High Frequency Leakage Cable Anti-Intrusion Detector

Abstract

The invention provides a high frequency leakage cable anti-intrusion detector. The high frequency leakage cable anti-intrusion detector comprises a high frequency emission module, a high frequency removing module and a central control module. The first output end of the high frequency emission module is used for being connected with an emission leakage cable, and the second output end of the high frequency emission module is used for being connected with a multiplying unit of the central control module. The input end of the high frequency receiving module is used for being connected with a receiving leakage cable corresponding to the emission leakage cable, and the output end of the high frequency receiving module is used for being connected with a frequency selection network of the central control module. According to the high frequency leakage cable anti-intrusion detector, the local oscillation driving frequency is high and is normally twice that of the common detector, the wavelength of the high frequency driving frequency is half that of a medium frequency detector, and theoretically, the magnetic field range generated by disturbing signals is reduced by a half, so that a basis is provided for making narrow detectors; the narrow detectors can be used for wall installation and narrow perimeters, the defect that commonly-used medium frequency detectors are prone to misinformation in complex environments is overcome, and the service space of the leakage cable intrusion detection technology is expanded.

Description

technical field [0001] The invention relates to a leakage cable intrusion prevention detector, in particular to a high frequency leakage cable intrusion prevention detector. Background technique [0002] Leakage cable detection and intrusion detectors started in the 1980s in our country and have lasted for three generations in our country. The first generation is a pure analog circuit; the second generation is a single-chip microcomputer plus an analog circuit; the third generation is a digital signal processing plus an analog circuit. With the development of the times, the digital part of the detector system is constantly advancing, but the analog part of the system has not been able to keep up with the changes in the digital system, and has been stuck in place. The analog portion of the system limits the improvement in overall detector performance. [0003] The leakage cable anti-intrusion detector is mainly composed of a transmitting module, a receiving module and a cen...

AI Technical Summary

Problems solved by technology

For some scenarios where the perimeter width is less than 5 meters, it is easy to generate false alarms. Due to the large number of people and the lack of land, there are relatively many cases of narrow perimeters in my country, which affects the application of leaky cable intrusion detection technology to a certain extent.

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