CN211956215U - Automobile Ethernet interface diagnosis device - Google Patents
Automobile Ethernet interface diagnosis device Download PDFInfo
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- CN211956215U CN211956215U CN202020516411.7U CN202020516411U CN211956215U CN 211956215 U CN211956215 U CN 211956215U CN 202020516411 U CN202020516411 U CN 202020516411U CN 211956215 U CN211956215 U CN 211956215U
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Abstract
The utility model provides an automobile Ethernet interface diagnosis device, which comprises an OBD interface, a first indicator light, a second indicator light, a third indicator light and a signal receiving and transmitting processor, wherein the power end of the OBD interface is connected with the anode of the first indicator light, the anode of the second indicator light and the power end of the signal receiving and transmitting processor; the grounding end in the OBD interface is connected with the negative electrode of the first indicator light and the grounding end of the signal receiving and transmitting processor; an activation end in the OBD interface is connected with a negative electrode of the second indicator light; a transmitting end and a receiving end in the OBD interface are respectively and correspondingly connected with a receiving end and a transmitting end of the signal receiving and transmitting processor; the signal receiving and transmitting processor is connected with the third indicator light, and outputs a first signal to light the third indicator light when the Ethernet data connection is successful. The utility model provides a car ethernet interface diagnostic device can see the trouble problem directly perceivedly, need not to spend too much time or action and seeks, and it is very convenient, swift to use.
Description
Technical Field
The utility model relates to a car OBD detection area especially relates to a car ethernet interface diagnostic device.
Background
The network technology is widely applied to On-Board Diagnostic (OBD) communication, the existing Ethernet Diagnostic Over Internet Protocol (DOIP) communication is one of On-Board OBD Diagnostic communication, due to the fact that signals required by the communication are complex, faults occur, and a plurality of detection items are needed, at present, workers commonly replace equipment firstly, if the problems cannot be solved, the data of the On-Board OBD (DOIP) of an automobile are detected and are subjected to one-to-one troubleshooting, the whole troubleshooting process is long, the troubleshooting workload is increased invisibly, troubleshooting time is prolonged, and working efficiency is reduced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a car ethernet interface diagnostic device can reduce troubleshooting work load, shorten the investigation time, improves work efficiency.
The utility model provides an automobile Ethernet interface diagnosis device, in particular to an automobile Ethernet interface diagnosis device which comprises an OBD interface, a first indicator light, a second indicator light, a third indicator light and a signal receiving and transmitting processor; the power supply end in the OBD interface is connected with the anode of the first indicator light, the anode of the second indicator light and the power supply end of the signal transceiving processor; a grounding end in the OBD interface is connected with a negative electrode of the first indicator light and a grounding end of the signal receiving and transmitting processor; an activation end in the OBD interface is connected with a negative electrode of the second indicator light; a transmitting end and a receiving end in the OBD interface are respectively and correspondingly connected with a receiving end and a transmitting end of the signal receiving and transmitting processor; the signal receiving and transmitting processor is connected with the third indicator light, and outputs a first signal to enable the third indicator light to be turned on when the Ethernet data connection is successful.
Furthermore, the automobile Ethernet interface diagnosis device also comprises a fourth indicator light, the signal transceiving processor is connected with the fourth indicator light, and when the Ethernet transceiving circuit is electrically connected successfully, a second signal is output to enable the fourth indicator light to be lightened.
Further, the second signal is a direct current signal.
Further, the first signal is an alternating current signal.
Furthermore, the automobile Ethernet interface diagnosis device further comprises a first switch piece, and a power supply end in the OBD interface is respectively connected with the anode of the first indicator lamp, the anode of the second indicator lamp and the power supply end of the signal transceiving processor through the first switch piece.
Furthermore, the automobile Ethernet interface diagnosis device also comprises a second switch piece, and an activation end in the OBD interface is connected with a negative electrode of the second indicator light through the second switch piece.
Furthermore, the automobile Ethernet interface diagnosis device further comprises a third switch piece and a fourth switch piece, the transmitting end in the OBD interface is correspondingly connected with the receiving end of the signal receiving and transmitting processor through the third switch piece, and the receiving end in the OBD interface is correspondingly connected with the transmitting end of the signal receiving and transmitting processor through the fourth switch piece.
