CN108415408A - Automobile packet parsing based on CAN communication and method for diagnosing faults - Google Patents
Automobile packet parsing based on CAN communication and method for diagnosing faults Download PDFInfo
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- CN108415408A CN108415408A CN201810220040.5A CN201810220040A CN108415408A CN 108415408 A CN108415408 A CN 108415408A CN 201810220040 A CN201810220040 A CN 201810220040A CN 108415408 A CN108415408 A CN 108415408A
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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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Abstract
The present invention provides a kind of automobile packet parsing and method for diagnosing faults based on CAN communication, and applied in the test device being made of database, processor and operation display interface, the method comprising the steps of：The original message of several electrical nodes is obtained from the vehicle diagnostics interface of vehicle by CAN bus, is stored in database；It is screened in original message using frame ID as keyword after defining screening conditions, filters out corresponding record, statistics meets the frame ID numbers of screening conditions；Batch parsing is carried out, every is obtained and records corresponding analysis result；Original message stores in the database forms a tables of data, and tables of data is made of several records.By above-mentioned automobile packet parsing and method for diagnosing faults based on CAN communication, to that can be directly stored in the database of program with the collected original message of CAN cards, front-end interface can parse the message of reading.
Description
Technical field
The present invention relates to automotive fields, more particularly to the automobile packet parsing based on CAN communication and method for diagnosing faults.
Background technology
As the maturation of new energy technology and gradually popularization, the attention rate and popularity rate of pure electric automobile are higher and higher.Phase
To orthodox car, pure electric automobile vehicle high-low pressure electric control element increases, power battery management, driving motor control and vehicle control
The electronics electronic control technologies such as the key technologies such as system require to increase.So each number of nodes increases in vehicle CAN bus, exchanged on node
It also becomes increasingly complex with the information of transmission.If wanting, understand information of vehicles or vehicle use there is electric fault in the process, using original
Beginning, the original message that manual analysis mode processing vehicle diagnostics interface acquires is computationally intensive, error rate is high, inefficiency.
Invention content
The technical scheme is that the automobile packet parsing based on CAN communication and method for diagnosing faults, applied to by counting
In the test device constituted according to library, processor and operation display interface, the method includes the steps：
S1, the original message for obtaining several electrical nodes from the vehicle diagnostics interface of vehicle by CAN bus, deposit
In database；
After S21, user define screening conditions by operation display interface, using frame ID as keyword in the original message
In screened, filter out corresponding record, statistics meets the frame ID numbers of screening conditions；
S22, batch parsing is carried out to the record filtered out, obtains every and records corresponding analysis result；
Wherein, the original message stores in the database forms a tables of data, and the tables of data is by several
The record is constituted, and every record includes serial number, time identifier, title, frame ID, format, type, data length and data.
Preferably, the above-mentioned process screened to the record is：
The new virtual data table defined in processor storage, according to the corresponding parameter sets information of the keyword,
Respective field is added in virtual data table；
The record using each in tables of data in cyclical function extraction database with the keyword, by the record
It is sequentially written in the virtual data table；
It is above-mentioned to be to recording the process parsed：
The record is subjected to byte conversion；
According to the vehicle can communications protocol that vehicle is set, the corresponding backstage operation function of the keyword is transferred, described in
Corresponding all information are recorded to parse；
Parsing content is stored in the virtual data table.
Preferably, in the data parsing information include delete duplicate message order when, in the step s 21, transfer and
When the corresponding record of the keyword, the record record of repetition is deleted.
Preferably, further including step after step s 22：
S23, after user sends out Query Information by operation display interface, virtual data is shown on operation display interface
The content of table.
Preferably, further including step after step S1：
S31, after the test device receives node frame ID, judge whether there is ID pairs of the node frame in the database
The message information answered, if so, executing step S32；Otherwise, prompt is no on the display screen corresponds to message information；
S32, the corresponding records of node frame ID always total number is counted, and judges the word of message information according to node frame ID
Whether joint number is correct, judges the message information mistake, the message information of deletion error when incorrect.
