Diagnostic device with DOIP transceiver function

Abstract

The present invention relates to a diagnostic device with a DOIP transceiver function. The diagnostic device with a DOIP transceiver function described in the present invention comprises: an OBD interface, wherein the OBD interface has three OBD port groups; a DOIP module, wherein the DOIP module has two DOIP port groups; a switching module, wherein the switching module is electrically connected to one of the two DOIP port groups and two of the three OBD port groups, respectively, and the switching module is used to control the conduction between one of the two DOIP port groups and one of the two of the three OBD port groups; a switch module, wherein the switch module is electrically connected to the other of the two DOIP port groups and the other of the three OBD port groups, respectively, and the switch module is used to control the conduction between the other of the two DOIP port groups and the other of the three OBD port groups. The diagnostic device with a DOIP transceiver function described in the present invention has the advantage of being applicable to the diagnosis of various vehicle models.

Description

Technical Field

[0001] The present invention relates to the field of vehicle diagnosis, and in particular to a diagnostic device with DOIP transceiver functions. Background Art

[0002] OBD stands for On-Board Diagnostic, or "on-board diagnostic system." This system monitors the operating status of the engine and the exhaust aftertreatment system at all times, and immediately issues an alert if it detects a situation that could cause emissions to exceed standards. When a system malfunction occurs, the Malfunction Indicator Light (MIL) or Check Engine warning light illuminates, and the OBD system stores the fault information in memory. This information can be retrieved as a fault code via external diagnostic equipment and diagnostic interfaces (OBDI, OBDII). Based on the fault code prompts, maintenance personnel can conduct targeted inspections of relevant parts, components, and circuits, quickly and accurately determining the nature and location of the fault.

[0003] Currently, when a vehicle's OBD is turned on and OBD information is diagnosed using a vehicle diagnostic instrument, the protocol type of the specific Electronic Control Unit (ECU) system on the vehicle is usually determined by sequentially scanning various vehicle communication protocols. For example, the Controller Area Network (CAN) protocol, Pulse Width Modulation (PWM) protocol, Variable Pulse Width (VPW) protocol, KWP protocol, and ISO9141 protocol are scanned in that order. If the vehicle has an ECU system that uses the KWP protocol as a communication protocol and an ECU system that uses the ISO9141 protocol as a communication protocol, the CAN protocol, PWM protocol, and VPW protocol must be scanned completely before the KWP protocol and ISO protocol are scanned. This determines that the vehicle has an ECU system that uses the KWP protocol as a communication protocol and an ECU system that uses the ISO9141 protocol as a communication protocol. Then, the KWP protocol and ISO9141 protocol are used to communicate with the corresponding ECU systems, respectively, to perform OBD information diagnosis on the vehicle.

[0004] Currently, OBD interfaces on the market have 16 pins, of which pins 1, 3, 6, 8, 9, 11, 12, 13, and 14 can be customized based on the manufacturer's specific needs. The applicant discovered that different vehicle models have different Ethernet pin configurations; specifically, some models define OBD interface pins 3 / 11 as Ethernet receive pins, while others define OBD interface pins 9 / 1 as Ethernet receive pins. Consequently, diagnostic personnel must use different vehicle diagnostic instruments for each vehicle model, which is inconvenient. Summary of the Invention

[0005] Based on this, an object of the present invention is to provide a diagnostic device with DOIP transceiver function, which can be applied to vehicle diagnosis of various types.

[0006] A diagnostic device with a DOIP transceiver function, the diagnostic device comprising: an OBD interface, the OBD interface comprising three OBD port groups; a DOIP module, the DOIP module comprising two DOIP port groups; a switching module, the switching module being electrically connected to one of the two DOIP port groups and two of the three OBD port groups, respectively, the switching module being used to control conduction between one of the two DOIP port groups and one of the two of the three OBD port groups; and a switch module, the switch module being electrically connected to the other of the two DOIP port groups and the other of the three OBD port groups, respectively, the switch module being used to control conduction between the other of the two DOIP port groups and the other of the three OBD port groups.

