A turn signal fault detection method, device and vehicle based on road number

Abstract

Embodiments of the present invention provide a method, device, and vehicle for detecting turn signal faults based on the number of faults. The method comprises: a lighting controller detecting the number of faulty turn signal paths; the lighting controller transmitting a fault signal corresponding to the number of faulty turn signal paths to a vehicle body controller; and the vehicle body controller outputting a human-computer interaction interface corresponding to the fault signal based on the fault signal. By detecting the number of faulty turn signal paths and outputting a corresponding human-computer interaction interface based on the faulty path, the embodiments of the present invention enable personalized settings for further actions specific to the faulty turn signal paths, thereby improving the user experience.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle lighting, and in particular to a turn signal fault detection method based on the number of roads, a turn signal fault detection device based on the number of roads, and a vehicle. Background Art

[0002] Automobile turn signals have an automatic fault diagnosis mechanism. When a fault is detected, they enter fault mode and flash continuously, prompting the user to replace them promptly. Currently, the most common fault diagnosis mechanism for turn signals uses high and low level signals to "tell" the vehicle body controller whether the turn signal is faulty or not, causing the controller to control the turn signal to enter fault mode or operate normally.

[0003] Current turn signals generally use LEDs as light sources, typically consisting of multiple LEDs. To accurately control and monitor each LED, a lighting controller typically drives two LEDs per channel. Therefore, multiple output channels are required for each turn signal. If any LED within a channel fails, the vehicle will detect the fault and control the turn signal to continuously flash at a doubled frequency until the fault is resolved or the entire turn signal is replaced. Normal operation will then resume.

[0004] But the reality is that each turn signal light on a car has dozens or even dozens of lamp beads. The failure of a few LED lamp beads often does not affect the signal function of the turn signal light. When one LED fails, it enters the fault mode and the entire set of turn signals needs to be replaced. This not only increases the economic cost of using the user's car, but the frequent fault reports also have a negative impact on the user's car experience. Summary of the Invention

[0005] In view of the above problems, embodiments of the present invention provide a turn signal fault detection method based on the number of roads, a turn signal fault detection device based on the number of roads, and a vehicle to overcome the above problems or at least partially solve the above problems.

[0006] To solve the above problem, an embodiment of the present invention provides a turn signal fault detection method based on the number of paths, the method comprising:

[0007] The lamp controller detects the number of ways the turn signal lamp fails;

[0008] The lamp controller sends a fault signal corresponding to the number of the turn signal faults to the vehicle body controller;

[0009] The vehicle body controller outputs a human-machine interaction interface corresponding to the fault signal according to the fault signal.

[0010] Optionally, the lamp controller sends a fault signal corresponding to the number of the turn signal faults to the vehicle body controller, including:

[0011] Determining a target duty cycle corresponding to the number of roads where the turn signal lamp fails from a plurality of preset PWM duty cycles;

[0012] A fault signal having the target duty cycle is sent to the vehicle body controller via a PWM signal line between the lamp controller and the vehicle body controller.

[0013] Optionally, determining a target duty cycle corresponding to the number of roads where the turn signal lamp fails from a plurality of preset duty cycles includes:

[0014] When the number of faults in the turn signal lamp is greater than 1, determining the target duty cycle to be a preset first duty cycle, wherein the preset first duty cycle indicates a multi-path fault in the turn signal lamp;

[0015] When the number of faults in the turn signal lamp is 0, determining the target duty cycle to be a preset second duty cycle, wherein the preset second duty cycle indicates that the turn signal lamp is normal;

[0016] When the number of faulty paths of the turn signal lamp is one, the target duty cycle is determined to be a preset third duty cycle, where the preset third duty cycle indicates a single-path fault of the turn signal lamp.

[0017] Optionally, resistors of different resistance values ​​are connected in parallel to a plurality of analog signal lines between the vehicle body controller and the lamp controller; and the lamp controller sends a fault signal corresponding to the number of faulty paths of the turn signal to the vehicle body controller, including:

[0018] Determining, from the plurality of analog signal lines, a target signal line corresponding to the number of lines where the turn signal lamp fails;

[0019] A fault signal having a voltage value corresponding to the resistance on the target signal line is transmitted to the vehicle body controller through the target signal line.

[0020] Optionally, determining, from the plurality of analog signal lines, a target signal line corresponding to the number of lines where the turn signal lamp fails, includes:

[0021] When the number of faulty paths of the turn signal lamp is greater than one, determining that the target signal line is a first analog signal line, and the fault signal sent through the first analog signal line represents a multi-path fault of the turn signal lamp;

[0022] In a case where the number of faulty paths of the turn signal lamp is one, determining that the target signal line is the second analog signal line, and the fault signal sent through the second analog signal line represents a single-path fault of the turn signal lamp;

[0023] When the number of fault paths of the turn signal lamp is 0, the target signal line is determined to be a suspended high-impedance analog signal line, and the fault signal sent through the suspended high-impedance analog signal line indicates that the turn signal lamp is normal.

