摘要
在基于泄漏同轴电缆的入侵探测定位系统中,为了提高定位精度并解决入侵相位带来的问题,提出了一种基于IQ正交解调的新颖定位方法。通过采用脉冲测距结合IQ正交解调技术,对接收到的回波信号进行处理,得到矢量回波的最大模值。根据这个最大模值确定出回波信号的时间延迟,获得入侵位置信息。实验结果表明,基于IQ正交解调的新颖定位方法可以消除入侵相位导致的误差,在任意入侵位置均可获得稳定的回波信号幅值,同时提高定位精度到0. 1 m。
For the intrusion detection and location system based on leakage coaxial cable,in order to improve the positioning accuracy and solve the problems caused by the intrusion phase,a novel positioning method based on IQ quadrature demodulation is proposed. By using pulse positioning and IQ quadrature demodulation technology,the received echo signal is processed to obtain the absolute value of the vector echo. Based on the time delay of absolute value of the echo signal,intrusion position information is obtained. The experimental results show that the new quadrature demodulation location method can eliminate the errors caused by the intrusion phase;it can obtain a stable echo signal amplitude at any intrusion position,at the same time,it can improve the positioning accuracy to 0. 1 m.
作者
何川侠
路宏敏
官乔
HE Chuan-xia;LU Hong-min;GUAN Qiao(Xidian University,Xi'an 710071)
出处
《中国电子科学研究院学报》
北大核心
2019年第1期93-97,106,共6页
Journal of China Academy of Electronics and Information Technology
基金
基于漏泄同轴电缆的周界入侵探测系统关键技术研究(中天科技校企横向合作项目)
关键词
漏缆传感器
相位误差
定位精度
正交解调
探测定位系统
LCX sensor
phase error
positioning accuracy
quadrature demodulation
detection and location system.
