Switchable data communication device for downloading of brake fault data of a motor train unit

Abstract

The utility model provides a kind of switchable data communication equipment for EMU braking fault data download, including protocol conversion unit and interface adaptation unit, protocol conversion unit includes USB connector, switch, first serial port controller, second serial port controller and first DB9 male head;Interface adaptation unit includes first DB9 female head with first DB9 male head pluggable adaptation, and second DB9 female head, second DB9 male head and aviation plug are electrically connected by wire three-way in the output end of first DB9 female head with first DB9 female head.The utility model can make different communication form switch to carry out data download and have download redundancy port, solve the current USB conversion 232 switch USB conversion 485 communication equipment, for different communication scene fast switching, improve the practicability of equipment.

Description

Technical Field

[0001] This utility model relates to the field of data communication interface technology, and in particular to a multi-functional adapter that supports dynamic switching between USB and RS-232 / RS-485 dual protocols and is compatible with multiple vehicle ports. Background Technology

[0002] The current method for downloading braking fault data from high-speed trains uses a single USB-to-232 male DB9 adapter and a USB-to-485 male DB9 adapter, with separate single-wire adapters for connecting DB9 female to DB9 female, DB9 female to DB9 male, and DB9 female to an 8-pin aviation square connector. Data downloads are performed on a one-to-one basis, which has the following drawbacks: Poor versatility: A single device only supports one communication protocol. When facing the RS232 / RS485 interface requirements of different devices (such as vehicle controllers and sensors) in vehicle scenarios, multiple devices need to be carried, which is cumbersome to operate. Low interface compatibility: Vehicle equipment has a variety of interface types (such as DB9 male, DB9 female, aviation plug), and the output interface of existing equipment is fixed, requiring additional adapter cables for adaptation, resulting in messy wiring and increased failure rate; Insufficient reusability: The overall integration of the equipment is low, it can only be used in specific scenarios, and it cannot be disassembled for use in non-vehicle environments (such as industrial control, laboratory debugging), resulting in low equipment utilization. The switching structure is complex: some multi-protocol devices use chip identification and switching, which is costly and has strict requirements for the operating environment, and is not suitable for complex working conditions such as vehicle bumps and voltage fluctuations.

[0003] To address the aforementioned issues, there is an urgent need for a communication device that is simple in structure, low in cost, can flexibly switch protocols and adapt to multiple interfaces, and also has the ability to be split and reused to meet the needs of in-vehicle and multi-scenario applications. Utility Model Content

[0004] The purpose of this utility model is to overcome the defects of the prior art and provide a switchable data communication device for downloading braking fault data of EMU trains, which solves the problems of complex protocol switching, single interface adaptation and poor reusability, and realizes the functions of multi-purpose, multi-scenario reuse and low-cost switching of a single cable.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a switchable data communication device for downloading braking fault data of high-speed trains, characterized in that it includes a protocol conversion unit and an interface adaptation unit. The protocol conversion unit includes a USB connector, a switch, a first serial port controller, a second serial port controller, and a first DB9 male connector. The signal output terminal of the USB connector is electrically connected to the signal input terminal of the switch. The switch has two signal output terminals, which are electrically connected one-to-one to the input terminals of the first and second serial port controllers. The output terminals of the first and second serial port controllers are connected in parallel and then electrically connected to the first DB9 male connector. The interface adapter unit includes a first DB9 female connector that is pluggable and adaptable to the first DB9 male connector, and a second DB9 female connector, a second DB9 male connector, and an aviation plug that are electrically connected to the output terminal of the first DB9 female connector in three separate circuits via wires.

[0006] The beneficial effects of this utility model are: 1. This utility model integrates protocol switching and interface adaptation, combining "SS-42 DIP switch (low cost, high reliability)" with "1 to 3 multi-interface output", solving the dual needs of "diverse protocols + diverse interfaces" in vehicle scenarios. It eliminates the need for additional adapter cables, achieving multi-purpose use with a single cable. The structure is simple and the operation is convenient.

[0007] 2. This utility model has high reusability. The protocol conversion unit can be used independently, breaking through the limitation of "scenario binding". It can be adapted to the vehicle environment and can also be used in industrial, laboratory and other scenarios, with high equipment utilization.

