Program flashing wiring harness capable of being used for various controllers

Abstract

The utility model provides a program flashing wiring harness capable of being used for various controllers, and relates to the field of controller matching wiring harnesses. The system comprises an OBD diagnosis interface; the OBD diagnosis interface is connected with a CAN wire harness; the CAN wire harness comprises two electric wires; the CAN wire harness is connected with the DB9 interface; the DB9 interface is connected in parallel with a resistor, and the resistor is connected with two electric wires at the same time; the resistor is also connected in series with a switch; when the switch is closed, the resistor is connected to the CAN wire harness. When the switch is turned on, the resistor is disconnected from the CAN wire harness. According to the condition of the whole vehicle wire harness and the resistance of the controller, through the scheme of controlling the CAN wire harness to be connected or disconnected with the resistance, the requirement that the program flashing wire harness of the controller is compatible with various controller flashing programs is met.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the controller matching wire harness design field, especially relate to a program write-in wire harness for multiple controllers. BACKGROUND

[0002] The statements in this section merely provide background information related to the utility model and do not necessarily constitute prior art.

[0003] The excavator is provided with an engine controller and a vehicle controller, and two vehicle controllers are used on the mine excavator due to more functions. When the program is written and read, the controller is written and read by CAN wire harness and related tools, and the entire loop needs to be guaranteed 60Ω resistance during the writing and reading process. Due to different model configurations, the controller needs to write different programs and write different tools. Generally, a 120Ω resistance is provided on the wire harness at the initial design stage, and some writing tools or controllers have a built-in 120Ω resistance, which only needs to be connected into a loop. However, some writing tools or controllers do not have a resistance, and a parallel resistance needs to be added to the wire harness for controller writing and reading.

[0004] The existing controller program writing wire harness usually uses two wire harnesses to switch back and forth, which is complicated to operate and has high use cost, and cannot meet the needs of writing programs for multiple controllers. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a program write-in wire harness for multiple controllers to solve the technical problem that the existing controller program write-in wire harness cannot meet the needs of writing programs for multiple controllers.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0007] The utility model provides a program write-in wire harness for multiple controllers, which comprises:

[0008] An OBD diagnostic interface;

[0009] The OBD diagnostic interface is connected with a CAN wire harness;

[0010] The CAN wire harness comprises two wires;

[0011] The CAN wire harness is connected with a DB9 interface;

[0012] The DB9 interface is connected with a resistance in parallel, and the resistance is connected with the two wires at the same time;

[0013] The resistance is also connected with a switch in series;

[0014] When the switch is closed, the resistance is connected to the CAN harness;

[0015] When the switch is opened, the resistance is disconnected from the CAN harness.

[0016] Further, each of the resistances has a resistance value of 120Ω.

[0017] Further, the CAN harness is a twisted pair.

[0018] Further, the OBD diagnostic interface is connected to the vehicle harness.

[0019] Further, the vehicle harness is connected to the controller.

[0020] Further, the DB9 interface is connected to the test tool.

[0021] Further, the test tool is connected to a computer.

[0022] Further, the OBD diagnostic interface can be connected to two or more CAN harnesses.

[0023] Further, the OBD diagnostic interface is a ladder-shaped 16-pin female interface.

[0024] Further, the DB9 interface is a ladder-shaped interface.

[0025] The technical scheme of the utility model has the following beneficial effects:

[0026] The utility model discloses according to vehicle harness and controller resistance condition, through the scheme of controlling CAN harness access or disconnect resistance, realizes the program of controller's brush writing harness compatible multiple controller brush writing program's demand.

[0027] The utility model discloses simple structure, avoids the complicated work of two wire harnesss back and forth switching, reduces the cost.

[0028] The utility model discloses according to controller has two kinds, namely the controller of not self- resistance and self- resistance, through the scheme of CAN harness access or disconnect resistance, can prevent the wrong program, can protect the controller twice.

[0029] The advantages of the additional aspects of the utility model will be partly given in the following description, and some will become obvious from the following description, or be understood through the practice of the utility model. DETAILED DESCRIPTION

[0030] The drawings accompanying the specification provide further understanding of the utility model, and the illustrative embodiments of the utility model and the description thereof are used to explain the utility model, and do not constitute improper limitation to the utility model.

[0031] Figure 1 is a structural schematic view of the utility model.

[0032] Figure 2 is a hardware connection schematic view of the utility model in working DETAILED DESCRIPTION

[0033] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the utility model. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the utility model belongs.

[0034] It should be noted that the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the exemplary embodiments according to the utility model.

[0035] In the case of no conflict, the embodiments in the utility model and the features in the embodiments can be combined with each other.

[0036] The utility model discloses a program writing wire harness for a plurality of controllers, which comprises Figure 1 As shown in the figure, comprising:

[0037] OBD diagnostic interface, OBD diagnostic interface connects CAN wire harness, CAN wire harness includes two electric wires, and is CAN1H and CAN1L respectively, CAN wire harness is connected in series with a DB9 interface, and each DB9 interface is connected with a resistance in parallel, and the resistance is connected with CAN1H and CAN1L simultaneously, and the resistance is also connected with a switch in series, when the switch is closed, the resistance is connected to CAN wire harness, and a loop is formed, when the switch is opened, the resistance is disconnected with two CAN wire harnesses.

[0038] In a specific embodiment, the resistance value of the resistance connected in parallel with each DB9 interface is 120Ω.

[0039] In a specific embodiment, the CAN (Controller Area Network) wire harness is usually implemented by using a twisted pair wire. The twisted pair wire is formed by winding two insulated copper wires around each other. This structure helps to reduce electromagnetic interference and improve the anti-interference ability of signals, thereby ensuring the reliability and stability of data transmission. The CAN wire harness can also include a shielding layer to further reduce electromagnetic interference. The shielded twisted pair wire adds a layer of metal shielding to the outer layer of the twisted pair wire, providing additional protection against electromagnetic interference.

