CN102426452A - Vehicle-mounted system with long-distance diagnostic function - Google Patents
Vehicle-mounted system with long-distance diagnostic function Download PDFInfo
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- CN102426452A CN102426452A CN2011104561374A CN201110456137A CN102426452A CN 102426452 A CN102426452 A CN 102426452A CN 2011104561374 A CN2011104561374 A CN 2011104561374A CN 201110456137 A CN201110456137 A CN 201110456137A CN 102426452 A CN102426452 A CN 102426452A
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Abstract
The invention relates to a vehicle-mounted system with a long-distance diagnostic function, which comprises a diagnosis circuit, a microprocessor and a communication unit, wherein the diagnosis circuit is used for detecting vehicle-mounted equipment; the microprocessor is used for sampling the detection signal of the diagnosis circuit to obtain the state of the diagnosis circuit; the communication unit is used for building communication connection with a service center; and the state of the diagnosis circuit, which is obtained by the microprocessor, is transmitted to the service center. The vehicle-mounted situation can be known at any time and place by the vehicle-mounted system.
Description
Technical field
The present invention relates to vehicle electric field, particularly relate to a kind of onboard system with Remote Diagnosis System.
Background technology
Along with the automobile development of auto-control technology, adopt the system of computer control more and more, vehicle structure also becomes and becomes increasingly complex, the probability that vehicle failure takes place increases, the difficulty of simultaneous faults diagnosis increases, to car owner and maintenance personal require increasingly high.
Along with the high speed development of onboard system, its performance receives more and more users' concern, like antenna, power supply, Low Voltage Differential Signal (the Low-Voltage Differential Signaling of onboard system; Abbreviation " LVDS ") cable, loudspeaker, (the Controller Area Network of controller local area network; Abbreviation " CAN ") whether bus takes place unusually, and the user will know at once that not only service centre also will in time know; And carry out handled, guaranteeing can not influence traffic safety.
Summary of the invention
Technical matters to be solved by this invention provides a kind of onboard system with Remote Diagnosis System, can understand vehicle-mounted situation whenever and wherever possible.
The technical solution adopted for the present invention to solve the technical problems is: a kind of onboard system with Remote Diagnosis System is provided, comprises: diagnostic circuit is used for mobile unit is detected; Microprocessor is used for the detection signal of diagnostic circuit is carried out sampling processing, draws the state of diagnostic circuit; Communication unit is used for communicating with service centre and is connected, and the state transfer of the said diagnostic circuit that said microprocessor is drawn is given service centre.
Said diagnostic circuit comprises power supply diagnostic circuit, antenna diagnostic circuit, microphone diagnostic circuit and control area net network diagnostic circuit.
Said power supply diagnostic circuit comprises: voltage detecting circuit is used to detect power source voltage; Current detection circuit is used to detect the electric current that flows through power supply; Comparator circuit, the supply voltage that is used for detection is obtained is compared with threshold voltage, and the electric current that flows through power supply that detection obtains is compared with threshold current, and the output terminal of said comparator circuit links to each other with microprocessor.
Said antenna diagnostic circuit comprises the antenna and the precision resistance of mutual series connection, and said precision resistance two ends are parallel with differential amplifier circuit, and the output terminal of said differential amplifier circuit links to each other with microprocessor.
Said microphone diagnostic circuit comprises the loudspeaker external interface, and said microphone external interface links to each other with the analog to digital conversion interface of microprocessor through RC network.
Described communication unit is the 3G communication module.
Beneficial effect
Owing to adopted above-mentioned technical scheme; The present invention compared with prior art; Have following advantage and good effect: the present invention diagnoses vehicle-mounted situation through the various diagnostic circuits that are provided with on the onboard system; When diagnostic circuit occurs can reporting service centre through communication unit when unusual, thereby can understand vehicle-mounted situation whenever and wherever possible, guaranteeing can not influence traffic safety.
