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传统的报警系统单纯利用各种报警器作为前端探测器,误报率较高。我们设计的视频报警系统是以摄像机为前端,采用先进的单片机控制技术和视频报警方式,将电视监控和防范报警有机地融为一体,从而有效地克服了探头报警易受环境影响的缺点。报警系统工作时,如果防范区域内有人侵入,就会引起预先设置在监视器上的隐形标志区内图像信号的幅度和对比度发生变化,当变化量超出设定的安全范围时,报警电路产生警笛声和闪光提示。视频报警方式使得摄像前端既能进行摄像,又具有报警功能,从而使该系统的防范作用不仅直观而且可靠有效。目前已广泛应用于工矿企业、公安保卫、银行等单位,取得了令人满意的效果。 视频报警系统包括单片机控制部分、视音频切换器、时间日期发生器、字符发生器、视频报警电路、通信、广播、供电等9部分。操作上由几十个触摸单键集中控制,单键上字符选用国际通用的ASCII码,并由程序设定操作密码,有利干专人使用和保管,信号的外理和传输
The traditional alarm system simply use a variety of alarm as a front-end detector, false alarm rate higher. We design the video alarm system is the camera as the front, the use of advanced microcontroller control technology and video alarm, the TV monitoring and prevention of alarm organically integrated, thus effectively overcoming the probe alarm vulnerable to the shortcomings of the environment. Alarm system work, if someone in the prevention zone intrusion, it will cause pre-set invisible on the monitor zone of the image signal amplitude and contrast changes, when the amount of change beyond the set safety range, the alarm circuit siren Sound and flash tips. Video alarm mode makes the camera front can both camera, but also has an alarm function, so that the preventive role of the system is not only intuitive and reliable. Has been widely used in industrial and mining enterprises, public security, banks and other units, and achieved satisfactory results. Video alarm system includes MCU control section, video and audio switches, time and date generator, character generator, video alarm circuit, communications, broadcasting, power supply and other 9 parts. Operation by the dozens of touch single-touch centralized control, single-key character selection of internationally accepted ASCII code, and set by the program operation password, the use of dry and beneficial staff, the signal handling and transmission