[0008] 3. This utility model can adapt to complex working conditions. It uses SS-42 DIP switch (mechanical switching, anti-bump and anti-voltage fluctuation) to replace the traditional identification chip, which is low in cost and adaptable to complex environments such as vehicle bumps and electromagnetic interference, thus improving communication stability. Attached Figure Description

[0009] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly described below.

[0010] Figure 1 This is the electrical functional diagram of this utility model.

[0011] Figure 2 This is the electrical schematic diagram of this utility model.

[0012] Figure 3 This is a schematic diagram of the overall structure of this utility model.

[0013] Explanation of reference numerals in the attached figures: 1. USB connector; 2. Switch; 3. First serial port controller; 4. Second serial port controller; 5. First DB9 male connector; 6. First DB9 female connector; 7. Second DB9 female connector; 8. Second DB9 male connector; 9. Aviation connector; 10. Housing; 11. Lever. Detailed Implementation

[0014] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0015] Please refer to Figures 1 to 3 As shown, this embodiment discloses a switchable data communication device for downloading braking fault data of a high-speed train, including a protocol conversion unit and an interface adapter unit. The protocol conversion unit includes a USB connector 1, a switch 2, a first serial port controller 3, a second serial port controller 4, and a first DB9 male connector 5. The signal output terminal of the USB connector 1 is electrically connected to the signal input terminal of the switch 2. The switch 2 has two signal output terminals, which are electrically connected one-to-one to the input terminals of the first serial port controller 3 and the second serial port controller 4. The output terminals of the first serial port controller 3 and the second serial port controller 4 are connected in parallel and then electrically connected to the first DB9 male connector 5. The device also includes a housing 10, in which the switch 2, the first serial port controller 3, the second serial port controller 4, and the first DB9 male connector 5 are fixed. The switch 2 is located inside the housing 10 and has a lever 11 extending to one side of the housing 10. The first serial port controller 3 and the second serial port controller 4 are encapsulated within the housing 10. The first DB9 male connector 5 is located on the other side of the housing 10 and is used to connect the interface adapter unit. The USB connector 1 is fixedly connected to the housing 10 as a whole, or in another embodiment, it can be plugged into the housing 10.

[0016] In this embodiment, the switch 2 is an SS-42 DIP switch. The lever 11 of the switch 2 can selectively connect the "USB connector 1 - first serial port controller 3" or "USB connector 1 - second serial port controller 4" path. The first serial port controller 3 is an RS232 serial port controller, and the second serial port controller 4 is an RS485 serial port controller.

[0017] When assembling the protocol conversion unit, the VCC, G+, G-, and GND pins of the USB connector 1 are electrically connected to the common terminal pins (pins 1, 4, 7, and 10) of the switch 2 one by one. The first position pins (pins 2, 5, 8, and 11) of the switch 2 are electrically connected to the VCC, G+, G-, and GND pins of the second serial port controller 4, respectively; the second position pins (pins 3, 6, 9, and 12) of the switch 2 are electrically connected to the VCC, G+, G-, and GND pins of the first serial port controller 3, respectively. The output pins (pins 1-9) of the first serial port controller 3 and the output pins (pins 1-9) of the second serial port controller 4 are connected in parallel one by one, and then connected to pins 1-9 of the first DB9 male connector 5 to complete the assembly of the protocol conversion unit.

[0018] The interface adapter unit includes a first DB9 female connector 6, a second DB9 female connector 7, a second DB9 male connector 8, and an aviation connector 9. The first DB9 female connector 6 is pluggable to the first DB9 male connector 5. The output terminal of the first DB9 female connector 6 is electrically connected to the second DB9 female connector 7, the second DB9 male connector 8, and the aviation connector 9 via three wires. The aviation connector 9 has a 9-pin structure.

[0019] When assembling the interface adapter unit, select the first DB9 female connector 6 that is compatible with the first DB9 male connector 5. Pins 1, 2, 3, and 5 of the first DB9 female connector 6 are connected in three paths via shielded wires: First path: Pins 2, 3, and 5 of the first DB9 female connector 6 are connected one-to-one to pins 3, 2, and 5 of the second DB9 female connector 7 (for vehicle-mounted DB9 male connector devices). Second path: Pins 1 and 2 of the first DB9 female connector 6 are connected one-to-one to pins 2 and 7 of the second DB9 male connector 8 (for vehicle-mounted DB9 female connector interface equipment). Third path: Pins 2, 3, and 5 of the first DB9 female connector 6 are connected one-to-one to pins 6, 7, and 8 of the aviation connector 9 (for vehicle-mounted aviation connector interface equipment).

