介绍了一种新型非接触式测量角度的电容传感器,这种传感器包含1个传导电信号并可影响电容值大小的旋转电极和2个用来发射接收电信号的固定电极,经后续放大电路的电信号处理,可由其输出变化电压值来测算出中间转子的转动角度,这种低造价的传感器的主要优点在于其可以在相对潮湿或者并不太理想的环境下使用｡实验结果表明其误差可控制在很小的范围内｡ Robust Capacitive Angular Sensor WANG Jia-xin,LI Xi-sheng (College of Information Engineering,University of Science and Technology Beijing,Beijing 100083,China) Abstract:Introduced a contactless capacitive sensor for measuring angular.The sensor is based on a passive rotating electrode placed between two mechanically static and electrically active electrodes. The main advantages of this low-cost system are its capability to operate at high temperatures and humidity as well as its insensitivity to vibrations, dirt, dew and moisture deposited on the three sensor electrodes. Experiments results from a prototype designed for the angular-measurement show a relative low error. Key words:contactless;angular speed;capacitive sensor