CN101639698B - Electrical test system and method of automotive body based on CAN bus - Google Patents
Electrical test system and method of automotive body based on CAN bus Download PDFInfo
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Abstract
The invention relates to an electrical test system and a method of an automotive body based on a CAN bus, the method establishes a test platform of the automotive body with one or a plurality of electronic controllers and loads and is provided with a sampling circuit between each electronic controller and the corresponding load, the sampling circuits collect electrical performance data of the loads, then the electrical performance data is transmitted to an upper computer located by a CANoe card through the high-speed CAN bus for carrying out electrical function test, and information of the electronic controllers is transmitted to the upper computer located by the CANoe card through a low-speed CAN bus for carrying out real-time information monitoring. The method is convenient to operation, can complete signal collection and realize the real-time information monitoring of the electronic controllers and has the advantages of improving test efficiency, shortening ECU development time and reducing development cost.
Description
Technical field
The present invention relates to a kind of automotive networking measuring technology, particularly a kind of body of a motor car electrical test system and method based on the CAN bus.
Background technology
(Controller Area Network, CAN) bus is a kind of serial data communications busses that the beginning of the eighties, Germany Bosch company developed for the real time data exchange between numerous control modules and the testing tool in the solution Hyundai Motor to controller local area network.It is quite ripe that the CAN bussing technique has developed, and it have cost performance height, reliability height, real-time is high and the characteristics that are suitable for working under abominable electric circumstance, obtained using widely in automobile industry.Its good operation characteristic, high reliability and unique design are fit to the mutual communication between each electronic control unit of Hyundai Motor (electronic controller) very much, and have satisfied the real-time and the reliability requirement of automobile preferably.
Along with developing rapidly of automotive electronic technology, the quantity of the electronic controller of being installed in the automobile also rolls up.The use of a large amount of electronic controllers has increased the complexity of automotive networking, also caused the quantity of potential error source sharply to increase simultaneously, so the test of automotive networking becomes emphasis and difficult point in the automotive electronics performance history.Can find early and right a wrong by test, reduce cost of development as much as possible, these all stages in the exploitation of automotive electronics all are indispensable.Therefore, in the process of exploitation, require to have a network test system that function ratio is more powerful.Traditional CAN network test realizes it being that the ECU (electronic controller) that will be developed is articulated to and carries out testing authentication on the real vehicle substantially, engineering staff's use test instrument is finished the collection of signal, then data are brought back the laboratory and analyze, and can't monitor the real-time information of electronic controller.The implementation efficiency of this test is lower, cause the construction cycle of ECU longer, and because whole body electrics is various, the wire harness that connects is also very huge, the break-make of each wire harness mean each electric whether can operate as normal, therefore need to each electric detection of carrying out real-time electrical property, with the break-make of check body harness.
Summary of the invention
The present invention is directed to the defective or the deficiency that exist in the prior art, a kind of body of a motor car electric test method based on the CAN bus of easy to operate, perfect in shape and function is provided, can finish signals collecting and realization monitoring to the real-time information of electronic controller, has the raising testing efficiency, shorten ECU development time, reduce the advantage of cost of development, the invention still further relates to the device of this method of use.
Technical scheme of the present invention is as follows:
A kind of body of a motor car electric test method based on the CAN bus, it is characterized in that, foundation has the body of a motor car test platform of one or more electronic controllers and load, between the load of each electronic controller and correspondence, sample circuit is set, described sample circuit is gathered after the electrical performance data of load the host computer that is transferred to CANoe card place by high-speed CAN bus and is carried out the electric function test, and the information of described electronic controller is carried out real-time information by low speed CAN bus transfer to the host computer at CANoe card place and monitored.
Described electric function test comprises that the electrical performance data to the load of gathering shows and real-time storage in real time.
Host computer also carries out off-line analysis to the electrical performance data of the load of gathering.
Instrument is carried out the meter information monitoring by the host computer that high-speed CAN bus is connected to CANoe card place.
Between the low speed CAN bus that high-speed CAN bus that instrument connects and electronic controller connect, communicate, the information of electronic controller is sent to instrument show by automobile gateway.
Host computer carries out emulation to receiving and sending messages of each electronic controller.
