CN101807068B - Universal bus parallelism-based vehicle diagnosis system and method - Google Patents

Universal bus parallelism-based vehicle diagnosis system and method Download PDF

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CN101807068B
CN101807068B CN201010114296.1A CN201010114296A CN101807068B CN 101807068 B CN101807068 B CN 101807068B CN 201010114296 A CN201010114296 A CN 201010114296A CN 101807068 B CN101807068 B CN 101807068B
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software
module
diagnosis
automobile
host computer
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CN101807068A (en
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刘均
钟益斌
夏金安
刘刚
燕威
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Shenzhen Launch Software Co Ltd
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Shenzhen Launch Software Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/02Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

Abstract

The invention relates to a universal bus parallelism-based vehicle diagnosis system and a universal bus parallelism-based vehicle diagnosis method. The system comprises an upper computer and a plurality of lower computers connected with the upper computer in parallel through data buses; system software and a plurality pieces of application software with different functions are configured in the upper computer; the upper computer is provided with communication interfaces; the plurality of lower computers are all in electric connection with the communication interfaces through the data buses; the lower computers are a plurality of functional control modules with different functions; different functional control modules correspond to application software with different functions in the upper computer; a data interface is formed in each of the functional control modules; and the functional control modules are respectively connected with diagnosis interfaces of a vehicle to be diagnosed through the respective data interface. The upper computer is in parallel connection with the plurality of the lower computers through USB data buses; and the upper computer is communicated with the lower computers according to the selection of a user and controls the lower computers to finish a vehicle fault diagnosis task, so that the shortage of integrated vehicle fault diagnosis equipment can be overcome, the requirement on diversification is met, and the occasions of large data volume and high speed requirement in a high-level function of vehicle fault diagnosis can be met.

Description

Based on automotive diagnostic system and the method for universal bus parallelism
Technical field
The present invention relates to a kind of automotive diagnostic system and method, particularly relate to a kind of automotive diagnostic system based on universal bus parallelism and method.
Background technology
Automobile is the most familiar, the modal vehicles of people, and it plays very important effect in people's life.Although automobile varying quality, various informative, they are all inevitably various fault in use, needs got rid of or repair in time.Along with the development of society and the progress of science and technology, the design and production of automobile also more and more have employed electronic technology, automatic technology and electronic computer technology, this makes the automaticity of automobile more and more higher on the one hand, performance is more superior, flexibly more convenient to operate, also have higher requirement to auto repair and detection on the other hand, traditional craft monitoring and maintenance mode can not meet the maintenance needs of new automobile.
Along with the develop rapidly of automobile automatic control technology, adopt the systems grow of conputer controlled many, vehicle structure also becomes increasingly complex, and the fault diagnosis of automobile also becomes and becomes increasingly complex, thereupon, the demand of auto repair technician to fault detection system for automobile is increasing.Under this requirement drive, equipment development business is proposed various, that appearance style is different fault detection system for automobile, these equipment have a common feature, adopt the structure of integration exactly, display screen, operating means, communication module, control module, memory storage all concentrate in a hardware configuration.In the view of auto repair technician, these equipment are all the autonomous devices be used alone, by device systems and reside in the automobile failure diagnosis software in memory storage support under, complete the fault diagnosis task to automobile electric control system.The equipment of these integral structures can complete automobile failure diagnosis function really.The detection of automobile, the equipment of diagnosis aspect are also of a great variety, and price is not cheap.But current functions of the equipments are mostly more single, and method of operating is different, sometimes maintenance technician needs to use several equipment to carry out comprehensive diagnos simultaneously and just can find problem place.Like this, not only bring very high equipment cost and training cost to maintenance depot, and when using very, be difficult to the synchronous coordination reaching multiple equipment.
Summary of the invention
The object of the invention is to, a kind of automotive diagnostic system based on universal bus parallelism is provided, this system is by adopting the structural design of upper and lower computer, the deficiency of all-in-one car failure diagnosis apparatus can be solved, for auto repair technician provides polygamy to put selection, meet the occasion that in automobile failure diagnosis Premium Features, data volume is large, high to rate request;
Another object of the present invention is to, a kind of vehicle diagnosis method based on universal bus parallelism is provided, the method is by adopting the distributed frame design of upper and lower computer, host computer is connected by usb data bus with slave computer, for auto repair technician provides multiple use configuration mode, meet its diversified demand.
For achieving the above object, the invention provides a kind of automotive diagnostic system based on universal bus parallelism, it comprises: host computer, and by several slave computers of data bus and this host computer parallel join, the application software of system software and multiple difference in functionality is provided with in this host computer, host computer is provided with communication interface, several slave computers are all electrically connected by data bus and communication interface, this slave computer is several functional control modules with difference in functionality, different functional control modules in host computer to the application software that should have difference in functionality, data-interface is equipped with in this each functional control module, the diagnose interface that this functional control module is cut steam on car respectively by respective data-interface and follow-up is connected.