[0007] Furthermore, the three OBD port groups are respectively a first OBD port group, a second OBD port group, and a third OBD port group, the first OBD port group is used to send a pair of differential signals, the second OBD port group is used to send a pair of differential signals, and the third OBD port group is used to receive 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 to send a pair of differential signals to the OBD interface, and the second DOIP port group is used to receive a pair of differential signals to the OBD interface; the first DOIP port group is electrically connected to the first OBD port group and the second OBD port group through the switching module, and the second DOIP port group is electrically connected to the third OBD port group through the switch module.

[0008] Furthermore, 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.

[0009] Furthermore, the switching module includes: a first relay, which is arranged between the first DOIP port group and the first OBD port group, and is used to control the on and off of the first DOIP port group and the first OBD port group; a second relay, which is arranged between the first DOIP port group and the second OBD port group, and is used to control the on and off of the first DOIP port group and the second OBD port group.

[0010] Furthermore, 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.

[0011] Furthermore, the switch module includes a relay, and the second DOIP port group is electrically connected to the third OBD port group through the relay, and the relay is used to control the connection and disconnection of the second DOIP port group and the third OBD port group.

[0012] Furthermore, the DOIP module includes a DOIP transceiver, and the DOIP transceiver is electrically connected to the switching module and the switch module respectively.

[0013] Furthermore, the DOIP module further includes a network transformer having the first DOIP port group and the second DOIP port group, and the DOIP transceiver is connected to the switching module and the switch module respectively through the network transformer.

[0014] Furthermore, the OBD interface has an activation port, and the diagnostic device further includes a control module, which is electrically connected to the activation port, the DOIP module, the switching module, and the switch module respectively.

[0015] Furthermore, the diagnostic device also includes an internal power supply and a first switch circuit, wherein the controlled end of the first switch circuit is electrically connected to the control module, the input end of the first switch circuit is electrically connected to the internal power supply, and the output end of the first switch circuit is electrically connected to the activation port; the first switch circuit includes a first controlled switch and a second controlled switch, wherein the controlled end of the first controlled switch is electrically connected to the control module, the output end or the input end of the first controlled switch is electrically connected to the controlled end of the second controlled switch, the input end of the second controlled switch is electrically connected to the internal power supply, and the output end of the second controlled switch is electrically connected to the activation port; the first controlled switch is a transistor, and the second controlled switch is an optocoupler; the diagnostic device also includes a second switch The second switch circuit includes a third controlled switch and a fourth controlled switch, wherein the controlled end of the third controlled switch is electrically connected to the control module, the input end of the second switch circuit is electrically connected to the internal power supply, and the output end of the second switch circuit is electrically connected to the input end of the first switch circuit; the second switch circuit includes a third controlled switch and a fourth controlled switch, the controlled end of the third controlled switch is electrically connected to the control module, the input end or the output end of the third controlled switch is connected to the controlled end of the fourth controlled switch, the input end of the fourth controlled switch is electrically connected to the internal power supply, the output end of the fourth controlled switch is connected to the input end of the first switch circuit; the output end of the fourth controlled switch is electrically connected to the input end of the second controlled switch; the third controlled switch is a triode, and the fourth controlled switch is a triode. The diagnostic device also includes an input module, which is electrically connected to the control module and is used to input a first signal and a second signal to the control module; when the control module receives the first signal, the first DOIP port group is connected to the first OBD port group, and the first DOIP port group is disconnected from the second OBD port group; when the control module receives the second signal, the first DOIP port group is disconnected from the first OBD port group, and the first DOIP port group is connected to the second OBD port group.

[0016] For better understanding and implementation, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the diagnostic device according to this embodiment;

[0018] Figure 2 This is a schematic structural diagram of the DOIP module described in this embodiment;

[0019] Figure 3 Schematic diagram of the structure of the first relay according to this embodiment;

[0020] Figure 4 Schematic diagram of the structure of the second relay according to this embodiment;

[0021] Figure 5 is a structural diagram of the first switch circuit according to this embodiment;

[0022] Figure 6 is a structural diagram of the second switch circuit according to this embodiment;

[0023] Reference numerals:

