| Along with the rapid development of the society and economy as well as the continuously improving of the people's living standard,especially with the universality of the telephone and the rapid development and abroad application of microelectronics, the residential security to people is been more and more important. The security keeping away system of Smarthome is emerged as the times required. Now lots of plots have installed the intelligence alarm system, which enhance the plot safety g and keep the inhabitant's personal and property safety effectively.In this text, the development survey of security keeping away technology of Smarthome in the world is debated. According to the developmental direction of the technology overseas and the situations of our countries, we have researched and designed a kind of intelligent alarm system for SmartHome. It has the function of theft—proof, performing automatic detection and automatic dial. Pyroelectric infrared sensor is used for theft—proof so as to realize automatic detection. It is designed to make the least fail to alarm and false alarm and enhance the reliability of the system. When detector has detected any abnormality signals, an interrupt request will be sent to the MCU. Next the MCU control the interface circuit of telephone to accomplish simulated off-hook, then auto-dial by dial-up circuit of DTMF, and play the phonetic information which has been recorded beforehand by phonetic circuit, to tell the user of the emergency which has occurred, so that they can take corresponding step on time.In addition, the code validation has been intercalated in the system. Users can input and modify the code by keyboard. That build up the systemic security and stability.The system is based on a great deal of correlative experiments. it has been validated in hardware and software's emulation, so it has some definite practicability. As far as research and exploitation later, this has some definite referenced meaning. |
PDF Full Text Request