由镜像电流源实现差动电阻式传感器测量的一种新方法  

A new measurement method for unbonded elastic wire resistance meters by introducing mirror current source circuit

作　　者：边静如[1] 毛良明 

机构地区：[1]南京工业职业技术学院,江苏南京210046 [2]基康仪器(北京)有限公司,北京100080

出　　处：《传感器世界》2014年第4期16-20,共5页Sensor World

摘　　要：针对现有的差动电阻式传感器不容易获得高精度测量结果的现实情况,提供了一种新型测量方法,通过引入一对镜像电流源,在原理上直接实现了电阻直流分量和交变分量的有效分离,信号处理时可以实现仅对交变分量的提取和放大,因此可以获得非常理想的测量灵敏度和测量精度。In view of the great difficulty of obtaining high accuracy measuring results for unbonded elastic wire resistance meters, a new method is presented in this paper, which introduces a mirror current source circuit to complete separation between DC component and alternating component of the resistors. By this new method the alternating component of resistor can be pick up as the only signal for amplification in the signal processing and ideal measuring sensitivity and precision can be reached.

关 键 词：差动电阻式传感器 安全监测仪器 数据采集 测量技术 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置] X924.3[自动化与计算机技术—控制科学与工程]