System software in described host computer is Windows/WinCE system software, application software is run based under this Windows/WinCE system environments, and this application software comprises self-defined desktop programs, automobile diagnostic software, automobile oscilloscope software, car engine ignition analysis software, automobile sensor simulation & testing software, multiple meter for automobile software, four-wheel aligner software, repair information storehouse, the Internet access program and printer software.
Truck type choice program, download program of lower computer, Read fault coded message program, clear malfunction coding program, time data stream information programme, motion test program, Flash ECU program and functional application is comprised in described automobile diagnostic software.
Include USB in described Windows/WinCE system software to drive, slave computer drives to utilize between usb data bus and host computer by this USB and carries out exchanges data.
Also comprise main control module, public module, communication protocol module, Data Analysis Services module and control command/data acquisition module in described host computer, each slave computer feeds back to host computer by be cut steam by the follow-up of the collection information of vehicles of car of communication interface.
Described slave computer is several functional control modules with difference in functionality, and the diagnose interface that this slave computer is cut steam on car by a diagnostics lines and follow-up is connected; This functional control module comprises one or more combinations in automobile functional diagnosis box, engine ignition analysis oscillograph, Sensor Analog Relay System multimeter, automobile four-wheel positioning box and printer.
Diagnosis box microprocessing unit is provided with in described automobile functional diagnosis box, the several communication module be electrically connected with this diagnosis box microprocessing unit and diagnosis communication interface, the diagnose interface that automobile functional diagnosis box is cut steam on car by this diagnosis communication interface and follow-up is connected, this several communication module comprises USB/ bluetooth communication module, CAN communication module, K_Line communication module, and PWM/VPW communication module, this several communication module is all electrically connected with diagnosis box microprocessing unit, also be connected to a logic between K_Line communication module and diagnosis box microprocessing unit and select module, and lever selection module, further, also comprise IO in this automobile functional diagnosis box and select module and power module, this IO selects module to be electrically connected with CAN communication module, K_Line communication module, PWM/VPW communication module and diagnosis communication interface respectively, power module selects module and diagnosis communication interface to be electrically connected with USB/ bluetooth communication module, diagnosis box microprocessing unit, CAN communication module, IO respectively, this diagnosis communication interface is OBDII-16 communication interface, and this OBDII-16 communication interface one end is also electrically connected with diagnosis box microprocessing unit.
Further, the present invention also provides a kind of vehicle diagnosis method based on universal bus parallelism, and the method comprises:
Step 1, the host computer providing to have a Windows/WinCE system software, establish the application software of multiple difference in functionality in this host computer;
Step 2, provide several slave computers, this slave computer is several functional control modules with difference in functionality, different functional control modules in host computer to the application software that should have difference in functionality;
Step 3, as required, by the slave computer of difference in functionality respectively by usb data bus and host computer parallel join, and the diagnose interface that this slave computer is cut steam on car by diagnostics lines and follow-up to be connected;
Step 4, the system software run in host computer, have multinomial different function process in this system software operational process;
Step 5, user select the function process corresponding with slave computer function to operate from above-mentioned multiple function process;
Step 6, start selected by function process, host computer performs data acquisition by sending control command to slave computer, and cut steam by the follow-up gathered by the diagnose interface information of vehicles of car of slave computer returns to host computer;
Step 7, host computer, in conjunction with this information of vehicles, are run by function process and analyze the diagnostic result drawing this function of automobile.
Include USB in described Windows/WinCE system software to drive, slave computer drives to utilize between usb data bus and host computer by this USB and carries out exchanges data; The application software that function processes different in system software operational process is corresponding different, the data in different function processes can be shared mutually; This application software comprises self-defined desktop programs, automobile diagnostic software, automobile oscilloscope software, car engine ignition analysis software, automobile sensor simulation & testing software, multiple meter for automobile software, four-wheel aligner software, repair information storehouse, the Internet access program and printer software; Truck type choice program, download program of lower computer, Read fault coded message program, clear malfunction coding program, time data stream information programme, motion test program, Flash ECU program and functional application is comprised again in this automobile diagnostic software.
