Remote upgrading circuit based on vehicle-mounted T-BOX

Abstract

The utility model relates to the technical field of automation control, in particular to a remote upgrading circuit based on a vehicle-mounted T-BOX. Comprising a vehicle-mounted T-BOX, a relay, a first controller and a second controller, the vehicle-mounted T-BOX comprises a main CAN-L interface and a main CAN-H interface, the first controller comprises a first CAN-H interface and a second CAN-L interface, the second controller comprises a second CAN-L interface and a second CAN-H interface, and the main CAN-H interface and the main CAN-L interface can be connected with the first CAN-H interface and the first CAN-L interface respectively through a relay. Or the second CAN-H interface and the second CAN-L interface can be respectively connected through the relay; compared with the prior art, one relay is used for realizing flashing and upgrading of two different controllers, and compared with two relays, the relay in the device needs fewer interfaces when being connected with the vehicle-mounted T-BOX.

Description

Technical Field

[0001] The utility model relates to the technical field of automatic control, in particular to a remote upgrading circuit based on a vehicle-mounted T-BOX. Background Art

[0002] In the research and development, testing and after-sales service of vehicle controllers, it is necessary to refresh and upgrade the programs and configuration data inside the vehicle controllers, repair the software defects of the application programs, or optimize the functional properties of the system. With the popularization of vehicle network buses, especially CAN bus technology, it has become a mainstream choice for diagnostic equipment to flash the programs or configuration data of vehicle controllers through the CAN bus.

[0003] At present, the existing controllers are often connected to the vehicle-mounted T-BOX directly. Two controllers need to use four interfaces of the vehicle-mounted T-BOX. In addition, there are generally a large number of controllers on a vehicle. If all of them are directly connected to the vehicle-mounted T-BOX, there will be high requirements on its carrying capacity and poor stability. Utility Model Content

[0004] In view of the above problems, the inventors have proposed a variety of solutions. The utility model provides a solution, which is a remote upgrade circuit based on a vehicle-mounted T-BOX to solve the problem in the prior art that the separate control of dual relays occupies more interfaces and the synchronization rate of the contact components is difficult to control.

[0005] The utility model is implemented by using the following technical scheme: a remote upgrade circuit based on a vehicle-mounted T-BOX, comprising a vehicle-mounted T-BOX, a relay, a first controller and a second controller; the vehicle-mounted T-BOX comprises a main CAN-L interface and a main CAN-H interface, the first controller comprises a first CAN-H interface and a second CAN-L interface, the second controller comprises a second CAN-L interface and a second CAN-H interface, the main CAN-H interface and the main CAN-L interface can be connected to the first CAN-H interface and the first CAN-L interface respectively through a relay, or can be connected to the second CAN-H interface and the second CAN-L interface respectively through a relay.

[0006] A relay is used to control the connection between the first controller, the second controller and the vehicle-mounted T-BOX, so that the device occupies fewer interfaces of the vehicle-mounted T-BOX, improving the utilization rate of the interface, and a relay control makes the conversion between controllers more sensitive.

[0007] Furthermore, the relay includes a control end and a controlled end, the controlled end includes a first contact assembly and a second contact assembly, the control end of the relay has a positive electrode electrically connected to the vehicle-mounted T-BOX and a negative electrode grounded, one end of the first contact assembly is electrically connected to the main CAN-H interface, and the other end can be selectively connected to the first CAN-H interface or the second CAN-H interface; one end of the second contact assembly is electrically connected to the main CAN-L interface, and the other end can be selectively connected to the first CAN-L interface or the second CAN-L interface. By controlling two contact assemblies through one control end, the synchronization rate of the two lines is improved.

[0008] Furthermore, when the control end of the relay is not powered, the first contact assembly connects the first CAN-H interface with the main CAN-H interface, and the second contact assembly connects the first CAN-L interface with the main CAN-L interface; when the control end is powered, the first contact assembly connects the second CAN-H interface with the main CAN-H interface, and the second contact assembly connects the second CAN-L interface with the main CAN-L interface. By setting the first controller as the default controller, when the first controller needs to be upgraded, it only needs to transmit the flashing instruction. When the second controller needs to be flashed, the vehicle-mounted T-BOX control relay is powered on, thereby realizing the flashing of the second controller.

