CN102183945B - Multifunctional remote fault diagnosis system for electric control automobile - Google Patents
Multifunctional remote fault diagnosis system for electric control automobile Download PDFInfo
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Abstract
The invention relates to a multifunctional remote fault diagnosis system for an electric control automobile. The multifunctional remote fault diagnosis system comprises a remote fault diagnosis service center, PC (Personal Computer) diagnosis client sides and a diagnosis communication device. The remote fault diagnosis service center serves as a key of the system and is mainly used for realizing an automobile fault diagnosis network management function and an automobile remote fault diagnosis assistance function; the PC diagnosis client sides are mainly used for providing specific automobile diagnosis application functions and remote diagnosis interfaces for users with different rights through human-computer interaction interfaces; and the diagnosis communication device is mainly used for realizing the data communication between the PC diagnosis client sides and a vehicle-mounted network and providing diagnosis data service for upper applications. By means of the multifunctional remote fault diagnosis system, with the remote fault diagnosis service center as a core and all PC diagnosis client sides as nodes, an automobile fault diagnosis network is established; automobile diagnosis data sharing is realized by means of the diagnosis communication device; multifunctional automobile remote fault assistance and fault elimination help can be provided; automobile fault information is subjected to statistic analysis; and a reliable automobile quality report is provided for an automobile manufacturer.
Description
Technical field
The invention belongs to the automobile failure diagnosis technical field, particularly a kind of multi-functional automatically controlled vehicle remote fault diagnosis system.
Background technology
The development of auto electronic control technology, improve vehicle economy, dynamic property, security, the feature of environmental protection, comfortableness and handling in, make the structure of Auto Electronic Controlled System become increasingly complex, also increasingly high to the requirement of vehicle fault diagnosis system.Maintenance technician and the expert who also causes simultaneously following the tracks of and grasp the automotive field correlation technique be scarcity more and more, and the related personnel can not be trained and technical support timely, can not satisfy the professional requirement of each network of maintenance and repair to the maintenance technician.Electronic product proportion in integral vehicle cost is commonly 23%～30% at present; On high-grade limousine, account for 50%～60% especially; And the innovative technology of automobile 70% all concentrates on above the automotive electronics, and the development of car industry is the applying electronic control technology more.Many traditional method for diagnosing faults and diagnostic device are in the development that all is difficult to adapt to the Hyundai Motor technology aspect the sharing of the convenience of reliability, the use of diagnosis and data.Fault how to diagnose Auto Electronic Controlled System fast and accurately is a great problem that current automobile maintenance industry faces.To this situation; In the performance history of ECU, increased corresponding fault self-diagnosis system; Can not only in the vehicle operating process, constantly monitor the ruuning situation of each ingredient of electronic control system; Can also detect the most of fault in the electronic control system, and with the stored in form of DTC in the storer of electronic control unit, so not only can guarantee the cruising of vehicle; Also help the maintenance of maintenance personal, to realize to the online of automobile or off-line fault diagnosis to vehicle and electronic control system.
OBD (On-Board Diagnostic, vehicle-mounted self-diagnosis) system originates from the U.S. of the eighties in 20th century, is mainly used in monitor vehicle emission control systems in use.In the actual use of vehicle, pass through the deterioration and the out-of-control condition of monitoring and emission control associated components; The abnormal conditions that in time emission control systems on the vehicle occurred are reminded the human pilot inspection and maintenance through lighting malfunction indicator lamp, guarantee that the emission control systems of vehicle is in proper working order.Simultaneously automobile fault information is stored in the storer of controller, through read failure sign indicating number in the corresponding diagnostic device slave controller, the maintenance technician can confirm failure cause and parts fast and accurately according to the definition and the prompting of DTC.Since OBD in 2005 appeared in the statutory standard of China first as Compulsory Feature since, country put into effect multinomial standard again in succession and it is carried out perfect, has promoted the development of Chinese automobile OBD technology.
