A method and apparatus for failure detection of an electronic outside mirror system

Abstract

The application discloses a fault detection method and device of an electronic outside rearview mirror system, which sequentially detects faults according to detection priorities of fault events in each fault type of the electronic outside rearview mirror system, wherein the detection priorities are set from large to small according to influence ranges of the fault events; and determines whether to report faults to a background management system or to perform fault reminding on an instrument according to fault levels of the detected fault events, wherein the fault levels are set according to whether the fault events have influences on pictures of the electronic outside rearview mirror. The fault detection according to the fault event priorities can help maintenance personnel to quickly lock faults when the faults occur, improve the maintenance efficiency of the vehicle, and the selection of different reminding modes according to the fault time levels can reduce the interference of fault reminding on normal driving of drivers and improve driving safety.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fault detection, in particular to a fault detection method and device for an electronic outside rearview mirror system. BACKGROUND

[0002] With the development of intelligent vehicles, electronic outside rearview mirrors are becoming more and more popular. Electronic outside rearview mirrors will gradually replace traditional mechanical rearview mirrors and will be installed on more and more vehicles. Compared with traditional mechanical outside rearview mirrors, electronic outside rearview mirrors introduce modules such as cameras, display screens, and controllers. The structure and operation mode of electronic outside rearview mirrors are more complex than those of traditional mechanical rearview mirrors. Therefore, the failure frequency of electronic outside rearview mirrors is higher, and the failure modes are more complex. Complex failure modes often affect the judgment of maintenance personnel, making it difficult for maintenance personnel to quickly and accurately locate faults when electronic outside rearview mirrors fail.

[0003] Therefore, how to detect faults of an electronic outside rearview mirror system to achieve quick and accurate fault location is a technical problem to be solved. SUMMARY

[0004] The main purpose of the present application is to provide a fault detection method and device for an electronic outside rearview mirror system, aiming to solve the technical problem that the failure mode of an electronic outside rearview mirror is complex, and it is difficult to quickly and accurately locate faults when the electronic outside rearview mirror fails.

[0005] In a first aspect, the present application provides a fault detection method for an electronic outside rearview mirror system, the method comprising the following steps:

[0006] The fault detection is performed according to the detection priority of the fault events in each fault type of the electronic outside rearview mirror system in turn, wherein the detection priority is set according to the influence range of the fault events from large to small.

[0007] The fault is reported to a background management system or a fault reminder is performed on an instrument according to the fault level of the detected fault event, wherein the fault level is set according to whether the fault event has an impact on the picture of the electronic outside rearview mirror.

[0008] In some embodiments, the fault types include communication faults, camera faults, and display screen faults. The fault detection is performed according to the detection priority of the fault events in each fault type of the electronic outside rearview mirror system in turn, including:

[0009] The fault detection is performed according to the detection priority of the fault events in the communication faults, the camera faults, and the display screen faults of the electronic outside rearview mirror system in turn.

[0010] In some embodiments, the fault detection is performed according to the detection priority of the fault events in each fault type of the electronic outside rearview mirror system in sequence, and further comprising:

[0011] After detecting the fault event, the fault detection is stopped.

[0012] In some embodiments, the fault detection is performed according to the detection priority of the fault events in the communication fault of the electronic outside rearview mirror system in sequence, comprising:

[0013] Detecting whether the CAN bus is faulty, if yes, stopping the detection, otherwise, detecting whether the bus node is faulty.

[0014] In some embodiments, the fault detection is performed according to the detection priority of the fault events in the camera fault of the electronic outside rearview mirror system in sequence, comprising:

[0015] Detecting whether the camera power supply is faulty, if yes, stopping the detection, otherwise, detecting whether the camera data encoding is faulty;

[0016] If the camera data encoding is faulty, stopping the detection, otherwise, detecting whether the camera state is faulty;

[0017] If the camera state is faulty, stopping the detection, otherwise, detecting the shooting frame rate of the camera;

[0018] If the shooting frame rate is less than the calibrated shooting frame rate and greater than or equal to a first preset frame rate, stopping the detection;

[0019] If the shooting frame rate is less than the first preset frame rate and greater than a second preset frame rate, stopping the detection;

[0020] If the shooting frame rate is less than or equal to the second preset frame rate, restarting the electronic outside rearview mirror system, and detecting the shooting frame rate again after the restart;

[0021] If the shooting frame rate is still less than or equal to the second preset frame rate after the restart, detecting whether there is a vehicle in the image shot by the camera frame by frame, and performing a danger warning on the instrument when detecting that there is a vehicle in the image;

[0022] Wherein, the first preset frame rate is greater than the second preset frame rate.

