CN103455025A - Automobile fault diagnosis system based on Android platform - Google Patents
Automobile fault diagnosis system based on Android platform Download PDFInfo
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- CN103455025A CN103455025A CN2013103555233A CN201310355523A CN103455025A CN 103455025 A CN103455025 A CN 103455025A CN 2013103555233 A CN2013103555233 A CN 2013103555233A CN 201310355523 A CN201310355523 A CN 201310355523A CN 103455025 A CN103455025 A CN 103455025A
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Abstract
The invention provides an automobile fault diagnosis system based on an Android platform. The automobile fault diagnosis system comprises an ECU and a CAN bus, and further comprises a data conversion module, an automobile fault decoding module and an automobile fault expert analysis module, wherein one end of the data conversion module is connected with the CAN bus, the other end of the data conversion module is connected with a Bluetooth module in a wireless mode, the Bluetooth module is connected with the automobile fault decoding module, and the automobile fault decoding module is connected with the automobile fault expert analysis module. The automobile fault diagnosis system lowers automobile fault diagnosis cost, enables a diagnosis process to be more convenient, and improves automobile maintenance efficiency.
Description
Technical field
The present invention relates to vehicle electric field, be specially a kind of vehicle fault diagnosis system based on the Android platform.
Background technology
Existing vehicle fault diagnosis system, can read the diagnostic trouble code in automobile ECU, demonstration, Storage and Processing, can detect vehicle failure easy, exactly, is conducive to that automobile operating state detects and vehicle failure is keeped in repair.The automobile fault diagnostic apparatus scheme of the outer design of Present Domestic mainly contains two kinds: the failure diagnostic apparatus based on PC and based on single-chip microcomputer/FPGA(Field Programmable Gate Array, i.e. field programmable gate array) the hand-held failure diagnostic apparatus.The hardware cost of this two schemes is all higher, and the diagnostic equipment based on PC is inconvenient to carry, even consider in addition the fault that the maintenance personal has diagnosed out automobile to occur by automobile fault diagnostic apparatus, but want to judge exactly failure cause, also need to inquire about the data such as servicing manual, cause in maintenance process the auto repair personnel to spend the plenty of time and go to consult reference materials, work efficiency is lower.
The higher deficiency of hardware cost of carrying inconvenience and the hand-held diagnostic equipment based on single-chip microcomputer/FPGA for the operation of going out that solves the current diagnostic equipment based on PC.Chinese Patent Application No. is: 201310023184.9 Chinese invention patent provides a kind of mobile terminal (mobile phone/flat board) that utilizes automobile to be carried out to the method for fault diagnosis, described method comprises the steps: by diagnose interface, to follow automobile electronic control unit to connect slave computer, gathers the signal in automobile electronic control unit; The user utilizes host computer (mobile terminal) to show the data of slave computer transmission, and sends instruction to slave computer, automobile electronic control unit, between host computer and slave computer, by wireless mode, transmits and receives signal.This patent is put down in writing utilizes mobile terminal to read automobile fault code to help the maintenance personal and find the technology of failure cause to have following drawback:
The diagnostic trouble code that designed automobile fault diagnostic apparatus can only read in automobile ECU is shown, but consider the otherness of the information finite sum auto repair personnel specialty knowledge and experience that automobile fault diagnostic apparatus obtains from ECU, even common maintenance personal has diagnosed out automobile what fault to occur by automobile fault diagnostic apparatus, but want to judge exactly failure cause, also need to inquire about the data such as servicing manual, cause in maintenance process the auto repair personnel to spend the plenty of time and go to consult reference materials, work efficiency is lower.
Therefore, the present invention has introduced Perspectives of Automotive Fault Diagnosis Expert System and helps and instruct the auto repair personnel and policy-making suggestion is provided.Chinese Patent Application No. is: 201210499356.5 Chinese invention patent provides a kind of Diagnosis method of automobile faults based on repair information and expert system, described method comprises the steps: to set up the auto repair document data base of an Internet-based, create an expert system on this webserver, automobile fault diagnostic apparatus is connected with the diagnose connector on automobile, read the data in automobile ECU and be packaged into real time data, send to the repair information database that is arranged in the webserver, server sends to automobile fault diagnostic apparatus by network after transferring corresponding repair information data according to real time data again, when starting expert's function of automobile fault diagnostic apparatus, based on network expert system can infer diagnostic result according to the content in knowledge base, real time data, then sends to automobile fault diagnostic apparatus by network.There is following drawback in the technology of the Diagnosis method of automobile faults based on repair information and expert system that this patent is put down in writing:
1. diagnostic procedure must rely on network, is only suitable for using in the place that the network coverage is arranged, if workplace does not have the network coverage, will cause automobile fault diagnostic apparatus not use, and the portability of automobile fault diagnostic apparatus is restricted;
2. need the server of a stable operation to support all handheld terminal normal operations, be only suitable for using in maintenance factory, if there is phenomenons such as network failure or server failures, will cause automobile fault diagnostic apparatus not use, and increase system cost;
3. need the handheld terminal of a special use of design, be used in conjunction with server, for diagnostic trouble code read, with server communication, failure message demonstration etc., increased hardware cost and development difficulty, cause the diagnostic equipment high expensive.
