防盗报警系统中话线断线呼救无线网的研究与应用  

Research and application of distress radio call system in case of line break about burglar alarm system

作　　者：李小伟[1] 潘永雄[1] 杜小伟[1] 

机构地区：[1]广东工业大学物理与光电工程学院,广东广州510006

出　　处：《电子设计工程》2010年第5期125-128,共4页Electronic Design Engineering

摘　　要：针对借助固定电话通信的防盗报警器在话线遭到破坏情况下,无法将警情送达接警中心或用户手机的现象,提出一种电路简单、通信可靠、占用信道时间短、成本低廉的话线断线无线呼救系统。给出完整的硬件电路,其中包括话线断线与摘机检测电路,ASK调制的无线发射电路,以及断线呼救与应答信息的构成、通信协议,并详细描述呼救信息发送、接收处理流程。实验证明,该无线呼救系统极大地提高借助固定电话通信的防盗报警器的可靠性,使其误报率降低了50%,漏报率降低了30%。The paper introduces a distress radio call system of reliable communication,simple circuit,low cost and occupying signal path with short time, when the alarm can＇t be sent to police reporting center or the user telephone by the burglar alarm system resorting to telephonic communication in case of telephone line break. The integral hardware circuit is given., including line break detection circuit,off-hook detection circuit and the modulatory ASK radio-transmission circuit. The constitution and communication protocol of line-breaking distress call and response message are researched. The flow path of the distress signal＇s sending and acceptance is described in detail. The experimental results show that the burglar alarm system＇s reliability resorting to telephonic communication is boosted immensely. The error probability is decreased by 50% and the miss probability is decreased by 30%.

关 键 词：单片机 防盗报警 无线通信 编码 解码 

分 类 号：TP277[自动化与计算机技术—检测技术与自动化装置]