[0024] 1. OBD interface; 11. Activation port; 12. First OBD port group; 13. Second OBD port group; 14. Third OBD port group; 2. Control module; 3. DOIP module; 31. First DOIP port group; 32. Second DOIP port group; 33. DOIP transceiver; 34. Network transformer; 4. Switching module; 41. First relay; 42. Second relay; 5. Switch module; 51. Third relay; 6. Internal power supply; 7. First switching circuit; 71. First controlled switch; 72. Second controlled switch; 8. Second switching circuit; 81. Third controlled switch; 82. Fourth controlled switch; 9. Input module. DETAILED DESCRIPTION

[0025] A diagnostic device with DOIP transceiver function, see Figures 1 to 6 The system comprises an OBD interface 1, a control module 2, a DOIP module 3, a switching module 4, and a switch module 5. The OBD interface 1 is used to connect to a vehicle fault diagnosis socket located on the vehicle. The OBD interface 1 has an activation port 11 and three OBD port groups. The activation port 11 is electrically connected to the vehicle fault diagnosis socket to send an activation signal to the vehicle. The OBD port group has two ports and is electrically connected to the vehicle fault diagnosis socket to receive or send a pair of differential signals to the vehicle. The output end of the control module 2 is electrically connected to the activation port 11 of the OBD interface 1. The control module 2 is used to send an activation signal to the vehicle to activate the vehicle's Ethernet function. The DOIP module 3 has two DOIP port groups, each with two ports. One of the two DOIP port groups is electrically connected to two of the three OBD port groups via the switching module 4, and the other of the two DOIP port groups is electrically connected to the other of the three OBD port groups via the switch module 5. The switching module 4 is electrically connected to the control module 2 and is used to control the connection between the DOIP port group and one of the two OBD port groups. The switch module 5 is electrically connected to the control module 2 , and is used to control the on / off of the DOIP port group and the OBD port group.

[0026] 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. The first OBD port group 12 is used to send a pair of differential signals to the car, the second OBD port group 13 is used to send a pair of differential signals to the car, and the third OBD port group 14 is used to receive a pair of differential signals from the car; the two DOIP port groups are a first DOIP port group 31 and a second DOIP port group 32. The first DOIP port group 31 is used to send a pair of differential signals to the OBD interface 1, and the second DOIP port group 32 is used to receive a pair of differential signals to the OBD interface 1; 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 switching module 4, and the second DOIP port group 32 is electrically connected to the third OBD port group 14 through the switch module 5.

[0027] In real life, some vehicle models define pins 3 / 11 of the vehicle fault diagnosis socket as Ethernet receive pins, while other models define pins 9 / 1 of the vehicle fault diagnosis socket as Ethernet receive pins. Therefore, when using the diagnostic device described in this embodiment, the first OBD port group 12 is electrically connected to pins 3 / 11 of the vehicle fault diagnosis socket, and the second OBD port group 13 is electrically connected to pins 9 / 1 of the vehicle fault diagnosis socket. Then, depending on the vehicle model, the switching module 4 is used to connect the first DOIP port group 31 to one of the first OBD port group 12 and the second OBD port group 13, thereby enabling diagnosis of different vehicle models. Next, the control module 2 sends an activation signal to the vehicle to activate the vehicle's Ethernet function. Finally, the DOIP module 3 sends or receives a differential signal to the vehicle.

[0028] See also Figures 1 to 6 The control module 2 includes but is not limited to one or any combination of MCU, MPU, DPU, CPU, ASIC, etc.

[0029] See also Figures 1 to 6 The DOIP module 3 includes a DOIP transceiver 33, which is electrically connected to the control module 2, the switching module 4, and the switch module 5. Furthermore, the DOIP module 3 may also include a network transformer 34, which has the first DOIP port group 31 and the second DOIP port group 32 described above. 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 switch module 5 respectively through the network transformer 34.

[0030] See also Figures 1 to 6The 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 via the relay, and the control module 2 is electrically connected to the relay. Specifically, the switching module 4 includes a first relay 41 and 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 is used to control the connection and disconnection between 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 is used to control the connection and disconnection between the first DOIP port group 31 and the second OBD port group 13. Furthermore, the control module 2 is electrically connected to the first relay 41 and the second relay 42, respectively, to control the operation of the first relay 41 and the second relay 42. In this embodiment, the first DOIP port group 31 is connected to the first OBD port group 12 through the first relay 41 , and the first DOIP port group 31 is connected to the second OBD port group 13 through the first relay 41 and the second relay 42 in sequence.

