光纤周界安防系统端点检测技术的研究  

Study on endpoint detection technology based on fiber perimeter security system

作　　者：吴红艳[1] 贾波[1] 卞庞[1] 

机构地区：[1]复旦大学材料科学系,上海200433

出　　处：《仪器仪表学报》2013年第4期743-748,共6页Chinese Journal of Scientific Instrument

基　　金：973计划(2010CB327805);科技支撑计划(2011BAF06B01)资助项目

摘　　要：光纤周界安防系统是一种利用光纤作为传感介质的传感系统,通时计算机对传感系统的输出信号进行处理。以往的算法都是对计算机接收到的信号直接进行定位及模式识别处理,由于接收到的信号在大部分时间都是无用的静默信号,限制了系统的效率。在简单阐述光纤周界安防系统原理的基础之上,介绍了端点检测技术,有效截取信号中的有用目的信号,最后结合实验数据,着重分析了短时能量和短时过零率两种端点检测方法所存在的问题,并提出了相应的改进办法,滤除了无用信号,并在一定程度上排除了自然界中风和雨的干扰。Fiber perimete from detection sensor are r security system is a kind of sensor syst processed by computer. In the past, the position determination and pattern recognition. Because the em that uses fiber as the sensing media. The signals computer received signals are directly processed for received signal are useless silent signals in most of the time, which limits the efficiency of the system. Based on describing the principle of fiber perimeter security system, this paper introduces endpoint detection technologies, which effectively intercept useful signals in the received sig- nals. Short-term energy and zero-crossing rate methods as two kinds of endpoint detection technologies are intro- duced. With the experiment data, the problems as well as the solutions of the two methods are analyzed. The proposed methods filter out the useless signals and eliminate the disturbance of wind and rain in some degree.

关 键 词：光纤周界安防系统 短时能量 短时过零率 

分 类 号：TN911.74[电子电信—通信与信息系统]