›› 2012, Vol. 25 ›› Issue (12): 86-.

• 论文 • 上一篇    下一篇

一种基于路灯补偿电容的电缆防盗系统设计

王敏,刘凯,黄白   

  1. (广州海格通信集团股份有限公司 网通分公司,广东 广州 510663)
  • 出版日期:2012-12-15 发布日期:2013-02-28
  • 作者简介:王敏(1982—),男,硕士研究生。研究方向:嵌入式系统的开发。刘凯(1981—),男,硕士研究生。研究方向:嵌入式系统的开发。黄白(1982—),男,硕士研究生。研究方向:WLAN的开发。

Design of a Cable Anti-theft System Based on the Street Light Compensation Capacitor

WANG Min, LIU Kai, HUANG Bai   

  1. (Netcom Branch,Guangzhou Haig Communications Group Co.,Guangzhou 510663,China)
  • Online:2012-12-15 Published:2013-02-28

摘要:

提出了一种通过测量照明线路补偿电容变化,来监测电缆是否被盗的新型电缆防盗报警系统设计方案。目前的照明路灯均具有较大的补偿电容,因此电缆上的电容将随电缆长度的变化而呈现规律性变化。新型系统正是基于以上原理测量电容值,通过AT89C51单片机计算分析精确定位出被盗位置,并通过语音芯片ISD25120,拨号芯片MT8888在电话上自动报警。在实际应用中,具有良好的报警效果。

关键词: 电缆防盗, 双音多频, 语音芯片, 单片机, 自动报警

Abstract:

A new design of guarding against burglary of electric cables based on monitoring the variety of capacitance of the lamps on the road is introduced in this paper.Nowadays the lamps on the road usually have large compensated capacitance,so the capacitance of the cable will change with the length of the cable.The new system is based on the rule above to measure the capacitance to find the exact position where the stealing happened by the use of the single chip AT89C51.Voice chip ISD25120 & dialing chip MT8888 are used to give an alarm on the telephone line automatically.

Key words: cable guard;DTMF;voice chip;singlechip;autoalarm

中图分类号: 

  • TP277