CN101231513A - Vehicle fault diagnosis system based on short message service - Google Patents
Vehicle fault diagnosis system based on short message service Download PDFInfo
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- CN101231513A CN101231513A CNA2007100669186A CN200710066918A CN101231513A CN 101231513 A CN101231513 A CN 101231513A CN A2007100669186 A CNA2007100669186 A CN A2007100669186A CN 200710066918 A CN200710066918 A CN 200710066918A CN 101231513 A CN101231513 A CN 101231513A
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- 238000001514 detection method Methods 0.000 abstract 3
- 238000012423 maintenance Methods 0.000 abstract 2
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Abstract
The invention relates to a system based on a short message service for fault analysis and client notification with a vehicle fault diagnosis expert system according to the vehicle detection data by using vehicle diagnosis technique. The technical proposal of the invention is that a vehicle detection device collects the data of real-time vehicle fault detection via an EOBD interface, the detected data are packed in short message format and sent to a mobile phone of a driver in wired or wireless manner and also sent to the remote vehicle fault diagnosis expert system via the short message service; and the remote vehicle fault diagnosis expert system provides the information of diagnostic results, handling methods and repair/maintenance suggestions according to the detected data, and sends the information in short message format to the mobile phone of the driver. The invention realizes the real-time detection, repair and maintenance of vehicle with low cost and easy promotion.
Description
Technical field
The present invention relates to Short Message Service (SMS:Short Message Service), On-Board Diagnostics (OBD) technology (EOBD:European On-Board Diagnostics) and the automobile failure diagnosis expert system of moving communicating field, relate in particular to a kind ofly based on Short Message Service, the car data detection that provides according to the On-Board Diagnostics (OBD) technology carries out fault analysis by the automobile failure diagnosis expert system and notifies user's system.
Background technology
EOBD (European On-Board Diagnostics) is called for short OBD (On-Board Diagnostics), i.e. On-Board Diagnostics (OBD) technology.The engine management system that meets Europe III and Europe IV Abgasgesetz all has the vehicle-mounted fault diagnosis function, according to definition, it is " onboard diagnostic system that is used for emission control ", and must discern the possible range of fault by being stored in dead code in the computer memory.Instruction 70/220/EEC (98/69/EC) the annex XI that came into force simultaneously with Europe III from 2000 has been worked out in Europe, and this instruction is applicable to Europe III and Europe IV Abgasgesetz, and content comprises:
(1) all vehicles must be equipped the OBD system, and its design, manufacturing and installation should be able to guarantee that vehicle discerns types of degradation and fault type in the whole lifetime.
(2) during each engine start, all must a series of diagnostic detection of beginning.
(3) the OBD system must write down the code of indication emission control systems state.Use various ad hoc state codes to identify the emission control systems of correctly working, and those emission control systems that need further running vehicle to estimate all sidedly.Must cause that the dead code that fault detector activates stores owing to deterioration or fault or permanent discharging failure mode, this dead code must identify the type of fault.Between the fault detector active period, the distance of vehicle ' process must be read by the serial port of standard data connector at any time.
(4) if in the circulation of at least 40 engine warm-ups (at this instruction middle finger vehicle that fully turns round, count the 22K that raise at least when making coolant temperature from engine start, and reach 70 ℃ at least) in identical inefficacy does not appear, then dead code, the distance of travelling and freeze frame information can be wiped by the OBD system.
(5) manufacturer is after dealer that any family is authorized or maintenance depot provide repair information, should in three months, pay rationally and after the expense of non-discrimination and provide these data (comprising follow-up improvement and updates), and correspondingly circulate a notice of to type approval competent authority to other people.
The EOBD standard provides the real-time online examination criteria of engine, chassis, vehicle body and accessory to automobile, and stipulates that automobile vendor must disclose the coherent detection data.By being communicated by letter with the control unit of engine ECU (Engine Control Unit) of automobile by the K line interface of ISO9141-2 definition or CAN (the CONTROLLER AREA NETWORKS) bus interface of ISO15765 definition, the detection data that can obtain automobile are diagnosed the fault of automobile.Motor vehicle exhaust emission Chinese Industrial Standards (CIS)---GB III is with reference to the EOBD standard, and this provides standard for the domestic automobile user obtains car data detection.
But existing EOBD fault detect instrument all is for the professional of motor vehicle repair design, has following shortcoming:
(1) complicated operation, common person for driving a car can not operate easily.
(2) cost an arm and a leg, common person for driving a car holds and dares not accept.
(3) can not the real-time diagnosis vehicle trouble and provide corresponding solution to common person for driving a car.
