CN116149289A

CN116149289A - Diagnostic device with DOIP receiving and transmitting function

Info

Publication number: CN116149289A
Application number: CN202111389162.5A
Authority: CN
Inventors: 马欢; 刘润泽; 马朔
Original assignee: Guangzhou Yousheng Automobile Technology Co ltd
Current assignee: Guangzhou Yousheng Automobile Technology Co ltd
Priority date: 2021-11-22
Filing date: 2021-11-22
Publication date: 2023-05-23

Abstract

The present invention relates to a diagnostic device having a DOIP transmitting/receiving function. The diagnostic device with DOIP receiving and transmitting function of the invention comprises: an OBD interface having three OBD port sets; the DOIP module is provided with two DOIP port groups; the switching module is respectively and electrically connected with one of the two DOIP port groups and two of the three OBD port groups, and is used for controlling one of the two DOIP port groups to be conducted with one of the three OBD port groups; the switch module is electrically connected with the other one of the two DOIP port groups and the other one of the three OBD port groups respectively, and is used for controlling the on-off of the other one of the two DOIP port groups and the other one of the three OBD port groups. The diagnosis device with DOIP receiving and transmitting functions has the advantage of being suitable for diagnosis of various vehicle types.

Description

Diagnostic device with DOIP receiving and transmitting function

Technical Field

The invention relates to the field of vehicle diagnosis, in particular to a diagnosis device with a DOIP receiving and transmitting function.

Background

OBD is an abbreviation for English On-Board Diagnostic, i.e. "On-Board Diagnostic". The system can monitor the running condition of the engine and the working state of the tail gas aftertreatment system at any time, and can give out an alarm immediately once the condition that the emission is possibly out of standard is found. When the system fails, a fault lamp (MIL) or a Check Engine (Check Engine) warning lamp is turned on, and meanwhile, the OBD system stores fault information into a memory, and related information can be read in the form of fault codes through external diagnostic equipment and diagnostic interfaces (OBD I and OBDII). According to the prompt of the fault code, the maintenance personnel can check related parts, elements and circuits in a targeted manner, and the nature and the parts of the fault can be rapidly and accurately determined.

At present, when the vehicle OBD is started and the vehicle is diagnosed by the vehicle diagnostic apparatus, the protocol types of a specific electronic control unit (ElectronicControl Unit, ECU) system on the vehicle are usually determined by a mode of sequentially scanning various vehicle communication protocols, for example, the vehicle is scanned according to the sequence of a Controller local area network (Controller AreaNetwork, CAN) protocol, a pulse width modulation (Pulse Width Modulation, PWM) protocol, a variable pulse width modulation (Variable Pulse Width, VPW) protocol, a KWP protocol and an ISO9141 protocol, if the vehicle is provided with the ECU system using the KWP protocol as the communication protocol and the ECU system using the ISO9141 protocol as the communication protocol, the CAN protocol, the PWM protocol and the VPW protocol CAN be scanned to the KWP protocol and the ISO protocol after all scanning is completed, and the vehicle is determined to have the ECU system using the KWP protocol as the communication protocol and the ECU system using the ISO9141 protocol as the communication protocol, and then the OBP protocol and the ISO9141 protocol are respectively communicated with the corresponding ECU systems, so as to realize the diagnosis of the vehicle OBD information.

Currently, the OBD interface on the market has 16 pins, wherein

pins

1, 3, 6, 8, 9, 11, 12, 13, and 14 can be customized according to the actual situation of the manufacturer. The applicant found that the pin configuration of the ethernet is different for different vehicle models; in particular, one part of the vehicle type defines pin 3/11 of the OBD interface as an Ethernet receiving pin, and the other part of the vehicle type defines pin 9/1 of the OBD interface as an Ethernet receiving pin. Therefore, the staff needs to adopt different vehicle diagnostic apparatuses to diagnose the vehicle according to different vehicle types, and the use is inconvenient.

Disclosure of Invention

In view of the above, an object of the present invention is to provide a diagnostic device having a DOIP transmitting/receiving function, which can be applied to vehicle diagnostics of various vehicle types.

