CN107347101B - A kind of car networking CAN collecting methods - Google Patents
A kind of car networking CAN collecting methods Download PDFInfo
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- CN107347101B CN107347101B CN201710701211.1A CN201710701211A CN107347101B CN 107347101 B CN107347101 B CN 107347101B CN 201710701211 A CN201710701211 A CN 201710701211A CN 107347101 B CN107347101 B CN 107347101B
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- H—ELECTRICITY
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- H—ELECTRICITY
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Abstract
The present 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 data packet；By data packet back to car networking background server；Car networking background server will parse the data packet, and obtain the body information.The present invention is adaptable, and the dependence to terminal is small, can improve the security of data, has the advantages that rapidly and efficiently to obtain 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 monitors.Automobile in use, with traveling
, there is phenomena such as reliability reduction, economy is deteriorated with failure rate increase in Cheng Zengjia.This change procedure of automobile is inevitable
, meet the rule of development, but if detected not in time, 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 bus, to analyze automotive performance.
The prior art is that the body information in CAN bus 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 the prior art be configuration file is directly fixed in it is vehicle-mounted
In terminal.The 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 cannot 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 the prior art
Variation, the body information acquisition scheme of mutability are not occurred.
To sum up, the 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 is needed, it is inconvenient.
The content of the invention
In view of the drawbacks described above of the 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, saves 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 solution is used by solving its technical problem：Provide a kind of car networking CAN data acquisitions
Method, comprises 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 data packet；
Step S5, by the data packet back to the car networking background server；
Step S6, car networking background server will parse the data packet, and obtain the body information.
Step S1 specifically includes procedure below：
The vehicle CAN bus agreement provided according to manufacturer, generates 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；Setting gathers relevant parameter after extraction, including 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, obtain
Data in CAN bus 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, refers to that the definition according to car networking system data transmission agreement packages.
In data packet described in step S4, the identification code that MD5 values are configuration file is set；The MD5 values are used for the service
Device verifies the data packet of passback, determines the unique corresponding relation between data packet and configuration file.
Data 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：Data packet is verified, determines that data packet format is correct according to the definition of data packet by car networking background server,
Then body information data parsing is carried out one by one, and all body informations in data packet are extracted according to signal list.
The fixed list information of each signal is not defined in data packet described in the step S4, by configuration file into action
State is transmitted；Step S6 specifically includes procedure below：When car networking background server will carry out resolve packet, according in data packet
Signal total number and each signal data type analytic signal data one by one；Then by extracting the MD5 values in data packet,
Inquire corresponding configuration file signal name list；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 car networking background server does not have the corresponding profile information of 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.
Further 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 solution：
(1) since the vehicle of different manufacturer's production is different, CAN bus 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, provide according to manufacturer
Vehicle CAN bus 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 transport protocol in by configuration file
Signal name corresponded to, the signal data after parsing is carried 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,
The CAN bus signal data title and order to be transmitted is not fixed, 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 data 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
The correspondence of MD5 values and each data 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 malfunctioning 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, avoids body information from maliciously being obtained, and protects the necessary privacy of car owner；
(6) a kind of car networking CAN collecting methods that the application provides, terminal is adaptable, and the dependence to terminal is small,
There is quick, effective acquisition body information, operated without manual site, it is simple, efficient and not error-prone；Pass through at the same time
Car networking background server dynamically issues the CAN bus 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 present invention provides a kind of car networking CAN collecting methods, with reference to Fig. 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 bus agreement provided according to manufacturer, passes through Vector Software Create DBC files：
The DBC files of CAN bus 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 bus 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 collection is relevant
Bus interface 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 bus 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 bus signal transmission rate is set.In the present embodiment, configuration file is enumerated each road CAN bus and is 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 bus interface sequence number configuration where signal：
Method by increasing each signal name prefix configures the CAN interface position where signal, high-speed CAN
Bus interface prefix is " HS ", and middling speed CAN interface prefix is " MS ", and low speed CAN interface prefix is " LS ", if necessary
The prefix code name of expansible more multichannel CAN.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 " suffix of _ W ", 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 is specifically included according to the body information data on the configuration file data acquisition bus
Procedure below：
The baud rate configuration is extracted, sets data transmission bauds, the corresponding CAN interface sequence number of setting controller message；
The configuration file is handled, extraction frame ID, data start bit, bit length, syllable sequence, gain, offset, obtain
Data in CAN bus 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 bus, 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 bus, 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 bus, 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 bus, 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 bus.