[0024] Optionally, after the lamp controller sends a fault signal corresponding to the number of the turn signal faults to the vehicle body controller, the method further includes:

[0025] When the number of faults in the turn signal lamp is 1 or greater, the vehicle body controller controls the turn signal lamp to flash at a double frequency according to the fault signal;

[0026] In a case where the number of faults in the turn signal is 0, the vehicle body controller controls the turn signal to respond to a switch signal for turning the turn signal on and off according to the fault signal.

[0027] Optionally, outputting a human-computer interaction interface corresponding to the fault signal includes:

[0028] When the number of faults in the turn signal lamp is 1, a turn signal lamp response option is output on the human-computer interaction interface; wherein the turn signal lamp response option is used to determine whether the turn signal lamp responds to the switch signal;

[0029] After outputting the human-computer interaction interface corresponding to the fault signal, the method further includes:

[0030] When receiving an operation of a response switch signal for the turn signal response option, controlling the turn signal to respond to the switch signal for turning the turn signal on and off;

[0031] When an operation of a disable response switch signal for the turn signal response option is received, the turn signal is controlled to flash at a double frequency.

[0032] Optionally, after presenting the human-computer interaction interface including at least the turn signal response option, the method further includes:

[0033] When the vehicle ignition signal is detected, the vehicle body controller refreshes the human-machine interaction interface to output a turn signal response option on the human-machine interaction interface.

[0034] An embodiment of the present invention further provides a turn signal fault detection device based on the number of paths, the device comprising:

[0035] a lamp controller, configured to detect the number of faulty turn signals, and to send a fault signal corresponding to the number of faulty turn signals to the vehicle body controller;

[0036] The vehicle body controller is used to output a human-computer interaction interface corresponding to the fault signal according to the fault signal.

[0037] An embodiment of the present invention further provides a vehicle, which is configured to execute the steps of the method described in any of the above embodiments.

[0038] It can be seen from the above technical solution that, considering that the relevant technology only detects whether the turn signal is faulty and simply reports the fault directly when a fault occurs, which makes the user's car experience poor, the embodiment of the present invention provides a turn signal fault detection method based on the number of routes, a turn signal fault detection device based on the number of routes and a vehicle. By detecting the number of routes where the automobile turn signal fails and outputting a corresponding human-computer interaction interface according to the number of fault routes, personalized settings for further actions on the number of routes are implemented, so that the user can make independent choices for the fault reporting of turn signals with different fault routes. For example, when the number of faulty lamp beads does not affect the turn signal function, the turn signal is still selected to maintain normal operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a flowchart of a turn signal fault detection method based on the number of paths provided by an embodiment of the present invention;

[0040] Figure 2 This is a block diagram of a system structure for sending fault signals based on PWM technology provided by an embodiment of the present invention;

[0041] Figure 3 This is a block diagram of a system structure for sending fault signals based on analog signal technology provided by an embodiment of the present invention;

[0042] Figure 4 This is a general flow chart of a turn signal fault detection method provided by an embodiment of the present invention;

[0043] Figure 5 This is a structural block diagram of a turn signal fault detection device based on the number of paths provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0045] Turn signals are indicators that activate when turning to alert surrounding vehicles and pedestrians. Because LEDs (light-emitting diodes) light up and shut down instantly, they attract the attention of surrounding vehicles and pedestrians. LEDs also offer numerous advantages, such as energy efficiency, aesthetics, and a long lifespan. Consequently, LEDs are now widely used as light sources in turn signals.

[0046] Considering factors such as cost, heat dissipation, and ease of maintenance, LEDs are often arranged in multiple configurations for turn signals. However, this configuration still has a drawback: if a single LED fails, the entire turn signal assembly containing multiple LEDs must be replaced, a significant expense for vehicle owners.

[0047] The drive control and detection of the turn signal are generally completed directly through the lamp controller. As long as one LED lamp bead fails, the lamp controller will send a level signal to the body controller through the diagnostic line to inform the body controller of the turn signal failure. The body controller will in turn control the turn signal to flash continuously through the lamp controller, and inform the user in the form of sound or picture to remind the user that the turn signal needs to be replaced, and the turn signal will no longer respond to the development signal of the user's control of the turn signal switch.

[0048] However, the above method prevents users from using the turn signal normally if there is any fault in the turn signal, which has a negative impact on the user's driving experience. The replacement cost of the turn signal also burdens the cost of using the car, and the user's driving experience is poor.

[0049] Based on the analysis of the above problems, the embodiments of the present invention provide a turn signal fault detection method based on the number of paths, a turn signal fault detection device based on the number of paths, and a vehicle. By detecting the number of paths of the automobile turn signal fault and outputting a corresponding human-computer interaction interface according to the number of fault paths, personalized settings of further actions for the number of turn signal fault paths are implemented, so that the user can make independent choices for error reporting under different turn signal fault conditions. For example, when the number of faulty lamp beads does not affect the turn signal function, the signal light is still selected to maintain normal operation.

[0050] The embodiments of the present invention are described below with reference to the accompanying drawings.

