CN107347101A - A kind of car networking CAN collecting methods - Google Patents
A kind of car networking CAN collecting methods Download PDFInfo
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- CN107347101A CN107347101A CN201710701211.1A CN201710701211A CN107347101A CN 107347101 A CN107347101 A CN 107347101A CN 201710701211 A CN201710701211 A CN 201710701211A CN 107347101 A CN107347101 A CN 107347101A
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- H—ELECTRICITY
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Abstract
The invention provides a kind of car networking CAN collecting methods, the DBC files and configuration file gathered first according to the collection project of body information generation body information；The configuration file is sent to car-mounted terminal by car networking background server；Car-mounted terminal is according to the body information data on configuration file data acquisition bus；Body information data group bag is generated into packet；By data packet back to car networking background server；Car networking background server will parse the packet, and obtain the body information.Strong adaptability of the present invention, the dependence to terminal is small, can improve the security of data, has the advantages of rapidly and efficiently obtaining body information, is operated without manual site, simple efficient and not error-prone.The configuration file of the present invention has versatility, dynamically can match different automobile types in a car networking system, can also meet the collection requirement of multichannel CAN interface in a vehicle, so that car networking system has very strong compatibility.
Description
Technical field
The present invention relates to a kind of car networking CAN collecting methods, belong to automobile CAN data acquisition technology field.
Background technology
Existing body information collection is mainly applied to automotive performance and monitored.Automobile in use, with traveling
Cheng Zengjia, there is phenomena such as reliability reduction, economy is deteriorated with fault rate increase.This change procedure of automobile is inevitable
, meet the rule of development, but if detected not in time, then automobile will go wrong in the process of moving.It is so existing
There is technology to be acquired acquisition body information to the data in CAN, to analyze automotive performance.
Prior art is that the body information in CAN is acquired for automotive performance analysis field, the car of collection
Body information is fixed, it is not necessary to change configuration file repeatedly, so prior art be configuration file is directly fixed in it is vehicle-mounted
In terminal.Prior art disposably to vehicle body data acquisition and uploads platform by fixed acquisition configuration file.
However, with the development of automotive engineering and car networking technology, vehicle complete vehicle network is formed and also become increasingly complex, automobile
All parts on automobile, controller, sensor are organically combined and form powerful modern cars by vehicle network.
Body information, which is gathered and integrated, is no longer simply applied to analysis automotive performance and failure, while also develops into based on car networking
Online vehicles information management.Body information becomes diversity, mutability, and body information collection can not simply regularly, disposably
Ground gathers body information, and should configure collection file in real time, and the vehicle body data of collection are handled, but prior art
Variation, the body information acquisition scheme of mutability are not occurred.
To sum up, prior art has the disadvantage that：1) mode of localized configuration information is stored in car-mounted terminal, is caused vehicle-mounted
The matching capacity of terminal and different vehicle reduces；2) fixed placement file collection body information, it is impossible to flexibly change collection project,
And more projects and change will be presented in practice as the development of car networking, body information collection project, fixed placement file
Acquisition mode can not meet the real demand often changed；3) artificial storage configuration file, operation inconvenience are needed.
The content of the invention
In view of the drawbacks described above of prior art, the technical problems to be solved by the invention are to provide a kind of car networking CAN
Collecting method, it is intended to which it is fixed to solve prior art arrangement file, it is impossible to flexibly the problem of change collection project；Together
When, according to the actual demand of collection vehicle body information project, custom configuration file, save network bandwidth；In addition, the present invention passes through clothes
Business device directly changes configuration file, is operated without manual site, improves car-mounted terminal and the agreement matching capacity of different vehicle, and
Whole process is simple, efficient and not error-prone.
