Intelligent diagnosis device and diagnosis method for bus lamp and guideboard

Abstract

The invention relates to the technical field of vehicle intelligent network connection diagnosis, and discloses a bus lamp and guideboard intelligent diagnosis device which comprises a detection door system, the detection door system comprises a CAN-WIFI module and a detection station, the CAN-WIFI module is arranged on a vehicle, the vehicle is provided with a lamplight and guideboard controller, a lamplight type light source and a guideboard type light source, and the lamplight and guideboard controller is connected with the detection station. The lamplight and guideboard controller is connected with the lamplight light source and the guideboard light source through pins on the lamplight and guideboard controller, and the CAN-WIFI module is connected with the lamplight and guideboard controller through CAN communication and connected with the detection station through WIFI communication. According to the invention, the design of the vehicle is simplified, the size and space of the lamplight and guideboard controller are reduced, only an independent CAN-WIFI module needs to be added on the whole vehicle, the size of the module can be made to be very small, and a fault detection circuit does not need to be designed for each lamp.

Description

Technical Field

[0001] This invention relates to the field of intelligent connected vehicle diagnostic technology, specifically to an intelligent diagnostic device and method for bus lights and road signs. Background Technology

[0002] Currently, more and more bus companies are choosing pure electric buses as their operating solution. Buses have a wide variety of lighting fixtures, such as... Figure 4 As shown, there are various types of lights, such as parking lights 62, side lights 61, low beam headlights 65, high beam headlights 66, daytime running lights 63, vanity lights 6C, step lights 6A, fog lights 6B, automatic headlights 64, low beam headlights 65, and high beam headlights 66. Moreover, a single vehicle may have more than a dozen parking lights 62, side lights 61, and vanity lights 6C, far exceeding the variety and number of lights found in most private cars. In some mid-to-high-end private cars, when a light malfunctions and fails to illuminate, the instrument panel will issue a warning to replace it. This is because private cars have a lighting fault detection circuit in their lighting control circuit, which includes numerous electronic components such as light sensors, chip processors, rectifiers, and diodes, making it quite expensive. For example, if a light is on and the fault detection circuit detects that its operating current, voltage, or light intensity is lower than normal, it indicates that the light has malfunctioned and cannot be illuminated. This control circuit will report the lighting fault to the instrument panel to remind the driver to replace the corresponding light.

[0003] However, due to cost control considerations, designing individual control circuits for each of the numerous lights on a bus would significantly increase manufacturing and procurement costs, reducing the bus's market competitiveness. Furthermore, buses are managed by a company, not privately owned, and drivers don't drive the same bus every day. Even if these lights had fault detection and alert systems, timely replacement would require a high level of responsibility from all on-duty drivers and maintenance personnel. If damaged lights are not replaced promptly and are put into operation, it would pose a significant driving risk and impact urban traffic safety.

[0004] For the reasons mentioned above, the lights on buses are currently not designed with fault detection circuits and cannot display faults on the instrument panel. Therefore, the damage to the lights is mainly checked manually by the driver or bus maintenance personnel according to the existing traditional management model during the bus maintenance process. This is time-consuming and inefficient for each bus, and can only be manually archived, making it impossible to achieve intelligent and networked operation management.

[0005] With the increasing demand for refined management of public transportation operations, manual management is no longer sufficient. The phenomenon of buses operating with faulty lights is commonplace, causing public concern. Therefore, public transportation urgently needs intelligent and networked management methods and solutions. This includes not only intelligent and networked diagnostics of bus lights but also their unique front, middle, and rear route signs. This would ensure that all lights on buses are functioning properly and that all route signs accurately and clearly display route information, facilitating passenger travel, enhancing their experience, and promoting the further development of the bus industry. Summary of the Invention

[0006] The technical problem this invention aims to solve is that existing bus lights are numerous, and relying on manual inspection is inefficient and time-consuming.