Using fault detection system for automobile in the market is to be the hand-held diagnostic equipment on basis with the code reader mostly; Utilize the OBD diagnose interface that In-vehicle networking is diagnosed; The result is presented on the LCD screen, and diagnostic data is kept in the storer, is aided with servicing manual again and accomplishes the vehicle failure eliminating.Mainly there is following defective in it: 1. diagnostic instrumentation system is fixed, and system extension upgrading or program change be difficulty relatively; 2. be based upon on the embedded system, processor performance is lower, and equipment operation speed is slow and function is comparatively simple; 3. system memory space is limited, can not adapt to multi-vehicle-type, multiple ECU refreshes demand; 4. need to point out concrete fault, can not provide intelligentized diagnosis to help by servicing manual; 5. comprehensive reliable diagnostic historical data can't be provided, practice thrift the maintenance technician and search fault-time; 6. lack network support efficiently, shared diagnostic data is abundant inadequately, and remote expert is in time assisted difficulty.This shows current maintenance mode with machine-processed, the difficult diagnostic requirements that adapts to following complicacy, intellectuality and remote diagnosis.
Summary of the invention
The objective of the invention is to be directed against many-sided problems that exist such as the orthodox car fault diagnosis not can solve in the region, time, efficient; And a kind of multi-functional automatically controlled vehicle remote fault diagnosis system is proposed; The realization remote failure is got rid of; Shorten the after sale service time, practice thrift after service cost, improve the after sale service satisfaction of client the automobile business men.
For realizing above-mentioned purpose, the present invention adopts following technical measures to realize.
Said multifunctional comprehensive type electronic automobile fault diagnosis system is made up of deagnostic communication device, three parts of PC diagnostic client and remote fault diagnosis service centre.
1, remote fault diagnosis service centre: management automobile failure diagnosis network; The service functions such as statistics and inquiry of management, the automobile fault information of intelligent diagnostics and help, the automobile failure diagnosis specialists meeting of the sharing of upgrading, remote diagnosis data, the remote failure of deagnostic communication device and PC diagnostic client are provided, and said remote fault diagnosis service centre is become with database servers group by diagnosis management server, diagnosis helping service device.
1.1, the diagnosis management server: comprise diagnostic system authority management module, diagnostic network administration module, diagnostic system updating and management module and car fault diagnosis statistical analysis module:
1.1.1, the System Privileges administration module: be the legitimate right of protection system, authentication of PC diagnostic client and correlation function mandate be provided;
1.1.2, the diagnostic network administration module: the deagnostic communication network is set up in responsible processing, makes things convenient for the long-range access of each legal PC diagnostic client;
1.1.3, diagnostic system updating and management module: be responsible for monitoring PC diagnostic client and deagnostic communication device software version and also download be provided, supervise the user to upgrade in time;
1.1.4, the car fault diagnosis statistical analysis module: be responsible for the vehicle medical record information is carried out statistical study, be the basis with time and distance travelled number, the reliability that car mass is provided for the automobile business men is with reference to report.
1.2, diagnosis helping service device comprises automobile failure diagnosis expert system module, maintenance expert assistance module, ECU refresh module and diagnosis help module:
1.2.1, the automobile failure diagnosis expert system module: through dual mode is that long-range PC diagnostic client is offered help; With the expertise database is that the basis is carried out reasoning and pointed out failure cause, is that the basis provides similar case history for PC diagnostic client maintenance technician or maintenance expert reference with the vehicle database of case history;
1.2.2 maintenance expert assistance module: be responsible for literal, picture, voice, video mode, the convenient for maintaining expert is to far-end maintenance technician's technological guidance;
1.2.3, the ECU refresh module: the main comparison client information of vehicles of being responsible for, select suitable ECU refreshing file to download for Terminal Server Client;
1.2.4 diagnosis help module: be the basis to help database,, help the user to solve the actual vehicle failure problems for the user provides substantial diagnosis help document.