A diagnostic device having a DOIP transceiving function, the diagnostic device comprising: the OBD interface comprises three OBD port groups; the DOIP module comprises two DOIP port groups; the switching module is respectively and electrically connected with one of the two DOIP port groups and two of the three OBD port groups, and is used for controlling one of the two DOIP port groups to be conducted with one of the three OBD port groups; the switch module is electrically connected with the other one of the two DOIP port groups and the other one of the three OBD port groups respectively, and is used for controlling the on-off of the other one of the two DOIP port groups and the other one of the three OBD port groups.

Further, the three OBD port groups are a first OBD port group, a second OBD port group and a third OBD port group, respectively, where the first OBD port group is used for sending a pair of differential signals, the second OBD port group is used for sending a pair of differential signals, and the third OBD port group is used for receiving a pair of differential signals; the two DOIP port groups are respectively a first DOIP port group and a second DOIP port group, the first DOIP port group is used for sending a pair of differential signals to the OBD interface, and the second DOIP port group is used for receiving a pair of differential signals to the OBD interface; the first DOIP port group is electrically connected with the first OBD port group and the second OBD port group through the switching module, and the second DOIP port group is electrically connected with the third OBD port group through the switching module.

Further, the switching module includes a relay, and the first DOIP port group is electrically connected to the first OBD port group and the second OBD port group through the relay.

Further, the switching module includes: the first relay is arranged between the first DOIP port group and the first OBD port group and is used for controlling the on-off of the first DOIP port group and the first OBD port group; the second relay is arranged between the first DOIP port group and the second OBD port group and is used for controlling the on-off of the first DOIP port group and the second OBD port group.

Further, the first DOIP port group is connected to the first OBD port group through the first relay, and the first DOIP port group is connected to the second OBD port group through the first relay and the second relay in sequence.

Further, the switch module includes a relay, the second DOIP port group is electrically connected with the third OBD port group through the relay, and the relay is used for controlling on-off of the second DOIP port group and the third OBD port group.

Further, the DOIP module comprises a DOIP transceiver, and the DOIP transceiver is respectively and electrically connected with the switching module and the switching module.

Further, the DOIP module further includes a network transformer, the network transformer has the first DOIP port group and the second DOIP port group, and the DOIP transceiver is connected to the switching module and the switching module through the network transformer.

Further, the OBD interface has an activation port, and the diagnostic device further includes a control module, where the control module is electrically connected to the activation port, the DOIP module, the switching module, and the switching module, respectively.

Further, the diagnostic device further comprises an internal power supply and a first switch circuit, wherein a controlled end of the first switch circuit is electrically connected with the control module, an input end of the first switch circuit is electrically connected with the internal power supply, and an output end of the first switch circuit is electrically connected with the activation port; the first switch circuit comprises a first controlled switch and a second controlled switch, wherein the controlled end of the first controlled switch is electrically connected with the control module, the output end or the input end of the first controlled switch is electrically connected with the controlled end of the second controlled switch, the input end of the second controlled switch is electrically connected with the internal power supply, and the output end of the second controlled switch is electrically connected with the activation port; the first controlled switch is a triode, and the second controlled switch is an optocoupler; the diagnosis device further comprises a second switch circuit, wherein a controlled end of the second switch circuit is electrically connected with the control module, an input end of the second switch circuit is electrically connected with the internal power supply, and an output end of the second switch circuit is electrically connected with an input end of the first switch circuit; the second switch circuit comprises a third controlled switch and a fourth controlled switch, wherein the controlled end of the third controlled switch is electrically connected with the control module, the input end or the output end of the third controlled switch is electrically connected with the controlled end of the fourth controlled switch, the input end of the fourth controlled switch is electrically connected with the internal power supply, and the output end of the fourth controlled switch is electrically connected with the input end of the first switch circuit; the output end of the fourth controlled switch is electrically connected with the input end of the second controlled switch; the third controlled switch is a triode, and the fourth controlled switch is a triode. The diagnosis device further comprises an input module, wherein the input module is electrically connected with the control module and is used for inputting a first signal and a second signal to the control module; when the control module receives a first signal, the first DOIP port group is communicated with the first OBD port group, and the first DOIP port group is disconnected with the second OBD port group; when the control module receives a second signal, the first DOIP port group is disconnected from the first OBD port group, and the first DOIP port group is conducted with the second OBD port group.