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 data packet.Described group of bag association
View, refers to that the definition according to car networking system data transmission agreement packages.Data volume in the data packet of the present embodiment is determined
It is adopted as shown in table 1：
Data volume definition in 1 data packet of table
Data type therein is as shown in table 2：
2 data type of table
Car-mounted terminal gathers the data in CAN bus according to configuration file, and packages to data, in data group bag
Data order is corresponding with the order in configuration file.In the present embodiment, the data volume composing method in data 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
Correspondence；
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 selects single precision floating datum to be transmitted, hexadecimal number is inserted
0x01.Then from 20 bytes to 23 bytes, insert accumulative mileage value be converted to after single precision floating datum corresponding 4 byte 16 into
Data processed.
Such as 24 bytes of BYTE of table 1, because speed selects single precision floating datum to be transmitted, hexadecimal number is inserted
0x01.Then from 25 bytes to 28 bytes, insert vehicle speed value and be converted to corresponding 4 byte hexadecimal number after single precision floating datum
According to.
Such as 29 bytes of BYTE of table 1, because parking brake state selects single precision floating datum to be transmitted, hexadecimal is inserted
Number 0x01.Then 30 bytes to 33 bytes, insert parking brake state value and are converted to corresponding 4 byte hexadecimal of single precision floating datum
Data.
Such as 34 bytes of BYTE of table 1, because service brake state selects single precision floating datum to be transmitted, hexadecimal is inserted
Number 0x01.Then 35 bytes to 38 bytes, insert parking brake state value and are converted to corresponding 4 byte hexadecimal of single precision floating datum
Data.
By above-mentioned steps, the group bag of data volume in data packet is completed.Vehicle terminal software is according to transport protocol into one
Step completes the group bag of whole data 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 used for the clothes
Business device verifies the data packet of passback, determines the unique corresponding relation between data packet and configuration file.MD5 values are used
In the corresponding configuration file of server matches, to obtain the list of signal and order, and then complete the correct of data and parse, deposit
Storage and displaying.
Obviously in this step, it is related to the return data group bag of driving safety relative to the return data group of administrative monitoring class
Right of the bag with preferential upload server.
Step S6, car networking background server will parse the data packet, and obtain the body information.
A kind of embodiment is：Data 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：Data packet is verified, determined according to the definition of data packet by car networking background server
Data packet format is correct, then carries out body information data parsing one by one, and all cars in data packet are extracted according to signal list
Body information.
Another embodiment is：The fixed list information of each signal is not defined in data 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 data packet
During parsing, the data type of signal total number and each signal in data packet analytic signal data one by one；Then pass through
The MD5 values in data 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 correspondence between data 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 car networking background server does not have the corresponding profile information of 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 verify authority.
It is noted that the present invention is the CAN data acquisitions based on car networking, application field is not limited to the 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 bus, and traffic police can call the weighing information of automobile to server application, check vapour
Whether car is overweight.Scene 2, environmental protection administration is acquired vehicle exhaust, and environmental protection 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 protection 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, carry out
Relevant item is supervised, and is conducive to safeguard personal and public interest.
Preferred embodiment of the invention described in detail above.It should be appreciated that those of ordinary skill in the art without
Need creative work to conceive according to the present invention and make many modifications and variations.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 solution, all should be in the protection domain being defined in the patent claims.
Claims (5)
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 data packet；Described group of packet protocol, is
Refer to and package according to the definition of car networking system data transmission agreement；In the data packet, MD5 values are set for configuration file
Identification code；The MD5 values verify the data packet of passback for the server, determine data packet and configuration file
Between unique corresponding relation；The fixed list information of each signal is not defined in the data packet, is carried out by configuration file
Dynamic transmission；
Step S5, by the data packet back to the car networking background server；
Step S6, car networking background server will parse the data packet, and obtain the body information, specifically include following mistake
Journey：
When car networking background server will carry out resolve packet, the number of signal total number and each signal in data packet
According to type analytic signal data one by one；Then by extracting the MD5 values in data packet, corresponding configuration file signal name is inquired
Claim list；Finally, car networking background server completes parsing, storage and the exhibition of data by signal list and signal name list
Show, complete data parsing.
2. car networking CAN collecting methods according to claim 1, it is characterised in that：Step S1 specifically includes following
Process：
The vehicle CAN bus agreement provided according to manufacturer, generates 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 relevant 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, the corresponding CAN interface sequence number of setting 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：When car networking background server
When not having the corresponding profile information of MD5 values, car networking background server is first to car-mounted terminal inquiry current configuration file
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.
5. car networking CAN collecting methods according to claim 1, it is characterised in that：Further 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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