基于CAV444的无接触式电容角度传感器  

Contactless Capacitive Angle Sensor Based on CAV444

作　　者：秦玉伟[1] 胡涛成 QIN Yuwei;HU Taocheng(School of Physics and Electrical Engineering,Weinan Normal University,Weinan 714099,Shaanxi China;School of Electrical Engineering and Automation,Tiangong University,Tianjin 300387,China)

机构地区：[1]渭南师范学院物理与电气工程学院,陕西渭南714099 [2]天津工业大学电气工程与自动化学院,天津300387

出　　处：《河南科学》2021年第1期37-41,共5页Henan Science

基　　金：陕西省国际科技合作与交流计划项目(2017KW-032);陕西省工业攻关项目(2016GY-117);渭南市科技局重点研发项目(ZDYF-JCYJ-100)。

摘　　要：针对传统的差动式电容角度传感器的线性度不高和测量精度低的缺陷,设计了一种新型的无接触式电容角度传感器.通过CAV444芯片把该传感器的电容变换量转换成差分电压输出,经过放大电路处理后,经A/D转换,利用单片机读取与角度相对应的电压值.实验结果表明,该电容角度传感器实现了对角度的精确测量,能够得到线性输出的电压值.A new contactless capacitance angle sensor was designed to resolve the shortcomings of traditional differential capacitance angle sensor,such as low linearity and measurement accuracy. The capacitance conversion of the sensor was converted into differential voltage output by CAV444. And then processed by amplifying circuit and A/D converter,the voltage value corresponding to the angle was get by single chip microcomputer. The experimental results show that the sensor can reach the accurate measurement of the angle and get the linear voltage output.

关 键 词：CAV444 电容传感器 角度 差分电压 

分 类 号：TH712[机械工程—测试计量技术及仪器]