CN116775464A - Whole vehicle testing method and system - Google Patents
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Abstract
The invention provides a whole vehicle testing method and a whole vehicle testing system, wherein the method comprises the following steps: connecting upper computer software CANoe with the whole vehicle through an OBD interface, and acquiring a first frame message signal sent by each ECU module when the whole vehicle is electrified; analyzing and extracting the first frame message signal to obtain an identification code and message initial value data corresponding to each ECU module; and acquiring definition initial value data corresponding to the identification code through the CPAL script, and carrying out consistency comparison on the initial value data of each message and the definition initial value data to generate a test report containing a piece-by-piece comparison result. The method comprises the steps of collecting signal values of first frame message signals sent by all ECUs when the whole vehicle is powered on, extracting message initial value data defined in a signal DBC through a CPAL script, and carrying out consistency detection in batch automation to realize high accuracy, high efficiency and high coverage test of the consistency of the power-on initial value protocol of all ECUs of the whole vehicle.
Description
Technical Field
The invention relates to the technical field of vehicle testing, in particular to a vehicle testing method and system.
Background
The design of the existing test cases of the functions of the whole vehicle electrical appliance software is designed based on the function specifications of the modules.
With the continuous development of automobile electronic technology, functions contained in each module are not fixed, for example, functions originally realized by the cooperation of a plurality of modules are likely to be integrated on one module at present, and functions originally realized by one module are likely to be distributed on a plurality of modules for realizing together, so that for the test of the same electric appliance software function of the whole automobile, a plurality of test cases are required to be maintained, the test efficiency of the whole automobile is greatly affected, omission of the test cases is likely to occur, the problem cannot be recognized in time, and serious quality accidents are caused.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a whole vehicle testing method and system, and aims to solve the technical problem of lower efficiency of whole vehicle testing in the prior art.
In order to achieve the above object, the present invention is achieved by the following technical scheme: a whole vehicle testing method comprises the following steps:
connecting upper computer software CANoe with the whole vehicle through an OBD interface, and acquiring a first frame message signal sent by each ECU module when the whole vehicle is electrified;
analyzing and extracting the first frame message signal to obtain an identification code and message initial value data corresponding to each ECU module;
and acquiring definition initial value data corresponding to the identification codes through a CPAL script, and carrying out consistency comparison on the message initial value data and the definition initial value data so as to generate a test report containing a piece-by-piece comparison result.
Compared with the prior art, the invention has the beneficial effects that: the signal value of the first frame message signal sent by each ECU when the whole vehicle is electrified is acquired through the signal acquisition function of CANoe, then the extraction of the message initial value data defined in the signal DBC is realized through the CPAL script, then the batch comparison of the acquired message initial value data and the preset defined initial value data is realized through the CPAL script, and a test report containing a comparison result is automatically generated, so that the test of the consistency, the high accuracy, the high efficiency and the high coverage of the electrified initial value protocol of each ECU of the whole vehicle is realized.
According to an aspect of the foregoing technical solution, after the step of generating the test report including the piece-by-piece comparison result, the method further includes:
traversing the test report, and carrying out abnormal marking on each identification code which does not pass through the comparison result;
acquiring a message signal of an abnormal ECU module corresponding to the identification code, and preprocessing the message signal to obtain a signal value sequence;
classifying each abnormal ECU module according to a preset association module to obtain an association abnormal module group;
and carrying out relevance analysis on the message value sequences corresponding to the abnormal ECU modules in the relevance abnormal module group so as to screen out non-relevance ECU modules.
According to an aspect of the foregoing technical solution, after the step of screening out the non-associated ECU module, the method further includes:
comparing the signal value sequence corresponding to the non-associated ECU module with a preset signal value sequence;
if the comparison is inconsistent, marking the non-associated ECU module as a potential fault module, carrying out deep analysis on the potential fault module, and troubleshooting a fault reason based on an analysis result.
