CN112124225A - Fault diagnosis system and method for running water steering lamp, vehicle body controller and vehicle - Google Patents
Fault diagnosis system and method for running water steering lamp, vehicle body controller and vehicle Download PDFInfo
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Abstract
The application relates to a running water turn signal lamp fault diagnosis system, a running water turn signal lamp fault diagnosis method, a vehicle body controller and a vehicle, wherein the system comprises: the running water turn light module comprises a left turn light module and a right turn light module which are connected in parallel; the left turn signal lamp module continuously outputs a left feedback signal under the condition of working state; the right turn light module continuously outputs a right feedback signal under the condition of working state; and the automobile body controller is connected with the left steering lamp module and the right steering lamp module which are connected in parallel and used for receiving the left feedback signal or the right feedback signal, detecting whether the left feedback signal or the right feedback signal is subjected to level turnover in a preset time period of each power supply cycle, and obtaining a fault diagnosis result according to the detection result. The method and the device can save hardware resources of the vehicle body controller, time-sharing diagnosis is carried out on the left steering lamp module and the right steering lamp module, and accuracy of fault diagnosis is improved.
Description
Technical Field
The application relates to the technical field of automobiles, in particular to a system and a method for diagnosing faults of a running water steering lamp, an automobile body controller and an automobile.
Background
In a conventional automobile, a bulb turn light is often used, and no fault feedback line is provided. The power of a single bulb steering lamp is 21W (watt), and the driving power of a side steering lamp is fixed due to the fixed power of the single bulb steering lamp (the side power is 2 21W steering lamps plus 5W, namely 47W generally). When the vehicle body controller drives the steering lamp on one side, the current can be detected through an internal chip of the vehicle body controller to distinguish whether the steering lamp breaks down, the failure mode of the bulb steering lamp is single, and at least 21W power disappears under the condition of damage.
With the development of automotive electronics technology, LED (Light Emitting Diode) flow direction indicator lamps have appeared, and generally comprise a plurality of LED modules. The total power of the LED flowing water steering lamp is small, the working current is small, and the working current is changed from small to large. The vehicle body controller cannot identify single LED faults through current detection, and therefore the LED flowing water steering lamp is provided with a fault feedback line. The vehicle body controller can diagnose the state of the running water turn light through the feedback of the fault feedback line.
However, the conventional technology needs to use more hardware resources when connecting the running water turn signal lamp and the vehicle body controller, and is easy to make a false alarm during fault diagnosis, and cannot realize high-accuracy fault diagnosis with less hardware resources.
Disclosure of Invention
In view of the above, it is necessary to provide a system, a method, a vehicle body controller and a vehicle for diagnosing a malfunction of a flow-through turn lamp, which can achieve high accuracy with less hardware resources.
A running water turn signal fault diagnostic system comprising:
the running water turn light module comprises a left turn light module and a right turn light module which are connected in parallel; the left turn signal lamp module continuously outputs a left feedback signal under the condition of working state; the right turn light module continuously outputs a right feedback signal under the condition of working state;
and the automobile body controller is connected with the left steering lamp module and the right steering lamp module which are connected in parallel and used for receiving the left feedback signal or the right feedback signal, detecting whether the left feedback signal or the right feedback signal is subjected to level turnover in a preset time period of each power supply cycle, and obtaining a fault diagnosis result according to the detection result.
In one embodiment, the vehicle body controller is used for confirming that the corresponding turn light module is in a normal state under the condition that the occurrence of level inversion is detected; and under the condition that the level inversion is not detected, confirming that the corresponding turn light module is in a fault state.
In one embodiment, the vehicle body controller is used for sending a driving signal to the corresponding steering lamp module when receiving a steering lamp turn-on instruction; the driving signal is a signal with level reversal in each power supply period;
the left turn light module is used for entering a working state under the condition of receiving the driving signal and outputting a left feedback signal according to the driving signal; and the right turn light module is used for entering a working state under the condition of receiving the driving signal and outputting a right feedback signal according to the driving signal.
In one embodiment, the left turn light module comprises a left front turn light unit and a left rear turn light unit; the right turn light module comprises a right front turn light unit and a right rear turn light unit;
the left front steering lamp unit and the right front steering lamp unit are connected in parallel and connected with the vehicle body controller; the left rear steering lamp unit and the right rear steering lamp unit are connected in parallel and are connected with the vehicle body controller.
In one embodiment, the left rear turn signal lamp unit includes a left rear fixed side turn signal lamp and a left rear movable side turn signal lamp; the right rear turn lamp unit comprises a right rear fixed side turn lamp and a right rear movable side turn lamp;
the left rear fixed side steering lamp and the right rear fixed side steering lamp are connected in parallel and are connected with the vehicle body controller; the left rear moving side steering lamp and the right rear moving side steering lamp are connected in parallel and are connected with the vehicle body controller.
