CN103728968A - Automatic test system for CAN network and ECU functions - Google Patents
Automatic test system for CAN network and ECU functions Download PDFInfo
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Abstract
The invention discloses an automatic test system for CAN network and ECU functions. The automatic test system comprises a mainframe, a bus analyzer, a bus interferometer, an oscilloscope, a programmable power supply and a function test board. The mainframe manages the test system in an unified mode, controls the test processes of the whole system concentratedly and achieves automatic tests in which the test processes are performed automatically and test reports are output automatically; the bus analyzer receives, transmits and analyzes bus information; the bus interferometer achieves interference operation on a bus; voltage is converted through the programmable power supply; a multi-path digital oscilloscope is adopted as the oscilloscope, the signal collecting end is connected with the bus or the ECU output end, and the oscilloscope collects waveforms through communication with the mainframe and displays the waveforms in the mainframe to capture information; the function test board simulates input signals needed in the test processes and collects the output signals of the tests. The system has the advantages of improving test efficiency and reducing test errors.
Description
Technical field
The present invention relates to auto communication test and car electrics functional test field, particularly, relate to a kind of CAN network and ECU Function Test Automation system.
Background technology
At present, CAN technology possesses the characteristics such as higher real-time, stability, economy, fault-tolerant ability because of it, be widely used in industrial communication field, particularly the communication of automotive interior electron device network.How to guarantee the correct application of CAN technology, promote the benefit of utilizing of CAN technology, become emphasis, the particularly car load factory application at aspects such as exploitation, tests to CAN network technology that vehicle electric field is paid close attention to.To automotive CAN network test, content measurement is contained to be had: Physical layer test, data link layer test, interbedded formation test, application layer test, application form shows as: communication function, Network Management Function, diagnostic function, gateway function etc.Be directed to car load factory, show as the problems such as content measurement is wide, testing apparatus is many, testing procedure is loaded down with trivial details.
Existing CAN network test technology generally adopts the CANoe of Vector company, CANcase/VN1640, CANtress, CANscope, CANdela, VH1100, the supporting testing tools of software and hardware such as VT System, functional test generally adopts HIL(Hardware-in-the-Loop) measuring technology, introduce the product of NIDeng company, these system prices are expensive, and mostly lack the centralized and unified management of these instruments at present, and content measurement relates to being used in conjunction with each testing tool, simultaneously, along with increasing of test event, the increase of test frequency, manually a series of test of control becomes and wastes time and energy, and manual manipulation also may cause unnecessary error.
Summary of the invention
The object of the invention is to, for the problems referred to above, propose a kind of CAN network and ECU Function Test Automation system, with to CAN network and ECU function automatic detection, thereby realize the advantage that improves testing efficiency, reduces test error.
For achieving the above object, the technical solution used in the present invention is:
CAN network and an ECU Function Test Automation system, comprise main frame, Bus analyzer, bus interferometer, oscillograph, programmable power supply and functional test plate;
Described main frame, unified management test macro, the testing process of centralized control whole system, carries out information interaction with testing tool by communication line, testing tool is connected with tested object, realizes the automatic test that test process automatically performs, test report is exported automatically;
Described Bus analyzer, one end access bus, above-mentioned main frame is accessed by communication line in one end, realizes the transmitting-receiving of bus message and analyzing and processing;
Described bus interferometer, realizes the perturbation operation to bus, comprises the electrical Interference to bus physical layer, the interference of data link layer;
Described programmable power supply, realizes the conversion of voltage, and according to the above-mentioned Host Command receiving, tested ECU is carried out to power supply output and control;
Described oscillograph, adopts multi-path digital oscillograph, and signals collecting end connects bus or ECU output terminal, by with the communicating by letter of main frame, realize waveform acquisition, and in main frame display waveform, catch the information of grabbing;
Described functional test plate, required input signal during simulation test gathers the output signal of test simultaneously.
According to a preferred embodiment of the invention, described main frame adopts computing machine.
According to a preferred embodiment of the invention, described bus interferometer, comprise tertiary voltage modular converter, analog quantity interference module, the first Programmable Logic Controller, described tertiary voltage modular converter provides power supply for analog quantity interference module and the first Programmable Logic Controller, the signal output part of described the first Programmable Logic Controller is connected with the signal input part of analog quantity interference module, described analog quantity interference module access CAN bus, by obtaining above-mentioned host command, realize CAN bus short circuit, ground connection, connect the operation of the analog quantity aspects such as power supply, described the first Programmable Logic Controller comprises two-way CAN passage, described two-way CAN passage access analog quantity interference module, the first Programmable Logic Controller is by obtaining above-mentioned host command, and obtain bus data from a CAN passage, the bit timing of realization to bus data, the interference of the digital quantity aspects such as bit data, finally from the data of another passage output after disturbing processing.