According to an aspect of the foregoing technical solution, the step of performing association analysis on the message value sequences corresponding to the abnormal ECU modules in the association abnormal module group specifically includes:
carrying out relevance analysis on the message value sequences of every two abnormal ECU modules in the relevance abnormal module group through the following calculation formula:
wherein X is i And Y i The i-th value in the two signal value sequences is respectively, mu x and mu y are respectively the average value of the two signal value sequences, sigma x and sigma y are respectively the standard deviation of the two signal value sequences, and p is the correlation coefficient.
According to an aspect of the above technical solution, the step of obtaining the first frame message signal sent by each ECU module when the whole vehicle is powered on specifically includes:
before receiving the first frame message signals sent by the ECU modules, running the upper computer software CANoe and confirming that the whole vehicle is in a dormant state;
and controlling the whole vehicle to be electrified so as to acquire a first frame message signal sent by each ECU module.
On the other hand, the invention also provides a whole vehicle testing system, which is characterized by comprising:
the acquisition module is used for connecting the upper computer software CANoe with the whole vehicle through the OBD interface and acquiring a first frame message signal sent by each ECU module when the whole vehicle is electrified;
the analysis module is used for analyzing and extracting the first frame message signals to obtain identification codes and message initial value data corresponding to the ECU modules;
and the comparison module is used for acquiring definition initial value data corresponding to the identification code through the CPAL script, and carrying out consistency comparison on the message initial value data and the definition initial value data so as to generate a test report containing a piece-by-piece comparison result.
According to an aspect of the above technical solution, the whole vehicle testing system further includes a screening module, configured to:
traversing the test report, and carrying out abnormal marking on each identification code which does not pass through the comparison result;
acquiring a message signal of an abnormal ECU module corresponding to the identification code, and preprocessing the message signal to obtain a signal value sequence;
classifying each abnormal ECU module according to a preset association module to obtain an association abnormal module group;
and carrying out relevance analysis on the message value sequences corresponding to the abnormal ECU modules in the relevance abnormal module group so as to screen out non-relevance ECU modules.
According to an aspect of the above technical solution, the whole vehicle testing system further includes a judging module, configured to:
comparing the signal value sequence corresponding to the non-associated ECU module with a preset signal value sequence;
if the comparison is inconsistent, marking the non-associated ECU module as a potential fault module, carrying out deep analysis on the potential fault module, and troubleshooting a fault reason based on an analysis result.
According to an aspect of the above technical solution, the comparison module is specifically configured to:
carrying out relevance analysis on the message value sequences of every two abnormal ECU modules in the relevance abnormal module group through the following calculation formula:
wherein X is i And Y i The i-th value in the two signal value sequences is respectively, mu x and mu y are respectively the average value of the two signal value sequences, sigma x and sigma y are respectively the standard deviation of the two signal value sequences, and p is the correlation coefficient.
According to an aspect of the foregoing technical solution, the obtaining module is specifically configured to:
before receiving the first frame message signals sent by the ECU modules, running the upper computer software CANoe and confirming that the whole vehicle is in a dormant state;
and controlling the whole vehicle to be electrified so as to acquire a first frame message signal sent by each ECU module.
Drawings
FIG. 1 is a flowchart of a vehicle testing method according to a first embodiment of the present invention;
FIG. 2 is a block diagram of a vehicle testing system according to a second embodiment of the present invention;
description of main reference numerals:
the device comprises an acquisition module 100, an analysis module 200 and a comparison module 300;
the invention will be further described in the following detailed description in conjunction with the above-described figures.
Detailed Description
In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. Several embodiments of the invention are presented in the figures. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "mounted" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1 to 2, a method for testing a whole vehicle according to a first embodiment of the invention includes the following steps:
and step S100, connecting the upper computer software CANoe with the whole vehicle through an OBD interface, and acquiring a first frame message signal sent by each ECU module when the whole vehicle is electrified. Specifically, in this step, the step of obtaining the first frame message signal sent by each ECU module when the whole vehicle is powered on specifically includes:
step S110, before receiving the first frame message signal sent by each ECU module, running the host computer software CANoe and confirming that the whole vehicle is in a sleep state.
