CN113872839B - Real vehicle testing method based on CAN signal automatic transmission and storage medium - Google Patents
Real vehicle testing method based on CAN signal automatic transmission and storage medium Download PDFInfo
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- CN113872839B CN113872839B CN202110995877.9A CN202110995877A CN113872839B CN 113872839 B CN113872839 B CN 113872839B CN 202110995877 A CN202110995877 A CN 202110995877A CN 113872839 B CN113872839 B CN 113872839B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L2012/40208—Bus networks characterized by the use of a particular bus standard
- H04L2012/40215—Controller Area Network CAN
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L2012/40267—Bus for use in transportation systems
- H04L2012/40273—Bus for use in transportation systems the transportation system being a vehicle
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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]
Abstract
The invention relates to the technical field of vehicle manufacturing, and provides a real vehicle testing method and a storage medium based on automatic CAN signal transmission, wherein correlation analysis is performed according to instruction information of each CAN instruction to generate a state transition array, and the transition relation between each CAN instruction CAN be predetermined, so that the generation of paradox testing in random testing CAN be avoided, the real vehicle testing data value is improved, the loss of invalid testing is reduced, and the testing efficiency is improved; the target CAN information set is obtained from the state transition array by adopting a mantissa method, the corresponding target CAN instruction set is obtained, real vehicle test is carried out, and most cases related to time sequence CAN be effectively tested by randomly sending effective messages, so that the method effectively covers places where manual test is incomplete.
Description
Technical Field
The invention relates to the technical field of vehicle manufacturing, in particular to a real vehicle testing method and a storage medium based on automatic CAN signal transmission.
Background
The software testing technology is an important component in the software development process, is an activity process for verifying and confirming software products (including staged products) throughout the whole software development life cycle, and aims to find various problems in the software products as soon as possible, check the defects of the software products and control the quality of the software products.
Many of the problems of the back-selling machines of great wall projects are the problem of the black screen of the user in the use process of the real vehicle, and the back-selling machines are returned. According to the research, the reason is that the real vehicle test is realized on the bench during the real vehicle running process, so that the test is extremely limited.
The simple single-scene test is generally a manual control vehicle machine test, the test scene is single, and the test efficiency is low; in the multi-scenario vehicle-mounted test, random data generated by a random algorithm is generally used as a test parameter, the data size of the test parameter is large, and repeated and invalid random data exist in the test parameter, so that the test efficiency is low.
Disclosure of Invention
The invention provides a real vehicle testing method and a storage medium based on automatic CAN signal transmission, which solve the technical problems that the existing real vehicle testing scheme cannot effectively cover a real vehicle scene, the testing data is incomplete and the testing efficiency is low.
In order to solve the technical problems, the invention provides a real vehicle testing method based on automatic CAN signal transmission, which comprises the following steps:
s1, performing correlation analysis according to instruction information of each CAN instruction to generate a state machine;
s2, acquiring a target CAN information set from the state machine by adopting a mantissa method;
and S3, acquiring a corresponding target CAN instruction set according to the target CAN information set, and executing real vehicle test.
The basic scheme performs correlation analysis according to the instruction information of each CAN instruction to generate the state transition array, and CAN predetermine the transition relation between each CAN instruction, thereby avoiding the generation of 'paradox' test in random test, improving the value of real vehicle test data, reducing the loss of invalid test and further improving the test efficiency; the target CAN information set is obtained from the state transition array by adopting a mantissa method, the corresponding target CAN instruction set is obtained, real-time test is carried out, and most cases related to time sequence CAN be effectively tested by randomly sending effective messages, so that the places where manual and manual tests are incomplete are effectively covered.
In a further embodiment, said step S1 comprises the steps of:
s11, acquiring the dependency relationship among the CAN commands from the command information of each CAN command;
s12, performing correlation analysis according to the dependency relationship among all the CAN instructions, determining all the migratable instructions of each CAN instruction, sequencing all the migratable instructions, and associating the CAN instructions with all the corresponding migratable instructions to obtain a state migration array;
and S13, associating each state transition array to obtain a state machine.
According to the scheme, the dependency relationship among the CAN instructions is obtained from the instruction information of each CAN instruction, correlation analysis is carried out, all migratable instructions of each CAN instruction are determined, after all migratable instructions are sequenced, the CAN instructions are correlated with all corresponding migratable instructions to obtain a state migration array for real vehicle test, not only CAN all operation scenes of a real vehicle machine be covered, but also the executability of an instruction set is determined through the dependency relationship, so that each test CAN be effectively executed, and the invalid loss is reduced.
