Leaky cable perimeter intrusion detection system

Abstract

The invention relates to the field of radio detection and especially relates to a leaky cable perimeter intrusion detection system. The system is mainly formed by three portions: a detection system main machine, a leaky cable module and a terminal module. The detection system main machine comprises a carrier wave signal generation module, a pseudo random coding generation module, an emission signal synthesis module, a signal emission module, a signal reception module, a signal processing module, an information processing module, an alarm module, a display module, a power supply module and a lightning-protection module. The leaky cable module is provided with an emission cable and a reception cable. The terminal module is provided with two matched resistors. One end of the emission cable and one end of the reception cable are connected with the detection system main machine, and the other ends are connected with the terminal module. The leaky cable perimeter intrusion detection system is relatively-high in anti-interference capability, strong in imperceptibility, high in positioning accuracy and low in alarm missing rate and mis-alarming rate; and no interference is generated between adjacent equipment.

Description

technical field [0001] The invention relates to the field of radio detection, in particular to a leakage cable perimeter intrusion detection system. Background technique [0002] The perimeter intrusion detection system based on leaky cables is an application of radio in the field of detection. Chinese Patent No. 03209915.0, titled "Perimeter Intrusion Prevention System Based on the Principle of Radio Electromagnetic Field", discloses a system that uses leaky cables to detect the intrusion of foreign objects. The principle is the principle of radio electromagnetic field leakage, and the amplitude and phase of the signal in the detection channel are completed. The disadvantage of target detection is that it needs to be divided into sections of equal length along the entire length of the perimeter, and the total number of sections is an even number. In the same laying section of two cables, the sending module connected to the sending cable and the receiving module connected to...

AI Technical Summary

Problems solved by technology

Chinese Patent No. 03209915.0, titled "Perimeter Intrusion Prevention System Based on the Principle of Radio Electromagnetic Field", discloses a system that uses leaky cables to detect the intrusion of foreign objects. The principle is the principle of radio electromagnetic field leakage, and the amplitude and phase of the signal in the detection channel are completed. The disadvantage of target detection is that it needs to be divided into sections of equal length along the entire length of the perimeter, and the total number of sections is an even number. In the same laying section of two cables, the sending module connected to the sending cable and the receiving module connected to the receiving cable It is placed on both sides of the same laying section and cannot be placed in one place. Therefore, its installation and manufacture are complicated, its use cost is high, and its anti-interference ability is low; The detection performance of the system has been greatly improved, but the location of the intrusion target cannot be achieved alone, and interference is prone to occur when adjacent equipment is working

Images