[0009] Furthermore, the first contact assembly includes a first normally closed contact, a first normally open contact and a first armature, and the second contact assembly includes a second normally closed contact, a second normally open contact and a second armature; the first normally closed contact is connected to the first CAN-H interface, the first normally open contact is connected to the second CAN-H interface, and the first armature is connected to the main CAN-H interface; the second normally closed contact is connected to the first CAN-L interface, the second normally open contact is connected to the second CAN-L interface, and the second armature is connected to the main CAN-L interface. Through the above structure, the relay of the device can control the on and off of four lines, thereby improving the control accuracy of the device.

[0010] Furthermore, when the control end is not powered, the first armature is connected to the first normally closed contact, and the second armature is connected to the second normally closed contact; when the control end is powered, the first armature is connected to the first normally open contact, and the second armature is connected to the second normally open contact.

[0011] Furthermore, the positive electrodes of the vehicle-mounted T-BOX, the first controller, and the second controller are all electrically connected to a power source, and the negative electrodes are all grounded. The power source is used to supply power to the entire system.

[0012] To sum up, the beneficial effect of the utility model is that the utility model realizes the flash upgrade of two different controllers by using one relay. Compared with two relays, fewer interfaces are required when one relay in the device is connected to the vehicle-mounted T-BOX, and under the control of one relay, the first contact assembly and the second contact assembly are controlled by a common control terminal, so that the synchronization rate of the device is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall circuit structure principle of the utility model;

[0014] Figure 2 This is a schematic diagram of the circuit structure principle of the relay.

[0015] In the figure: 1. power supply; 3. main CAN-L interface; 4. main CAN-H interface; 5. relay control line; 6. first contact assembly; 7. relay; 8. control end; 9. second contact assembly; 10. first CAN-L interface; 11. first controller; 12. second CAN-L interface; 13. second controller; 14. first CAN-H interface; 15. second CAN-H interface; 16. first normally closed contact; 17. first armature; 18. first normally open contact; 19. second normally open contact; 20. second armature; 21. second normally closed contact. DETAILED DESCRIPTION

[0016] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0017] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are 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, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0018] The following is a description of preferred embodiments of the present invention in conjunction with the accompanying drawings.

[0019] like Figure 1As shown, the remote upgrade circuit based on the vehicle-mounted T-BOX of the utility model includes a vehicle-mounted T-BOX and a relay 7 electrically connected to the vehicle-mounted T-BOX, a first controller 11, and a second controller 13; wherein the vehicle-mounted T-BOX includes a main CAN-H interface 4 and a second CAN-L interface 12, the first controller 11 includes a first CAN-H interface 14 and a first CAN-L interface 10, and the second controller 13 includes a second CAN-H interface 15 and a second CAN-L interface 12; the main CAN-H interface 4 and the main CAN-L interface 3 can be connected to the first CAN-H interface 14 and the first CAN-L interface 10 respectively through the relay 7, or can be connected to the second CAN-H interface 15 and the second CAN-L interface 12 respectively through the relay 7.

[0020] like Figure 1 As shown, as a further explanation of this example, the relay 7 in the utility model includes a control end 8 and a controlled end, the control end 8 has a positive electrode electrically connected to the vehicle-mounted T-BOX and a negative electrode grounded, wherein the controlled end is composed of a first contact assembly 6 and a second contact assembly 9, one end of the first contact assembly 6 is electrically connected to the main CAN-H interface 4, and the other end of the first contact assembly 6 can be selectively electrically connected to the first CAN-H interface 14 or the second CAN-H interface 15; one end of the second contact assembly 9 is electrically connected to the main CAN-L interface 3, and the other end of the second contact assembly 9 can be selectively electrically connected to the first CAN-L interface 10 or the second CAN-L interface 12. The first contact assembly 6 and the second contact assembly 9 will only be electrically connected to the same controller, for example, when the first contact assembly 6 is electrically connected to the first CAN-H interface 14, then the second contact assembly 9 will also be electrically connected to the first CAN-L interface 10 at this time. By using a relay 7 to realize the signal on and off between the vehicle-mounted T-BOX and the two controllers, the device has fewer requirements for the vehicle-mounted T-BOX interface and increases the utilization rate of the interface.