In a further embodiment, said step S2 comprises the steps of:
s21, acquiring a front target number of preset irrational numbers according to a preset rule to obtain a target serial number;
s22, sequentially reading the corresponding state transition arrays according to the target serial number by adopting a mantissa method, and determining each digit in the instruction set sequence of the test;
and S23, acquiring corresponding CAN information from the state transition array in sequence according to the instruction set sequence, and integrating to obtain a target CAN information set.
In a further embodiment, the sequentially obtaining the corresponding CAN information from the state transition array according to the instruction set sequence specifically includes: and based on the current test node or the initial test node, sequentially reading each digit in the command set coding sequence, and matching the migratable commands with the same serial number in the state migration array to further acquire corresponding CAN information.
According to the scheme, the irrational number is preset, the target serial number is obtained by obtaining the front target number according to the preset rule, and sufficient and more subjective instruction set compilation sequence CAN be obtained by utilizing the infinite property of the irrational number, so that the real vehicle automatic test of multiple scenes is realized by obtaining the corresponding target CAN information set, and the test for improving the stability of the vehicle system is effectively realized.
In a further embodiment, in said step S22: and when the numerical value of the bit number read from the instruction set sequence is larger than the total number of the migratable instructions of the current test node or the initial test node, performing remainder adaptation.
The scheme sets a remainder adaptation principle, when the numerical value of the digit read in the command set coding sequence is larger than the total number of the migratable commands of the current test node or the initial test node, the next test node (the migratable command) can be quickly determined, and the automation degree of the test system is high.
In a further embodiment, in said step S22: the target sequence number can be read in sequence and in reverse order: when the digit of the calculation of the test exceeds the residual mantissa of the target serial number, namely the residual mantissa of the target serial number is read to be 0 in sequence, the target serial number is read again according to the reverse sequence, and the order set sequence of the test is determined; and when the residual mantissa of the target serial number read in the reverse order is 0, reading the target serial number again according to the order.
In a further embodiment, the present invention further comprises step S4: and recording the mantissa digits of the currently used target serial number, and using the mantissa digits as a loading node for obtaining the target CAN information set in the next test.
According to the scheme, by setting the sequential reading and the reverse reading of the target serial number, the automatic matching of the transferable instructions CAN be ensured, and the acquisition of a target CAN information set is further ensured, so that the smoothness of system testing is realized; and by setting a mantissa recording rule, the use value of the target serial number can be improved, and the comprehensiveness of the test is improved.
In a further embodiment, the predetermined irrational number comprises a circumference ratio,
In a further embodiment, said step S3 comprises:
s31, acquiring a corresponding target CAN instruction set according to the target CAN information set;
and S32, generating a CAN message according to the target CAN instruction set, sending the CAN message to a vehicle machine for execution, and acquiring an execution result.
According to the scheme, the corresponding target CAN instruction set is acquired, the CAN message is generated and sent to the vehicle machine for execution according to the target CAN information set, the execution result is acquired, the most complete SOC log output and the MCU log output are acquired through a complete rack, and the message receiving performance and compatibility of the MCU CAN be synchronously tested.
The present invention also provides a storage medium having stored thereon a computer program for implementing a real vehicle test method based on CAN signal automatic transmission. The storage medium may be a magnetic disk, an optical disk, a Read Only Memory (ROM), a Random Access Memory (RAM), or the like.
Drawings
Fig. 1 is a flowchart of a method for testing an actual vehicle based on automatic transmission of a CAN signal according to an embodiment of the present invention;
FIG. 2 is a diagram illustrating a data structure of a state machine according to an embodiment of the present invention;
FIG. 3 is a diagram illustrating the instruction set sequencing according to an embodiment of the present invention.
Detailed Description
The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, which are given solely for the purpose of illustration and are not to be construed as limitations of the invention, including the drawings which are incorporated herein by reference and for illustration only and are not to be construed as limitations of the invention, since many variations thereof are possible without departing from the spirit and scope of the invention.
Example 1
As shown in fig. 1, the real vehicle testing method based on CAN signal automatic transmission according to the embodiment of the present invention includes steps S1 to S4:
s1, performing correlation analysis according to the instruction information of each CAN instruction to generate a state machine, referring to FIG. 2, including steps S11-S13:
s11, acquiring the dependency relationship among the CAN commands from the command information of each CAN command;
s12, performing correlation analysis according to the dependency relationship among all the CAN instructions, determining all the migratable instructions of each CAN instruction, sequencing all the migratable instructions, and associating the CAN instructions with all the corresponding migratable instructions to obtain a state migration array;
and S13, associating each state transition array to obtain a state machine.