[0007] To address the aforementioned technical problems, the present invention provides an intelligent diagnostic device for bus lights and road signs, comprising a detection gate system. The detection gate system includes a CAN-WIFI module and a detection station. The CAN-WIFI module is installed on the vehicle, which is equipped with a light and road sign controller, light sources, and road sign sources. The light and road sign controller is connected to the light sources and road sign sources via pins. The CAN-WIFI module is connected to the light and road sign controller via CAN communication and to the detection station via WIFI communication.

[0008] Optionally, the CAN-WIFI module includes a power management module, an I / O port, a CAN module, a data storage module, a WIFI network processor, and an RF switch and antenna. The light and road sign controller is connected to the CAN module, the WIFI network processor is connected to the detection station, the CAN module and the WIFI network processor are connected via USB communication, the RF switch and antenna are connected to the WIFI network processor, the power module is used to power the CAN-WIFI module, and the data storage module is used to store data.

[0009] Optionally, it may also include a vehicle instrument cluster, which is installed on the vehicle and communicates with the CAN module.

[0010] Optionally, the detection station includes a WIFI module, an image recognition detection device, a signal processor, and a terminal computer. The WIFI module is communicatively connected to the WIFI network processor, the image recognition detection device is connected to the signal processor, and the signal processor is connected to the terminal computer.

[0011] The diagnostic method for intelligent diagnostic devices for bus lights and road signs includes the following steps:

[0012] S1. The driver drives the vehicle to be inspected to the designated location of the inspection station, which is within the coverage area of ​​the WIFI module. At the same time, the image recognition equipment can clearly identify the light sources such as lights and road signs on the vehicle.

[0013] S2. After the driver drives the vehicle to the designated location and stops, the driver shifts the gear to N and engages the handbrake. No further operation is required from the driver.

[0014] S3, the CAN-WIFI module connects to the WIFI module of the inspection station and sends the vehicle VIN code read from the whole vehicle to the inspection station for reading and storage;

[0015] S4. The testing station requests the start of this test. After receiving the instruction, the CAN-WIFI module enables the vehicle's lighting and road sign controllers to output power, turns on all the vehicle's lighting and road sign light sources in sequence, and feeds back the working status of the lighting and road sign light sources to the testing station in real time through the vehicle's instrument panel via the CAN-WIFI module. During the process, the vehicle's instrument panel displays the status of "Test Started" and "Testing in Progress" in real time.

[0016] S5. During normal operation of lighting and road sign light sources, the image recognition equipment at the testing station begins to detect them and transmits the detected images to the signal processor. The signal processor performs diagnostic processing and uploads the diagnostic results to the computer terminal. The computer terminal is equipped with vehicle self-diagnostic system software, which displays the diagnostic results on the page and reminds users of the lighting and road sign light sources that need to be repaired or replaced.

[0017] S6. After the inspection station completes the inspection, it will forward the end request to the whole vehicle through the CAN-WIFI module. After receiving the end request, the lighting and road sign controller will turn off all lighting and road sign light sources, and at the same time display "Inspection completed" on the vehicle instrument page.

[0018] S7. The vehicle's instrument panel sends the "Inspection Completed" status to the inspection station via the CAN-WIFI module. The inspection station then ends the current inspection service and waits for the next inspection.

[0019] Optionally, if the vehicle does not meet the detection conditions after reading the VIN code in step S3, the CAN-WIFI module will not respond to the request when the detection station requests the start of this detection in step S4, the detection of light sources and road sign sources will not start, and the content of the non-compliant conditions will be displayed on the vehicle instrument panel.

[0020] In summary, the present invention has at least one of the following beneficial effects:

[0021] 1. This invention simplifies vehicle design and reduces the size and space required for light and road sign controllers: Buses have a greater variety and number of lights than passenger cars, totaling as many as twenty or thirty. If each light were designed with a hardware fault detection circuit, twenty or thirty independent hardware fault detection circuits would need to be added to the light and road sign controller 2, requiring the controller to be designed to be very large, which is very unfavorable for the layout of the controller on the vehicle. This invention only requires adding an independent CAN-WIFI module to the vehicle, and the size of this module can be made very small, eliminating the need to design fault detection circuits for each light.