[0021] like Figure 1 and Figure 2As shown, as a further illustration of this example, the first contact assembly 6 includes a first normally closed contact 16, a first normally open contact 18 and a first armature 17, and the second contact assembly 6 includes a second normally closed contact 21, a second normally open contact 19, and a second armature 20; the first normally closed contact 16 is connected to the first CAN-H interface 14, the first normally open contact 18 is connected to the second CAN-H interface 15, and the first armature 17 is connected to the main CAN-H interface 4; the second normally closed contact 21 is connected to the first CAN-L interface 10, the second normally open contact 19 is connected to the second CAN-L interface 12, and the second armature 20 is connected to the main CAN-L interface 3. When the first armature 17 contacts the first normally closed contact 16, the first CAN-H interface 14 is connected to the main CAN-H interface 4, the second armature 20 contacts the second normally closed contact 21, and the first CAN-L interface 10 is connected to the main CAN-L interface 3; when the first armature 17 contacts the first normally open contact 18, the second CAN-H interface 15 is connected to the main CAN-H interface 4, the second armature 20 contacts the second normally open contact 19, and the second CAN-L interface 12 is connected to the main CAN-L interface 3. The control terminal 8 in the relay 7 is located on the side close to the first normally open contact 18 and the second normally open contact 19.

[0022] like Figure 1 As shown, as a further explanation of this example, the device also includes a power supply 1 for powering the circuit system, the power supply 1 is electrically connected to the positive pole of the vehicle-mounted T-BOX, the first controller 11, and the second controller 13, the vehicle-mounted T-BOX is electrically connected to the positive pole of the relay 7 through the relay control line 5 and controls the on-off of the relay 7, specifically, one end of the relay control line 5 is connected to the vehicle-mounted T-BOX, the other end of the relay control line 5 is electrically connected to the positive pole of the control terminal 8 of the relay 7, and the control terminal 8, the vehicle-mounted T-BOX, the first controller 11, and the negative pole of the second controller 13 are all grounded. By controlling the on-off of the relay 7 electricity through the vehicle-mounted T-BOX, the on-off of the signal transmission of the first controller 11 and the second controller 13 is realized, making the switching more convenient, and the relay 7 is directly controlled by the vehicle-mounted T-BOX, so that the switching reaction of the relay 7 is faster.

[0023] like Figure 1 and Figure 2As shown, as a further explanation of this example, in the utility model, the first controller 11 is set as the default controller, that is, when the control end 8 of the relay 7 is not powered, the first CAN-H interface 14 is connected to the main CAN-H interface 4 through the first contact assembly 6, and the first CAN-L interface 10 is connected to the main CAN-L interface 3 through the second contact assembly 9; when current is passed through the control end 8, under the action of the magnetic field, the line between the first controller 11 and the vehicle-mounted T-BOX is disconnected, the second CAN-H interface 15 is connected to the main CAN-H interface 4, the second CAN-L interface 12 is connected to the main CAN-L interface 3, and the second controller 13 is connected to the vehicle-mounted T-BOX, thereby realizing the flashing of the first controller 11. Specifically, in the relay 7, when the control terminal 8 is not energized, the first armature 17 is connected to the first normally closed contact 16, and the second armature 20 is connected to the second normally closed contact 21; when the control terminal 8 is energized, the first armature 17 is connected to the first normally open contact 18, and the second armature 20 is connected to the second normally open contact 19.

[0024] The working principle of the utility model circuit is: Figure 1 In the initial state, the relay 7 is not energized, and the signal transmission line between the vehicle-mounted T-BOX and the first controller 11 is connected. When the first controller 11 needs to be remotely upgraded, the vehicle-mounted T-BOX only needs to receive the upgrade instruction issued by the platform, and then automatically modify the baud rate that is compatible with the first controller 11, and then upgrade the first controller 11; when the vehicle-mounted T-BOX receives the upgrade instruction of the second controller 13 issued by the platform, the vehicle-mounted T-BOX self-modifies the baud rate of the second controller 13, and then the vehicle-mounted T-BOX controls the relay 7 to be energized. At this time, the signal transmission between the second controller 13 and the vehicle-mounted T-BOX is connected, thereby realizing the upgrade of the second controller 13; when the flashing of the second controller 13 is completed, the vehicle-mounted T-BOX controls the relay 7 to be de-energized again, so that the vehicle-mounted T-BOX is reconnected with the first controller 11, so as to facilitate the next flashing.

