摘要
介绍一种以单片机和 5 5 5定时器为核心组成的低成本电容传感器系统。基于参考电容法可有效消除系统测量误差 ,优于直接测量法 ,提出分频同步测量法实现中频段被测脉冲信号周期的测量 ,可提高测量精度。系统具有硬件电路结构简单、智能化、功耗低等优点。
The smart low cost system for capacitive-sensor was designed,which mainly composed of PIC micro-controller and 555 timer.The system-error can be effectively eliminated by using reference capacitor.A method of prescale multi-cycle was presented,and is suitable for measurement of the cycle of middle frequencies.
出处
《仪表技术与传感器》
CSCD
北大核心
2001年第8期6-7,17,共3页
Instrument Technique and Sensor
