Multi-core cable long distance distinguishing method

Abstract

The invention discloses a multi-core cable long distance distinguishing method which uses a 'resistor-cable connector' produced by a test resistor m=10k, is capable of being used repeatedly after one time production and suitable for all the common cable tests. The multi-core cable long distance distinguishing method is capable of combing knowledge related to electricity with mathematical knowledge, actually solving the practical problem during engineering, and efficiently and fast achieving identification and wire connection through popularization and use of the method.

Description

technical field [0001] The invention belongs to the technical field of construction and relates to a long-distance discrimination method for multi-core cables. Background technique [0002] Under coal mines or in construction roadways, long-distance multi-core cables are often laid for communication or control. Sometimes it is unreliable to only rely on the color identification of the cable core, and it may even be misjudged or misconnected. For example, when connecting communication cables in a coal mine roadway, there is such a problem: a certain signal line at the equipment side is blue, but it is found to be brown through repeated inspections at the control room side. In practice, there will be joints in the middle of hundreds of meters of cables, and it is possible that the two ends of the same core wire have different colors. Sometimes the distance between the two ends of the cable is relatively long, and there are spacers in the middle. For example, one end of a com...

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Problems solved by technology

For example, when connecting communication cables in a coal mine roadway, there is such a problem: a certain signal line at the equipment end is blue, but at the control room side, it is found to be brown through repeated inspections.

[0003] In the prior art, the multi-core cable discrimination test method is as follows: figure 1 Shown: A group of people short-circuit any two core wires at one end, short-circuit "1" and "2" on the left side of the cable, and another group of people at the other end, as shown figure 1 On the left side of the medium cable, use tools such as a multimeter to find the two ends of the short circuit. It is time-consuming to find it blindly, and both ends require personnel. It is very inconvenient to communicate with each other by shouting or using the phone.

The traditional method is cumbersome. If the distance is long, you have to contact each other by phone, which is easy to make mistakes and takes a long time

When wiring cables in a roadway without communication signals, because the construction personnel at both ends of the cable cannot get in touch, the wiring becomes inconvenient and difficult

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