QIN Yu-wei, HUANFU Guo-qing, JIN Yi-feng, et al. Angle-measuring capacitive sensor with 4~20mA current output[J]. 2009, 28(11): 86-88. DOI: 10.13873/j.1000-97872009.11.032.
一种4~20mA电流输出的电容角度传感器
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
2
0mA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°
9
0°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/(°)。
Abstract
A new-style non-contact capacitive sensor for measuring angle is introduced.Through capacitance signal conversion integrated circuit CAV424 and voltage-current conversion interface circuit AM402
the angle variety of capacitive sensor can be converted into 4
2
0mA 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°