Development tool capable of conveniently switching CAN (Controller Area Network) bus

Abstract

The invention relates to a development tool for conveniently switching CAN buses, and belongs to the field. Comprising an OBD connector; the switching box is provided with a plurality of pin groups and a plurality of line change-over switches, and each pin group comprises two OBD (On-Board Diagnostic) pins; the line change-over switch is provided with two switch pins, and the two switch pins of the line change-over switch are connected with the two OBD pins of one pin group; a DB9 connector; the CAN bus comprises a first segment line and a second segment line, one end of the first segment line is connected with an OBD connector, the other end of the first segment line is connected with all the OBD pins, one end of the second segment line is connected with the DB9 connector, and the other end of the second segment line is connected with all the switch pins. According to the CAN bus switching device, different CAN buses cannot be repeatedly plugged and switched, different pin groups are rapidly switched through the line switching switch when the CAN bus switching device is used, switching of the CAN buses is achieved, and the CAN bus switching device is convenient and rapid to use.

Description

Technical Field

[0001] The present application relates to a field, and in particular to a development tool for conveniently switching CAN buses. Background Art

[0002] During the automobile development process, it is necessary to use CAN tools to monitor messages on the vehicle bus or to simulate sending messages to the vehicle bus through CAN tools. During the development process, it is often necessary to monitor data on different buses.

[0003] There are generally five CAN lines on a car. The current mainstream practice is to connect the five CAN lines through the ODB connector. The five CAN lines are connected to the DB9 connector of the host computer respectively. The five CAN lines can be divided into audio and video entertainment, body, new energy, power, and chassis. When using, you need to use which CAN line, just connect the corresponding CAN line to the DB9 connector of the host computer. There are two disadvantages of this method. One is that there are many connectors hanging on the tool line of the adapter cable, which is messy and difficult to organize; the other is that it is inconvenient to repeatedly plug and unplug the male and female heads of the DB9, and repeated plugging and unplugging will affect the life. Summary of the invention

[0004] The embodiment of the present application provides a development tool for conveniently switching CAN buses, so as to solve the defects in the related art that the multi-channel adapter cables are messy and difficult to organize, and the repeated plugging and unplugging to switch different CAN buses affects the service life.

[0005] The embodiment of the present application provides a development tool for conveniently switching the CAN bus, including: an OBD connector; an adapter box, on which multiple groups of pin groups and multiple line switching switches are arranged, each group of the pin groups includes two OBD pins; the line switching switch has two switch pins, and the two switch pins of the line switching switch are connected to two OBD pins of a group of the pin groups; a DB9 connector; a CAN bus, which includes a first segment line and a second segment line, one end of the first segment line is connected to the OBD connector, and the other end is connected to all the OBD pins, and one end of the second segment line is connected to the DB9 connector, and the other end is connected to all the switch pins.

[0006] In some embodiments, of the two OBD pins in each pin group, one of the OBD pins is connected to a switch pin of the circuit switching switch via a high level line, and the other OBD pin is connected to another switch pin of the circuit switching switch via a low level line.

[0007] In some embodiments, an indication label is provided on one side of each line switching switch on the adapter box, and the indication label is used to mark the purpose of each pin group.

[0008] In some embodiments, the adapter box is also provided with an indicator light, and the indicator light is electrically connected to the line switching switch.

[0009] In some embodiments, the adapter box is further provided with a spare pin group, and the spare pin group includes two OBD pins.

[0010] In some embodiments, a backup line switch is further provided on the adapter box, and the backup line switch has two switch pins. The two switch pins of the backup line switch are respectively connected to the two OBD pins of the backup pin group.

[0011] In some embodiments, the two switch pins of the circuit switching switch are respectively connected to two on-off wiring harnesses, and the two on-off wiring harnesses connected to the two switch pins of each circuit switching switch are connected in parallel with the DB9 connector.