Preferably, each electrical node corresponds to a node frame ID.
Preferably, further including step after step S1：
S41, in the test device receive frame ID and record after, the processor searches whether from the database
There are frame ID and record corresponding message information, and if it exists, execute step S42；Otherwise, judge that frame ID and record are invalid,
Slack byte is shown on the display；
S42, the corresponding analysis result of the message information is parsed, exports the analysis result on a display screen.
Preferably, further including step after step S1：
S51, after the test device receives electrical node signal or information type signal, processor inquiry should
Electrical node signal or the corresponding frame ID of information type signal, and all messages with frame ID are obtained according to frame ID and are believed
Breath；
All message informations that S52, parsing inquire, obtain analysis result.
Preferably, the electrical node includes battery management system, entire car controller, motor and its electric-control system and electricity
Gas attachment.
Preferably, the analysis result includes recording corresponding information type, the data target of the information type and right
The electrical node answered whether failure.
Above-mentioned technical proposal has the following advantages that or advantageous effect：Pass through the above-mentioned automobile packet parsing based on CAN communication
And method for diagnosing faults, to that can be directly stored in the database of program with the collected original message of CAN cards, front-end interface can solve
Analyse the message read；It is perfectly facing user's design, simple interface is beautiful, easy to use, it can be achieved that the single frames parsing of message, batch
Parsing, classified browse, the functions such as fault diagnosis；Vehicle CAN communication node can be according to not as the setting browser interface such as BMS, VCU
Same information requirement selects viewing conditions, and different data base querying modes is arranged from the background and transfers different data, facilitates observation
The real-time change of data；If the message that node is sent out is failure and warning message, if can be by being solved in being parsed in back-end data
Abnormal situation is precipitated, which can be labeled when showing in foreground is shown, fast and easy analyzes fault point and handles vapour
Vehicle failure；System mainly uses sql sentence combinations ado.net to realize database manipulation, can carry out secondary development.
Description of the drawings
With reference to appended attached drawing, more fully to describe the embodiment of the present invention.However, appended attached drawing be merely to illustrate and
It illustrates, and is not meant to limit the scope of the invention.
Fig. 1 is that the present invention is based on the flow diagrams one of the automobile packet parsing of CAN communication and method for diagnosing faults；
Fig. 2 is that the present invention is based on the flow diagrams two of the automobile packet parsing of CAN communication and method for diagnosing faults；
Fig. 3 is that the present invention is based on the flow diagrams three of the automobile packet parsing of CAN communication and method for diagnosing faults；
Fig. 4 is that the present invention is based on the flow diagrams four of the automobile packet parsing of CAN communication and method for diagnosing faults.
Specific implementation mode
In the following with reference to the drawings and specific embodiments to the present invention is based on the automobile packet parsing of CAN communication and fault diagnosis sides
Method is described in detail.
As shown in Figure 1, a kind of automobile packet parsing and method for diagnosing faults based on CAN communication, be applied to by database,
In the test device that processor and operation display interface are constituted, including step：
S1, the original message for obtaining several electric appliance nodes of vehicle from the vehicle diagnostics interface of vehicle by CAN bus,
It is stored in database；
S21, user define screening conditions by operation display interface, are carried out in original message using frame ID as keyword
Screening, filters out corresponding record, and statistics meets the frame ID numbers of screening conditions；
S22, batch parsing is carried out to the record filtered out, obtains every and records corresponding analysis result.