According to the method, the dependency relationship among the CAN instructions is obtained from the instruction information of each CAN instruction, correlation analysis is carried out, all migratable instructions of each CAN instruction are determined, after all migratable instructions are sequenced, the CAN instructions are associated with all corresponding migratable instructions, a state migration array is obtained to carry out real vehicle test, not only CAN all operation scenes of a real vehicle machine be covered, but also the performability of an instruction set is determined through the dependency relationship, so that each test CAN be effectively executed, and the ineffective loss is reduced.
S2, acquiring a target CAN information set from the state machine by adopting a mantissa method, referring to fig. 3, and comprising the following steps of S21-S23:
s21, acquiring the number of front targets of preset irrational numbers according to a preset rule to obtain a target serial number;
in the present embodiment, the predetermined irrational number includes, but is not limited to, a circumference ratio,
S22, sequentially reading corresponding state transition arrays according to the target serial number by adopting a mantissa method, and determining each digit in the instruction set sequence of the test;
and when the numerical value of the bit number read from the instruction set sequence is larger than the total number of the migratable instructions of the current test node or the initial test node, performing remainder adaptation.
In this embodiment, a remainder adaptation principle is set, and when the number of bits read in the instruction set coding sequence is greater than the total number of migratable instructions of the current test node or the initial test node, the next test node (migratable instruction) can be quickly determined, so that the test system has a high degree of automation.
In this embodiment, the target sequence number can be read sequentially, and read in reverse order: when the digit of the calculation of the test exceeds the residual mantissa of the target serial number, namely the residual mantissa of the sequentially read target serial number is 0, reading the target serial number again according to the reverse order, and determining the order sequence of the test; and when the residual mantissa of the target sequence number is read in the reverse order and is 0, reading the target sequence number again according to the order.
In the embodiment, by setting the sequential reading and the reverse reading of the target serial number, the automatic matching of the migratable instruction CAN be ensured, and the acquisition of the target CAN information set is further ensured, so that the smoothness of system testing is realized; and by setting a mantissa recording rule, the use value of the target serial number can be improved, and the comprehensiveness of the test is improved.
In the embodiment, the preset irrational number is adopted, the target serial number is obtained by obtaining the front target number according to the preset rule, and enough and more subjective instruction set compilation sequence CAN be obtained by utilizing the limitless property of the irrational number, so that the multi-scene real vehicle automatic test is realized by obtaining the corresponding target CAN information set, and the test for improving the stability of the vehicle machine system is effectively realized.
And S23, according to the command set coding sequence, sequentially acquiring corresponding CAN information from the state transition array, and integrating to obtain a target CAN information set.
In this embodiment, according to the instruction set sequence, sequentially acquiring the corresponding CAN information from the state transition array specifically includes: and based on the current test node or the initial test node, sequentially reading each digit in the command set coding sequence, matching migratable commands with the same serial number from the state migration array, and further acquiring corresponding CAN information.
S3, acquiring a corresponding target CAN instruction set according to the target CAN information set, and executing real vehicle test, wherein the steps of S31-S32 are as follows:
s31, acquiring a corresponding target CAN instruction set according to the target CAN information set;
and S32, generating a CAN message according to the target CAN instruction set, sending the CAN message to a vehicle machine for execution, and acquiring an execution result.
According to the embodiment, the corresponding target CAN instruction set is acquired, the CAN message is generated and sent to the vehicle machine for execution according to the target CAN information set, the execution result is acquired, the most complete SOC log output and the MCU log output are acquired through a complete rack, and the message receiving performance and compatibility of the MCU CAN be synchronously tested.
And S4, recording the mantissa digits of the currently used target serial number, taking the mantissa digits as a loading node for acquiring the target CAN information set in the next test, and repeating the steps S2 to S4.
And finally, repeating the step S2 to the step S4 to automatically generate a large batch of instruction set sequences, so that real vehicle test environments under various different application scenes can be simulated, and the coverage test of the real vehicle scenes is realized.
In this embodiment, taking the circumferential ratio as a preset irrational number as an example, referring to fig. 3, the obtaining process of the command set sequence in the real vehicle test is as follows:
the first 1 hundred million bits of the circumference ratio (i.e. the number of the front target bits, which can be set according to the actual user requirement) is obtained as the target serial number (i.e. 3.1415926535897932384 … …).
At this time, each digit of the circumferential ratio corresponds to the serial number of the corresponding command in each state transition array in the state machine.
With the boot node as the initial node, the target serial number is read for the first time, the 3 rd bit of the array in row I (second row (3) in fig. 3) is read, the 1 st bit of the array in row II (third row (1) in fig. 3) is read, the 4 th bit of the array in row III (fourth row (4) in fig. 3) is read, and so on until there is no array in the next row.