[0031] See also Figures 1 to 6 The switch module 5 includes at least one relay. The second DOIP port group 32 is electrically connected to the third OBD port group 14 via the relay, and the control module 2 is electrically connected to the relay. Specifically, the switch module 5 includes a third relay 51, which is disposed between the second DOIP port group 32 and the third OBD port group 14. The third relay 51 is used to control the connection between the second DOIP port group 32 and the third OBD port group 14. Furthermore, the control module 2 is electrically connected to the third relay 51 to control its operation.

[0032] See also Figures 1 to 6 The diagnostic device also includes an internal power supply 6 and a first switching circuit 7. The controlled end of the first switching circuit 7 is electrically connected to the control module 2, the input end of the first switching circuit 7 is electrically connected to the internal power supply 6, and the output end of the first switching circuit 7 is electrically connected to the activation port 11 of the OBD interface 1. The control module 2 controls the connection and disconnection between the internal power supply 6 and the vehicle through the first switching circuit 7. When the control module 2 sends a signal to the first switching circuit 7, the first switching circuit 7 is turned on, and the internal power supply 6 then outputs a voltage of 3V to 36V to the vehicle through the activation port 11 of the OBD interface 1, forming an activation signal for the vehicle and activating the vehicle's Ethernet function.

[0033] Specifically, the first switch circuit 7 includes at least one controlled switch, which can be an optocoupler, a transistor, a MOS transistor, etc. More specifically, the first switch circuit 7 includes a first controlled switch 71 and a second controlled switch 72. The controlled end of the first controlled switch 71 is electrically connected to the control module 2, the output end or the input end of the first controlled switch 71 is electrically connected to the controlled end of the second controlled switch 72, the input end of the second controlled switch 72 is electrically connected to the internal power supply 6, and the 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 transistor, and the second controlled switch 72 is an optocoupler.

[0034] See also Figures 1 to 6 Considering that the internal power supply 6 not only outputs a 3V to 36V voltage to the vehicle but also powers other electronic components of the diagnostic device, the diagnostic device also includes a second switching circuit 8, which is used to control whether the internal power supply 6 outputs a 3V to 36V voltage to the first switching circuit 7. The controlled end of the second switching circuit 8 is electrically connected to the control module 2, the input end of the second switching circuit 8 is electrically connected to the internal power supply 6, and the output end of the second switching circuit 8 is electrically connected to the input end of the first switching circuit 7. Specifically, the second switching circuit 8 includes at least one controlled switch, which may be an optocoupler, a transistor, a MOS transistor, or the like. More specifically, the second switching circuit 8 includes a third controlled switch 81 and a fourth controlled switch 82. The controlled end of the third controlled switch 81 is electrically connected to the control module 2, the input end or the output end of the third controlled switch 81 is connected to the controlled end of the fourth controlled switch 82, the input end of the fourth controlled switch 82 is electrically connected to the internal power supply 6, and the output end of the fourth controlled switch 82 is connected to the input end of the first switching circuit 7. In this embodiment, the output of the fourth controlled switch 82 is electrically connected to the input 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 conduct, and then the fourth controlled switch 82 to conduct. Subsequently, the internal power supply 6 can provide a voltage of 3V to 36V to the input of the second controlled switch 72.

[0035] See also Figures 1 to 6The diagnostic device also includes an input module 9, which is electrically connected to the control module 2 and is used 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 operation of the first relay 41 and the second relay 42, so that the first DOIP port group 31 is connected to the first OBD port group 12 and the first DOIP port group 31 is disconnected from the second OBD port group 13. When the control module 2 receives the second signal, the control module 2 controls the operation of the first relay 41 and the second relay 42, 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 connected to the second OBD port group 13. Specifically, the input module 9 can be a display screen, a physical button, a virtual button, etc.

[0036] The use process of the diagnostic device: First, the staff sends the first signal or the second signal to the control module 2 through the input module 9 according to different vehicle models; 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 connected to the corresponding OBD port group, and the second DOIP port group 32 is connected to the corresponding OBD port group; then, the control module 2 sends a signal to the first controlled switch 71 and the third controlled switch 81, and the first controlled switch 71 is turned on and the third controlled switch 81 is turned on; then, 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 voltage to the car and activates the Ethernet function of the car; finally, the DOIP transceiver 33 sends or receives data to the car.