And step S120, controlling the whole vehicle to be electrified so as to acquire a first frame message signal sent by each ECU module.
And step 200, analyzing and extracting the first frame message signal to obtain the identification codes and the initial message value data corresponding to each ECU module. The initial value in the first frame message signal, which is sent when the whole vehicle is powered on, is a preset value, which is equivalent to the starting end used for indicating start in the message, and the initial value is constant under the condition that the ECU module is normal. The identification code refers to the source of the message, and the identification code and the initial value data of the message can be analyzed through a DBC database in CANoe software.
Step S300, acquiring definition initial value data corresponding to the identification codes through a CPAL script, and carrying out consistency comparison on the message initial value data and the definition initial value data so as to generate a test report containing a piece-by-piece comparison result. The CPAL script is a tool in CANoe software, and through programming the CPAL script, the automatic extraction of the initial value can be realized, and the message initial value data and the definition initial value data are automatically compared, so that each ECU module is traversed rapidly, and the ECU module with the initial value inconsistent with the definition initial value, namely the abnormal ECU module is obtained.
Specifically, in some application scenarios of this embodiment, the host computer software CANoe is first connected with the whole vehicle through an OBD interface on the vehicle, then the whole vehicle DBC and initial value acquisition and comparison CPAL script is loaded to the CANoe software, the CANoe software is clicked and operated on a computer, a signal acquisition window of the CANoe is observed to confirm that the whole vehicle is in a dormant state at present, then the CANoe script is clicked and operated, the whole vehicle is powered on, the CANoe software waits for ending the operation of the CANoe script and generating a test report, the test report is extracted and referred, and items which do not pass the initial value comparison of the power-on signal are recorded in a test problem list as problem items for correction tracking.
In some application scenarios of this embodiment, in general, the initial value data of the message in the first frame of each ECU is compared with the defined initial value data individually one by one, and since the initial value comparison is to use the first initial data when power is applied to perform comparison, the content in the subsequent message is not related to the initial value data content, so that stability of data transmission needs to be ensured, that is, the initial value data of the message is stably obtained, if transmission abnormality occurs, when the initial value data of the message is not normally obtained, multiple comparison cannot occur in the comparison result, thereby affecting subsequent abnormal source judgment; in addition, under normal conditions, a situation that a large amount of initial message value data is abnormal is not usually generated, when a situation that a plurality of ECU modules generate abnormal initial message value data occurs, in order to prevent abnormal judgment of initial message value data caused by transmission or analysis errors, in some embodiments, after the step of generating the test report including the piece-by-piece comparison result, the method further includes:
and step S400, traversing the test report, and carrying out abnormal marking on each identification code which does not pass through the comparison result.
Step S410, a message signal of the abnormal ECU module corresponding to the identification code is obtained, and the message signal is preprocessed to obtain a signal value sequence.
The above-described sequence of signal values refers to a continuous recording of signal values produced by various sensors, controllers or devices in the vehicle. The acquisition of a sequence of signal values is typically based on time, with the signal being sampled at regular intervals over a period of time to form a continuous sequence of data. For example, a vehicle speed signal is acquired every second, and the vehicle speed values are recorded in time sequence, so as to obtain a vehicle speed signal value sequence.
The importance of the sequence of signal values is that it can provide a detailed understanding of the operating state and performance of the vehicle system. By analyzing and processing the signal value sequence, the working state of the vehicle can be monitored, faults can be detected, performance can be evaluated, data driving decision can be made, and the like. The signal value sequence is an important data source for testing and diagnosing the whole vehicle, and can provide a basic basis for designing, optimizing and maintaining a vehicle system.
