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- Title
一种差动式电容传感器信号检测方法研究.
- Authors
孙盼盼; 高尚华; 薛兵; 廖裕龙; 王倩倩
- Abstract
In order to improve the measurement accuracy of the signal detection circuit of differential capacitive sensors, this paper proposes a method that combines Delta-Sigma modulation technology with differential capacitive sensors to create a new type of signal det ection system. This signal det ection method places differential capacitive sensors, preamplifiers, and phase sensitive detection circuits within a Delta-Sig ma feedback loop, forming a large feedback loop. By deriving the system transfer function of the detection circuit, we analyzed the technical advantages of using Delta-Sigma modulation technology in this detection method a circuit board and tested it. The research results indicate that the digital output of the signal detection method proposed in this article has a high correlation with the magnitude and direction of the deviation of the center plate from the equilibrium position, which has a good promoting effect on further improving the measurement accuracy of the differential capacitive sensor detection circuit.
- Subjects
CAPACITIVE sensors; SIGNAL detection; PREAMPLIFIERS; TECHNOLOGY; ELECTRIC circuits
- Publication
Earthquake (1000-3274), 2024, Vol 44, Issue 2, p159
- ISSN
1000-3274
- Publication type
Article
- DOI
10.12196/j.issn.1000-3274.2024.02.011