A vehicle comprises the running water steering lamp fault diagnosis system.
In the running water turn light fault diagnosis system and the vehicle, the left turn light module and the right turn light module are connected in parallel, the left turn light module and the right turn light module after being connected in parallel are connected with the vehicle body controller, the vehicle body controller can receive a left feedback signal output by the left turn light module in a working state or a right feedback signal output by the right turn light module in the working state and detect the received feedback signals to confirm whether the feedback signals are subjected to level inversion in a preset time period of each power supply period, and a fault diagnosis result is obtained according to the detection result, so that hardware resources of the vehicle body controller can be saved, time-sharing diagnosis is performed on the left turn light module and the right turn light module, and the fault diagnosis accuracy is improved.
A fault diagnosis method for a running water steering lamp is characterized by comprising the following steps:
receiving a left feedback signal or a right feedback signal; the left feedback signal is a signal continuously output by the left turn signal lamp module under the condition of working state; the right feedback signal is a signal continuously output by the right turn light module under the condition of working state;
and detecting whether the level of the left feedback signal or the right feedback signal is reversed within a preset time period of each power supply cycle, and obtaining a fault diagnosis result according to the detection result.
In one embodiment, the step of obtaining the fault diagnosis result according to the detection result includes:
confirming that the corresponding turn light module is in a normal state under the condition of detecting that level overturning occurs;
and under the condition that the level inversion is not detected, confirming that the corresponding turn light module is in a fault state.
In one embodiment, the running water turn signal lamp fault diagnosis method further includes:
under the condition of receiving a turn-on instruction of a turn light, sending a driving signal to a corresponding turn light module; the driving signal is a signal with level reversal in each power supply period; the driving signal is used for indicating the corresponding steering lamp module to enter a working state and outputting a corresponding feedback signal.
In one embodiment, the driving signal is high level within 0 to 400 milliseconds of the power supply period and low level within 400 to 800 milliseconds of the power supply period;
the step of detecting whether the level of the left feedback signal or the right feedback signal is reversed in the preset time interval of each power supply cycle comprises the following steps:
it is detected whether the left side feedback signal or the right side feedback signal is flipped from the low level to the high level within 300 msec to 500 msec of each power supply period.
A running water turn signal lamp fault diagnosis device comprising:
the feedback signal receiving module is used for receiving a left feedback signal or a right feedback signal; the left feedback signal is a signal continuously output by the left turn signal lamp module under the condition of working state; the right feedback signal is a signal continuously output by the right turn light module under the condition of working state;
and the fault diagnosis result acquisition module is used for detecting whether the left feedback signal or the right feedback signal is subjected to level inversion within a preset time period of each power supply cycle, and acquiring a fault diagnosis result according to the detection result.
When the vehicle body controller executes a computer program, the steps of the method for diagnosing the fault of the running water steering lamp are realized.
A computer-readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, carries out the steps of the above-mentioned method for diagnosing a malfunction of a flow-through turn lamp.
In the method and the device for diagnosing the fault of the running water steering lamp, the vehicle body controller and the computer readable storage medium, a left side feedback signal or a right side feedback signal is received; the left feedback signal is a signal continuously output by the left turn signal lamp module under the condition of working state; the right feedback signal is a signal continuously output by the right turn light module under the condition of working state; whether level overturning occurs to the left feedback signal or the right feedback signal within a preset time period of each power supply cycle is detected, and a fault diagnosis result is obtained according to the detection result, so that time-sharing diagnosis can be performed on the left steering lamp module and the right steering lamp module, and the accuracy of fault diagnosis is improved.
Drawings
FIG. 1 is a first schematic block diagram of an embodiment of a fault diagnosis system for a flow-through turn signal;
FIG. 2 is a signal diagram illustrating a power cycle in one embodiment;
FIG. 3 is a timing diagram of the left feedback signal or the right feedback signal in one embodiment;
FIG. 4 is a second schematic block diagram of an embodiment of a fault diagnosis system for a flow-through turn signal;
FIG. 5 is a schematic flow chart diagram illustrating a method for diagnosing a malfunction of an embodiment of a flow control lamp;
FIG. 6A is a timing diagram of driving signals according to one embodiment;
FIG. 6B is a timing diagram of the feedback signal in one embodiment;
FIG. 6C is a timing diagram of the actual output signal of the turn signal module in one embodiment;
fig. 7 is a block diagram showing a configuration of a fault diagnosis apparatus for an embodiment of the flow direction lamp.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It will be understood that, as used herein, the terms "left side," "right side," "left front," "left rear," "right front," "right rear," and the like may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. Also, the above terms may be used to describe one element or feature's relationship to another element or feature shown in the figures. It will be understood that different orientations of the device in use or operation are contemplated in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements or features described as "right" or "right front" or "right back" would then be oriented "left," "left front," or "left back" of the other elements or features. Thus, the exemplary term "left" may include both left and right orientations. In addition, the device may also include additional orientations (e.g., rotated 90 degrees or other orientations) and the spatial descriptors used herein interpreted accordingly.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or be connected to the other element through intervening elements. Further, "connection" in the following embodiments is understood to mean "electrical connection", "communication connection", or the like, if there is a transfer of electrical signals or data between the connected objects.