And S420, classifying each abnormal ECU module according to a preset association module to obtain an association abnormal module group. It will be appreciated that in the actual application process, there is a certain association between the ECUs, for example, the engine control unit is responsible for managing and controlling the operation of the engine. It may interact and communicate data with sensors, actuators, and other associated ECUs, such as emission control units, fuel system control units, etc.; a brake system control unit monitors and controls a braking operation of the vehicle. It may interact and communicate with brake pressure sensors, anti-lock braking system (ABS) control units, traction control systems, etc.; the steering system control unit is responsible for controlling the steering operation of the vehicle. It may interact and communicate data with steering wheel angle sensors, steering assist control units, stability control systems, etc.; the instrument panel display unit is responsible for displaying instrument panel information of the vehicle, such as speed, rotation speed, oil quantity and the like. It may interact and communicate data with engine control units, sensors, on-board entertainment systems, etc.
And step S430, carrying out association analysis on the message value sequences corresponding to the abnormal ECU modules in the association abnormal module group so as to screen out non-association ECU modules. It can be understood that when the comparison of the initial value data of the plurality of messages is not passed through the step S300, and it is difficult to evaluate the abnormal sources of the vehicle by using the modules, the correlation analysis is performed on the message value sequences corresponding to the abnormal ECU modules in the correlation abnormal module group, because each message value in the correlation abnormal module group has a certain degree of correlation, if the correlation analysis of the data of the plurality of modules among the single correlation abnormal module group is correct, it is indicated that the ECU modules corresponding to each signal value sequence in the correlation abnormal module group are normal, so that a plurality of abnormal false alarms can be eliminated at the same time, so that the abnormal sources can be conveniently and rapidly screened, and compared with the sequential comparison and investigation on a plurality of data, the test efficiency can be improved.
Further, in some embodiments, in the step S430, the step of performing association analysis on the message value sequence corresponding to each abnormal ECU module in the association abnormal module group specifically includes:
step S431, performing association analysis on the message value sequences of every two abnormal ECU modules in the associated abnormal module group according to the following calculation formula:
wherein X is i And Y i The i-th value in the two signal value sequences is respectively, mu x and mu y are respectively the average value of the two signal value sequences, sigma x and sigma y are respectively the standard deviation of the two signal value sequences, and p is the correlation coefficient.
Specifically, the above-mentioned correlation coefficient p has a value ranging from-1 to 1, and a value close to 1 indicates that the two signals have a high correlation, a value close to-1 indicates that the two signals have a high negative correlation, and a value close to 0 indicates that there is no linear correlation between the two signals. By calculating the correlation coefficients of signals between different modules, consistency and accuracy of signal transmission can be evaluated. Higher correlation coefficient values indicate more accurate signaling between modules, and lower correlation coefficient values may indicate problems or anomalies.
Preferably, in some embodiments, after the step of screening out the non-associated ECU modules, the method further includes:
and S500, comparing the signal value sequence corresponding to the non-associated ECU module with a preset signal value sequence.
And step S510, if the comparison is inconsistent, marking the non-associated ECU module as a potential fault module, carrying out deep analysis on the potential fault module, and troubleshooting a fault reason based on an analysis result. Specifically, the purpose of this step is to perform final comparison and confirmation on the screened ECU modules to determine whether the screened ECU modules are normal, and it can be understood that in some application scenarios of this embodiment, when the number of ECU modules that are obtained after step S300 and that do not pass through the comparison is smaller, no correlation analysis is required, and whether the selected ECU modules have anomalies can be checked by obtaining a signal value sequence that does not pass through the comparison corresponding to the ECU modules, and directly through step S500 described above, so as to quickly obtain sources of anomalies, and improve test efficiency.
In summary, the whole vehicle testing method in the above embodiment of the present invention collects the signal value of the first frame message signal sent by each ECU when the whole vehicle is powered on through the signal collection function of the CANoe, then extracts the initial value data of the message defined in the signal DBC through the CPAL script, then performs batch comparison between the collected initial value data of the message and the preset defined initial value data through the CPAL script, and automatically generates a test report containing the comparison result, so as to realize the test of high accuracy, high efficiency and high coverage of the consistency of the power-on initial value protocol of each ECU of the whole vehicle, and after screening out the abnormal ECU modules which do not pass the comparison, further analysis and judgment can be performed by obtaining the signal value sequence corresponding to the abnormal ECU modules.