Description of drawings
Fig. 1 is a block diagram of the present invention;
Fig. 2 is a power supply diagnostic circuit functional-block diagram among the present invention;
Fig. 3 is an antenna diagnostic circuit schematic diagram among the present invention;
Fig. 4 is a microphone diagnostic circuit schematic diagram among the present invention.
Embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment only to be used to the present invention is described and be not used in the restriction scope of the present invention.Should be understood that in addition those skilled in the art can do various changes or modification to the present invention after the content of having read the present invention's instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
The present invention relates to a kind of onboard system with Remote Diagnosis System, as shown in Figure 1, comprising: diagnostic circuit is used for mobile unit is detected; Microprocessor is used for the detection signal of diagnostic circuit is carried out sampling processing, draws the state of diagnostic circuit; Communication unit is used for communicating with service centre and is connected, and the state transfer of the diagnostic circuit that microprocessor is drawn is given service centre.Wherein, communication unit is the 3G communication module, is used for the 2G/3G network and connects and communicate by letter.The 3G module can link to each other with controller through USB interface, thereby is controlled the control of device.Realize high speed data transfer through the 3G module, can transmit sound and data message simultaneously, through multiple media formats such as microprocessor processes image, music, video flowings.Service centre, promptly the customer service backstage is used for service to the user being provided.When certain diagnostic circuit unit occurs when unusual, MCU can report service centre with ERST through the 3G communication unit at once.After the circuit unit abnormal signal that the terminal onboard system sends is received by service centre, in time make corresponding processing, or notify the user to arrive after-sales service, or notify the user to 4S shop replacing etc.
Said diagnostic circuit comprises power supply diagnostic circuit, antenna diagnostic circuit, loudspeaker diagnostic circuit and control area net network diagnostic circuit.The power supply diagnostic circuit is used for the detection to system power supply.The antenna diagnostic circuit is used for the detection to 3G antenna, radio antenna, gps antenna.The loudspeaker diagnostic circuit is used for the detection that connects between system and the car horn.The CAN diagnostic circuit is used for the detection that connects between system and the automobile CAN-bus.
Said power supply diagnostic circuit is as shown in Figure 2, comprising: voltage detecting circuit is used to detect power source voltage; Current detection circuit is used to detect the electric current that flows through power supply; Comparator circuit, the supply voltage that is used for detection is obtained is compared with threshold voltage, and the electric current that flows through power supply that detection obtains is compared with threshold current, and the output terminal of said comparator circuit links to each other with microprocessor.That is to say; When the detected power source voltage of voltage detecting circuit is higher than the threshold voltage of setting; The microprocessor that comparator circuit output signal is learns that supply voltage is higher than threshold voltage; Microprocessor draws this power supply diagnostic circuit and occurs unusually this ERST being reported service centre through the 3G communication unit.In like manner, when current detection circuit detected the electric current that flows through power supply and is higher than threshold circuit, microprocessor drew this power supply diagnostic circuit equally and occurs unusually, and this ERST is reported service centre through the 3G communication unit.
Said antenna diagnostic circuit is as shown in Figure 3, comprises the antenna and the precision resistance of mutual series connection, and said precision resistance two ends are parallel with differential amplifier circuit, and the output terminal of said differential amplifier circuit links to each other with microprocessor.Wherein, said differential amplifier circuit comprises the first triode Q1 and the second triode Q2; The base stage of the said first triode Q1 and the second triode Q2 links to each other; The end of said precision resistance R1 links to each other with the emitter of the said first triode Q1 through two resistance, and the other end links to each other with the emitter of the second triode Q2 through a resistance; The base stage of the said first triode Q1 is also joined with the collector of the first triode Q1; The collector of the said first triode Q1 is through a resistance eutral grounding, and the collector of the said second triode Q2 is through a resistance eutral grounding; The collector of the said second triode Q2 also links to each other with the analog to digital conversion port of described microprocessor through a protective resistance R2, and the two ends of this protective resistance R2 are respectively respectively through a resistance eutral grounding.The first triode Q1 and the second triode Q2 among Fig. 3 are the positive-negative-positive triode.