Described slave computer is several functional control modules with difference in functionality, and the diagnose interface that this slave computer is cut steam on car by a diagnostics lines and follow-up is connected, this functional control module comprises one or more combinations in automobile functional diagnosis box, engine ignition analysis oscillograph, Sensor Analog Relay System multimeter, automobile four-wheel positioning box and printer, wherein, diagnosis box microprocessing unit is provided with in automobile functional diagnosis box, the several communication module be electrically connected with this diagnosis box microprocessing unit and diagnosis communication interface, the diagnose interface that automobile functional diagnosis box is cut steam on car by this diagnosis communication interface and follow-up is connected, this several communication module comprises USB/ bluetooth communication module, CAN communication module, K_Line communication module, and PWM/VPW communication module, this several communication module is all electrically connected with diagnosis box microprocessing unit, also be connected to a logic between K_Line communication module and diagnosis box microprocessing unit and select module, and lever selection module, further, also comprise IO in this automobile functional diagnosis box and select module and power module, this IO selects module to be electrically connected with CAN communication module, K_Line communication module, PWM/VPW communication module and diagnosis communication interface respectively, power module selects module and diagnosis communication interface to be electrically connected with USB/ bluetooth communication module, diagnosis box microprocessing unit, CAN communication module, IO respectively, this diagnosis communication interface is OBDII-16 communication interface, and this OBDII-16 communication interface one end is also electrically connected with diagnosis box microprocessing unit.
Beneficial effect of the present invention: the automotive diagnostic system based on universal bus parallelism provided by the invention and method, it is by adopting the structural design of upper and lower computer, realize parallel join by usb data bus between host computer and several slave computers, slave computer is connected by diagnostics lines with the diagnose interface on automobile; Host computer provides user interface, mutual and the information display function of completing user, and according to the selection of user and slave computer communication, control slave computer and complete automobile failure diagnosis task, slave computer has been responsible for the data communication task with vehicle diagnosis interface reality, not only can solve the deficiency of all-in-one car failure diagnosis apparatus, for auto repair technician provides polygamy to put selection, meet its diversified demand, the occasion that in automobile failure diagnosis Premium Features, data volume is large, high to rate request can also be met.
In order to further understand feature of the present invention and technology contents, refer to following detailed description for the present invention and accompanying drawing, but accompanying drawing only provides reference and explanation use, is not used for being limited the present invention.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, by the specific embodiment of the present invention describe in detail, will make technical scheme of the present invention and other beneficial effects apparent.
In accompanying drawing,
Fig. 1 is the structural representation of the automotive diagnostic system that the present invention is based on universal bus parallelism;
Fig. 2 is the physical arrangement schematic diagram of automotive diagnostic system one specific embodiment that the present invention is based on universal bus parallelism;
Fig. 3 is the functional block diagram of automotive diagnostic system one specific embodiment that the present invention is based on universal bus parallelism;
Fig. 4 is the whole software structure schematic diagram of automotive diagnostic system one specific embodiment that the present invention is based on universal bus parallelism;
Fig. 5 is the functional realiey schematic diagram of host computer one embodiment in the present invention;
Fig. 6 is the hardware configuration schematic diagram of automobile functional diagnosis box in the present invention;
Fig. 7 is the Principle of Communication figure in the present invention between host computer and automobile functional diagnosis box;
Fig. 8 is that in the present invention, engine ignition analyzes oscillographic hardware configuration schematic diagram;
Fig. 9 is the hardware configuration schematic diagram of Sensor Analog Relay System multimeter in the present invention;
Figure 10 is the hardware configuration schematic diagram of printer in invention;
Figure 11 is the schematic flow sheet of the vehicle diagnosis method that the present invention is based on universal bus parallelism.
Embodiment
For further setting forth the present invention for the technological means that realizes predetermined object and take and effect, refer to following detailed description for the present invention and accompanying drawing, believe object of the present invention, feature and feature, should obtain thus going deep into and concrete understanding, but accompanying drawing only provides reference and explanation use, is not used for being limited the present invention.
As Figure 1-4, the invention provides a kind of automotive diagnostic system based on universal bus parallelism, it comprises: host computer 2, and by several the slave computers 4 of data bus 3 with this host computer 2 parallel join, the application software 24 of system software 23 and multiple difference in functionality is provided with in this host computer 2, host computer 2 is provided with communication interface 22, several slave computers 4 are all electrically connected by data bus 3 and communication interface 22, this data bus 3 is general usb data bus 3, here we can select shielding line, its actuating signal and power supply are undertaken by a kind of cable of four lines.
