CN114967651A - Vehicle body control unit fault code testing system and method - Google Patents
Vehicle body control unit fault code testing system and method Download PDFInfo
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- CN114967651A CN114967651A CN202210611798.8A CN202210611798A CN114967651A CN 114967651 A CN114967651 A CN 114967651A CN 202210611798 A CN202210611798 A CN 202210611798A CN 114967651 A CN114967651 A CN 114967651A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- 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
- G05—CONTROLLING; REGULATING
- 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
- G05B2219/24—Pc safety
- G05B2219/24065—Real time diagnostics
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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Abstract
The invention belongs to the technical field of automobile electrical test, and particularly relates to a system and a method for testing a fault code of an automobile body control unit; comprises a program control power supply, a fault injection device, a CAN box and a computer terminal; the computer end is in control connection with the programmable power supply, the programmable power supply is used for being electrically connected with the measured control unit and providing overvoltage and undervoltage for the measured control unit, the computer end is in control connection with the CAN box, and the CAN box is in signal connection with the measured control unit and CAN read fault code information from the measured control unit; the tester can make short circuit, open circuit, overvoltage and undervoltage faults through the system on the premise of not damaging the wiring harness, and can synchronously compare with fault code information through a computer terminal, thereby being beneficial to recording and positioning problems; compared with the traditional test mode, the system and the method can avoid damage to the wire harness, and can improve the test precision and further improve the test coverage.
Description
Technical Field
The invention belongs to the technical field of automobile electrical testing, and particularly relates to a system and a method for testing a fault code of an automobile body control unit.
Background
With the development of automobile electrical technology, the failure rate related to electrical functions is increased, and how to check and position the problem becomes the center of the current vehicle maintenance. Among them, the vehicle body control unit is one of important control units of a vehicle, and the test of a fault code of the vehicle body control unit occupies a very important position. However, the conventional vehicle body control unit fault code test scheme has many defects such as poor test precision, large destructiveness and incomplete coverage, and based on the current situation, a vehicle body control unit fault code test system needs to be developed urgently.
Disclosure of Invention
In order to overcome the problems, the invention provides a system and a method for testing the fault code of a vehicle body control unit, a tester can make the faults of short circuit, open circuit, overvoltage and undervoltage through the system on the premise of not damaging a wire harness, and can synchronously compare with fault code information through a computer terminal, thereby being beneficial to the recording and positioning of the problems; compared with the traditional test mode, the system and the method can avoid damage to the wire harness, and can improve the test precision and further improve the test coverage.
A vehicle body control unit fault code test system comprises a program control power supply, a fault injection device, a CAN box and a computer end; the computer end is in control connection with the programmable power supply, the programmable power supply is used for being electrically connected with the measured control unit and providing overvoltage and undervoltage for the measured control unit, the computer end is in control connection with the CAN box, and the CAN box is in signal connection with the measured control unit and CAN read fault code information from the measured control unit;
the fault injection device comprises a first switch, a second switch, a third switch and a power supply, wherein a computer end is connected with the first switch, the second switch and the third switch are in control connection, the first switch can be controlled, the second switch and the switch of the third switch are controlled, one end of the first switch is connected with a measured control unit through a wire, the other end of the first switch is connected with the power supply through a wire, one end of the second switch is connected with the measured control unit through a wire, the other end of the second switch is connected with an element which is used for being connected with the measured control unit on a vehicle through a wire, one end of the third switch is connected with the measured control unit through a wire, and the other end of the third switch is grounded through a wire.
The fault injection device further comprises a voltage measurement module, wherein the first switch, the second switch and the third switch are connected to the same lead together and connected with the measured control unit, the voltage measurement module is connected to the line, and the other end of the voltage measurement module is grounded.
The voltage measuring module is a voltmeter.
