CN114489015A - Fault diagnosis system and method based on vehicle-mounted controller system - Google Patents
Fault diagnosis system and method based on vehicle-mounted controller system Download PDFInfo
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- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0208—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the configuration of the monitoring system
- G05B23/0213—Modular or universal configuration of the monitoring system, e.g. monitoring system having modules that may be combined to build monitoring program; monitoring system that can be applied to legacy systems; adaptable monitoring system; using different communication protocols
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- G—PHYSICS
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- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
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- G05B2219/24065—Real time diagnostics
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Abstract
The application discloses fault diagnosis system and method based on-vehicle controller system relates to the electrical technical field of car, and fault diagnosis system includes: at least two different signal generators configured to sequentially emit different signals according to a set timing, and when one signal generator emits a signal, the other signal generators stop emitting signals; the controller system is provided with at least two different signal paths, the input ends of all the signal paths are respectively connected with a signal generator, and a plurality of monitoring points are distributed on the signal paths; the signal collector is configured to collect signals of all monitoring points once if the signal generator sends out signals; and the processor is configured to determine an abnormal monitoring point according to the collected signals of all the monitoring points after all the signal generators send out the signals, and diagnose the fault according to the abnormal monitoring point. The method and the device can rapidly check the faults in the complex controller system, do not need to perform fault reappearance experiments, and have a simple checking mode and a short period.
Description
Technical Field
The application relates to the technical field of automobile electrical, in particular to a fault diagnosis system and method based on an on-board controller system.
Background
The automobile industry is developed vigorously, and particularly the development of the automobile electronic technology is remarkable. Typically, the number of controller systems mounted on a vehicle body is increased, and the matching problem of the controller systems and some electronic devices (such as relays, lamps and the like) is more and more prominent, and accordingly, more fault risks are brought about. In complicated faults, the hiding performance of fault reasons is higher, and the troubleshooting difficulty is increased greatly.
In the related art, troubleshooting is mostly to judge fault points which may cause faults according to fault phenomena, and then to troubleshoot a plurality of suspicious fault points one by one. And after the troubleshooting is delayed one by one, the real fault cannot be found. Then, the real fault condition cannot be checked, and a test for verifying fault reproduction by the system is also required, so that the fault checking period is also prolonged.
Based on this, how to quickly find out the fault point is one of the core targets of our development.
Disclosure of Invention
The embodiment of the application provides a fault diagnosis system and method based on a vehicle-mounted controller system, and aims to solve the technical problem of troubleshooting delay of the vehicle-mounted controller system in the related technology.
In a first aspect, an embodiment of the present application provides a fault diagnosis system based on an on-vehicle controller system, including:
at least two different signal generators configured to sequentially emit different signals according to a set timing, and when one signal generator emits a signal, the other signal generators stop emitting signals;
the controller system is provided with at least two different signal paths, the input ends of all the signal paths are respectively connected with one signal generator, and a plurality of monitoring points are distributed on the signal paths;
the signal collector is configured to collect signals of all monitoring points once if the signal generator sends out signals;
and the processor is configured to determine an abnormal monitoring point according to the collected signals of all the monitoring points and diagnose the fault according to the abnormal monitoring point after all the signal generators send the signals.
In this embodiment, first, the signal generator a sends out a signal, the signal generator b does not send out a signal, and the signals of all monitoring points are collected; then, the signal generator a is switched to not send out signals, the signal generator b sends out signals, and signals of all monitoring points are collected again; and comparing the difference between all the actually acquired signals and the set expected signals according to all the signals acquired twice to determine an abnormal monitoring point and diagnosing faults according to the abnormal monitoring point, so that the omnibearing troubleshooting of hardware and software of the controller system can be completed.
In some embodiments, the number of the monitoring points of the signal path at the hardware part of the controller system is three, the first monitoring point is arranged at the input end of the controller system, the second monitoring point is arranged at the internal data acquisition end of the controller system, and the third monitoring point is arranged at the MCU input end of the controller system.