[0051] Reference Figure 1 , Figure 1 This is a flow chart of the steps of a turn signal fault detection method based on the number of paths provided by an embodiment of the present invention. Figure 1 As shown, an embodiment of the present invention provides a turn signal fault detection method based on the number of paths, the method comprising:

[0052] S31, the lamp controller detects the number of roads where the turn signal lamp fails.

[0053] The turn signal can include a multi-output LED light assembly, where each output drives at least one LED bead, for example, two LED beads. In other words, an LED light assembly includes multiple outputs, and an LED light assembly also includes multiple LED beads. Generally speaking, the LED beads within an LED light assembly are evenly spaced. The turn signal is an LED light assembly located at any corner of the vehicle. For example, the turn signal can be the vehicle's front left turn signal.

[0054] The fault refers to a short circuit or open circuit in at least one of the LEDs driven by one of the turn signal lines. Accordingly, the number of faulty turn signal lines refers to the number of faulty turn signal lines in the turn signal line. For example, a turn signal line includes 20 LEDs, each of which drives 2 LEDs. If 2 of the 20 LEDs are open-circuited and do not illuminate, and these 2 LEDs belong to different lines, then the number of faulty turn signal lines is "2."

[0055] In this embodiment, the lamp controller can detect the voltage or current values ​​of multiple outputs in the turn signal lamp; when the voltage or current value of any output does not meet the preset threshold, it is determined that the turn signal lamp of that output has a fault; then, the number of turn signal lamps with a fault is determined.

[0056] The preset threshold value may be determined based on the operating voltage range or operating current range of the LED lamp bead. Furthermore, the preset threshold value may be the lower limit of the operating voltage or the lower limit of the operating current of one LED lamp bead. When the voltage or current value outputted by any one of the LED lamp bead lines falls below the preset threshold value, the turn signal line is determined to be faulty.

[0057] For example, when the preset threshold is the lower limit of the operating current of one LED lamp bead, the preset threshold, i.e., the lower limit of the operating current, may be 1.1A. When the output current value of one channel is lower than 1.1A, the lamp controller determines that the turn signal of that channel is faulty.

[0058] For example, when the current value of each output path meets the preset threshold, the lamp controller may determine that the number of faulty turn signal paths is "0".

[0059] Through this embodiment, the specific fault path of the turn signal lamp can be determined so as to take corresponding targeted measures.

[0060] S32: The lamp controller sends a fault signal corresponding to the number of the turn signal faults to the vehicle body controller.

[0061] The body controller is an electronic control unit used to control the body electrical system. It can control vehicle devices such as power windows, power rearview mirrors, air conditioning, headlights, turn signals, anti-theft locking system, central locking, defrost device, etc.

[0062] In this embodiment, the fault signal is a preset signal corresponding to the number of lanes where the turn signal is faulty. The fault signal can be an analog signal, such as a circuit signal represented by a preset voltage value. The fault signal can also be a digital signal, such as a PWM (Pulse Width Modulation) signal with a preset duty cycle.

[0063] PWM, while maintaining a constant output frequency, adjusts the duty cycle of the high-level signal within each output cycle through voltage feedback, achieving a stable output voltage using a voltage-stabilized control method. The duty cycle, defined as the ratio of the duration of the high-level signal output within each pulse cycle of the PWM signal level waveform to the duration of the pulse cycle, is used to control the voltage level. For example, if the PWM signal pulse cycle is 50ms and the duration of the high-level signal output within each pulse cycle is 30ms, then the duty cycle of the PWM signal is 60%.

[0064] For example, a PWM signal with a duty cycle of 65% can be used as a fault signal when the number of faults in the turn signal is 1. For further example, when the number of faults in the right front turn signal is 1, the lamp controller corresponding to the right front turn signal sends a PWM signal with a duty cycle of 65% to the body controller, so that the body controller knows that the number of faults in the right front turn signal is 1.

[0065] S33: The vehicle body controller outputs a human-machine interface corresponding to the fault signal based on the fault signal. The human-machine interface may provide the user with options for performing corresponding operations based on the number of roads where the turn signal is faulty, allowing the user to select whether to control the faulty turn signal to flash or operate normally. Furthermore, the user may receive a fault reminder in the form of images, text, or sound when the turn signal is faulty.

[0066] Among them, the human-computer interaction interface is a user interface used to realize interaction and information exchange between the vehicle system and the user.

[0067] In this embodiment, the vehicle body controller may output a human-computer interaction interface corresponding to the number of routes where the turn signal fails, based on the fault signal corresponding to the number of routes where the turn signal fails.

[0068] Specifically, when the number of turn signal failures is not 0 and the number of turn signal failures does not affect the signal function of the turn signal, the body controller outputs a human-computer interaction interface corresponding to the fault signal to provide a fault reminder, such as a yellow turn signal icon, and provides the user with the option of choosing whether the turn signal should continue to work normally; when the number of turn signal failures affects the signal function of the turn signal, the body controller outputs a human-computer interaction interface corresponding to the fault signal to provide a fault reminder, such as a red turn signal icon; when the number of turn signal failures is 0, the body controller outputs a human-computer interaction interface indicating the normal operation of the turn signal, such as a green turn signal icon.