For a better understanding and implementation, the present invention is described in detail below with reference to the drawings.

Drawings

Fig. 1 is a schematic structural view of a diagnostic device according to the present embodiment;

fig. 2 is a schematic structural diagram of a DOIP module according to the present embodiment;

fig. 3 is a schematic structural diagram of the first relay according to the present embodiment;

fig. 4 is a schematic structural diagram of the second relay according to the present embodiment;

fig. 5 is a schematic structural diagram of a first switch circuit according to the present embodiment;

fig. 6 is a schematic structural diagram of a second switch circuit according to the present embodiment;

reference numerals:

1. an OBD interface; 11. activating the port; 12. a first group of OBD ports; 13. a second group of OBD ports; 14. a third group of OBD ports; 2. a control module; 3. a DOIP module; 31. a first DOIP port group; 32. a second DOIP port group; 33. a DOIP transceiver; 34. a network transformer; 4. a switching module; 41. a first relay; 42. a second relay; 5. a switch module; 51. a third relay; 6. an internal power supply; 7. a first switching circuit; 71. a first controlled switch; 72. a second controlled switch; 8. a second switching circuit; 81. a third controlled switch; 82. a fourth controlled switch; 9. and an input module.

Detailed Description

A diagnostic device with DOIP transceiving function, see fig. 1 to 6, which comprises an OBD interface 1, a control module 2, a DOIP module 3, a switching module 4 and a switching module 5. The OBD interface 1 is used for accessing an automobile fault diagnosis seat on an automobile, the OBD interface 1 is provided with an activation port 11 and three OBD port groups, the activation port 11 is electrically connected with the automobile fault diagnosis seat to send activation signals to the automobile, and the OBD port groups are provided with two ports and are electrically connected with the automobile fault diagnosis seat to receive or send a pair of differential signals to the automobile. The output end of the control module 2 is electrically connected with the activation port 11 of the OBD interface 1, and the control module 2 is used for sending an activation signal to the automobile of the automobile to activate the ethernet function of the automobile. The DOIP module 3 has two DOIP port groups, the DOIP port groups have two ports, one of the two DOIP port groups is electrically connected with two of the three OBD port groups through the switching module 4, and the other of the two DOIP port groups is electrically connected with the other of the three OBD port groups through the switching module 5. The switching module 4 is electrically connected with the control module 2, and the switching module 4 is used for controlling the connection between the DOIP port group and one of the two OBD port groups. The switch module 5 is electrically connected with the control module 2, and the switch module 5 is used for controlling the on-off of the DOIP port group and the OBD port group.

In this embodiment, the three OBD port groups are a first OBD port group 12, a second OBD port group 13, and a third OBD port group 14, respectively, where the first OBD port group 12 is used for sending a pair of differential signals to the automobile, the second OBD port group 13 is used for sending a pair of differential signals to the automobile, and the third OBD port group 14 is used for receiving a pair of differential signals to the automobile; the two DOIP port groups are respectively a first DOIP port group 31 and a second DOIP port group 32, the first DOIP port group 31 is used for sending a pair of differential signals to the OBD interface 1, and the second DOIP port group 32 is used for receiving a pair of differential signals to the OBD interface 1; the first DOIP port set 31 is electrically connected to the first OBD port set 12 and the second OBD port set 13 through the switching module 4, and the second DOIP port set 32 is electrically connected to the third OBD port set 14 through the switching module 5.