A kind of body of a motor car electrical test system based on the CAN bus, it is characterized in that, comprise the body of a motor car test platform, CANoe card and host computer, described body of a motor car test platform comprises each electronic controller, load and one or more information acquisition module, described information acquisition module is connected between the load of electronic controller and correspondence, the output terminal of described information acquisition module connects the passage of CANoe card by high-speed CAN bus, described electronic controller connects the passage of CANoe card by low speed CAN bus, described CANoe card links to each other with host computer, described host computer comprises electric function test cell and CAN Bus simulator unit, described electric function test cell comprises data acquisition unit, data acquisition unit is used for the electrical performance data of the load of real-time display message acquisition module collection, described CAN Bus simulator unit comprises the real-time information monitoring means, and described real-time information monitoring means is used for monitoring in real time the information of electronic controller.
Also comprise instrument, described instrument is connected to the passage of CANoe card by high-speed CAN bus.
Also comprise automobile gateway, described instrument links to each other with automobile gateway by high-speed CAN bus, and described each electronic controller links to each other with automobile gateway by low speed CAN bus.
Described electric function test cell also comprises data analysis unit, and described data analysis unit is used for the electrical performance data of the load of information acquisition module collection is carried out off-line analysis.
Described CAN Bus simulator unit also comprises the node simulation unit, and described node simulation unit is finished the emulation to each electronic controller.
Technique effect of the present invention is as follows:
The present invention is based on the body of a motor car electric test method of CAN bus, the body of a motor car test platform that has one or more electronic controllers and load by foundation, between the load of each electronic controller and correspondence, sample circuit is set, and the electrical performance data of the load of gathering is transferred to host computer by high-speed CAN bus carries out the electric function test, this method is the test of finishing by the CAN bus on the body of a motor car test platform of setting up, owing to be not on real vehicle, to test, so need not ECU is articulated to and carry out testing authentication on the real vehicle, and after finishing signals collecting on the real vehicle, again data are brought back lab analysis, test platform easily can be provided for the exploitation of automobile ECU, the ECU of exploitation is arranged on this test platform and tests, so have the raising testing efficiency, shorten the ECU development time, improve the efficient of ECU exploitation, reduce the advantage of cost of development, can also on the body of a motor car test platform, the information of electronic controller be carried out the real-time information monitoring by low speed CAN bus transfer to host computer simultaneously, so the perfect function of body of a motor car electric test is simultaneously easy to operate.
Meter information is transferred to host computer by high-speed CAN bus can finishes monitoring meter information; Carry out conversion between high-speed CAN and the low speed CAN by automobile gateway, can also finish simultaneously communicating by letter between instrument and the electronic controller, thereby further improve the function of body of a motor car electric test, on the body of a motor car test platform of setting up, finish integrated test.
The present invention is based on the body of a motor car electrical test system of CAN bus, comprise the body of a motor car test platform, this platform comprises each electronic controller, load and one or more information acquisition module, information acquisition module is connected between the load of electronic controller and correspondence, the output terminal of information acquisition module is connected to high-speed CAN bus, and be connected to host computer by the passage of CANoe card, the information of the electrical performance data of the load that the real-time display message acquisition module of host computer is gathered and real-time monitoring electronic controller, this system provides the body of a motor car test platform, communicate by CAN bus and host computer, finish the real-time monitoring of the information of electric function test and electronic controller, easy to operate, improved testing efficiency simultaneously.
Description of drawings
Fig. 1 is the process flow diagram of a kind of body of a motor car electric test method preferred embodiment based on the CAN bus of the present invention;
Fig. 2 is the structural representation of a kind of body of a motor car electrical test system preferred embodiment based on the CAN bus of the present invention;
Fig. 3 is a kind of structural representation based on the information acquisition module in the body of a motor car electrical test system of CAN bus of the present invention;
Fig. 4 is a kind of structured flowchart based on the host computer preferred embodiment in the body of a motor car electrical test system of CAN bus of the present invention;
Fig. 5 is a host computer workflow diagram shown in Figure 4;
Fig. 6 is the data acquisition unit workflow diagram of host computer shown in Figure 4;
Fig. 7 is a host computer data analysis unit workflow diagram shown in Figure 4.
Embodiment
The present invention will be described below in conjunction with accompanying drawing.