In some embodiments, if the monitoring points are located in a hardware part of a controller system, level signals of two adjacent monitoring points are different. If a low level signal should theoretically be acquired at the second monitoring point, the signals theoretically acquired at the first monitoring point and the third monitoring point are high level signals, and vice versa. Level inversion after triggering is set at adjacent monitoring points, and whether the monitoring points are abnormal or not can be determined according to whether the level is inverted as required or not.
In some embodiments, if the signal generator sends a signal, the acquired signal corresponding to the first monitoring point is a low level signal, the signal of the second monitoring point is a high level signal, and the signal of the third monitoring point is a low level signal.
In some embodiments, one of the monitoring points of the signal path in the software portion of the controller system is provided, the fourth monitoring point is provided at the MCU output end of the controller system, and the fourth monitoring points of all the signal paths are in common.
In some embodiments, if the generator emits a signal, the signal collected at the fourth monitoring point is consistent with the signal expected to be output.
In this embodiment, if the collected signal of the fourth monitoring point is consistent with the expected output signal, and each signal monitored in the hardware portion of the controller system is also consistent with the expected output signal, the software and the hardware of the controller system are normal. And if all the signals monitored by the hardware part of the controller system also accord with the expectation, and the collected signal of the fourth monitoring point is inconsistent with the signal expected to be output, the software of the controller system is abnormal.
In some embodiments, the treatment appliance is configured to:
and after all the signal generators send signals, judging whether the acquired signals of the monitoring points are consistent with a set level signal or an expected signal, and if not, judging that the section from the monitoring points to the monitoring points at the upstream of the monitoring points is a fault section.
Generally speaking, the signals of the monitoring points have actual signals and expected theoretical signals, if the collected actual signals are not consistent with the expected theoretical signals, if the collected level signals are consistent with the expected level signals, and the collected signals of the fourth monitoring point are consistent with the expected output signals, the vehicle-mounted controller system is judged to be normal; if the collected level signals are consistent with the expected level signals and the collected signal of the fourth monitoring point is inconsistent with the expected output signal, judging that the system software part of the vehicle-mounted controller is abnormal; if the collected level signals are not consistent with the expected level signals, abnormal monitoring points, abnormal signal paths and abnormal fault sections can be found according to the monitoring points corresponding to the abnormal level signals, and abnormal conditions occur to the hardware part of the controller system.
In some embodiments, the number of signal paths provided with monitoring points is three.
In some embodiments, the signal generator comprises at least a high beam and low beam switch, a high beam and low beam changeover switch, and a passing light switch.
In a second aspect, an embodiment of the present application further provides a fault diagnosis method based on an on-board controller system, including the following steps:
providing the fault diagnosis method based on the vehicle-mounted controller system;
sequentially sending different signals according to a set time sequence, and collecting signals of each monitoring point;
and after all the signal generators send signals, determining an abnormal monitoring point according to the collected signals of all the monitoring points and diagnosing faults according to the abnormal monitoring point.
The beneficial effect that technical scheme that this application provided brought includes: faults in the complex controller system are rapidly checked without performing fault reappearance experiments, and the checking mode is simple and the period is short; when the existence of parasitic capacitance in a system circuit of the controller is considered, if the signal sent by the signal generator has the phenomenon of abnormal input and output (mainly represented as effective signal delay), the fault true cause can be quickly determined.
The embodiment of the application provides a fault diagnosis system based on a vehicle-mounted controller system, wherein a plurality of monitoring points are arranged on different signal paths of the controller system, and simultaneously, different signals are sequentially sent to corresponding signal paths by signal generators according to a set time sequence; after all the signal generators send signals, according to the collected signals of all the monitoring points, the abnormal monitoring points are determined, faults are diagnosed according to the abnormal monitoring points, faults can be rapidly checked out, the true reasons of the faults are determined, fault reappearance experiments are not needed, and the checking mode is simple and short in period.