[0012] In some embodiments, the DB9 connector has a male connector and a female connector, and the two switch pins of each line switching switch are connected to the two on-off wiring harnesses in parallel with the female connector of the DB9 connector.

[0013] In some embodiments, the first line segment is located on the adapter box and is connected to a plurality of pins, and the plurality of pins are welded at each group of the pin groups.

[0014] In some embodiments, the plurality of pin groups are respectively configured as audio and video entertainment pins, new energy pins, body pins, power pins, and chassis pins.

[0015] The beneficial effects of the technical solution provided by this application include:

[0016] The embodiment of the present application provides a development tool for conveniently switching the CAN bus. Since each set of pin groups has different functions, a plurality of pin groups are integrated and installed on the adapter box through an adapter box, thereby leading the ODB connector signal to the adapter box. There is a line switching switch on the adapter box, and the other end of the adapter box is connected to the DB9 connector. Therefore, when using it, when a function is needed, the corresponding line switching switch is turned on to effectively connect the OBD connector, the DB9 connector and the CAN bus, thereby effectively realizing the connection with the host computer, avoiding the defects caused by repeated plugging and unplugging, and improving the service life of the connector. The structural layout on the adapter box is also simple and compact, which is convenient for organization. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 An overall schematic diagram provided for an embodiment of the present application;

[0019] Figure 2 A schematic diagram of the internal wiring principle of the adapter box provided in an embodiment of the present application;

[0020] Figure 3 A schematic diagram for defining the pin group for this application;

[0021] Reference numerals:

[0022] 1. OBD connector; 2. Adapter box; 3. Line switching switch; 300, left switch pin; 301, right switch pin; 31, on / off wiring harness; 4. Indicator light; 5. Indicator label; 6. DB9 connector; 7. OBD pin, 80, first section of wire; 81, second section of wire. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0024] The embodiment of the present application provides a development tool for conveniently switching CAN buses, which can solve the defects that multi-channel adapter cables are messy and difficult to organize, and that repeated plugging and unplugging to switch different CAN buses affects the service life.

[0025] See also Figures 1 to 3As shown, the embodiment of the present application provides a development tool for conveniently switching the CAN bus, including: an OBD connector 1, a transfer box 2, a DB9 connector 6, and a CAN bus. In the present application, during the development of the car, it is necessary to monitor the messages on the vehicle bus through the CAN tool or simulate the sending of messages to the vehicle bus through the CAN tool. During the development process, it is often necessary to monitor the data on different buses. The set OBD connector 1 is a bridge connecting the vehicle diagnostic system and external diagnostic equipment (such as a scanning tool or a diagnostic instrument), allowing these devices to read and parse the vehicle's fault code, real-time data, and vehicle parameters. With this information, technicians or car owners can quickly locate and solve vehicle faults, optimize vehicle performance, and ensure that the vehicle meets emission standards. In the present application, the OBD connector 1 is used as an entry point for connecting the car CAN bus and is responsible for receiving signals from the CAN bus. The DB9 connector 6 is a widely used serial port connector with 9 pins. Through the DB9 connector 6, users can output the CAN bus signal to an external device for further analysis, debugging, or recording. The CAN bus is called "Controller Area Network" and is a fieldbus technology widely used internationally. It is designed for microcontroller communication in the automotive environment to exchange information between various electronic control devices on the vehicle. Therefore, the CAN bus is connected to transmit message information between the OBD connector 1 and the DB9 connector 6 to realize data monitoring on the vehicle bus during the automotive development process.

[0026] In order to facilitate the transmission of different message information, multiple groups of pin groups and multiple line switching switches 3 are set on the adapter box 2, each group of pin groups includes two OBD pins 7; the line switching switch 3 has two switch pins, each switch pin includes a left switch pin 300 and a right switch pin 301, and the two left switch pins 300 of the line switching switch 3 are connected to the two OBD pins 7 of a group of pins; the CAN bus includes a first segment line 80 and a second segment line 81, one end of the first segment line 80 is connected to the OBD connector 1, and the other end is connected to all the OBD pins 7 through a wiring harness, one end of the second segment line 81 is connected to the DB9 connector 6, and the other end is connected to all the right switch pins 301, so that the CAN bus realizes flexible switching between different devices or networks through the pin group and the line switching switch 3 of the adapter box 2.

