新型门控系统的设计

针对传统门控系统无法实现实时视频监控和远程遥控开门的问题，作者设计了一种新型门控系统。该系统以STC12C5A60S2单片机为主控单元, 采用在Linux的开源环境-Openwrt下搭载mjpeg-streamer的方法实现远程实时查看视频，通过sim900A短信模块实现短信远程遥控开门。系统利用门铃按键和振动传感器结合人体红外传感器识别来访信息后，蜂鸣器发出声音提示同时短信模块向指定手机发送短信提示告知主人来访信息，主人可通过手机或PC端上网查看门外实时视频并可通过短信发送开门指令遥控开门。另外系统可通过光电传感器与人体红外传感器检测异常情况，当非正常时段有人且门被打开时，系统会发送警告短信，同时将门前状况以图像形式存在云盘中，实现防盗报警功能。经测试，该系统实现了实时视频传输、远程遥控开门及防盗报警功能；且平均单次运行时间为11.42S。系统反应迅速，性能良好，具有现实的应用价值。

Design of New gate controlling system

A new door controlling system is designed to solve the problem of the traditional door about failing to realize the user''s remote control and real time monitoring.The system uses the STC12C5A60S2 MCU as the main control unit, and via a short message remote control to open the door. The system adopts the method of mjpeg-streamer under Openwrt, an open source environment of Linux, to realize the function of remote real-time video viewing, and gates controlling through the sim900A short message module. The camera with human infrared sensor and photoelectric sensor can realize the dynamic monitoring of the environment outside the door of the household. Through the short message module, a warning message can be sent when the system detects an anomaly, meanwhile the front door status is stored in the cloud disk as an image. After testing, the system realized real-time video transmission, remote remote door opening and anti-theft alarm function; and the average single operation time was 11.42S.The system responds quickly, performs well, and has practical application value.