摘要
基于电容感应开关特性,采用将被测电容转换成微处理器可直接处理的二进制数字信号,克服了传统易受寄生电容和电源电压稳定性不足的影响,并且通过对电容感应式开关设计中存在的高频噪声、温度、湿度及其他外界因素的分析和处理,大大提高了开关的稳定行和精确性,实现了一种具有功耗低,稳定、结构简单的非接触式电容式感应开关。
A non-contact capacitive induction switch with low power consumption and simple structure was designed based on the characteristics of capacitive induction switch. The design converted capacitance into binary digital signal which could be processed by microprocessor, overcame the influence of parasitic capacitance and unstable power supply, processed high frequency noise, temperature and humidity existed in the capacitive induction switch design, and improved stability and accuracy of the switch.
出处
《现代电子技术》
2011年第21期196-198,共3页
Modern Electronics Technique
关键词
非接触
电容式
感应开关
噪声
non-contact
capacitance
inductive switch
noise