The present invention is that technical scheme is used by solving its technical problem：Provide a kind of car networking CAN data acquisitions
Method, comprise the following steps：
Step S1, according to the collection project of body information, the DBC files and configuration file of generation body information collection；
Step S2, the configuration file is sent to car-mounted terminal by car networking background server by wireless network；
Step S3, described car-mounted terminal is according to the body information data on the configuration file data acquisition bus；
Step S4, according to group packet protocol, the body information data is packaged and generate packet；
Step S5, by the data packet back to the car networking background server；
Step S6, car networking background server will parse the packet, and obtain the body information.
Step S1 specifically includes procedure below：
The vehicle CAN agreement provided according to manufacturer, generate DBC files；
According to DBC file generated configuration files；The definition of each controller association message and signal in DBC is extracted first,
Including controller title, the message ID of controller message, parameter name, start bit, parameter bit length, syllable sequence, data type,
Yield value, bias, number range and unit；The related parameter of setting collection after extraction, including it is total where baud rate, signal
Whether line interface sequence number, signal, which need, uploads, and completes the generation of configuration file.
Step S3 specifically includes procedure below：The baud rate is extracted, sets data transmission bauds, sets controller message
Corresponding CAN interface sequence number；
The configuration file is handled, extraction frame ID, data start bit, bit length, syllable sequence, gain, offset, is obtained
Data in CAN on the frame ID；
The data value of body information parameters is parsed and calculated according to configuration file；
Repeat, until completing the extraction of all signal datas of configuration file, complete the body information data
Extraction.
In step S4, described group of packet protocol, refer to that the definition according to car networking system data transmission agreement packages.
In packet described in step S4, the identification code that MD5 values are configuration file is set；The MD5 values are for the service
Device verifies to the packet of passback, determines the unique corresponding relation between packet and configuration file.
Packet described in step S4 includes the signal list of fixation, and the signal list records need to be passed back to the car
The signal of networking background server, and order and the data type of each signal between signal；Step S6 specifically include with
Lower process：Packet is verified, determines that data packet format is correct according to the definition of packet by car networking background server,
Then body information data parsing is carried out one by one, and all body informations in packet are extracted according to signal list.
The fixed list information of each signal is not defined in packet described in the step S4, action is entered by configuration file
State is transmitted；Step S6 specifically includes procedure below：When car networking background server will carry out resolve packet, according in packet
Signal total number and each signal data type analytic signal data one by one；Then by extracting the MD5 values in packet,
Configuration file signal name list corresponding to inquiring；Finally, car networking background server passes through signal list and signal name
Parsing, storage and the displaying of data are completed in list, complete data parsing.
When profile information corresponding to car networking background server does not have MD5 values, car networking background server first to
Car-mounted terminal inquires the signal name list of current configuration file, and car-mounted terminal arranges the MD5 values and signal name of configuration file
Table is sent to server, car networking background server storage MD5 values and signal name list.
Also include step SA：Whether car networking background server monitoring third party sends collection request, and car networking backstage takes
Business device verifies third-party authority；If third party has the authority for obtaining request items, configuration text is generated according to request items
Part is sent to car-mounted terminal；If third party does not gather body information without the authority for obtaining request items.