1.3, database server comprises user rights database, edition data storehouse, the vehicle database of case history, ECU refresh, expertise database, helps database:
1.3.1, user rights database: storage user and authority information thereof;
1.3.2, the edition data storehouse: store corresponding PC diagnostic client and diagnostic device version information;
1.3.3, the vehicle database of case history: store each vehicle medical record information that dispatches from the factory;
1.3.4, the ECU refresh: storage ECU refreshing file and this document concern with the manufacturing match information;
1.3.5, the expertise database: the expression of storage automobile failure diagnosis expert system expertise electronization;
1.3.6, help database: storage failure helps data, comprises fault detail description, fault signature, fault interlock circuit figure, fault clearance way.
2, PC diagnostic client: be connected with the deagnostic communication device; As the Diagnosis Application layer; Mainly pass through human-computer interaction interface; For the different rights user provides concrete vehicle diagnosis application function and remote diagnosis interface, can realize basic diagnosis through the deagnostic communication device to vehicle failure, form by human-computer interaction module, safety control module, Diagnosis Application module, data management module, remote diagnosis module, diagnosis help module, software upgrading module.
2.1, human-computer interaction module: for the user provides software operation interface and Presentation Function; Realize system operational parameters being set and selecting each Diagnosis Application function through mouse or keyboard operation interface, diagnostic result is presented on the display with text, tabulation and three kinds of modes of curve so that the checking of maintenance technician or expert personnel.
2.2, safety control module: encryption, decrypting process when being responsible for deagnostic communication device or internet communication prevent other people illegal wiretapping; Also be responsible for the control of authority of software systems simultaneously, distinguish user class and open difference in functionality.
2.3, the Diagnosis Application module: be based upon on ISO14230, ISO15765, the SAE J1939 Diagnosis Application layer protocol basis; Accept the selection of human-computer interaction module or remote diagnosis module, send concrete diagnostic function order to the deagnostic communication device according to the regulation of diagnosing protocol.
2.4, data management module: be responsible for the data management of PC diagnostic client, comprise the collection of vehicle diagnostics medical record information, temporary and management, and be uploaded to remote diagnosis service centre through the remote diagnosis module; Wherein the vehicle diagnostics medical record information comprises VI N sign indicating number, license plate number, maintenance website, maintenance technician, servicing time, DTC, freeze frame, data stream numbering, diagnostic result, maintenance history, maintenance result.
2.5, the remote diagnosis module: through socket the PC diagnostic client is inserted vehicle remote fault diagnosis network as node; Under the help of the diagnosis helping service device of remote fault diagnosis service centre; Realize the remote diagnosis data sharing, work in coordination with the fault automobile is diagnosed.
2.6, the diagnosis help module: on local and remote assistance Basis of Database; Comprise fault detail description, fault signature, fault interlock circuit figure, fault clearance way relevant information for the maintenance technician provides, the fault automobile is done detailed fault analysis to the convenient for maintaining technician and fault is got rid of.
2.7, the software upgrading module: the software program of be responsible for upgrading in time PC diagnostic client and deagnostic communication device, revise the current version software error, in time replenish the new model diagnosing protocol, comprise that software version comparison, redaction download and installation function.
3, deagnostic communication device: mainly realize communication Protocol Conversion and data transmission between diagnostic software and the In-vehicle networking, form by main control module, power module, communication module, program curing refresh module.
3.1, main control module: with the single-chip microcomputer is core, and the normal operation of each system of control deagnostic communication device comprises the switching of deagnostic communication device communication pattern, the selection of diagnosing protocol, the buffer memory of data and transmission control etc.
3.2 power module: be meant through certain power-switching circuit, convert the power supply on vehicle of vehicle interior into each module of deagnostic communication device required working power; Monitor the abnormity of power supply situation simultaneously and in time take safeguard measure, to guarantee the security of deagnostic communication device.
