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Online monitoring and evaluation method and system for shielding effectiveness of shielding layer of communication cable

A communication cable and shielding effectiveness technology, applied in the field of on-line monitoring and evaluation of the shielding effectiveness of the shielding layer of the communication cable, can solve the problems such as the limited amount of information on the status of the bearing cable, the inability to judge the grounding condition of the cable shielding layer, and the large error, so as to facilitate line maintenance and Maintenance, increase effective measurement length, save labor cost

Active Publication Date: 2019-01-01
康威通信技术股份有限公司
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Problems solved by technology

However, because the capacitive signal is too single and the amount of information on the status of the carrying cable is limited, it is difficult to locate and analyze the cable in a complex environment.
At the same time, due to the mismatch of the input impedance of the transmission line in the signal source, the measurement accuracy is low and the error is large
In addition, this method cannot accurately estimate the attribute information such as the length of the cable and whether the characteristic impedance of the cable changes.
[0005] The prior art provides a method for evaluating the status of the cable shielding layer by monitoring the power of the frequency-sweeping reflected signal, but on the one hand, the evaluation of the shielding effectiveness of the cable shielding layer is not comprehensive enough, and it can only be judged whether the cable shielding layer is damaged or not. The grounding condition of the cable shielding layer; on the other hand, when the fault of the cable shielding layer is judged by measuring the power, the fault location cannot be directly realized
[0006] The static full shielding method of the communication cable disclosed in the prior art can realize the static full shielding of the cable shielding layer during the cable deployment process, but cannot realize the dynamic monitoring of the shielding state

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  • Online monitoring and evaluation method and system for shielding effectiveness of shielding layer of communication cable
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  • Online monitoring and evaluation method and system for shielding effectiveness of shielding layer of communication cable

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[0048] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0049]It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0050] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or co...

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Abstract

The invention discloses an online monitoring and evaluation method and system for the shielding effectiveness of a shielding layer of a communication cable. The method comprises: on the basis of a cable segmented frequency sweeping measuring method, fault identification and positioning of a cable shielding layer are carried out; with a loop impedance measurement method, the state of a grounding resistor of the cable shielding layer is determined; comprehensive analysis and reverse evaluation of the shielding effectiveness of the cable are carried out by using an algorithm. According to the invention, reasonable quantitative evaluation of the shielding effectiveness, which can not be evaluated easily in the prior art, of the shielding layer of the communication cable is realized; and a problem of the safety field of the communication cable shielding is solved. Meanwhile, with measurement of various cable physical parameters, systematic, holistic and complementary evaluation of the cableshielding layer is realized.

Description

technical field [0001] The invention belongs to the technical field of communication cable shielding, and more specifically, the invention relates to an online monitoring and evaluation method and system for the shielding effectiveness of a communication cable shielding layer. Background technique [0002] Communication cables refer to cables used for short-distance audio communication and long-distance high-frequency carrier digital communication and signal transmission. They are widely used in communication line transmission, instrumentation, electric power and other important fields. Usually, communication cables have a shielding layer, which enhances the mechanical strength of the cable on the one hand, and plays the role of shielding electromagnetic signals on the other hand, so as to ensure the information security of line communication. In the field of communication, especially in applications with high requirements for information security, it is usually required to ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R29/08
CPCG01R29/0835
Inventor 杨震威杨东合孔得朋
Owner 康威通信技术股份有限公司
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