Summary of the invention
For above deficiency of the prior art, the object of the present invention is to provide a kind of reduction diagnostic equipment cost, make diagnostic procedure convenient, improve the vehicle fault diagnosis system of auto repair efficiency, for achieving the above object, technical scheme of the present invention is:
A kind of vehicle fault diagnosis system based on the Android platform, comprise Android mobile phone or panel computer, be arranged at the electronic control unit ECU of automotive interior network, the CAN of the controller local area network bus be connected with described electronic control unit ECU, also comprise in data conversion module, Android mobile phone or flat board and also comprise vehicle failure decoder module and vehicle failure analysis expert module;
Described data conversion module is connected with controller local area network's CAN bus of automotive interior network internal by bus, also by the mode of bluetooth communication and the bluetooth module wireless connections on Android mobile phone or panel computer;
Vehicle failure decoder module on described Android mobile phone or panel computer connects, and described vehicle failure decoder module is connected with vehicle failure analysis expert module;
Start vehicle failure decoder module and vehicle failure analysis expert module on described Android mobile phone or panel computer, described vehicle failure decoder module generates the automobile failure diagnosis request message, and radio to data conversion module by bluetooth module, data conversion module converts the automobile failure diagnosis request message sent the CAN of controller local area network Frame request message to and passes through the CAN bus transfer to described electronic control unit ECU, described electronic control unit ECU response request also produces response message, by the CAN of controller local area network bus, send to data conversion module to convert the bluetooth data frame request message to response message, be transferred to the vehicle failure decoder module by bluetooth module, the vehicle failure decoder module parses the diagnostic trouble code of response message and is transferred to vehicle failure analysis expert module, fault category and maintenance suggestion are inquired about and drawn to fault diagnosis analysis expert module to diagnostic trouble code.
Further, described vehicle failure code decoding module comprises diagnostic function selection module, UDS diagnoses service, the XML diagnostic data base, the XML resolver, described diagnostic function selects module to be selected for the diagnostic categories for the treatment of the diagnosis vehicle, and call UDS diagnosis message generator generation diagnosis request message according to diagnostic categories, send to Car Electronic Control unit ECU, electronic control unit ECU sends response message to the XML resolver, XML resolver call XML diagnostic data base is resolved response message, draw diagnostic trouble code and be transferred to fault diagnosis analysis expert module.
Further, described vehicle failure analysis expert module comprises the reasoning diagnostic module and stores regular knowledge base for reasoning diagnosis, described reasoning diagnostic module receives the diagnostic trouble code that the XML resolver from vehicle failure code decoding module sends, and call Knowledge of Maintenance corresponding to diagnostic trouble code in knowledge base, draw fault category and maintenance suggestion.
advantage of the present invention and beneficial effect are as follows:
The present invention proposes a kind of vehicle fault diagnosis system based on the Android platform, reasoning, the diagnostic function of the existing expert system based on PC of this system, also have the advantages such as the operation of going out of the hand-held diagnostic equipment scheme based on single-chip microcomputer/FPGA is easy to carry.Because vehicle fault diagnosis system is based on mobile terminal design, make its applicable crowd more extensive, and link and the cost of hardware design have been saved, the user only need to oneself mobile phone or flat board on the diagnosis application program is installed, just can make the mobile phone of oneself or dull and stereotyped become professional automobile fault diagnostic apparatus, making that the diagnostic equipment cost is lower, system maintenance is more simple, diagnostic procedure is convenient.In the present invention, Perspectives of Automotive Fault Diagnosis Expert System is incorporated on Android platform in addition, make the looking up the fault reason convenient, and reduced the requirement to the user, with existing " cloud diagnosis " mode, compare, the diagnostic procedure of native system does not need server, do not rely on network, independence and applicability are stronger.
the accompanying drawing explanation
The system chart that Fig. 1 is the vehicle fault diagnosis system of the preferred embodiment of the present invention based on the Android platform;
The structured flowchart that Fig. 2 is the vehicle failure decoder module;
The workflow diagram that Fig. 3 is the vehicle failure decoder module;
The structured flowchart that Fig. 4 is vehicle failure analysis expert module;
The workflow diagram that Fig. 5 is vehicle failure analysis expert module.