And then integrating the sequence numbers of the second row (3), the third row (1), the fourth row (4) and the like acquired above into an instruction set sequence.
If the total number of migratable instructions in the row VII array is only 6, the corresponding digit is "9", and the remainder is 3, then the third migratable instruction in the row VII array is taken.
If only 8 bits (namely 3.1415926) are used in the matching, the matching is started from the 9 th bit of the target serial number in the next round of testing.
According to the embodiment of the invention, correlation analysis is carried out according to the instruction information of each CAN instruction to generate the state transition array, and the transition relation between each CAN instruction CAN be predetermined, so that the generation of paradox tests in random tests CAN be avoided, the value of real vehicle test data is improved, the loss of invalid tests is reduced, and the test efficiency is improved; the target CAN information set is obtained from the state transition array by adopting a mantissa method, the corresponding target CAN instruction set is obtained, real vehicle test is carried out, and most cases related to time sequence CAN be effectively tested by randomly sending effective messages, so that the method effectively covers places where manual test is incomplete.
Example 2
An embodiment of the present invention further provides a storage medium, where a computer program is stored, where the computer program is used to implement the method for testing an actual vehicle based on the automatic transmission of the CAN signal provided in embodiment 1. The storage medium may be a magnetic disk, an optical disk, a Read Only Memory (ROM), a Random Access Memory (RAM), or the like.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (8)
1. A real vehicle test method based on automatic CAN signal transmission is characterized by comprising the following steps:
s1, performing correlation analysis according to instruction information of each CAN instruction to generate a state machine;
s2, acquiring a target CAN information set from the state machine by adopting a mantissa method;
s3, acquiring a corresponding target CAN instruction set according to the target CAN information set, and executing a real vehicle test;
the step S1 includes the steps of:
s11, acquiring the dependency relationship among the CAN commands from the command information of each CAN command;
s12, performing correlation analysis according to the dependency relationship among all the CAN instructions, determining all the migratable instructions of each CAN instruction, sequencing all the migratable instructions, and associating the CAN instructions with all the corresponding migratable instructions to obtain a state migration array;
s13, associating each state transition array to obtain a state machine;
the step S2 includes the steps of:
s21, acquiring a front target number of preset irrational numbers according to a preset rule to obtain a target serial number;
s22, sequentially reading the corresponding state transition arrays according to the target serial number by adopting a mantissa method, and determining each digit in the instruction set sequence of the test;
and S23, acquiring corresponding CAN information from the state transition array in sequence according to the instruction set sequence, and integrating to obtain a target CAN information set.
2. The real-vehicle testing method based on CAN signal automatic transmission of claim 1, wherein the sequentially obtaining the corresponding CAN information from the state transition array according to the command set sequence specifically comprises: and based on the current test node or the initial test node, sequentially reading each digit in the command set coding sequence, and matching the migratable commands with the same serial number in the state migration array to further acquire corresponding CAN information.
3. The real vehicle testing method based on CAN signal automatic transmission according to claim 2, wherein in the step S22: and when the numerical value of the bit number read from the instruction set sequence is larger than the total number of the migratable instructions of the current test node or the initial test node, performing remainder adaptation.
4. The real vehicle testing method based on CAN signal automatic transmission according to claim 1, wherein in the step S22: the target sequence number can be read in sequence and in reverse order: when the digit of the calculation of the test exceeds the residual mantissa of the target serial number, namely the residual mantissa of the target serial number is read to be 0 in sequence, the target serial number is read again according to the reverse sequence, and the order set sequence of the test is determined; and when the residual mantissa of the target serial number read in the reverse order is 0, reading the target serial number again according to the order.
5. The real vehicle testing method based on CAN signal automatic transmission of claim 1, further comprising step S4: and recording the mantissa digits of the currently used target serial number, and using the mantissa digits as a loading node for obtaining the target CAN information set in the next test.
6. The real vehicle test method based on CAN signal automatic transmission of claim 1, characterized in that: the preset irrational number comprises a circumference ratio,
7. The real vehicle testing method based on CAN signal automatic transmission according to claim 1, wherein the step S3 comprises:
s31, acquiring a corresponding target CAN instruction set according to the target CAN information set;
and S32, generating a CAN message according to the target CAN instruction set, sending the CAN message to a vehicle machine for execution, and acquiring an execution result.
8. A storage medium having a computer program stored thereon, characterized in that: the computer program is used for implementing a real vehicle testing method based on automatic CAN signal transmission according to any one of claims 1 to 7.
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