A detection cable theft alarm device and alarm method

Abstract

The invention discloses an alarm device for detecting cable theft and an alarm method; the device comprises a main engine and a terminal, the main engine is installed at the beginning of a power supply line, and the terminal is installed at the end of the power supply line, and the main engine and the terminal are installed at the end of the power supply line. Communication between the terminals is carried out through cables. In the state of AC power supply, the terminal generates a pulse signal with a characteristic amount according to the set time. If the host can detect the pulse signal, it proves that the cable is normal. If the host cannot detect When the pulse signal is reached, it proves that the cable is stolen; in the case of power failure, the host supplies power to the terminal through the cable, which is similar to the AC power supply state, and the host detects the DC pulse sent from the terminal to determine whether the theft has occurred; The pulse detection method with characteristic quantity can accurately determine whether the cable is stolen, reduce the false alarm rate, and improve the alarm accuracy and timely rate.

Description

technical field [0001] The invention relates to the technical field of cable automatic control, in particular to an alarm device for detecting cable theft and an alarm method. Background technique [0002] With the prosperity and development of the national economy, the pace of modern infrastructure construction is getting faster and faster, and road lighting construction has also achieved unprecedented development. The vast majority of street lamp cables in my country use copper core wires. Due to the sharp rise in copper prices in the market in recent years, especially road lighting cables in rural areas and remote areas have been stolen seriously, which has brought immeasurable economic losses to the country and residents. The frequent theft of lighting cables not only causes huge economic losses, but also may cause many traffic accidents and public security chaos. The exposed wire ends with electricity will threaten the lives of passers-by; it will seriously affect the i...

AI Technical Summary

Problems solved by technology

[0007] (2) Using lithium batteries, the post-maintenance work will increase

Lithium batteries have a certain number of charge and discharge cycles and require regular maintenance, which increases the maintenance work after product installation

[0008] (3) Anti-theft detection under "(5) power failure state: 5) Anti-theft detection under power failure state: in the state of power failure of the detected circuit, set the communication cycle ΔT2 between the main control module and the end module, if the master If the control module sends a handshake signal and fails to receive the confirmation signal from the terminal module, the alarm will be triggered if the cable is stolen.” This detection has no problem in theory, but it cannot be ruled out that the terminal does not work due to a dead battery.

Therefore, the detection result is unreliable in the power failure state

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