电容传感器寄生电容干扰的产生原因及消除方法

Autoeciousness capacitance of capacitance sensor technology

分析了电容传感器寄生电容存在的主要原因,以及消除寄生电容干扰的几种方法:主要采用驱动电缆技术、运算放大器驱动技术、整体屏蔽技术、集成组合技术来减小寄生电容。

The capacitance sensor is of simple structure, the resolution ratio is high, temperature stability is good, having a good adaptability, the trends are of good performance, but the existence of the parasitic capacitance has influenced its performance characteristics seriously, the article has analysed the main reason existing in parasitic capacitance of the capacitance sensor , and dispel several kinds of methods that the parasitic capacitance interfere: Is it urge cable technology , operation amplifier urge technology , whole shielding technology , integrated combination technique is it reduce capacitance of depending on for a living to come to adopt mainly, in order to improve the performance of the sensor.