Pressure drop on the precision resistance detects through the differential amplifier circuit that is added in two ends; And the formation simulating signal is exported to analog to digital converter; Calculate the electric current that flows through precision resistance through pressure drop,, thereby can judge the electric current that flows through antenna because antenna and precision resistance are series connection each other; Corresponding relation between antenna current and the antenna duty is: when electric current was 30mA, the expression antenna was in normal duty; When electric current was 0mA, the expression antenna was in the duty of open circuit; When electric current was 500mA, the expression antenna was in the duty of short circuit.So microprocessor just can be learnt duties such as 3G antenna, radio antenna, gps antenna, and when appearance was unusual, microprocessor can report service centre with ERST through the 3G communication unit at once.
Said microphone diagnostic circuit is as shown in Figure 4, comprises the microphone external interface, and said microphone external interface links to each other with the analog to digital conversion interface of microprocessor through RC network.Wherein, said RC network comprises a resistance R 3 and a capacitor C 1; Said resistance R 3 is connected with capacitor C 1 each other; The end that said resistance R 3 does not link to each other with capacitor C 1 links to each other with external interface, and the analog to digital conversion interface of said microprocessor is connected between said resistance R 3 and the capacitor C 1.The Standard resistance range of said resistance R 3 is 95k-105k Ω, and the appearance value of said capacitor C 1 is 82PF.
Receive the analog to digital conversion interface (MIC_DIAG network) of microprocessor on the pin of microphone external interface (MIC_IN+, MIC_IN-) interface through a RC network; Through judging the level on the analog to digital conversion interface; Can judge the duty of microphone; The impedance of supposing microphone is 1.6K, and level with the corresponding situation of state is on the analog to digital conversion interface of microprocessor: when level was 1V, the expression microphone was in normal duty; When level was 0V, the expression microphone was in the duty of open circuit; When level representes that microphone is in the duty of short circuit during for 1.8V.So microprocessor just can be learnt the duty of microphone, and when appearance was unusual, microprocessor can report service centre with ERST through the 3G communication unit at once.
Control area net network diagnostic circuit sends the instruction request reading of data through control module, when reading of data, should reduce offered load.In some vehicle, have same request instruction of a plurality of control module responses.In addition, certain control module can be sent a plurality of responses and given single request instruction, and any test equipment of sending request instruction must have the ability to receive a plurality of responses.Onboard system all should respond request instruction.A plurality of responses possibly require the response that makes all modules all have sufficient time to the visit data link and send them from single request instruction.(for example 250ms) if at the appointed time, testing tool is not received any response, and then testing tool is not thought and can be received any response (then expression occur ERST) again; Perhaps testing tool has received a response, and then testing tool is thought not receiving other response again.This moment, testing tool can be with receiving response or do not receive that response is sent to microprocessor and handles that when appearance was unusual, microprocessor can report service centre with ERST through the 3G communication unit at once.
The present invention diagnoses vehicle-mounted situation through the various diagnostic circuits that are provided with on the onboard system, when diagnostic circuit occurs can reporting service centre through communication unit when unusual, thereby can understand vehicle-mounted situation whenever and wherever possible, and guaranteeing can not influence traffic safety.
Claims (6)
1. the onboard system with Remote Diagnosis System is characterized in that, comprising: diagnostic circuit is used for mobile unit is detected; Microprocessor is used for the detection signal of diagnostic circuit is carried out sampling processing, draws the state of diagnostic circuit; Communication unit is used for communicating with service centre and is connected, and the state transfer of the said diagnostic circuit that said microprocessor is drawn is given service centre.
2. the onboard system with Remote Diagnosis System according to claim 1 is characterized in that, said diagnostic circuit comprises power supply diagnostic circuit, antenna diagnostic circuit, microphone diagnostic circuit and control area net network diagnostic circuit.