Wherein, host computer 2 is responsible for user interactions, interface display and the Communication Control to slave computer 4, is provided with Windows/WinCE system software 23 in this host computer 2, and application software 24 is run based under this Windows/WinCE system environments.Include USB in this Windows/WinCE system software 23 to drive, slave computer 4 drives to utilize between usb data bus 3 and host computer 2 by this USB and carries out exchanges data.In the present invention, host computer 2 can be PC people's host computer or notebook computer, so not only existing resource can be utilized, and while completing automobile failure diagnosis task, the individual affair of oneself can also be processed, and effectively utilize the advantage on the processing power of PC people's host computer or notebook computer and storage space.As a kind of selectivity embodiment of the present invention, this application software 24 comprises self-defined desktop programs, automobile diagnostic software 242, automobile oscilloscope software 243, car engine ignition analysis software 244, automobile sensor simulation & testing software 245, multiple meter for automobile software 246, four-wheel aligner software 247, repair information storehouse, the Internet access program and printer software 248.Truck type choice program, download program of lower computer, Read fault coded message program, clear malfunction coding program, time data stream information programme, motion test program, Flash ECU program and functional application can be comprised again in this automobile diagnostic software 242.Due to the setting of above-mentioned application software 24, make this automotive diagnostic system have numerous application functions (shown in Fig. 3) such as diagnosis box 201, Sensor Analog Relay System 202, multimeter 203, engine ignition analysis 204, printer 205, oscillograph 206, network function 207 and repair information storehouse 208 simultaneously.Further, as shown in Figure 4, include main control module 251, public module 252, communication protocol module 253, Data Analysis Services module 254 and control command/data acquisition module 255 in host computer 2 system, slave computer 4 feeds back to host computer 2 by be cut steam by the follow-up of the collection information of vehicles of car of communication interface 22.Automotive diagnostic system based on universal bus parallelism of the present invention is based on self-defining communications protocol, host computer 2 is by calling the communication function in public module 252 communication storehouse, communication is carried out with slave computer 4 by the USB/Bluetooth/CommPort communication interface 257 of Communication Layer 256, primary and secondary structure is adopted between several slave computers 4 and host computer 2, the originating end of communication is host computer 2, for the control command sent, slave computer 4 takes charge of the explanation and executable operations, when performing data acquisition session, the data gathered will return to host computer and carry out analyzing and processing, and the structure (numerical value or waveform) of process is shown on display interface.In software running process, this automobile diagnostic software 242 is run as host process, the function process that the numerous vehicle diagnosis function programs in it are relatively different respectively, keeps relatively independent between different function processes, but its look & feel run is unified, mainly completes data processing and display.Especially, the data between this different function process can be shared mutually, and the data of this part leave in internal memory in a sharing data area of specifying with certain format, operate for other function process.
In the present invention, slave computer 4 is for having several functional control modules of difference in functionality, different functional control modules in host computer 2 to the application software that should have difference in functionality, be equipped with data-interface 40 and power interface in this each functional control module, the diagnose interface 6 that this functional control module is cut steam on car by a diagnostics lines 62 and follow-up respectively by respective data-interface is connected.In the embodiment of the present invention, this functional control module can comprise one or more combinations in automobile functional diagnosis box 41, engine ignition analysis oscillograph 42, Sensor Analog Relay System multimeter 43, automobile four-wheel positioning box 44 and printer 45, this each functional control module can independently be connected on host computer 2, and this several functional control module and host computer 2 are all powered by external power supply 8.Host computer 2, by sending control command to automobile functional diagnosis box 41, starts automobile diagnostic software 242; By sending, control command analyzes oscillograph 42 to engine ignition to host computer 2, engine ignition analyzes oscillograph 42, Sensor Analog Relay System multimeter 43 or automobile four-wheel positioning box 44, to perform data acquisition, and accept to gather the data returned, it is analyzed, by the result of analysis with plotting mode, show in interface display region; Host computer 2 exports to perform setting data to Sensor Analog Relay System multimeter 43 by sending control command, is shown by the data waveform of output in interface display region simultaneously.During above-mentioned upper and lower computer communication, carry out data interaction according to designated communication word and communication format, its rules of interaction is: host computer sends data, and slave computer must feed back it, otherwise be considered as Communications failure (signal wiring mistake), out of Memory obtains from feedback information.This upper and lower computer composition host-guest architecture, slave computer just performs acquisition tasks after receiving the control command that host computer sends.
As shown in Figure 5, for the functional realiey schematic diagram of host computer in the present invention 2 one embodiment, this host computer 2 comprises the communication interface 22 of the microprocessor 20 of a multiple operating system, the several driving circuits 211,212, real-time timepiece chip (RTC) 213 be electrically connected with this microprocessor 20, several peripheral hardware; This driving circuit 211,212 connects liquid crystal interface 210 and the hummer 220 that contains touch-screen respectively, and this communication interface 22 comprises: USB HUB interface 222, RS232 interface 223, SDIO interface 224, CF interface 225 and jtag interface 226.In embodiments of the present invention, this microprocessor 20 uses OMAP3503 processor, and the CPU of this OMAP3503 processor is ARM Cortex-A8, and its dominant frequency, up to 600MHz, can complete at a high speed complicated data processing and computing.This microprocessor 20 is preset with test point (not shown), external detection equipment is debugged this test point by jtag interface 226.