On the other hand, the second embodiment of the present invention further provides a whole vehicle testing system, including:
the acquisition module 100 is used for connecting the upper computer software CANoe with the whole vehicle through an OBD interface and acquiring a first frame message signal sent by each ECU module when the whole vehicle is electrified;
the analysis module 200 is configured to analyze and extract the first frame message signal to obtain an identification code and message initial value data corresponding to each ECU module;
and the comparison module 300 is used for acquiring the definition initial value data corresponding to the identification code through the CPAL script, and comparing the consistency of the message initial value data and the definition initial value data to generate a test report containing the comparison result piece by piece.
Preferably, in this embodiment, the whole vehicle testing system further includes a screening module, configured to:
traversing the test report, and carrying out abnormal marking on each identification code which does not pass through the comparison result;
acquiring a message signal of an abnormal ECU module corresponding to the identification code, and preprocessing the message signal to obtain a signal value sequence;
classifying each abnormal ECU module according to a preset association module to obtain an association abnormal module group;
and carrying out relevance analysis on the message value sequences corresponding to the abnormal ECU modules in the relevance abnormal module group so as to screen out non-relevance ECU modules.
Preferably, in this embodiment, the whole vehicle test system further includes a judging module, configured to:
comparing the signal value sequence corresponding to the non-associated ECU module with a preset signal value sequence;
if the comparison is inconsistent, marking the non-associated ECU module as a potential fault module, carrying out deep analysis on the potential fault module, and troubleshooting a fault reason based on an analysis result.
Preferably, in this embodiment, the comparison module 300 is specifically configured to:
carrying out relevance analysis on the message value sequences of every two abnormal ECU modules in the relevance abnormal module group through the following calculation formula:
wherein X is i And Y i The i-th value in the two signal value sequences is respectively, mu x and mu y are respectively the average value of the two signal value sequences, sigma x and sigma y are respectively the standard deviation of the two signal value sequences, and p is the correlation coefficient.
Preferably, in this embodiment, the above-mentioned acquisition module 100 is specifically configured to:
before receiving the first frame message signals sent by the ECU modules, running the upper computer software CANoe and confirming that the whole vehicle is in a dormant state;
and controlling the whole vehicle to be electrified so as to acquire a first frame message signal sent by each ECU module.
In summary, the whole vehicle testing method in the above embodiment of the present invention collects the signal value of the first frame message signal sent by each ECU when the whole vehicle is powered on through the signal collection function of the CANoe, then extracts the initial value data of the message defined in the signal DBC through the CPAL script, then performs batch comparison between the collected initial value data of the message and the preset defined initial value data through the CPAL script, and automatically generates a test report containing the comparison result, so as to realize the test of high accuracy, high efficiency and high coverage of the consistency of the power-on initial value protocol of each ECU of the whole vehicle, and after screening out the abnormal ECU modules which do not pass the comparison, further analysis and judgment can be performed by obtaining the signal value sequence corresponding to the abnormal ECU modules.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above examples merely represent a few embodiments of the present invention, which are described in more detail and are not to be construed as limiting the scope of the present invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of the invention should be assessed as that of the appended claims.
Claims (10)
1. The whole vehicle testing method is characterized by comprising the following steps of:
connecting upper computer software CANoe with the whole vehicle through an OBD interface, and acquiring a first frame message signal sent by each ECU module when the whole vehicle is electrified;
analyzing and extracting the first frame message signal to obtain an identification code and message initial value data corresponding to each ECU module;
and acquiring definition initial value data corresponding to the identification codes through a CPAL script, and carrying out consistency comparison on the message initial value data and the definition initial value data so as to generate a test report containing a piece-by-piece comparison result.