[0023] In some embodiments, the fault detection is performed according to the detection priority of the fault events in the display screen fault of the electronic outside rearview mirror system in sequence, comprising:

[0024] Detecting whether the display screen data decoding is faulty, if yes, stopping the detection, otherwise, detecting whether the display screen state is faulty;

[0025] If the display screen state has a fault, stop detecting, otherwise, detect the display frame rate of the display screen;

[0026] If the display frame rate is less than the calibrated display frame rate and greater than or equal to a third preset frame rate, stop detecting;

[0027] If the display frame rate is less than the third preset frame rate and greater than a fourth preset frame rate, stop detecting;

[0028] If the display frame rate is less than or equal to the fourth preset frame rate, restart the electronic outside rearview mirror system, and detect the display frame rate again after restarting;

[0029] If the display frame rate is still less than or equal to the fourth preset frame rate after restarting, detect frame by frame whether there is a vehicle in the image captured by the camera, and perform a danger warning on the instrument when a vehicle is detected in the image;

[0030] The third preset frame rate is greater than the fourth preset frame rate.

[0031] In some embodiments, the fault level is set according to whether the fault event has an impact on the picture of the electronic outside rearview mirror, including:

[0032] If the fault event has no impact on the picture of the electronic rearview mirror, set the fault level to a first level fault;

[0033] If the fault event has an impact on the picture of the electronic rearview mirror, set the fault level to a second level fault;

[0034] The CAN bus fault, bus node fault, capture frame rate less than the calibrated capture frame rate and greater than or equal to a first preset frame rate, and display frame rate less than the calibrated display frame rate and greater than or equal to a third preset frame rate are first level faults;

[0035] Camera power supply fault, camera data encoding fault, camera state fault, capture frame rate less than the first preset frame rate and greater than a second preset frame rate, capture frame rate less than or equal to the second preset frame rate, display screen data decoding fault, display frame rate less than the third preset frame rate and greater than a fourth preset frame rate, display screen state fault, and display frame rate less than or equal to the fourth preset frame rate are second level faults.

[0036] In some embodiments, whether to report the fault to the background management system or to perform a fault reminder on the instrument is determined according to the fault level of the detected fault event, including:

[0037] If the level of the fault event is a first level fault, report the fault to the background management system;

[0038] If the level of the fault event is a second level fault, perform a fault reminder on the instrument.

[0039] In some embodiments, before the detection priority of the fault events in the communication type fault, the camera type fault and the display screen type fault of the electronic outside rearview mirror system is sequentially performed, the method further comprises:

[0040] detecting the whole vehicle voltage;

[0041] If there is a voltage fault, a voltage fault reminder is performed on the instrument, and the fault detection is stopped.

[0042] In a second aspect, the application further provides a fault detection device of an electronic outside rearview mirror system, the device comprises:

[0043] a detection module, configured to sequentially perform fault detection according to the detection priority of the fault events in each fault type of the electronic outside rearview mirror system, wherein the detection priority is set from large to small according to the influence range of the fault events;

[0044] a processing module, configured to determine whether to report the fault to a background management system or perform a fault reminder on the instrument according to the fault level of the detected fault event, wherein the fault level is set according to whether the fault event has an impact on the picture of the electronic outside rearview mirror.

[0045] The application provides a fault detection method and device of an electronic outside rearview mirror system, which sequentially performs fault detection according to the detection priority of the fault events in each fault type of the electronic outside rearview mirror system, wherein the detection priority is set from large to small according to the influence range of the fault events; and determines whether to report the fault to a background management system or perform a fault reminder on the instrument according to the fault level of the detected fault event, wherein the fault level is set according to whether the fault event has an impact on the picture of the electronic outside rearview mirror. The fault detection according to the fault event priority can help the maintenance personnel to quickly lock the fault when the fault occurs, thereby improving the maintenance efficiency of the vehicle. The selection of different reminder modes according to the fault time level can reduce the interference of the fault reminder on the normal driving of the driver, thereby improving the driving safety. BRIEF DESCRIPTION OF DRAWINGS