As used herein, the singular forms "a", "an" and "the" may include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises/comprising," "includes" or "including," etc., specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof. Also, as used in this specification, the term "and/or" includes any and all combinations of the associated listed items.
In one embodiment, as shown in fig. 1, there is provided a running water turn signal lamp fault diagnosis system including:
the running water turn light module comprises a left turn light module and a right turn light module which are connected in parallel; the left turn signal lamp module continuously outputs a left feedback signal under the condition of working state; the right turn light module continuously outputs a right feedback signal under the condition of working state;
and the automobile body controller is connected with the left steering lamp module and the right steering lamp module which are connected in parallel and used for receiving the left feedback signal or the right feedback signal, detecting whether the left feedback signal or the right feedback signal is subjected to level turnover in a preset time period of each power supply cycle, and obtaining a fault diagnosis result according to the detection result.
Specifically, the running water turn signal lamp module is a turn signal lamp module with running water effect, and can be applied to various types of motor vehicles and non-motor vehicles, such as passenger cars, trucks, motorcycles, electric vehicles and the like. The running water turn light module comprises a left turn light module and a right turn light module which are arranged on the vehicle body, and the left turn light module and the right turn light module are respectively arranged on two opposite sides. And the left turn light module and the right turn light module are connected in parallel and then are connected with the vehicle body controller. Therefore, the automobile body controller can be connected with the running water steering lamp module through fewer hardware resources, and PIN resources of the automobile body controller are saved.
Further, the left turn light module and the right turn light module may each include one or more sets of turn lights, and each set of turn lights may include a plurality of light emitting elements. The light emitting element may be any type of light emitting device in the prior art, and in one example, the light emitting element is an LED.
When the turn light module (including the left turn light module and the right turn light module) is in a working state, the turn light module emits light according to a preset light emitting mode, for example, the turn light module flashes in a mode of alternately changing from on to off to on or in a mode of high brightness, low brightness and high brightness, so as to show the turning direction of the vehicle. The power supply period is a time interval determined according to a change pattern of the light emitting manner, and further, may be a light emitting period of the turn signal module, that is, a duration time for the turn signal module to complete one time of periodic light emission. For example, when the turn signal module operates in an on-off-on lighting manner, the power supply period may be the sum of the lighting duration and the off duration in a variation period, please refer to fig. 2, the turn signal module lights in a variation mode of 400 ms on-400 ms off-400 ms on-400 ms off, the power supply period may be 800 ms, and the turn signal module completes the lighting of 400 ms on-400 ms off for the first time in the power supply period 1, and completes the lighting of 400 ms on-400 ms off for the second time in the power supply period 2.
The left turn signal module continuously outputs the left feedback signal under the condition that the left turn signal module is in the working state, namely, the left turn signal module continuously sends the left feedback signal to the vehicle body controller in the period from the working state to the working state. For example, the left turn lamp module enters the operating state at time a1 and exits the operating state at time a2, the left turn lamp module may output the left feedback signal without interruption during the period from time a1 to time a 2. The left feedback signal may be a signal output by a fault feedback line of the left turn signal lamp module, and is used to reflect a lighting state of the left turn signal lamp module. For example, the left feedback signal is low when the left turn signal module is lit or high, and is high when the left turn signal module is off or low.
Similar to the left turn signal module, the right turn signal module uninterruptedly outputs a right feedback signal under the condition that the right turn signal module is in the working state, and the right feedback signal may be a signal output by a fault feedback line of the right turn signal module and is used for reflecting the light emitting state of the right turn signal module.
The left turn light module and the right turn light module can be selected to enter a working state, and the states of the left turn light module and the right turn light module can include the following three conditions in the same moment: (1) the left turn light module is in a working state, and the right turn light module is in a non-working state; (2) the left turn light module is in an inoperative state, and the right turn light module is in an operative state; (3) the left turn light module is in an inoperative state, and the right turn light module is in an inoperative state. Therefore, when the left turn light module is in the working state, the right turn light module is not powered and is in the non-working state, and the fault feedback line of the right turn light module is in the suspended state, so that the influence of the right turn light module on the diagnosis of the left turn light module can be avoided. Similarly, when the right turn light module is in a working state, because the left turn light module is not powered, the fault feedback line is in a suspended state, so that the influence of the left turn light module on the diagnosis of the right turn light module can be avoided, and the time-sharing diagnosis can be realized and the accuracy of the diagnosis can be improved.