3. the onboard system with Remote Diagnosis System according to claim 2 is characterized in that, said power supply diagnostic circuit comprises: voltage detecting circuit is used to detect power source voltage; Current detection circuit is used to detect the electric current that flows through power supply; Comparator circuit, the supply voltage that is used for detection is obtained is compared with threshold voltage, and the electric current that flows through power supply that detection obtains is compared with threshold current, and the output terminal of said comparator circuit links to each other with microprocessor.
4. the onboard system with Remote Diagnosis System according to claim 2; It is characterized in that; Said antenna diagnostic circuit comprises the antenna and the precision resistance of mutual series connection, and said precision resistance two ends are parallel with differential amplifier circuit, and the output terminal of said differential amplifier circuit links to each other with microprocessor.
5. the onboard system with Remote Diagnosis System according to claim 2 is characterized in that, said microphone diagnostic circuit comprises the microphone external interface, and said microphone external interface links to each other with the analog to digital conversion interface of microprocessor through RC network.
6. according to the described onboard system of arbitrary claim among the claim 1-5, it is characterized in that described communication unit is the 3G communication module with Remote Diagnosis System.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104561374A CN102426452A (en) | 2011-12-30 | 2011-12-30 | Vehicle-mounted system with long-distance diagnostic function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104561374A CN102426452A (en) | 2011-12-30 | 2011-12-30 | Vehicle-mounted system with long-distance diagnostic function |
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| CN102426452A true CN102426452A (en) | 2012-04-25 |
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| CN2011104561374A Pending CN102426452A (en) | 2011-12-30 | 2011-12-30 | Vehicle-mounted system with long-distance diagnostic function |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103546512A (en) * | 2012-07-13 | 2014-01-29 | 上海博泰悦臻电子设备制造有限公司 | Wireless vehicle diagnosis method and system |
| CN107677977A (en) * | 2017-11-18 | 2018-02-09 | 广西电网有限责任公司电力科学研究院 | A kind of long-distance monitoring method of portable electric energy mass-synchrometer |
| CN108255091A (en) * | 2016-12-29 | 2018-07-06 | 佛山市顺德区美的电热电器制造有限公司 | A kind of control method and device |
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| CN201926924U (en) * | 2011-01-04 | 2011-08-10 | 福建星网锐捷通讯股份有限公司 | Remote vehicle-mounted diagnosis and positioning system based on CAN bus and K-line |
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2011
- 2011-12-30 CN CN2011104561374A patent/CN102426452A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2784937Y (en) * | 2005-03-31 | 2006-05-31 | 彭金明 | Intelligent voltage sensor |
| CN200953469Y (en) * | 2006-09-26 | 2007-09-26 | 石家庄国耀电子科技有限公司 | Electric protector for vehicular equipment |
| CN201173971Y (en) * | 2008-02-01 | 2008-12-31 | 深圳市赛格导航科技股份有限公司 | Vehicle mounted positioning terminal having remote fault detection function |
| CN101782629A (en) * | 2009-01-21 | 2010-07-21 | 清华大学 | Battery system monitoring method and device based on OBD-II |
| CN101938685A (en) * | 2010-04-20 | 2011-01-05 | 惠州市德赛西威汽车电子有限公司 | Automatic diagnosis method of automobile sound loudspeaker and antenna |
| CN201926924U (en) * | 2011-01-04 | 2011-08-10 | 福建星网锐捷通讯股份有限公司 | Remote vehicle-mounted diagnosis and positioning system based on CAN bus and K-line |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103546512A (en) * | 2012-07-13 | 2014-01-29 | 上海博泰悦臻电子设备制造有限公司 | Wireless vehicle diagnosis method and system |
| CN108255091A (en) * | 2016-12-29 | 2018-07-06 | 佛山市顺德区美的电热电器制造有限公司 | A kind of control method and device |
| CN107677977A (en) * | 2017-11-18 | 2018-02-09 | 广西电网有限责任公司电力科学研究院 | A kind of long-distance monitoring method of portable electric energy mass-synchrometer |
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Application publication date: 20120425 |