Cable theft-proof monitoring system based on passive carrier communication

Abstract

The invention discloses a cable theft-proof monitoring system based on passive carrier communication. The system comprises a main control unit and a feedback unit which are connected with a cable; the main control unit comprises a power module, a processor, a pulse demodulator, an anti-interference pulse integrator, a carrier pulse receiver, an energy pulse generator and a modulation transmitter; and the feedback unit comprises an energy pulse receiver, a carrier pulse generator, a rectifier filter, a charging capacitor bank, a charge and discharge control module, a carrier frequency modulation generating module and a data code generating module. The feedback unit of the system has a passive structure, the working energy of the feedback unit is from energy pulse signals of the main control unit and does not require any external power supply, and the feedback unit controls charge and discharge of the charging capacitor bank by adopting the charge and discharge control module and can periodically send carrier pulse signals with ultrahigh power under the low power consumption environment of a circuit, so that high enough signal-to-noise ratio is ensured.

Description

technical field [0001] The invention belongs to the technical field of cable anti-theft, and in particular relates to a cable anti-theft monitoring system based on passive carrier communication. Background technique [0002] With the prosperity and development of the national economy, the pace of urban modernization is getting faster and faster, which has led to the rapid development of municipal construction. Correspondingly, road lighting construction, which is one of the important factors of urban image, has also achieved unprecedented development. Urban lighting and landscape lighting not only make the city brighter and more beautiful, but also make great contributions to economic prosperity, social stability, and enriching the night life of the masses. However, with the development of the city, the safety problem of urban lighting facilities has become more and more prominent, the phenomenon of theft has been repeatedly prohibited, and the difficulty of management is be...

AI Technical Summary

Problems solved by technology

This product switches between two measurement methods with power on and off. The structure is complex, and the fault and false alarm rate are also relatively high. Another solution is to install a battery pack at the communication end. When there is power AC on the cable, the power carrier communication method is used. , judge whether the communication on the cable is normal to detect the on-off of the cable; when there is no power AC on the cable, the power carrier communication detection is completed by the battery pack; but the power of the carrier pulse signal sent by the battery is low, which makes the line signal noise Smaller ones are more likely to cause false alarms, and the battery maintenance costs are high and the volume is too large

Images