[0046] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0047] Figure 1 A flowchart of a fault detection method of an electronic outside rearview mirror system according to an embodiment of the application is shown in the figure;

[0048] Figure 2 Fig. 1 is a schematic diagram of a communication fault detection process;

[0049] Figure 3 Fig. 2 is a schematic diagram of a camera fault detection process;

[0050] Figure 4 Fig. 3 is a schematic diagram of a display screen fault detection process;

[0051] Figure 5 Fig. 4 is a schematic diagram of an electronic outside rearview mirror system voltage fault detection process;

[0052] Figure 6 Fig. 5 is a schematic block diagram of a fault detection device of an electronic outside rearview mirror system provided by an embodiment of the present application.

[0053] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0054] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0055] The flowchart shown in the drawings is only an example and does not necessarily include all the contents and operations / steps, nor does it necessarily be executed in the described order. For example, some operations / steps can be further divided, combined or partially merged, so that the actual execution order can be changed according to the actual situation.

[0056] The embodiments of the present application provide a fault detection method and device of an electronic outside rearview mirror system. The fault detection method of the electronic outside rearview mirror system can be applied to a computer device, which can be a vehicle controller or a vehicle-mounted computer.

[0057] Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the case of no conflict, the embodiments described below and the features in the embodiments can be combined with each other.

[0058] Please refer to Figure 1 , Figure 1 Fig. 6 is a flowchart of a fault detection method of an electronic outside rearview mirror system provided by an embodiment of the present application.

[0059] As shown in Figure 1 , the overall idea of the method includes steps S1 to S2.

[0060] Step S1, sequentially detecting the faults according to the detection priorities of the fault events in each fault type of the electronic outside rearview mirror system, wherein the detection priorities are set from large to small according to the influence ranges of the fault events.

[0061] Step S2, determining whether to report the fault to the background management system or to give a fault reminder on the instrument according to the fault levels of the detected fault events, wherein the fault levels are set according to whether the fault events have an influence on the picture of the electronic outside rearview mirror.

[0062] It is worth mentioning that the fault types include communication faults, camera faults and display screen faults, and the method further comprises: sequentially detecting the faults according to the detection priorities of the fault events in the communication faults, the camera faults and the display screen faults of the electronic outside rearview mirror system.

[0063] Specifically, the communication faults include CAN bus faults and bus node faults; the camera faults include camera power supply faults, camera data encoding faults, camera state faults, a shooting frame rate less than a calibrated shooting frame rate and greater than or equal to a first preset frame rate, a shooting frame rate less than the first preset frame rate and greater than a second preset frame rate, and a shooting frame rate less than or equal to the second preset frame rate; and the display screen faults include display screen data decoding faults, display screen state faults, a display frame rate less than a calibrated display frame rate and greater than or equal to a third preset frame rate, a display frame rate less than the third preset frame rate and greater than a fourth preset frame rate, and a display frame rate less than or equal to the fourth preset frame rate.

[0064] It is worth mentioning that if the fault event has no influence on the picture of the electronic rearview mirror, the fault level is set as a first-level fault; if the fault event has an influence on the picture of the electronic rearview mirror, the fault level is set as a second-level fault; wherein the CAN bus faults, the bus node faults, the shooting frame rate less than the calibrated shooting frame rate and greater than or equal to the first preset frame rate, and the display frame rate less than the calibrated display frame rate and greater than or equal to the third preset frame rate are first-level faults; the camera power supply faults, the camera data encoding faults, the camera state faults, the shooting frame rate less than the first preset frame rate and greater than the second preset frame rate, the shooting frame rate less than or equal to the second preset frame rate, the display screen data decoding faults, the display frame rate less than the third preset frame rate and greater than the fourth preset frame rate, the display screen state faults, and the display frame rate less than or equal to the fourth preset frame rate are second-level faults.

