CN101992733A - Automobile fault real-time prompt system - Google Patents

Automobile fault real-time prompt system Download PDF

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Publication number
CN101992733A
CN101992733A CN2009101094467A CN200910109446A CN101992733A CN 101992733 A CN101992733 A CN 101992733A CN 2009101094467 A CN2009101094467 A CN 2009101094467A CN 200910109446 A CN200910109446 A CN 200910109446A CN 101992733 A CN101992733 A CN 101992733A
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China
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master control
control unit
interface device
vehicle failure
module
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CN2009101094467A
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Chinese (zh)
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黄炳华
王兆海
黄文伟
付涛
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Shenzhen Polytechnic
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Shenzhen Polytechnic
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Priority to CN2009101094467A priority Critical patent/CN101992733A/en
Publication of CN101992733A publication Critical patent/CN101992733A/en
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  • Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)
  • Testing And Monitoring For Control Systems (AREA)

Abstract

The invention discloses an automobile fault real-time prompt system, which is used for connecting and communicating with a vehicle-mounted diagnosis system. The automobile fault real-time prompt system comprises interface equipment, a master control unit and output equipment, wherein the master control unit comprises a processor and a data acquisition/analysis module, and the processor is electrically connected with the interface equipment and the output equipment respectively. During use, the interface equipment is connected to the vehicle-mounted diagnosis system; the master control unit receives a request signal from a user; the request signal is converted and recoded by the interface equipment and is transmitted to the vehicle-mounted diagnosis system; a response signal output by the vehicle-mounted diagnosis system is converted and recoded by the interface equipment and is transmitted to the master control unit; the master control unit analyzes the response signal so as to obtain an analyzed result through the data acquisition/analysis module; and the analyzed result is output by the output equipment. The automobile fault real-time prompt system can perform real-time fault diagnosis on an automobile, and has lower cost.