Furthermore, a transmitting end and a receiving end in the OBD interface are both differential signal ends, and the third switch element and the fourth switch element are both double-pole double-throw switches.
Furthermore, the automobile Ethernet interface diagnosis device also comprises a control module, wherein the control module is connected with the control end of the switch piece so as to control the on-off of the switch piece.
Furthermore, the control module is a key switch, and the switch part is a relay.
The utility model provides a car ethernet interface diagnostic device can see the trouble problem directly perceivedly, need not to spend too much time or action and seeks to reach and reduce troubleshooting work load, shorten the troubleshooting time, improve work efficiency's purpose, it is very convenient, swift to use on-vehicle.
Drawings
Fig. 1 is a first structural diagram of an ethernet interface diagnosis apparatus for a vehicle according to an embodiment of the present invention.
Fig. 2 is a second structural diagram of the ethernet interface diagnosis apparatus according to an embodiment of the present invention.
Fig. 3 is a third structural diagram of the ethernet interface diagnosis apparatus according to an embodiment of the present invention.
Fig. 4 is a fourth structural diagram of the ethernet interface diagnosis apparatus according to an embodiment of the present invention.
Icon: 10 — an OBD interface; b3-the positive transmitting terminal in the OBD interface; b4 — ground in OBD interface; b8 — activation end in OBD interface; b11-the transmitting negative terminal in the OBD interface; b12 — positive receiving terminal in the OBD interface; b13 — negative receiving terminal in OBD interface; b16 — power supply terminal in OBD interface; 20-a signal transceiver processor; g is the grounding end of the signal receiving and transmitting processor; tx-the negative transmit terminal of the signal transceiver processor; tx + -the transmit positive terminal of the signal transceiver processor; rx-the receiving negative terminal of the signal transceiving processor, Rx + -, the receiving positive terminal of the signal transceiving processor; p-power end of the signal transceiver processor; l1 — a first output of the signal transceiver processor; l2 — a second output of the signal transceiver processor; l3 — a third output of the signal transceiver processor; l4 — fourth output of the signal transceiver processor; 30-an indicator light module; 31 — a first indicator light; 32-a second indicator light; 33-a third indicator light; 34-a fourth indicator light; s1-negative terminal of third indicator light; s2, a positive terminal of a third indicator light; s3-the negative pole end of the fourth indicator light; s4, a positive terminal of a fourth indicator light; s5-the negative terminal of the first indicator light; s6, the positive terminal of the first indicator light; s7-the negative pole end of the second indicator light; s8, the positive terminal of a second indicator light; k1 — first switch piece; k2 — second switch piece; k3 — third switch element; k4 — fourth switch piece; 40-a key switch; 50-relay.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
The utility model provides a car ethernet interface diagnostic device, figure 1 is the utility model relates to an embodiment car ethernet interface diagnostic device's structure chart one.
As shown in fig. 1, in one embodiment, the automotive ethernet interface diagnostic device includes an OBD interface 10, a signal transceiver processor 20, and an indicator light module 30. The indicator light module 30 includes a first indicator light 31, a second indicator light 32, and a third indicator light 33.
As shown in fig. 1, the power supply terminal B16 of the OBD interface 10 is connected to the positive terminal S6 of the first indicator lamp 31, the positive terminal S8 of the second indicator lamp 32, and the power supply terminal P of the signal transceiver processor 20, respectively. The ground terminal B4 of the OBD interface 10 is connected to the negative terminal S5 of the first indicator light 31 and the ground terminal G of the signal transceiver processor 20, respectively. The activation terminal B8 of the OBD interface 10 is connected to the negative terminal S7 of the second indicator light 32.
