热释电红外传感器及其在人员计数系统中的应用  

Pyroelectric infrared sensor and its application in people counting system

作　　者：易金桥[1,2] 黄勇[1] 廖红华[1] 谭建军[1] 姜胜林[2] 

机构地区：[1]湖北民族学院信息工程学院,湖北恩施445000 [2]华中科技大学光学与电子信息学院,湖北武汉430074

出　　处：《红外与激光工程》2015年第4期1186-1192,共7页Infrared and Laser Engineering

基　　金：国家自然科学基金(61261016;61263030);中小企业科技创新基金(12C26214204505);湖北省自然科学基金(2013CFB044)

摘　　要：针对图像采集人员计数系统复杂、价格昂贵等缺点,在分析热释电效应以及红外传感的基础上,采用BISS0001型信号处理专用集成芯片设计了基于RE200B热释电红外传感器的放大电路,研究其在不同人体运动状态下的输出波形;设计了以双热释电红外传感器为信号采集单元,以CortexM3单片机为控制核心的人员计数系统,并研究其主要算法。实验结果表明,RE200B型热释电红外传感器的输出波形能够准确表征人体的不同运动状态,基于双热释电红外传感器的人员计数系统能准确分辨人体的运动方向,并实时计数,可广泛应用于人体探测和人员计数等领域。People-counting systems for image acquisition are usually complicated and expensive. In this paper, with detailed analysis of the pyroelectric effect and infrared sensor, BISS0001 integrated signal processing chip were chosen to design an amplifier circuit for the RE200 B pyroelectric infrared sensor, in order to study its output waveforms under various human movement states. A people-counting system was designed, with double pyroelectric infrared sensors as the signal acquisition unit and a Cortex-M3 microcontroller as the control core, and its main algorithms were researched. The experimental results demonstrate that different body movement states can be accurately characterized using the output waveforms of the RE200 B pyroelectric infrared sensor and the movement directions can be precisely distinguished by the people-counting system based on double pyroelectric infrared sensors designed in this paper. Furthermore, the system realizes real-time counting, and can be applied to a wide range of areas including human body detection and counting.

关 键 词：热释电效应 红外传感 人员计数 RE200B CORTEX-M3 

分 类 号：TH744[机械工程—光学工程]