Description

Vehicle failure real-time prompting system
Technical field
The present invention relates to a kind of vehicle failure prompt system, especially relate to a kind of vehicle failure real-time prompting system.
Background technology
The widespread use on automobile along with Eltec and control technology, the fault that automobile takes place can detect by the fault locator of special use.A kind of fault diagnosis equipment of existing special use is to set up by the ECU (Electrical Control Unit) (ECU) of automobile detection system (OBD-II) network interface and automobile to write to each other, thereby realizes the diagnosis of vehicle failure.
Yet there is following shortcoming in the fault detection instrument of above-mentioned special use:
1. described fault detection instrument use the specialized maintenance personnel of object as motor transport repair shop.The maintainer still needs to consult relevant manual of maintenance after extracting the data relevant with fault, just can further judge.
2. described fault detection instrument is just to use after vehicle failure produces, and there is hysteresis phenomenon in the processing of problem, can not provide enough actv. information to make the chaufeur danger that fault is brought of in time taking measures to reduce to chaufeur in the very first time.
3. described fault detection instrument costs an arm and a leg, and frequency of utilization is low.
Summary of the invention
In view of above-mentioned condition, be necessary to provide a kind of vehicle failure real-time prompting system of simply fast detecting vehicle failure.
A kind of vehicle failure real-time prompting system, it is used for being connected communication with onboard diagnostic system.Vehicle failure real-time prompting system comprises interface device, Master Control Unit and outdevice.Master Control Unit comprises treater and data acquisition/analysis module, and treater electrically connects with interface device and outdevice respectively.During use, interface device is connected in onboard diagnostic system, Master Control Unit receive from user's request signal by interface device conversion and recompile and be transferred to onboard diagnostic system; The acknowledge signal of onboard diagnostic system output is by interface device conversion and recompile and be transferred to Master Control Unit, and Master Control Unit is analyzed acknowledge signal by data acquisition/analysis module and drawn analysis result, and analysis result is exported by outdevice.
Above-mentioned vehicle failure real-time prompting system is connected communication with onboard diagnostic system, can data and the controlled variable to onboard diagnostic system conduct interviews under motoring condition, carries out trouble diagnosing, the read failure sign indicating number.Above-mentioned vehicle failure real-time prompting system also can analyze the reason that fault produces by Master Control Unit, provide real-time fault prompting, expeditious measures and concrete repairing hints and tips, reduce car owner's loss, and cost is lower, can install with car, be fit to common car owner.
Description of drawings
Fig. 1 is the integral structure scheme drawing of the vehicle failure real-time prompting system of the embodiment of the invention.
Fig. 2 is the constructional drawing of the interface device of vehicle failure real-time prompting shown in Figure 1 system.
Fig. 3 is the software control flow chart of the interface device of vehicle failure real-time prompting shown in Figure 1 system.
Fig. 4 is the cut-away view of ELM327 cake core.
Fig. 5 is the circuit design drawing of ELM327 cake core.
Fig. 6 is the pinout figure of the ELM327 cake core of Fig. 5.
Fig. 7 is the communication graph of a relation between each secondary module of data acquisition/analysis module of vehicle failure real-time prompting shown in Figure 1 system.
Fig. 8 is serial communication secondary module among Fig. 7, request/the reply structure and the annexation figure of secondary module and data analysis secondary module.
Fig. 9 is the control flow chart of master control among Fig. 7/output secondary module to voice broadcast module among Fig. 1.
Figure 10 is the control flow chart of master control among Fig. 7/output secondary module to screen display module among Fig. 1.
Figure 11 is the circuit diagram of voice broadcast module among Fig. 1.
Figure 12 is the pinout figure of XF-S4240 module among Figure 11.
Figure 13 is the circuit diagram of screen display module among Fig. 1.
The specific embodiment
Below in conjunction with drawings and Examples vehicle failure real-time prompting of the present invention system is described in further detail.
See also Fig. 1, vehicle failure real-time prompting system 100 is used for being connected communication with onboard diagnostic system 10, and it comprises interface device 11, Master Control Unit 12 and outdevice 13.Master Control Unit 12 comprises treater 121 and data acquisition/analysis module 122, and treater 121 electrically connects with interface device 11 and outdevice 13 respectively.During use, interface device 11 is connected in onboard diagnostic system (OBD-II) 10, Master Control Unit 12 receive from user's request signal by interface device 11 conversions and recompile and be transferred to onboard diagnostic system 10.The acknowledge signal of onboard diagnostic system 10 outputs is by interface device 11 conversions and recompile and be transferred to Master Control Unit 12, Master Control Unit 12 is analyzed acknowledge signal by data acquisition/analysis module 122 and is drawn analysis result, and analysis result is by outdevice 13 outputs.