[0065] Furthermore, based on the fault level of the detected fault event, the system determines whether to report the fault to the back-end management system or issue a fault alert on the instrument panel. Specifically, if the fault event is classified as a Level 1 fault, it is reported to the back-end management system; if the fault event is classified as a Level 2 fault, a fault alert is issued on the instrument panel. It's important to understand that Level 1 faults do not affect the image displayed on the electronic rearview mirror and therefore do not affect normal driving. In this case, the back-end management system can send a message to the 4S store or service provider to record the fault. The 4S store or service provider can then determine whether to contact the vehicle owner for repairs based on the reported fault. This reduces the interference of the fault with normal driving and allows development and after-sales personnel to quickly locate faults in the rearview mirror system, facilitating subsequent maintenance. Level 2 faults affect the image displayed on the electronic rearview mirror and may affect safe driving. Therefore, the instrument panel alerts the driver to promptly repair the fault to ensure driving safety.

[0066] Specifically, fault detection is performed sequentially according to the detection priority of fault events in the communication-related faults of the electronic exterior rearview mirror system. This includes: detecting whether there is a fault in the CAN bus; if so, detection stops; otherwise, detecting whether there is a fault in the bus nodes. Because a CAN bus fault will cause all bus nodes to malfunction, CAN bus faults have a higher priority.

[0067] Exemplary, such as Figure 2 As shown, when the electronic rearview mirror system starts operating, the first step in detecting communication faults is to check for CAN bus faults. If a CAN bus fault is detected, further fault diagnosis will not proceed, and the CAN bus fault will be reported to the backend management system. If no CAN bus fault is detected, the next step is to check for bus node faults. If a bus node fault is detected, the bus node fault will be reported to the backend management system. If the bus nodes are also fault-free, it can be confirmed that the electronic rearview mirror has no communication faults. Because bus faults do not affect the rearview mirror's image capture or display, this fault is classified as a Level 1 fault.

[0068] Specifically, fault detection is performed sequentially according to the detection priority of fault events in the camera-related faults of the electronic exterior rearview mirror system, including: detecting whether there is a fault in the camera power supply; if so, the detection stops; otherwise, detecting whether there is a fault in the camera data encoding; if there is a fault in the camera data encoding, the detection stops; otherwise, detecting whether there is a fault in the camera status; if there is a fault in the camera status, the detection stops; otherwise, the camera's shooting frame rate is detected; if the shooting frame rate is less than the calibrated shooting frame rate but greater than or equal to a first preset frame rate, the detection stops; if the shooting frame rate is less than the first preset frame rate but greater than a second preset frame rate, the detection stops; if the shooting frame rate is less than or equal to the second preset frame rate, the electronic exterior rearview mirror system is restarted, and the shooting frame rate is detected again after restarting; if the shooting frame rate is still less than or equal to the second preset frame rate after restarting, the presence of a vehicle in the image captured by the camera is detected frame by frame, and a hazard warning is displayed on the instrument panel when a vehicle is detected in the image; wherein, the first preset frame rate is greater than the second preset frame rate.

[0069] Exemplary, such as Figure 3 As shown, when the electronic rearview mirror system is operating normally, the camera fault detection program checks for power failures. If a power failure is detected, further fault checks are not performed because the camera cannot start taking pictures, resulting in an undisplayed rearview image, directly affecting the driver's driving. Therefore, a camera power failure is classified as a level two fault, and the system will display a fault warning on the instrument panel to promptly alert the driver and facilitate timely repair. When the camera does not have a power failure, the system checks the camera's data encoding. If a data encoding fault is found, further fault checks are not performed because a data encoding fault prevents the camera's captured image from being transmitted, resulting in an undisplayed rearview image, directly affecting the driver's driving. Therefore, this is also classified as a level two fault, and the system will display a fault warning on the instrument panel. When the camera does not have a data encoding fault, the system checks the camera's status, including whether the camera is obstructed or dirty. If a camera status fault is found, further fault checks are not performed because an obstructed camera will prevent it from capturing a rearview image, thus classifying this as a level two fault.