[0020] When using in a vehicle, connect USB connector 1 to the vehicle's host USB port, and toggle switch 2 according to the vehicle's communication protocol. Switch to the first position: turn on the second serial port controller 4 (RS485 serial port controller), and the first DB9 male connector 5 outputs an RS485 signal; Switch to the second position: turn on the first serial port controller 3 (RS232 serial port controller), and the first DB9 male connector 5 outputs an RS232 signal; According to the interface type of the vehicle equipment, select the output end of the interface adapter unit: when the vehicle equipment is a DB9 male connector, use the second DB9 female connector 7 for connection; when the vehicle equipment is a DB9 female connector, use the second DB9 male connector 8 for connection; when the vehicle equipment is a rectangular 9-pin aviation connector, use the rectangular aviation connector 9 for connection.

[0021] In addition, the protocol conversion unit is an independent and detachable structure. After disassembly, it can be connected to an external device independently through the first DB9 male connector 5 to realize protocol communication between the first serial port controller 3 and the second serial port controller 4.

[0022] When used in non-vehicle environments, disassemble the protocol conversion unit (disconnect the first DB9 male connector 5 from the first DB9 female connector 6); connect the USB connector 1 to the computer's USB port, toggle the switch 2 to select the protocol, and directly connect the industrial controller or experimental equipment through the first DB9 male connector 5 to achieve RS232 / RS485 communication.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A switchable data communication device for downloading braking fault data of high-speed trains, characterized in that, Includes a protocol conversion unit and an interface adaptation unit. The protocol conversion unit includes a USB connector (1), a switch (2), a first serial port controller (3), a second serial port controller (4), and a first DB9 male connector (5). The signal output terminal of the USB connector (1) is electrically connected to the signal input terminal of the switch (2). The switch (2) has two signal output terminals, which are electrically connected to the input terminals of the first serial port controller (3) and the second serial port controller (4) respectively. The output terminals of the first serial port controller (3) and the second serial port controller (4) are connected in parallel and then electrically connected to the first DB9 male connector (5). The interface adapter unit includes a first DB9 female connector (6) that is pluggable and adaptable to the first DB9 male connector (5), and a second DB9 female connector (7), a second DB9 male connector (8), and an aviation plug (9) that are electrically connected to the output terminal of the first DB9 female connector (6) in three circuits via wires.

2. The switchable data communication device for downloading braking fault data of high-speed trains according to claim 1, characterized in that, It also includes a housing (10), the switch (2), the first serial port controller (3), the second serial port controller (4) and the first DB9 male connector (5) are fixed to the housing (10), the switch (2) has a lever (11) located on one side of the housing (10) and the first DB9 male connector (5) is located on the other side of the housing (10).

3. The switchable data communication device for downloading braking fault data of high-speed trains according to claim 1 or 2, characterized in that, The USB connector (1) is fixedly connected to or plugged into the housing (10).

4. The switchable data communication device for downloading braking fault data of high-speed trains according to claim 2, characterized in that, The switching switch (2) is an SS-42 DIP switch, and the lever (11) of the switching switch (2) can selectively conduct the path of "USB connector (1) - first serial port controller (3)" or "USB connector (1) - second serial port controller (4)".

5. The switchable data communication device for downloading braking fault data of a high-speed train according to claim 1, characterized in that, The first serial port controller (3) is an RS232 serial port controller, and the second serial port controller (4) is an RS485 serial port controller.

6. The switchable data communication device for downloading braking fault data of a high-speed train according to claim 1, characterized in that, The protocol conversion unit is an independent and detachable structure. After disassembly, it can be connected to an external device separately through the first DB9 male connector (5) to realize protocol communication between the first serial port controller (3) and the second serial port controller (4).

7. The switchable data communication device for downloading braking fault data of a high-speed train according to claim 1, characterized in that, The aviation connector (9) has a 9-pin structure.

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