At length, if the signal level value of onboard diagnostic system 10 is higher than the signal level value of Master Control Unit 12, interface device 11 can have the electrical isolation function, damages Master Control Unit 12 to avoid too high signal level and VPWR Vehicle Power supply voltage under the not normal situation of system.Onboard diagnostic system 10 can use various protocols, mainly comprises K-Line communication modes, variable impulse width modulation/pulse width modulation communication modes and CAN-BUS communication modes,
Interface device 11 can compatible above-mentioned three kinds of communication modes coding, and can between above-mentioned three kinds of communication modes, switch.Fig. 2 is the constructional drawing of interface device 11, sees also Fig. 2, and interface device 11 mainly comprises interface 110, coding decoder 111, gating circuit (figure does not show), microcontroller 112 and the data exchange interface 113 that connects onboard diagnostic system.
The interface 110 that connects onboard diagnostic system comprises the interface of a plurality of employing different agreements, it mainly is signal process buffer memory, the step-down that is used for onboard diagnostic system 10 outputs, send to decoding scheme, decoding scheme is passed the signal transformation of coming become onboard diagnostic system 10 desired signals.The interface 110 that connects onboard diagnostic system also possesses the function that protection onboard diagnostic system 10 is without prejudice under unexpected situation.
The code conversion that coding decoder 111 is used for onboard diagnostic system 10 is Master Control Unit 12 discernible RS232 serial communications codings, and the control and the request signal of the Master Control Unit 12 that the RS232 interface is transmitted are converted to onboard diagnostic system 10 discernible codings.
Gating circuit is used under different communication modes, according to the control signal that Master Control Unit 12 is sent, judges automatically, to select to use different passages.
The effect of microcontroller 112 is the work of comport interface equipment 11 various pieces, and it is certain intelligent that vehicle failure real-time prompting system 100 is possessed.
Data exchange interface 113 can be the RS232 interface, and it is used for the control of Master Control Unit 12 or request signal are transferred to coding decoder 111, and will send to Master Control Unit 12 from the data that coding decoder 111 is obtained.Data exchange interface 113 also can play the function of rate-matched, electrical isolation, metadata cache.
Be appreciated that when interface device 11 is applied to the mono-communication modes merely gating circuit and microcontroller 112 can omit.
Fig. 3 is the software control flow chart of interface device 11, sees also Fig. 3, and interface device 11 carries out the coupling of agreement automatically according to the instruction of upper computer diagnostic software.When a certain definite agreement is mated, on the pairing data bus of agreement, send one group of specific check code earlier, when sending, read signal from bus, signal that reads and the signal that sends are compared,, can think that then the match is successful if identical.
In the present embodiment, interface device 11 can be the ELM327 cake core.Fig. 4 is the cut-away view of ELM327 cake core, the ELM327 chip converts the ODB signal to can be discerned by the ECU (Electrical Control Unit) of automobile (ECU) ascii character by revising the transmission data waveform, thereby realizes that upper computer carries out communication by standard serial port and vehicle.See also Fig. 5 and Fig. 6, Fig. 5 is the circuit design drawing of ELM327 cake core, and wherein the MCP2551 chip is a high-speed CAN communication receiving/transmission device, and it can change into the CAN communication mode communication mode of RS232; Fig. 6 is the definition figure of ELM327 chip pin among Fig. 5.In addition, the title of MCP2551 pin of chip 1～8 is respectively TXD, VSS, VDD, RXD, UREF, CANL, CANH and RS.
Please refer again to Fig. 1, the treater 121 of Master Control Unit 12 can be the ATmega16 micro controller system.The ATmega16 micro controller system comprises 16 bit timing device/counting machines with input capture function.The ATmega16 micro controller system can be caught external event, and gives time mark so that the generation moment of this incident to be described for it.
See also Fig. 7, data acquisition/analysis module 122 comprises serial communication secondary module 1221, asks/reply secondary module 1222, data analysis secondary module 1223, master control/output secondary module 1224.See also Fig. 8, serial communication secondary module 1221 and ask/reply 1222 of secondary modules can realize the mutual transmission of signal.
Serial communication secondary module 1221 is used for the serial port initialization, and promptly the communications parameter to communication two party carries out necessary setting, thereby realizes the normal operation of serial communication.Needing initialized principal parameter is the transmission unit of speed of transmission, the data of data, the inspection of initial and stop bit and check bit.
