YUAN Xiao-kang1, JIAO Xin-quan1, CHU Cheng-qun1, YANG Wen-hao2
（1. Science and Technology on Electronic Test & Measurement Laboratory， North University of China,Taiyuan 030051,China；2. The No.58 Research Institute of China Electronics Technology Group Corporation, Wuxi 214035, China）
Abstract： A piezoelectric sensor charge/voltage conversion circuit is designed based on the principle that piezoelectric sensor can convert the vibration or shock acceleration into the charge proportionally. Effect of temperature characteristic of feedback capacitor on the switching circuit output is analyzed based on the acquisition and measurement system in this paper. The characteristics of different filters are analyzed, and the corresponding filter circuit is configured according to the actual sensor bandwidth. Experiments show that the circuit can effectively filter out noises among the vibration signal and obtain vibration signal accurately.
Key words： vibration; piezoelectric sensor; singal conditioning circuit; feedback capacitor
CLD number： TP212 Document code： A
Article ID： 1674-8042（2018）02-0174-06 doi： 10.3969/j.issn.1674-8042.2018.02.012
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振动传感器信号调理电路设计及分析
袁小康1， 焦新泉1， 储成群1， 杨文豪2
（1. 中北大学 电子测试技术重点实验室， 山西 太原 030051； 2. 中国电子科技集团第五十八研究所， 江苏 无锡 214035）
摘要:基于压电式传感器能把振动或冲击的加速度转换成与之成正比的电荷这一原理， 提出了该类型传感器的等效电路。 设计了基于采集测量系统的压电式传感器电荷/电压转换电路， 分析了电路中关键元器件——反馈电容的温度特性对于转换电路输出的影响， 对不同类型滤波器进行了特性分析， 并根据实际传感器带宽配置了相应滤波电路。 通过试验表明， 该信号调理电路能有效滤除振动信号中的噪声信号， 并能获取精确的振动信号。
关键词:振动； 压电传感器； 信号调理电路； 反馈电容
引用格式：YUAN Xiao-kang, JIAO Xin-quan, CHU Cheng-qun, et al. Design and analysis of singal conditioning circuit for vibration sensor. Journal of Measurement Science and Instrumentation, 2018, 9(2)： 174-179. ［doi： 10.3969／j.issn.1674-8042.2018.02.012］
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