Specifically, it first has to pass through in automobile packet parsing and method for diagnosing faults based on CAN communication above-mentioned
CAN bus obtains from the vehicle diagnostics interface of vehicle and obtains original message in several electrical nodes, that is, utilizes CAN bus will
Original message in vehicle is stored in into the database of test device, in order to which follow-up test device is to original message in database
Inquiry, processing etc..Later, if user defines screening conditions by operation display interface, exist using frame ID as keyword
Screened in original message, to filter out corresponding record, wherein record in comprising need serial number, time identifier, type,
The fields such as data, while statistics meets the frame ID numbers of screening conditions.It in this way, can be directly by the message of vehicle
Simultaneously, user can directly screen required original message by test device, and no longer need right for unified acquisition
When some electrical node detects, it is required for individually taking the corresponding original message of the electrical node from vehicle.Wherein above-mentioned vehicle
Diagnosis interface is original message for acquiring vehicle, which connect with several bar electrical nodes, electrically section
The original message of each node is transferred to by vehicle diagnostics interface in test device by point.
For further, in above-mentioned steps S1, interception original message is stored as a tables of data, the data in the database
It is made of several records in table, each record includes serial number, time identifier, title, frame ID, format, type, data length
(DLC), the information such as data, each information are data frame as a field in table, wherein format fields, and type field is to expand
Frame is opened up, the length of DLC 8, i.e. data segment are generally 8 bytes.It is worth noting that using serial number keyword to distinguish not
Same record.
For further, above-mentioned electrical node includes battery management system (BMS), full-vehicle control in CAN communication network
Device (VCU), motor and its electric-control system (MCU) and electric attachments, the electric attachments include instrument, charger etc..
For further, the above-mentioned process screened to record is：
The new virtual data table defined in processor storage, according to the corresponding parameter sets informations of keyword frame ID, in void
Respective field is added in quasi- tables of data；
Extract in database that each has the record of above-mentioned keyword ID in tables of data using cyclical function, will record according to
In secondary write-in virtual data table.
For further, the process parsed to record is：
Record is carried out to the conversion of byte or position；
Specifically, some information contents are not necessarily to be indicated with a byte (byte has eight positions), or even with two
Position can show such as the closure off-state of certain relay contacts；One byte of some information cannot indicate, express
Content need to be indicated with several bytes, such as real-time speed；
According to the vehicle CAN communication agreement that vehicle is set, the corresponding backstage operation functions of design frame ID are corresponding recording
All information parse；
In new virtual data table the deposit definition of parsing content.
It is worth noting that in above process, it is corresponding that processor searches respective frame ID from vehicle can communications protocol
Parameter sets information, i.e. vehicle can communications protocol be stored with the corresponding parameter sets informations of all frame ID and each record it is corresponding
Analysis result can carry out field addition after inquiring parameter sets information to virtual data table.In addition, empty write-in will be recorded
When in quasi- tables of data, when storage, should be corresponding with the field name of virtual data table.
Later, further include after step s 22 process：
S23, after user sends out Query Information by operation display interface, virtual data is shown on operation display interface
The content of table.In practical application, i.e., user after inputting specific frame ID in the window as clicked " inquiry " button, backstage trigger
Run the browsing, it can be achieved that tables of data.
For further, when further including deletion duplicate message order in step sl, in screening conditions, in the step s 21,
When transferring record corresponding with frame ID, the record of repetition is deleted, and the message after each record deletion repetition number record is deposited
In the new virtual data table for entering definition, reduces subsequent packet and parse workload.In practical applications, due to message frequency acquisition
Height, record quantity is more, in the way of the deletion duplicate message, can improve the readability of message.In addition, every in final display
While a message corresponding analysis result, additionally it is possible to the number for showing duplicate message, so as to checking for user.
For further, as shown in Fig. 2, further including step after step S1：
S31, after test device receives node frame ID, judge whether there are the corresponding original messages of frame ID in database,
If so, executing step S32；Otherwise, prompt does not have corresponding node original message on operation display interface；
S32, the corresponding record total numbers of node frame ID are counted, and judges the byte number of original message according to node frame ID
It is whether correct, the original message mistake, the original message of deletion error are judged when incorrect.