Embodiment
The invention will be further elaborated to provide the embodiment of an indefiniteness below in conjunction with accompanying drawing.
The invention provides a kind of vehicle fault diagnosis system based on the Android platform, the present invention reads the diagnostic trouble code in automobile ECU by mobile terminal, and utilize vehicle failure analysis expert module to infer the reason that fault produces, the deficiency that the hardware cost that inconvenience and the hand-held diagnostic equipment based on single-chip microcomputer/FPGA are carried in the operation of going out that the present invention solves the current diagnostic equipment based on PC is higher, system maintenance and upgrading bother, and improved auto repair personnel's work efficiency.
Be illustrated in figure 1 system chart of the present invention:
Mobile terminal 1, Android mobile phone or the flat board of support Bluetooth function, for moving automobile failure diagnosis application program (APP);
Human-computer interaction module 2, be the touch display screen of mobile terminal, and the user can check automobile information by touch display screen, and can input relevant information to system;
Vehicle failure decoder module 3, read and resolve for automobile fault code, can read the interior diagnostic trouble code of automobile ECU, removes diagnostic trouble code, reads dynamic dataflow, write the VIN code;
Vehicle failure analysis expert module 4, for the reasoning Trouble cause, the diagnostic trouble code according to the vehicle failure decoder module from reading in ECU, in conjunction with knowledge base, carry out reasoning according to certain rule, finally reaches a conclusion;
Bluetooth module 5, be the bluetooth module that mobile terminal carries, and native system carrys out transceiving data by bluetooth module;
Automotive interior network 6, a plurality of ECU of automotive interior mainly connect by the CAN bus, mainly comprise:
BCU61, battery management unit;
HCU62, entire car controller;
IPU63, the integrated combination propulsion system;
Data conversion module 7, be used on the one hand order that mobile terminal receive sends convert thereof into the CAN data frame format, sends to automobile ECU, receives on the other hand the CAN message of automobile ECU and it is sent to mobile terminal by bluetooth.
The embodiment of an indefiniteness of the present invention is: Freescale S12 series ECU for example, as long as operation UDS service in ECU just can be diagnosed by native system;
Data conversion module 7, mainly be comprised of serial ports bluetooth module (HC05), microcontroller (STM32), CAN telecommunication circuit (TJA1050) three parts, can complete the data-switching between CAN and bluetooth.
As shown in Figure 2, the present embodiment provides a kind of automobile fault code parsing module based on the Android platform, and this module mainly comprises:
Human-computer interaction module 2, for obtaining the needed information of diagnostic procedure, and show diagnostic result;
Vehicle failure analysis expert module 4, receive the diagnostic trouble code that the fault decoder module sends, and the diagnostic trouble code received carried out to reasoning, the reason that helps the user to find fault to occur;
Data conversion module 7, for receiving the order that diagnostic equipment sends and converting the standard CAN message to, communicate with automobile ECU, reads the diagnostic trouble code in ECU, and the response message of ECU is transmitted to mobile terminal by bluetooth;
XML diagnostic data base 81, failure code table (diagnostic trouble code table corresponding to failure message) according to each depot's definition, with the XML language, a diagnostic trouble code is filled in a line XML statement with corresponding failure message, successively the content in the failure code table all is filled up in storage failure match information txt file with the XML language, is resolved for the diagnostic trouble code to reading;
Diagnostic function is selected module 82, selects the concrete vehicle of diagnosis object, and the diagnostic function carried out for this vehicle comprises: the read failure code, remove diagnostic trouble code, read dynamic dataflow, write the VIN code;
XML resolver 83, after diagnostic equipment receives response message, call resolution data stream information algorithm, the relevant information of data that inquiry is stored in the XML file from the SD card, thus resolve and calculate the corresponding information of data stream, and show net result;
UDS diagnosis service 84, be the unified service of diagnosing, and diagnostic equipment mainly comprises BCU, HCU and IPU by calling UDS diagnosis service to automotive interior ECU() send and diagnose service request messages;
Bluetooth communication 85, for communicating with data conversion module, the order that the transmission mobile terminal sends and the response data that receives data conversion module.
