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

A technology for rail vehicles and continuity testing, which is used in measuring devices, measuring electricity, measuring electrical variables, etc., and can solve problems such as large size, low efficiency, and complicated principles and wiring.

CN107907779AActive Publication Date: 2018-04-13CRRC QINGDAO SIFANG CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2018-04-13

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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.
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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...

Examples

Embodiment 1

[0079] A hand-held cable conduction test device for a rail vehicle, the rail vehicle includes at least two cables to be tested and a car body, including: at least three busbars, at least one busbar switching module, N grounding switching modules, switching Control the driving circuit and the grounding port used to connect with the vehicle body; N is the number of busbars, and N is a positive integer; the at least three busbars include an idle busbar, and the remaining busbars are test buses;

[0080] The switching control drive circuit is used to send a switching signal;

[0081] Each of the bus switching modules includes an enable input terminal for receiving switching signals, M cable connection terminals and M pairs of switching contacts, two of each pair of switching contacts are respectively connected to the idle bus and one of the The test busbar, the test busbars connected by different switching contacts are different, and the enable input terminal is connected to the M...

Embodiment 2

[0119] The difference from the above embodiment is that the test circuit as the master device also includes M×2 resistors and M resistor switching modules;

[0120] Every two resistors are connected in series in one of the bus power supply circuits, each resistance switching module includes an enable input terminal for receiving a switching signal and a pair of switching contacts, each resistance switching module communicates with each through a pair of switching contacts One resistor in the two bus power supply circuits is connected in parallel to form a resistance parallel circuit, and the enable input terminal of the resistance switching module is connected to the switching contact of the resistance switching module and the switching control drive circuit, for when a switching signal is received, Switching between on and off states of the resistor parallel circuit.

[0121] In this embodiment, when testing the cable short circuit or conduction resistance, the resistance con...