CN204215234U - CAN test macro - Google Patents
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- CN204215234U CN204215234U CN201420543575.3U CN201420543575U CN204215234U CN 204215234 U CN204215234 U CN 204215234U CN 201420543575 U CN201420543575 U CN 201420543575U CN 204215234 U CN204215234 U CN 204215234U
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- 238000012360 testing method Methods 0.000 title claims abstract description 73
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- Y—GENERAL 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
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- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
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Abstract
The utility model relates to a kind of CAN test macro, and CAN test macro comprises the first host computer, the second host computer, CAN node, veneer bus node, 1553B bus node, IEEE-488 bus node and supply module; Second host computer, as communication center, adopts low speed CAN to be connected with between four CAN nodes, two the first veneer bus nodes, adopts high-speed CAN bus to be connected, adopt RS-422 bus to be connected with two the second veneer bus nodes with host computer 1; First host computer, as snoopy test center, to be connected by CAN data that reception second host computer sends and to realize monitoring to whole system communication, parsing, preservation with the second host computer; Second host computer adopts the software transmitting and receiving data based on VXWORKS platform, carries out communication with the node in CAN, 1553B bus node, IEEE-488 bus node and RS-422 bus.Normality, the reliability of the communication of this test macro checking whole system, for the ensuing development task of weapon model does technical support.
Description
Technical field
The utility model relates to bus test equipment technical field, particularly relates to a kind of CAN test macro.
Background technology
CAN has now been widely used in industrial field control field due to the performance of its brilliance and high reliability, such as, and automatic industrial manufacturing line, automobile, sensor, Medical Devices, Intelligent Building, elevator controlling distributed real-time system.At present, the most Based PC PCI interface of CAN testing apparatus, it is between tested CAN equipment and the PXI/CPCI detection system of PC, and is only correct detection service data is given to tested CAN equipment to carry out operation detection, and function is simple; And the communication of weapon field can not be adapted to, therefore, how to develop feasibility high and adapt to weapon bus communication system problems demand solve.
Utility model content
For solving above technical matters, the utility model object is to provide a kind of CAN test macro, and this system is that the needs adapting to certain weapon development current are developed, and is mainly used in the feasibility that this model weapon of demonstration and verification adopts CAN communication.Test macro contains multiple CAN node and veneer bus node, and the compatibility multiple bus communication modes such as 1553B, IEEE-488, RS232/422/485, with real time operating system VxWorks for operation platform, Tornado2.0 is adopted to develop bus communication test procedure, thus normality, the reliability of the communication of checking whole system, for the ensuing development task of weapon model does technical support.
For achieving the above object, the utility model provides following technical scheme:
A kind of CAN test macro, comprises the first host computer, the second host computer, four CAN nodes, four veneer bus nodes and power-supply units;
First host computer is the snoopy test center of whole system, is connected with the second host computer, realizes the monitoring of whole system communication, parsing and preservation for accepting its data sent;
Second host computer is the communication center of system, is connected with CAN node and veneer bus node, and is connected with the first host computer;
CAN node is for completing and the communication of total built-in unit and fault simulating function;
Veneer bus node comprises two the first veneer bus nodes and the second veneer bus node; First veneer bus node and the second veneer bus node are used for analog input/output, digital quantity I/O, and analog quantity and digital information and oneself state can be sent to the second host computer, the second host computer is for sending control command to the first veneer bus node and the second veneer bus node and regulating the output of analog quantity and digital quantity;
Power-supply unit is several independently-powered unit, is connected respectively powers with each host computer and each bus node, and is independently controlled by independent switch.
Further, test macro also comprises 1553B bus communication equipment and IEEE-488 bus communication apparatus, 1553B bus communication equipment is connected with the second host computer respectively with IEEE-488 bus communication apparatus, for carrying out 1553B bus communication and IEEE-488 bus communication.