When the power supply detection is performed, it is possible to directly determine whether or not the power supply line is faulty from the lighting state of the first indicator lamp 31. Specifically, when the power line is normal, the power source terminal B16 in the OBD interface 10 supplies power to the positive terminal S6 of the first indicator light 31, and then the negative terminal S5 of the first indicator light 31 flows back to the ground terminal B4 in the OBD interface 10 to form a loop, so that when the power line is normal, the first indicator light 31 will be powered on and emit light, otherwise, it indicates that the signal of the loop is faulty, and it is necessary to check the connection of the power source terminal B16 in the OBD interface 10 and the connection of the ground terminal B4 in the OBD interface 10. Whether power supply signal is normal or not can be visually judged through the first indicating lamp 31, and intelligent detection is realized.
When the activation signal detection is performed, whether the activation signal line is faulty or not can be directly judged from the lighting state of the second indicator lamp 32. Specifically, since the power supply terminal B16 in the OBD interface 10 supplies power to the positive electrode S8 of the second indicator light 32 when the activation signal line is normal, and then flows back to the activation terminal B8 in the OBD interface 10 through the negative electrode S7 of the second indicator light 32 to form a loop, when the activation signal line is normal, the second indicator light 32 will be powered on and emit light, otherwise, it indicates that the loop has a fault, and it is necessary to check the connection of the power supply terminal B16 in the OBD interface 10 and the connection of the activation terminal B8 in the OBD interface 10. Whether the activation signal is normal or not can be visually judged through the second indicator lamp 32, and intelligent detection is realized.
In one embodiment, the transmission and reception of the ethernet network in the OBD interface 10 are both differential signals. As shown in fig. 1, the positive transmitting terminal B3 of the OBD interface 10 is correspondingly connected to the positive receiving terminal Rx + of the signal transceiver processor 20, the negative transmitting terminal B11 of the OBD interface 10 is correspondingly connected to the negative receiving terminal Rx + of the signal transceiver processor 20, the positive receiving terminal B12 of the OBD interface 10 is correspondingly connected to the positive transmitting terminal Tx + of the signal transceiver processor 20, and the negative receiving terminal B13 of the OBD interface 10 is correspondingly connected to the negative transmitting terminal Tx-of the signal transceiver processor 20.
Referring to fig. 1, in an embodiment, the third output terminal L3 of the signal transceiver 20 is connected to the positive terminal S2 of the third indicator light 33, and the fourth output terminal L4 of the signal transceiver 20 is connected to the negative terminal S1 of the third indicator light 33. The signal transceiver processor 20 is connected to the third indicator lamp 33, and outputs a first signal to turn on the third indicator lamp 33 when the ethernet data connection is successful.
When detecting the ethernet signal, the signal transceiver processor 20 is electrically connected to the OBD interface 10, then performs detection and gateway connection processing, and then drives the third indicator light 33 according to the processing result in the form of an electrical signal, so that whether the ethernet communication line is faulty or not can be directly determined according to the lighting state of the third indicator light 33. Specifically, when the ethernet transceiving line is electrically connected normally, the third output terminal L3 of the signal transceiving processor 20 outputs the first signal, and supplies power to the positive terminal S2 of the third indicator light 33, and the first signal flows back to the fourth output terminal L4 of the signal transceiving processor 20 through the negative terminal S1 of the third indicator light 33 to form a loop. In an embodiment, when the electrical connection of the ethernet transceiving line is normal, the first signal is a dc signal to drive the third indicator light 33 to be normally on, otherwise, it is required to check the connection of the positive transmitting terminal B3 in the OBD interface 10, the positive transmitting terminal B11 in the OBD interface 10, the positive receiving terminal B12 in the OBD interface 10, and the negative receiving terminal B13 in the OBD interface 10, which indicates that the electrical connection of the ethernet transceiving line is faulty. When the data of the ethernet communication signal is received and transmitted normally, the first signal is an alternating current signal to drive the third indicator light 33 to flash, otherwise, the gateway connection failure is described, and the ethernet gateway routing setting needs to be checked.
Fig. 2 is a second structural diagram of the ethernet interface diagnosis apparatus according to an embodiment of the present invention.