The present invention is based on beneficial effect possessed by its technical scheme：
(1) because the vehicle of different manufacturer's production is different, CAN agreement is also different, including frame ID settings, number
A kind of car networking CAN collecting methods different according to type and byte number etc., that the application provides, are provided according to manufacturer
Vehicle CAN agreement, and by Vector Software Create DBC files, the advantage is that can directly and car enterprise research and development instrument
Docking, quickly generates DBC files, and the time is saved for complicated car networking application；
(2) a kind of car networking CAN collecting methods that the application provides, can be packaged using static mode, be
Will transmission signal data order and list fix, key in the signal name and host-host protocol in by configuration file
Signal name carry out correspondingly, the signal data after parsing carries out group by vehicle terminal software according to signal list and data type
Bag, and to server transport；
(3) a kind of car networking CAN collecting methods that the application provides, can also be packaged by dynamical fashion,
That is the CAN signal data title and order to be transmitted of not fixation, signal group bag is directly carried out by the definition of configuration file,
It is crucial according to configuration file the type of each signal data, length, numerical value be dynamically filled into packet, usefulness
It is car networking system is gathered different vehicle according to application requirement different data, is improved the compatibility of system；
(4) a kind of car networking CAN collecting methods that the application provides, car networking background server storage configuration file
MD5 values and the corresponding relation of each packet, it is ensured that, can also be correct even if having modified acquisition parameter list in gatherer process
Parsed and read, avoid data from being malfunctioned when extracting；
(5) the application provide a kind of car networking CAN collecting methods, server can also to third party's requests verification its
Authority, avoid body information from maliciously being obtained, protect the necessary privacy of car owner；
(6) a kind of car networking CAN collecting methods that the application provides, terminal strong adaptability, the dependence to terminal is small,
The advantages of with quick, effective acquisition body information, operated without manual site, it is simple, efficient and not error-prone；Pass through simultaneously
Car networking background server dynamically issues the CAN protocol profile of car-mounted terminal, enhances car-mounted terminal and vehicle
Matching capacity, make with a car-mounted terminal possess matching various ability.
Brief description of the drawings
Fig. 1 is the body information collecting flowchart schematic diagram of the embodiment of the invention；
Fig. 2 is the schematic diagram of the generation configuration file of the embodiment of the invention；
Fig. 3 is the body information collection rights management schematic diagram of the embodiment of the invention.
Embodiment
The invention will be further described with reference to the accompanying drawings and examples.
The invention provides a kind of car networking CAN collecting methods, reference picture 1, Fig. 2 and Fig. 3, are taken with car networking backstage
Exemplified by device collection vehicle of being engaged in mileage, speed, parking brake state, service brake status information, process is as follows：
Step S1, according to the collection project of body information, the DBC files and configuration file of generation body information collection；
Step 1: the vehicle CAN agreement provided according to manufacturer, passes through Vector Software Create DBC files：
The DBC files of CAN are as follows：
BS_:
BU_:myECU
BO_2566909442Message_1:8myECU
SG_ accumulated distances:0|32@1+(1,0)[0|0]"km"Vector__XXX
BO_2566844695Message_2:8myECU
SG_ speeds:8|16@1+(0.00390625,0)[0|0]"Km/h"Vector__XXX
SG_ parking brake states:2|2@1+(1,0)[0|0]""Vector__XXX
SG_ service brake states:4|2@1+(1,0)[0|0]""Vector__XXX
Step 2: according to DBC file generated configuration files；The configuration file is total for recording car-mounted terminal collection CAN
The body information of line, CAN sequence number, baud rate configuration, controller title, control where the configuration file includes controller
Device message and vehicle trouble messages configuration, controller message include message ID configurations and message data definition.
The generating process of configuration file is as follows：The definition of each controller association message and signal in DBC is extracted first.Bag
Include controller title, message ID, parameter name, start bit, parameter bit length, syllable sequence, data type, yield value, bias,
Number range, unit.Repeat, until completing the extraction of all signal definitions of configuration file.Then setting gathers correlation
EBI sequence number where parameter, including baud rate, signal, whether signal needs uploads.It is finally completed the life of configuration file
Into.
Wherein, 1) baud rate configures：
In the present embodiment, three tunnel CAN interfaces are shared.High-speed CAN bus interface is corresponded to respectively, middling speed CAN connects
Mouth, low speed CAN interface.This three tunnels CAN interface baud rate need to be respectively configured in baud rate configuration.Baud rate is according to reality
Full Vehicle System CAN signal transmission rate is set.In the present embodiment, configuration file is enumerated each road CAN and connect first
The optional baud rate of mouth, then setting high-speed CAN baud rates are 250Kbps, and middling speed CAN baud rates are 250Kbps, and low speed
The baud rate of CAN interface is 125Kbps.