Ask/reply secondary module 1222 to be used for sending automatically request signal, and receive acknowledge signal.Ask/reply the function of secondary module 1222 to comprise automatic transmission request signal function, error check function, data storage function and to storing the function of data read.
As shown in Figure 8, acknowledge signal enters data analysis secondary module 1223 by data-interface, and 1223 pairs of acknowledge signal data that received of data analysis secondary module are carried out code conversion, and obtains the data that the user understands.Then, the data of 1223 pairs of codings of data analysis secondary module gained are analyzed, and judge whether it there are differences with theoretical value.If there are differences, then the variation range of the signal that has that it's too late by detection signal and rate of change are to short circuit with open circuit and wait some diagnosing malfunctions, and this method is called as the diagnostic method based on signal.For example, the normal operating range of cooling-water temperature sensor is-30 ℃～100 ℃, the output voltage of signal processing circuit changes in 0.3V～4.5V scope during work, if this moment, automobile electronic control unit detected less than 0.3V or greater than the signal value of 4.5V, just can judge that short circuit or open circuit fault have appearred in the water temperature sensor signal system.
Vehicle failure real-time prompting system 100 is based on and carries out analyzing and processing on the basis of diagnostic code, when in a single day vehicle failure real-time prompting system 100 finds diagnostic code in monitor procedure after, immediately the sensor parameters that relates to the diagnostic code aspect is inquired about, and be analyzed with theoretical value, fault cause that obtains and processing suggestion, and analysis result is passed through outdevice 13 export.
Master control/output secondary module 1224 is used to control the output of 13 pairs of analysis results of outdevice, and the way of output of outdevice 13 is literal output or voice output.The control flow of voice output as shown in Figure 9, analysis result process initialization successively, the high byte of determining text size, transmission text size, the low byte of transmission text size, the synthetic initiation command of text, selection text code form reach steps such as sending text to be synthesized successively, pass through voice output at last.The control flow of literal output as shown in figure 10, analysis result successively by initialization, write data and determine steps such as explicit address, show output by LCDs (LCD) at last.
Please refer again to Fig. 1, outdevice 13 can comprise voice broadcast module 131 or screen display module 132.Voice broadcast module 131 is exported analysis result by voice broadcasting modes, screen display module 132 by the literal display mode, voice broadcast has real-time, and literal shows to have persistence, and both combine, the relevant information of fault can be in time grasped reliably, the car owner can be reminded effectively.
Voice broadcast module 131 is used for voice output data acquisition/analysis module 122 and analyzes the analysis result that draws, as information such as diagnostic code, processing suggestions.Voice broadcast module 131 can be XF-S4240 Chinese speech synthesis module, the XF-S4240 module can pass through UART, SPI and three kinds of interfaces of I2C receive text to be synthesized, directly synthesize voice output, in the present embodiment, the XF-S4240 module receives text to be synthesized by the SPI interface.The voice of XF-S4240 module output can not the direct drive loud speaker, has used audio power amplifier circuit between XF-S4240 module and the loud speaker, amplifies sound signal, satisfies the demand of loud speaker.The circuit diagram of voice broadcast module 131 as shown in figure 11, the pin name of XF-S4240 module and functional description see also Figure 12 among Figure 11.
Screen display module 132 is used for display data collection/analysis module 122 and analyzes the analysis result that draws, and it can adopt the ST7920 chip for driving, and its inside carries Chinese word library.What screen display module 132 adopted is that 8 bit parallel interface modes and micro controller system carry out communication.The Liquid Crystal Display (LCD) of screen display module 132 is the wrongly written or mispronounced character of the blue end, and bias light is adjustable.The circuit diagram of screen display module 132 as shown in figure 13.
In sum, the vehicle failure real-time prompting system 100 of the embodiment of the invention can have following advantage:
1, vehicle failure real-time prompting system 100 can conduct interviews to the data and the controlled variable of automobile electronic control unit under motoring condition.
2, automobile is carried out trouble diagnosing, read its diagnostic code.
3, can analyze the reason that fault produces, and provide real-time fault prompting, expeditious measures and concrete repairing hints and tips, reduce car owner's loss.
4, can adopt voice and literal that the failure analysis result is informed the car owner timely.
5, cost is lower, installs with car, is fit to common car owner.
In addition, those skilled in the art also can do other variation in spirit of the present invention, and certainly, the variation that these are done according to spirit of the present invention all should be included in the present invention's scope required for protection.

