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Cable shielding layer anti-theft alarm device used for power distribution network

A cable shielding layer, anti-theft alarm technology, applied in the direction of the electric alarm, etc., can solve the problem of cable shielding stripping, etc., to achieve the effect of simple structure

Active Publication Date: 2013-07-10
SHANGHAI MUNICIPAL ELECTRIC POWER CO +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the suburbs, most of the cables are laid directly in the way of direct burial, which brings opportunities for some criminals to steal the cables, and the cable shielding layer is often stripped.

Method used

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  • Cable shielding layer anti-theft alarm device used for power distribution network

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Experimental program
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Effect test

Embodiment

[0023] Such as figure 1 As shown, a cable shield anti-theft alarm device for distribution network includes a transmitter 1, a transmitting clasp 2, a receiving clasp 3, a receiver 4 and an alarm 5, and the transmitting clasp 2 and receiving The clasp 3 is installed on the outside of the cable, the transmitter 1 is connected to the transmitting clasp 2, and the receiving clasp 3 is connected to the receiver 4 and the alarm 5 in turn.

[0024] The transmitter 1 includes an AC power input port, a current rectification and filtering energy storage circuit 11, a damping oscillation circuit 12 and a signal generator 13, the described AC power input port is connected to a 220V AC power supply, and the damping oscillation circuit 12 The current rectifying and filtering energy storage circuit 11, the signal generator 12 and the transmitting snap ring 2 are respectively connected.

[0025] Described receiver 4 comprises preamplifier 41, digital band-pass filter 42, A / D converter 43, li...

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PUM

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Abstract

The invention relates to a cable shielding layer anti-theft alarm device used for a power distribution network. The device comprises a transmitter, a transmitting clamping ring, a receiving clamping ring, a receiver and an alarm, wherein the transmitting clamping ring and the receiving clamping ring are installed outside a cable, the transmitter is connected with the transmitting clamping ring, and the receiving clamping ring is sequentially connected with the receiver and the alarm. The transmitter transmits alternating current signals to the transmitting clamping ring in a certain signal break-make ratio, the alternating current signals are coupled to a shielding layer of the cable through the transmitting clamping ring, the receiving clamping ring receives the signals passing through the shielding layer and then sends the signals to the receiver, the receiver carries out amplification, filtering and A / D conversion processing on the received signals and judges whether the shielding layer of the cable is complete according to the received signals, if the shielding layer of the cable is complete, the signals are displayed, and if the shielding layer of the cable is not complete, the signals are displayed, an alarm signal is sent to the alarm and the alarm sounds an alarm. Compared with the prior art, the device has the advantages of being capable of achieving an anti-theft alarm function and a self-adaptation function, simple in structure, wide in application and the like.

Description

technical field [0001] The invention relates to a power grid monitoring device, in particular to an anti-theft alarm device for a cable shielding layer used in a power distribution network. Background technique [0002] In recent years, with the rapid development of urban industrialization, from power stations to urban and rural power grids, from power distribution rooms to factory streets, cable lines have been more and more widely used due to their unique characteristics, and play an overhead role in many occasions. The role that the line cannot replace. In the suburbs, most of the cables are laid directly in the way of direct burial, which provides opportunities for some criminals to steal the cables, and the cable shielding layer is often stripped. [0003] The so-called "shielding" on the cable structure is essentially a measure to improve the electric field distribution. The cable conductor is twisted by multiple guide wires. It is easy to form an air gap between it ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08B13/22
Inventor 张滕飞沈晨夏渊顾斌张志刚
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO
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