2) the EBI sequence number configuration where signal：
Method by increasing each signal name prefix configures the CAN interface position where signal, high-speed CAN
EBI prefix is " HS ", and middling speed CAN interface prefix is " MS ", and low speed CAN interface prefix is " LS ", if necessary
Expansible more multichannel CAN prefix code name.For example " speed " signal in middling speed CAN interface, then signal name is revised as
" MS speeds ".
3) whether signal needs upload configuration：
If some signal needs to upload, increase on signal name " _ W " suffix, is otherwise only locally stored,
Without remote transmission.In the present embodiment, all signals will carry out remote transmission.
4) configuration file by DBC file generateds is as follows：
BS_:
BU_:myECU
BO_2566909442Message_1:8myECU
SG_MS accumulated distances _ W:0|32@1+(1,0)[0|0]"km"
BO_2566844695Message_2:8myECU
SG_MS speeds _ W:8|16@1+(0.00390625,0)[0|0]"Km/h"
SG_MS parking brakes state _ W:2|2@1+(1,0)[0|0]""
SG_MS service brakes state _ W:4|2@1+(1,0)[0|0]""
BA_DEF_"HSBaudrate"ENUM"50000","100000","125000","250000","500000","
1000000"；
BA_DEF_"MSBaudrate"ENUM"50000","100000","125000","250000","500000","
1000000"；
BA_DEF_"LSBaudrate"ENUM"50000","100000","125000","250000","500000","
1000000"；
BA_"HSBaudrate"3；
BA_"MSBaudrate"3；
BA_"LSBaudrate"2；
Step S2, the configuration file is sent to car-mounted terminal by car networking background server by wireless network.Network
The mode of transmission is varied, including GPRS, wifi, 3G, 4G cellular communications networks etc., in the present embodiment, car-mounted terminal
Pass through GPRS and server communication.
Step S3, described car-mounted terminal specifically includes according to the body information data on the configuration file data acquisition bus
Procedure below：
The baud rate configuration is extracted, data transmission bauds is set, sets CAN interface sequence number corresponding to controller message；
The configuration file is handled, extraction frame ID, data start bit, bit length, syllable sequence, gain, offset, is obtained
Data in CAN on the frame ID；
The data value of body information parameters is parsed and calculated according to configuration file；
Repeat, until completing the extraction of all signal datas of configuration file, complete the body information data
Extraction.
In the present embodiment, including：
1) car-mounted terminal parsing configuration file, the data transmission bauds of each CAN interface is set by baud rate；
2) car-mounted terminal gathers the message in the second tunnel CAN, in the message that ID is 2566909442, from data field
0bit start, extract 32bit, then according to the general analytic method of DBC signals, obtain accumulative mileage data.
3) car-mounted terminal gathers the message in the second tunnel CAN, in the message that ID is 2566844695, from data field
8bit start, extract 16bit, then according to the general analytic method of DBC signals, obtain vehicle speed data.
4) car-mounted terminal gathers the message in the second tunnel CAN, in the message that ID is 2566844695, from data field
2bit start, extract 2bit, then according to the general analytic method of DBC signals, obtain parking brake status data.
5) car-mounted terminal gathers the message in the second tunnel CAN, in the message that ID is 2566844695, from data field
4bit start, extract 2bit, then according to the general analytic method of DBC signals, obtain service brake status data.
6) parsing of all signal datas is completed by above-mentioned steps, obtains the body information in CAN.
It is noted that above-described " the general analytic method of DBC signals " is obtained according to following form：Meter
Syllable sequence, yield value and offset needed for calculating, then obtain integer value according to syllable sequence, are finally multiplied by yield value, plus inclined
Shifting amount obtains final signal numerical value.CAN message and signal format are defined as follows：
BO_CAN ID message names:Data field byte number ECU titles
SG_ signal names:Start bit | digit@syllable sequences data type (yield value, offset) [minimum value | maximum]
" unit "
In above-mentioned definition：
Syllable sequence is：0 represents motorolla, 1 represents intel.