[0022] 2. The fault detection for lighting fixtures in this invention is more targeted. On buses, features such as marker lights, side lights, and interior lights are typically centrally controlled, meaning a single pin on the lighting and road sign controller simultaneously controls a dozen or more side lights or marker lights. This means the side lights or marker lights turn on and off simultaneously. The control circuit is as follows: Figure 3 Therefore, even with a hardware fault detection circuit, it is impossible to distinguish which side light or marker light is faulty. The "detection gate system" of this invention can diagnose the fault of each light according to the different installation positions of each light, thus making the fault detection more targeted.

[0023] 3. This invention can change the operation and management of urban transportation, improve the level of refined management, and realize "digital transformation". The "detection gate system" transforms the current human-based bus maintenance into automatic diagnosis, eliminating the need for human intervention. It can also upload all maintenance data to the server, realizing intelligent and networked "digital transformation" and meeting the urgent needs of bus companies to transform their management methods.

[0024] 4. This invention can improve the maintenance and production efficiency of bus companies and reduce their labor and management costs. The "inspection gate system" only takes a short time from when a vehicle enters the inspection station to when the inspection is completed, which greatly improves production efficiency and reduces labor costs. Attached Figure Description

[0025] Figure 1 This is a structural block diagram of the CAN-WIFI module of the intelligent diagnostic device for bus lights and road signs of the present invention;

[0026] Figure 2 This is a signal conversion diagram of the intelligent diagnostic device for bus lights and road signs according to the present invention;

[0027] Figure 3 This is a circuit block diagram showing the connection between the light and road sign controller of the present invention and the light source.

[0028] Figure 4 This is a flowchart of the diagnostic method for the intelligent diagnostic device for bus lights and road signs of the present invention;

[0029] Figure 5 This is a flowchart of an embodiment of the present invention;

[0030] In the diagram: 1. CAN-WIFI module; 2. Lighting and road sign controller; 3. Inspection station; 4. Vehicle instrument panel; 6. Lighting light source; 7. Road sign light source; 11. I / O port; 12. CAN module; 13. Data storage module; 14. Power management module; 15. WIFI network processor; 16. RF switch and antenna; 20. Inspection gate system; 21. Pin; 31. WIFI module; 32. Image recognition and inspection equipment; 33. Signal processor; 34. Terminal computer; 41. Front body controller module; 42. Rear body controller module; 61. Side lights; 62. Parking lights; 63. Daytime running lights; 64. Automatic headlights; 65. Low beam headlights; 66. High beam headlights; 67. Turn signals; 68. Brake lights; 69. Daytime running lights; 6A. Step lights; 6B. Fog lights; 6C. Cabin lights. Detailed Implementation

[0031] The following combination Figure 1-5 The present invention will be described in further detail below.

[0032] This invention discloses an intelligent diagnostic device for bus lights and road signs, with reference to... Figure 2 and Figure 3 The system includes a detection gate system 20, which includes a CAN-WIFI module 1 and a detection station 3. The CAN-WIFI module 1 is installed on the vehicle, which is equipped with a light and road sign controller 2, a light source 6, and a road sign source 7. The light and road sign controller 2 is connected to the light source 6 and the road sign source 7 through pins 21. The CAN-WIFI module 1 is connected to the light and road sign controller 2 through CAN communication and to the detection station 3 through WIFI communication.

[0033] Specifically, the CAN-WIFI module 1 interacts with the vehicle's lighting and road sign controller 2 via CAN, enabling the street light and road sign controller 2 to output power, thereby controlling the operation of the lighting source 6 and the road sign source 7. In addition to communicating with the vehicle via the CAN network, the CAN-WIFI module 1 can also convert CAN network data information into WIFI network data information, and vice versa.