[0070] When the camera has no state failure, whether the frame rate of the camera is normal is detected. In the embodiment, the first preset frame rate is 30 frames, and the second preset frame rate is 20 frames. When the frame rate of the camera is less than the calibration shooting frame rate but greater than or equal to 30 frames, the rearview picture shot will not affect the judgment of the user on the rearview traffic environment, and thus is a first-level failure. A message is sent to the 4s store or the service provider through the background for processing, without affecting the use of the user. If the shooting frame rate of the camera is less than 30 frames but greater than 20 frames, the rearview picture is stuck at this time, and the picture may not be updated in time, and thus it is determined that this is a second-level failure. A failure warning is performed on the instrument to remind the driver to pay attention to safety. When the frame rate is lower than or equal to 20 frames, the picture is stuck seriously, which will directly affect the driving of the driver. At this time, the electronic outside rearview mirror system is controlled to restart to exclude the situation that the frame rate of the camera is reduced due to the system. When the electronic outside rearview mirror system restarts successfully, the shooting frame rate of the camera is detected again. If the shooting frame rate is still lower than or equal to 20 frames, the electronic outside rearview mirror system analyzes and detects each frame of picture to detect whether there is a vehicle in the image. If there is a vehicle, a failure warning is performed on the instrument screen of the vehicle, and information such as a lane change danger, please pay attention to the rear vehicle, etc. is displayed.

[0071] Specifically, the failure detection is performed according to the detection priority of the failure event in the display screen failure of the electronic outside rearview mirror system in sequence, including: detecting whether there is a failure in the data decoding of the display screen. If yes, the detection is stopped. Otherwise, whether there is a failure in the display screen state is detected. If there is a failure in the display screen state, the detection is stopped. Otherwise, the display frame rate of the display screen is detected. If the display frame rate is less than the calibration display frame rate and greater than or equal to a third preset frame rate, the detection is stopped. If the display frame rate is less than the third preset frame rate and greater than a fourth preset frame rate, the detection is stopped. If the display frame rate is less than or equal to the fourth preset frame rate, the electronic outside rearview mirror system is restarted, and the display frame rate is detected again after the restart. If the display frame rate is still less than or equal to the fourth preset frame rate after the restart, whether there is a vehicle in the image shot by the camera is detected frame by frame, and a danger warning is performed on the instrument when it is detected that there is a vehicle in the image. The third preset frame rate is greater than the fourth preset frame rate.

[0072] For example, Figure 4As shown, when the system is in normal operation, it is detected whether the data decoding of the display screen is normal, and if there is a data decoding fault, the next step of fault detection will not be performed, because the data decoding fault of the display screen will cause the picture captured by the camera to be unable to be displayed, which will directly affect the driving of the driver, and therefore belongs to the secondary fault, and the system will perform fault reminding on the instrument. When the display screen has no data encoding fault, it is detected whether the display screen state is normal, wherein the display screen state includes a display screen black screen state. If there is a display screen state fault, the next step of fault detection will not be performed, because the display screen black screen will cause the rearview picture to be unable to be displayed, and therefore belongs to the secondary fault.

[0073] When the display screen has no state fault, it is detected whether the refresh frame rate of the display screen is normal. In the embodiment, the third preset frame rate is 30 frames, and the fourth preset frame rate is 20 frames. When the frame rate of the display screen is less than the calibrated display frame rate but greater than or equal to 30 frames, the rearview picture displayed by the display screen will not affect the judgment of the user on the rearview traffic environment, and therefore is a primary fault, and a message is sent to the 4S store or service provider through the background for processing, without affecting the use of the user. If the display frame rate is less than 30 frames but greater than 20 frames, the rearview picture displayed at this time has a lag, and the picture may not be updated in time, and therefore it is determined that this time is a secondary fault, and fault reminding is performed on the instrument to remind the driver to pay attention to safety. When the display frame rate is lower than or equal to 20 frames, it indicates that the picture lag is serious, which will directly affect the driving of the driver, and at this time the electronic outside rearview mirror system is controlled to restart to exclude the situation that the display frame rate is reduced due to the system, and the display frame rate is detected again after the electronic outside rearview mirror system restarts successfully; if the display frame rate is still lower than or equal to 20 frames, the electronic outside rearview mirror system analyzes and detects each frame of picture, detects whether there is a vehicle in the image, and if there is a vehicle, fault reminding is performed on the instrument of the vehicle, and information such as a lane change danger, please pay attention to the rear vehicle, etc. is displayed.

[0074] Preferably, before the detection priority of the fault events in the communication fault, the camera fault and the display screen fault of the electronic outside rearview mirror system is performed in turn, it further includes: performing fault detection on the voltage of the electronic outside rearview mirror system; if there is a voltage fault, performing voltage fault reminding on the instrument, and stopping fault detection. Figure 5 As shown, the specific diagnosis logic is as follows: when the electronic outside rearview mirror system starts, the system first detects whether there is a voltage fault of the electronic outside rearview mirror system, if there is no voltage fault, the subsequent communication fault, camera fault and display screen fault detection are performed, and if there is a voltage fault of the electronic outside rearview mirror system, it may cause the communication module, the camera and the display of the electronic outside rearview mirror to all show a fault state, and therefore the subsequent fault detection is not performed.

