A vehicle-mounted static testing tool and system

Abstract

This invention provides an on-board static testing tool and system. The on-board static testing tool includes a cable adapter structure and a multimeter. The cable adapter structure includes a female aviation connector for connecting to a male connector structure of a pre-embedded cable interface under the vehicle. The other end of the female aviation connector is provided with a cable assembly. The cable assembly includes a connecting shell and connecting cables disposed within the connecting shell. The connecting cables are divided into two groups: ABC and PSR. Each connecting cable has a cable head at its end for connecting to the multimeter. This invention has a simple structure and reasonable design, which can transfer the test points of the train's tachometer generator from a densely distributed male connector to a more dispersed female connector cable, facilitating measurement and reducing the risk of equipment short circuits.

Description

Technical Field

[0001] This utility model relates to the field of train testing, specifically an on-board static testing tool and system. Background Technology

[0002] Maintenance of onboard signaling equipment is mainly carried out at the depot's inspection and maintenance warehouse through methods such as visual inspection of light positions, tightness checks, equipment self-inspection, static testing, component disassembly and inspection, and dynamic testing on the test track or main line. Static testing aims to eliminate potential onboard equipment failures that may occur during train movement or dynamic testing, saving time and manpower costs associated with dynamic testing on the test track or main line.

[0003] Static testing of the power supply voltage of the vehicle-mounted tachogenerator (i.e., the power supply voltage of the internal photosensitive element of the tachogenerator) requires live testing. The test point is the male pin structure of the aviation connector between the tachogenerator and the pre-embedded wire interface under the vehicle. On-site implementation carries the risk of short-circuiting the equipment. Currently, measuring the power supply voltage of the tachogenerator in the PSU equipment can only confirm the voltage output of the PSU equipment, but cannot further confirm whether the power supply voltage and power supply circuit of the tachogenerator are normal. This may result in the tachogenerator power supply voltage meeting the static test standards, but failing the dynamic test, increasing the manpower and time costs of troubleshooting and further dynamic testing.

[0004] Because the static test of the power supply voltage of the photosensitive element inside the vehicle-mounted tachogenerator requires live testing, and the test point is the male pin structure of the aviation connector between the tachogenerator and the pre-embedded wire under the vehicle, there is a risk of short-circuiting the equipment on-site. The continuity checks of the signal vehicle-mounted TWR external cable (PSU-TWR-P1 / P5), the power supply circuit of the tachogenerator inside the IRU, and the pre-embedded wires under the vehicle (Ca07, Ca08) that could potentially cause malfunctions were neglected. Summary of the Invention

[0005] To address the shortcomings of the existing technology, this utility model provides a vehicle-mounted static testing tool and system with a simple structure. It transfers the test points of the tachogenerator from densely distributed male pins to female pins connected to the cable, reducing the risk of short circuits and facilitating measurement.

[0006] The technical solution provided by this utility model is as follows: a vehicle-mounted static testing tool, including a cable adapter structure and a multimeter. The cable adapter structure includes a female aviation plug for connecting to a male aviation plug structure of a pre-embedded wire interface under the vehicle. The other end of the female aviation plug is provided with a cable assembly. The cable assembly includes a connecting shell and connecting cables disposed in the connecting shell. The connecting cables are divided into two groups, ABC and PSR. Each connecting cable has a cable head at its end for connecting to the multimeter.

[0007] Each group of ABC and PSR has three connecting cables, and the ends of the three connecting cables in the same group are separated by clips.

[0008] The length of the connecting cable is set according to the actual testing needs on site.

[0009] Another technical solution provided by this utility model: an on-board static testing system, including the above-mentioned testing tools, and also including a 24V DC power supply, a TWR external card cable, an IRU internal tachogenerator power supply circuit and a pre-embedded wire under the train car. The 24V DC power supply is connected to the IRU internal tachogenerator power supply circuit via the TWR external card cable. The IRU internal tachogenerator power supply circuit is connected to the female aviation plug of the cable adapter structure through the male pin structure of the pre-embedded wire under the train car. The two measuring cables of the multimeter are respectively connected to the cable heads of the ABC and PSR connecting cables.