Further, the first host computer comprises pci data capture card and CAN Communication Card, and pci data capture card is measured the analog quantity of veneer bus node and digital output;
Second host computer comprises Two Channels CAN bus communication board and four mouthfuls of RS-422 Communication Cards;
Two Channels CAN bus communication board comprises two CAN interfaces, one of them CAN interface is connected with the CAN of described CAN node and the first veneer bus node, and another CAN interface is connected with the CAN Communication Card of the first host computer;
In four mouthfuls of RS-422 Communication Cards, two RS-422 interfaces are used for being connected with the second veneer bus node, and two other RS-422 interface is spare interface.
Further, veneer bus node comprises single-chip microcomputer, CAN transceiver, RS-422 communications transceiver, A/D converter and D/A converter;
Single-chip microcomputer is connected with described CAN transceiver, RS-422 communications transceiver, A/D converter and D/A converter and realizes Communication processing by external interface respectively.
Further, first host computer inside is provided with four pieces of test boards based on USB line, data/analog-converted the end of described test board is connected with the analog input end of described veneer bus node, the data output end of described test board is connected with described veneer bus node data input end, and data input pin is connected with described veneer bus node data output terminal;
Test board cartoon is crossed USB interface and is connected with outside laptop computer, and laptop computer can send analog quantity and digital quantity signal by test board to veneer bus node.
In order to better carry out human-computer interaction, CAN node is that panel computer is assembled, and its input mode is touch-sensitive display.
The structure of veneer bus node of the present utility model is concrete, and Freescale 16 high-performance MC9S12HZ128VAL single-chip microcomputers selected by single-chip microcomputer; Described RS-422 communications transceiver adopts MAX489ESD chip; Described CAN transceiver adopts TJA1040T chip; Described A/D converter adopts 12 Precision A/D C7844 chips of TI company; Described D/A converter adopts DAC7573IPWR chip.
Further, test macro is located in rack; Rack comprises host computer display screen, CAN node, the keyboard of host computer and mouse, host computer main frame, veneer bus node and power-supply unit from top to bottom successively;
The front end face of veneer bus node is provided with control panel; The bottom of rack is provided with castor.
In order to can better the test job of operating system, control panel left end be provided with test module calibration interface connector, veneer bus node 1 signaling interface connector, veneer bus node 2 signaling interface connector, veneer bus node 3 signaling interface connector, veneer bus node 4 signaling interface connector, USB interface from top to bottom successively with CAN interface;
Each connector is DB37 connector, for respectively the switching signal between the analog/digital of the test board of the first host computer and the switching signal between the analog/digital of data input/output signal and each veneer bus node and data input/output signal passage being come together in each calibration interface; And adopt communication cable connecting test modular calibration interface and each veneer bus node signaling interface to realize test function;
USB interface is the USB interface of test board, monitors for being connected with outer handle computer; CAN interface is two CAN interfaces of Two Channels CAN bus communication board.
Further improve, the centre of control panel is provided with the interface of four veneer bus nodes and the interface of four CAN nodes; The right-hand member of control panel is also provided with power supply pilot lamp and total power switch.
After CAN test macro of the present utility model adopts such scheme, there is following functional advantage:
1. the second host computer adopts the main frame running VxWorks system as CAN, 1553B bus, IEEE-488 bus and RS-422 bus system main control computer, sends, receives bus communication data;
2. the first host computer adopts the main frame running WINDOWS XP system as system listening center, monitors bus data, can realize the measurement of analog quantity and digital quantity passage simultaneously;
3. have four CAN nodes, record, display node communication state, data waveform analysis, have CAN communication failure analog functuion simultaneously;
4. have four CAN RS-422 veneer bus node, carry out the data interaction communication of various baud rate, complete analog quantity and number connect test function;
5. various bus interface double copies, support concurrent working;
6. power-supply device controlling functions, controls the power supply of each node of system, and the normality realized communications protocol after node power-off is run is verified.
Accompanying drawing explanation
Above-mentioned is only the general introduction of technical solutions of the utility model, and in order to better understand technological means of the present utility model, below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail.