Fig. 1 is the process flow diagram of a kind of body of a motor car electric test method preferred embodiment based on the CAN bus of the present invention.At first set up a body of a motor car test platform that has one or more electronic controllers and real load, first branch road: between the load of each electronic controller and correspondence, sample circuit is set, sample circuit is gathered after the electrical performance data of load the host computer that is transferred to CANoe card place by high-speed CAN bus and is carried out the electric function test, by the electrical performance data that host computer shows in real time and real-time storage is gathered, further can also finish off-line analysis again to this electrical performance data of gathering; Second branch road: the host computer that the information of electronic controller is arrived CANoe card place by low speed CAN bus transfer, monitor the information of this electronic controller in real time by host computer, as real-time monitoring lamp dimmer information, left and right sides car door controller information etc., host computer can also be controlled each electronic controller by virtual switch, thereby finish emulation to electronic controller, as passing through virtual headlamp switch, finish emulation to lamp dimmer to the lamp dimmer transmitting control commands; The 3rd branch road: the host computer that meter information is transferred to CANoe card place by high-speed CAN bus, between the low speed CAN bus that high-speed CAN bus that instrument connects and electronic controller connect, communicate by automobile gateway, by host computer real-time monitor table information, the all right control instrument of host computer is finished the emulation to instrument.
The invention still further relates to the device that uses this method, structural representation as shown in Figure 2 based on the body of a motor car electrical test system preferred embodiment of CAN bus.This system comprises body of a motor car test platform 1, CANoe card 2 and host computer, body of a motor car test platform 1 comprises each electronic controller, instrument, load, automobile gateway and one or more information acquisition module, electronic controller among this embodiment is surrounded by lamp dimmer, left-hand door controller and right car door controller, the load of lamp dimmer correspondence is a lamp, the load of left-hand door controller and right car door controller correspondence is the door and window lifting motor, information acquisition module has three, each information acquisition module all is connected between the load of each electronic controller and correspondence by cable, the output terminal of each information acquisition module all connects the channel C ANoe CH2 of CANoe card 2 by high-speed CAN bus, lamp dimmer, the left-hand door controller is connected low speed CAN bus by switch 3 respectively with right car door controller, and finally connects the channel C ANoe CH1 of CANoe card 2; Instrument connects high-speed CAN bus by switch 4, and finally is connected to the channel C ANoe CH2 of CANoe card 2, and the CANoe card is inserted on the host computer.
Fig. 3 is the structural representation of information acquisition module, indicating the information acquisition module shown in 5 is arranged between the real load of electronic controller and correspondence, by resistance is set on main road, and obtain load current by discharge circuit at these resistance two ends, single-chip microcomputer carries out AD with it and is converted to digital quantity, draw by two series connection earth resistances in the terminal of main road, between two resistance in seriess, draw lead and obtain load voltage, single-chip microcomputer carries out AD with it and is converted to digital quantity, is connected to high-speed CAN bus by the DB9 connection terminal again.Information acquisition module is transferred to host computer with real-time voltage, electric current, the voltage degradation electrical performance data of the load on the electric path at its place by high-speed CAN bus after obtaining the signal that electronic controller issues.
Host computer is equipped with upper computer software, for test macro provides software environment, combine by Visual Studio 2005 developing instruments, SQL Server 2000 databases and CANoe software, be integrated in one with electric function test with to the emulation testing of load, user friendly operation, CANoe be analyze being used to of being widely used, the instrument of emulation and test distributed, embedded system, can carry out monitoring of CAN communication network and analysis, have powerful system emulation function simultaneously.CANoe can set up the simulation architecture of system and the database of node, message and signal, by adopting its programming language CAPL can carry out the emulation of each node of electronic controller, can follow the tracks of dynamically and can show statistical information the data on the CAN bus.The structured flowchart of host computer preferred embodiment as shown in Figure 4, indicate the host computer shown in 6 and comprise electric function test cell and CAN Bus simulator unit, wherein, the electric function test cell comprises data acquisition unit and data analysis unit, data acquisition unit is used for the electrical performance data of the load of real-time display message acquisition module collection, specifically comprise the voltage that to load under the different operating situation, the real-time collection of current value, the chart of data recording and real time data shows, finish the memory function of data by background data base (SQL Server 2000), improved the storage capacity of data, as the electrical performance data of state display lamp and the electrical performance data of demonstration door and window lifting motor; Data analysis unit is carried out off-line analysis and processing to the electrical performance data of the load of information acquisition module collection, as the electrical performance data of off-line analysis lamp and the electrical performance data of door and window lifting motor; CAN Bus simulator unit comprises real-time information monitoring means and node simulation unit, and the real-time information monitoring means is used for monitoring in real time the information of electronic controller, as real-time monitoring lamp dimmer information, left and right sides car door controller information and meter information etc.; The node simulation unit is finished the emulation to each electronic controller, information as nodes such as state display lamp optical controller and left and right sides car door controllers, and state display switch information and instrument fault information etc., can also be according to CAN2.0A or 2.0B message protocol virtual headlamp switch to making up, virtual left and right sides door contact interrupter transmitting control commands, thereby finish the emulation of lamp dimmer and left and right sides car door controller and the emulation and the instrument emulation of switch, and according to the J1939 standard agreement to partial simulation of engine message etc., and adopt patterned interface to come the simulates real actual loading, provide display interface more intuitively, easy operating to the user.Upper computer software has been developed the functional simulation to true switch on the basis to the body electrical performance test, and utilizes patterned interface to come the simulates real actual loading.The user can directly operate Artificial switch on the software interface of exploitation, substitutes true switch, and the signal controlling power driver module that is sent replaces the action of electronic controller controls real load by it.
