| 一种电容式传感器信号调理电路的设计 |
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| 引用本文： | 张丽霞,杨忠华,孙金花,牛德芳.一种电容式传感器信号调理电路的设计[J].物探装备,2007,17(2):79-82. |
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| 作者姓名： | 张丽霞 杨忠华 孙金花 牛德芳 |
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| 作者单位： | 山东威海双丰电子集团有限公司,山东威海,264209 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 与常规检波器不同,MEMS电容式加速度传感器所获得的是地震信号变化引起的电容的变化量.为了将这个电容的变化量转换为电压信号输出,而且使该传感器能有效接收到深层反射回来的微弱信号,我们设计了一种电容式传感器的调理电路.本文对组成该调理电路的接口电路、放大电路、低通滤波电路进行了详细地分析,并对调理电路的性能进行了实际检测.
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| 关 键 词： | 电容式传感器 调理电路 接口电路 信号放大电路 低通滤波电路 |
| 修稿时间： | 2006年6月14日 |
Design of signal conditioning circuit for a kind of capacitive sensor |
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| Zhang Lixia.Design of signal conditioning circuit for a kind of capacitive sensor[J].Equipment for Geophysical Prospecting,2007,17(2):79-82. |
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| Authors: | Zhang Lixia |
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| Abstract: | Different from normal geophone,what acquired by MEMS capacitance accelerometer is the change of capacitance caused by change of seismic signal.In order to transform the change of capacitance to signal voltage output,and to effectively receive the faint signal reflected from deep interfaces,we design the signal conditioning circuit of a capacitive sensor.This paper analyzes in detail the interface circuit,amplifying circuit and lowpass filter circuit composing the conditioning circuit,and carries out the practical detection for the performance of the conditioning circuit. |
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| Keywords: | capacitive sensor conditioning circuit interface circuit amplifying circuit low-pass filtering circuit |
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