The Family Security Alarm System Based On Embedded System Design

With the continuous development of society and the advancement of the science and technology, people are on the threshold of a new era in communication, network,internet of things, and the information home appliances. The level of people’s life is more and more yearning to be intelligent, digital and enjoyable, the quality of people’s life is continuous improved, so the property of family and the importance of household security also enhance unceasingly. After research we found that: the ordinary household anti-theft mode mainly uses the traditional window and door, although these security model has a certain effect, but there is still risk; on the other hand, family security alarm system on the market is easy to appear misinformation alarm because the small animals enter or wind blows, or as a result of anti-theft alarm time delay, so we can’t catch the suspect or cause property damage, etc. Thus, the demand of the high degree of intelligent anti-theft system becomes urgent, because this system can timely find relevant alert information, further timely give the right way to handle it, so as to improve the safety of the household.This paper is to design a small beautiful suitable intelligent anti-theft products for family use, the core control module will drive the sound and light alarm immediately when it receives the infrared sensor or the temperature signal detected by the human body. At the same time, the core control module controls the GSM communication module to send alarm SMS to owner’s phone pre-stored, so the intelligent security alarm realizes.This system adopts the modular design thinking, mainly including the following functional modules: information collection module, the core control module, GSM communication module, sound and light alarm module and peripheral function module,etc. The whole principle process is based on AT89S52 single chip microcomputer as the core control module, and uses the SW- 18010 P sensing device as the related sensor collection device. When these signals are collected by sensing device, they can be passed to the MPU(microprocessor) module furthermore, and then when the control panel receives the alarm signal it immediately launches the acousto-optic alarm system,at the same time the GSM control module TC35 sends alarm messages to the owner’s phone, so as to realize intelligent alarm. The software construction is mainly based onmodular technology, the core module controls every different modules. Because of the combination of software and hardware system, so the system adopts both the assembly language and C language programming ideas.This paper completed the entire hardware and software design of the security alarm system, because of the time, I did a lot of work in the hardware design, completed the minimum system circuit design, the circuit design of front-end early-warning information acquisition, the core control module and the hardware design of a wireless transmission. After software compilation and combining software and hardware debugging, the system can work normally, and ensure that this alert report system has several important attributes: stable, practical and real-time. And adopting modular design also helps to improve the system scalability and versatility, and can adapt to different environment.