A fault code testing method for a vehicle body control unit comprises the following steps:
step one, setting is carried out at a computer end, so that the computer end CAN program the voltage output by a power supply and CAN be matched with a CAN box, fault code information is read from the CAN box, and the computer end controls the start time synchronization of the CAN box and a fault injection device;
step two, the computer end sets fault code test types according to the test contents, wherein the fault code test types comprise overvoltage faults, undervoltage faults, open-circuit faults and short-circuit faults;
the overvoltage fault is that the computer end controls the second switch to be conducted, and simultaneously controls the programmable power supply to input overvoltage to the measured control unit;
the under-voltage fault is that the computer end controls the conduction of the second switch and simultaneously controls the programmable power supply to input under-voltage to the measured control unit;
the open-circuit fault is that the computer end controls the first switch, the second switch and the third switch to be switched off;
the short-circuit fault is that the computer end controls the first switch to be conducted or the third switch to be conducted;
setting fault code test contents by the computer terminal according to the test contents, wherein the fault code test contents comprise fault trigger time, fault trigger operation, fault retention, fault self-clearing and fault code function degradation;
the fault triggering time is the time from the generation of the fault to the completion of the fault, and whether the time that the computer end CAN read the fault code from the CAN box is consistent with the actual generation time of the fault or not;
the fault triggering operation is that when any fault of the fault code test types in the second computer control step occurs, whether the state of the measured control unit is the same as the state which should be generated when the corresponding fault occurs or not is judged;
the fault is kept whether the fault code read from the CAN box by the computer end is consistent with the fault code state recorded in the measured control unit or not;
the fault self-clearing is that after each fault is finished, the computer end controls the programmable power supply to respectively power on and power off for a plurality of times, and after the last power on and power off, whether the measured control unit automatically eliminates the historical fault code or not is judged;
the function degradation of the fault codes is to determine whether the tested control unit can make a corresponding function degradation state according to the function requirements of the controlled unit when any fault of the fault code test types occurs in the second control step of the computer terminal;
step four, the tester combines the fault code test type in the step two and the fault code test content in the step three to form a test case according to the requirement;
and step five, controlling the corresponding part to finish the test by the computer end according to the test case, recording the data read by the computer end in the test process, comparing the data read in the test with the functional requirements, obtaining a test result, and finishing the test verification of the fault code of the vehicle body control unit.
In the short-circuit fault in the second step, the computer end controls the first switch to be in short-circuit fault when being conducted, and the computer end controls the third switch to be in short-circuit ground fault when being conducted.
And the fault code function degradation state in the third step comprises a function closing state, a function opening state, a function alarming state and a function standby state.
The invention has the beneficial effects that:
the computer end adjusts the power supply of the measured control unit by means of the program control power supply, so that the time and the voltage value of overvoltage and undervoltage are accurately adjusted; reading the fault code information of the measured control unit in real time by the computer terminal through the CAN box; the fault injection device is connected in series between the measured control unit and the vehicle under the condition of not damaging the wire harness, receives a control instruction of a computer end and accurately realizes the duration of open circuit and short circuit; in addition, the voltage value, the fault code information, the open circuit information, the short circuit information and the like are synchronously compared and analyzed at the computer end, so that the precision of the fault code test is improved, and the problem analysis and positioning of test and development personnel are facilitated.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.
FIG. 1 is a diagram of a test system architecture of the present invention.
Fig. 2 is a schematic diagram of the fault injection apparatus of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
Example 1
As shown in fig. 1, a fault code testing system for a vehicle body control unit comprises a programmable power supply, a fault injection device, a CAN box and a computer terminal; the computer end is in control connection with the programmable power supply, the programmable power supply is used for being electrically connected with the measured control unit and providing overvoltage and undervoltage for the measured control unit, the computer end is in control connection with the CAN box, the CAN box is in signal control connection with the measured control unit and CAN read fault code information from the measured control unit;
as shown in fig. 2, the fault injection device includes a first switch, a second switch, a third switch and a power supply, wherein the computer end is connected with the first switch, the second switch and the third switch in a control manner, and can control the switches of the first switch, the second switch and the third switch, and one end of the first switch is connected with the monitored control unit through a wire, and the other end is connected with the power supply through a wire, one end of the second switch is connected with the monitored control unit through a wire, and the other end is connected with an element on the vehicle through a wire, wherein the element is used for connecting the monitored control unit, one end of the third switch is connected with the monitored control unit through a wire, and the other end is grounded through a wire.