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In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a main electrical block diagram of a fault diagnosis system based on an on-vehicle controller system according to an embodiment of the present application.
The implementation, functional features and advantages of the objectives of the present application will be further explained with reference to the accompanying drawings.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The flow diagrams depicted in the figures are merely illustrative and do not necessarily include all of the elements and operations/steps, nor do they necessarily have to be performed in the order depicted. For example, some operations/steps may be decomposed, combined or partially combined, so that the actual execution sequence may be changed according to the actual situation.
The embodiment of the application provides a fault diagnosis system based on a vehicle-mounted controller system, wherein a plurality of monitoring points are arranged on different signal paths of the controller system, and simultaneously, different signals are sequentially sent to corresponding signal paths by signal generators according to a set time sequence; after all the signal generators send signals, according to the collected signals of all the monitoring points, the abnormal monitoring points are determined, faults are diagnosed according to the abnormal monitoring points, faults can be rapidly checked out, the true reasons of the faults are determined, fault reappearance experiments are not needed, and the checking mode is simple and short in period.
Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
Referring to fig. 1, an embodiment of the present application provides a fault diagnosis system based on an on-board controller system, including:
at least two different signal generators configured to sequentially emit different signals according to a set timing, and when one signal generator emits a signal, the other signal generators stop emitting signals;
the controller system is provided with at least two different signal paths, the input ends of all the signal paths are respectively connected with one signal generator, and a plurality of monitoring points are distributed on the signal paths;
the signal collector is configured to collect signals of all monitoring points once if the signal generator sends out signals;
and the processor is configured to determine an abnormal monitoring point according to the collected signals of all the monitoring points after all the signal generators send out the signals, and diagnose the fault according to the abnormal monitoring point.
Two signal generators are assumed to be a signal generator a and a signal generator b; there are also two signal paths, the monitoring points on the signal path with the signal generator a are sequentially defined as a1, a2, a3 and the like according to the input sequence, and the monitoring points on the signal path with the signal generator b are sequentially defined as b1, b2, b3 and the like according to the input sequence; wherein, the signal generator a and the signal generator b are respectively connected with two input pins of the controller system.
The embodiment of the application provides a fault diagnosis system based on vehicle-mounted controller system, its theory of operation does:
firstly, the signal generator a sends out signals, the signal generator b does not send out signals, and signals of all monitoring points are collected;
then, the signal generator a is switched to not send out signals, the signal generator b sends out signals, and signals of all monitoring points are collected again;
and comparing the difference between all the actually acquired signals and the set expected signals according to all the signals acquired twice to determine an abnormal monitoring point and diagnosing faults according to the abnormal monitoring point, so that the omnibearing troubleshooting of hardware and software of the controller system can be completed.
In the embodiment of the application, signals of all monitoring points are collected once every time the signal generator is switched once, whether the signal change of the switching time difference is in accordance with expectations or not is utilized to determine where a fault occurs, the fault is simply and quickly found, meanwhile, the situation that parasitic capacitance exists in a system circuit of a controller is also considered, and even if the phenomenon that the input and the output of the signal sent by the signal generator are abnormal normally (mainly expressed as effective signal delay) occurs, the true cause of the fault can be quickly determined.
As a preferred scheme of the embodiment of the application, the number of the monitoring points of the signal path located on the hardware part of the controller system is three, the first monitoring point is arranged at the input end of the controller system, the second monitoring point is arranged at the internal data acquisition end of the controller system, and the third monitoring point is arranged at the MCU input end of the controller system.
In this embodiment, monitoring points are set at different nodes of the hardware part of the controller system, and a signal path is divided into a plurality of sections by the monitoring points, so that when a certain monitoring point is determined to be abnormal, the section between the abnormal monitoring point and the upstream monitoring point is a fault section.
