Based on the principle of vibrating capacitor

an electrostatic sensor is designed.Design scheme of software and hardware working principle are introduced.The test results are given.This sensor effectively reduces measurement error and improves precision by using infrared position.The result can be directly show by LCD screen controlled by singlechip micyoco at the same time

the voltage polarity is displayed.The test data is analyzed

the results demonstrate that the sensor has good linearity at the range of-30～30 kV.It can meet the need of measuring the electrostatic field at this range.