CN113043969A - Vehicle function safety monitoring method and system - Google Patents
Vehicle function safety monitoring method and system Download PDFInfo
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- CN113043969A CN113043969A CN202110326644.XA CN202110326644A CN113043969A CN 113043969 A CN113043969 A CN 113043969A CN 202110326644 A CN202110326644 A CN 202110326644A CN 113043969 A CN113043969 A CN 113043969A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 63
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- 230000008569 process Effects 0.000 claims abstract description 14
- 230000006870 function Effects 0.000 claims description 39
- 238000012360 testing method Methods 0.000 claims description 31
- 238000004590 computer program Methods 0.000 claims description 9
- 238000002405 diagnostic procedure Methods 0.000 claims description 9
- 238000003672 processing method Methods 0.000 claims description 4
- 230000007246 mechanism Effects 0.000 description 10
- 239000010410 layer Substances 0.000 description 9
- 238000003745 diagnosis Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000737 periodic effect Effects 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000009897 systematic effect Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
- B60R16/0231—Circuits relating to the driving or the functioning of the vehicle
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Abstract
The embodiment of the invention provides a vehicle function safety monitoring method and a system, wherein the method specifically comprises the following steps: monitoring the running state of the vehicle function, and reporting a fault notification to a fault debouncing module when a fault occurs; the fault debouncing module confirms the fault type; the fault management module starts an overtime timer to track the processing flow of the fault and informs the corresponding application software layer to carry out fault preprocessing according to the corresponding information of the fault table; after the preprocessing is finished, the fault management module closes the overtime timer, and triggers the fault state notification module to notify a corresponding module of the fault processing, so as to perform a functional safety processing flow. The invention meets the requirements of real-time performance, independence and diversity in the functional safety fault management work through a unified fault management process.
Description
Technical Field
The invention relates to a vehicle function safety monitoring method and a system, in particular to the technical field of vehicle safety.
Background
With the rapid development of automotive electronics, the complexity of automotive electronic and electrical systems is increasing, and ensuring the safety and reliability of automotive electronic and electrical systems becomes a problem for all whole car factories and suppliers. The international standard organization formulates an ISO 26262 functional safety standard according to the requirements, and provides guidance for the development of the automobile electronic and electrical system from the aspects of processes, technologies and the like.
In the prior art, a functional safety monitoring system only implements processing under system abnormal conditions by means of fault diagnosis, system degradation and the like, and as shown in fig. 1 and fig. 2, it does not explain which monitoring framework the system implements management of corresponding fault diagnosis, configuration of system degradation policies and the like. The existing method for realizing functional safety is an E-Gas framework, which is a functional safety multi-stage monitoring scheme about an engine control system proposed by seven host factories such as Benz, BMW, Audi and the like, wherein the first layer is a functional layer and mainly realizes some control algorithm functions; the second layer is a function monitoring layer which mainly monitors the functions of the first layer, and the third layer is a system monitoring layer which mainly monitors the system level of the whole equipment and also needs to be responsible for responding to errors detected by monitoring of each level. However, how many errors are managed in the third layer of the framework is not described in particular detail, and with the fact that electronic control units on automobiles are more and more complicated, particularly automatic driving controllers, many errors and faults of the whole system can be monitored, and the monitoring is difficult due to complicated functions.
Disclosure of Invention
The purpose of the invention is as follows: one objective is to provide a vehicle functional safety monitoring method and system to solve the above problems in the prior art, and meet the requirements of real-time performance, independence and diversity in functional safety fault management work through a unified fault management process.
The technical scheme is as follows: in a first aspect, a method for monitoring vehicle functional safety is provided, which specifically includes the following steps:
constructing a vehicle function safety monitoring system: the method comprises the steps of constructing a fault management module, a state machine, a fault state notification module, a debouncing module, a functional safety processing module and a fault information table;
the vehicle function safety monitoring system carries out self-test when being electrified;
when the self-test result is normal, the fault management module starts a state machine;
otherwise, the fault state notification module feeds back self-test failure information to the debounce module;
the debouncing module confirms the fault type according to the self-test failure information and sends the fault type to a fault management module;
the fault management module inquires in the fault information table according to the received fault type, and checks the fault consistency according to the inquiry result, if the consistency check is passed, the fault management module informs the application software layer module to carry out fault preprocessing according to the storage information in the fault information table;
after the fault preprocessing is finished, triggering a fault state notification module by a fault management module to send a functional safety processing notification, wherein the safety processing notification is used for triggering a functional safety processing module; the functional safety processing module is used for processing the generated faults.