The fault injection device further comprises a voltage measurement module, wherein the first switch, the second switch and the third switch are connected to the same lead together and connected with the measured control unit, the voltage measurement module is connected to the line, and the other end of the voltage measurement module is grounded.
The voltage measuring module is a voltmeter.
A fault code testing method for a vehicle body control unit comprises the following steps:
step one, setting is carried out at a computer end, so that the computer end CAN program the voltage output by a power supply and CAN be matched with a CAN box, fault code information is read from the CAN box, and the computer end controls the start time synchronization of the CAN box and a fault injection device;
step two, the computer end sets fault code test types according to the test contents, wherein the fault code test types comprise overvoltage faults, undervoltage faults, open-circuit faults and short-circuit faults;
the overvoltage fault is that the computer end controls the second switch to be conducted, and simultaneously controls the programmable power supply to input overvoltage to the measured control unit;
the undervoltage fault is that the computer end controls the second switch to be conducted, and simultaneously controls the programmable power supply to input undervoltage to the controlled control unit;
the open-circuit fault is that the computer end controls the first switch, the second switch and the third switch to be switched off;
the short-circuit fault is that the computer end controls the first switch to be conducted or the third switch to be conducted;
setting fault code test contents by the computer terminal according to the test contents, wherein the fault code test contents comprise fault trigger time, fault trigger operation, fault retention, fault self-clearing and fault code function degradation;
the fault triggering time is the time from the generation of the fault to the completion of the fault, and whether the time that the computer end CAN read the fault code from the CAN box is consistent with the actual generation time of the fault or not;
the fault triggering operation is that when any fault of the fault code test types in the second computer end control step occurs, whether the state of the tested control unit is the same as the state which should be generated when the corresponding fault occurs or not is judged;
the fault is kept whether the fault code read from the CAN box by the computer end is consistent with the fault code state (whether the fault code is read to be the current fault or the historical fault) recorded in the measured control unit;
the fault self-clearing is that after each fault is finished, the computer end controls the programmable power supply to respectively power on and power off for 40 times, and after the last power on and power off, whether the measured control unit automatically eliminates the historical fault code or not is judged;
the function degradation of the fault code is to determine whether the tested control unit can make a corresponding function degradation state according to the function requirement (to see the tested unit) of the controlled unit when any fault of the fault code test type occurs in the second step of the computer end control;
step four, the tester combines the fault code test type in the step two and the fault code test content in the step three to form a test case according to the requirement;
and step five, controlling the corresponding part to finish the test by the computer end according to the test case, recording the data read by the computer end in the test process, comparing the data read in the test with the functional requirements, obtaining a test result, and finishing the test verification of the fault code of the vehicle body control unit.
In the short-circuit fault in the second step, the computer end controls the first switch to be in short-circuit fault when being conducted, and the computer end controls the third switch to be in short-circuit ground fault when being conducted.
And the fault code function degradation state in the third step comprises a function closing state, a function opening state, a function alarming state and a function standby state. Different tested control units show different fault code function degradation states when facing different faults.
Example 2
A vehicle body control unit fault code testing system and method.
The test system comprises a program-controlled power supply, a fault injection device, a CAN box and a computer terminal. The method is characterized in that: the computer end is connected with the program-controlled power supply, and the program-controlled power supply is connected with the controlled control unit to realize the control of overvoltage and undervoltage by software; the computer end is connected with the CAN box, and the CAN box is connected with the controlled control unit to realize the acquisition of fault code information; the computer end is connected with the fault injection device, one end of the fault injection device is connected with the measured control unit, and the other end of the fault injection device is connected with the vehicle, so that open-circuit, short-circuit and other faults are realized.
