基于热释电红外传感器微弱信号处理电路的设计与分析  

Design and Analysis of Weak Signal processing Circuit Based on Pyroelectric Infrared Sensor

作　　者：魏丽君[1,2] 唐冬梅[1] 肖辽亮[2] 

机构地区：[1]中南大学地球科学与信息物理学院,湖南长沙410083 [2]湖南铁道职业技术学院电气工程系,湖南株洲412001

出　　处：《仪表技术与传感器》2013年第7期89-91,共3页Instrument Technique and Sensor

摘　　要：微弱信号处理一直是传感器应用电路中一个棘手的热点问题[1]。信号提取的重点则是如何对特定频率的微弱信号实现有效的提取并放大[2-4]。文中通过对热释电红外传感器[5-6]探测器出来的信号进行分析,结合设计要求,经过严格的参数计算,对整个信号处理电路进行了合理的分级设计[7],经测试,电路具有良好的选频特性和滤波效果,具有最佳的平坦特性[8],实现了微弱信号的精确放大[9-10]。Weak signal processing is a thorny issue in sensor application circuit. Signal extraction of focus is how to achieve ef- fective specific frequency weak signal amplification and extraction. This paper analyzed the pyroelectrie infrared sensors detector out signals, according to the design requirements, through the strict parameters, realized the signal processing circuit for a reasonable grading design. The testing results show the circuit has good frequency selection characteristic and the effect of the filter, and has the best flat characteristic, achieves the accurate weak signal amplification.

关 键 词：热释电红外传感器 信号处理 微弱信号放大 

分 类 号：TP334.3[自动化与计算机技术—计算机系统结构]