A kind of Digital Engine analog systems based on SAE J1939 agreementTechnical field
The present invention relates to analogue technique field, a kind of Digital Engine analog systems based on SAE J1939 agreement.
Background technology
Current China automobile has been enter into the period that maintains sustained and rapid growth, and the huge market demand is that the development of auto Parts Industry provides huge development space.Development and the automobile production of auto parts industry and consume closely bound up.The standard run according to the world, automobile industry car load and parts macro ratio be about 1:1.7, and in prediction on such basis, the auto Parts Industry of China still has greatly improved space.And people are more and more higher to automotive needs, most important of which is exactly the safety travelled, and the most therefore and day by day engine condition monitoring corresponding with safety receive much concern with fault diagnosis functions critical component.
Along with the raising of automobile electronic system complexity, increasing electronic control unit ECU is introduced in automobile.Connection, information exchange and sequencing contro problem between each ECU are the most complicated.
What prior art existed technical problem is that:
1. SAE J1939 agreement length is the longest, data volume is huge, having included all information of vehicles, engine information etc., existing Digital Engine analog systems and fault simulation system parameter select to be unfavorable for instrument and sensor production and maintenance, and the maintenance of miscellaneous part and diagnosis.
The hardware cost that the most existing Digital Engine analog systems is used is high, and its corresponding software work amount too increases the time and efforts of exploitation, adds cost.
There is unfriendly, the defect of design impersonality in the most existing Digital Engine analog systems operation interface.
Summary of the invention
It is an object of the invention to provide a kind of Digital Engine analog systems based on SAE J1939 agreement, with the problem solving to propose in above-mentioned background technology.
For achieving the above object, the present invention provides following technical scheme: a kind of Digital Engine analog systems based on SAE J1939 agreement, hardware structure and systems soft ware including Digital Engine analog systems, described systems soft ware includes analog systems interface, two inputs at described analog systems interface connect the outfan of engine condition analog systems and fault simulation system respectively by signal, the input of described engine condition analog systems is connected to parameter real-time Simulation module and sending module by signal, the input of described fault simulation system is connected to fault real-time Simulation module by signal and fault arranges module；
Systems soft ware is provided with analog systems interface, engine condition analog systems and fault simulation system can be respectively enterd by analog systems interface, engine condition analog systems is simulated according to the state of engine parameter, and fault simulation system is simulated according to fault message.
Preferably, described systems soft ware workflow is as follows: program enters S301 and initializes, enter S302 after initialization and revise parameter, select the most according to demand to enter the output of S303 parameter or the output of S304 fault, end program is judged whether subsequently into S305, then enter S306 to terminate if "Yes", then return to S302 if "No" and revise parameter.
Preferably, described fault arranges module and includes quantity and arrange module and kind arranges module, and quantity arranges module and kind arranges module and all connects fault by signal and arrange module.
Preferably, described analog systems interface is touch screen type.
Compared with prior art, the invention has the beneficial effects as follows: the present invention uses 7 cun of touch screen LEVI777A-CAN.Decrease time and the cost of hardware and software exploitation, hardware tailored appearance of the present invention, analog systems interface are touch screen button, simple to operate, the simulated engine system of the present invention achieves most 50 parameters and sends simultaneously, can be real-time data are modified, can send for each message parameter and carry out start-stop, 15 kinds of fault simulations of the fault simulator functional realiey of the present invention, at most can send 3 fault messages simultaneously, the content of every information, the number of stoppages can be arranged in real time.
Accompanying drawing explanation
Fig. 1 is present system software signal schematic diagram；
Fig. 2 is that fault of the present invention arranges module signal schematic diagram；
Fig. 3 is present procedure workflow schematic diagram.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into the scope of protection of the invention.
Refer to Fig. 1-3, the present invention provides a kind of technical scheme: a kind of Digital Engine analog systems based on SAE J1939 agreement, hardware structure and systems soft ware including Digital Engine analog systems, systems soft ware includes that analog systems interface, analog systems interface are touch screen type, and the analog systems interface of the present invention is touch screen type interface, simple to operate, tailored appearance, user-friendly, improve and exchange degree between machine and user.Two inputs at analog systems interface connect the outfan of engine condition analog systems and fault simulation system respectively by signal, the input of engine condition analog systems is connected to parameter real-time Simulation module and sending module by signal, and the input of fault simulation system is connected to fault real-time Simulation module by signal and fault arranges module.
Hardware structure uses 7 cun of touch screen LEVI777A-CAN, systems soft ware is developed based on LeviStudio configuration software, systems soft ware is provided with analog systems interface, engine condition analog systems and fault simulation system can be respectively enterd by analog systems interface, engine condition analog systems is simulated according to the state of engine parameter, fault simulation system is simulated according to fault message, fault arranges module and includes quantity and arrange module and kind arranges module, and quantity arranges module and kind arranges module and all arranges module by signal connection fault.
Systems soft ware workflow is as follows: program enters S301 and initializes, enter S302 after initialization and revise parameter, select the most according to demand to enter the output of S303 parameter or the output of S304 fault, end program is judged whether subsequently into S305, then enter S306 to terminate if "Yes", then return to S302 if "No" and revise parameter.
The present invention based on SAE J1939 agreement, uses existing hardware equipment and supporting have developed Digital Engine analog systems, being used in based on SAEThe instrument of J1939 and the production of sensor and maintenance, and the maintenance of miscellaneous part and diagnosis, it is achieved engine condition simulation and fault simulation.
Software used by the present invention is to develop based on LeviStudio configuration software.As it is shown in figure 1, native system is provided with analog systems interface, engine condition analog systems and fault simulation system can be respectively enterd by analog systems interface.
Systems soft ware workflow is as in figure 2 it is shown, idiographic flow is as follows:
Step S301, initializes；
Step S302, parameter of modifying, select according to demand to enter the output of S303 parameter or the output of S304 fault；
Step S305, it may be judged whether terminate program, then enter S306 if "Yes" and terminate；Then return to S302 if "No" and revise parameter.
Present invention achieves following functions:
1. the operation conditions (50 parameters such as water temperature, oil pressure, oil temperature and engine speed etc.) of simulated engine system.
2. achieve most 50 parameters to send, can be real-time data be modified simultaneously, can send for each message parameter and carry out start-stop.
3. achieve fault simulator function, it is achieved that the simulation of 15 kinds of faults.At most can send 3 fault messages, the content of every information, the number of stoppages can be arranged in real time simultaneously.
4. system interface operates with touch screen button.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, being appreciated that and these embodiments can carry out multiple change without departing from the principles and spirit of the present invention, revise, replace and modification, the scope of the present invention be defined by the appended.