一种4～20mA电流输出的电容角度传感器  

Angle-measuring capacitive sensor with 4～20mA current output

作　　者：秦玉伟[1] 皇甫国庆[1] 金轶锋[1] 李芳菊[1] 

机构地区：[1]渭南师范学院物理与电子工程系,陕西渭南714000

出　　处：《传感器与微系统》2009年第11期86-88,共3页Transducer and Microsystem Technologies

摘　　要：介绍了一种新型的非接触式电容角度传感器，通过电容式信号转换集成电路CAV424和电压／电流转换接口电路AM402，电容角度传感器的角度变换量可以转换为4～20mA标准的工业电流输出。该系统结构简单，能有效的降低干扰和减少测量误差。用曲线拟合法对实验数据进行分析，结果表明：在0°～90°的角度范围内，电流输出与角度变化呈良好的线性关系，灵敏度可达0．18mA／（°）。A new-style non-contact capacitive sensor for measuring angle is introduced. Through capacitance signal conversion integrated circuit CAV424 and vohage-current conversion interface circuit AM402, the angle variety of capacitive sensor can be converted into 4 -20 mA standard industrial current output . The system has simple structure and anti-interference ability, can decrease measurement error. Curve fitting is used to analyze the experimental data,the results show that high linearity direct current is obtained with angle of 0°-90°, and the sensitivity is 0.18 mA/（ ° ）.

关 键 词：角度 电容传感器 电流 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]