[0034] In a further implementation, refer to Figure 1The CAN-WIFI module 1 includes a power management module 14, an I / O port 11, a CAN module 12, a data storage module 13, a WIFI network processor 15, and an RF switch and antenna 16. The light and road sign controller 2 is connected to the CAN module 12, the WIFI network processor 15 is connected to the detection station 3, the CAN module 12 and the WIFI network processor 15 are connected via USB communication, the RF switch and antenna 16 are connected to the WIFI network processor 15, the power module 14 is used to power the CAN-WIFI module 1, and the data storage module 13 is used to store data. It also includes a vehicle instrument panel 4, which is installed on the vehicle and communicates with the CAN module 12.

[0035] In a further implementation, refer to Figure 5 The testing station 3 includes a WIFI module 31, an image recognition detection device 32, a signal processor 33, and a terminal computer 34. The WIFI module 31 is connected to the WIFI network processor 15. The image recognition detection device 32 is connected to the signal processor 33. The image recognition detection device 32 is used to identify the brightness of various lights turned on by the vehicle, whether there are obstructions, whether the lamp covers are damaged or cracked, whether the wiring display of road signs is accurate, whether the strokes of LED fonts are complete, and whether the surface is clear and has stripes, etc. The signal processor 33 is connected to the terminal computer 34. The signal processor 33 is used to analyze the detection results of the image recognition detection device 32, save the data, generate a diagnostic report, and display and remind the vehicle's lights and road signs to replace faulty parts on a dedicated page of the terminal vehicle self-diagnosis system.

[0036] This invention also discloses a diagnostic method for an intelligent diagnostic device for bus lights and road signs, referring to... Figure 4 This includes the following steps:

[0037] S1. The driver drives the vehicle to be inspected to the designated location of the inspection station 3, which is within the coverage area of ​​the WIFI module 31. At the same time, the image recognition device 32 can also clearly identify the light source 6 and road sign light source 7 on the vehicle.

[0038] S2. After the driver drives the vehicle to the designated location and stops, the driver shifts the gear to N and engages the handbrake. No further operation is required from the driver.

[0039] S3, CAN-WIFI module 1 connects to WIFI module 31 of inspection station 3, and sends the vehicle VIN code read from the whole vehicle to inspection station 3 for reading and storage; VIN code is the vehicle frame number, which is a unique identifier of the vehicle and is used to distinguish the vehicle.

[0040] S4. Inspection station 3 requests the start of this inspection. After receiving the instruction, CAN-WIFI module 1 enables the vehicle's lighting and road sign controller 2 to output power, turns on all the vehicle's lighting sources 6 and road sign sources 7 in sequence, and feeds back the working status of the lighting sources 6 and road sign sources 7 to inspection station 3 in real time through the vehicle's instrument panel 4 via CAN-WIFI module 1. During the process, the vehicle's instrument panel 4 displays the status of "inspection started" and "in inspection" in real time.

[0041] If the vehicle does not meet the detection conditions after reading the VIN code in step S3, then when the detection station 3 requests the start of this detection, the CAN-WIFI module 1 does not respond to the request, the detection of light source 6 and road sign light source 7 does not start, and the content of the non-compliant conditions is displayed on the vehicle instrument panel.

[0042] During normal operation of S5, lighting source 6 and road sign source 7, the image recognition device 32 of the testing station 3 begins to detect them and transmits the detected images to the signal processor 33. The signal processor 33 performs diagnostic processing and uploads the diagnostic results to the computer terminal 34. The computer terminal 34 is equipped with vehicle self-diagnostic system software. The vehicle self-diagnostic system software stores the diagnostic results and displays and reminds users on a dedicated page about the lighting source 6 and road sign source 7 that need to be repaired or replaced.

[0043] S6. After the inspection station 3 finishes the inspection, it will forward the end request to the whole vehicle through the CAN-WIFI module 1. After receiving the end request, the lighting and road sign controller 2 will turn off all lighting sources 6 and road sign sources 7, and at the same time display "Inspection completed" on the whole vehicle instrument panel 4.

[0044] S7, the vehicle instrument panel 4 sends the "inspection completed" status to the inspection station 3 via the CAN-WIFI module 1, and the inspection station 3 ends the current inspection service and waits for the next inspection.