The vehicle body controller is used for receiving feedback signals output by the turn light modules, and the feedback signals comprise a left feedback signal output by the left turn light module and a right feedback signal output by the right turn light module. When the vehicle body controller receives the feedback signal, the received left feedback signal or right feedback signal is detected to determine whether the level of the left feedback signal or the right feedback signal is reversed within a preset time period of each power supply cycle. The form and the occurrence frequency of the level inversion can be determined according to the light emitting manner, and the level inversion includes, but is not limited to, high level inversion to low level, and may also be low level inversion to high level.
The preset time period may be determined according to a brightness change time of the turn signal module, and in the above-described lighting manner, the preset time period may be determined according to a time from lighting to turning off, or a time from low brightness to high brightness. Further, the duration of the preset time period may be obtained according to actual conditions, for example, based on the signal transmission time period, the feedback time period of the fault feedback line, and other factors, which is not specifically limited in the present application. In one example, referring to fig. 2, in the lighting manner shown in fig. 2, if the turn signal lamp module is turned off from lighting at 400 ms, the preset time period may be 400 ms of each power supply cycle, or 350 ms to 410 ms of each power supply cycle, or 390 ms to 450 ms of each power supply cycle, etc.
Further, the vehicle body controller may divide the left side feedback signal or the right side feedback signal into one or more sub-signals according to the power supply period, and each sub-signal corresponds to each power supply period one to one, that is, the sub-signal is a signal level of the left side feedback signal or the right side feedback signal in the corresponding power supply period. And the automobile body controller detects whether the level of each divided sub-signal is reversed or not, and obtains a fault diagnosis result according to the detection result. Or the automobile body controller can determine the level detection time according to the preset time interval of each power supply cycle, detect when the level detection time is up, and generate a fault diagnosis result according to the detection result. And the fault diagnosis result is used for indicating whether the running water turn light has a fault or not.
In the running water turn light fault diagnosis system, the left turn light module and the right turn light module are connected in parallel, the left turn light module and the right turn light module after being connected in parallel are connected with the vehicle body controller, the vehicle body controller can receive a left feedback signal output by the left turn light module in a working state or a right feedback signal output by the right turn light module in the working state and detect the received feedback signals to confirm whether the feedback signals are subjected to level inversion in a preset time period of each power supply period and obtain a fault diagnosis result according to the detection result, so that hardware resources of the vehicle body controller can be saved, time-sharing diagnosis is performed on the left turn light module and the right turn light module, and the fault diagnosis accuracy is improved.
In one embodiment, the vehicle body controller is used for confirming that the corresponding turn light module is in a normal state under the condition that the occurrence of level inversion is detected; and under the condition that the level inversion is not detected, confirming that the corresponding turn light module is in a fault state.
Specifically, if the vehicle body controller detects that the left feedback signal is subjected to level reversal in a preset time period of each power supply cycle, the vehicle body controller confirms that the left turn signal lamp module is in a normal state and does not have a fault; and if the left side feedback signal is detected not to have level inversion in the preset time period of any power supply cycle, determining that the left side steering lamp module is in a fault state, wherein at the moment, the left side steering lamp module may have element faults or line faults.
Similarly, if the vehicle body controller detects that the level of the right feedback signal is turned over in the preset time period of each power supply cycle, the right turn light module is determined to be in a normal state. And if the fact that the level of the right feedback signal is not turned over in the preset time period of any power supply cycle is detected, determining that the right turn light module is in a fault state, wherein at the moment, the right turn light module may have element faults or line faults.
Further, the vehicle body controller may confirm that the corresponding turn signal module is in a normal state when it is detected that the rollover from the low level to the high level occurs and there is no rollover from the high level to the low level. Taking the detection of the left feedback signal as an example, referring to fig. 3, when the vehicle body controller detects that the left feedback signal is inverted from the low level to the high level in the preset time period of each power supply cycle, and there is no level inversion in other forms, it is determined that the left turn signal module is in the normal state and no fault occurs. When the vehicle body controller detects that the left feedback signal only has level turnover from a high level to a low level in a preset time period of any power supply cycle, the vehicle body controller confirms that the left turn signal lamp module is in a fault state; or when the left side feedback signal is detected to simultaneously turn from the low level to the high level in the preset time period of any one power supply cycle and the level turning from the high level to the low level, the left side turn light module is confirmed to be in the fault state. The detection of the right feedback signal is the same as the detection of the left feedback signal, and is not described again.
