710049, China
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a)Author to whom correspondence should be addressed: [email protected]
Rev. Sci. Instrum. 92, 025005 (2021)
Article history
Received:
September 07 2020
Accepted:
January 13 2021
Citation
Cun Li, Chao Han, Yulong Zhao, Quanwei Zhang, Bo Li; Research on micro-leverage in monolithic quartz resonant accelerometer. Rev. Sci. Instrum. 1 February 2021; 92 (2): 025005. https://doi.org/10.1063/5.0028633
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