[0027] When in use, the adapter box 2 allows the user to flexibly transmit the CAN bus signal to different destinations or devices by switching different line switching switches 3, thereby realizing switching between multiple CAN bus networks. By integrating the OBD connector 1, the adapter box 2, multiple groups of pin groups, the line switching switch 3, the DB9 connector 6 and the CAN bus, a flexible and efficient way is provided for the user to switch the CAN bus signal, which is particularly suitable for application scenarios that require access to multiple CAN networks at the same time or quickly switch CAN connections in different test scenarios.

[0028] In the present application, two OBD pins 7 are set in each pin group, one of which is connected to the left switch pin 300 of a switch pin of the line switching switch 3 through a high level line, and the other OBD pin 7 is connected to the left switch pin 300 of another switch pin of the line switching switch 3 through a low level line.

[0029] Through the high-level line and the low-level line, one of the OBD pins 7 is configured to output a high-level signal under certain conditions. When this high-level signal is sent to the corresponding switch pin of the line switch 3, it triggers the line switch 3 to change its state, which can be used to activate a certain system or function on the vehicle. Another OBD pin 7 outputs a low-level signal under certain conditions. When this low-level signal is sent to another switch pin of the line switch 3, it may trigger another state change of the switch, which can be used to implement different control logics. Therefore, when the line switch 3 is turned on, the two OBD pins 7 of the corresponding connected pin group are opened and closed at the same time, realizing the transmission of different functional signals.

[0030] In the present application, an indicator label 5 is also provided on one side of each line switching switch 3 on the adapter box 2, and the indicator label 5 is used to mark the purpose of each group of pin groups. When in use, the indicator label 5 clearly marks the purpose of each group of pin groups through words or symbols, such as "power input", "signal output", "control signal", etc., to avoid confusion caused by a large number of pins. And when repairing, debugging or replacing the line switching switch 3 in the adapter box 2, the indicator label 5 can guide the operator to quickly find the correct pin group, thereby improving work efficiency. Through the clear indicator label 5, the operator can perform operations more accurately, reducing the risk of equipment damage or failure due to misoperation.

[0031] In the present application, an indicator light 4 is also provided on the adapter box 2, and the indicator light 4 is electrically connected to the line switching switch 3. When in use, only the current channel switch is allowed to be in the on state. The resistance of the indicator light is much greater than 60Ω, and it is recommended to be above 1000Ω. The resistance of the parallel indicator bus can be controlled between 55 and 60Ω, which does not affect the bus communication. The indicator light 4 can display the current state of the line switching switch 3, such as whether it is in the on or off state. When switching the pin group, the indicator light 4 can light up or flash as an instant feedback of the successful operation. This helps the user or technician confirm that the operation has been performed correctly. In addition, during the troubleshooting process, the status of the indicator light 4 can provide useful information. For example, if an indicator light 4 that should be on does not light up, it may mean that there is a problem with the relevant line or switch.

[0032] In the present application, a spare pin group is also provided on the adapter box 2, and the spare pin group includes two OBD pins 7. With the continuous advancement of automobile technology and the increasing richness of functions, the adapter box 2 may need to support more interfaces and devices. The spare pin group provides a possibility for this, allowing the manufacturer to expand the function of the adapter box 2 by adding new modules or cables without replacing the entire adapter box 2. OBD pins 7 are interfaces specifically used for on-board diagnostic systems. They allow external devices to communicate with the control system of the car to read fault codes, monitor the status of the emission system, etc. Setting OBD pins 7 as a spare in the adapter box 2 means that the adapter box 2 can support future expansion of on-board diagnostic functions or integration with other diagnostic systems.