In real life, one part of the vehicle model defines the pin 3/11 of the automobile fault diagnosis seat as an Ethernet receiving pin, and the other part of the vehicle model defines the pin 9/1 of the automobile fault diagnosis seat as an Ethernet receiving pin. Therefore, when the diagnostic device according to the present embodiment is used, the first OBD port group 12 is electrically connected to the pin 3/11 of the automobile fault diagnosis seat, and the second OBD port group 13 is electrically connected to the pin 9/1 of the automobile fault diagnosis seat; then, according to the vehicle type, the switching module 4 is utilized to realize that the first DOIP port group 31 is communicated with one OBD port group in the first OBD port group 12 and the second OBD port group 13, so that the diagnosis can be performed on vehicles of different vehicle types; then, the control module 2 sends an activation signal to the automobile to activate the Ethernet function of the automobile; finally, the DOIP module 3 sends or receives differential signals to the car.

Referring to fig. 1-6, the control module 2 includes, but is not limited to, a combination of one or more of MCU, MPU, DPU, CPU, ASIC, etc.

Referring to fig. 1 to 6, the DOIP module 3 includes a DOIP transceiver 33, and the DOIP transceiver 33 is electrically connected to the control module 2, the switching module 4, and the switching module 5, respectively. Further, the DOIP module 3 may further include a network transformer 34, where the network transformer 34 has the first DOIP port group 31 and the second DOIP port group 32, and the DOIP transceiver 33 is electrically connected to the network transformer 34, and the DOIP transceiver 33 is connected to the switching module 4 and the switching module 5 through the network transformer 34.

Referring to fig. 1 to 6, the switching module 4 includes at least one relay, the first DOIP port group 31 is electrically connected to the first OBD port group 12 and the second OBD port group 13 through the relay, and the control module 2 is electrically connected to the relay. Specifically, the switching module 4 includes a first relay 41, a second relay 42; the first relay 41 is disposed between the first DOIP port group 31 and the first OBD port group 12, and the first relay 41 is configured to control on-off of the first DOIP port group 31 and the first OBD port group 12; the second relay 42 is disposed between the first DOIP port group 31 and the second OBD port group 13, and the second relay 42 is used for controlling the on-off of the first DOIP port group 31 and the second OBD port group 13; the control module 2 is electrically connected to the first relay 41 and the second relay 42, respectively, to control the operations of the first relay 41 and the second relay 42. In the present embodiment, the first DOIP port group 31 passes through the first relay 41 to be connected with the first OBD port group 12, and the first DOIP port group 31 passes through the first relay 41 and the second relay 42 in order to be connected with the second OBD port group 13.

Referring to fig. 1 to 6, the switch module 5 includes at least one relay through which the second DOIP port group 32 is electrically connected to the third OBD port group 14, and the control module 2 is electrically connected to the relay. Specifically, the switch module 5 includes a third relay 51, where the third relay 51 is disposed between the second DOIP port group 32 and the third OBD port group 14, and the third relay 51 is used to control on-off of the second DOIP port group 32 and the third OBD port group 14; and, the control module 2 is electrically connected with the third relay 51 to control the operation of the third relay 51.

Referring to fig. 1 to 6, the diagnostic apparatus further includes an internal power supply 6, a first switching circuit 7. The controlled end of the first switch circuit 7 is electrically connected with the control module 2, the input end of the first switch circuit 7 is electrically connected with the internal power supply 6, and the output end of the first switch circuit 7 is electrically connected with the activation port 11 of the OBD interface 1. The control module 2 controls the on-off between the internal power supply 6 and the automobile through the first switch circuit 7, when the control module 2 sends a signal to the first switch circuit 7, the first switch circuit 7 is turned on, then the internal power supply 6 outputs 3V to 36V voltage to the automobile through the activation port 11 of the OBD interface 1, an activation signal to the automobile is formed, and the Ethernet function of the automobile is activated.

Specifically, the first switching circuit 7 includes at least one controlled switch, which may be an optocoupler, a triode, a MOS transistor, or the like. More specifically, the first switch circuit 7 includes a first controlled switch 71 and a second controlled switch 72, where a controlled end of the first controlled switch 71 is electrically connected to the control module 2, an output end or an input end of the first controlled switch 71 is electrically connected to a controlled end of the second controlled switch 72, an input end of the second controlled switch 72 is electrically connected to the internal power supply 6, and an output end of the second controlled switch 72 is electrically connected to the activation port 11 of the OBD interface 1; the first controlled switch 71 is a triode, and the second controlled switch 72 is an optocoupler.