As shown in Figure 6, diagnosis box microprocessing unit 410 is provided with in automobile functional diagnosis box 41 of the present invention, the several communication module be electrically connected with this diagnosis box microprocessing unit 410 and diagnosis communication interface 411, the diagnose interface of being cut steam on car by this diagnosis communication interface 411 and follow-up in automobile functional diagnosis box 41 is connected, this several communication module comprises USB/ bluetooth communication module 412, CAN communication module 413, K_Line communication module 414, and PWM/VPW communication module 415, this several communication module is all electrically connected with diagnosis box microprocessing unit 410, also be connected to a logic between K_Line communication module 414 and diagnosis box microprocessing unit 410 and select module 416, and lever selection module 417.Further, also comprise IO in automobile functional diagnosis box 41 and select module 418 and power module 419, this IO selects module 418 to be electrically connected with CAN communication module 413, K_Line communication module 414, PWM/VPW communication module 415 and diagnosis communication interface 411 respectively, and power module 419 selects module 418 and diagnosis communication interface 411 to be electrically connected with USB/ bluetooth communication module 412, diagnosis box microprocessing unit 410, CAN communication module 413, IO respectively.Wherein, diagnosis box microprocessing unit 410 is main control modules, it is used for, and completion logic is selected, IO selects, the realization of Automatic level control box communications protocol, diagnosis communication interface 411 is OBDII-16 communication interface, this OBDII-16 communication interface one end is also electrically connected with diagnosis box microprocessing unit 410, and this OBDII-16 communication interface is used for the connection with OBDII standard automobile diagnose interface.Several communication module can meet the requirement of common automobile failure diagnosis communications protocol Physical layer, wherein, USB/ bluetooth communication module 412 is used for realizing the diagnostic function of SAE/J1939 agreement in order to realize USB between automobile functional diagnosis box 41 and host computer 2 or Bluetooth transmission CAN communication module 413; K_Line communication module 414 is used for realizing the diagnostic function of ISO9141-2, KWP2000, BOSCH agreement; PWM/VPW communication module 415 is used for realizing the diagnostic function of SAE J1850PWM/VPW agreement.Logic selects module 416 to have positive and negative logic selection function, and it is used for realizing the positive/negative logic of K-Line communication and selects; Its 417 diagnosis that can meet 12/24V battery system of lever selection module, possesses 12V/24V lever selection function, and it is used for realizing the communication lever selection of K-Line communication; IO selects module 418 to be used for realizing the selection of diagnosis communication input and output pin, and the IO of IO and the K_Line communication module 414 of its CAN communication module 413 is optional arbitrarily, is realized the diagnosis of all OBDII by OBDII-16 communication interface; Power module 419 by the voltage of 12/24V voltage transformation required for automobile functional diagnosis box 41 from vehicle diagnosis interface, for other functional module.
As shown in Figure 7, for host computer in the present invention and as slave computer automobile functional diagnosis box between Principle of Communication figure, this figure clearly can illustrate that data are core buffers how in host computer 2 and carry out transmitting between automobile functional diagnosis box 41: because usb data bus is for the communication service between the automobile diagnostic software 242 of host computer 2 and USB application apparatus, to different mutual between user from application, this USB application apparatus has different requirements to data stream.In the present invention, the USB comprised in Windows/WinCE system software 23 drives and uses for the communication between host computer 2 and automobile functional diagnosis box 41 provides better overall bus, and it allows various different data stream to enter an automobile functional diagnosis box 41 independently of each other.Often kind of communication stream all takes certain bus access method to complete the communication between automobile diagnostic software 242 on host computer 2 and automobile functional diagnosis box 41, each communication terminates at certain end points of automobile functional diagnosis box 41, and the different end points of different automobile functional diagnosis box are for distinguishing different communication streams.The interior automobile diagnostic software 242 of host computer 2 is communicated with automobile functional diagnosis box 41 by a series of communication stream, this a series of communication stream is selected by the software and hardware deviser of automobile functional diagnosis box 41, makes this automobile functional diagnosis box 41 can transmit the character provided by usb data bus.
As shown in Figure 8, in the present invention, engine ignition analysis oscillograph 42 comprises a programmable logic controller (PLC) (FPGA) 421, in this programmable logic device (PLD) 421, there is peak detection block, control register module, to set out module, channel control module, sample frequency generation module, and bus management module, this FPGA is changed by A/D and is electrically connected with a signal condition passage 422 respectively, 423, this FPGA is also electrically connected with display-memory 424, random access memory 425 (RAM-random accessmemory), ARM (Advanced RISC Machines) or DSP microprocessor 426, and USB2.0 interface 427, this USB2.0 interface 427 is inner to be electrically connected with microprocessor 426, microprocessor 426 is also provided with RS232 interface 428.This two signal conditions passage 422,423 is all electrically connected with FPGA by trigger circuit 429, this two signal conditions passage 422,423 is formed primarily of links such as impedance transformation, decay, amplification, inside and outside synchronous amplification switchings, and it completes the bandwidth system to the program-controlled conditioning of input simulating signal.This engine ignition analyzes oscillograph 42 completes passage control, data acquisition control, the reading of sampled data, Waveform storage and display, the sampled data function such as split, calculating by the data processing of ARM or DSP microprocessor 426, finally the data that signal processing is sent here are shown over the display, being arranged by keyboard enables waveform carry out display analysis according to the requirement of user of service, and presses operation requirements to a system biography main signal.
