热释电红外传感器在车辆计数系统中的应用  

Application of pyroelectric infrared transducer to the vehicle counting system

作　　者：张秀珍 戴伏生 毛兴鹏 

机构地区：[1]哈尔滨工业大学汽车工程学院,山东威海264209

出　　处：《传感器技术》2000年第2期47-49,共3页Journal of Transducer Technology

摘　　要：介绍一种以热释电红外传感器为检测部件的高速公路车辆自动计数系统。在本设计中的红外检测系统是采用新型热释电红外传感器作为探头 ,检测外界信息 ,并转换输出微弱的电信号 ,经运算放大器、比较器和防误触发电路后 ,滤去其他的干扰 ,最后所得信号驱动计数电路计数。整个系统具有性能可靠、灵敏度高、误操作率低、结构简单等特点。An automatic count system of expressway vehicle with the detecting unit of pyroelectric infrared trans ducer is introduced. The infrared automatic control system in the following design uses a new type thermoelectric infrared transducer as scanner, sensing outside information, and also transfering it into tender electronic signals, which will be magnified via arithmetic compidier, and contrasted by twin-limited contrast unit. At this time interference in the signals will be sifted by anti-interference circuit. And then the remaining signals are used to drive the counter to count. This system is really featured by reliable, high sensibility, low error operating rate, simple structure and so on.

关 键 词：热释电红外传感器 车辆计数系统 红外检测 

分 类 号：TN219[电子电信—物理电子学] TP212[自动化与计算机技术—检测技术与自动化装置]