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智能住宅小区综合运用了计算机技术、通信技术、控制技术等, 是由家庭智能控制系统、通信接入网、小区安全防范系统、小区物业管理服务系统和小区综合信息服务系统来支持实现的。目前方兴未艾的物联网技术因其各种特性, 引入到楼宇智能化技术中, 必将是一个重要的发展方向。
针对目前火灾发生的特点和现状，进行较为系统的需求分析，给出物联网下的楼宇安防系统的总体设计、功能模块设计与实现。本文设计了一种物联网下的楼宇安防系统，它主要是由AT89S52单片机、18B20温度传感器和MQ-2烟雾传感器组成。这个系统可实时监控楼道和房间的温度和烟雾等级，当监控的环境温度或者烟雾超过设计值时，系统会产生声光报警，及时提醒人们。即使当传感器发生故障，也可人为的按下紧急报警按钮，从而使人们早发现火灾。这个系统的是可以根据不同的环境设定所需要的报警值，同时具有价格低廉、易于安装等特点。
关键词：物联网 ；智能楼宇；安防系统；AT89S52单片机 ；传感器
ABSTRACT
The intelligent residential district uses the computer technology, the communication technology, the control technology and so on. It is composed of the home intelligent control system, the communication access network, the district security guard system, etc. The property management service system and the integrated information service system support the realization. The Internet of things technology, which is in the ascendant at present, is introduced into the intelligent building technology because of its various characteristics, it will be an important development direction.
According to the characteristics and present situation of fire, this paper makes a systematic demand analysis, and gives the overall design, function module design and implementation of building security system under the Internet of things. In this paper, a building security system based on Internet of things is designed. It is mainly composed of AT89S52 single-chip computer 18B20 temperature sensor and MQ-2 smoke sensor. This system can monitor the temperature and smoke grade of the corridor and room in real time. When the ambient temperature or smoke exceeds the designed value, the system will produce acousto-optic alarm. Remind people in time. Even when the sensor fails, you can manually press the emergency alarm button, thereby This system can set the alarm value according to different environment, and it has the characteristics of low price and easy to install.
Keywords: Internet of things; Intelligent Building; Security system AT89S52 single Chip Microcomputer; Sensor
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