[0033] In the present application, a spare line switching switch 3 is also provided on the adapter box 2, and the spare line switching switch 3 has two switch pins, each of which includes a left switch pin 300 and a right switch pin 301, and the left switch pin 300 of the two switch pins of the spare line switching switch 3 is respectively connected to the two OBD pins 7 of the spare pin group. The spare line switching switch 3 allows the user or technician to switch and control the OBD pin 7 on the spare pin group as needed, and this flexibility enables the adapter box 2 to adapt to more diverse application scenarios and needs. And with the development of technology and the continuous upgrading of automobile functions, the spare line switching switch 3 can become a bridge for integrating new functions. When a new control system or sensor needs to be added, the connection and control with the new device can be achieved by activating the spare line switching switch 3. The two switch pins of the line switching switch 3 are directly connected to the two OBD pins 7 of the spare pin group. This connection method is simple and direct, and can ensure the stable transmission of signals during the switching process.

[0034] In the present application, the two switch pins of the line switching switch 3 are respectively connected to the two-way on-off harness 31, specifically, the right switch pins 301 of the two switch pins are respectively connected to the two-way on-off harness 31, and the two-way on-off harness 31 connected to the right switch pins 301 of the two switch pins of each line switching switch 3 is connected in parallel with the DB9 connector 6. The parallel connection allows the system to selectively use different lines by switching the switch without changing the wiring of the DB9 connector 6, providing a flexible and reliable circuit switching function for the system.

[0035] The DB9 connector 6 has a male head and a female head, and the two-way on-off wiring harnesses connected to the two switch pins of each line switching switch 3 are respectively connected in parallel with the female head of the DB9 connector 6. The DB9 connector 6 is a nine-pin connector, which is commonly used for serial communication and certain specific types of signal transmission. In the design, the DB9 connector 6 has both a male head and a female head, which have complementary shapes and structures, so that the male head and the female head can be tightly plugged together. When it comes to the connection between the line switching switch 3 and the DB9 connector 6, the two-way on-off wiring harnesses 31 connected to the two switch pins of each line switching switch 3 can be connected in parallel with the female head of the DB9 connector 6. This connection method allows the system to flexibly choose which on-off wiring harness 31 to use through the line switching switch 3 without changing the physical position of the DB9 connector 6. This connection method has high practical value and reliability in a variety of application scenarios.

[0036] The first section line 80 is located on the adapter box 2 and is connected to a plurality of pins, and a plurality of pins are welded at each group of pin groups. In the adapter box 2, each group of pin groups may correspond to a specific circuit, device or system interface. Welding a plurality of pins at each group of pin groups means that the pins are firmly connected together to form a stable electrical connection point. This connection method helps to ensure the stable transmission of signals or power and reduce failures caused by poor contact or looseness. Welding is the process of connecting two or more metal parts together by heating and melting filler metal. In the adapter box 2, the welding process is crucial to ensure a reliable connection between the pins and the pin groups. Good welding quality can ensure that the electrical connection between the pins and the pin groups is stable and reliable, thereby avoiding signal interruption or power transmission problems.

[0037] In this application, multiple pin groups are respectively set as audio and video entertainment pins, new energy pins, body pins, power pins and chassis pins. Audio and video entertainment pins control the input, processing and output of audio and video signals, such as car audio, radio, DVD player, Bluetooth audio stream, etc.; new energy pins monitor the voltage, current, temperature and other parameters of the battery pack, control the charging and discharging process or drive the electric motor of the electric vehicle, and adjust the speed and torque of the motor; body pin 9 controls the lifting and lowering of the window, controls the locking and unlocking of the door, adjusts the position, angle and heating and ventilation functions of the seat, etc.; power pins monitor and manage the performance of the engine, including fuel injection, ignition timing, emission control, etc. or transmission control: control the gear shifting logic of the transmission to ensure that the vehicle obtains the best power transmission and fuel efficiency under different driving conditions; chassis pin 94 adjusts the hardness and height of the suspension system to adapt to different road conditions and driving modes or brake system control: such as anti-lock braking system, electronic stability control system, etc.