In some implementations of the first aspect, the self-test procedure is implemented by a self-test function; the self-testing function is used for carrying out one-time integrity and safety self-testing on modules in the whole vehicle function safety monitoring system in one-time automobile driving period.
In some implementation manners of the first aspect, when the fault is not confirmed within the corresponding time or event period, the fault reporting processing is cancelled.
In some implementations of the first aspect, the fault management module triggers the fault status notification module after the fault pre-processing is completed;
the fault state notification module notifies a corresponding application program to execute safety function operation; the corresponding application program is used for executing a program corresponding to the processing strategy; the processing policy is a fault processing method inquired in the fault information table according to the generated fault.
In some implementation manners of the first aspect, when the fault notification occurs, a flow of fault preprocessing is timed, and if a processing time configured in advance is exceeded, a processing method of the timeout fault is executed.
In some implementations of the first aspect, the fault information table is to store fault policy information; the fault strategy information comprises a fault identification number, fault preprocessing overtime time, a fault preprocessing application software layer notification module and fault debouncing strategy information.
In a second aspect, a vehicle functional safety monitoring system is provided, the system comprising:
the self-testing module is arranged for carrying out integrity and safety self-testing on the modules in the whole vehicle function safety monitoring system;
the diagnostic test triggering module is used for triggering a diagnostic test in the running process of the system;
the error monitoring module is arranged for monitoring the functional operation state of the automobile electronic and electrical system;
the fault reporting module is arranged to report a fault notification to the fault debouncing module when a fault occurs;
the fault debouncing module is arranged for receiving the fault notification, judging the fault type and sending the fault type to the fault management module;
the fault management module is set to receive the fault type, start a fault overtime timer and call a fault information table to inquire a fault processing strategy; the fault timeout timer is set to monitor a fault handling process;
a failure policy information storage module configured to store failure handling policy information;
the fault consistency checking module is used for checking the consistency of the fault table information;
a fault status notification module configured to notify the application software layer to perform a functional safety operation.
In a third aspect, a computer device is proposed, comprising a memory and a processor, the memory storing a computer program, characterized in that the processor implements the steps of the vehicle function safety monitoring method when executing the computer program.
In a fourth aspect, a computer-readable storage medium is proposed, on which a computer program is stored which, when being executed by a processor, carries out the steps of the vehicle functional safety monitoring method.
Has the advantages that: the invention provides a vehicle function safety monitoring method and a vehicle function safety monitoring system, which can realize uniform monitoring management on the safety fault problem generated by vehicle functions through a generalized processing flow.
On one hand, by adding an overtime mechanism, the interval of fault tolerance time is met, so that the requirement on real-time performance is met; on the other hand, the support of the safety strategy is realized through the calibration of the fault information table, and the diversified requirements are met.
The invention completes unified fault flow management and systematized process of monitoring the vehicle function fault by the trigger mechanisms of power on and power off, period, event and the like, and solves the problem of complicated fault monitoring caused by complicated vehicle electric control unit.
Drawings
Fig. 1 is a schematic diagram of a prior art framework.
Fig. 2 is a schematic diagram of a security mechanism in the prior art.
FIG. 3 is a schematic flow chart of a method according to an embodiment of the present invention.
FIG. 4 is a diagram of an application framework according to an embodiment of the present invention.
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.
The embodiment of the application provides a vehicle function safety monitoring method and system, and systematic and unified monitoring management is realized from a multi-layer monitoring angle by formulating a general safety monitoring framework.