Specifically, if user needs to inquire the original message of a specific electrical node, the electricity is sent out to test device
It is former to judge whether there is the corresponding nodes of node frame ID for the corresponding node frame ID of moral point, data in processor reading database
Beginning message, if so, statistics respective number.It is worth noting that in this process, in order to ensure the accurate of final original message
Property, so needing to judge the original message searched.The deterministic process is referred to judges original report according to node frame ID
Whether the byte number of text is correct, if incorrect, illustrates the original message mistake and be stored in data base procedure to cause to report
Literary mistake, the original message of deletion error.It is worth noting that each electrical node corresponds to a node frame ID.
For further, as shown in figure 3, further including step after step S1：
S41, after test device receives frame ID and record, processor search whether from database there are frame ID and
Record corresponding original message, and if it exists, execute step S42；Otherwise, judge that frame ID and record are invalid, show over the display
Show slack byte；
S42, the corresponding analysis result of the original message is parsed, the analysis result is exported on operation display interface.
Specifically, the frame ID and record that the original message of acquisition is inputted in operation interface, directly export frame ID and
The included corresponding analysis result of original message of record records " 08 06 00 FD C9 00 such as input frame ID1818D0F3
00 00 ", analysis result is browsable " assembled battery total voltage, battery pack total current, SOC and battery alarm information ".If it is invalid to exist
Byte compares in being parsed by back-end data with prepending non-significant byte, if there are slack byte, it can be at corresponding position be shown
Reason.
For further, above-mentioned analysis result includes the number of the corresponding information type of the original message, the information type
According to index, corresponding electrical node whether failure etc..
For further, as shown in figure 4, further including step after step S1：
S51, after test device receives electrical node signal or information type signal, processor inquires the electrical node
Signal or the corresponding frame ID of information type, and all original messages with frame ID are obtained according to frame ID；
All original messages that S52, parsing inquire, obtain analysis result.
Specifically, if needing in batch parsing CAN network known specific electrical node or when specific information type, such as
MCU (electric machine controller) issues the information etc. of VCU (entire car controller), can directly set querying condition, parses the message number
The information such as rotating speed request, torque requests, motor operation direction, the control model for including according to frame.In testing time section.All notes
Record all shows that batch parses.
By above-mentioned automobile packet parsing and method for diagnosing faults based on CAN communication, to collected original with CAN cards
Message can be directly stored in the database of program, and front-end interface can parse the message of reading；It is perfectly facing user's design, interface letter
Clean beauty, it is easy to use, it can be achieved that the single frames parsing of message, in batches parsing, classified browse, the functions such as fault diagnosis；Vehicle CAN
Communication node can select viewing conditions, backstage setting is not as the setting browser interface such as BMS, VCU according to different information requirements
Same data base querying mode transfers different data, facilitates the real-time change of observation data；If the message that node is sent out is
Failure and warning message, if can be by parsing abnormal situation in being parsed in back-end data, which can be preceding when showing
Platform is labeled in showing, fast and easy analyzes fault point and handles vehicle failure；System is mainly combined using sql sentences
Ado.net realizes database manipulation, can carry out secondary development.All information between control unit all by two data lines into
Row exchanges, and this data line is also CAN bus.Each node of access network has title and address.CAN bus system
Using the layout for enormously simplifying vehicle body circuit, the stability of vehicle body electric-control system is also improved.
For a person skilled in the art, after reading above description, various changes and modifications undoubtedly will be evident.
Therefore, appended claims should regard the whole variations and modifications for covering the true intention and range of the present invention as.It is weighing
The range and content of any and all equivalences within the scope of sharp claim, are all considered as still belonging to the intent and scope of the invention.