3.3 communication module: mainly comprise the communication of PC diagnostic client and communicating by letter of In-vehicle networking, link to each other with bluetooth, realize the wired or wireless data transmission of deagnostic communication device and PC diagnostic client with PC diagnostic client computer USB, serial ports; Be connected with In-vehicle networking then based on diagnosing protocol ISO14230, ISO15765, the SAE J1939 of K line and CAN bus, realize that deagnostic communication device and respective physical layers, data link layer and the network layer data transmission of In-vehicle networking control.
3.4, the program curing refresh module: mainly be responsible for the program updating of main control chip, the object code file after will compiling through this module downloads in the FLASH memory block of main control chip.
The invention has the beneficial effects as follows:
1, the present invention has used the vehicle remote fault diagnosis technology, and this method has been broken away from the restriction of vehicle diagnosis region and real-time, practices thrift after service cost, improves after sale service efficient.
2, the present invention is based on internet platform, can utilize the sharing characteristic of network, the realization system upgrades in time and expands, to improve the trouble diagnosibility of diagnostic system.
3, the present invention is the basis with the vehicle remote fault diagnosis network of design certainly; Intelligent guidance of expert system and simulation maintenance expert on-the-spot guidance dual mode are provided; Diagnose help for the legal diagnostic client that inserts diagnostic network provides, improved system diagnostics and helped ability.
4, the present invention provides two kinds of mode of operations: under the networking pattern, can realize the vehicle remote fault diagnosis through the internet, intelligent diagnosis Assistance And Instruction is provided; Under the single cpu mode, can directly diagnose, assist the maintenance technician to fix a breakdown through PC diagnostic client and deagnostic communication device to vehicle.
5, diagnostic client software of the present invention is based on the PC platform; No matter be that personal user or maintenance website can utilize existing P C resource, only need extra purchase deagnostic communication device and legal authorization, and can constantly upgrade by network; Have cost and service advantage, have considerable social value.
6, the present invention is by shared network; Set up automobile failure diagnosis case history storehouse; Can supply maintenance technician or maintenance expert to check, also can carry out analyzing and processing, for the research and development and the manufacturing of automobile business men provides reference frame through the car fault diagnosis statistical analysis module; In time find the Automobile Design defective, improve and produce vehicle performance.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is networking pattern embodiment 1 synoptic diagram of the present invention;
Fig. 3 is single cpu mode embodiment 2 synoptic diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing and instance the present invention is described further, obvious said instance only is a part of embodiment of the present invention, rather than whole embodiment, so said embodiment should not be construed as limitation of the present invention.
A kind of multi-functional automatically controlled vehicle fault diagnosis system has two kinds of mode of operations: under the networking pattern, can realize the vehicle remote fault diagnosis through the internet, intelligent diagnosis Assistance And Instruction is provided; Under the single cpu mode, can directly diagnose, assist the maintenance technician to fix a breakdown through PC diagnostic client and deagnostic communication device to vehicle.
When a kind of multi-functional automatically controlled vehicle remote fault diagnosis system and method were in the networking diagnostic mode, the PC diagnostic client can be obtained remote diagnosis with multimode through the diagnostic network that makes up and assist, and its workflow is as shown in Figure 2:
201, remote diagnosis.
202, PC diagnostic client network sends the diagnostic network request of landing automatically in the situation that exists network to connect.