In the water lamp fault diagnosis system, the left turn lamp module and the right turn lamp module can be diagnosed in a time-sharing manner, so that the fault diagnosis accuracy is improved.
In one embodiment, the vehicle body controller is used for sending a driving signal to the corresponding steering lamp module when receiving a steering lamp turn-on instruction; the driving signal is a signal with level reversal in each power supply period;
the left turn light module is used for entering a working state under the condition of receiving the driving signal and outputting a left feedback signal according to the driving signal; and the right turn light module is used for entering a working state under the condition of receiving the driving signal and outputting a right feedback signal according to the driving signal.
Specifically, the vehicle body controller sends a driving signal to the left turn light module when receiving a left turn light turn-on instruction, sends a driving signal to the right turn light module when receiving a right turn light turn-on instruction, and stops sending the driving signal after receiving a turn light turn-off instruction. The driving signal is used for driving the corresponding steering lamp module to work according to a preset light-emitting mode. The left steering lamp module or the right steering lamp module enters a working state when receiving the driving signal and correspondingly outputs a left feedback signal or a right feedback signal.
In one embodiment, the left turn light module includes a left front turn light unit and a left rear turn light unit; the right turn light module comprises a right front turn light unit and a right rear turn light unit; the vehicle body controller is connected with the left front steering lamp unit and the right front steering lamp unit which are connected in parallel; the fault diagnosis line of the left rear steering lamp unit is connected in parallel with the fault diagnosis line of the right rear steering lamp unit, and the vehicle body controller is connected with the left rear steering lamp unit and the right rear steering lamp unit which are connected in parallel. Therefore, the feedback lines of the lamp group modules which are symmetrical left and right are used for doubling, so that time-sharing diagnosis can be realized, and hardware resources of a vehicle body controller of a whole vehicle wiring harness are saved.
In one embodiment, as shown in fig. 4, the left rear turn lamp unit includes a left rear fixed side turn lamp and a left rear moving side turn lamp; the right rear turn lamp unit comprises a right rear fixed side turn lamp and a right rear movable side turn lamp; the left rear fixed side steering lamp and the right rear fixed side steering lamp are connected in parallel and are connected with the vehicle body controller; the left rear moving side steering lamp and the right rear moving side steering lamp are connected in parallel and are connected with the vehicle body controller. The movable side steering lamp can be a lamp which is assembled on a back door of the vehicle and can move along with the back door; the fixed side turn signal lamp may be a lamp that is mounted on a white vehicle and cannot move relative to the vehicle. Therefore, time-sharing diagnosis can be realized, and hardware resources of the vehicle body controller of the whole vehicle wiring harness are saved.
Further, if the drive signal is drive-outputted in such a manner that it is turned on for 400 milliseconds and turned off for 400 milliseconds, that is, the drive signal is at a high level for 0 to 400 milliseconds and at a low level for 400 to 800 milliseconds of the power supply period, the left rear fixed side turn light and the left rear moving side turn light may be continuously turned on for 200 milliseconds after running water is turned on for 200 milliseconds, and then turned off for 400 milliseconds continuously.
In one embodiment, a vehicle is provided that includes the above-described running water turn signal lamp fault diagnosis system. Further, the vehicle of the present application may be an automotive vehicle or a non-automotive vehicle, including but not limited to a sedan, a bus, a truck, a tractor, a special purpose vehicle, a motorcycle, an electric vehicle, and the like.
In one embodiment, as shown in fig. 5, a method for diagnosing a fault of a flow water steering lamp is provided, which is described by taking an automobile body controller applied in the flow water steering lamp fault diagnosis system as an example, and includes the following steps:
and 520, detecting whether the level of the left feedback signal or the right feedback signal is reversed in a preset time period of each power supply cycle, and obtaining a fault diagnosis result according to the detection result.
Specifically, the vehicle body controller may receive a left feedback signal output in a case where the left turn lamp module is in an operating state, and a right feedback signal output in a case where the right turn lamp module is in an operating state. And when the vehicle body controller receives the feedback signal, detecting the received left feedback signal or right feedback signal to determine whether the left feedback signal or right feedback signal is subjected to level inversion within a preset time period of each power supply cycle, and obtaining a fault diagnosis result according to a detection result. The steps executed by the vehicle body controller can refer to the above embodiments, and are not described herein again.
In the method for diagnosing the fault of the running water steering lamp, a left feedback signal or a right feedback signal is received; the left feedback signal is a signal continuously output by the left turn signal lamp module under the condition of working state; the right feedback signal is a signal continuously output by the right turn light module under the condition of working state; whether level overturning occurs to the left feedback signal or the right feedback signal within a preset time period of each power supply cycle is detected, and a fault diagnosis result is obtained according to the detection result, so that time-sharing diagnosis can be performed on the left steering lamp module and the right steering lamp module, and the accuracy of fault diagnosis is improved.