Typically, the hardware part of the controller system includes two functional devices of signal acquisition and signal processing, taking the signal path connected with the signal generator a as an example, the monitoring point at the front end of the signal acquisition is a first monitoring point a1, the monitoring point between the signal acquisition and the signal processing is a second monitoring point a2, the monitoring point at the back end of the signal processing is a third monitoring point a3, and the third monitoring point a3 is also located at the input end of the software part of the controller system.
Further, if the monitoring points are located in a hardware part of a controller system, level signals of two adjacent monitoring points are different. That is, if a low level signal should be theoretically acquired at the second monitoring point, the signals theoretically acquired at the first monitoring point and the third monitoring point are high level signals, and vice versa. Level inversion after triggering is set at adjacent monitoring points, and whether the monitoring points are abnormal or not can be determined according to whether the level is inverted as required or not.
In the embodiment of the application, in the hardware part of the controller system, the expected signals meet the following requirements:
if the signal generator sends out signals, the collected signals corresponding to the first monitoring point are low-level signals, the signals corresponding to the second monitoring point are high-level signals, and the signals corresponding to the third monitoring point are low-level signals.
Meanwhile, if the signal generator does not send out signals, the collected signals corresponding to the first monitoring point are high-level signals, the signals corresponding to the second monitoring point are low-level signals, and the signals corresponding to the third monitoring point are high-level signals.
Furthermore, one monitoring point of the signal path is located at the software part of the controller system, a fourth monitoring point is located at the output end of the MCU of the controller system, and the fourth monitoring points of all the signal paths share the same point.
In this embodiment, a monitoring point is set at the MCU output end of the controller system software part, and the monitoring point is defined as a fourth monitoring point 4, wherein all signal paths are collected into one path through the MCU as the output end of the controller system, or the MCU output end.
In the embodiment of the application, in the software part of the controller system, the expected signals meet the following requirements:
and if the generator sends out a signal, the collected signal of the fourth monitoring point is consistent with the signal expected to be output.
In this embodiment, if the collected signal of the fourth monitoring point is consistent with the expected output signal, and each signal monitored in the hardware portion of the controller system is also consistent with the expected output signal, the software and the hardware of the controller system are normal. And if all the signals monitored by the hardware part of the controller system also accord with the expectation, and the collected signal of the fourth monitoring point is inconsistent with the signal expected to be output, the software of the controller system is abnormal.
As shown in table 1, which is a signal to input signal relationship expectation table for all monitoring points not seen by the controller system hardware and software.
Further, the treatment appliance is configured to:
and after all the signal generators send signals, judging whether the acquired signals of the monitoring points are consistent with set level signals or expected signals, and if not, judging that the section from the monitoring points to the monitoring points at the upstream of the monitoring points is a fault section.
Generally speaking, the signals of the monitoring points have actual signals and expected theoretical signals, if the collected actual signals are not consistent with the expected theoretical signals, if the collected level signals are consistent with the expected level signals, and the collected signals of the fourth monitoring point are consistent with the expected output signals, the vehicle-mounted controller system is judged to be normal; if the collected level signals are consistent with the expected level signals and the collected signal of the fourth monitoring point is inconsistent with the expected output signal, judging that the system software part of the vehicle-mounted controller is abnormal; if the collected level signals are not consistent with the expected level signals, abnormal monitoring points, abnormal signal paths and abnormal fault sections can be found according to the monitoring points corresponding to the abnormal level signals, and abnormal conditions occur to the hardware part of the controller system.
Preferably, the number of signal paths provided with monitoring points is three. Although two signal paths can also be used to switch the signal generators, in practice three are provided.
Specifically, the signal generator at least comprises a high beam and low beam switch, a high beam and low beam change-over switch and a passing light switch. Because three signal paths are commonly used, three signal generators are correspondingly arranged, and three switches, namely a high beam switch, a low beam switch and a passing light switch, which are commonly used are respectively used as one signal generator.