[0069] Through this embodiment, the specific number of vehicle turn signal faults is detected, and a corresponding human-computer interaction interface is output according to the fault number, which can realize personalized setting of further actions for the number of turn signal faults and improve the user's car experience.

[0070] In the related art, in case of a turn signal failure, the lamp controller and the body controller communicate via a diagnostic line. The diagnostic line can send two level signals, a high level signal and a low level signal, which are used to indicate a turn signal failure and a normal turn signal respectively.

[0071] In an embodiment of the present invention, the number of faulty turn signal paths can be represented by multiple different signals. In this embodiment, PWM communication can be selected to avoid adding additional diagnostic lines for communication. Therefore, in an optional implementation, an embodiment of the present invention further provides a method for sending a PWM signal, the method comprising the following steps:

[0072] Step S41 : determining a target duty cycle corresponding to the number of roads where the turn signal lamp fails from a plurality of preset PWM duty cycles.

[0073] In this embodiment, multiple PWM duty cycles can be set as needed. Specifically, multiple PWM duty cycles with different values ​​can be set incrementally according to the number of turn signal lines that have failed, and correspond one to one with the number of turn signal lines that have failed.

[0074] For example, when the turn signal light has a total of 10 outputs, a fault in output 0 corresponds to a PWM duty cycle of 0%, a fault in output 1 corresponds to a PWM duty cycle of 10%, and so on, a fault in output 10 corresponds to a PWM duty cycle of 100%.

[0075] Step S42: Sending a fault signal having the target duty cycle to the vehicle body controller via the PWM signal line between the lamp controller and the vehicle body controller.

[0076] The PWM signal line can be a common circuit conductor, using the existing diagnostic line between the lamp controller and the body controller. The body controller's MCU (Microcontroller Unit) main control chip generally has a PWM acquisition port that can be used to collect PWM signals so that the MCU main control chip can analyze the PWM signals.

[0077] Specifically, after the lamp controller determines the target duty cycle, it sends a PWM signal at the target duty cycle to the body controller. The body controller then collects the PWM signal via the PWM acquisition port of the MCU chip to determine the number of faulty turn signal lines based on a preset first correspondence. The preset first correspondence is a correspondence between the number of faulty turn signal lines and the PWM duty cycle, stored in the body controller.

[0078] For example, the duty cycle of the PWM signal corresponding to M turn signal fault paths is preset to be 50%. When the duty cycle of the PWM signal of the vehicle body controller is 50%, it is determined that the number of turn signal fault paths is M.

[0079] Therefore, through the above embodiment, the transmission of fault signals of different fault paths of the turn signal can be realized without adding diagnostic lines and signal acquisition ports, so that the body controller can output different corresponding human-computer interaction interfaces according to the fault signals.

[0080] Furthermore, considering that most turn signal failures are single-circuit failures, a single fault in the entire turn signal generally does not affect the turn signal function. Therefore, in order to further simplify the fault detection function, reduce the use of data and computing resources throughout the process, and improve the stability of fault detection, in an optional embodiment, the present invention further provides a method for determining a target duty cycle, which specifically includes:

[0081] S411 , when the number of faulty paths of the turn signal lamp is greater than 1, determining a target duty cycle as a preset first duty cycle, where the preset first duty cycle indicates a multi-path fault of the turn signal lamp.

[0082] The number of faulty turn signals is greater than one, that is, two or more turn signal signals are faulty. The preset first duty cycle may be a maximum PWM duty cycle among all preset PWM duty cycles, and may be 65% by way of example.

[0083] S412 , when the number of faults in the turn signal is 0, determining the target duty cycle to be a preset second duty cycle, where the preset second duty cycle indicates that the turn signal is normal.

[0084] The number of turn signal lines with faults is 0, that is, all turn signal lines are operating normally without faults. The preset second duty cycle may be a PWM duty cycle that is the minimum value among all preset PWM duty cycles, and may be 25% by way of example.

[0085] S413 : When the number of faulty paths of the turn signal lamp is 1, determine the target duty cycle to be a preset third duty cycle, where the preset third duty cycle indicates a single-path fault of the turn signal lamp.

[0086] The number of faulty turn signal lines is 1, that is, one turn signal line is faulty. The preset third duty cycle may be a PWM duty cycle that is an intermediate value among all preset PWM duty cycles, and may be 45% by way of example.

[0087] Through this embodiment, the turn signal fault is divided into three fault conditions, namely "single-path fault", "multi-path fault", and "normal without fault", according to the number of fault paths of the turn signal. Three PWM signals with different duty cycles are used to represent these three fault conditions respectively. Because single-path fault of most types of turn signals will not affect the signal function, the fault detection function is simplified while being applicable to most types of turn signals, which can effectively improve the stability of fault detection.