Data type：+：Represent without symbol shaping；- representative has symbol shaping；2 represent single precision floating datum；3 represent double essences
Spend floating number.
Step S4, according to group packet protocol, the body information data is packaged and generate packet.Described group of bag association
View, refer to that the definition according to car networking system data transmission agreement packages.Data volume in the packet of the present embodiment is determined
It is adopted as shown in table 1：
Data volume definition in the packet of table 1
Data type therein is as shown in table 2：
The data type of table 2
Car-mounted terminal gathers the data in CAN according to configuration file, and data are packaged, in data group bag
Data order is corresponding with the order in configuration file.In the present embodiment, the data volume composing method in packet is as follows：
It is unique to characterize data bag and configuration file such as the MD5 values that table 1BYTE 1 to BYTE 16 is configuration file
Corresponding relation；
If the BYTE17 of table 1 is to BYTE18 bytes, because data total number is 4, it is hexadecimal to insert BYTE 17
0x00, BYTE 18 is hexadecimal 0x04；
Such as the BYTE19 bytes of table 1, because accumulative mileage is transmitted from single precision floating datum, hexadecimal number is inserted
0x01.Then from 20 bytes to 23 bytes, corresponding 4 bytes 16 after accumulative mileage value is converted to single precision floating datum is inserted and are entered
Data processed.
Such as the bytes of BYTE 24 of table 1, because speed is transmitted from single precision floating datum, hexadecimal number is inserted
0x01.Then from 25 bytes to 28 bytes, insert vehicle speed value and be converted to corresponding 4 byte hexadecimal numbers after single precision floating datum
According to.
Such as the bytes of BYTE 29 of table 1, because parking brake state is transmitted from single precision floating datum, hexadecimal is inserted
Number 0x01.Then 30 bytes to 33 bytes, insert parking brake state value and be converted to 4 byte hexadecimal corresponding to single precision floating datum
Data.
Such as the bytes of BYTE 34 of table 1, because service brake state is transmitted from single precision floating datum, hexadecimal is inserted
Number 0x01.Then 35 bytes to 38 bytes, insert parking brake state value and be converted to 4 byte hexadecimal corresponding to single precision floating datum
Data.
By above-mentioned steps, the group bag of data volume in packet is completed.Vehicle terminal software enters one according to host-host protocol
Step completes the group bag of whole packet.
The embodiment is only preferred embodiment, and in practical operation, group bag data form slightly has with this group of bag data form
Difference, but it is no more than inventive concept, it should regard as falling into the scope of the present invention.Such as the order using data and list
Fixed group packet mode.
It is noted that in the present embodiment, data back is that timing returns, preferably 10 seconds transmission primarieses when normal,
When vehicle breaks down, 1 second transmission primaries is brought up to.
Step S5, by the data packet back to the car networking background server.
Server is delivered a packet to, the identification code that MD5 values are configuration file is set；The MD5 values are for the clothes
Business device verifies to the packet of passback, determines the unique corresponding relation between packet and configuration file.MD5 values are used
In configuration file corresponding to server matches, to obtain the list of signal and order, and then complete the correct parsing of data, deposit
Storage and displaying.
Obviously in this step, it is related to the return data group bag of driving safety relative to the administrative return data group for monitoring class
Right of the bag with preferential upload server.
Step S6, car networking background server will parse the packet, and obtain the body information.
A kind of embodiment is：Packet described in step S4 includes the signal list of fixation, the signal list records
Need to be passed back to the signal of the car networking background server, and order and the data type of each signal between signal；
Step S6 specifically includes procedure below：Car networking background server is verified packet according to the definition of packet, it is determined that
Data packet format is correct, then carries out body information data parsing one by one, and all cars in packet are extracted according to signal list
Body information.
