TMS320LF2407-based Testing System for Liquid Crystal Materials

摘要：

The real-time dynamic measurements of the electronic parameters of the liquid crystal is very important to obtain its continuous response characteristic and failure mechanisms. The conventional testing devices can measure only one transient parameter at each time instant. In this paper,the high speed processing power of DSP chip TMS320LF2407 is used for dynamic measurement. The FFT cycle integral sampling under the frequency continuous variation status is realized via real time frequency track. Combining the continuous adjustable high voltage AC signal source,the liquid crystal frequency and amplitude response characteristics and its failure mechanism are investigated. The least square fitting method is used to correct dynamic measuring error. Experimental results shows that the developed system possesses fast calculation and strong signal processing capability.

关键词： TMS320LF2407 Real time frequency track. Liquid crystal failure mechanism Least square.

作者: Meng Gao Yanhui Shi Huaping Liu Fuchun Sun

作者单位: Shijiazhuang Railway Institute Shijiazhuang China 050043 Department of Computer Science and Technology,Tsinghua University Beijing China 100084

会议类型: 国际会议

会议名称: 2009 9th International Conference on Electronic Measurement & Instruments(第九届电子测量与仪器国际会议 ICEMI2009)

会议地点: 北京

会议语种:英文

页码: 1407-1409

在线出版日期: 2009-08-16（万方平台首次上网日期，不代表论文的发表时间）