[0045] If the vehicle does not meet the detection conditions after reading the VIN code in step S3, then when the detection station 3 requests the start of this detection in step S4, the CAN-WIFI module 1 does not respond to the request, the detection of light source 6 and road sign light source 7 does not start, and the non-compliant conditions are displayed on the vehicle instrument panel, including whether the handbrake is engaged, whether the vehicle speed is 0, whether the gear is correct, etc.

[0046] Example

[0047] The present invention adds a CAN-WIFI module 1 to the vehicle. This module has CAN information transmission and reception functions, WIFI transmission and reception functions, and CAN to WIFI conversion functions. The bus company inspection station 3 is equipped with inspection equipment, including WIFI network 31, image inspection equipment 32, signal processor 33 and computer terminal 34.

[0048] In this embodiment, the CAN-WIFI module 1 and the vehicle instrument pack 4 (IPK) can exchange information via the CAN (Controller Area Network) network. The lighting source 6 and the road sign source 7 are powered by the front body controller module 41 (FBCM (Front Body Controller Module)) and the rear body controller module 42 (RBCM (Rear Body Controller Module)).

[0049] During the CAN information interaction between CAN-WIFI module 1 and vehicle instrument cluster 4, CAN-WIFI module 1 enables vehicle instrument cluster 4 via CAN. Vehicle instrument cluster 4, in turn, enables the front body controller module 41 and rear body controller module 42 to output power for lights and road signs via the CAN network, thus activating the light source 6 and road sign source 7. In addition to communicating with the vehicle via the CAN network, this module can also convert CAN network data into WIFI network data, and vice versa. The specific software control flow is as follows:

[0050] 1. The handshake process between the vehicle and the inspection station

[0051] 1.1 The WIFI module 31 of the detection station 3 announces its existence by sending periodic UDP broadcast messages (StationAnnouncement, SANN) protocol;

[0052] 1.2 When the vehicle enters the WIFI coverage area of ​​the inspection station 3, the CAN-WIFI module 1 receives the periodic message sent by the inspection station 3 and then sends a connection request message SAREP (Station Announcement Reply).

[0053] 1.3 After detecting the SAREP message requesting connection sent by CAN-WIFI module 1, detection station 3 sends a SACFM (Station Announcement Confirm) message indicating that the vehicle has entered the station and that connection is permitted.

[0054] 2. Vehicle response process

[0055] 2.1 After the WIFI connection is established in process 1.3 above, the testing station 3 sends a vehicle testing request through the WIFI module 31;

[0056] 2.2 After receiving the detection request, CAN-WIFI module 1 sends a confirmation message agreeing to the detection.

[0057] 2.3 After receiving the test acceptance response message from CAN-WIFI module 1, test station 3 sends a message to confirm that the document acceptance is complete;

[0058] 2.4 The CAN-WIFI module 1 reads the vehicle VIN code information on the CAN network and forwards the VIN code information to the inspection station 3 for reading and storage, which is used as a unique identifier to distinguish the inspected vehicle;

[0059] 3. Lighting detection request initiated

[0060] 3.1 The testing station sends the LCBREQ (Light Check Begin Request) to CAN-WIFI module 1;

[0061] 3.2 CAN-WIFI module 1 detects request and begins responding (Light Check Begin Reply, LCBREP);

[0062] (a) After receiving the detection request from the detection station, CAN-WIFI module 1 determines whether the current vehicle status meets the following conditions:

[0063] CurrentGear = 0 is N gear; &

[0064] Handbrake switch: Parking_Brake_Switch = 1 or Halt_Brake_Mode = 1;

[0065] Vehicle Speed ​​= 0

[0066] (b) After the above conditions are met, the CAN-WIFI module 1 will send the detection request start signal CheckReq=1 to the vehicle instrument panel 4;

[0067] (c) After the above conditions are met, the CAN-WIFI module 1 will send the detection status display CheckState=1(0x18FF01E8, b0.4-0.5) to the vehicle instrument panel 4;

[0068] (d) After receiving the detection request start signal CheckReq=1, the vehicle instrument panel 4 sends the detection feedback signal check_feedback=1 to the CAN-WIFI module 1.

