Cable antitheft system and corresponding cable antitheft method

Abstract

The invention discloses a cable antitheft system and a cable antitheft method. The cable antitheft system comprises an antitheft control unit and an antitheft terminal unit. The antitheft control unit includes a master control module, a main communication module connected to the master control module, an AC detection module connected to the master control module and a cable and used for detecting whether alternating currents exist in the cable, and an impedance test module connected to the master control module and the cable and used for collecting impedance information of the cable. The antitheft terminal unit includes: a terminal control module; a terminal communication module, which is connected to the terminal control module and communicates with the main communication module through electric carrier waves; and a voltage detection control module, which is connected to the terminal control module, a live line of the cable and a null line of the cable, and adjusts the impedance and the voltage of the cable. Cables across a road can be monitored all day, the system is simple in structure, and false alarm and other problems of all antitheft devices are solved.

Description

technical field [0001] The invention belongs to the technical field of cable anti-theft, and in particular relates to a cable anti-theft system based on the combination of impedance testing and PLC communication and a corresponding cable anti-theft method. Background technique [0002] I believe that people in the market are no strangers to cable anti-theft devices. There are a series of anti-theft devices such as video anti-theft, wireless communication anti-theft, current measurement anti-theft, power carrier (PowerLineCarrier, PLC) anti-theft and so on. [0003] The wireless anti-theft mode has certain defects in the distance. The longest distance of the existing wireless anti-theft circuit can only reach within 500m, and it is interfered by the wireless signals in the air, which makes the signal transmission not smooth, and it is easy to cause false alarms. Phenomenon. And in the absence of an AC power supply module, the terminal needs to output a DC power from the powe...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the above-mentioned technical defects existing in the prior art, the present invention provides a cable anti-theft system based on the combination of impedance test and PLC communication and a corresponding cable anti-theft method, which overcomes the low sensitivity of long-distance transmission signals and frequent false alarms , low safety performance of DC power supply and other shortcomings, it can realize accurate judgment and low false alarm rate

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