As shown in Figure 9, in the present invention, Sensor Analog Relay System multimeter 43 comprises a micro-control unit (MCU) or programmable logic controller (PLC) (FPGA) 432, electric connection one multimeter 434, sensor assembly 435 on it, this MCU/FPGA is electrically connected with the power supply 436 of 12V/24V and usb data interface 437 respectively, and USB data line is connected on communication interface with pc 22 by this usb data interface 437.This Sensor Analog Relay System multimeter 43 mainly realizes two parts function, and one is the function of multimeter of vehicle, realizes the measurement to signals of vehicles; It two is the sensor signal of the analog functuion of sensor, main analog vehicle, and this sensor signal is mainly the unlike signals such as level signal, frequency signal and impedance signal.The order data that this Sensor Analog Relay System multimeter 43 is transmitted by communication interface with pc 22 operates, then the data of acquisition are passed to host computer 2 with usb data stream in form, carries out Fumction display by the program in host computer 2 application software 24.
As shown in Figure 10, in the present invention, printer 45 carries out on-line communication by the USB interface 452 of standard with host computer 2, and it also can carry out on-line communication with the PC with standard USB interface.The printer module 450 of this printer 45 comprises communication unit 454, control module 455, Power Management Unit 456 and printhead 457 4 parts altogether.The application software 24 of host computer 2 is set up online by the USB interface 452 of communication unit 454 with the MCU of control module 455, and transmits control command or print data.The software of printer module 450 is analyzed after obtaining the data that host computer 2 transmits, if control command, then does corresponding action; If print data, then take out the corresponding graphemic code of each character, and change, the row buffer being then sent to printhead 457 prints.
As shown in figure 11, the present invention also provides a kind of vehicle diagnosis method based on universal bus parallelism, and the method comprises:
Step 1, the host computer providing to have a Windows/WinCE system software, establish the application software of multiple difference in functionality in this host computer.This host computer can be PC people's host computer or notebook computer, so not only existing resource can be utilized, and while completing automobile failure diagnosis task, the individual affair of oneself can also be processed, and effectively utilize the advantage on the processing power of PC people's host computer or notebook computer and storage space.Include USB in described Windows/WinCE system software to drive, slave computer drives to utilize between usb data bus and host computer by this USB and carries out exchanges data.
Step 2, provide several slave computers, this slave computer is several functional control modules with difference in functionality, different functional control modules in host computer to the application software that should have difference in functionality.As selectivity embodiment of the present invention, this functional control module comprises one or more combinations in automobile functional diagnosis box, engine ignition analysis oscillograph, Sensor Analog Relay System multimeter, automobile four-wheel positioning box and printer.Wherein, diagnosis box microprocessing unit is provided with in automobile functional diagnosis box, the several communication module be electrically connected with this diagnosis box microprocessing unit and diagnosis communication interface, the diagnose interface that automobile functional diagnosis box is cut steam on car by this diagnosis communication interface and follow-up is connected, this several communication module comprises USB/ bluetooth communication module, CAN communication module, K_Line communication module, and PWM/VPW communication module, this several communication module is all electrically connected with diagnosis box microprocessing unit, also be connected to a logic between K_Line communication module and diagnosis box microprocessing unit and select module, and lever selection module, further, also comprise IO in this automobile functional diagnosis box and select module and power module, this IO selects module to be electrically connected with CAN communication module, K_Line communication module, PWM/VPW communication module and diagnosis communication interface respectively, power module selects module and diagnosis communication interface to be electrically connected with USB/ bluetooth communication module, diagnosis box microprocessing unit, CAN communication module, IO respectively, this diagnosis communication interface is OBDII-16 communication interface, and this OBDII-16 communication interface one end is also electrically connected with diagnosis box microprocessing unit.
Step 3, as required, by the slave computer of difference in functionality respectively by usb data bus and host computer parallel join, and the diagnose interface that this slave computer is cut steam on car by diagnostics lines and follow-up to be connected.
Step 4, the system software run in host computer, have multinomial different function process in this system software operational process.The application software that function processes different in system software operational process is corresponding different, the data in different function processes can be shared mutually; This application software comprises self-defined desktop programs, automobile diagnostic software, automobile oscilloscope software, car engine ignition analysis software, automobile sensor simulation & testing software, multiple meter for automobile software, four-wheel aligner software, repair information storehouse, the Internet access program and printer software; Truck type choice program, download program of lower computer, Read fault coded message program, clear malfunction coding program, time data stream information programme, motion test program, Flash ECU program and functional application is comprised again in this automobile diagnostic software.