[0069] (e) After the vehicle instrument panel 4 receives the detection status display CheckState=1, it will display "Connecting" or a corresponding symbol on its screen;

[0070] (f) After receiving check_feedback=1, CAN-WIFI module 1 sends LCBREP to detection station 3;

[0071] 3.3 After receiving LCBREP, detection station 3 responds to CAN-WIFI module 1 with "Request to start response feedback" LCBCMF (Light Check Begin Reply Confirm, LCBCMF);

[0072] 4. Intelligent light detection

[0073] 4.1 Light Detection Request (LDREQ)

[0074] (1) The detection station 3 sends a vehicle light detection request LDREQ message to the CAN-WIFI module 1;

[0075] (2) After receiving the light detection request LDREQ message, CAN-WIFI module 1 sends LightReq=1 to the vehicle instrument panel 4;

[0076] (3) After receiving the LDREQ message for light detection, the CAN-WIFI module 1 sends the detection status display CheckState=2 to the vehicle instrument panel 4;

[0077] (4) After receiving the light detection request LightReq=1, the vehicle instrument panel 4 sends the light detection request feedback light_check_feedback=1 to the CAN-WIFI module 1 and starts the light-on operation, turning on the lights on the vehicle in the agreed order.

[0078] (5) After the vehicle instrument panel 4 receives the detection status display CheckState=2(0x18FF01E8, b0.4-0.5), it will display "Detecting" or a corresponding symbol on its screen;

[0079] 4.2 Light Detection Request Reply (LDREP)

[0080] After receiving light_check_feedback=1, CAN-WIFI module 1 sends LDREP to the detection station;

[0081] 4.3 Light Detection Request Reply Confirmation (LDCMF)

[0082] After receiving LDREP, the testing station sends an LDCMF message to the CAN-WIFI module;

[0083] 5. Intelligent lighting detection complete.

[0084] 5.1 Notification of Light Detect Completed (LDCOMPL)

[0085] (1) After completing the light detection, the detection station 3 sends a light detection completion notification LDCOMPL to the CAN-WIFI module 1;

[0086] (2) After receiving LDCOMPL, CAN-WIFI module 1 sends a light detection no-request CheckReq=0 to the instrument (Note: According to the CAN protocol, 0 means no request).

[0087] (3) After receiving LDCOMPL, CAN-WIFI module 1 sends a detection status display CheckState=3 to vehicle instrument 4 (Note: According to the CAN protocol, 3 means "detection completed");

[0088] (4) After the instrument receives CheckReq=0&LightReq=0, it turns off the lights and sends light_check_feedback=0&check_feedback=0 to the CAN-WIFI module (Note: According to the CAN protocol, 0 means that no request has been received).

[0089] (5) After receiving CheckState=3, the vehicle instrument panel 4 will display "Detection complete" or a corresponding symbol on its screen;

[0090] 5.2 Response to Light Detect Completed Reply (LDCOMREP)

[0091] After receiving light_check_feedback=0 and check_feedback=0, CAN-WIFI module 1 sends LDCOMREP to the testing station, and the vehicle light test ends.

[0092] This invention only requires adding an on-board diagnostic device CAN-WIFI module 1 to the vehicle, and adding WIFI module 31, image recognition detection equipment 32, signal processing 33, and computer terminal 34 to the inspection station 3. After the vehicle arrives at the inspection station 3, without any operation by the staff, the "inspection gate system" quickly and automatically reports the normal / fault status of all the vehicle's lighting sources 6 and road sign sources 7 to the inspection station terminal 34 within 30 seconds. Thus, the bus company can collect the usage status of all lighting sources 6 and road sign sources 7 of all vehicles passing through the "inspection gate system" every day, and replace faulty parts very promptly, thereby realizing intelligent and networked management.

[0093] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An intelligent diagnostic device for bus lights and road signs, characterized in that, The system includes a detection gate system (20), which includes a CAN-WIFI module (1) and a detection station (3). The CAN-WIFI module (1) is installed on the vehicle, which is equipped with a light and road sign controller (2), a light source (6), and a road sign source (7). The light and road sign controller (2) is connected to the light source (6) and the road sign source (7) through its pin (21). The CAN-WIFI module (1) is connected to the light and road sign controller (2) through CAN communication and to the detection station (3) through WIFI communication.