[0040] In a specific embodiment, one end of the vehicle wire harness is connected to the controller, and the other end is connected to the OBD diagnostic interface.

[0041] In a specific embodiment, the OBD diagnostic interface is an interface of an on-board diagnostics system, which is a standard interface for monitoring the running state of a vehicle and diagnosing vehicle faults.

[0042] In a specific embodiment, the DB9 interface is a widely used connector type for serial communication, with 9 pins, a trapezoidal interface.

[0043] In a specific embodiment, CAN1H and CAN1L are two wires of a first CAN harness, CAN0H and CAN0L are two wires of a second CAN harness, pin 3 of the OBD diagnostic interface is connected to CAN1H, pin 11 is connected to CAN1L, pin 6 is connected to CAN0H, and pin 14 is connected to CAN0L.

[0044] The two wires of the first CAN harness transmit signals through a voltage difference, and this differential transmission method enables stable data communication even in a noisy environment, When the voltage of CAN1H is higher than that of CAN1L, it is called "dominant" state, representing logic "0", while when the voltages of CAN1H and CAN1L are equal, it is called "recessive" state, representing logic "1". The second CAN harness is the same.

[0045] In a specific embodiment, two DB9 interfaces are provided, namely a first DB9 interface and a second DB9 interface, pin 7 of the first DB9 interface is connected to CAN1H, and pin 2 is connected to CAN1L, pin 7 of the second DB9 interface is connected to CAN0H, and pin 2 is connected to CAN0L.

[0046] The DB9 interface is connected to the test equipment, and the test equipment such as PCAN is also a DB9 interface.

[0047] The working principle of the utility model is as follows:

[0048] In the utility model, when working, as shown in the figure, the computer, test tool, DB9, OBD, whole vehicle harness and controller are connected in sequence. Figure 2

[0049] The program writing harness provided by the utility model can be compatible with multiple controllers and is divided into the following three cases:

[0050] Case 1: If the whole vehicle harness is provided with a 120Ω resistor, and the tool used and the controller to be written do not have a resistor, then the switch needs to be closed, that is, the resistor is enabled (120Ω resistor is connected to the CAN harness), and the whole loop resistance is 60Ω in this state, which can realize program writing and reading. ​

[0051] Case 2: If the whole vehicle harness is equipped with 120Ω resistor, and the tool adapted by the controller is also equipped with 120Ω resistor, then the switch needs to be opened, that is, the terminal resistor does not work (120Ω resistor is not connected to the CAN harness). In this state, the whole vehicle loop resistance is 60Ω, and the program can be written and read.

[0052] Case 3: If the whole vehicle has no resistor, and the tool used and the controller to be written have a resistor, then the switch needs to be closed, that is, the terminal resistor works (120Ω resistor is connected to the CAN harness). In this state, the whole loop resistance is 60Ω, and the program can be written and read.

[0053] If only the harness is simply switched, it is easy to write an error to cause the controller to fail. For example, controller A should correspond to write A program, and 120Ω resistor needs to be connected to the CAN harness to write; and controller B corresponds to write B program, and 120Ω resistor does not need to be connected to the CAN harness to write. At this time, it is intended to write controller A but selects B program, but because 120Ω resistor is not connected to the CAN harness, it will cause the program to fail to write, and further protect controller A.

[0054] In the above embodiments, the device elements involved are conventional device elements, and the structure setting mode, working mode or control mode involved are conventional setting mode, working mode or control mode in the art, unless otherwise specified.

[0055] Although the specific embodiments of the utility model have been described in combination with the drawings, it is not a limitation on the protection scope of the utility model. Those skilled in the art should understand that various modifications or deformations made by the skilled in the art on the basis of the technical scheme of the utility model without creative labor are still within the protection scope of the utility model.

Claims

1. A programmable wiring harness applicable to multiple controllers, characterized in that, The OBD diagnostic interface comprises a CAN wire harness; The OBD diagnostic interface is connected with the CAN wire harness; The CAN wire harness comprises two electric wires; The CAN wire harness is connected with a DB9 interface; The DB9 interface is connected with a resistor in parallel, and the resistor is connected with the two electric wires; The resistor is connected with a switch in series; When the switch is closed, the resistor is connected with the CAN wire harness; When the switch is opened, the resistor is disconnected with the CAN wire harness.

2. A program flasher harness for use with a plurality of controllers as recited in claim 1, wherein, Each resistor has a resistance of 120Ω.

3. A program flasher harness for use with a plurality of controllers as defined in claim 1, wherein, The CAN wire harness is a twisted wire.

4. A program flasher harness for use with a plurality of controllers as defined in claim 1, wherein, The OBD diagnostic interface is connected with a vehicle wire harness.

5. A program flasher harness for use with a plurality of controllers as defined in claim 4, wherein, The vehicle wire harness is connected with a controller.

6. A program flasher harness for use with a plurality of controllers as defined in claim 1, wherein, The DB9 interface is connected with a test tool.

7. A program flasher harness for use with a plurality of controllers as defined in claim 6, wherein, The test tool is connected with a computer.

8. A program flasher harness for use with a plurality of controllers as defined in claim 1, wherein, The OBD diagnostic interface can be connected with two or more CAN wire harnesses.

9. A program flasher harness for use with a plurality of controllers as defined in claim 1, wherein, The OBD diagnostic interface is a trapezoidal 16-pin female interface.

10. A program flasher harness for use with a plurality of controllers as defined in claim 1, wherein, The DB9 interface is a trapezoidal interface.

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