Step 5, user select the function process corresponding with slave computer function to operate from above-mentioned multiple function process.Wherein, the data between different function processes can be shared mutually, and the data of this part leave in internal memory in a sharing data area of specifying with certain format, operate for other function process.Wherein, host process can start arbitrarily each function process, and each function process also can start other function process as required.In the present invention, user can select separately certain function process to carry out work according to the needs of oneself from host process, also other function process can be selected in certain function process process, and from sharing data area, recall shared data show, comprehensive reference, thus draw diagnostic result fast.
Step 6, start selected by function process, host computer performs data acquisition by sending control command to slave computer, and cut steam by the follow-up gathered by the diagnose interface information of vehicles of car of slave computer returns to host computer.Function according to required test selects corresponding function process, and run the application program of function corresponding to this function process, utilize the communication module in slave computer from treating that diagnosis vehicle obtains information of vehicles, and send this information of vehicles to host computer by USB/ bluetooth communication module.In embodiments of the present invention, host computer, by sending control command to diagnostic function box, starts automobile diagnostic software; By sending, control command analyzes oscillograph to engine ignition to host computer, engine ignition analyzes oscillograph, Sensor Analog Relay System multimeter or automobile four-wheel positioning box, to perform data acquisition, and accept to gather the data returned, it is analyzed, by the result of analysis with plotting mode, show in interface display region; Host computer exports to perform setting data to Sensor Analog Relay System multimeter by sending control command, is shown by the data waveform of output in interface display region simultaneously.During above-mentioned upper and lower computer communication, carry out data interaction according to designated communication word and communication format, its rules of interaction is: host computer sends data, and slave computer must feed back it, otherwise be considered as Communications failure (signal wiring mistake), out of Memory obtains from feedback information.This upper and lower computer composition host-guest architecture, slave computer just performs acquisition tasks after receiving the control command that host computer sends.
Step 7, host computer, in conjunction with this information of vehicles, are run by function process and analyze the diagnostic result drawing this function of automobile.Host computer combines the information of vehicles obtained from slave computer, utilizes the vehicle diagnosis functional application analysis of operation and draws corresponding diagnostic result.Owing to being connected with host computer by parallel mode between several slave computers, each vehicle diagnosis functional application is all run in same system, therefore each function process can adopt the mode such as message or shared drive to carry out information interaction, make can, with reference to the related data of once some other function, to be convenient to make vehicle failure judge more quickly and accurately when operating certain function.
In sum, automotive diagnostic system based on universal bus parallelism provided by the invention and method, it is by adopting the structural design of upper and lower computer, and realize parallel join by usb data bus between host computer and several slave computers, slave computer is connected by diagnostics lines with the diagnose interface on automobile; Host computer provides user interface, mutual and the information display function of completing user, and according to the selection of user and slave computer communication, control slave computer and complete automobile failure diagnosis task, slave computer has been responsible for the data communication task with vehicle diagnosis interface reality, not only can solve the deficiency of all-in-one car failure diagnosis apparatus, for auto repair technician provides polygamy to put selection, meet its diversified demand, the occasion that in automobile failure diagnosis Premium Features, data volume is large, high to rate request can also be met.
The above; be only preferred embodiment of the present invention; for the person of ordinary skill of the art, other various corresponding change and distortion can be made according to the technical scheme of this aspect and technical conceive, and all these change and be out of shape the protection domain that all should belong to the claims in the present invention.

Claims (7)

1. the automotive diagnostic system based on universal bus parallelism, it is characterized in that, comprise host computer, and by several slave computers of data bus and this host computer parallel join, the application software of system software and multiple difference in functionality is provided with in this host computer, host computer is provided with communication interface, several slave computers are all electrically connected by data bus and communication interface, this slave computer is several functional control modules with difference in functionality, different functional control modules in host computer to the application software that should have difference in functionality, data-interface is equipped with in this each functional control module, the diagnose interface that this functional control module is cut steam on car respectively by respective data-interface and follow-up is connected,
System software in described host computer is Windows/WinCE system software, application software is run based under this Windows/WinCE system environments, and this application software comprises self-defined desktop programs, automobile diagnostic software, automobile oscilloscope software, car engine ignition analysis software, automobile sensor simulation & testing software, multiple meter for automobile software, four-wheel aligner software, repair information storehouse, the Internet access program and printer software;
Also comprise main control module, public module, communication protocol module, Data Analysis Services module and control command/data acquisition module in described host computer, each slave computer feeds back to host computer by be cut steam by the follow-up of the collection information of vehicles of car of communication interface.
2. as claimed in claim 1 based on the automotive diagnostic system of universal bus parallelism, it is characterized in that, in described automobile diagnostic software, comprise Truck type choice program, download program of lower computer, Read fault coded message program, clear malfunction coding program, time data stream information programme, motion test program, Flash ECU program and functional application.
3. as claimed in claim 1 based on the automotive diagnostic system of universal bus parallelism, it is characterized in that, include USB in described Windows/WinCE system software to drive, slave computer drives to utilize between usb data bus and host computer by this USB and carries out exchanges data.