In one embodiment, the step of obtaining the fault diagnosis result according to the detected result includes:
confirming that the corresponding turn light module is in a normal state under the condition of detecting that level overturning occurs;
and under the condition that the level inversion is not detected, confirming that the corresponding turn light module is in a fault state.
Specifically, taking the left feedback signal as an example, if the vehicle body controller detects that the left feedback signal is subjected to level inversion within a preset time period of each power supply cycle, it is determined that the left turn signal module is in a normal state and has no fault; if it is detected that the level of the left feedback signal is not inverted in a preset period of any power supply cycle, for example, the left feedback signal is continuously at a high level or continuously at a low level in a preset period of any power supply cycle, it is determined that the left turn signal module is in a fault state, and at this time, there may be an element fault or a line fault in the left turn signal module. The process of detecting the right feedback signal by the automobile body controller is the same as the process of detecting the left feedback signal. Therefore, the time-sharing diagnosis can be performed on the left steering lamp module and the right steering lamp module, and the accuracy of fault diagnosis is improved.
In one embodiment, the running water turn signal lamp fault diagnosis method further includes:
under the condition of receiving a turn-on instruction of a turn light, sending a driving signal to a corresponding turn light module; the driving signal is a signal with level reversal in each power supply period; the driving signal is used for indicating the corresponding steering lamp module to enter a working state and outputting a corresponding feedback signal.
In one embodiment, the drive signal is high for 0 to 400 milliseconds of the power cycle and low for 400 to 800 milliseconds of the power cycle;
the step of detecting whether the level of the left feedback signal or the right feedback signal is reversed in the preset time interval of each power supply cycle comprises the following steps:
it is detected whether the left side feedback signal or the right side feedback signal is flipped from the low level to the high level within 300 msec to 500 msec of each power supply period.
Specifically, referring to fig. 6, fig. 6A shows a driving signal of the vehicle body controller, fig. 6B shows a feedback signal (which may be a left side feedback signal or a right side feedback signal) corresponding to the driving signal, and fig. 6C shows an actual output signal of the turn signal module. The duration of one power supply period can be 800 milliseconds, the driving signal is a square wave signal with a duty ratio of 50%, the turn light module can be continuously lighted for 200 milliseconds after being lighted for 200 milliseconds at a running water speed, and then is continuously extinguished for 400 milliseconds, and the steps are repeated. The preset time interval is 300 milliseconds to 500 milliseconds of each power supply cycle, so that the influence caused by signal transmission delay can be avoided, and the diagnosis is carried out after the running of the turn light module is finished, so that the problem of false diagnosis in the running period can be effectively solved, and the diagnosis accuracy is improved.
As shown in fig. 6, when the vehicle body controller detects the feedback signals of the power supply cycle 1, the power supply cycle 2 and the power supply cycle 3, the feedback signal is switched from the low level to the high level between 300 milliseconds and 500 milliseconds in the above 3 power supply cycles, and both the feedback signal is switched from the low level for 100 milliseconds to the high level for 100 milliseconds, so that it can be confirmed that the corresponding turn signal module is in the normal state. When the power supply period 4 is detected, the feedback signals are all high level in the 300 th millisecond to the 500 th millisecond of the power supply period 4, the automobile body controller does not detect level overturning, and the corresponding turn light module is confirmed to be in a fault state.
Further, if the feedback signal is at a low level in any power supply period from 300 ms to 500 ms, the vehicle body controller may preliminarily determine that the voltage of the feedback signal output by the fault feedback line is too low, and then perform flash early warning. If the feedback signal is at high level in the range from 300 milliseconds to 500 milliseconds of any power supply period, the vehicle body controller can preliminarily confirm that the voltage of the feedback signal output by the fault feedback line is too high, and then the vehicle body controller carries out flash early warning. The method reports the fault and turns off within the time of 200 milliseconds +50 milliseconds +20 milliseconds at the latest after the steering lamp is abnormal and the 200 milliseconds are finished.
It should be understood that although the various steps in the flowcharts of fig. 5-6 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 5-6 may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, which are not necessarily performed in sequence, but may be performed in turn or alternately with other steps or at least some of the other steps.
In one embodiment, as shown in fig. 7, there is provided a running water turn lamp fault diagnosis apparatus including:
the feedback signal receiving module is used for receiving a left feedback signal or a right feedback signal; the left feedback signal is a signal continuously output by the left turn signal lamp module under the condition of working state; the right feedback signal is a signal continuously output by the right turn light module under the condition of working state;
and the fault diagnosis result acquisition module is used for detecting whether the left feedback signal or the right feedback signal is subjected to level inversion within a preset time period of each power supply cycle, and acquiring a fault diagnosis result according to the detection result.
