Cable shielding layer grounding performance monitoring device and method based on complex impedance measurement

Abstract

The invention discloses a cable shielding layer grounding performance monitoring device and method based on complex impedance measurement. The device comprises an upper computer. The upper computer is connected with a shielding efficiency monitoring terminal. The shielding efficiency monitoring terminal is connected with a current transformer and a measurement mutual inductor. The current transformer and the measurement mutual inductor are respectively coupled to a grounding wire of a communication cable shielding layer to be monitored. The shielding efficiency monitoring terminal couples an excitation voltage signal to the grounding wire through the current transformer. The measurement mutual inductor is used for receiving a corresponding response current signal, measuring the amplitude and the phase of the response current signal and further feeding the amplitude and the phase of the response current signal to the shielding efficiency monitoring terminal. The shielding efficiency monitoring terminal calculates the complex impedance of the cable shielding layer to the ground and uploads the complex impedance to the upper computer. The upper computer judges the change range of the complex impedance and determines that the cable shielding layer is aged, corroded or damaged in a non-open-circuit type if the change range of the complex impedance exceeds a set range.

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 cable shielding layer grounding performance monitoring device and method 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] One is to 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 effect of the shielding layer is based on the integrity of the shielding layer itself and good grounding. [0004] The second is to ensure communication quality and reliability. Electromagnetic interference from outside the cable will affect the quality of voice communication and cause bit errors in data communication. While t...

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

Images