In one embodiment, the first monitoring point detects a high signal indicating that the switch is off and a low signal indicating that the switch is on. The set time sequence is that firstly, a high beam and low beam switch is switched on, a overtaking lamp switch is switched off, and high beam and low beam are switched off; then, the high beam and low beam switch is switched off, the overtaking lamp switch is switched on, and the high beam and the low beam are switched off; then, the high beam and low beam switch is switched off, the overtaking lamp switch is switched off, and the high beam and low beam are switched on.
Furthermore, the processor also stores all the acquired signals, the acquisition time and the acquisition position of each signal and the like so as to perform analysis processing after the signals, the acquisition time and the acquisition position are read; it is also possible to store the result of the analysis processing and transmit the result to a specified device.
The embodiment of the application also provides a fault diagnosis method based on the vehicle-mounted controller system, which comprises the following steps:
providing a fault diagnosis system based on an on-board controller system;
sequentially sending different signals according to a set time sequence, and collecting signals of each monitoring point;
and after all the signal generators send signals, determining an abnormal monitoring point according to the collected signals of all the monitoring points and diagnosing faults according to the abnormal monitoring point.
In the embodiment, analysis and judgment can be carried out only by collecting signals on monitoring points, the obtained diagnosis source is convenient, the diagnosis process is simple, faults in a complex controller system can be rapidly checked, a fault reappearance experiment is not needed, and the checking mode is simple and the period is short; when the existence of parasitic capacitance in a system circuit of the controller is considered, if the phenomenon that the input of a signal sent by the signal generator is normal and the output of the signal is abnormal occurs, the fault cause can be quickly determined.
As shown in fig. 1, in the present embodiment, the fault diagnosis system based on the vehicle-mounted controller system includes:
at least two different signal generators configured to sequentially emit different signals according to a set timing, and when one signal generator emits a signal, the other signal generators stop emitting signals;
the controller system is provided with at least two different signal paths, the input ends of all the signal paths are respectively connected with one signal generator, and a plurality of monitoring points are distributed on the signal paths;
the signal collector is configured to collect signals of all monitoring points once if the signal generator sends out signals;
and the processor is configured to determine an abnormal monitoring point according to the collected signals of all the monitoring points after all the signal generators send out the signals, and diagnose the fault according to the abnormal monitoring point.
Two signal generators are assumed to be a signal generator a and a signal generator b; there are also two signal paths, the monitoring points on the signal path with the signal generator a are sequentially defined as a1, a2, a3 and the like according to the input sequence, and the monitoring points on the signal path with the signal generator b are sequentially defined as b1, b2, b3 and the like according to the input sequence; wherein, the signal generator a and the signal generator b are respectively connected with two input pins of the controller system.
The embodiment of the application provides a fault diagnosis system based on vehicle-mounted controller system, its theory of operation does:
firstly, the signal generator a sends out signals, the signal generator b does not send out signals, and signals of all monitoring points are collected;
then, the signal generator a is switched to not send out signals, the signal generator b sends out signals, and signals of all monitoring points are collected again;
and comparing the difference between all the actually acquired signals and the set expected signals according to all the signals acquired twice to determine an abnormal monitoring point and diagnosing faults according to the abnormal monitoring point, so that the omnibearing troubleshooting of hardware and software of the controller system can be completed.
In the embodiment of the application, signals of all monitoring points are collected once every time the signal generator is switched once, whether the signal change of the switching time difference is in accordance with expectations or not is utilized to determine where a fault occurs, the fault is simply and quickly found, meanwhile, the situation that parasitic capacitance exists in a system circuit of a controller is also considered, and even if the phenomenon that the input and the output of the signal sent by the signal generator are abnormal normally (mainly expressed as effective signal delay) occurs, the true cause of the fault can be quickly determined.
As a preferred scheme of the embodiment of the application, the number of the monitoring points of the signal path located on the hardware part of the controller system is three, the first monitoring point is arranged at the input end of the controller system, the second monitoring point is arranged at the internal data acquisition end of the controller system, and the third monitoring point is arranged at the MCU input end of the controller system.
