Multicore communication cable comprehensive tester

Abstract

The invention relates to a multicore communication cable comprehensive tester. The tester comprises a line-sequential test signal transmitter and a host. The tester is characterized in that the line-sequential test signal transmitter comprises a coding CPU and a code-sending circuit which is connected with the coding CPU and controlled by the coding CPU; the host comprises a decoding CPU, a code-receiving circuit, a fault range-finding signal transmitting / receiving circuit, a monitor and a keyboard; and the code-receiving circuit, the fault range-finding signal transmitting / receiving circuit, the monitor and the keyboard are separately connected with the decoding CPU, the code-receiving circuit adopts a low-speed AD chip, and the code-receiving circuit and the code-receiving circuit are provided with optocouplers which are separated from a cable to be tested. The tester of the invention has simple structure, low cost, high reliability and high anti-interference performance, and can be used to test long cables and be applicable to the connection and maintenance projects of various cables.

Description

technical field [0001] The invention relates to a cable testing device, in particular to a multi-core communication cable comprehensive tester which can simultaneously locate and mark both ends of a long-distance multi-core communication cable one by one and detect cable fault types and fault locations. Background technique [0002] In various connection and maintenance projects related to communication cables, construction and maintenance personnel often encounter problems caused by a large number of wires and cannot be distinguished when installing and repairing cables, and at the same time determine the type of cable fault and the fault The distance also increases the workload of construction and maintenance, slows down the work progress, and wastes a lot of manpower and material resources. At present, domestic related products are mainly limited to the fault point detection part. There is no manufacturer to develop and produce such comprehensive testing instruments. Such...

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Problems solved by technology

[0002] In various connection and maintenance projects related to communication cables, construction and maintenance personnel often encounter problems caused by a large number of wires and cannot be distinguished when installing and repairing cables. At the same time, determine the type of cable fault and the fault The distance also increases the workload of construction and maintenance, slows down the work progress, and wastes a lot of manpower and material resources

At present, domestic related products are mainly limited to the fault point detection part. There is no manufacturer to develop and produce such comprehensive testing instruments. Such products sold in the domestic market are all imported from abroad, and the price is very expensive. Among them, the model developed and produced by German BEHA company is The market price of this kind of product of 9016 is 592 US dollars. This product mainly adopts the principle of resistive voltage division. Its disadvantage is that the resistance value is easily affected by external conditions and cable length, which affects the accuracy of measurement and has poor anti-interference performance.

In addition, since the divided voltage signal is a DC signal, it is difficult to expand the function, and in use, a reference ground wire with good conductivity must be introduced, which makes it unnecessary in long-distance cable detection and maintenance. Trouble

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