Another embodiment is：The fixed list information of each signal is not defined in packet described in the step S4,
Dynamic transmission is carried out by configuration file；Step S6 specifically includes procedure below：Car networking background server will carry out packet
During parsing, the data type of signal total number and each signal in packet analytic signal data one by one；Then pass through
The MD5 values in packet are extracted, inquire corresponding configuration file signal name list；Finally, car networking background server leads to
Cross signal list and parsing, storage and the displaying of data are completed in signal name list, complete data parsing.In the present embodiment,
The MD5 values of 16 bytes are extracted first, obtain the corresponding relation between packet and configuration file, and then obtain signal name row
Table, i.e. 4 signals are respectively：Accumulative mileage, speed, parking brake state, service brake state.Then the 19th byte is parsed, is the discovery that list
Accuracy floating-point number, so 20 to 23 byte datas of extraction, according to single precision floating datum recovering signal data, obtain actual add up
Mileage value.By above-mentioned similar approach, the value of speed, parking brake state and service brake state is obtained successively, is then store in server
In, complete the acquisition of body information.
When profile information corresponding to car networking background server does not have MD5 values, car networking background server first to
Car-mounted terminal inquires the signal name list of current configuration file, and car-mounted terminal arranges the MD5 values and signal name of configuration file
Table is sent to server, car networking background server storage MD5 values and signal name list.
A kind of car networking CAN collecting methods provided by the invention, may also include step SA：Car networking background server
Whether monitoring third party sends collection request, and car networking background server verifies third-party authority；Obtained if third party has
The authority of request items, then generate configuration file according to request items and send to car-mounted terminal；If third party is without acquisition claims
Purpose authority, then do not gather body information.
Third party can obtain body information to server application；For example, travelled on road, rear car is in order to avoid touching
Hit, the body informations such as preceding vehicle speed, front truck braking conditions, the urgent lane change of front truck can be obtained, obtaining this aspect information in time has
Help the generation that cuts down traffic accidents.In another example traffic police can obtain overspeed of vehicle, overweight information, in case administrative need.In another example ring
Guarantor department can be with collection vehicle exhaust emissions information.Certainly, for different third parties, there are different power to body information collection
Limit, server need to be verified to authority.
It is noted that the present invention is the CAN data acquisitions based on car networking, application field is not limited to prior art
Extract body information and applied to analysis automotive performance, detect the Vehicular system failure caused by vehicle service life.The present invention's
Application field is following car networking technology, in car networking technology, each automobile be all can be communicated, information exchange.
Existing car networking anti-collision technique be by judging that distance or prediction vehicle distances carry out anticollision between vehicle, and in the present invention,
Can be by detecting body information, such as speed, braking state, when emergency brake occurs, speed, brake in vehicle CAN bus
Car information avoids chasing after caused by front truck emergency brake by server, server notice or control rear automobile speed or steering
Tail accident.And actually vehicle CAN information gathering can be also used for scene in car networking field.Scene 1, as being provided with automobile
Vehicle-mounted weighing sensor is simultaneously connected with CAN, and traffic police can call the weighing information of automobile to server application, check vapour
Whether car is overweight.Scene 2, environmental administration is acquired to vehicle exhaust, and environmental administration configures vehicle exhaust to server application
Configuration file is detected, and the configuration file is sent to automobile to be detected, obtains automobile emission gas analyzer report, environmental administration
Associated vehicle can be punished or required according to this report to rectify and improve.Beneficial effect is, obtains in time on road with driving
Body information, avoid traffic accident；Executive supervision department monitoring travel condition of vehicle, overweight state, tail gas pollution situation, are carried out
Relevant item is supervised, and is advantageous to safeguard personal and public interest.
Preferred embodiment of the invention described in detail above.It should be appreciated that one of ordinary skill in the art without
Creative work can is needed to make many modifications and variations according to the design of the present invention.Therefore, all technologies in the art
Personnel are available by logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Technical scheme, all should be in the protection domain being defined in the patent claims.