[0075] The embodiment of the present application provides a fault detection method of an electronic outside rearview mirror system, priority of fault grades is divided, then fault detection is carried out according to the priority, a fault with a large influence range can be accurately detected, fault false detection and false reporting are avoided, and system faults can be quickly located by development and after-sales personnel. According to the fault detection according to the fault event priority, the maintenance personnel can quickly lock the fault when the fault occurs, the vehicle maintenance efficiency is improved, different reminding modes are selected according to the fault grades, the interference of fault general reminding on normal driving of the driver can be reduced, and driving safety is ensured. According to the priority of the system fault detection, when the fault occurs, a series of faults are not misjudged, the problem processing speed of the after-sales personnel is improved, and user complaints are reduced. In addition, in the case that a plurality of faults occur, the priority of the faults is defined, when the fault with high priority occurs, other faults are not detected, so that the after-sales personnel can quickly lock the fault reason.

[0076] Please refer to Figure 6 , Figure 6 A schematic block diagram of a fault detection device of an electronic outside rearview mirror system provided by the embodiment of the present application is shown.

[0077] As Figure 6 shown, the device comprises:

[0078] A detection module is used for sequentially performing fault detection according to detection priorities of fault events in each fault type of the electronic outside rearview mirror system, wherein the detection priorities are set from large to small according to influence ranges of the fault events;

[0079] A processing module is used for determining whether to report a fault to a background management system or to perform fault reminding on an instrument according to a fault grade of the detected fault event, wherein the fault grade is set according to whether the fault event has an influence on a picture of the electronic outside rearview mirror.

[0080] The device is further used for sequentially performing fault detection according to detection priorities of fault events in communication faults, camera faults and display screen faults of the electronic outside rearview mirror system.

[0081] The device is further used for stopping fault detection after detecting the fault event.

[0082] The device is further used for detecting whether a CAN bus is faulty, if yes, stopping detection, or detecting whether a bus node is faulty.

[0083] The device is further used for detecting whether a camera power supply is faulty, if yes, stopping detection, or detecting whether camera data coding is faulty.

[0084] If the camera data encoding is faulty, stop the detection, otherwise, detect whether the camera state is faulty;

[0085] If the camera state is faulty, stop the detection, otherwise, detect the shooting frame rate of the camera;

[0086] If the shooting frame rate is less than the calibrated shooting frame rate and greater than or equal to the first preset frame rate, stop the detection;

[0087] If the shooting frame rate is less than the first preset frame rate and greater than the second preset frame rate, stop the detection;

[0088] If the shooting frame rate is less than or equal to the second preset frame rate, restart the electronic outside rearview mirror system, and detect the shooting frame rate again after restarting;

[0089] If the shooting frame rate is still less than or equal to the second preset shooting frame rate after restarting, detect whether there is a vehicle in the image shot by the camera frame by frame, and perform a danger warning on the instrument when detecting that there is a vehicle in the image;

[0090] Wherein, the first preset frame rate is greater than the second preset frame rate.

[0091] Wherein, the device is further used for: detecting whether the display screen data decoding is faulty, if yes, stop the detection, otherwise, detect whether the display screen state is faulty;

[0092] If the display screen state is faulty, stop the detection, otherwise, detect the display frame rate of the display screen;

[0093] If the display frame rate is less than the calibrated display frame rate and greater than or equal to the third preset frame rate, stop the detection;

[0094] If the display frame rate is less than the third preset frame rate and greater than the fourth preset frame rate, stop the detection;

[0095] If the display frame rate is less than or equal to the fourth preset frame rate, restart the electronic outside rearview mirror system, and detect the display frame rate again after restarting;

[0096] If the display frame rate is still less than or equal to the fourth preset frame rate after restarting, detect whether there is a vehicle in the image shot by the camera frame by frame, and perform a danger warning on the instrument when detecting that there is a vehicle in the image;

[0097] Wherein, the third preset frame rate is greater than the fourth preset frame rate.

