Device and method for monitoring grounding performance of cable shielding layer based on complex impedance measurement

Abstract

The invention discloses a device and method for monitoring the grounding performance of cable shielding layer based on complex impedance measurement. Both the transformer and the measuring transformer are coupled to the ground wire of the shielding layer of the communication cable to be monitored; the shielding effectiveness monitoring terminal couples the excitation voltage signal to the ground wire through the current transformer, and the measuring transformer is used to receive the corresponding The response current signal is measured, and the amplitude and phase of the response current signal are measured, and then the amplitude and phase of the signal are fed back to the shielding effectiveness monitoring terminal. The shielding effectiveness monitoring terminal calculates the complex impedance of the cable shielding layer to the ground, and uploads it to the upper The upper computer judges the variation range of the complex impedance. If it exceeds the set range, it is judged that the shielding layer of the cable is aging, rusted or non-open circuit damage.

Description

technical field [0001] The invention relates to a method for monitoring the grounding performance of a communication cable shielding layer, in particular to a monitoring device and method for the grounding performance of a cable shielding layer based on complex impedance measurement. Background technique [0002] In the private network communication network, it is of great significance to effectively monitor the cable shielding layer. [0003] First, ensure the security of information. In wired communication, the cable shielding layer is used to effectively block the electromagnetic wave emission from the internal core to the surrounding environment, and the shielding layer's shielding effectiveness is based on the integrity and good grounding of the shielding layer itself. [0004] Second, ensure communication quality and reliability. Electromagnetic interference from outside the cable will affect the quality of voice communication and cause bit errors in data communicati...

AI Technical Summary

Problems solved by technology

[0010] In order to overcome the deficiencies of the existing methods for measuring the grounding resistance of the cable shielding layer, and the inadequacy of measuring the capacitance between the shielding layer and the core to detect the non-open circuit damage of the shielding layer, the invention provides the grounding performance of the cable shielding layer based on complex impedance measurement The monitoring device and method can measure the aging, corrosion and non-open circuit damage of the shielding layer by online measurement of the complex impedance of the shielding layer to the earth, so as to ensure the security of communication information and the reliability of communication quality

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