用于石英水平摆倾斜仪的静电力反馈技术

doi:10.12196/j.issn.1000-3274.2020.01.012

Abstract

Abstract: Quartz horizontal-pendulum tiltmeter has been widely used in seismic precursory observation. However, it still has some problems, for example, the sensitivity is unknown before on-site installation. To solve this problem, we introduce electrostatic force feedback technique into the quartz horizontal pendulum tiltmeter. We derive the theoretical transfer function and sensitivity of the instrument, and propose a method to realize both micro displacement measurement and electrostatic force feedback through a set of parallel metal plate structures. Then we perform detailed design and test. The experimental result shows that the accuracy of sensitivity parameter can be guaranteed after using the electrostatic force feedback technique.

Key words: Tiltmeter, Electrostatic force feedback, Differential parallel metal plate capacitor, Sensitivity

CLC Number:

P315.6

GAO Shang-hua, JIANG Feng, LI Ji-hong, XUE Bing, WANG Hong-ti. The Electrostatic Force Feedback Technology Used in Quartz Horizontal-Pendulum Tiltmeter[J]. EARTHQUAKE, 2020, 40(1): 151-158.

References

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The Electrostatic Force Feedback Technology Used in Quartz Horizontal-Pendulum Tiltmeter

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