基于液晶光电特性的静电测量  

Electrostatic measurement based on photoelectric effect of liquid crystal

作　　者：王耀强 谢飞 胡轶瑶 徐律涵 陈晓西 WANG Yao-qiang;XIE Fei;HU Yi-yao;XU Lv-han;CHEN Xiao-xi(School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China)

机构地区：[1]电子科技大学光电科学与工程学院,四川成都610054

出　　处：《液晶与显示》2021年第9期1255-1263,共9页Chinese Journal of Liquid Crystals and Displays

基　　金：四川省科技厅项目(No.2020yj0327)。

摘　　要：传统静电测量仪器存在成本高、精度低及使用复杂等难题,本文提出了一种利用液晶材料的光电特性进行静电测量的简易方法。测量所使用的液晶器件采用多层基板叠加分压结构,多层叠加基板的分压作用实现了对高压的测量和连续性测量。该静电测量装置可以实现高低压测量范围在器件的不同区域上同时测量。首先介绍了实现这种方法的器件和系统,然后基于外部输入已知变化电压模拟不同带电人体,通过理论分析和实验测试实现了液晶器件的标定,最后利用人体实际测量以及施加另一组已知变化电压计算测量误差。实验数据结果表明,液晶器件的测量误差不超过9%。基本满足静电测量的便捷、稳定可靠、精度高等要求。Traditional electrostatic measuring instruments have the disadvantages of high cost,low accuracy and complex operation.In this paper,a simple measurement based on the photoelectric effect of liquid crystal materials is proposed.The liquid crystal device has multiple layers of substrate.High and low pressure areas can be measured simultaneously.The device and system realizing this method are given in this paper.Then,the calibration of the liquid crystal device is realized by inputting the known variable voltage.Finally,the human body is used for the actual measurement and another set of voltage is applied to calculate the measurement error,which is calulated to be 9%.The measuring device mostly meets the requirements of convenience,stability and high precision of electrostatic measurement.

关 键 词：液晶器件 静电测量 电光效应 

分 类 号：O439[机械工程—光学工程] TN29[理学—光学]