As shown in fig. 2, in an embodiment, a fourth indicator light 34 is further included in the indicator light module 30 of the automotive ethernet interface diagnostic apparatus. The first output terminal L1 of the signal transceiving processor 20 is connected to the positive terminal S4 of the fourth indicator lamp 34, and the second output terminal L2 of the signal transceiving processor 20 is connected to the negative terminal S3 of the fourth indicator lamp 34. The signal transceiver processor 20 is connected to the fourth indicator lamp 34, and outputs a second signal to turn on the fourth indicator lamp 34 when the ethernet transceiver circuit is successfully electrically connected.
When detecting the ethernet signal, the signal transceiver processor 20 is connected to the OBD interface 10, and then performs detection and gateway connection processing, and then drives the third indicator light 33 and the fourth indicator light 34 with the processing result in the form of an electrical signal, so that the inspector directly determines whether the electrical connection of the ethernet transceiver line is faulty or not through the lighting state of the third indicator light 33, and determines whether the gateway connection of the ethernet communication line is faulty or not through the lighting state of the fourth indicator light 34. Specifically, when the ethernet transceiving line is electrically connected normally, the first output terminal L1 of the signal transceiving processor 20 outputs a second signal, and supplies power to the positive terminal S4 of the fourth indicator light 34, and the second signal flows back to the second output terminal L2 of the signal transceiving processor 20 through the negative terminal S3 of the fourth indicator light 34 to form a loop. In an embodiment, when the electrical connection of the ethernet transceiving line is normal, the third indicator light 33 is turned on, otherwise, it indicates that the electrical connection of the ethernet transceiving line is faulty, and it is necessary to check the connection of the positive transmitting terminal B3 in the OBD interface 10, the positive transmitting terminal B11 in the OBD interface 10, the positive receiving terminal B12 in the OBD interface 10, and the negative receiving terminal B13 in the OBD interface 10. When the ethernet communication signal data is received and transmitted normally, the fourth indicator light 34 is turned on, otherwise, the gateway connection failure is described, and the ethernet gateway routing setting needs to be checked.
Through the respective arrangement of the third indicator light 33 and the fourth indicator light 34, it is more intuitive for the detection personnel to distinguish the electrical connection fault and the data connection fault in the ethernet transceiving fault.
In one embodiment, the second signal is a dc signal, and when the electrical connection of the ethernet transceiving line is successful, the signal transceiving processor 20 outputs the dc signal to turn on the fourth indicator light 34. In other embodiments, the second signal is an ac signal, and the signal transceiver processor 20 outputs the ac signal to make the fourth indicator light 34 flash when the ethernet transceiver circuit is successfully connected. The present embodiment does not limit the frequency, waveform and duty ratio of the ac signal.
In one embodiment, the first signal is an ac signal, and the signal transceiver processor 20 outputs the ac signal to flash the third indicator light 33 when the ethernet data connection is successful. The present embodiment does not limit the frequency, waveform and duty ratio of the ac signal. In another embodiment, the first signal is a dc signal, and the signal transceiver processor 20 outputs the dc signal to normally turn on the third indicator light 33 when the ethernet data connection is successful.
The electrical connection fault and the data connection fault in the Ethernet transceiving fault are set by distinguishing the constant brightness and the flicker, so that a detector can judge the fault more intuitively.
Fig. 3 is a third structural diagram of the ethernet interface diagnosis apparatus according to an embodiment of the present invention.
As shown in fig. 3, in an embodiment, the ethernet interface diagnosis apparatus for a vehicle further includes a first switch device K1, and the power source terminal B16 of the OBD interface 10 is connected to the positive electrode of the first indicator lamp 31, the positive electrode of the second indicator lamp 32 and the power source terminal P of the signal transceiver 20 through the first switch device K1.
When the power supply diagnosis is needed, the first switch element K1 is turned on, and the power supply connection condition can be judged according to the state of the first indicator lamp 31. When the power diagnosis is not required, the power detection line is turned off by turning off the first switching piece K1.
As shown in fig. 3, in an embodiment, the ethernet interface diagnostic apparatus for an automobile further includes a second switch K2, and the activation terminal B8 of the OBD interface 10 is connected to the negative electrode of the second indicator light 32 through the second switch K2.