According to a preferred embodiment of the invention, described programmable power supply comprises the first voltage transformation module, the second Programmable Logic Controller and the first relay output module, the output terminal of described the first voltage transformation module is connected with the power input of the first relay output module with the second Programmable Logic Controller respectively, the signal output part of described the second Programmable Logic Controller is connected with the signal input part of the first relay output module, described the first voltage transformation module leads to superpotential conversion, 220V alternating current is converted to the second Programmable Logic Controller and the required direct current of the first relay output module, described the first relay output module, 12v or the output of 24v multi-channel dc power supply can be provided, described the second Programmable Logic Controller carries out power supply output according to the above-mentioned Host Command receiving and controls.
According to a preferred embodiment of the invention, the input signal that described functional test template die is intended and the output signal of collection, at least comprise switching value signal and pulse signal.
According to a preferred embodiment of the invention, described functional test plate comprises photoelectric coupling load module, the 3rd Programmable Logic Controller, second voltage modular converter, the second relay output module, pulse output module, the output terminal of described photoelectric coupling load module is connected with the input end of the 3rd Programmable Logic Controller, the output terminal of described the 3rd Programmable Logic Controller is connected with the input end of the second relay output module and pulse output module respectively, and described second voltage modular converter provides required direct supply for all the other modules.
According to a preferred embodiment of the invention, test process automatically performs, and test macro is exported test report automatically.
Technical scheme of the present invention has following beneficial effect:
Technical scheme of the present invention, by the automatic operating system of CAN network test and ECU functional test is provided, by simulating each input quantity, and output quantity is gathered, realize automatic test, while each testing procedure of standard, classificationization content measurement, has avoided under a large amount of tests, the manually-operated loaded down with trivial details and inefficiency of bringing thus, the problems such as appearance of unnecessary error, promote the effect and quality of test, reach the object that improves testing efficiency, reduces test error.
Accompanying drawing explanation
Fig. 1 is test macro general structure schematic diagram;
Fig. 2 is embodiment main machine structure schematic diagram;
Fig. 3 is test macro management software structural representation;
Fig. 4 is test execution process flow diagram;
Fig. 5 is the schematic flow sheet of bus test program;
Fig. 6 is the schematic flow sheet of ECU functional test program;
Fig. 7 is programmable power supply structural representation;
Fig. 8 is bus interferometer structural representation;
Fig. 9 is functional test plate structure schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein, only for description and interpretation the present invention, is not intended to limit the present invention.
Embodiment mono-,
CAN network and an ECU Function Test Automation system, comprise main frame, Bus analyzer, bus interferometer, oscillograph, programmable power supply and functional test plate;
Main frame, unified management test macro, the testing process of centralized control whole system, carries out information interaction with testing tool by communication line, and testing tool is connected with tested object, realizes the automatic test that test process automatically performs, test report is exported automatically;
Bus analyzer, one end access bus, above-mentioned main frame is accessed by communication line in one end, realizes the transmitting-receiving of bus message and analyzing and processing;
Bus interferometer, realizes the perturbation operation to bus, comprises the electrical Interference to bus physical layer, the interference of data link layer;
Programmable power supply, realizes the conversion of voltage, and according to the above-mentioned Host Command receiving, tested ECU is carried out to power supply output and control;
Oscillograph, adopts multi-path digital oscillograph, and signals collecting end connects bus or ECU output terminal, by with the communicating by letter of main frame, realize waveform acquisition, and in main frame display waveform, catch the information of grabbing;
Functional test plate, required input signal during simulation test gathers the output signal of test simultaneously.