2. The vehicle testing method of claim 1, wherein after the step of generating the test report including the piece-by-piece comparison result, the method further comprises:
traversing the test report, and carrying out abnormal marking on each identification code which does not pass through the comparison result;
acquiring a message signal of an abnormal ECU module corresponding to the identification code, and preprocessing the message signal to obtain a signal value sequence;
classifying each abnormal ECU module according to a preset association module to obtain an association abnormal module group;
and carrying out relevance analysis on the message value sequences corresponding to the abnormal ECU modules in the relevance abnormal module group so as to screen out non-relevance ECU modules.
3. The vehicle testing method of claim 2, wherein after the step of screening out non-associated ECU modules, the method further comprises:
comparing the signal value sequence corresponding to the non-associated ECU module with a preset signal value sequence;
if the comparison is inconsistent, marking the non-associated ECU module as a potential fault module, carrying out deep analysis on the potential fault module, and troubleshooting a fault reason based on an analysis result.
4. The method for testing the whole vehicle according to claim 2, wherein the step of performing association analysis on the message value sequences corresponding to the abnormal ECU modules in the association abnormal module group specifically includes:
carrying out relevance analysis on the message value sequences of every two abnormal ECU modules in the relevance abnormal module group through the following calculation formula:
wherein X is i And Y i The i-th value in the two signal value sequences is respectively, mu x and mu y are respectively the average value of the two signal value sequences, sigma x and sigma y are respectively the standard deviation of the two signal value sequences, and p is the correlation coefficient.
5. The method for testing the whole vehicle according to claim 1, wherein the step of obtaining the first frame message signal sent by each ECU module when the whole vehicle is powered on specifically comprises:
before receiving the first frame message signals sent by the ECU modules, running the upper computer software CANoe and confirming that the whole vehicle is in a dormant state;
and controlling the whole vehicle to be electrified so as to acquire a first frame message signal sent by each ECU module.
6. The whole vehicle testing system is characterized by comprising:
the acquisition module is used for connecting the upper computer software CANoe with the whole vehicle through the OBD interface and acquiring a first frame message signal sent by each ECU module when the whole vehicle is electrified;
the analysis module is used for analyzing and extracting the first frame message signals to obtain identification codes and message initial value data corresponding to the ECU modules;
and the comparison module is used for acquiring definition initial value data corresponding to the identification code through the CPAL script, and carrying out consistency comparison on the message initial value data and the definition initial value data so as to generate a test report containing a piece-by-piece comparison result.
7. The vehicle testing system of claim 6, further comprising a screening module configured to:
traversing the test report, and carrying out abnormal marking on each identification code which does not pass through the comparison result;
acquiring a message signal of an abnormal ECU module corresponding to the identification code, and preprocessing the message signal to obtain a signal value sequence;
classifying each abnormal ECU module according to a preset association module to obtain an association abnormal module group;
and carrying out relevance analysis on the message value sequences corresponding to the abnormal ECU modules in the relevance abnormal module group so as to screen out non-relevance ECU modules.
8. The vehicle testing system of claim 7, further comprising a determination module configured to:
comparing the signal value sequence corresponding to the non-associated ECU module with a preset signal value sequence;
if the comparison is inconsistent, marking the non-associated ECU module as a potential fault module, carrying out deep analysis on the potential fault module, and troubleshooting a fault reason based on an analysis result.
9. The vehicle testing system of claim 7, wherein the comparison module is specifically configured to:
carrying out relevance analysis on the message value sequences of every two abnormal ECU modules in the relevance abnormal module group through the following calculation formula:
wherein X is i And Y i The i-th value in the two signal value sequences is respectively, mu x and mu y are respectively the average value of the two signal value sequences, sigma x and sigma y are respectively the standard deviation of the two signal value sequences, and p is the correlation coefficient.
10. The vehicle test system of claim 6, wherein the acquisition module is specifically configured to:
before receiving the first frame message signals sent by the ECU modules, running the upper computer software CANoe and confirming that the whole vehicle is in a dormant state;
and controlling the whole vehicle to be electrified so as to acquire a first frame message signal sent by each ECU module.
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| CN117176507B (en) * | 2023-11-02 | 2024-02-23 | 上海鉴智其迹科技有限公司 | Data analysis method, device, electronic equipment and storage medium |
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