In one embodiment, as shown in fig. 3, there is provided a vehicle functional safety monitoring method, including the steps of:
monitoring the running state of vehicle functions, and reporting a fault notification to a fault debouncing module when a fault occurs;
specifically, after the vehicle function safety monitoring system is powered on, in order to ensure the normal operation of the safety monitoring function, a self-testing function built in a self-testing module is called to perform one-time integrity and safety self-testing on the modules in the whole vehicle function safety monitoring system, and meanwhile, the correctness of a related safety mechanism in a diagnosis test triggering mechanism is verified through the self-testing function. The self-test occurs in one automobile running period, namely in the process from ignition running to flameout, and when the self-test fails and a fault is generated, relevant error information is fed back to the system. Regarding the triggering of the diagnostic test, in the design process, in order to achieve the whole functional safety goal, a plurality of diagnostic mechanisms are provided for systematic failure and hardware random failure, and the mechanisms can ensure that the failure probability of the whole system is less than a certain standard value. Therefore, during the operation of the system, the self-test function in the self-test module can trigger related diagnostic tests in a power-on, power-off, periodic or event type, and the whole diagnostic test trigger system is managed. Wherein, power-on and power-off indicate that the vehicle function safety monitoring system is powered on and powered off; periodic represents events that occur periodically; the event-type representation triggers for a certain function selected by the user.
When the self-test result after the system is powered on is normal, the fault management module starts a state machine to trigger the execution of the safety mechanism at regular time according to the related information in the fault information table. Wherein the execution of the security mechanism may also be triggered upon detection of a related event.
In the monitoring process of functional safety, when a system fails, the debounce module receives failure notification information through a calling interface. The fault notification may be a notification that the bottom layer calls an upper interface, or may be a notification that the upper application software layer obtains a relevant error state by a periodic query to execute a relevant safety operation.
And step two, the fault debouncing module confirms the fault type and carries out corresponding preprocessing.
Specifically, as shown in fig. 4, the fault debounce module receives the fault notification through the interface and confirms the type of the generated fault. After the fault type is confirmed, the fault management module starts an overtime timer to track the processing flow of the corresponding fault. In the process of fault processing, a fault management module inquires a corresponding fault debouncing mode based on time or event times according to a fault information table, simultaneously detects fault consistency, informs an application module in a corresponding application software layer to preprocess a fault when the result is consistent, and cancels the fault reporting processing if the fault is not confirmed in the corresponding time or event period.
The fault information table is a module for storing fault policy information, and the fault information includes, but is not limited to, a fault identification number, a fault preprocessing timeout time, a fault preprocessing application software layer notification module, fault debounce policy information, and the like. The fault consistency check is to ensure the correctness of the fault information table and ensure that all fault information is not illegally tampered. And fault consistency check is executed after each power-on or fault information calibration.
And when receiving fault information reported by the application software layer, the safety mechanism or the self-diagnosis module, the fault management module starts a fault timeout timer for monitoring whether delay exists in related operation of the fault, and if the fault preprocessing does not receive a reply signal of finishing preprocessing within a specified time, executes a processing flow corresponding to the timeout fault.
And step three, after the preprocessing is finished, the corresponding fault processing module performs corresponding functional safety processing.
Specifically, after the application module in the application software layer preprocesses the fault, the fault management module closes the timeout timer tracking the corresponding fault processing flow, and triggers the fault state notification module to notify the corresponding fault processing module to perform the corresponding functional safety processing.
In one embodiment, a vehicle function safety monitoring system is provided for implementing a vehicle function safety monitoring method, and specifically includes the following modules:
the self-testing module is arranged for carrying out integrity and safety self-testing on the modules in the whole vehicle function safety monitoring system;
the diagnostic test triggering module is used for triggering a diagnostic test in the running process of the system;
the error monitoring module is arranged for monitoring the functional operation state of the automobile electronic and electrical system;
the fault reporting module is arranged to report a fault notification to the fault debouncing module when a fault occurs;
the fault debouncing module is arranged for receiving the fault notification, judging the fault type and sending the fault type to the fault management module;
the fault management module is set to receive the fault type, start a fault overtime timer and call a fault information table to inquire a fault processing strategy; the fault timeout timer is set to monitor a fault handling process;
a failure policy information storage module configured to store failure handling policy information;
the fault consistency checking module is used for checking the consistency of the fault table information;
a fault status notification module configured to notify the application software layer to perform a functional safety operation.