203, the diagnostic network administration module inserts the PC diagnostic client and asks to verify, confirms whether it is validated user and authority thereof;
204, authentication error, the disabled user inserts and directly withdraws from diagnosis;
205, diagnostic expert system obtains the associated vehicle diagnostic data from the PC diagnostic client, carries out reasoning relatively, and intelligent specified fault reason provides and diagnoses help;
206, judge whether diagnostic expert system solves the current failure problems of PC diagnostic client, in this way, then solve concrete fault to 213; As not, get into 207 request maintenance experts further help is provided;
207, the maintenance technician is through the PC diagnostic client, to more senior network of maintenance and repair maintenance expert or automobile business men maintenance expert request diagnostic assistance;
208, the diagnostic network administration module is that maintenance technician's the PC diagnostic client and the PC diagnostic client of maintenance expert are set up the correspondence mappings relation, and through NAT through-transmission technique, the end-to-end connection of setting up two clients;
209, maintenance technician and maintenance expert be through literal, picture, voice, visual form shared data, and provide and diagnose help;
210, judge whether current maintenance expert solves the current failure problems of PC diagnostic client, in this way, then solve concrete fault to 213; As not, get into the several maintenance experts of 211 requests further help is provided;
211, fail to accomplish under the situation of diagnosis 209, utilize diagnostic network to invite several experts to diagnose jointly;
212, service centre's maintenance expert assistance module is shared current diagnostic data, coordinates multidimensional and repaiies the technological guidance of expert to the far-end maintenance technician;
213, solve concrete fault;
214, deposit diagnostic result in database;
215, diagnosis finishes.
When a kind of multi-functional automatically controlled vehicle remote fault diagnosis system and method were in single cpu mode, workflow was as shown in Figure 3:
301, begin diagnosis, through the OBD interface to deagnostic communication device power supply and set up the physical connection of deagnostic communication device and In-vehicle networking.
302, carry out the initialization of deagnostic communication device hardware and software;
303, detect deagnostic communication device and diagnosis computer connected mode, as be wired connection, then get into 305, if be wireless connections then get into 304;
304, under the situation of wireless connections, select Bluetooth communication to get into 306;
305, under the situation of wired connection, Serial Port Line is then used in connection for serial ports, and the usb data line is then used in the USB connection;
306, start PC diagnostic client software, system search for automatically connect port, and port is carried out the initialization setting;
Whether 307, PC diagnostic client software sends the authentication instruction to the deagnostic communication device, detect PC diagnostic client and deagnostic communication device and mate, if authentication success gets into 309, otherwise gets into 308;
308, warning PC diagnostic client software is connected unusually with the deagnostic communication device, gets into 326 then, withdraws from diagnosis;
309, diagnose vehicle to select, confirm diagnosing protocol and initialization related command;
310, select diagnostic function, comprise the Read fault sign indicating number, remove DTC, time data stream, read freeze frame, read ECU information, motion test, ECU program updating function;
311, select concrete function according to 310, select concrete diagnostic instruction;
312, concrete diagnostic instruction is sent to the deagnostic communication device with wired or wireless mode;
313, after the deagnostic communication device receives diagnostic instruction, if for the OBD diagnostic instruction then get into 315, if for deagnostic communication instruction is set then gets into 314;
314,, deagnostic communication is set operational factor is set according to command content;
315, main control module sends to protocol conversion module with diagnostic instruction and resolves.
316, protocol conversion module converts the In-vehicle networking standard signal into to diagnostic instruction and sends on In-vehicle networking K line or the CAN bus;
317, ECU handles and feedback data instruction after receiving diagnostic instruction;
318, the deagnostic communication device receives the ECU feedback data and after the protocol conversion module conversion, delivers to main control module;
319, main control module sends to the PC diagnostic client with feedback data;
320, the PC diagnostic client receives feedback data, and data are carried out verification and parsing;
321, data are handled, with literal, form or graphically show.
322, take a decision as to whether data stream circulation read mode, then return 312 in this way and send related command once more, as otherwise get into 323;
323, under the data with existing situation, carry out simple analysis, provide and diagnose help.
324, maintenance technician or maintenance expert address fault;
325, deposit the vehicle diagnostics result in database, so that make the automobile failure diagnosis case history;
326, diagnosis finishes.
The content of not doing in this instructions to describe in detail belongs to this area professional and technical personnel's known prior art.