Referring to fig. 1 to 6, considering that the internal power supply 6 supplies power to other electronic components of the diagnostic apparatus in addition to the 3V to 36V voltage to the automobile, the diagnostic apparatus further includes a second switching circuit 8 for controlling whether the internal power supply 6 outputs the 3V to 36V voltage to the first switching circuit 7. The controlled end of the second switch circuit 8 is electrically connected with the control module 2, the input end of the second switch circuit 8 is electrically connected with the internal power supply 6, and the output end of the second switch circuit 8 is electrically connected with the input end of the first switch circuit 7. In particular, the second switching circuit 8 comprises at least one controlled switch, which may be an optocoupler, a triode, a MOS transistor, etc. More specifically, the second switch circuit 8 includes a third controlled switch 81 and a fourth controlled switch 82, where a controlled end of the third controlled switch 81 is electrically connected to the control module 2, an input end or an output end of the third controlled switch 81 is electrically connected to a controlled end of the fourth controlled switch 82, an input end of the fourth controlled switch 82 is electrically connected to the internal power supply 6, and an output end of the fourth controlled switch 82 is electrically connected to an input end of the first switch circuit 7. In this embodiment, the output end of the fourth controlled switch 82 is electrically connected to the input end of the second controlled switch 72, the third controlled switch 81 is a triode, and the fourth controlled switch 82 is a triode. The control module 2 controls the third controlled switch 81 to be turned on, then the fourth controlled switch 82 to be turned on, and then the internal power supply 6 may supply a voltage of 3V to 36V to the input terminal of the second controlled switch 72.

Referring to fig. 1 to 6, the diagnostic device further includes an input module 9, the input module 9 is electrically connected to the control module 2, and the input module 9 is configured to input a first signal and a second signal to the control module 2. When the control module 2 receives the first signal, the control module 2 controls the first relay 41 and the second relay 42 to operate, so that the first DOIP port group 31 is conducted with the first OBD port group 12, and the first DOIP port group 31 is disconnected with the second OBD port group 13. When the control module 2 receives the second signal, the control module 2 controls the first relay 41 and the second relay 42 to operate, so that the first DOIP port group 31 is disconnected from the first OBD port group 12, and the first DOIP port group 31 is conducted with the second OBD port group 13. In particular, the input module 9 may be a display screen, physical keys, virtual keys, etc.

The use process of the diagnostic device comprises the following steps: firstly, a worker sends a first signal or a second signal to the control module 2 through the input module 9 according to different vehicle types; then, the control module 2 controls the first relay 41, the second relay 42 and the third relay 51 to work, so that the first DOIP port group 31 is conducted with the corresponding OBD port group, and the second DOIP port group 32 is conducted with the corresponding OBD port group; then, the control module 2 sends signals to the first controlled switch 71 and the third controlled switch 81, the first controlled switch 71 is turned on, and the third controlled switch 81 is turned on; next, the second controlled switch 72 is turned on, and the fourth controlled switch 82 is turned on, so that the internal power supply 6 inputs a voltage to the automobile, activating the ethernet function of the automobile; finally, the DOIP transceiver 33 transmits or receives data to or from the automobile.

The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention.

Claims

1. A diagnostic device having a DOIP transceiver function, the diagnostic device comprising:

an OBD interface (1), the OBD interface (1) comprising three OBD port groups;

a DOIP module (3), the DOIP module (3) comprising two DOIP port groups;

the switching module (4) is respectively and electrically connected with one of the two DOIP port groups and two of the three OBD port groups, and the switching module (4) is used for controlling one of the two DOIP port groups to be conducted with one of the three OBD port groups;

the switch module (5), switch module (5) are respectively with another one of two DOIP port groups, another one of three OBD port groups electric connection, switch module (5) are used for controlling another one of two DOIP port groups and another one of three OBD port groups break-make.