The test method comprises the following steps:
the method comprises the following steps that firstly, test system equipment is connected, a computer end is connected with a program-controlled power supply, the program-controlled power supply is connected with a measured control unit, the computer end is connected with a CAN box, the CAN box is connected with the measured control unit, the computer end is connected with a fault injection device, the fault injection device is connected with the measured control unit, and the fault injection device is connected with a vehicle.
And step two, software configuration, namely CAN software configuration including diagnosis ID and diagnosis service is required after the equipment connection is finished. And after the configuration is completed, setting the fault injection type according to the test content. And the CAN software box fault injection devices are all adjusted to network time for synchronization.
Step three, the test case forming thought used by the test system and the test method comprises the following steps: fault code test type, fault code test content and fault code functional degradation.
And step four, the tested control unit fault code test comprises a fault code test type, a fault code test content and fault code function degradation. The fault code test types mainly include overvoltage faults, undervoltage faults, open-circuit faults and short-circuit faults. The fault code test contents mainly comprise fault trigger time, fault trigger operation, fault maintenance and fault self-clearing. The function degradation of the fault code mainly comprises a function closing state, a function opening state, a function alarming state and a function standby state.
And step five, comprehensively considering the fault code test type, the fault code test content and the fault code function degradation to obtain a test case.
And step six, after the test case is generated, executing the test case, and recording corresponding data of each test case by the test system in the executing process, wherein the corresponding data comprises fault information and fault injection related information of the tested control unit.
And step seven, completing the test execution work, and comparing the test data with the function requirements to obtain a test result. And completing the test and verification of the fault code of the vehicle body control unit.
Although the preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, the scope of the present invention is not limited to the specific details of the above embodiments, and any person skilled in the art can substitute or change the technical solution of the present invention and its inventive concept within the technical scope of the present invention, and these simple modifications belong to the scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (6)
1. A vehicle body control unit fault code test system is characterized by comprising a program control power supply, a fault injection device, a CAN box and a computer end; the computer end is in control connection with the programmable power supply, the programmable power supply is used for being electrically connected with the measured control unit and providing overvoltage and undervoltage for the measured control unit, the computer end is in control connection with the CAN box, and the CAN box is in signal connection with the measured control unit and CAN read fault code information from the measured control unit;
the fault injection device comprises a first switch, a second switch, a third switch and a power supply, wherein a computer end is connected with the first switch, the second switch and the third switch are in control connection, the first switch can be controlled, the second switch and the switch of the third switch are controlled, one end of the first switch is connected with a measured control unit through a wire, the other end of the first switch is connected with the power supply through a wire, one end of the second switch is connected with the measured control unit through a wire, the other end of the second switch is connected with an element which is used for being connected with the measured control unit on a vehicle through a wire, one end of the third switch is connected with the measured control unit through a wire, and the other end of the third switch is grounded through a wire.
2. The vehicle body control unit fault code testing system according to claim 1, wherein the fault injection device further comprises a voltage measurement module, wherein the first switch, the second switch and the third switch are connected to the same wire to be connected with the controlled control unit, the voltage measurement module is connected to the wire, and the other end of the voltage measurement module is grounded.
3. The vehicle body control unit fault code testing system of claim 2, wherein the voltage measurement module is a voltmeter.
