Antitheft alarm system based on radio-frequency relay communication

一种基于射频接力通信的防盗报警系统

Abstract

本实用新型涉及一种大面积区域内的防盗系统,该系统包括传感器子机和报警主机两部分。传感器子机利用超再生无线信号发出报警信号,报警主机接收到超再生无线报警信号后通过GSM网络拨打相关人员手机及发送报警短信,也可以驱动声光报警器。由于超再生无线信号的发射距离只有几百米,因此传感器子机采用接力通信的方式,即每个传感器子机既可以发送超再生报警信号,又可以传递相近的子机发送的超再生信号,当超再生信号传送到报警主机的接收范围内时报警主机便可响应传感器子机的报警信号。本实用新型利用小功率开放无线频段和接力通信方式,实现了报警信号的远距离无线传送,以达到大面积区域内防盗报警的效果。
The utility model relates to an antitheft system in a large area. The system comprises two parts, namely sensor submachines and an alarm host-machine. The sensor submachine sends an alarm signal by the utilization of a superregeneration wireless signal; and the alarm host-machine receives the superregeneration wireless alarm signal and then dials the mobile phone of related personnel and sends an alarm text message through a GSM network, and also can drive an audible and visual alarm. As transmitting distance of the superregeneration wireless alarm signal is only hundreds of meters, the sensor submachines adopt a relay communication mode. That is to say, each sensor submachine can send a superregeneration wireless alarm signal and also can transmit a superregeneration signal sent by a close submachine. When the superregeneration signal is sent to a receiving range of the alarm host-machine, the alarm host-machine can respond to an alarm signal of the sensor submachine. By miniwatt open wireless frequency band and relay communication, long-distance wireless transmission of an alarm signal is realized so as to achieve the effect of antitheft alarm within a large area.

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