Fig. 5 is a host computer workflow diagram shown in Figure 4, each hardware of at first determining the body of a motor car test connects intact, guarantee that CANoe software correctly is connected on the CAN bus network by the CANoe card, enter program master interface then, model of creation or open the model that has created in main interface, dispose CANoe software again, initialization system, open CANoe then, the user can enter after the load of selection path connects as required that the electric function test cell is tested or CAN Bus simulator unit carries out emulation.Program stops, and after the user pressed X button, program withdrawed from.Fig. 6 is the data acquisition unit workflow diagram of host computer, at first judge the path that the user selects, after determining the path that the user selects, the load of checking the place path connects, if load connects normal, the parameter that the collection of beginning reading of data is provided with, as voltage, the scope of current measurement and sample frequency, then the image data module is connected with bottom hardware by CANoe (DLL), gather the voltage of load, electric currents etc. are electrical performance data in real time, and with real-time the showing of the mode of figure, the data of collection just store background data base (SQL Server 2000) into.Fig. 7 is a host computer data analysis unit workflow diagram, at first judge the path that the user selects, after determining the path that the user selects, program enters data analysis unit master interface, data analysis type according to user's selection, image data from data base call certain hour scope, the data of gathering are carried out quantitatively (showing a certain amount of value) and analyzed or (show dynamically and gather) analysis at random, mode with figure shows then, and calculate value, average and variance etc. form the data analysis interface at last.
Embodiment one: the test to the electric function of left-hand door is as follows:
Enter the electric function test cell at CANoe software, the switch in kind of operation left-hand door on the body of a motor car test platform, switching signal sends to the left-hand door electronic controller, the left-hand door electronic controller is just operated accordingly to the door and window lifting motor, at this moment, information acquisition module is received the signal of left-hand door electronic controller, just the path at place is carried out the collection of the electrical performance data of door and window lifting motor.The data of data acquisition unit to being gathered in the electric test unit of host computer can show in real time with the form of chart, and data in real time is stored in the background data base, and the while data analysis unit is called the image data of database and carried out off-line analysis.
Embodiment two: test and emulation to the electric function of vehicle body lamp are as follows:
Enter CAN Bus simulator unit at CANoe software, the operational simulation headlamp switch, send a signal to lamp dimmer according to self-defining CAN2.0A or 2.0B message protocol, lamp dimmer driving data acquisition module, the electrical performance data of lamp in the path at collection lamp dimmer and lamp place; This moment upper computer selecting lamp place path, voltage, range of current and the frequency acquisition of collection are set, data acquisition unit just can read the data that bottom hardware is gathered, and stores in the database, and shows in real time with the form of chart.The real-time information of lamp dimmer can be monitored in real time by the information monitoring unit, and the node simulation unit is carried out emulation to lamp dimmer.In addition, our upper computer software has carried out analog simulation to the load in kind on the stand, promptly Shi Wu real-time status can show on the interface of CAN Bus simulator unit in real time, the user can directly pass through the host computer operation interface to the monitoring in real time in kind on the test platform like this, need not go to material object and observe in front.