2. The diagnostic device with DOIP transceiving functionality according to claim 1, wherein:

the three OBD port groups are respectively a first OBD port group (12), a second OBD port group (13) and a third OBD port group (14), the first OBD port group (12) is used for sending a pair of differential signals, the second OBD port group (13) is used for sending a pair of differential signals, and the third OBD port group (14) is used for receiving a pair of differential signals;

the two DOIP port groups are respectively a first DOIP port group (31) and a second DOIP port group (32), the first DOIP port group (31) is used for sending a pair of differential signals to the OBD interface (1), and the second DOIP port group (32) is used for receiving a pair of differential signals from the OBD interface (1);

the first DOIP port group (31) is electrically connected with the first OBD port group (12) and the second OBD port group (13) through the switching module (4), and the second DOIP port group (32) is electrically connected with the third OBD port group (14) through the switching module (5).

3. The diagnostic device with DOIP transceiving functionality according to claim 2, wherein: the switching module (4) comprises a relay, and the first DOIP port group (31) is electrically connected with the first OBD port group (12) and the second OBD port group (13) through the relay.

4. A diagnostic device with DOIP transceiving functionality according to claim 3, characterized in that said switching module (4) comprises:

the first relay (41) is arranged between the first DOIP port group (31) and the first OBD port group (12), and the first relay (41) is used for controlling the on-off of the first DOIP port group (31) and the first OBD port group (12);

the second relay (42), second relay (42) set up first DOIP port group (31) with between the OBD port group (13), second relay (42) are used for controlling first DOIP port group (31) with the break-make of OBD port group (13).

5. The diagnostic device with DOIP transceiving functionality according to claim 4, wherein: the first DOIP port group (31) passes through the first relay (41) to be connected with the first OBD port group (12), and the first DOIP port group (31) passes through the first relay (41) and the second relay (42) in sequence to be connected with the second OBD port group (13).

6. The diagnostic device with DOIP transceiving functionality according to claim 2, wherein: the switch module (5) comprises a relay, the second DOIP port group (32) is electrically connected with the third OBD port group (14) through the relay, and the relay is used for controlling the on-off of the second DOIP port group (32) and the third OBD port group (14).

7. The diagnostic device with DOIP transceiving functionality according to claim 2, wherein: the DOIP module (3) comprises a DOIP transceiver (33), and the DOIP transceiver (33) is electrically connected with the switching module (4) and the switching module (5) respectively.

8. The diagnostic device with DOIP transceiving functionality according to claim 7, wherein: the DOIP module (3) further comprises a network transformer (34), the network transformer (34) is provided with the first DOIP port group (31) and the second DOIP port group (32), and the DOIP transceiver (33) is connected with the switching module (4) and the switching module (5) through the network transformer (34) respectively.

9. The diagnostic device with DOIP transceiving functionality according to claim 2, wherein: the OBD interface (1) is provided with an activation port (11), the diagnosis device further comprises a control module (2), and the control module (2) is respectively and electrically connected with the activation port (11), the DOIP module (3), the switching module (4) and the switching module (5).

10. The diagnostic device with DOIP transceiving functionality according to claim 9, wherein:

the diagnosis device further comprises an internal power supply (6), a first switch circuit (7) and a second switch circuit (8), wherein the controlled end of the first switch circuit (7) is electrically connected with the control module (2), and the output end of the first switch circuit (7) is electrically connected with the activation port (11);

the controlled end of the second switch circuit (8) is electrically connected with the control module (2), the input end of the second switch circuit (8) is electrically connected with the internal power supply (6), and the output end of the second switch circuit (8) is electrically connected with the input end of the first switch circuit (7);

the diagnosis device further comprises an input module (9), wherein the input module (9) is electrically connected with the control module (2), and the input module (9) is used for inputting a first signal and a second signal to the control module (2); when the control module (2) receives a first signal, the first DOIP port group (31) is communicated with the first OBD port group (12), and the first DOIP port group (31) is disconnected with the second OBD port group (13); when the control module (2) receives a second signal, the first DOIP port group (31) is disconnected from the first OBD port group (12), and the first DOIP port group (31) is conducted with the second OBD port group (13).