As shown in Figure 3, this example provides a kind of Diagnosis method of automobile faults based on the Android platform.Before the user is carrying out the vehicle diagnosis function, need first mobile phone/flat board to be connected with data conversion module, then select corresponding vehicle, parts, read failure information, the method comprises the following steps:
S11: the user selects the function of " connection device " at diagnostic equipment master interface;
This step is specially: at first the user will be inserted in data conversion module on automobile OBD interface, then in the upper automobile failure diagnosis application program provided by the invention (APP) of installing of mobile terminal (mobile phone/flat board), move this application program, enter the main interface of fault diagnostic program.
S12: open Bluetooth of mobile phone and mated;
This step is specially: select " connection device " function, system can be pointed out the user whether opened bluetooth function, select " determining ", near bluetooth equipment system meeting automatic search, find data conversion module, choose this equipment to be connected, the input password is mated, and for example in the bluetooth equipment searched, chooses name to be called the data conversion module of " Diagnosis ", connects this equipment, system can point out the user to input password, and input " 12345 " (passwords of acquiescence) mated.
S121: after successful connection, system can be pointed out the user " successful connection ", shows the state (comprising: " successful connection ", " connection failure is attempted connecting again ", " trial connects overtime, abandons connecting ") connected on diagnostic equipment master interface.
S13: select corresponding car category;
This step is specially: the user selects " vehicle diagnosis " function on diagnostic equipment master interface, system jumps to car system and selects interface, in interface is selected by car system, it is file resolution file content that system reads car from the SD card, after completing parsing work, in car system, select on interface to show that the car of supporting is title, for example the user can select to select in interface in car system " Chinese car system ", the car system that system will be selected according to the user jumps to depot and selects interface, in depot, select in interface, read depot's file resolution file content from the SD card, after completing parsing work, select on interface to show in depot depot's title of supporting, for example the user can select in interface to select " Chang'an " in depot, system jumps to vehicle according to user-selected depot and selects interface, then the user selects corresponding car system according to own actual type of vehicle, for example the user can select to select in interface in car system " Chang'an run quickly mini " then system jump to parts and select interface,
S14: select corresponding automobile component;
This step is specially: at parts, select in interface, system is fetch unit file parsing from the SD card, after completing parsing work, the component names of selecting interface display to support at parts, the parts (mainly comprising: BCU, HCU and IPU) that the user supports according to own automobile model, can carry out respectively fault diagnosis to all parts respectively, and for example user's selection " the BCU(battery control unit) " option, jump to diagnostic function and select interface.
S15: select corresponding diagnostic function;
This step is specially: at diagnostic function, select in interface, we see the diagnostic function that these parts are supported, for example before the user, the BCU of choosing comprises: read whole diagnostic trouble code, read version information, remove diagnostic trouble code, read dynamic dataflow, write the VIN code, read current diagnostic trouble code and read historical failure code totally 7 diagnostic functions, system will jump to according to user-selected diagnostic function corresponding diagnostic result display interface, then the bluetooth by mobile phone/flat board sends the diagnosis service request messages to data conversion module, data conversion module sends corresponding diagnosis service request messages to automobile ECU after receiving data, automobile ECU is according to request service, response request, and send response message to data conversion module by the CAN bus, after data conversion module receives data, then by bluetooth, response message is sent to the bluetooth of mobile phone/flat board, the diagnostic result display interface, according to the response message of automobile ECU, call corresponding UDS diagnosis service analytical algorithm, parses the data of response message, and demonstrate diagnostic message, thereby complete the fault diagnosis functions to automobile ECU.
S151: remove the diagnostic trouble code function, after the user clicks this diagnostic function, will remove all diagnostic trouble code of ECU storage, comprise current and historical failure code.
S152: the read failure code is resolved and is shown, after the user clicks this diagnostic function, will read all diagnostic trouble code of ECU storage, comprises current and historical failure code.
S153: read the dynamic dataflow function, after selecting to read the dynamic dataflow function, diagnostic equipment will read the real-time vehicle operating parameter of storing in ECU.
As shown in Figure 4, the present embodiment also provides a kind of vehicle failure analysis expert system, employing be Eclipse Java EE IDE for Web Developers development environment, the compiling after directly the generation the APK file, just can be contained on mobile phone and move.This system mainly comprises:
Knowledge base 8, for depositing the required information such as rule of reasoning, comprise the empirical knowledge that conventional knowledge and expert are exclusive, is the set of expert's domain knowledge, and the SQLite that adopts Android system to carry carries out storage and maintenance;
Reasoning diagnostic module 9, described reasoning diagnostic module 9 comprises:
Knowledge base maintenance module 102, mainly solve the maintenance issues to knowledge base, comprises the operations such as interpolation to knowledge, modification, renewal.