[0088] Figure 2 This is a block diagram of a system structure for sending fault signals based on PWM technology provided by an embodiment of the present invention. Figure 2 As shown, an embodiment of the present invention provides a system for sending fault signals based on PWM technology. The system includes: a body controller, a lamp controller, an instrument controller, a vehicle controller, an external light combination switch, and a PWM signal line between the body controller and the lamp controller. Based on the system, an embodiment of the present invention provides a method for sending fault signals based on PWM technology, including:

[0089] After the body controller receives the switch signal for controlling the turn signal switch from the external light combination switch via the hard-wired signal line, it sends the switch signal to the lamp controller via the hard-wired signal line;

[0090] The lighting controller drives a set of 6 LED lamp beads for the turn signal, each of which includes 2 LED lamp beads;

[0091] After the body controller detects that there is a fault in the LED lamp bead and determines the number of the faulty LED lamp bead, the fault signal is sent to the body controller in the form of a PWM signal through the PWM signal line.

[0092] The body controller outputs the corresponding human-computer interaction interface according to the number of turn signal failures.

[0093] Among them, both the instrument controller and the vehicle controller can use CAN network signals to control the body controller.

[0094] In some cases, the PWM acquisition port of the MCU chip of the body controller may be a scarce port resource. In order to allocate the PWM acquisition port resources as much as possible to other core functions, the PWM acquisition port cannot be occupied. Therefore, in an optional embodiment, an embodiment of the present invention further provides a method for sending analog signals, wherein resistors of different resistance values ​​are connected in parallel to multiple analog signal lines between the body controller and the lamp controller. The method specifically includes:

[0095] S51, determining, from the plurality of analog signal lines, a target signal line corresponding to the number of lines where the turn signal lamp fails.

[0096] In this embodiment, a plurality of analog signal lines are connected in parallel to the vehicle body controller and the lamp controller, and each analog signal line has a resistor with a different resistance value.

[0097] The multiple analog signal lines may correspond to different fault paths of the turn signal, and the target signal line is the analog signal line used to send the fault signal. For example, when the turn signal has N fault paths, the target signal line used to send the fault signal may be determined to be the Nth analog signal line.

[0098] S52 , sending a fault signal having a voltage value corresponding to the resistance on the target signal line to the vehicle body controller through the target signal line.

[0099] Among them, the analog signal lines correspond one-to-one to the number of paths where the turn signal lights fail, and resistors of different resistance values ​​are connected in parallel on multiple analog signal lines. When the current value output by the lamp controller to each analog signal line is constant, the fault signal with a voltage value of the resistor on the target signal line sent through the target signal line is a signal that can uniquely indicate the number of paths where the turn signal lights fail.

[0100] Specifically, after determining the target signal line, the lamp controller outputs current to the target signal line. Subsequently, the body controller uses a multi-channel switch acquisition chip to acquire the voltage value of the resistor on the target signal line through the I / O port of the MCU chip, thereby determining the number of faulty turn signal lines based on a preset second correspondence. The preset second correspondence is a correspondence between the number of faulty turn signal lines and the analog signal voltage value, stored in the body controller.

[0101] For example, it is preset that the voltage value of the fault signal corresponding to N turn signal faults is 5V. When the voltage value collected by the vehicle body controller is 5V, it is determined that the number of turn signal faults is N.

[0102] Through the above embodiment, the transmission of fault signals of different number of turn signal faults is achieved by using analog signal technology without occupying PWM port resources.

[0103] Considering that most turn signal failures are single-line failures, meaning only one line of the entire turn signal fails, this generally does not affect the turn signal's signal function. Therefore, to further simplify the analog signal technology fault detection function, reduce circuit scale, and improve fault detection stability, an optional embodiment of the present invention further provides a method for determining a target signal line, which specifically includes:

[0104] S511 , when the number of faulty paths of the turn signal lamp is greater than 1, determining that the target signal line is a first analog signal line, and the fault signal sent through the first analog signal line represents a multi-path fault of the turn signal lamp.

[0105] The number of faulty turn signal lines is greater than one, that is, two or more turn signal lines are faulty. A resistor with a relatively large resistance value can be set on the first analog signal line, for example, a 1K chip resistor with a resistance value of 1000 ohms.

[0106] S512: When the number of faulty paths of the turn signal lamp is 1, determine that the target signal line is the second analog signal line, and the fault signal sent through the second analog signal line represents a single-path fault of the turn signal lamp.

[0107] The number of faulty turn signal lines is 1, that is, one turn signal line has a fault. A resistor with a relatively small resistance value can be set on the second analog signal line, for example, a chip resistor with a model of 300R and a resistance value of 300 ohms.

[0108] S513 , when the number of fault paths of the turn signal lamp is 0, determining that the target signal line is a suspended high-impedance analog signal line, and the fault signal sent through the analog signal line indicates that the turn signal lamp is normal.

[0109] The number of faulty turn signal lines is 0, meaning all turn signal lines are operating normally. A floating high-impedance state means both analog signal lines are disconnected and no input current is drawn from the lighting controller, resulting in a high-impedance open circuit. Therefore, floating high-impedance analog signal lines are virtual analog signal lines and do not require hardware circuit configuration.