This system provides the body of a motor car test platform for the electric performance test of CAN bus car body, and on the basis of object test, provide simulation operations to replace the object test scheme, function with checking CAN bus electric function and load, and CAN network performance, thereby satisfy the needs of each ECU exploitation in the automobile, realized based on the test of the body electrical of CAN bus with to the emulation of whole automotive networking, has real-time monitoring to the CAN network, the real-time collection and the storage of data, functions such as the online and off-line statistical study of data, this body of a motor car Testing Platform novelty, rationally distributed, help user's operation, upper computer software INTERFACE DESIGN specialty is attractive in appearance, its functional module is integrated in one electric function test and the test of CAN Bus simulator, easy and simple to handle, reasonable in design, extensibility is strong.
Should be pointed out that the above embodiment can make those skilled in the art more fully understand the invention, but do not limit the present invention in any way creation.Therefore; although this instructions has been described in detail the invention with reference to drawings and Examples; but; those skilled in the art are to be understood that; still can make amendment or be equal to replacement the invention; in a word, all do not break away from the technical scheme and the improvement thereof of the spirit and scope of the invention, and it all should be encompassed in the middle of the protection domain of the invention patent.
Claims (11)
1. body of a motor car electric test method based on the CAN bus, it is characterized in that, foundation has the body of a motor car test platform of one or more electronic controllers and load, between the load of each electronic controller and correspondence, sample circuit is set, described sample circuit is gathered after the electrical performance data of load the host computer that is transferred to CANoe card place by high-speed CAN bus and is carried out the electric function test, and the information of described electronic controller is carried out real-time information by low speed CAN bus transfer to the host computer at CANoe card place and monitored.
2. the body of a motor car electric test method based on the CAN bus according to claim 1 is characterized in that, described electric function test comprises that the electrical performance data to the load of gathering shows and real-time storage in real time.
3. the body of a motor car electric test method based on the CAN bus according to claim 2 is characterized in that, host computer also carries out off-line analysis to the electrical performance data of the load of gathering.
4. the body of a motor car electric test method based on the CAN bus according to claim 1 is characterized in that, instrument is carried out the meter information monitoring by the host computer that high-speed CAN bus is connected to CANoe card place.
5. the body of a motor car electric test method based on the CAN bus according to claim 4, it is characterized in that, between the low speed CAN bus that high-speed CAN bus that instrument connects and electronic controller connect, communicate, the information of electronic controller is sent to instrument show by automobile gateway.
6. the body of a motor car electric test method based on the CAN bus according to claim 5 is characterized in that host computer carries out emulation to receiving and sending messages of each electronic controller.
7. body of a motor car electrical test system based on the CAN bus, it is characterized in that, comprise the body of a motor car test platform, CANoe card and host computer, described body of a motor car test platform comprises each electronic controller, load and one or more information acquisition module, described information acquisition module is connected between the load of electronic controller and correspondence, the output terminal of described information acquisition module connects the passage of CANoe card by high-speed CAN bus, described electronic controller connects the passage of CANoe card by low speed CAN bus, described CANoe card links to each other with host computer, described host computer comprises electric function test cell and CAN Bus simulator unit, described electric function test cell comprises data acquisition unit, data acquisition unit is used for the electrical performance data of the load of real-time display message acquisition module collection, described CAN Bus simulator unit comprises the real-time information monitoring means, and described real-time information monitoring means is used for monitoring in real time the information of electronic controller.
8. the body of a motor car electrical test system based on the CAN bus according to claim 7 is characterized in that, also comprises instrument, and described instrument is connected to the passage of CANoe card by high-speed CAN bus.
9. the body of a motor car electrical test system based on the CAN bus according to claim 8, it is characterized in that, also comprise automobile gateway, described instrument links to each other with automobile gateway by high-speed CAN bus, and described each electronic controller links to each other with automobile gateway by low speed CAN bus.
10. the body of a motor car electrical test system based on the CAN bus according to claim 9, it is characterized in that, described electric function test cell also comprises data analysis unit, and described data analysis unit is used for the electrical performance data of the load of information acquisition module collection is carried out off-line analysis.
11. the body of a motor car electrical test system based on the CAN bus according to claim 9 is characterized in that, described CAN Bus simulator unit also comprises the node simulation unit, and described node simulation unit is finished the emulation to each electronic controller.
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| CN101639698A (en) | 2010-02-03 |
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