In one embodiment, a computer device is proposed, comprising a memory and a processor, the memory storing a computer program, wherein the processor realizes the steps of a vehicle functional safety monitoring method when executing the computer program.
In one embodiment, a computer-readable storage medium is proposed, on which a computer program is stored which, when being executed by a processor, carries out the steps of a method for functional safety monitoring of a vehicle.
As noted above, while the present invention has been shown and described with reference to certain preferred embodiments, it is not to be construed as limited thereto. Various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A vehicle function safety monitoring method is characterized by comprising the following steps:
constructing a vehicle function safety monitoring system: the method comprises the steps of constructing a fault management module, a state machine, a fault state notification module, a debouncing module, a functional safety processing module and a fault information table;
the vehicle function safety monitoring system carries out self-test when being electrified;
when the self-test result is normal, the fault management module starts a state machine;
otherwise, the fault state notification module feeds back self-test failure information to the debounce module;
the debouncing module confirms the fault type according to the self-test failure information and sends the fault type to a fault management module;
the fault management module inquires in the fault information table according to the received fault type, and checks the fault consistency according to the inquiry result, if the consistency check is passed, the fault management module informs the application software layer module to carry out fault preprocessing according to the storage information in the fault information table;
after the fault preprocessing is finished, triggering a fault state notification module by a fault management module to send a functional safety processing notification, wherein the safety processing notification is used for triggering a functional safety processing module; the functional safety processing module is used for processing the generated faults.
2. The vehicle functional safety monitoring method according to claim 1,
the self-test process is realized through a self-test function; the self-testing function is used for carrying out one-time integrity and safety self-testing on modules in the whole vehicle function safety monitoring system in one-time automobile driving period.
3. The vehicle functional safety monitoring method according to claim 1,
and when the fault is not confirmed in the corresponding time or event period, the fault reporting processing is cancelled.
4. The vehicle functional safety monitoring method according to claim 1,
after the fault preprocessing is finished, the fault management module triggers a fault state notification module;
the fault state notification module notifies a corresponding application program to execute safety function operation; the corresponding application program is used for executing a program corresponding to the processing strategy; the processing policy is a fault processing method inquired in the fault information table according to the generated fault.
5. The vehicle functional safety monitoring method according to claim 1, wherein when a fault notification occurs, a fault preprocessing process is timed, and if a preset processing time is exceeded, a timeout fault processing method is executed.
6. The vehicle functional safety monitoring method according to claim 1, wherein the fault information table is used to store fault strategy information; the fault strategy information comprises a fault identification number, fault preprocessing overtime time, a fault preprocessing application software layer notification module and fault debouncing strategy information.
7. A vehicle functional safety monitoring system for implementing the method of any one of claims 1 to 6, comprising:
the self-testing module is arranged for carrying out integrity and safety self-testing on the modules in the whole vehicle function safety monitoring system;
the diagnostic test triggering module is used for triggering a diagnostic test in the running process of the system;
the error monitoring module is arranged for monitoring the functional operation state of the automobile electronic and electrical system;
the fault reporting module is arranged to report a fault notification to the fault debouncing module when a fault occurs;
the fault debouncing module is arranged for receiving the fault notification, judging the fault type and sending the fault type to the fault management module;
the fault management module is set to receive the fault type, start a fault overtime timer and call a fault information table to inquire a fault processing strategy;
a failure policy information storage module configured to store failure handling policy information;
the fault consistency checking module is used for checking the consistency of the fault table information;
an timeout timer configured to time a fault pre-processing procedure;
a fault status notification module configured to notify the application software layer to perform a functional safety operation.
8. A vehicle functional safety monitoring system according to claim 7,
the fault timeout timer is configured to monitor a fault handling process.
9. A computer arrangement comprising a memory and a processor, the memory storing a computer program, characterized in that the processor, when executing the computer program, carries out the steps of the vehicle functional safety monitoring method according to any one of claims 1 to 6.
10. 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 vehicle functional safety monitoring method according to any one of claims 1 to 6.
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