4., as claimed in claim 1 based on the automotive diagnostic system of universal bus parallelism, it is characterized in that, described slave computer is several functional control modules with difference in functionality, and the diagnose interface that this slave computer is cut steam on car by a diagnostics lines and follow-up is connected; This functional control module comprises one or more combinations in automobile functional diagnosis box, engine ignition analysis oscillograph, Sensor Analog Relay System multimeter, automobile four-wheel positioning box and printer.
5. as claimed in claim 4 based on the automotive diagnostic system of universal bus parallelism, it is characterized in that, diagnosis box microprocessing unit is provided with in described automobile functional diagnosis box, the several communication module be electrically connected with this diagnosis box microprocessing unit and diagnosis communication interface, the diagnose interface that automobile functional diagnosis box is cut steam on car by this diagnosis communication interface and follow-up is connected, this several communication module comprises USB/ bluetooth communication module, CAN communication module, K_Line communication module, and PWM/VPW communication module, this several communication module is all electrically connected with diagnosis box microprocessing unit, also be connected to a logic between K_Line communication module and diagnosis box microprocessing unit and select module, and lever selection module, further, also comprise IO in this automobile functional diagnosis box and select module and power module, this IO selects module to be electrically connected with CAN communication module, K_Line communication module, PWM/VPW communication module and diagnosis communication interface respectively, power module selects module and diagnosis communication interface to be electrically connected with USB/ bluetooth communication module, diagnosis box microprocessing unit, CAN communication module, IO respectively, this diagnosis communication interface is OBDII-16 communication interface, and this OBDII-16 communication interface one end is also electrically connected with diagnosis box microprocessing unit.
6. based on a vehicle diagnosis method for universal bus parallelism, it is characterized in that, comprising:
Step 1, the host computer providing to have a Windows/WinCE system software, establish the application software of multiple difference in functionality in this host computer;
Step 2, provide several slave computers, this slave computer is several functional control modules with difference in functionality, different functional control modules in host computer to the application software that should have difference in functionality;
Step 3, as required, by the slave computer of difference in functionality respectively by usb data bus and host computer parallel join, and the diagnose interface that this slave computer is cut steam on car by diagnostics lines and follow-up to be connected;
Step 4, the system software run in host computer, have multinomial different function process in this system software operational process;
Step 5, user select the function process corresponding with slave computer function to operate from above-mentioned multiple function process;
Step 6, start selected by function process, host computer performs data acquisition by sending control command to slave computer, and cut steam by the follow-up gathered by the diagnose interface information of vehicles of car of slave computer returns to host computer;
Step 7, host computer, in conjunction with this information of vehicles, are run by function process and analyze the diagnostic result drawing this function of automobile;
Include USB in described Windows/WinCE system software to drive, slave computer drives to utilize between usb data bus and host computer by this USB and carries out exchanges data; The application software that function processes different in system software operational process is corresponding different, the data in different function processes can be shared mutually; This application software comprises self-defined desktop programs, automobile diagnostic software, automobile oscilloscope software, car engine ignition analysis software, automobile sensor simulation & testing software, multiple meter for automobile software, four-wheel aligner software, repair information storehouse, the Internet access program and printer software; Truck type choice program, download program of lower computer, Read fault coded message program, clear malfunction coding program, time data stream information programme, motion test program, Flash ECU program and functional application is comprised again in this automobile diagnostic software.
7., as claimed in claim 6 based on the vehicle diagnosis method of universal bus parallelism, it is characterized in that, described slave computer is several functional control modules with difference in functionality, and the diagnose interface that this slave computer is cut steam on car by a diagnostics lines and follow-up is connected, this functional control module comprises one or more combinations in automobile functional diagnosis box, engine ignition analysis oscillograph, Sensor Analog Relay System multimeter, automobile four-wheel positioning box and printer, wherein, diagnosis box microprocessing unit is provided with in automobile functional diagnosis box, the several communication module be electrically connected with this diagnosis box microprocessing unit and diagnosis communication interface, the diagnose interface that automobile functional diagnosis box is cut steam on car by this diagnosis communication interface and follow-up is connected, this several communication module comprises USB/ bluetooth communication module, CAN communication module, K_Line communication module, and PWM/VPW communication module, this several communication module is all electrically connected with diagnosis box microprocessing unit, also be connected to a logic between K_Line communication module and diagnosis box microprocessing unit and select module, and lever selection module, further, also comprise IO in this automobile functional diagnosis box and select module and power module, this IO selects module to be electrically connected with CAN communication module, K_Line communication module, PWM/VPW communication module and diagnosis communication interface respectively, power module selects module and diagnosis communication interface to be electrically connected with USB/ bluetooth communication module, diagnosis box microprocessing unit, CAN communication module, IO respectively, this diagnosis communication interface is OBDII-16 communication interface, and this OBDII-16 communication interface one end is also electrically connected with diagnosis box microprocessing unit.
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