Hand-held cable continuity test device and system and test method for rail vehicle

Abstract

The invention provides a hand-held cable continuity test device for a rail vehicle. The bus switch module (A) of the device is provided with a cable end. The contacts of A are connected with an idle bus and a test bus respectively. Each bus is connected with a grounding end through the contacts of grounding switch modules (B). Drive and grounding ports are arranged. Each switch module is providedwith an enable end and contacts. The slave device of the system comprises the hand-held cable continuity test device, control and communication modules, a power supply, a power supply switch module (C) and a voltage measurement circuit. The power supply is connected with the test bus through the contacts of C. The control module is connected with the drive. The enable end is connected with contacts and the drive. Short circuit and continuity test is carried out on a connected first cable. A master device determines a corresponding test result. Next cables on the same A are tested in reverse order until the last one. The test comprises the steps that the master device sends a test signal to the slave device; and the slave device controls the contact action of the slave device, and notifiesthe master device to control the contact action after switching. The test result is determined according to voltage. The volume is small, and the speed is fast.

Description

technical field [0001] The invention relates to the field of line testing, and more particularly, to a hand-held cable conduction testing device, system and testing method for rail vehicles. Background technique [0002] Today, the EMU has become the protagonist of my country's Wanli Railway Line. The cables of the whole vehicle are criss-crossed inside each depot of the EMU, and play a key role in the power operation and communication transmission of the EMU. Their performance directly determines the safety of the EMU operation. [0003] After the EMU wiring is completed, in order to ensure the reliability of the cable, it is necessary to conduct a continuity test on the cable, including the conduction resistance of the cable and whether there is a short circuit between the lines. The electrical circuit conduction test is the main process of the vehicle circuit test. The circuit conduction test is used to check whether the wiring is correct. It is a very important test ite...

AI Technical Summary

Problems solved by technology

[0004] At present, the main solution is to manually use the sounder to check the cables one by one and point by point. This method is inefficient and less accurate; another method is to use the instrument used for the continuity test of aircraft cables. The instrument used in this method is used for large-scale cable conduction testing, which can test thousands of cables at the same time, but the equipment is large in size, high in cost, complicated in principle and wiring, and is not suitable for each socket in the train compartment loose wire test

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