(4) can not detect vehicle and provide vehicle maintenance suggestion in real time to common person for driving a car.
Short Message Service by ETSI GSMO3.40 specification description is the text message that sends and receive finite length by mobile phone.By ETSI GSMO3.38 normalized definition the coded system of short message, wherein 8-bit PDU coded system is used to transmit binary data, the quality paper length of the short message of its coding is 140 characters; 16-bit PDU coded system is used to transmit the UCS2 text message, and Chinese and English short message is encoded with UCS2, and its quality paper length is 70 characters.In vehicle failure detection, the car data detection that can encode and obtain from the EOBD interface with 8-bit PDU mode is with the 16-bit PDU mode Chinese and English diagnostic result of encoding.
By having defined the PDU pattern in ETSI GSMO7.05 and the ETSI GSMO7.07 standard, use the transmission and the reception of AT instruction control short message.In automobile failure diagnosis, can use Short Message Service to send and reception car data detection and diagnostic result by the AT instruction.
Cheap, real-time that short message has, and can carry several data by the PDU coding mode, comprise binary data and Chinese and English text data.Be fit to very much be applied to transmit vehicle failure detection data and diagnostic result.
Summary of the invention
Technical matters to be solved by this invention provides a kind of vehicle fault diagnosis system, can allow common person for driving a car understand the situation of automobile in time, easily and accurately.
Another technical matters to be solved by this invention provides a kind of vehicle failure detection device, can from the EOBD interface obtain according to the On-Board Diagnostics (OBD) technology for detection to data and data are sent by Short Message Service.
Another technical matters to be solved by this invention provides a kind of automobile failure diagnosis expert system, it can according to the On-Board Diagnostics (OBD) technology for detection to data diagnose the fault of automobile exactly, and provide corresponding disposal route and maintenance suggestion.
In order to solve the problems of the technologies described above, technical scheme of the present invention is:
A kind of vehicle fault diagnosis system based on Short Message Service, comprise vehicle failure detection device and automobile failure diagnosis expert system, its key is that the vehicle failure detection device obtains the fault-detection data of automobile in real time by the EOBD interface, to detect data encapsulation then is that short message format is sent to through wired or wireless mode on person for driving a car's the mobile phone, car data detection is sent to the automobile failure diagnosis expert system of far-end by Short Message Service; Data are made diagnostic result to the automobile failure diagnosis expert system and corresponding disposal route, maintenance are advised and these information are sent on person for driving a car's the mobile phone by Short Message Service according to detecting.
Described vehicle failure detection device comprises control module, EOBD interface unit, short message encapsulation unit, AT instruction control unit and handset port unit.Wherein control module is coordinated the work of other each unit, the EOBD interface unit sends order and receives the fault-detection data of returning to the EOBD of automobile interface, it is short message that the short message encapsulation unit will detect data encapsulation, and the AT instruction control unit sends SMS message by handset port unit controls mobile phone.The handset port unit passes through serial port or infrared ray or bluetooth and is connected with mobile phone.
Described automobile failure diagnosis expert system comprises short message processing unit and diagnostic expert system unit, wherein the short message processing unit takes out from the short message that receives and detects data and send the diagnostic expert system unit to, the diagnostic expert system unit is made diagnostic result and corresponding disposal route and is sent the short message processing unit to according to detecting data, and the short message processing unit is sent to diagnostic result on person for driving a car's the mobile phone with short message way.
Technique effect of the present invention is:
(1) should based on vehicle fault diagnosis system of Short Message Service can be convenient, in time, the fault and the disposal route accordingly of display automobile accurately.Its principle is as follows, the person for driving a car is when driving, mobile phone is connected with the vehicle failure detection device of this vehicle fault diagnosis system, when breaking down, according to the On-Board Diagnostics (OBD) technology for detection to data be sent to the automobile failure diagnosis expert system of this vehicle fault diagnosis system by Short Message Service, the diagnostic result of expert system and corresponding disposal route are passed mobile phone back by short message and are shown.
(2) should can before breaking down, automobile provide the maintenance suggestion in time based on the vehicle fault diagnosis system of Short Message Service.Its principle is as follows, the person for driving a car is not when automobile breaks down, vehicle failure detection device by this vehicle fault diagnosis system will according to the On-Board Diagnostics (OBD) technology for detection to data be sent to the diagnostic expert system of this vehicle fault diagnosis system, expert system application artificial intelligence is carried out reasoning, finds out potential faults and provides the maintenance suggestion.
(3) should can use the mobile phone of different model to receive and dispatch short message based on the vehicle fault diagnosis system of Short Message Service.The handset port unit of the vehicle failure detection device of this vehicle fault diagnosis system can be connected with the mobile phone of various models by modes such as serial port, infrared ray, bluetooths.