Claims (8)
1. a multi-functional automatically controlled vehicle remote fault diagnosis system is made up of deagnostic communication device, three parts of PC diagnostic client and remote fault diagnosis service centre,
Remote fault diagnosis service centre: management automobile failure diagnosis network; Intelligent diagnostics and the help of the sharing of upgrading, remote diagnosis data, the remote failure of deagnostic communication device and PC diagnostic client, the management of automobile failure diagnosis specialists meeting, the statistics and the query function of automobile fault information are provided, and said remote fault diagnosis service centre is become with database servers group by diagnosis management server, diagnosis helping service device;
PC diagnostic client: be connected with the deagnostic communication device; As the Diagnosis Application layer; Mainly pass through human-computer interaction interface; For the different rights user provides concrete vehicle diagnosis application function and remote diagnosis interface, can realize basic diagnosis through the deagnostic communication device to vehicle failure, form by human-computer interaction module, safety control module, Diagnosis Application module, data management module, remote diagnosis module, diagnosis help module, software upgrading module;
Deagnostic communication device: realize communication Protocol Conversion and data transmission between diagnostic software and the In-vehicle networking, form by main control module, power module, communication module, program curing refresh module;
In the said remote fault diagnosis service centre:
Diagnosis management server: comprise diagnostic system authority management module, diagnostic network administration module, diagnostic system updating and management module and car fault diagnosis statistical analysis module;
Diagnosis helping service device: comprise automobile failure diagnosis expert system module, maintenance expert assistance module, ECU refresh module and diagnosis help module;
Database server: comprise user rights database, edition data storehouse, the vehicle database of case history, ECU refresh, expertise database, help database.
2. multi-functional automatically controlled vehicle remote fault diagnosis system as claimed in claim 1 is characterized in that: in the said diagnosis management server:
Diagnostic system authority management module: be the legitimate right of protection system, authentication of PC diagnostic client and correlation function mandate are provided;
The diagnostic network administration module: the deagnostic communication network is set up in responsible processing, makes things convenient for the long-range access of each legal PC diagnostic client;
Diagnostic system updating and management module: be responsible for monitoring PC diagnostic client and deagnostic communication device software version and download is provided, supervise the user to upgrade in time;
The car fault diagnosis statistical analysis module: be responsible for the vehicle medical record information is carried out statistical study, be the basis with time and distance travelled number, the reliability that car mass is provided for the automobile business men is with reference to report.
3. multi-functional automatically controlled vehicle remote fault diagnosis system as claimed in claim 1 is characterized in that: in the said diagnosis helping service device
The automobile failure diagnosis expert system module: through dual mode is that long-range PC diagnostic client is offered help; With the expertise database is that the basis is carried out reasoning and pointed out failure cause, is that the basis provides similar case history for PC diagnostic client maintenance technician or maintenance expert reference with the vehicle database of case history;
The maintenance expert assistance module: be responsible for literal, picture, voice, video mode, the convenient for maintaining expert is to far-end maintenance technician's technological guidance;
The ECU refresh module: the main comparison client information of vehicles of being responsible for, select suitable ECU refreshing file to download for Terminal Server Client;
Diagnosis help module: be the basis to help database,, help the user to solve the actual vehicle failure problems for the user provides the diagnosis help document.
4. multi-functional automatically controlled vehicle remote fault diagnosis system as claimed in claim 1 is characterized in that: in the said database server:
User rights database: storage user and authority information thereof;
Edition data storehouse: store corresponding PC diagnostic client and diagnostic device version information;
The vehicle database of case history: store each vehicle medical record information that dispatches from the factory;
ECU refresh: storage ECU refreshing file and this document and manufacturing match information relation;
Expertise database: the expertise of electronization expression in the storage automobile failure diagnosis expert system;
Help database: storage failure helps data, comprises fault detail description, fault signature, fault interlock circuit figure, fault clearance way.
