基于CAV424的电容式压力传感器测量电路设计  

Measuring Circuit of Capacitive Type Pressure Transducer Based on CAV424

作　　者：庞士信[1,2] 王超[1] 

机构地区：[1]沈阳工业大学,辽宁沈阳110870 [2]沈阳仪表科学研究院,辽宁沈阳110043

出　　处：《仪表技术与传感器》2011年第5期1-2,共2页Instrument Technique and Sensor

摘　　要：随着差动式硅电容传感器广泛应用于各行各业中,对差动电容信号的检测至关重要。文中提出基于CAV424电容检测芯片作为前置检测单元,实现了电容压力传感器测量电路。该电路具有稳定性好,抗干扰性强,且通过非线性补偿有良好的线性。实验结果表明,实际电路与理论分析具有良好的一致性。With differential capacitance sensor is widely used in industries of silicon,the differential capacitance on signal detection is essential.This paper presented a design based on capacitive sensing chip of CAV424 as a pre-detection unit,it achieved a measuring circuit of capacitive type pressure transducer.The circuit is stable,has good anti-interference feature,and good linear through the nonlinear compensation.The experiment results show that the electrical circuits and theoretical analysis have good consistency.

关 键 词：差动电容 CAV424 测量电路 

分 类 号：TP212.9[自动化与计算机技术—检测技术与自动化装置]