Fig. 1 is the one-piece construction schematic diagram of the CAN test macro of embodiment;
Fig. 2 is the annexation figure of the first host computer of embodiment, the second host computer and bus node;
Fig. 3 is the cut-away view of the veneer bus node of embodiment;
Fig. 4 is the cabinet structure schematic diagram of the CAN test macro of embodiment;
Fig. 5 is the control panel schematic diagram of the CAN test macro of embodiment;
Fig. 6 is the bulk supply schematic diagram of the CAN test macro of embodiment;
Fig. 7 is the confession electrical schematic of the veneer node of embodiment.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is described in detail.
Embodiment
Shown in Fig. 1, the CAN test macro of the present embodiment comprises the first host computer 101, second host computer 102, four CAN nodes 103, four veneer bus nodes and power-supply unit 106.
First host computer 101 is the snoopy test center of whole system, is connected and accepts its data sent to realize monitoring to whole system communication, parsing and preservation with the second host computer 102, and is connected with veneer bus node; Second host computer 102 is the communication center of system, is connected with CAN node 103 and veneer bus node.
Second host computer 102 adopts cpci bus structure according to performed task, carries Two Channels CAN bus communication board and four mouthfuls of RS-422 Communication Cards, shown in Fig. 2.Described Two Channels CAN bus communication board comprises two CAN interfaces, and one of them CAN interface is connected with low speed CAN, and described CAN is connected with CAN node 103, first veneer bus node 104 respectively; Another CAN interface is connected with the first host computer 101 by high-speed CAN bus; Two bus interface in four mouthfuls of RS-422 Communication Cards are connected with two the second veneer bus nodes 105, and another two interfaces are spare interface.
Preferred embodiment, CAN test macro also comprises 1553B bus communication equipment and IEEE-488 bus communication apparatus, and described 1553B bus communication equipment and IEEE-488 bus communication apparatus communicate with the second host computer 102 respectively.
Second host computer 102 adopts the software transmitting and receiving data based on VXWORKS platform, carries out communication with the node in CAN, RS-422 bus, 1553B bus and IEEE-488 bus, complete CAN device drives, RS-422 bus apparatus drives, 1553B bus apparatus and IEEE-488 bus device drives, CAN communication is carried out according to CAN communications protocol, RS-422 bus communication is carried out according to RS-422 bus protocol, 1553B bus communication is carried out according to 1553B bus protocol, IEEE-488 bus communication is carried out according to IEEE-488 bus communications protocol, by CAN, 1553B bus, the data of IEEE-488 bus and RS-422 bus are forwarded to the second host computer 102 by CAN, the storage space that VxWorks platform is opened up 100,000,000 grades adopts the mode of first-in first-out to store, outputting communication data.
First host computer 101 is the snoopy test center of system, to be connected and to receive its data sent to realize monitoring to whole system communication, parsing and preservation by high-speed CAN bus with the second host computer 102.Described first host computer 101 adopts industrial computer to carry pci data analog input card and CAN Communication Card according to performed task; Pci data analog input card is measured the analog quantity of veneer bus node and digital output, and is uploaded in the first host computer 102 and carries out showing and record.
Shown in Fig. 3, veneer bus node comprises single-chip microcomputer, CAN transceiver, RS-422 communications transceiver, A/D converter and D/A converter; Single-chip microcomputer is connected with described CAN transceiver, RS-422 communications transceiver, A/D converter and D/A converter respectively, and realizes Communication processing by corresponding treatment circuit connection external interface.
Veneer bus node comprises four nodes according to testing apparatus practical situations, each node has the function of analog input/output, digital quantity I/O, and each node has CAN interface and RS-422 bus interface, communication can be carried out respectively according to the different communications protocol of two covers; The test macro of the present embodiment, is preferably connected in the mode of RS-422 asynchronous communication between the second veneer bus node 105 with the second host computer 102, and the first veneer bus node 103 is connected in the mode of CAN communication with the second host computer 102.The analog quantity of the first veneer bus node 103 and the second veneer bus node 104 and digital information and oneself state can be sent to the second host computer 102 according to the regulation of communications protocol, and the second host computer 102 can send according to communications protocol control command to regulate analog quantity and digital quantity output to veneer bus node.