Description of drawings
The invention will be further described below in conjunction with the drawings and specific embodiments.
Fig. 1 is based on the synoptic diagram of the vehicle fault diagnosis system of Short Message Service
Fig. 2 is the structural representation of vehicle failure detection device
Fig. 3 is the structural representation of automobile failure diagnosis expert system
Embodiment
Fig. 1 is the synoptic diagram that the present invention is based on the vehicle fault diagnosis system of Short Message Service, and this invention comprises vehicle failure detection device 1 and automobile failure diagnosis expert system 2.The EOBD interface of vehicle failure detection device 1 by automobile obtains the detection data of automobile and the Short Message Service by mobile phone sends to automobile failure diagnosis expert system 2, automobile failure diagnosis expert system 2 is made diagnostic result and corresponding disposal route according to detecting data, diagnostic result and disposal route are sent to mobile phone and show on mobile phone by Short Message Service.
Fig. 2 is the structural representation of vehicle failure detection device 1, and this vehicle failure detection device 1 comprises control module 11, EOBD interface unit 12, short message encapsulation unit 13, AT instruction control unit 14 and handset port unit 15.Wherein control module 11 is to other each unit transmitting control commands and receive corresponding condition responsive, to coordinate the work between each unit.EOBD interface unit 12 is connected by 16 needle connectors that meet the J1962 standard with the EOBD interface of automobile, and by communicating by letter with the control unit of engine ECU (Engine Control Unit) of automobile by the K line interface of ISO9141-2 definition or CAN (the CONTROLLER AREA NETWORKS) bus interface of ISO15765 definition.EOBD interface unit 12 sends order and receives the fault-detection data of returning to the EOBD of automobile interface.EOBD interface unit 12 is notified control module 11 after receiving fault-detection data, control module 11 starts short message encapsulation unit 13.Short message encapsulation unit 13 will detect data encapsulation to be the short message of 8-bit PDU coded format and to notify control module 11, and control module 11 starts AT instruction control units 14.AT instruction control unit 14 is controlled mobile phone by handset port unit 15 and is sent SMS message.Handset port unit 15 passes through serial port cable or infrared ray or bluetooth and is connected with mobile phone, and by handset port unit 15, this vehicle failure detection device 1 can be connected with the mobile phone of various models.
Fig. 3 is the structural representation of automobile failure diagnosis expert system 2, and this automobile failure diagnosis expert system 2 comprises short message processing unit 3 and diagnostic expert system unit 4.Wherein short message processing unit 3 is made up of short message communication unit 31 and short message codec unit 32.Diagnostic expert system unit 4 is made up of inference machine 41, vehicle database 42 and diagnostic knowledge base 43.The short message that detects data that comprises that sends from mobile phone is sent to short message communication unit 31, short message communication unit 31 is sent to short message codec unit 32 with the short message that receives, short message codec unit 32 is decoded short message by 8-bit PDU form, therefrom extract and detect data and send diagnostic expert system unit 4 to, the inference machine 41 of diagnostic expert system unit 4 is according to detecting data, the information that vehicle database 42 and diagnostic knowledge base 43 provide is made diagnostic result and is sent short message codec unit 32 to corresponding disposal route and with diagnostic result and disposal route, short message codec unit 32 is encapsulated as diagnostic result the short message of 16-bit PDU coded format (support Chinese text) and sends short message communication unit 31 to, and short message communication unit 31 is sent to person for driving a car's mobile phone with short message and shows on the screen of mobile phone.
In a most preferred embodiment of the present invention, should comprise vehicle failure detection device 1 and automobile failure diagnosis expert system 2 based on the vehicle fault diagnosis system of Short Message Service.Vehicle failure detection device 1 is connected by the J1962 connector with the EOBD interface of automobile, vehicle failure detection device 1 and person for driving a car's mobile phone is connected by serial port cable or infrared ray or bluetooth, and vehicle failure detection device 1 transmits by Short Message Service with automobile failure diagnosis expert system 2 and detects data and diagnostic result.