In one embodiment, the fault diagnosis result obtaining module includes: the normal state confirming unit is used for confirming that the corresponding steering lamp module is in a normal state under the condition that the level overturn is detected; and the fault state confirmation unit is used for confirming that the corresponding turn light module is in a fault state under the condition that the level inversion is not detected.
In one embodiment, the apparatus further comprises: the driving module is used for sending a driving signal to the corresponding steering lamp module under the condition of receiving a steering lamp turn-on instruction; the driving signal is a signal with level reversal in each power supply period; the driving signal is used for indicating the corresponding steering lamp module to enter a working state and outputting a corresponding feedback signal.
In one embodiment, the drive signal is high for 0 to 400 milliseconds of the power cycle and low for 400 to 800 milliseconds of the power cycle; the fault diagnosis result acquisition module comprises: and the detection unit is used for detecting whether the left side feedback signal or the right side feedback signal is overturned from the low level to the high level within 300 milliseconds to 500 milliseconds of each power supply period.
For specific limitations of the device for diagnosing fault of the flow water steering lamp, reference may be made to the above limitations of the method for diagnosing fault of the flow water steering lamp, which are not described herein again. All or part of each module in the running water turn lamp fault diagnosis device can be realized by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, there is provided a vehicle body controller, which when executing a computer program, performs the steps of:
receiving a left feedback signal or a right feedback signal; the left feedback signal is a signal continuously output by the left turn signal lamp module under the condition of working state; the right feedback signal is a signal continuously output by the right turn light module under the condition of working state;
and detecting whether the level of the left feedback signal or the right feedback signal is reversed within a preset time period of each power supply cycle, and obtaining a fault diagnosis result according to the detection result.
In one embodiment, the body controller when executing the computer program further performs the steps of: confirming that the corresponding turn light module is in a normal state under the condition of detecting that level overturning occurs; and under the condition that the level inversion is not detected, confirming that the corresponding turn light module is in a fault state.
In one embodiment, the body controller when executing the computer program further performs the steps of: under the condition of receiving a turn-on instruction of a turn light, sending a driving signal to a corresponding turn light module; the driving signal is a signal with level reversal in each power supply period; the driving signal is used for indicating the corresponding steering lamp module to enter a working state and outputting a corresponding feedback signal.
In one embodiment, the drive signal is high for 0 to 400 milliseconds of the power cycle and low for 400 to 800 milliseconds of the power cycle; when the vehicle body controller executes the computer program, the following steps are also realized: it is detected whether the left side feedback signal or the right side feedback signal is flipped from the low level to the high level within 300 msec to 500 msec of each power supply period.
In one embodiment, a computer-readable storage medium is provided, having a computer program stored thereon, which when executed by a processor, performs the steps of:
receiving a left feedback signal or a right feedback signal; the left feedback signal is a signal continuously output by the left turn signal lamp module under the condition of working state; the right feedback signal is a signal continuously output by the right turn light module under the condition of working state;
and detecting whether the level of the left feedback signal or the right feedback signal is reversed within a preset time period of each power supply cycle, and obtaining a fault diagnosis result according to the detection result.
In one embodiment, the computer program when executed by the processor further performs the steps of: confirming that the corresponding turn light module is in a normal state under the condition of detecting that level overturning occurs; and under the condition that the level inversion is not detected, confirming that the corresponding turn light module is in a fault state.
In one embodiment, the computer program when executed by the processor further performs the steps of: under the condition of receiving a turn-on instruction of a turn light, sending a driving signal to a corresponding turn light module; the driving signal is a signal with level reversal in each power supply period; the driving signal is used for indicating the corresponding steering lamp module to enter a working state and outputting a corresponding feedback signal.
In one embodiment, the drive signal is high for 0 to 400 milliseconds of the power cycle and low for 400 to 800 milliseconds of the power cycle; the computer program when executed by the processor further realizes the steps of: it is detected whether the left side feedback signal or the right side feedback signal is flipped from the low level to the high level within 300 msec to 500 msec of each power supply period.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database or other medium used in the embodiments provided herein can include at least one of non-volatile and volatile memory. Non-volatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical storage, or the like. Volatile Memory can include Random Access Memory (RAM) or external cache Memory. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others.