[0110] Through this embodiment, two analog signal lines with different resistance values ​​are connected in parallel, and different signal lines or floating high-impedance states are used to represent the three fault conditions of the turn signal: "single-path fault", "multi-path fault", and "normal without fault". Because single-path fault of most types of turn signals will not affect the signal function, the fault detection function and the hardware circuit scale of the analog circuit are simplified while being applicable to most types of turn signals, and the stability of fault detection can be effectively improved.

[0111] Figure 3 This is a block diagram of a system structure for sending fault signals based on analog signal technology provided by an embodiment of the present invention. Figure 3 As shown, an embodiment of the present invention provides a system for sending fault signals using analog signal technology. The system includes: a body controller, a lamp controller, an instrument controller, a vehicle controller, an external light combination switch, a first analog signal line between the body controller and the lamp controller, and a second analog signal line between the body controller and the lamp controller. Based on the system, an embodiment of the present invention provides a method for sending fault signals using analog signal technology, specifically including:

[0112] After the body controller receives the switch signal for controlling the turn signal switch from the external light combination switch via the hard-wired signal line, it sends the switch signal to the lamp control via the hard-wired signal line;

[0113] The lighting controller drives a set of 6 LED lamp beads for the turn signal, each of which includes 2 LED lamp beads;

[0114] Because the resistance values ​​on the two analog signal lines are different, after the body controller detects that an LED lamp bead is faulty and determines the number of LED lamp bead paths that are faulty, it sends the fault signal in the form of analog signals with different voltage values ​​to the body controller through one of the two analog signal lines.

[0115] The body controller outputs the corresponding human-computer interaction interface according to the number of turn signal failures.

[0116] Among them, the instrument controller and the vehicle controller can use CAN network signals to control the body controller.

[0117] When a turn signal fails, whether one or more turns are faulty, the system should immediately enter a fault mode before the user makes a personalized selection, prompting the user to repair or replace the turn signal. In an optional embodiment, the present invention further provides a turn signal fault alarm method, which specifically includes:

[0118] In step S61, when the number of faults in the turn signal is 1 or greater than 1, the vehicle body controller controls the turn signal to flash at a double frequency according to the fault signal.

[0119] Among them, after the body controller knows that the number of ways the turn signal fails is not 0, it sends a control signal to the lamp controller to control the turn signal to flash at a double frequency, and the turn signal no longer responds to the switch signal of the turn signal switch generated by the user operation.

[0120] In step S62, when the number of faults in the turn signal is 0, the vehicle body controller controls the turn signal to respond to a switch signal for turning the turn signal on and off according to the fault signal.

[0121] Among them, after the body controller knows that the number of ways the turn signal fails is 0, it can generate a switch signal for controlling the turn signal switch according to the user operation in a normal working mode, and send the switch signal to the lamp controller so that the turn signal responds to the switch signal to complete the opening or closing action.

[0122] Through the above embodiment, after a turn signal fault is detected, the turn signal is immediately controlled to enter a fault mode and flash at a double frequency, so that the user can timely understand the functional status of the turn signal. In the subsequent steps, the user decides whether to stop flashing at a double frequency so that the turn signal responds to the switch signal.

[0123] In the event that the number of turn signal failures is small and the signal function is not affected, in order to enable the user to decide whether to continue to use the turn signal normally, in an optional embodiment, the embodiment of the present invention further provides a method for human-computer interaction for fault detection, which specifically includes:

[0124] Step S71: when the number of the turn signal failures is 1, outputting a turn signal response option on the human-computer interaction interface; wherein the turn signal response option is used to determine whether the turn signal responds to a switch signal.

[0125] Since LED turn signals generally have at least six channels, even if only one channel fails, five channels will still function normally, without affecting the turn signal function. Therefore, in this embodiment, if only one channel fails, the user can independently select whether the turn signal responds to the switch signal, that is, whether it functions normally, through the turn signal response option displayed on the human-computer interface.

[0126] Specifically, the turn signal response options may include responding to a switch signal and prohibiting responding to a switch signal.

[0127] Step S72: upon receiving an operation of a response switch signal for the turn signal response option, controlling the turn signal to respond to the switch signal for turning the turn signal on and off.

[0128] Specifically, when the user chooses to respond to the switch signal, the turn signal stops flashing at a double frequency and starts to respond to the switch signal normally again.

[0129] Step S73: When receiving the operation of the disable response switch signal for the turn signal response option, controlling the turn signal to flash at a double frequency.

[0130] Specifically, when the vehicle body controller receives a user-selected disable response switch signal, the turn signal is controlled to continuously flash at a double frequency and the turn signal is prevented from responding to the switch signal.

[0131] Through this embodiment, when a single-circuit fault occurs in the turn signal, a human-computer interaction interface containing turn signal response options is output, allowing the user to independently decide whether the turn signal can continue to work normally, that is, respond to the switch signal to complete the personalized setting for fault detection.

