摘要
目前应用于照明领域中的热释电红外传感器的信号处理主要采用模拟技术处理方案,模拟技术处理中存在容易误动作、灵敏度低、检测距离一致性差等缺点。为此提出了一种新的技术方案:PIR传感器信号数字化处理检测方案。首先对PIR传感器输出信号进行预置放大处理,然后由单片机模块完成AD转换、数字滤波、智能鉴幅等操作而获得数字信号,并对周围环境温度进行实时检测以实现对增益的自适应调节。经多次测试,该数字PIR传感器可对10m范围内的行人进行有效检测,具有可靠性高、抗干扰能力强、成本低等优点。
Present signal processing of the Pyroelectric Infrared Radiation used in the field of illumination mainly applies the solution of analog technology.The analog technology has some disadvantages such as malfunction,low sensitivity,poor consistency of detection range,and so on.Hence,a new technical solution is proposed：The solution of digital processing of the PIR sensor output signal.This proposed solution first amplifies the output signal of PIR sensor,and then proceeds to complete operations such as AD conversion,digital filtering and intelligent amplitude discrimination.In the meantime,it detects the ambient temperature in order to realize self-adaption of the transmission gain.After these tests,the digital PIR sensor can effectively detect pedestrians within 10 meters,and possess the advantages of high reliability,strong anti-interference ability,low cost,etc.
出处
《湖北工业大学学报》
2016年第4期65-69,共5页
Journal of Hubei University of Technology
关键词
PIR
模拟技术
数字滤波
自适应调节
PIR
analog technology
digital filter
adaptive adjustment