[0038] It can be seen that different pin groups can be used for different functions. The examples in this application illustrate that the pin groups can be divided into, including but not limited to, 8 groups of pin groups, each pin group includes two OBD pins 7, and the two OBD pins 7 are divided into a high-level signal on the upper side and a low-level signal on the lower side. If you want to connect the audio and video entertainment pins, you can set the first pin and the ninth pin in the 8th pin group as a group, and connect the two switch pins of the line switching switch 3 accordingly. When the line switching switch 3 is turned on, it means that the audio and video entertainment pins are in a connected state. With the continuous development of automotive electronic technology, the functions of the pin group have also been expanded and developed. Therefore, in this application, it is possible to switch different line switching switches 3 to achieve the conversion of different functions, which is very flexible to use.

[0039] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it 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 it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0040] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0041] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A development tool for conveniently switching CAN buses, characterized in that: include: OBD connector (1); An adapter box (2) is provided with a plurality of pin groups and a plurality of line switching switches (3), each of the pin groups comprising two OBD pins (7); the line switching switch (3) has two switch pins, and the two switch pins of the line switching switch (3) are connected to the two OBD pins (7) of one pin group; DB9 connector (6); A CAN bus comprises a first line (80) and a second line (81), wherein one end of the first line (80) is connected to an OBD connector (1) and the other end is connected to all the OBD pins (7), and one end of the second line (81) is connected to the DB9 connector (6) and the other end is connected to all the switch pins.

2. A development tool for conveniently switching CAN buses as claimed in claim 1, characterized in that: Of the two OBD pins (7) in each pin group, one of the OBD pins (7) is connected to a switch pin of the line switch (3) via a high-level line, and the other OBD pin (7) is connected to another switch pin of the line switch (3) via a low-level line.

3. A development tool for conveniently switching CAN buses as claimed in claim 1, characterized in that: On the adapter box (2), an indication label (5) is provided on one side of each line switching switch (3), and the indication label (5) is used to mark the purpose of each pin group.

4. A development tool for conveniently switching CAN buses as claimed in claim 1, characterized in that: The adapter box (2) is also provided with an indicator light (4), and the indicator light (4) is electrically connected to the line switch (3).

5. A development tool for conveniently switching CAN buses as claimed in claim 1, characterized in that: The adapter box (2) is also provided with a spare pin group, which includes two OBD pins (7).

6. A development tool for conveniently switching CAN buses as claimed in claim 1, characterized in that: The adapter box (2) is also provided with a standby line switch (3), wherein the standby line switch (3) has two switch pins, and the two switch pins of the standby line switch (3) are respectively connected to the two OBD pins (7) of the standby pin group.

7. A development tool for conveniently switching CAN buses as claimed in claim 1, characterized in that: The two switch pins of the circuit switching switch (3) are respectively connected to two on-off wiring harnesses (31), and the two on-off wiring harnesses (31) connected to the two switch pins of each circuit switching switch (3) are connected in parallel to the DB9 connector (6).

8. A development tool for conveniently switching CAN buses as claimed in claim 7, characterized in that: The DB9 connector (6) has a male connector and a female connector, and the two on-off wiring harnesses (31) connected to the two switch pins of each line switching switch (3) are respectively connected in parallel with the female connector of the DB9 connector (6).

9. A development tool for conveniently switching CAN buses as claimed in claim 1, characterized in that: The first section line (80) is located on the adapter box (2) and is connected to a plurality of pins, and the plurality of pins are welded at each group of the pin groups.

10. A development tool for conveniently switching CAN buses as claimed in claim 1, characterized in that: The plurality of pin groups are respectively configured as audio and video entertainment pins, new energy pins, body pins, power pins and chassis pins.

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