In this embodiment, monitoring points are set at different nodes of the hardware part of the controller system, and a signal path is divided into a plurality of sections by the monitoring points, so that when a certain monitoring point is determined to be abnormal, the section between the abnormal monitoring point and the upstream monitoring point is a fault section.
Typically, the hardware part of the controller system includes two functional devices of signal acquisition and signal processing, taking the signal path connected with the signal generator a as an example, the monitoring point at the front end of the signal acquisition is a first monitoring point a1, the monitoring point between the signal acquisition and the signal processing is a second monitoring point a2, the monitoring point at the back end of the signal processing is a third monitoring point a3, and the third monitoring point a3 is also located at the input end of the software part of the controller system.
Further, if the monitoring points are located in a hardware part of a controller system, level signals of two adjacent monitoring points are different. That is, if a low level signal should be theoretically acquired at the second monitoring point, the signals theoretically acquired at the first monitoring point and the third monitoring point are high level signals, and vice versa. Level inversion after triggering is set at adjacent monitoring points, and whether the monitoring points are abnormal or not can be determined according to whether the level is inverted as required or not.
In the embodiment of the application, in the hardware part of the controller system, the expected signals meet the following requirements:
if the signal generator sends out signals, the collected signals corresponding to the first monitoring point are low-level signals, the signals corresponding to the second monitoring point are high-level signals, and the signals corresponding to the third monitoring point are low-level signals.
Meanwhile, if the signal generator does not send out signals, the collected signals corresponding to the first monitoring point are high-level signals, the signals corresponding to the second monitoring point are low-level signals, and the signals corresponding to the third monitoring point are high-level signals.
Furthermore, one monitoring point of the signal path is located at the software part of the controller system, a fourth monitoring point is located at the output end of the MCU of the controller system, and the fourth monitoring points of all the signal paths share the same point.
In this embodiment, a monitoring point is set at the MCU output end of the controller system software part, and the monitoring point is defined as a fourth monitoring point 4, wherein all signal paths are collected into one path through the MCU as the output end of the controller system, or the MCU output end.
In the embodiment of the application, in the software part of the controller system, the expected signals meet the following requirements:
and if the generator sends out a signal, the collected signal of the fourth monitoring point is consistent with the signal expected to be output.
In this embodiment, if the collected signal of the fourth monitoring point is consistent with the expected output signal, and each signal monitored in the hardware portion of the controller system is also consistent with the expected output signal, the software and the hardware of the controller system are normal. And if all the signals monitored by the hardware part of the controller system also accord with the expectation, and the collected signal of the fourth monitoring point is inconsistent with the signal expected to be output, the software of the controller system is abnormal.
As shown in table 1, which is a signal to input signal relationship expectation table for all monitoring points not seen by the controller system hardware and software.
Further, the treatment appliance is configured to:
and after all the signal generators send signals, judging whether the acquired signals of the monitoring points are consistent with set level signals or expected signals, and if not, judging that the section from the monitoring points to the monitoring points at the upstream of the monitoring points is a fault section.
Generally speaking, the signals of the monitoring points have actual signals and expected theoretical signals, if the collected actual signals are not consistent with the expected theoretical signals, if the collected level signals are consistent with the expected level signals, and the collected signals of the fourth monitoring point are consistent with the expected output signals, the vehicle-mounted controller system is judged to be normal; if the collected level signals are consistent with the expected level signals and the collected signal of the fourth monitoring point is inconsistent with the expected output signal, judging that the system software part of the vehicle-mounted controller is abnormal; if the collected level signals are not consistent with the expected level signals, abnormal monitoring points, abnormal signal paths and abnormal fault sections can be found according to the monitoring points corresponding to the abnormal level signals, and abnormal conditions occur to the hardware part of the controller system.
Preferably, the number of signal paths provided with monitoring points is three. Although two signal paths can also be used to switch the signal generators, in practice three are provided.
