基于交流电桥的电容式水分检测电路的设计  

Design of circuit for examination of moisture content with capacitance sensor based on AC bridge

作　　者：徐涛[1] 宋文爱[1,2] 陈以方[2] 贺佳[1] 

机构地区：[1]中北大学信息与通信工程学院,山西太原030051 [2]清华大学无损检测技术实验室,北京100084

出　　处：《信息化纵横》2009年第11期17-20,24,共5页

摘　　要：在已有的在线水分含量检测方法中,电容法优势最为明显,可靠性和精度都较高。基于交流电桥原理设计了一种电容式传感器检测电路,并结合水分检测的具体要求,完成了对硬件电路的制作与调试,并通过实验验证了电路的可行性。Various ways have been developed in order to solve the problem of online examination of moisture content. Among all the methods which have been used recently, the advantages of measuring capacitance are most obvious, and it also has a relatively high level of reliability and precision. Based on the principle of AC bridge, an examination circuit using capacitance sensor is designed here. Combining with the requests of examination of moisture content, a hardware circuit is developed and debugged.The experiment proves the feasibility of the circuit.

关 键 词：交流电桥 电容式传感器 水分检测 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置]