Claims (10)
1. the automobile packet parsing based on CAN communication and method for diagnosing faults are applied to be grasped by database, processor and display
In the test device for making interface composition, which is characterized in that the method includes the steps：
S1, the original message for obtaining several electrical nodes from the vehicle diagnostics interface of vehicle by CAN bus are stored in data
In library；
After S21, user define screening conditions by operation display interface, using frame ID as keyword in the original message into
Row screening, filters out corresponding record, and statistics meets the frame ID numbers of screening conditions；
S22, batch parsing is carried out to the record filtered out, obtains every and records corresponding analysis result；
Wherein, the original message stores in the database forms a tables of data, and the tables of data is described in several
Record is constituted, and every record includes serial number, time identifier, title, frame ID, format, type, data length and data.
2. automobile packet parsing and method for diagnosing faults according to claim 1 based on CAN communication, which is characterized in that
The above-mentioned process screened to the record is：
The new virtual data table defined in processor storage, according to the corresponding parameter sets information of the keyword, in void
Respective field is added in quasi- tables of data；
There is the record of the keyword using each in tables of data in cyclical function extraction database, successively by the record
It is written in the virtual data table；
It is above-mentioned to be to recording the process parsed：
The record is subjected to byte conversion；
According to the vehicle can communications protocol that vehicle is set, the corresponding backstage operation function of the keyword is transferred, the record
Corresponding all information parse；
Parsing content is stored in the virtual data table.
3. automobile packet parsing and method for diagnosing faults according to claim 2 based on CAN communication, which is characterized in that
When data parsing information includes deleting duplicate message order, in the step s 21, transfer corresponding with the keyword
When record, the record of repetition is deleted.
4. automobile packet parsing and method for diagnosing faults according to claim 2 based on CAN communication, which is characterized in that
Further include step after step s 22：
S23, after user sends out Query Information by operation display interface, virtual data table is shown on operation display interface
Content.
5. automobile packet parsing and method for diagnosing faults according to claim 1 based on CAN communication, which is characterized in that
Further include step after step S1：
S31, after the test device receives node frame ID, judge whether have node frame ID corresponding in the database
Message information, if so, executing step S32；Otherwise, prompt is no on the display screen corresponds to message information；
S32, the corresponding records of node frame ID always total number is counted, and judges the byte number of message information according to node frame ID
It is whether correct, the message information mistake, the message information of deletion error are judged when incorrect.
6. automobile packet parsing and method for diagnosing faults according to claim 5 based on CAN communication, which is characterized in that
Each electrical node corresponds to a node frame ID.
7. automobile packet parsing and method for diagnosing faults according to claim 1 based on CAN communication, which is characterized in that
Further include step after step S1：
S41, in the test device receive frame ID and record after, the processor searches whether exist from the database
Frame ID and record corresponding message information, and if it exists, execute step S42；Otherwise, judge that frame ID and record are invalid, in institute
It states and shows slack byte on display；
S42, the corresponding analysis result of the message information is parsed, exports the analysis result on a display screen.
8. automobile packet parsing and method for diagnosing faults according to claim 1 based on CAN communication, which is characterized in that
Further include step after step S1：
S51, after the test device receives electrical node signal or information type signal, it is electrical that the processor inquires this
Node signal or the corresponding frame ID of information type signal, and all message informations with frame ID are obtained according to frame ID；
All message informations that S52, parsing inquire, obtain analysis result.
9. automobile packet parsing and method for diagnosing faults according to claim 1 based on CAN communication, which is characterized in that
The electrical node includes battery management system, entire car controller, motor and its electric-control system and electric attachments.
10. the automobile packet parsing and method for diagnosing faults based on CAN communication according to claim 1 or 7 or 8, special
Sign is, the analysis result includes recording corresponding information type, the data target of the information type and corresponding electrical
Node whether failure.
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| CN109204193A (en) * | 2018-10-12 | 2019-01-15 | 杭州小驹物联科技有限公司 | A kind of method and system of quick identification vehicle signal and parameter |
| CN109542419A (en) * | 2018-11-30 | 2019-03-29 | 深圳市英威腾电动汽车驱动技术有限公司 | A kind of method, system and the equipment of the exploitation of CAN message processing software |
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