[0025] In summary, the remote upgrade circuit based on the vehicle-mounted T-BOX of the utility model uses a relay 7 to realize the switching of signal transmission between two different controllers and the vehicle-mounted T-BOX. Compared with the direct connection between the controller and the vehicle-mounted T-BOX, fewer interfaces are required when a relay 7 in the device is connected to the vehicle-mounted T-BOX, and under the control of a relay 7, the first contact assembly 6 and the second contact assembly 9 are controlled by a common control terminal 8, so that the synchronization rate of the device is better.

[0026] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A remote upgrade circuit based on a vehicle-mounted T-BOX, characterized in that: The invention comprises a vehicle-mounted T-BOX, a relay (7), a first controller (11) and a second controller (13); the vehicle-mounted T-BOX comprises a main CAN-L interface (3) and a main CAN-H interface (4); the first controller (11) comprises a first CAN-H interface (14) and a second CAN-L interface (12); the second controller (13) comprises a second CAN-L interface (12) and a second CAN-H interface (15); the main CAN-H interface (4) and the main CAN-L interface (3) can respectively connect to the first CAN-H interface (14) and the first CAN-L interface (10) through the relay (7), or can respectively connect to the second CAN-H interface (15) and the second CAN-L interface (12) through the relay (7).

2. The remote upgrade circuit based on vehicle-mounted T-BOX according to claim 1 is characterized in that: The relay (7) comprises a control end (8) and a controlled end, the controlled end comprising a first contact assembly (6) and a second contact assembly (9), the control end (8) of the relay (7) having a positive electrode electrically connected to the vehicle-mounted T-BOX and a negative electrode grounded, one end of the first contact assembly (6) being electrically connected to the main CAN-H interface (4) and the other end being selectively connected to the first CAN-H interface (14) or the second CAN-H interface (15); one end of the second contact assembly (9) being electrically connected to the main CAN-L interface (3) and the other end being selectively connected to the first CAN-L interface (10) or the second CAN-L interface (12).

3. The remote upgrade circuit based on vehicle-mounted T-BOX according to claim 2 is characterized in that: When the control end (8) of the relay (7) is not powered, the first contact assembly (6) connects the first CAN-H interface (14) to the main CAN-H interface (4), and the second contact assembly (9) connects the first CAN-L interface (10) to the main CAN-L interface (3); when the control end (8) is powered, the first contact assembly (6) connects the second CAN-H interface (15) to the main CAN-H interface (4), and the second contact assembly (9) connects the second CAN-L interface (12) to the main CAN-L interface (3).

4. The remote upgrade circuit based on vehicle-mounted T-BOX according to claim 3 is characterized in that: The first contact assembly (6) comprises a first normally closed contact (16), a first normally open contact (18) and a first armature (17); the second contact assembly (9) comprises a second normally closed contact (21), a second normally open contact (19) and a second armature (20); the first normally closed contact (16) is connected to the first CAN-H interface (14), the first normally open contact (18) is connected to the second CAN-H interface (15), and the first armature (17) is connected to the main CAN-H interface (4); the second normally closed contact (21) is connected to the first CAN-L interface (10), the second normally open contact (19) is connected to the second CAN-L interface (12), and the second armature (20) is connected to the main CAN-L interface (3).

5. The remote upgrade circuit based on vehicle-mounted T-BOX according to claim 4 is characterized in that: When the control end (8) is not powered, the first armature (17) is connected to the first normally closed contact (16), and the second armature (20) is connected to the second normally closed contact (21); when the control end (8) is powered, the first armature (17) is connected to the first normally open contact (18), and the second armature (20) is connected to the second normally open contact (19).

6. The remote upgrade circuit based on vehicle-mounted T-BOX according to claim 1 is characterized in that: The positive electrodes of the vehicle-mounted T-BOX, the first controller (11) and the second controller (13) are all electrically connected to the power supply (1), and the negative electrodes are all grounded.

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