[0132] In combination with the above embodiments, this embodiment can collect the fault status of turn signal lights with multiple different fault paths through a diagnostic line based on PWM technology, or, without occupying PWM port resources, collect the fault status of turn signal lights with multiple different fault paths based on analog signal technology. Without the need to make major changes to the hardware used in the original technical solution, the interaction between the vehicle computer and the user in signal light fault detection can be realized, and personalized settings for fault detection can be completed. With lower software and hardware design costs, the user's car experience can be improved and the user's car cost can be reduced.

[0133] Furthermore, in the event of a single-circuit turn signal failure, if the user chooses to maintain the turn signal failure mode, after controlling the turn signal to flash at a double frequency, the turn signal will no longer respond to the user's on / off signal. Driving in this situation is risky because it may affect the judgment of surrounding vehicles and people on the vehicle's steering intention. To reduce the user's driving risk, in an optional embodiment, the present invention further provides a method for reselecting a single-circuit fault response, which specifically includes:

[0134] When the vehicle ignition signal is detected, the vehicle body controller refreshes the human-machine interaction interface to output a turn signal response option on the human-machine interaction interface.

[0135] Through the above embodiment, when there is a single-circuit fault in the turn signal and the user selects the turn signal to maintain the fault mode and not respond to the switch operation, when the user ignites and starts the vehicle again, if the turn signal has not been repaired or replaced, the body controller will remind the user again whether to maintain the normal operation of the turn signal, so as to restore the normal operation of the turn signal in time, thereby reducing driving risks.

[0136] Reference Figure 4 , Figure 4 This is a flow chart of turn signal fault detection provided by an embodiment of the present invention.

[0137] like Figure 4 As shown, the present invention provides a process for detecting a turn signal fault, including:

[0138] Step S81: When the turn signal switch remains in an effective state, the body controller collects the switch signal of the external light combination switch through the hard-wired signal line between the body controller and the lamp controller, and then sends an enable signal to enable the lamp controller through the hard-wired signal line between the body controller and the lamp controller.

[0139] Step S82: After the lamp controller is enabled, it drives and detects whether the turn signal lamp has an open circuit fault; if so, the process proceeds to step S83; if not, the process proceeds to step S89;

[0140] In step S83, the lamp controller detects whether a single LED of the turn signal lamp is faulty, i.e., there is only one faulty LED; if it is a single faulty LED, the process proceeds to step S84; if not, the process proceeds to step S85;

[0141] In step S85, the vehicle body controller controls the turn signal lamp to enter the fault working mode, the turn signal lamp flashes at a double frequency, and the vehicle instrument panel prompts the user to repair or replace the turn signal lamp in the form of graphics, text, sound and light until the lamp lamp is replaced or repaired, and then enters the normal working mode;

[0142] In step S86, the vehicle body controller controls the turn signal to flash at a double frequency, and the vehicle instrument panel prompts the user of the turn signal fault in the form of images, text, sound, and light. A pop-up window on the vehicle human-machine interface prompts whether to turn off the fault, that is, whether to stop the turn signal flashing at a double frequency and whether to stop reminding the user of the turn signal fault during the current driving. If the fault is turned off, the process proceeds to step S88; if not, the process proceeds to step S87.

[0143] Step S87: Maintain the fault mode, and when the vehicle ignition operation is detected, the vehicle human-machine interaction interface pops up again to ask whether to close the fault.

[0144] Step S88: The vehicle body controller controls the turn signal lamp to enter a normal working mode through the lamp controller;

[0145] Step S89: The turn signal lamp works normally, and in response to the received switch signal, the vehicle instrument panel indicates a normal reminder.

[0146] Through this embodiment, when the body controller enables the lamp controller, the lamp controller first detects whether there is an open circuit fault in the turn signal, and then detects whether the fault of the turn signal is a single-circuit fault. When it is determined that the fault of the turn signal is a single-circuit fault, the body controller provides corresponding human-computer interaction options. Through the human-computer interaction interface, the user can choose whether the other non-faulty paths of the turn signal continue to work normally, so that the user can simply and quickly participate in the personalized settings of the turn signal fault detection, effectively improving the user's car experience.

[0147] Reference Figure 5 , Figure 5 This is a structural block diagram of a turn signal fault detection device based on the number of paths provided by an embodiment of the present invention. Figure 5 As shown, based on the same inventive concept, an embodiment of the present invention further provides a turn signal fault detection device based on the number of paths, the device comprising:

[0148] The lamp controller 91 is used to detect the number of faulty turn signals and send a fault signal corresponding to the number of faulty turn signals to the vehicle body controller;

[0149] The vehicle body controller 92 is configured to output a human-machine interaction interface corresponding to the fault signal according to the fault signal.

[0150] Based on the same inventive concept, an embodiment of the present invention further provides a vehicle, which is configured to execute the steps of the method described in any of the above embodiments.

[0151] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0152] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they become aware of the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present invention.

[0153] Finally, it should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or terminal device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or terminal device that includes the element.