The method of operating of this most preferred embodiment is as follows: when the user breaks down at automobile, mobile phone is connected by handset port unit 15 with vehicle failure detection device 1, control module 11 will be to EOBD interface unit 12 transmitting control commands after having detected the mobile phone connection, and EOBD interface unit 12 sends query statement in the back that receives orders to the EOBD of automobile interface.The EOBD interface of automobile returns to EOBD interface unit 12 with the real-time detection data of automobile after receiving query statement.Control module 11 order short message encapsulation units 13 are encoded to car data detection the 8-bit PDU packet that meets the short message standard and pass to AT instruction control unit 14.AT instruction control unit 14 sends the AT instruction by handset port unit 15 to mobile phone short message is sent.The short message communication unit 31 of automobile failure diagnosis expert system 2 reads and comprises the short message that detects data, and is car data detection with short message by 8-bit PDU formats and is delivered to diagnostic expert system unit 4 by short message codec unit 32.The inference machine 41 of diagnostic expert system unit 4 has judged whether fault and has provided diagnostic result and corresponding disposal route according to vehicle database 42 and the diagnostic knowledge base 43 that detection data, automobile vendor provide.The diagnostic result of diagnostic expert system unit 4 is sent to short message codec unit 32 and is encoded to by 16-bit PDU coded format and meets short message specification data bag, is sent short messages to by short message communication unit 31 on person for driving a car's the mobile phone.Person for driving a car's mobile phone shows diagnostic result and disposal route on mobile phone screen after receiving short message.
In another embodiment of the present invention, the user is connected with vehicle failure detection device 1 mobile phone by handset port unit 15, control module 11 will be to EOBD interface unit 12 transmitting control commands after having detected the mobile phone connection, and EOBD interface unit 12 sends query statement in the back that receives orders to the EOBD of automobile interface.The EOBD interface of automobile returns to EOBD interface unit 12 with the real-time detection data of automobile after receiving query statement.Control module 11 order short message encapsulation units 13 are encoded to car data detection the 8-bit PDU packet that meets the short message standard and pass to AT instruction control unit 14.AT instruction control unit 14 sends the AT instruction by handset port unit 15 to mobile phone short message is sent.The short message communication unit 31 of automobile failure diagnosis expert system 2 reads and comprises the short message that detects data, and is car data detection with short message by 8-bit PDU formats and is delivered to diagnostic expert system unit 4 by short message codec unit 32.The inference machine 41 of diagnostic expert system unit 4 carries out reasoning according to detecting data, vehicle database 42 and diagnostic knowledge base 43 using artificial intelligence, has judged whether potential faults and has provided corresponding maintenance suggestion.The advisory information of diagnostic expert system unit 4 is sent to short message codec unit 32 and is encoded to by 16-bit PDU coded format and meets short message specification data bag, is sent short messages to by short message communication unit 31 on person for driving a car's the mobile phone.Person for driving a car's mobile phone after receiving short message, the display automobile maintenance that whether needs repairing on mobile phone screen.
Claims (7)
1. vehicle fault diagnosis system based on Short Message Service, comprise vehicle failure detection device (1) and automobile failure diagnosis expert system (2), it is characterized in that: vehicle failure detection device (1) obtains the fault-detection data of automobile in real time by the EOBD interface, to detect data encapsulation then is that short message format is sent on person for driving a car's the mobile phone through wired or wireless mode, by Short Message Service car data detection is sent to the automobile failure diagnosis expert system (2) of far-end, automobile failure diagnosis expert system (2) is made diagnostic result and corresponding disposal route according to detecting data, maintenance is advised and these information is sent on person for driving a car's the mobile phone by Short Message Service.
2. according to claim 1 described vehicle fault diagnosis system, it is characterized in that: the detection data and the diagnostic result that transmit automobile by Short Message Service based on Short Message Service.
3. vehicle failure detection device according to claim 1 (1) is characterized in that: the conversion of EOBD interface to the short message interface is provided.
4. according to claim 1 described automobile failure diagnosis expert system (2), it is characterized in that: comprise the short message of car data detection and from short message, extract car data detection by short message communication unit (31) reception, make diagnostic result by diagnostic data base (42) and diagnostic knowledge base (43) that inference machine (41) provides according to car data detection, automobile vendor by short message codec unit (32).
5. according to claim 3 described vehicle failure detection devices (1), it is characterized in that: comprise the short message that detects data by the transmission of AT instruction control mobile phone.
6. according to claim 3 described vehicle failure detection devices (1), it is characterized in that: be connected with the mobile phone of various models by handset port unit (15).
7. according to claim 4 described automobile failure diagnosis expert systems (2), it is characterized in that: carry out reasoning by diagnostic expert system unit (4) according to car data detection using artificial intelligence, judge whether automobile exists potential faults.
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| CNA2007100669186A CN101231513A (en) | 2007-01-26 | 2007-01-26 | Vehicle fault diagnosis system based on short message service |
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| CNA2007100669186A CN101231513A (en) | 2007-01-26 | 2007-01-26 | Vehicle fault diagnosis system based on short message service |
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