On the described basis of reading automobile ECU internal fault code of Fig. 2, a kind of method that also provides reason of utilizing vehicle failure analysis expert module to produce diagnostic trouble code to carry out reasoning, the reason that guides user finds fault to occur step by step.As shown in Figure 5, the method comprises concrete flow process:
S21: obtain diagnostic trouble code;
This step is specially: after the user reads automobile fault code, enable inference function, failure diagnostic apparatus sends to fault diagnosis expert system by the diagnostic trouble code parsed;
S22: the phenomenon produced for the corresponding fault of this diagnostic trouble code inquiry user, by man-machine interaction, obtain relevant information;
S23: inference machine is inquired about and the retrieval fault category from knowledge base;
S24: contrast current fault and the fault category in knowledge base;
S25: current phenomenon of the failure whether with knowledge base in the fault category coupling;
S251: match fault category, reach a conclusion, and provide related advisory;
S252: if do not find the fault category of coupling, continue inquiry user malfunction information.
Above these embodiment are interpreted as only for the present invention is described, is not used in and limits the scope of the invention.After the content of having read record of the present invention, the technician can make various changes or modifications the present invention, and these equivalences change and modification falls into the scope of the claims in the present invention equally.
Claims (4)
1. the vehicle fault diagnosis system based on the Android platform, comprise Android mobile phone or panel computer (1), be arranged at the electronic control unit ECU of automotive interior network (6), the CAN of the controller local area network bus be connected with described electronic control unit ECU, it is characterized in that: also comprise in data conversion module (7), Android mobile phone or flat board (1) and also comprise vehicle failure decoder module (3) and vehicle failure analysis expert module (4);
By bus, the controller local area network CAN bus inner with automotive interior network (6) is connected described data conversion module (7), also by the mode of bluetooth communication and bluetooth module (5) wireless connections on Android mobile phone or panel computer (1);
Vehicle failure decoder module (3) on described Android mobile phone or panel computer (1) connects, and described vehicle failure decoder module (3) is connected with vehicle failure analysis expert module (4);
In described Android mobile phone or upper vehicle failure decoder module (3) and the vehicle failure analysis expert module (4) of starting of panel computer (1), described Android mobile phone or panel computer (1) the fault decoder module (3) of getting on the car generates the automobile failure diagnosis request message, and radio to data conversion module (7) by bluetooth module (5), data conversion module (7) converts the automobile failure diagnosis request message sent the CAN of controller local area network Frame request message to and passes through the CAN bus transfer to described electronic control unit ECU, described electronic control unit ECU response request also produces response message, by the CAN of controller local area network bus, send to data conversion module (7) to convert the bluetooth data frame request message to response message, be transferred to vehicle failure decoder module (3) by bluetooth module (5), vehicle failure decoder module (3) parses the diagnostic trouble code of response message and is transferred to vehicle failure analysis expert module (4), fault diagnosis analysis expert module (4) is inquired about diagnostic trouble code and is shown that fault category is with the maintenance suggestion and in Android mobile phone or the upper demonstration of panel computer (1).
2. the vehicle fault diagnosis system based on the Android platform according to claim 1, is characterized in that: also have the human-computer interaction module (2) be connected with vehicle failure analysis expert module (4) with vehicle failure decoder module (3) respectively.
3. the vehicle fault diagnosis system based on the Android platform according to claim 1, it is characterized in that: described vehicle failure code decoding module (3) comprises diagnostic function selection module (31), UDS diagnosis service (34), XML diagnostic data base (32), XML resolver (33), described diagnostic function selects module (31) to be selected for the diagnostic categories for the treatment of the diagnosis vehicle, and call UDS diagnosis message generator (34) generation diagnosis request message according to diagnostic categories, send to Car Electronic Control unit ECU, electronic control unit ECU sends response message to XML resolver (33), XML resolver (33) call XML diagnostic data base (32) is resolved response message, draw diagnostic trouble code and be transferred to fault diagnosis analysis expert module (4).
4. the vehicle fault diagnosis system based on the Android platform according to claim 1, it is characterized in that: described vehicle failure analysis expert module (4) comprises reasoning diagnostic module (15) and stores reasoning to be diagnosed with regular knowledge base (16), described reasoning diagnostic module (15) receives the diagnostic trouble code that the XML resolver (33) from vehicle failure code decoding module (3) sends, and call Knowledge of Maintenance corresponding to diagnostic trouble code in knowledge base (16), draw fault category and maintenance suggestion.
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