[0154] The above is a detailed introduction to a turn signal fault detection method based on the number of roads, a turn signal fault detection device based on the number of roads, and a vehicle provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. A turn signal fault detection method based on the number of paths, characterized in that: The method comprises: The lamp controller detects the number of ways the turn signal lamp fails; The lamp controller sends a fault signal corresponding to the number of the turn signal faults to the vehicle body controller; The vehicle body controller outputs a human-computer interaction interface corresponding to the fault signal according to the fault signal; Outputting a human-computer interaction interface corresponding to the fault signal, including: When the number of faults in the turn signal lamp is 1, a turn signal lamp response option is output on the human-computer interaction interface; wherein the turn signal lamp response option is used to determine whether the turn signal lamp responds to the switch signal; After outputting the human-computer interaction interface corresponding to the fault signal, the method further includes: When receiving an operation of a response switch signal for the turn signal response option, controlling the turn signal to respond to the switch signal for turning the turn signal on and off; When an operation of a prohibition switch signal for the turn signal response option is received, the turn signal is controlled to flash at a double frequency and the turn signal is prevented from responding to the switch signal.

2. The method according to claim 1, characterized in that The lamp controller sends a fault signal corresponding to the number of the turn signal faults to the vehicle body controller, including: Determining a target duty cycle corresponding to the number of roads where the turn signal lamp fails from a plurality of preset PWM duty cycles; A fault signal having the target duty cycle is sent to the vehicle body controller via a PWM signal line between the lamp controller and the vehicle body controller.

3. The method according to claim 2, characterized in that Determining a target duty cycle corresponding to the number of roads where the turn signal lamp fails from a plurality of preset duty cycles includes: When the number of faults in the turn signal lamp is greater than 1, determining the target duty cycle to be a preset first duty cycle, wherein the preset first duty cycle indicates a multi-path fault in the turn signal lamp; When the number of faults in the turn signal lamp is 0, determining the target duty cycle to be a preset second duty cycle, wherein the preset second duty cycle indicates that the turn signal lamp is normal; When the number of faulty paths of the turn signal lamp is one, the target duty cycle is determined to be a preset third duty cycle, where the preset third duty cycle indicates a single-path fault of the turn signal lamp.

4. The method according to claim 1, wherein Resistors of different resistance values ​​are connected in parallel on a plurality of analog signal lines between the vehicle body controller and the lamp controller; the lamp controller sends a fault signal corresponding to the number of faults in the turn signal to the vehicle body controller, including: Determining, from the plurality of analog signal lines, a target signal line corresponding to the number of lines where the turn signal lamp fails; A fault signal having a voltage value corresponding to the resistance on the target signal line is transmitted to the vehicle body controller through the target signal line.

5. The method according to claim 4, characterized in that Determining, from the plurality of analog signal lines, a target signal line corresponding to a number of lines where the turn signal lamp fails, comprises: When the number of faulty paths of the turn signal lamp is greater than one, determining that the target signal line is a first analog signal line, and the fault signal sent through the first analog signal line represents a multi-path fault of the turn signal lamp; In a case where the number of faulty paths of the turn signal lamp is one, determining that the target signal line is the second analog signal line, and the fault signal sent through the second analog signal line represents a single-path fault of the turn signal lamp; When the number of fault paths of the turn signal lamp is 0, the target signal line is determined to be a suspended high-impedance analog signal line, and the fault signal sent through the suspended high-impedance analog signal line indicates that the turn signal lamp is normal.

6. The method according to claim 1, wherein After the lamp controller sends a fault signal corresponding to the number of the turn signal lines on which the turn signal has failed to fail to the vehicle body controller, the method further includes: When the number of faults in the turn signal lamp is greater than 1, the vehicle body controller controls the turn signal lamp to flash at a double frequency according to the fault signal; In a case where the number of faults in the turn signal is 0, the vehicle body controller controls the turn signal to respond to a switch signal for turning the turn signal on and off according to the fault signal.

7. The method according to claim 1, characterized in that After controlling the turn signal light to flash at a double frequency, the method further includes: When the vehicle ignition signal is detected, the vehicle body controller refreshes the human-machine interaction interface to output a turn signal response option on the human-machine interaction interface.

8. A turn signal fault detection device based on the number of roads, characterized in that: The device comprises: a lamp controller, configured to detect the number of faulty turn signals, and to send a fault signal corresponding to the number of faulty turn signals to the vehicle body controller; A vehicle body controller, configured to output a human-machine interaction interface corresponding to the fault signal according to the fault signal; Outputting a human-computer interaction interface corresponding to the fault signal, including: When the number of faults in the turn signal lamp is 1, a turn signal lamp response option is output on the human-computer interaction interface; wherein the turn signal lamp response option is used to determine whether the turn signal lamp responds to the switch signal; After outputting the human-computer interaction interface corresponding to the fault signal, the method further includes: When receiving an operation of a response switch signal for the turn signal response option, controlling the turn signal to respond to the switch signal for turning the turn signal on and off; When an operation of a prohibition switch signal for the turn signal response option is received, the turn signal is controlled to flash at a double frequency and the turn signal is prevented from responding to the switch signal.

9. A vehicle, characterized in that: The vehicle is configured to perform the steps of the method according to any one of claims 1-7.

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