5. multi-functional automatically controlled vehicle remote fault diagnosis system as claimed in claim 1 is characterized in that: in the said PC diagnostic client:
Human-computer interaction module: for the user provides software operation interface and Presentation Function; Realize system operational parameters being set and selecting each Diagnosis Application function through mouse or keyboard operation interface, diagnostic result is presented on the display with text, tabulation and three kinds of modes of curve so that the checking of maintenance technician or expert personnel;
Safety control module: encryption, decrypting process when being responsible for deagnostic communication device or internet communication prevent other people illegal wiretapping; Also be responsible for the control of authority of software systems simultaneously, distinguish user class and open difference in functionality;
Diagnosis Application module: be based upon on ISO14230, ISO15765, the SAEJ1939 Diagnosis Application layer protocol basis; Accept the selection of human-computer interaction module or remote diagnosis module, send concrete diagnostic function order to the deagnostic communication device according to the regulation of diagnosing protocol;
Data management module: be responsible for the data management of PC diagnostic client, comprise the collection of vehicle diagnostics medical record information, temporary and management, and be uploaded to remote diagnosis service centre through the remote diagnosis module; Wherein the vehicle diagnostics medical record information comprises VIN sign indicating number, license plate number, maintenance website, maintenance technician, servicing time, DTC, freeze frame, data stream numbering, diagnostic result, maintenance history, maintenance result;
Remote diagnosis module: the PC diagnostic client is inserted vehicle remote fault diagnosis network as node through socket; Under the help of the diagnosis helping service device of remote fault diagnosis service centre; Realize the remote diagnosis data sharing, work in coordination with the fault automobile is diagnosed;
Diagnosis help module: on local and remote assistance Basis of Database; Comprise fault detail description, fault signature, fault interlock circuit figure, fault clearance way relevant information for the maintenance technician provides, the fault automobile is done detailed fault analysis to the convenient for maintaining technician and fault is got rid of;
The software upgrading module: the software program of be responsible for upgrading in time PC diagnostic client and deagnostic communication device, revise the current version software error, in time replenish the new model diagnosing protocol, comprise that software version comparison, redaction download and installation function.
6. multi-functional automatically controlled vehicle remote fault diagnosis system as claimed in claim 1 is characterized in that: in the said deagnostic communication device:
Main control module: with the single-chip microcomputer is core, and the normal operation of each system of control deagnostic communication device comprises the switching of deagnostic communication device communication pattern, the selection of diagnosing protocol, the buffer memory of data and transmission control;
Power module: be meant through certain power-switching circuit, convert the power supply on vehicle of vehicle interior into each module of deagnostic communication device required working power; Monitor the abnormity of power supply situation simultaneously and in time take safeguard measure, to guarantee the security of deagnostic communication device;
Communication module: mainly comprise the communication of PC diagnostic client and communicating by letter of In-vehicle networking, link to each other with bluetooth, realize the wired or wireless data transmission of deagnostic communication device and PC diagnostic client with PC diagnostic client computer USB, serial ports; Be connected with In-vehicle networking then based on diagnosing protocol ISO14230, ISO15765, the SAE J1939 of K line and CAN bus, realize that deagnostic communication device and respective physical layers, data link layer and the network layer data transmission of In-vehicle networking control;
The program curing refresh module: mainly be responsible for the program updating of main control chip, the object code file after will compiling through this module downloads in the FLASH memory block of main control chip.