[0098] Wherein, if the fault event has no influence on the picture of the electronic rearview mirror, set the fault level as a first-level fault;

[0099] If the fault event has an influence on the picture of the electronic rearview mirror, a fault level is set to a secondary fault;

[0100] The CAN bus fault, the bus node fault, the shooting frame rate being less than the calibrated shooting frame rate and greater than or equal to a first preset frame rate, and the display frame rate being less than the calibrated display frame rate and greater than or equal to a third preset frame rate are a primary fault.

[0101] The camera power supply fault, the camera data encoding fault, the camera state fault, the shooting frame rate being less than the first preset frame rate and greater than a second preset frame rate, the shooting frame rate being less than or equal to the second preset frame rate, the display screen data decoding fault, the display frame rate being less than the third preset frame rate and greater than a fourth preset frame rate, the display screen state fault, and the display frame rate being less than or equal to the fourth preset frame rate are a secondary fault.

[0102] The device is further configured to:

[0103] If the fault event is a primary fault, the fault is reported to a background management system.

[0104] If the fault event is a secondary fault, a fault reminder is performed on an instrument.

[0105] The device is further configured to:

[0106] The voltage of the electronic outside rearview mirror system is detected for faults.

[0107] If there is a voltage fault, a voltage fault reminder is performed on the instrument, and the fault detection is stopped.

[0108] It should be noted that, for the convenience and brevity of description, the specific working processes of the device and the modules and units described above can refer to the corresponding processes in the foregoing embodiments, and will not be described herein.

[0109] It should be noted that, in this document, the term “comprising” or “including” or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article, or system including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such a process, method, article, or system. Without more limitations, the element defined by the statement “comprising a” does not exclude the presence of additional identical elements in the process, method, article, or system including the element.

[0110] The above-mentioned serial numbers of the embodiments of the present application are only for description, and do not represent the advantages and disadvantages of the embodiments. The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A failure detection method of an electronic outside mirror system, characterized by, include: Fault detection is performed sequentially according to the detection priority of fault events in each fault type of the electronic exterior rearview mirror system, wherein the detection priority is set from large to small according to the impact range of the fault events; The fault level is determined based on whether the fault is reported to the back-end management system or a fault alert is displayed on the instrument panel. The fault level is set according to whether the fault event affects the display of the electronic rearview mirror. Among them, fault detection is performed sequentially according to the detection priority of fault events in the camera-related faults of the electronic exterior rearview mirror system, including: Check if there is a fault in the camera power supply. If so, stop the test; otherwise, check if there is a fault in the camera data encoding. If there is a fault in the camera data encoding, stop the detection; otherwise, check if there is a fault in the camera status. If the camera is malfunctioning, stop the detection; otherwise, check the camera's shooting frame rate. If the shooting frame rate is less than the calibrated shooting frame rate but greater than or equal to the first preset frame rate, then the detection is stopped; If the shooting frame rate is less than the first preset frame rate but greater than the second preset frame rate, then the detection is stopped; If the shooting frame rate is less than or equal to the second preset frame rate, the electronic exterior rearview mirror system is restarted, and the shooting frame rate is detected again after restarting. If the shooting frame rate is still less than or equal to the second preset frame rate after restarting, the camera will detect whether there is a vehicle in the image captured frame by frame, and issue a hazard warning on the instrument panel when a vehicle is detected in the image. Wherein, the first preset frame rate is greater than the second preset frame rate.

2. The failure detection method of an electronic outside mirror system according to claim 1, characterized in that, The fault types include communication faults, camera faults, and display screen faults. Fault detection is performed sequentially according to the detection priority of fault events in each fault type of the electronic rearview mirror system, including: Fault detection is performed sequentially based on the detection priority of fault events among communication faults, camera faults, and display screen faults in the electronic exterior rearview mirror system.

3. The failure detection method of an electronic outside mirror system according to claim 2, characterized in that, Fault detection is performed sequentially according to the detection priority of fault events in each fault type of the electronic exterior rearview mirror system, and also includes: After a fault event is detected, fault detection is stopped.

4. The failure detection method of an electronic outside mirror system according to claim 3, characterized in that, Fault detection is performed sequentially according to the detection priority of fault events in the communication faults of the electronic exterior rearview mirror system, including: The system checks for faults in the CAN bus. If a fault is found, the detection stops; otherwise, it checks for faults in the bus nodes.