Wherein, main frame adopts computing machine.Described bus interferometer, comprise tertiary voltage modular converter, analog quantity interference module, the first Programmable Logic Controller, tertiary voltage modular converter provides power supply for analog quantity interference module and the first Programmable Logic Controller, the output terminal of the first Programmable Logic Controller is connected with the signal input part of analog quantity interference module, described analog quantity interference module access CAN bus, by obtaining above-mentioned host command, realize CAN bus short circuit, ground connection, connect the operation of the analog quantity aspects such as power supply, described the first Programmable Logic Controller comprises two-way CAN passage, described two-way CAN passage access analog quantity interference module, the first Programmable Logic Controller is by obtaining above-mentioned host command, and obtain bus data from a CAN passage, the bit timing of realization to bus data, the interference of the digital quantity aspects such as bit data, finally from the data of another passage output after disturbing processing.Programmable power supply comprises the first voltage transformation module, the second Programmable Logic Controller and the first relay output module, the output terminal of the first voltage transformation module is connected with the power input of the first relay output module with the second Programmable Logic Controller respectively, the output terminal of the second Programmable Logic Controller is connected with the signal input part of the first relay output module, the first voltage transformation module leads to superpotential conversion, 220V alternating current is converted to the second Programmable Logic Controller and the first relay is exported required direct current, the first relay output module, 12v or the output of 24v multi-channel dc power supply can be provided, the second Programmable Logic Controller carries out power supply output according to the above-mentioned Host Command receiving to tested ECU and controls.The input signal that functional test template die is intended and the output signal of collection, at least comprise switching value signal and pulse signal.Functional test plate comprises photoelectric coupling load module, the 3rd Programmable Logic Controller, second voltage modular converter, the second relay output module, pulse output module, the output terminal of photoelectric coupling load module is connected with the input end of the 3rd Programmable Logic Controller, the output terminal of the 3rd Programmable Logic Controller is connected with the signal input part of the second relay output module and pulse output module respectively, and second voltage modular converter provides all the other modules required direct supply; Test process automatically performs, and test report is exported automatically.
Embodiment bis-,
Fig. 1 is the structural drawing of test macro, and system comprises: main frame, Bus analyzer, programmable power supply, oscillograph, functional test plate.Main frame designs based on computing machine, and main frame communicates by communication line and Bus analyzer, programmable power supply, oscillograph and functional test plate, and Bus analyzer, programmable power supply, oscillograph and functional test plate are controlled and from obtaining information wherein.Communication line determines according to selected concrete testing tool, adopts the communication protocol of RS232 in the present embodiment.Bus interferometer is series in bus, and bus picks out from the other end from the access of bus interferometer one end.In Bus analyzer access bus, Bus analyzer is connected with main frame.Programmable power supply provides the required power supply of ECU that need to carry out voltage management at test process, as to automobile ECU, is generally two-way, i.e. KL30, KL15.Test macro in the technical program can be for single ECU test, also can be for a plurality of ECU tests, a plurality of ECU are used to the situation that programmable power supply provides power supply, the quantity of ECU is subject to the impact of the driving force of programmable power supply, a plurality of ECU are not used to the situation that programmable power supply provides power supply, as real vehicle test, engine bench test, ECU quantity depends on the practical situation of measurand, and the ECU connected mode that Fig. 1 provides is 3 ECU test implementation examples that need external power supply.To gateway test, as the ECU2 situation in Fig. 1, need to connect two-way CAN, i.e. Bus-1, Bus-2 monitor the correlation properties of two network segments, for testing the characteristic of gateway simultaneously.To ECU functional test, only for single ECU situation, as the ECU1 in Fig. 1, functional test plate connects the IO interface of ECU1, and the pulse class output of ECU1 connects oscillograph.By functional test plate, the required input signal of Bus analyzer simulation ECU1, by functional test plate, oscillograph, Bus analyzer, gather the output signal of ECU1, wherein functional test plate gathers switching value, and oscillograph is taked pulsed quantity, Bus analyzer data acquisition bus information.In embodiment, to ECU functional test, tested ECU has BCM(Body Control Module), IC(Instrument Cluster) etc.
In main frame, move the control that test macro management software completes whole automatization test system.If Fig. 2 is a host design scheme, CANdela is used for editing diagnostic data base, coordinate CANoe.DiVa can generate test routine, CANoe coordinates Bus analyzer to realize processing such as the emulation of bus message, analysis, transmitting-receivings, and above-mentioned Bus analyzer can adopt CANcase/VN1640.Fig. 3 is the structural representation of test macro management software, test macro management software in this structure is backward compatible Fig. 2.Test macro management software, comprises content measurement management, test execution management, test record playback management.
Content measurement management, is the management such as editor to test routine, classification, and object is to build test routine storehouse.Content measurement is contained the aspects such as communication, network management, diagnosis, gateway, ECU function, and this is embodied in during test-types described in Fig. 3 arranges.In Fig. 3, action type comprises increase, deletion, editor's test routine, and editing operation comprises modification, the test routine of rearranging.