In the description herein, references to the description of "some embodiments," "other embodiments," "desired embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, a schematic description of the above terminology may not necessarily refer to the same embodiment or example.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (13)
1. A running water turn signal fault diagnostic system, comprising:
the running water turn light module comprises a left turn light module and a right turn light module which are connected in parallel; the left turn signal lamp module continuously outputs a left feedback signal under the condition of working state; the right turn light module continuously outputs a right feedback signal under the condition of being in the working state;
and the automobile body controller is connected with the left steering lamp module and the right steering lamp module which are connected in parallel and is used for receiving the left feedback signal or the right feedback signal, detecting whether the left feedback signal or the right feedback signal is subjected to level inversion within a preset time period of each power supply cycle, and obtaining a fault diagnosis result according to the detection result.
2. The running water turn signal lamp fault diagnosis system according to claim 1, wherein the vehicle body controller is configured to confirm that the corresponding turn signal lamp module is in a normal state if the occurrence of level inversion is detected; and under the condition that the level inversion is not detected, confirming that the corresponding turn light module is in a fault state.
3. The running water turn-signal lamp fault diagnosis system according to claim 1, wherein the vehicle body controller is configured to send a driving signal to the corresponding turn-signal lamp module upon receiving a turn-signal lamp turn-on instruction; the driving signal is a signal with level reversal in each power supply period;
the left turn signal lamp module is used for entering the working state under the condition of receiving the driving signal and outputting the left feedback signal according to the driving signal; and the right turn light module is used for entering the working state under the condition of receiving the driving signal and outputting the right feedback signal according to the driving signal.
4. The running water turn signal lamp fault diagnosis system according to any one of claims 1 to 3, wherein the left turn signal lamp module includes a left front turn signal lamp unit and a left rear turn signal lamp unit; the right turn light module comprises a right front turn light unit and a right rear turn light unit;
the left front steering lamp unit and the right front steering lamp unit are connected in parallel and connected with the vehicle body controller; the left rear turn light unit and the right rear turn light unit are connected in parallel and are connected with the vehicle body controller.
5. The running water turn signal lamp fault diagnosis system according to claim 4, wherein the left rear turn signal lamp unit includes a left rear fixed side turn signal lamp and a left rear movable side turn signal lamp; the right rear turn lamp unit comprises a right rear fixed side turn lamp and a right rear movable side turn lamp;
the left rear fixed side steering lamp and the right rear fixed side steering lamp are connected in parallel and are connected with the vehicle body controller; the left rear moving side steering lamp and the right rear moving side steering lamp are connected in parallel and are connected with the vehicle body controller.
6. A vehicle characterized by comprising the running water turn signal lamp fault diagnosis system according to any one of claims 1 to 5.
7. A method of diagnosing a malfunction of a flow water steering lamp, the method comprising:
receiving a left feedback signal or a right feedback signal; the left feedback signal is a signal which is continuously output by the left turn signal lamp module under the condition that the left turn signal lamp module is in a working state; the right feedback signal is a signal continuously output by the right turn light module under the condition of working state;
and detecting whether the level of the left feedback signal or the right feedback signal is reversed within a preset time period of each power supply cycle, and obtaining a fault diagnosis result according to the detection result.
8. The method for diagnosing a malfunction of a flow water steering lamp according to claim 7, wherein the step of obtaining a malfunction diagnosis result based on the result of the detection includes:
confirming that the corresponding turn light module is in a normal state under the condition of detecting that level overturning occurs;
and under the condition that the level inversion is not detected, confirming that the corresponding turn light module is in a fault state.
9. The method of claim 7, further comprising:
under the condition of receiving a turn-on instruction of a turn light, sending a driving signal to a corresponding turn light module; the driving signal is a signal with level reversal in each power supply period; the driving signal is used for indicating the corresponding steering lamp module to enter the working state and outputting a corresponding feedback signal.
10. The running water turn lamp fault diagnosis method according to claim 9, wherein the driving signal is at a high level for 0 to 400 msec of the power supply period and at a low level for 400 msec to 800 msec of the power supply period;
the step of detecting whether the level of the left feedback signal or the right feedback signal is reversed in a preset time interval of each power supply cycle includes:
detecting whether the left side feedback signal or the right side feedback signal is flipped from a low level to a high level within 300 milliseconds to 500 milliseconds of each of the power supply periods.
11. A running water turn signal lamp fault diagnosis device, comprising:
the feedback signal receiving module is used for receiving a left feedback signal or a right feedback signal; the left feedback signal is a signal which is continuously output by the left turn signal lamp module under the condition that the left turn signal lamp module is in a working state; the right feedback signal is a signal continuously output by the right turn light module under the condition of working state;
and the fault diagnosis result acquisition module is used for detecting whether the level of the left feedback signal or the right feedback signal is reversed in a preset time period of each power supply cycle or not and obtaining a fault diagnosis result according to the detection result.
12. A vehicle body controller, characterized in that the vehicle body controller, when executing a computer program, implements the steps of the method of any one of claims 7 to 10.
13. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 7 to 10.
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