When the activation signal detection is performed, the second switching element K2 is turned on, and it is possible to directly determine whether the activation signal line is faulty or not by the lighting state of the second indicator lamp 32. When the detection is completed, the activation signal detection line is closed by closing the second switching element K2.
As shown in fig. 3, in an embodiment, the automobile ethernet interface diagnosis apparatus further includes a third switch K3 and a fourth switch K4, the transmitting terminal of the OBD interface 10 is correspondingly connected to the receiving terminal of the signal transceiver processor 20 through the third switch K3, and the receiving terminal of the OBD interface 10 is correspondingly connected to the transmitting terminal of the signal transceiver processor 20 through the fourth switch K4.
When the ethernet connection diagnosis is performed, the third switch element K3 and the fourth switch element K4 are turned on, and the electrical connection state and the gateway connection state of the ethernet transceiving line can be determined by the third indicator light 33 and/or the fourth indicator light 34. When the diagnosis is finished, the third switch element K3 and the fourth switch element K4 are closed, and the Ethernet connection diagnosis line can be closed.
In one embodiment, the ethernet reception and transmission in the OBD interface 10 are both differential signals, and with continued reference to fig. 3, the third switching element K3 and the fourth switching element K4 are both double pole double throw switches. In another embodiment, the third switching element K3 and the fourth switching element K4 are collectively a four pole, four throw switch.
In one embodiment, the automobile ethernet interface diagnosis device further comprises a control module, and the control module is connected with the control end of the switch element to control the on-off of the switch element. The control module can realize that a key opens all detection lines, also can satisfy the needs of automatic start detection and remote diagnosis through the networking.
In one embodiment, the control module is a key switch 40 and the switch element is a relay 50.
The action of the relay 50 is controlled by the key switch 40, so that the user can conveniently start the diagnostic device by one key. In other embodiments, the control module may also be other control devices such as a microprocessor and a software switch, and the switch device may also be various transistors, fets, and ic switches, so as to meet the requirements of automatic detection and remote diagnosis, without limitation.
In order to facilitate installation and use, in actual use, an integrated mode can be adopted, the relay and the signal receiving and transmitting processor are integrated in one installation box to serve as a centralized controller, and in addition, the key switch is installed on the indicating lamp panel to facilitate operation and use. The centralized controller, the vehicle-mounted automatic Diagnosis OBD (DOIP) interface and the indicating lamp panel are connected and communicated through a wire harness, and a complete detection system is formed. In the installation of a real vehicle, the centralized controller is required to be installed safely and reliably, is waterproof, sun-proof, vibration-proof and stepping-proof, is installed in the vehicle far away from parts in a motion state, can be installed on the inner side of a front wall plate at the front part of an instrument panel, and also can be installed on the left and right sides of the vehicle body of the instrument panel, under a beam of the instrument panel, a seat and the like. The installation of pilot lamp panel needs safe and reliable, and waterproof, sun-proof, antivibration, prevent stepping on, keeps away from motion state spare part and be convenient for operate and use, generally with on-vehicle automatic Diagnosis OBD (DOIP) interface installation of car together, also can integrate on combination meter and other display screens as required, but key switch need install again on other operating position of being convenient for. Of course, the diagnosis operation can also be performed by using the vehicle-mounted automatic Diagnosis OBD (DOIP) interface connection by using the vehicle Ethernet interface diagnosis device as an independent detector.
It should be noted that, when all the indicator lights are normal and the fault still exists, it indicates that the problem is in the diagnostic device or the diagnostic connecting line, and the diagnostic device or the diagnostic connecting line needs to be checked. When a plurality of signal indicator lamps are abnormal at the same time, the fault can be found quickly and accurately by carrying out one-to-one investigation according to the communication structure and principle of vehicle-mounted automatic Diagnosis OBD (DOIP) and the sequence. Wherein the pilot lamp can be for various common luminescent device like LED lamp pearl, bulb and glow lamp etc. the utility model discloses do not do the restriction.
The utility model provides a car ethernet interface diagnostic device can see the trouble problem directly perceivedly, need not to spend too much time or action and seeks to reach and reduce troubleshooting work load, shorten the troubleshooting time, improve work efficiency's purpose, it is very convenient, swift to use on-vehicle.