Claims (9)
1. a kind of car networking CAN collecting methods, it is characterised in that comprise the following steps：
Step S1, according to the collection project of body information, the DBC files and configuration file of generation body information collection；
Step S2, the configuration file is sent to car-mounted terminal by car networking background server by wireless network；
Step S3, described car-mounted terminal is according to the body information data on the configuration file data acquisition bus；
Step S4, according to group packet protocol, the body information data is packaged and generate packet；
Step S5, by the data packet back to the car networking background server；
Step S6, car networking background server will parse the packet, and obtain the body information.
2. car networking CAN collecting methods according to claim 1, it is characterised in that：Step S1 specifically includes following
Process：
The vehicle CAN agreement provided according to manufacturer, generate DBC files；
According to DBC file generated configuration files；The definition of each controller association message and signal in DBC is extracted first, including
Controller title, the message ID of controller message, parameter name, start bit, parameter bit length, syllable sequence, data type, gain
Value, bias, number range and unit；Set after extraction and gather related parameter, including the bus where baud rate, signal connects
Mouthful sequence number, whether signal needs uploads, and completes the generation of configuration file.
3. car networking CAN collecting methods according to claim 2, it is characterised in that：Step S3 specifically includes following
Process：
The baud rate is extracted, sets data transmission bauds, sets CAN interface sequence number corresponding to controller message；
The configuration file is handled, extraction frame ID, data start bit, bit length, syllable sequence, gain, offset, it is total to obtain CAN
Data on line on the frame ID；
The data value of body information parameters is parsed and calculated according to configuration file；
Repeat, until completing the extraction of all signal datas of configuration file, complete carrying for the body information data
Take.
4. car networking CAN collecting methods according to claim 1, it is characterised in that：In step S4, described group of bag association
View, refer to that the definition according to car networking system data transmission agreement packages.
5. car networking CAN collecting methods according to claim 4, it is characterised in that：In packet described in step S4,
The identification code that MD5 values are configuration file is set；The MD5 values carry out school for the server to the packet of passback
Test, determine the unique corresponding relation between packet and configuration file.
6. car networking CAN collecting methods according to claim 5, it is characterised in that：In packet described in step S4
Including fixed signal list, the signal list records need to be passed back to the signal of the car networking background server, and
The data type of order and each signal between signal；Step S6 specifically includes procedure below：Car networking background server root
According to the definition of packet, packet is verified, determines that data packet format is correct, then carries out body information data solution one by one
Analysis, all body informations in packet are extracted according to signal list.
7. car networking CAN collecting methods according to claim 5, it is characterised in that：Data described in the step S4
The fixed list information of each signal is not defined in bag, dynamic transmission is carried out by configuration file；Step S6 specifically includes following
Process：When car networking background server will carry out resolve packet, signal total number and each signal in packet
Data type analytic signal data one by one；Then by extracting the MD5 values in packet, corresponding configuration file signal is inquired
Name list；Finally, car networking background server by signal list and signal name list complete the parsings of data, storage and
Displaying, complete data parsing.
8. car networking CAN collecting methods according to claim 7, it is characterised in that：When car networking background server
When not having profile information corresponding to MD5 values, car networking background server first inquires current configuration file to car-mounted terminal
The MD5 values of configuration file and signal name list are sent to server by signal name list, car-mounted terminal, and car networking backstage takes
Business device storage MD5 values and signal name list.
9. car networking CAN collecting methods according to claim 1, it is characterised in that：Also include step SA：Car networking
Whether background server monitoring third party sends collection request, and car networking background server verifies third-party authority；If the 3rd
Side has the authority for obtaining request items, then generating configuration file according to request items sends to car-mounted terminal；If third party without
The authority of request items is obtained, then does not gather body information.
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| CN107347101B (en) | 2018-05-04 |
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