5. The method of failure detection of an electronic outside mirror system according to claim 4, characterized in that Fault detection is performed sequentially according to the detection priority of fault events in the display screen type of electronic exterior rearview mirror system, including: The system checks for faults in the data decoding of the display screen. If a fault is found, the detection is stopped; otherwise, the system checks for faults in the display screen status. If the display screen is faulty, stop the detection; otherwise, check the display screen's frame rate. If the displayed frame rate is less than the calibrated display frame rate but greater than or equal to the third preset frame rate, then the detection stops; If the displayed frame rate is less than the third preset frame rate but greater than the fourth preset frame rate, the detection stops. If the displayed frame rate is less than or equal to the fourth preset frame rate, the electronic exterior rearview mirror system is restarted, and the displayed frame rate is detected again after restarting. If the display frame rate is still less than or equal to the fourth preset frame rate after the restart, whether a vehicle exists in the image captured by the camera is detected frame by frame, and a danger warning is performed on the instrument when it is detected that the vehicle exists in the image. The third preset frame rate is greater than the fourth preset frame rate.

6. The failure detection method of an electronic outside mirror system according to claim 5, characterized in that The fault level is set according to whether the fault event has an impact on the picture of the electronic outside rearview mirror, including: If the fault event has no impact on the picture of the electronic rearview mirror, the fault level is set as a first-level fault; If the fault event has an impact on the picture of the electronic rearview mirror, the fault level is set as a second-level fault; The CAN bus fault, bus node fault, shooting frame rate less than the calibrated shooting frame rate and greater than or equal to the first preset frame rate, and the display frame rate less than the calibrated display frame rate and greater than or equal to the third preset frame rate are the first-level fault. The camera power supply fault, camera data encoding fault, camera state fault, shooting frame rate less than the first preset frame rate and greater than the second preset frame rate, shooting frame rate less than or equal to the second preset frame rate, display screen data decoding fault, display frame rate less than the third preset frame rate and greater than the fourth preset frame rate, display screen state fault, and display frame rate less than or equal to the fourth preset frame rate are the second-level fault.

7. The failure detection method of an electronic outside mirror system according to claim 6, characterized in that, According to the fault level of the detected fault event, whether to report the fault to the background management system or to perform fault prompting on the instrument is determined, including: If the level of the fault event is a first-level fault, the fault is reported to the background management system; If the level of the fault event is a second-level fault, fault prompting is performed on the instrument.

8. The electronic exterior mirror system fault detection method according to claim 2, characterized in that, Before the detection priority of the fault event in the communication fault, camera fault and display screen fault of the electronic outside rearview mirror system is performed in turn, it further includes: The voltage of the electronic outside rearview mirror system is detected for fault; If there is a voltage fault, voltage fault prompting is performed on the instrument, and the fault detection is stopped.

9. A failure detection apparatus for an electronic outside mirror system, characterized by It includes: A detection module is configured to perform fault detection in turn according to the detection priority of the fault event in each fault type of the electronic outside rearview mirror system, wherein the detection priority is set from large to small according to the impact range of the fault event; A processing module is configured to determine whether to report the fault to the background management system or to perform fault prompting on the instrument according to the fault level of the detected fault event, wherein the fault level is set according to whether the fault event has an impact on the picture of the electronic outside rearview mirror; The detection module is further configured to: Detect whether the camera power supply has a fault, if yes, stop detection, otherwise, detect whether the camera data encoding has a fault; If the camera data encoding has a fault, stop detection, otherwise, detect whether the camera state has a fault; If the camera state has a fault, stop detection, otherwise, detect the shooting frame rate of the camera; If the shooting frame rate is less than the calibrated shooting frame rate and greater than or equal to the first preset frame rate, stop detection; If the shooting frame rate is less than the first preset frame rate and greater than the second preset frame rate, stop detection; If the shooting frame rate is less than or equal to the second preset frame rate, restart the electronic outside rearview mirror system, and detect the shooting frame rate again after the restart; If the shooting frame rate is still less than or equal to the second preset frame rate after the restart, whether a vehicle exists in the image shot by the camera is detected frame by frame, and a danger warning is performed on the instrument when it is detected that the vehicle exists in the image. The first preset frame rate is greater than the second preset frame rate.

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