Test execution management comprises the selection of the detecting informations such as test machine type, test-types, test routine, the configuration of detecting information, and the initialization of test environment, test execution, the process such as output test result.Test type shows as all kinds of vehicles etc., and test-types shows as gateway test, network management test, diagnostic test, unit testing, system testing, ECU functional test etc.The configuration of detecting information comprises that cycle tests configuration forms, testing tool configuration forms, and test environment initialization comprises the initialization of software and hardware testing tool, as shown in Figure 4.
Test record playback management, comprises the recorded information setting of test duration selection, type selection, test-types selection, test routine selection etc., completes needing the selection of playback.Test record mainly refers to bus message recording of information, in test process by bus test software with specific file record, by CANoe, record the message detecting.To test duration selection, the test duration refers to the time that a testing engineering starts, and comprises date and concrete time.In test routine, design the function that records this routine zero hour and the finish time, in test, formed test duration record sheet; In test record playback, first derive and want the timetable that records of playback, then derive corresponding test record, the bus test instrument playback or check test record of finally reruning.
Fig. 4 is the process flow diagram of Fig. 3 test execution, relates to each testing tool is connected configuration setting with main frame, as port setting, test routine are carried out front correctness of each testing tool being carried out to initialization, verification test environment configurations etc.Measuring executing process relates to the process of comparing testing acquired results and expected results, most of expected results is in injecting program, part expected results need be observed, gathers, analyze in test process, the part external manifestation of ECU the etc. when portion waveshape obtaining as oscillograph, ECU functional test, needs discriminatory analysis test result artificially whether to pass through.Implementation records test routine start and end time, forms a test record timetable, coordinates the application of test record playback management function.
Fig. 5 is the process flow diagram of bus test program, the content of network test contains the test of Physical layer, data link layer, interbedded formation, application layer, from testing requirement, the testing tool that consideration will be used, be directed to testing tool, call corresponding interface routine, according to testing process design test step.
Fig. 6 is the flow process of ECU functional test program, ECU functional test mainly comprises that the required input signal of simulation ECU is to tested ECU Injection Signal, input signal comprises switching value signal, pulse signal, bus signals, switching value signal, pulse signal are provided by functional test plate, simultaneity factor will gather the output signal of tested ECU, comprise switching value, pulse signal, bus signals, switching value is gathered by functional test plate, pulse signal is gathered by oscillograph, and signal of communication gathers by Bus analyzer.According to ECU functional specification and the signal to ECU input, whether output signal or the external manifestation of analyzing ECU meet expectation, with this, verify the function of ECU.
Fig. 7 is programmable power supply structural representation, programmable power supply comprises the first voltage transformation module, the second Programmable Logic Controller and the first relay output module, the output terminal of the first voltage transformation module is connected with the input end of the first relay output module with the second Programmable Logic Controller respectively, the output terminal of the second Programmable Logic Controller is connected with the input end of the first relay output module, the first voltage transformation module leads to superpotential conversion, 220V alternating current is converted to the second Programmable Logic Controller and the first relay is exported required direct current, the first relay output module, 12v or the output of 24v multi-channel dc power supply can be provided, the second Programmable Logic Controller carries out power supply output according to the above-mentioned Host Command receiving and controls.The first relay output module is mainly realized the power requirement of ECU, comprises the multichannel output to an ECU, or the multichannel output to a plurality of ECU.
Fig. 8 is bus interferometer structural representation, bus interferometer, comprise tertiary voltage modular converter, analog quantity interference module, the first Programmable Logic Controller, tertiary voltage modular converter provides power supply for analog quantity interference module and the first Programmable Logic Controller, the output terminal of the first Programmable Logic Controller is connected with the input end of analog quantity interference module, analog quantity interference module access CAN bus, the first Programmable Logic Controller is by obtaining above-mentioned host command and analog quantity interference module output control information being realized CAN bus short circuit, ground connection, connect the operation of the analog quantity aspects such as power supply, the first Programmable Logic Controller comprises two-way CAN passage, described passage access analog quantity interference module, the first Programmable Logic Controller is by obtaining above-mentioned host command, and obtain bus data from a CAN passage, the bit timing of realization to bus data, the interference of the digital quantity aspects such as bit data, finally from the data of another passage output after disturbing processing.
