针对目前人们对安防报警产品需求日益增加,安防产品也相继出现,但其前端探测设备大都有各自的弊端,研究了一种可靠的人体入侵探测系统,很好地解决了传统探测器误报、漏报、防破解、隐蔽性差等一系列问题.系统是基于生物体自身特有电场会对已存在的稳定电场产生干扰这一特性,通过施密特触发器和功率放大电路产生稳定的电场,一旦人体接近此电场,系统立刻接收到入侵信号,经过对入侵信号的调理放大,正交信号检测,特征信号的提取,并结合智能化算法,最终产生有效的、可靠的报警信号.经拷机测试证明:系统具有抗干扰强、超低误报率、无漏报现象存在以及无法破解等优良性能,非常适用于安防报警系统的前端探测设备上.%There are many security products appear in succession, aiming at current increasing demand of security alarming products, however, most of the front-end detecting equipment has its own disadvantages, a reliable human invasion detecting system is studied, which can solve a series of problems such as misinformation rate, cracking and worse concealment. This system is based on the characteristic that an organism has its own electric fields which will interfere with stable electric fields that already exists, stable electric fields is generated by Schmitt-toggle and power amplifier circuit, once human gets close to the electric fields, system receives invasion signal immediately. After conditioning and amplifier the invasion signal, orthogonal signal detection, feature signal extraction, combined with intelligent algorithms, at last valid and reliable alarming signal is generated. Through test, the system is proved to have good performance such as strong anti-interference, ultra low false alarm rate, non-omission exist and unable to crack, and so on, which is well applied for front-end detecting of security alarm system.
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