2. The intelligent diagnostic device for bus lights and road signs according to claim 1, characterized in that, The CAN-WIFI module (1) includes a power management module (14), an I / O port (11), a CAN module (12), a data storage module (13), a WIFI network processor (15), and an RF switch and antenna (16). The light and road sign controller (2) is connected to the CAN module (12), the WIFI network processor (15) is connected to the detection station (3), the CAN module (12) and the WIFI network processor (15) are connected via USB communication, the RF switch and antenna (16) are connected to the WIFI network processor (15), the power module (14) is used to power the CAN-WIFI module (1), and the data storage module (13) is used to store data.

3. The intelligent diagnostic device for bus lights and road signs according to claim 2, characterized in that, It also includes a vehicle instrument cluster (4), which is installed on the vehicle and is connected to the CAN module (12) for communication.

4. The intelligent diagnostic device for bus lights and road signs according to claim 3, characterized in that, The detection station (3) includes a WIFI module (31), an image recognition detection device (32), a signal processor (33), and a terminal computer (34). The WIFI module (31) is connected to the WIFI network processor (15), the image recognition detection device (32) is connected to the signal processor (33), and the signal processor (33) is connected to the terminal computer (34).

5. The diagnostic method of the intelligent diagnostic device for bus lights and road signs as described in claim 4, characterized in that, Includes the following steps: S1. The driver drives the vehicle to be tested to the designated location of the testing station (3), which is within the coverage area of ​​the WIFI module (31). At the same time, the image recognition device (32) can also clearly identify the light source (6) and road sign light source (7) on the vehicle. S2. After the driver drives the vehicle to the designated location and stops, the driver shifts the gear to N and engages the handbrake. No further operation is required from the driver. S3, the CAN-WIFI module (1) connects to the WIFI module (31) of the inspection station (3) and sends the vehicle VIN code read from the whole vehicle to the inspection station (3) for reading and storage; S4. The testing station (3) requests the start of this test. After receiving the instruction, the CAN-WIFI module (1) enables the vehicle's lighting and road sign controller (2) to output power, turns on all the vehicle's lighting sources (6) and road sign sources (7) in sequence, and feeds back the working status of the lighting sources (6) and road sign sources (7) to the testing station (3) in real time through the CAN-WIFI module (1) via the vehicle's instrument panel (4). During the process, the vehicle's instrument panel (4) displays the status of "test start" and "test in progress" in real time. During normal operation of S5, lighting light sources (6) and road sign light sources (7), the image recognition device (32) of the testing station (3) begins to detect them and transmits the detected images to the signal processor (33). The signal processor (33) performs diagnostic processing and uploads the diagnostic processing results to the computer terminal (34). The computer terminal (34) is equipped with vehicle self-diagnosis system software. The vehicle self-diagnosis system software displays the diagnostic results on the page and reminds the lighting light sources (6) and road sign light sources (7) that need to be repaired and replaced. S6. After the test station (3) finishes the test, it will forward the end request to the whole vehicle through the CAN-WIFI module (1). After the light and road sign controller (2) receives the end request, it will turn off all light sources (6) and road sign sources (7) and display "Test completed" on the whole vehicle instrument (4) page. S7. The vehicle instrument panel (4) sends the "test completed" status to the testing station (3) via the CAN-WIFI module (1). The testing station (3) then ends the current testing service and waits for the next test.

6. The diagnostic method of the intelligent diagnostic device for bus lights and road signs according to claim 5, characterized in that, If the vehicle does not meet the detection conditions after reading the VIN code in step S3, then when the detection station (3) requests the start of this detection in step S4, the CAN-WIFI module (1) does not respond to the request, the detection of light source (6) and road sign light source (7) does not start, and the content of the non-compliant conditions is displayed on the vehicle instrument panel.

Images