7. multi-functional automatically controlled vehicle remote fault diagnosis system as claimed in claim 1, it is characterized in that: the remote diagnosis method under the networking pattern is:
202, PC diagnostic client network sends the diagnostic network request of landing automatically in the situation that exists network to connect;
203, the diagnostic network administration module inserts the PC diagnostic client and asks to verify, confirms whether it is validated user and authority thereof;
204, authentication error, the disabled user inserts and directly withdraws from diagnosis;
205, diagnostic expert system obtains the associated vehicle diagnostic data from the PC diagnostic client, carries out reasoning relatively, and intelligent specified fault reason provides and diagnoses help;
206, judge whether diagnostic expert system solves the current failure problems of PC diagnostic client, in this way, then solve concrete fault to 213; As not, get into 207 request maintenance experts further help is provided;
207, the maintenance technician is through the PC diagnostic client, to more senior network of maintenance and repair maintenance expert or automobile business men maintenance expert request diagnostic assistance;
208, the diagnostic network administration module is that maintenance technician's the PC diagnostic client and the PC diagnostic client of maintenance expert are set up the correspondence mappings relation, and through NAT through-transmission technique, the end-to-end connection of setting up two clients;
209, maintenance technician and maintenance expert be through literal, picture, voice, visual form shared data, and provide and diagnose help;
210, judge whether current maintenance expert solves the current failure problems of PC diagnostic client, in this way, then solve concrete fault to 213; As not, get into 211 request multidimensional and repair the expert further help is provided;
211, fail to accomplish under the situation of diagnosis 209, utilize diagnostic network to invite several experts to diagnose jointly;
212, service centre's maintenance expert assistance module is shared current diagnostic data, coordinates multidimensional and repaiies the technological guidance of expert to the far-end maintenance technician;
213, solve concrete fault;
214, deposit diagnostic result in database;
215, diagnosis finishes.
8. multi-functional automatically controlled vehicle remote fault diagnosis system as claimed in claim 1, it is characterized in that: the remote diagnosis method at single cpu mode is:
301, begin diagnosis, through the OBD interface to deagnostic communication device power supply and set up the physical connection of deagnostic communication device and In-vehicle networking;
302, carry out the initialization of deagnostic communication device hardware and software;
303, detect deagnostic communication device and diagnosis computer connected mode, as be wired connection, then get into 305, if be wireless connections then get into 304;
304, under the situation of wireless connections, select Bluetooth communication to get into 306;
305, under the situation of wired connection, Serial Port Line is then used in connection for serial ports, and the usb data line is then used in the USB connection;
306, start PC diagnostic client software, system search for automatically connect port, and port is carried out the initialization setting;
Whether 307, PC diagnostic client software sends the authentication instruction to the deagnostic communication device, detect PC diagnostic client and deagnostic communication device and mate, if authentication success gets into 309, otherwise gets into 308;
308, warning PC diagnostic client software is connected unusually with the deagnostic communication device, gets into 326 then, withdraws from diagnosis;
309, diagnose vehicle to select, confirm diagnosing protocol and initialization related command;
310, select diagnostic function, comprise the Read fault sign indicating number, remove DTC, time data stream, read freeze frame, read ECU information, motion test, ECU program updating function;
311, select concrete function according to 310, select concrete diagnostic instruction;
312, concrete diagnostic instruction is sent to the deagnostic communication device with wired or wireless mode;
313, after the deagnostic communication device receives diagnostic instruction, if for the OBD diagnostic instruction then get into 315, if for deagnostic communication instruction is set then gets into 314;
314,, deagnostic communication is set operational factor is set according to command content;
315, main control module sends to protocol conversion module with diagnostic instruction and resolves;
316, protocol conversion module converts the In-vehicle networking standard signal into to diagnostic instruction and sends on In-vehicle networking K line or the CAN bus;
317, ECU handles and feedback data instruction after receiving diagnostic instruction;
318, the deagnostic communication device receives the ECU feedback data and after the protocol conversion module conversion, delivers to main control module;
319, main control module sends to the PC diagnostic client with feedback data;
320, the PC diagnostic client receives feedback data, and data are carried out verification and parsing;
321, data are handled, with literal, form or graphically show;
322, take a decision as to whether data stream circulation read mode, then return 312 in this way and send related command once more, as otherwise get into 323;
323, under the data with existing situation, carry out simple analysis, provide and diagnose help.
324, maintenance technician or maintenance expert address fault;
325, deposit the vehicle diagnostics result in database, so that make the automobile failure diagnosis case history;
326, diagnosis finishes.
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| Publication number | Priority date | Publication date | Assignee | Title |
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