Claims (8)

1. vehicle failure real-time prompting system, it is used for being connected communication with onboard diagnostic system, it is characterized in that: this vehicle failure real-time prompting system comprises interface device, Master Control Unit and outdevice; This Master Control Unit comprises treater and data acquisition/analysis module, and this treater electrically connects with this interface device and this outdevice respectively; During use, this interface device is connected in this onboard diagnostic system, this Master Control Unit receive from user's request signal by this interface device conversion and recompile and be transferred to this onboard diagnostic system, the acknowledge signal of this onboard diagnostic system output is by this interface device conversion and recompile and be transferred to this Master Control Unit, this Master Control Unit is analyzed this acknowledge signal by this data acquisition/analysis module and is drawn analysis result, and this analysis result is by this outdevice output.
2. vehicle failure real-time prompting as claimed in claim 1 system, it is characterized in that: this treater is the ATmega16 micro controller system.
3. vehicle failure real-time prompting as claimed in claim 1 system, it is characterized in that: this interface device is the ELM327 cake core.
4. vehicle failure real-time prompting as claimed in claim 1 system, it is characterized in that: this interface device also has data exchange interface, and this data exchange interface is the RS232 interface.
5. vehicle failure real-time prompting as claimed in claim 1 system is characterized in that: the coding of the compatible K-Line communication modes of this interface device, variable impulse width modulation/pulse width modulation communication modes and CAN-BUS communication modes.
6. vehicle failure real-time prompting as claimed in claim 1 system, it is characterized in that: the signal level value of this onboard diagnostic system is higher than the signal level value of this Master Control Unit, and this interface device has the electrical isolation function.
7. vehicle failure real-time prompting as claimed in claim 1 system is characterized in that: this data acquisition/analysis module comprises serial communication secondary module, request/reply secondary module, data analysis secondary module, master control/output secondary module.
8. vehicle failure real-time prompting as claimed in claim 1 system, it is characterized in that: this outdevice comprises voice broadcast module or screen display module.
CN2009101094467A 2009-08-18 2009-08-18 Automobile fault real-time prompt system Pending CN101992733A (en)

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Application Number Priority Date Filing Date Title
CN2009101094467A CN101992733A (en) 2009-08-18 2009-08-18 Automobile fault real-time prompt system

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Application Number Priority Date Filing Date Title
CN2009101094467A CN101992733A (en) 2009-08-18 2009-08-18 Automobile fault real-time prompt system

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103010121A (en) * 2011-09-27 2013-04-03 雅马哈发动机株式会社 Vehicle control device, vehicle information monitoring device, vehicle information monitoring system, and vehicle control method
CN103569070A (en) * 2012-08-01 2014-02-12 博世汽车部件(苏州)有限公司 Method and device used for indicating faults
CN105135631A (en) * 2015-10-16 2015-12-09 珠海格力电器股份有限公司 Air conditioner voice broadcasting device, air conditioner and voice broadcasting method
CN108507797A (en) * 2018-03-30 2018-09-07 北京长城华冠汽车技术开发有限公司 Vehicle failure method of real-time and real-time monitoring system
CN108924170A (en) * 2018-09-21 2018-11-30 深圳市领世达科技有限公司 Vehicle data conversion equipment
CN109229073A (en) * 2018-09-25 2019-01-18 深圳市元征科技股份有限公司 A kind of automotive brake pads method for maintaining, system and device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
傅涛: "汽车故障实时提示系统的研制", 《中国优秀硕士学位论文全文数据库 工程科技II辑》 *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103010121A (en) * 2011-09-27 2013-04-03 雅马哈发动机株式会社 Vehicle control device, vehicle information monitoring device, vehicle information monitoring system, and vehicle control method
CN103010121B (en) * 2011-09-27 2015-04-01 雅马哈发动机株式会社 Vehicle control device, vehicle information monitoring device, vehicle information monitoring system, and vehicle control method
CN103569070A (en) * 2012-08-01 2014-02-12 博世汽车部件(苏州)有限公司 Method and device used for indicating faults
CN105135631A (en) * 2015-10-16 2015-12-09 珠海格力电器股份有限公司 Air conditioner voice broadcasting device, air conditioner and voice broadcasting method
CN105135631B (en) * 2015-10-16 2018-07-24 珠海格力电器股份有限公司 Air conditioner voice broadcasting device, air conditioner and voice broadcasting method
CN108507797A (en) * 2018-03-30 2018-09-07 北京长城华冠汽车技术开发有限公司 Vehicle failure method of real-time and real-time monitoring system
CN108924170A (en) * 2018-09-21 2018-11-30 深圳市领世达科技有限公司 Vehicle data conversion equipment
CN108924170B (en) * 2018-09-21 2024-04-23 深圳市领世达科技有限公司 Vehicle data conversion device
CN109229073A (en) * 2018-09-25 2019-01-18 深圳市元征科技股份有限公司 A kind of automotive brake pads method for maintaining, system and device

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Application publication date: 20110330