In this document, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms can be understood in a specific case to those of ordinary skill in the art.
As used herein, the ordinal adjectives "first", "second", etc., used to describe an element are merely to distinguish between similar elements and do not imply that the elements so described must be in a given sequence, either temporally, spatially, in ranking, or in any other manner.
As used herein, the meaning of "a plurality" or "a plurality" is two or more unless otherwise specified.
It will be understood by those skilled in the art that all or part of the steps of implementing the above method embodiments may be implemented by hardware associated with program instructions, and the program may be stored in a computer readable storage medium, and when executed, performs the steps including the above method embodiments. The foregoing storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
As used herein, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, including not only those elements listed, but also other elements not expressly listed.
The above description is only the specific embodiments of the present invention, but the scope of the present invention is not limited thereto. Those skilled in the art can easily conceive of changes or substitutions within the technical scope of the present disclosure, and all such changes or substitutions are intended to be included within the scope of the present disclosure. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The automobile Ethernet interface diagnosis device is characterized by comprising an OBD interface, a first indicator light, a second indicator light, a third indicator light and a signal transceiving processor;
the power supply end in the OBD interface is connected with the anode of the first indicator light, the anode of the second indicator light and the power supply end of the signal transceiving processor; a grounding end in the OBD interface is connected with a negative electrode of the first indicator light and a grounding end of the signal receiving and transmitting processor; an activation end in the OBD interface is connected with a negative electrode of the second indicator light; a transmitting end and a receiving end in the OBD interface are respectively and correspondingly connected with a receiving end and a transmitting end of the signal receiving and transmitting processor;
the signal receiving and transmitting processor is connected with the third indicator light, and outputs a first signal to enable the third indicator light to be turned on when the Ethernet data connection is successful.
2. The automobile ethernet interface diagnosis device according to claim 1, wherein said automobile ethernet interface diagnosis device further comprises a fourth indicator light, said signal transceiver processor is connected to said fourth indicator light, and outputs a second signal to turn on said fourth indicator light when the ethernet transceiver circuit is electrically connected successfully.
3. The automotive ethernet interface diagnostic device of claim 2, wherein the second signal is a dc signal.
4. The automotive ethernet interface diagnostic device of claim 1, wherein the first signal is an alternating current signal.
5. The automotive ethernet interface diagnostic apparatus according to claim 1, further comprising a first switch device, wherein the power terminals of the OBD interface are respectively connected to the positive terminal of the first indicator light, the positive terminal of the second indicator light, and the power terminals of the signal transceiver processor through the first switch device.
6. The automotive ethernet interface diagnostic device of claim 1, further comprising a second switch, wherein the active terminal of the OBD interface is connected to the negative terminal of the second indicator light via the second switch.
7. The automobile ethernet interface diagnosis device according to claim 1, further comprising a third switch and a fourth switch, wherein the transmitting end of the OBD interface is correspondingly connected to the receiving end of the signal transceiver processor through the third switch, and the receiving end of the OBD interface is correspondingly connected to the transmitting end of the signal transceiver processor through the fourth switch.
8. The automotive ethernet interface diagnostic apparatus according to claim 7, wherein the transmitting terminal and the receiving terminal of the OBD interface are both differential signal terminals, and the third switch element and the fourth switch element are both double-pole double-throw switches.
9. The automobile ethernet interface diagnosis device according to any of the claims 5 to 8, further comprising a control module, wherein said control module is connected to the control terminal of the switch member to control the on/off of said switch member.
10. The automotive ethernet interface diagnostic device of claim 9, wherein said control module is a push button switch and said switch member is a relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020516411.7U CN211956215U (en) | 2020-04-09 | 2020-04-09 | Automobile Ethernet interface diagnosis device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020516411.7U CN211956215U (en) | 2020-04-09 | 2020-04-09 | Automobile Ethernet interface diagnosis device |
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| CN211956215U true CN211956215U (en) | 2020-11-17 |
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| CN202020516411.7U Active CN211956215U (en) | 2020-04-09 | 2020-04-09 | Automobile Ethernet interface diagnosis device |
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