Specifically, the signal generator at least comprises a high beam and low beam switch, a high beam and low beam change-over switch and a passing light switch. Because three signal paths are commonly used, three signal generators are correspondingly arranged, and three switches, namely a high beam switch, a low beam switch and a passing light switch, which are commonly used are respectively used as one signal generator.
In one embodiment, the first monitoring point detects a high signal indicating that the switch is off and a low signal indicating that the switch is on. The set time sequence is that firstly, a high beam and low beam switch is switched on, a overtaking lamp switch is switched off, and high beam and low beam are switched off; then, the high beam and low beam switch is switched off, the overtaking lamp switch is switched on, and the high beam and the low beam are switched off; then, the high beam and low beam switch is switched off, the overtaking lamp switch is switched off, and the high beam and low beam are switched on.
Furthermore, the processor also stores all the acquired signals, the acquisition time and the acquisition position of each signal and the like so as to analyze and process after the signals, the acquisition time and the acquisition position are read; it is also possible to store the result of the analysis processing and transmit the result to a specified device.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A fault diagnosis system based on an on-board controller system, comprising:
at least two different signal generators configured to sequentially emit different signals according to a set timing, and when one signal generator emits a signal, the other signal generators stop emitting signals;
the controller system is provided with at least two different signal paths, the input ends of all the signal paths are respectively connected with one signal generator, and a plurality of monitoring points are distributed on the signal paths;
the signal collector is configured to collect signals of all monitoring points once if the signal generator sends out signals;
and the processor is configured to determine an abnormal monitoring point according to the collected signals of all the monitoring points after all the signal generators send out the signals, and diagnose the fault according to the abnormal monitoring point.
2. The vehicle controller system-based fault diagnosis system of claim 1, wherein:
the signal path is located at three monitoring points of a hardware part of the controller system, a first monitoring point is arranged at the input end of the controller system, a second monitoring point is arranged at the internal data acquisition end of the controller system, and a third monitoring point is arranged at the MCU input end of the controller system.
3. The vehicle controller system-based fault diagnosis system according to claim 2, wherein:
and if the monitoring points are positioned on the hardware part of the controller system, the level signals of two adjacent monitoring points are different.
4. The vehicle controller system-based fault diagnosis system of claim 3, wherein:
if the signal generator sends out signals, the collected signals corresponding to the first monitoring point are low-level signals, the signals corresponding to the second monitoring point are high-level signals, and the signals corresponding to the third monitoring point are low-level signals.
5. The vehicle controller system-based fault diagnosis system of claim 2, wherein:
one monitoring point of the signal path is located at the software part of the controller system, a fourth monitoring point is arranged at the output end of the MCU of the controller system, and the fourth monitoring points of all the signal paths share the same point.
6. The vehicle controller system-based fault diagnosis system of claim 5, wherein:
and if the generator sends out a signal, the collected signal of the fourth monitoring point is consistent with the signal expected to be output.
7. The vehicle controller system-based fault diagnosis system of claim 1, wherein the processing means is configured to:
and after all the signal generators send signals, judging whether the acquired signals of the monitoring points are consistent with set level signals or expected signals, and if not, judging that the section from the monitoring points to the monitoring points at the upstream of the monitoring points is a fault section.
8. The vehicle controller system-based fault diagnosis system according to claim 1, wherein the number of signal paths provided with monitoring points is three.
9. The vehicle controller system based fault diagnosis system of claim 1, wherein said signal generator comprises at least a high beam switch, a low beam switch and a passing light switch.
10. A fault diagnosis method based on a vehicle-mounted controller system is characterized by comprising the following steps:
providing a fault diagnosis method based on an on-board controller system according to any one of claims 1 to 9;
sequentially sending different signals according to a set time sequence, and collecting signals of each monitoring point;
and after all the signal generators send signals, determining an abnormal monitoring point according to the collected signals of all the monitoring points and diagnosing faults according to the abnormal monitoring point.
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