4. A fault code testing method for a vehicle body control unit is characterized by comprising the following steps:
step one, setting is carried out at a computer end, so that the computer end CAN program the voltage output by a power supply and CAN be matched with a CAN box, fault code information is read from the CAN box, and the computer end controls the start time synchronization of the CAN box and a fault injection device;
step two, the computer end sets fault code test types according to the test contents, wherein the fault code test types comprise overvoltage faults, undervoltage faults, open-circuit faults and short-circuit faults;
the overvoltage fault is that the computer end controls the second switch to be conducted, and simultaneously controls the programmable power supply to input overvoltage to the measured control unit;
the under-voltage fault is that the computer end controls the conduction of the second switch and simultaneously controls the programmable power supply to input under-voltage to the measured control unit;
the open-circuit fault is that the computer end controls the first switch, the second switch and the third switch to be switched off;
the short-circuit fault is that the computer end controls the first switch to be conducted or the third switch to be conducted;
setting fault code test contents by the computer terminal according to the test contents, wherein the fault code test contents comprise fault trigger time, fault trigger operation, fault retention, fault self-clearing and fault code function degradation;
the fault triggering time is the time from the generation of the fault to the completion of the fault, and whether the time that the computer end CAN read the fault code from the CAN box is consistent with the actual generation time of the fault or not;
the fault triggering operation is that when any fault of the fault code test types in the second computer end control step occurs, whether the state of the tested control unit is the same as the state which should be generated when the corresponding fault occurs or not is judged;
the fault is kept whether the fault code read from the CAN box by the computer end is consistent with the fault code state recorded in the measured control unit or not;
the fault self-clearing is that after each fault is finished, the computer end controls the programmable power supply to respectively power on and power off for a plurality of times, and after the last power on and power off, whether the measured control unit automatically eliminates the historical fault code or not is judged;
the function degradation of the fault code is to determine whether the tested control unit can make a corresponding function degradation state according to the function requirements of the tested control unit when any fault of the fault code test types occurs in the second control step of the computer terminal;
step four, the tester combines the fault code test type in the step two and the fault code test content in the step three to form a test case according to the requirement;
and step five, controlling the corresponding part to finish the test by the computer end according to the test case, recording the data read by the computer end in the test process, comparing the data read in the test with the functional requirements, obtaining a test result, and finishing the test verification of the fault code of the vehicle body control unit.
5. The method as claimed in claim 4, wherein the short-circuit fault in the second step is a short-circuit fault when the computer controls the first switch to be turned on, and the computer controls the third switch to be turned on.
6. The method for testing the fault codes of the vehicle body control unit according to claim 4, wherein the fault code function degradation states in the third step comprise a function off state, a function on state, a function alarm state and a function standby state.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210611798.8A CN114967651A (en) | 2022-05-31 | 2022-05-31 | Vehicle body control unit fault code testing system and method |
| PCT/CN2022/127305 WO2023231279A1 (en) | 2022-05-31 | 2022-10-25 | Vehicle body control unit fault code test system and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210611798.8A CN114967651A (en) | 2022-05-31 | 2022-05-31 | Vehicle body control unit fault code testing system and method |
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| CN202210611798.8A Pending CN114967651A (en) | 2022-05-31 | 2022-05-31 | Vehicle body control unit fault code testing system and method |
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| WO (1) | WO2023231279A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023231279A1 (en) * | 2022-05-31 | 2023-12-07 | 一汽奔腾轿车有限公司 | Vehicle body control unit fault code test system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7890810B1 (en) * | 2008-02-26 | 2011-02-15 | Network Appliance, Inc. | Method and apparatus for deterministic fault injection of storage shelves in a storage subsystem |
| CN202870210U (en) * | 2012-10-24 | 2013-04-10 | 北京经纬恒润科技有限公司 | Fault injection circuit and device |
| CN111475357A (en) * | 2020-03-31 | 2020-07-31 | 北京经纬恒润科技有限公司 | Bus fault injection system |
| CN216248912U (en) * | 2021-11-23 | 2022-04-08 | 上海沃尔沃汽车研发有限公司 | Fault injection device for testing vehicle ECU |
| CN114967651A (en) * | 2022-05-31 | 2022-08-30 | 一汽奔腾轿车有限公司 | Vehicle body control unit fault code testing system and method |
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- 2022-05-31 CN CN202210611798.8A patent/CN114967651A/en active Pending
- 2022-10-25 WO PCT/CN2022/127305 patent/WO2023231279A1/en unknown
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023231279A1 (en) * | 2022-05-31 | 2023-12-07 | 一汽奔腾轿车有限公司 | Vehicle body control unit fault code test system and method |
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