Fig. 9 is functional test plate structure schematic diagram, comprise photoelectric coupling load module, the 3rd Programmable Logic Controller, second voltage modular converter, the second relay output module, pulse output module, the output terminal of photoelectric coupling load module is connected with the input end of the 3rd Programmable Logic Controller, the output terminal of the 3rd Programmable Logic Controller is connected with the input end of the second relay output module and pulse output module respectively, and second voltage modular converter provides direct supply.Photoelectric coupling load module is to obtain the switching value signal of ECU output, and pulse output module is inputted for tested ECU provides the required pulse signal of test, and the second relay output module is inputted for tested ECU provides the required pulse switch amount of test.The 3rd programmable controller by with the communicating by letter of main frame, each module is realized to purpose and controls.
Finally it should be noted that: the foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although the present invention is had been described in detail with reference to previous embodiment, for a person skilled in the art, its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (7)
1. CAN network and an ECU Function Test Automation system, is characterized in that, comprises main frame, Bus analyzer, bus interferometer, oscillograph, programmable power supply and functional test plate;
Described main frame, unified management test macro, the testing process of centralized control whole system, carries out information interaction with testing tool by communication line, testing tool is connected with tested object, realizes the automatic test that test process automatically performs, test report is exported automatically;
Described Bus analyzer, one end access bus, above-mentioned main frame is accessed by communication line in one end, realizes the transmitting-receiving of bus message and analyzing and processing;
Described bus interferometer, realizes the perturbation operation to bus, comprises the electrical Interference to bus physical layer, the interference of data link layer;
Described programmable power supply, realizes the conversion of voltage, and according to the above-mentioned Host Command receiving, tested ECU is carried out to power supply output and control;
Described oscillograph, adopts multi-path digital oscillograph, and signals collecting end connects bus or ECU output terminal, by with the communicating by letter of main frame, realize waveform acquisition, and in main frame display waveform, catch the information of grabbing;
Described functional test plate, required input signal during simulation test gathers the output signal of test simultaneously.
2. CAN network according to claim 1 and ECU Function Test Automation system, is characterized in that, described main frame adopts computing machine.
3. CAN network according to claim 2 and ECU Function Test Automation system, it is characterized in that, described bus interferometer, comprise tertiary voltage modular converter, analog quantity interference module, the first Programmable Logic Controller, described tertiary voltage modular converter provides power supply for analog quantity interference module and the first Programmable Logic Controller, the output terminal of described the first Programmable Logic Controller is connected with the input end of analog quantity interference module, described analog quantity interference module access CAN bus, by obtaining above-mentioned host command, realize CAN bus short circuit, ground connection, connect the operation of the analog quantity aspects such as power supply, described the first Programmable Logic Controller comprises two-way CAN passage, described two-way CAN passage access analog quantity interference module, the first Programmable Logic Controller is by obtaining above-mentioned host command, and obtain bus data from a CAN passage, the bit timing of realization to bus data, the interference of the digital quantity aspects such as bit data, finally from the data of another passage output after disturbing processing.
4. CAN network according to claim 2 and ECU Function Test Automation system, it is characterized in that, described programmable power supply comprises the first voltage transformation module, the second Programmable Logic Controller and the first relay output module, the output terminal of described the first voltage transformation module is connected with the power input of the first relay output module with the second Programmable Logic Controller respectively, the output terminal of described the second Programmable Logic Controller is connected with the signal input part of the first relay output module, described the first voltage transformation module leads to superpotential conversion, 220V alternating current is converted to the second Programmable Logic Controller and the required direct current of the first relay output module, described the first relay output module, 12v or the output of 24v multi-channel dc power supply can be provided, described the second Programmable Logic Controller carries out power supply output according to the above-mentioned Host Command receiving and controls.
5. CAN network according to claim 2 and ECU Function Test Automation system, is characterized in that, the input signal that described functional test template die is intended and the output signal of collection, at least comprise switching value signal and pulse signal.
6. CAN network according to claim 5 and ECU Function Test Automation system, it is characterized in that, described functional test plate, comprise photoelectric coupling load module, the 3rd Programmable Logic Controller, second voltage modular converter, the second relay output module, pulse output module, the output terminal of described photoelectric coupling load module is connected with the input end of the 3rd Programmable Logic Controller, the output terminal of described the 3rd Programmable Logic Controller is connected with the input end of the second relay output module and pulse output module respectively, and described second voltage modular converter provides direct supply.
7. according to claim 1 to 6 arbitrary described CAN network and ECU Function Test Automation system, it is characterized in that, test process automatically performs, and test macro is exported test report automatically.
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