[0037] The above-described embodiments merely illustrate several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, and all such variations and improvements fall within the scope of protection of the present invention.

Claims

1. A diagnostic device with DOIP transceiver function, characterized in that: The diagnostic device comprises: 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; A switching module (4), the switching module (4) being electrically connected to one of the two DOIP port groups and two of the three OBD port groups, respectively, and the switching module (4) being used to control conduction between one of the two DOIP port groups and one of the two OBD port groups; A switch module (5), the switch module (5) being electrically connected to the other of the two DOIP port groups and the other of the three OBD port groups, respectively, and the switch module (5) being used to control the on / off of the other of the two DOIP port groups and the other of the three OBD port groups; The OBD interface (1) has an activation port (11), and the diagnostic device further comprises a control module (2), wherein the control module (2) is electrically connected to the activation port (11), the DOIP module (3), the switching module (4), and the switch module (5), respectively.

2. The diagnostic device with DOIP transceiver function according to claim 1, characterized in that: 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 to send a pair of differential signals, the second OBD port group (13) is used to send a pair of differential signals, and the third OBD port group (14) is used to receive 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), wherein the first DOIP port group (31) is used to send a pair of differential signals to the OBD interface (1), and the second DOIP port group (32) is used to receive a pair of differential signals from the OBD interface (1); 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 switching module (4), and the second DOIP port group (32) is electrically connected to the third OBD port group (14) through the switch module (5); The diagnostic device further comprises an input module (9), the input module (9) being electrically connected to the control module (2), and the input module (9) being used to input a first signal and a second signal to the control module (2); when the control module (2) receives the first signal, the first DOIP port group (31) is connected to the first OBD port group (12), and the first DOIP port group (31) is disconnected from the second OBD port group (13); When the control module (2) receives the 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 connected to the second OBD port group (13).

3. The diagnostic device with DOIP transceiver function according to claim 2, characterized in that: The switching module (4) includes a relay, and the first DOIP port group (31) is electrically connected to the first OBD port group (12) and the second OBD port group (13) via the relay.

4. The diagnostic device with DOIP transceiver function according to claim 3, characterized in that: The switching module (4) comprises: a first relay (41), the first relay (41) being arranged between the first DOIP port group (31) and the first OBD port group (12), the first relay (41) being used for controlling the on / off of the first DOIP port group (31) and the first OBD port group (12); A second relay (42) is provided between the first DOIP port group (31) and the second OBD port group (13), and the second relay (42) is used to control the on / off of the first DOIP port group (31) and the second OBD port group (13).

5. The diagnostic device with DOIP transceiver function according to claim 4, characterized in that: The first DOIP port group (31) is connected to the first OBD port group (12) through the first relay (41), and the first DOIP port group (31) is connected to the second OBD port group (13) through the first relay (41) and the second relay (42) in sequence.

6. The diagnostic device with DOIP transceiver function according to claim 2, characterized in that: The switch module (5) comprises a relay, the second DOIP port group (32) is electrically connected to the third OBD port group (14) via the relay, and the relay is used to control the on / off of the second DOIP port group (32) and the third OBD port group (14).

7. The diagnostic device with DOIP transceiver function according to claim 2, characterized in that: The DOIP module (3) includes a DOIP transceiver (33), and the DOIP transceiver (33) is electrically connected to the switching module (4) and the switch module (5) respectively.

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

9. The diagnostic device with DOIP transceiver function according to claim 1, characterized in that: The diagnostic device further comprises an internal power supply (6), a first switch circuit (7), and a second switch circuit (8), wherein a controlled end of the first switch circuit (7) is electrically connected to the control module (2), and an output end of the first switch circuit (7) is electrically connected to the activation port (11); The controlled end of the second switch circuit (8) is electrically connected to the control module (2), the input end of the second switch circuit (8) is electrically connected to the internal power supply (6), and the output end of the second switch circuit (8) is electrically connected to the input end of the first switch circuit (7).

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