[0010] This utility model has a simple structure and can transfer the test points from densely distributed male pins to dispersed female pins connecting the cables, reducing the risk of equipment short circuits. It can measure the power supply voltage of the tachogenerator, confirm whether the power supply voltage and power supply circuit of the tachogenerator are normal, and at the same time check whether the PSU to IRU, the internal circuit of IRU, and the pre-embedded wires Ca07 and Ca08 under the vehicle are normal. This utility model improves the quality and efficiency of on-board equipment maintenance, saves some on-board equipment fault diagnosis time, saves 2-3 person-times of manpower costs for on-board signal system overhaul, test line and mainline EMU debugging of faulty trains, and saves fault handling time costs of 180 minutes. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] Figure 2 This is a schematic diagram of the cable adapter structure of this utility model;

[0013] Figure 3 This is a cross-sectional view of the cable adapter structure of this utility model;

[0014] Figure 4 This is a circuit diagram illustrating the testing principle of this utility model;

[0015] In the diagram: 1—Cable adapter structure, 101—Female aviation plug, 102—Connecting shell, 103—Connecting cable, 104—Cable head, 105—Snap fastener, 2—Multimeter. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] In the description of this utility model, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0018] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] like Figure 1-3 The vehicle-mounted static testing tool shown includes a cable adapter structure 1 and a multimeter 2. The cable adapter structure 1 includes a female aviation plug 101 for connecting to the male connector structure of the pre-embedded wire interface under the vehicle. The other end of the female aviation plug 101 is provided with a cable assembly. The cable assembly includes a connecting shell 102 and connecting cables 103 disposed in the connecting shell. The connecting cables 103 are divided into two groups: ABC and PSR. The end of each connecting cable 103 is provided with a cable head 104 for connecting to the multimeter 2.

[0020] Each group of ABC and PSR has three connecting cables, and the ends of the three connecting cables in the same group are separated by clips 105. The length of the connecting cable 103 is set according to the actual testing needs on site.

[0021] like Figure 4As shown, an on-board static testing system includes the aforementioned testing tool, as well as a 24V DC power supply, a TWR external card cable, an IRU internal tachogenerator power supply circuit, and a pre-embedded wire under the train. The 24V DC power supply is connected to the IRU internal tachogenerator power supply circuit via the TWR external card cable. The IRU internal tachogenerator power supply circuit is connected to the female aviation plug of the cable adapter structure via the male pin structure of the pre-embedded wire under the train. The two measuring cables of the multimeter are respectively connected to the cable heads of the ABC and PSR connecting cables.

[0022] One end of the cable adapter structure of this utility model is a female aviation plug. The cable adapter structure contains 6 cables, which are connected in two groups to the male pins ABC and PSR respectively. ABC is one group and PSR is another group. They are connected to the male pins through the female aviation plug. The voltage value between PSR and ABC is measured with a multimeter.

[0023] This invention utilizes the 24V DC power supplied by the TWR card as the circuit power source. This power is transmitted via the TWR external card cable, the internal circuitry of the IRU, and the vehicle's specialized underbody pre-embedded wiring to the vehicle's male connector. A static testing tool uses a 6-wire female connector connected to the male connector to bring out the test points. A multimeter is used to measure the corresponding points to determine if the circuit is functioning correctly. With the vehicle battery providing power, the supply voltage of a certain photosensitive element inside the tachogenerator 1 was measured to be 23V DC. After confirming that the circuit is functioning correctly, the tachogenerator can be connected to the interface of the underbody pre-embedded wiring for use.

[0024] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A vehicle-mounted static testing tool, characterized in that, The device includes a cable adapter structure (1) and a multimeter (2). The cable adapter structure (1) includes a female aviation plug (101) for connecting to the male structure of the aviation plug for the pre-embedded wire interface under the vehicle. The other end of the female aviation plug (101) is provided with a cable assembly. The cable assembly includes a connecting shell (102) and a connecting cable (103) disposed in the connecting shell. The connecting cable (103) is divided into two groups: ABC and PSR. The end of each connecting cable (103) is provided with a cable head (104) for connecting to the multimeter (2).

2. The vehicle-mounted static testing tool according to claim 1, characterized in that, Each group of ABC and PSR has three connecting cables, and the ends of the three connecting cables in the same group are separated by a clip (105).

3. The vehicle-mounted static testing tool according to claim 1, characterized in that, The length of the connecting cable (103) is set according to the actual testing needs on site.

4. A vehicle-mounted static testing system, comprising the testing tool as described in any one of claims 1-3, characterized in that, It also includes a 24V DC power supply, a TWR external card cable, an IRU internal tachogenerator power supply circuit, and a pre-embedded wire under the train. The 24V DC power supply is connected to the IRU internal tachogenerator power supply circuit via the TWR external card cable. The IRU internal tachogenerator power supply circuit is connected to the female aviation plug of the cable adapter structure via the male pin structure of the pre-embedded wire under the train. The two measuring cables of the multimeter are connected to the cable heads of the ABC and PSR connecting cables, respectively.

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