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Design of a Differential Capacitive Horizontal Pendulum Tiltmeter
Xiaodong Li1, Yinchao Lian1, Dongxiao Guan1
1Earthquake Agency of Xinjiang Uygur Autonomous Region, Urumqi 830011, China.
Sensors (Basel, Switzerland)
|July 28, 2026
Summary
This study introduces an improved horizontal pendulum tiltmeter using electrostatic feedback. The novel design enhances practical applicability and overcomes calibration issues for geophysical observations.
Area of Science:
- Geophysics
- Instrumentation
- Sensor Technology
Background:
- Horizontal pendulum tiltmeters are crucial for geophysical ground deformation observation.
- Conventional quartz tiltmeters face challenges with scale factor variation and frequent calibration.
- Existing designs can be bulky, hindering deployment and installation.
Purpose of the Study:
- To engineer an improved differential capacitive horizontal pendulum tiltmeter.
- To enhance practical applicability and overcome limitations of conventional tiltmeters.
- To develop a compact and easily deployable tilt measurement instrument.
Main Methods:
- The study utilized a Zöllner double-suspension-wire pendulum configuration.
- Engineering improvements included replacing quartz fibers with tungsten wires.
- Optical lever sensors were substituted with capacitive sensors, and an electrostatic feedback principle was incorporated.
Main Results:
- The enhanced tiltmeter exhibits a compact structure and reduced size.
- The new design significantly facilitates deployment and installation.
- The scale factor variation issue, common in traditional pendulums, is overcome, reducing calibration needs.
Conclusions:
- The differential capacitive horizontal pendulum tiltmeter with electrostatic feedback offers enhanced practical applicability.
- This improved instrument is vital for accurate geophysical ground deformation observation.
- The engineering modifications lead to a more robust and user-friendly tiltmeter.
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