For realizing the analog quantity of veneer bus node, the test function of digital quantity, first host computer 101 inside is configured with four pieces of test boards based on USB line, data/analog-converted the end of test board is connected with the analog input end of veneer bus node, the data output end of test board is connected with described veneer bus node data input end, and data input pin is connected with described veneer bus node data output terminal.
Test board cartoon is crossed USB interface and is connected with outside laptop computer, and laptop computer can send analog quantity and digital quantity signal by test board to veneer bus node.The mode that the signal received specifies with communications protocol is sent to the second host computer 102 by RS-422 or CAN by veneer bus node.
CAN node 103 adopts the mode of panel computer, built-in CAN communication interface, in order to carry out the input mode that man-machine interaction have employed touch-screen better.CAN node totally 4,4 bus communication equipment on simulation test equipment, complete and the communication of total built-in unit and fault simulating function.
The veneer bus node of the present embodiment take High Performance SCM as core, be provided with the communication that RS-422 communications transceiver and CAN communication transceiver carry out corresponding interface, adopt the A/D conversion chip of 12 precision to complete analog input sampling, adopt 12 precision D/A conversion chips to complete analog output.Owing to adopting A/D conversion chip and the D/A conversion chip of 12, the accuracy requirement of 1% can be met.
Particularly, single-chip microcomputer preferably adopts Freescale 16 high-performance MC9S12HZ128VAL single-chip microcomputers, and this single-chip microcomputer has the A/D converter of 16 tunnel 10 bit resolutions, 2 CAN interfaces, 2 asynchronous serial communication interfaces (SCI), 1 iic bus interface (IIC).
RS-422 communications transceiver adopts MAX489ESD chip, and this chip can realize full-duplex communication, has limit Slew Rate driver, can reduce electromagnetic interference (EMI), and reduces the reflection caused by inappropriate terminal coupling cable.
CAN communication transceiver adopts TJA1040T chip, and this chip has outstanding Electro Magnetic Compatibility, and has desirable passive performance under not power-up state, it also provides low-power consumption to manage, support Remote Wake Up, it at least can connect 110 nodes, and speed can reach 1Mbps.
A/D conversion chip adopts 12 of IT company to be Precision A/D C7844 chip, 8 passages, band serial line interface SPI interface.
D/A conversion chip adopts DAC7573IPWR chip, and DAC7573IPWR chip has iic bus interface, and speed can reach 3.4Mbps, the converter of low-power consumption, and resolution is 12.
Shown in Fig. 4, another embodiment of the present utility model is located in rack 1 by CAN test macro, rack 1 adopts standard 19 inches of racks, and rack 1 layout is from top to bottom followed successively by rack 1 and comprises host computer display screen 2, CAN node 103, the keyboard 3 of host computer and mouse 4, host computer main frame 5, veneer bus node and power-supply unit 106 from top to bottom successively; The front end face of veneer bus node is provided with control panel 6; The bottom of rack 1 is provided with castor so that mobile, cabinet dimensions: 640mm ╳ 700mm ╳ 1600mm (Chang ╳ Kuan ╳ is high).
As shown in Figure 5, control panel 6 left end is provided with test module calibration interface connector 60, veneer bus node 1 signaling interface connector 61, veneer bus node 2 signaling interface connector 62, veneer bus node 3 signaling interface connector 63, veneer bus node 4 signaling interface connector 64, USB interface 65 from top to bottom successively with CAN interface 66.
Each connector is DB37 connector, for respectively the switching signal between the analog/digital of the test board of the first host computer 101 and the switching signal between the analog/digital of data input/output signal and each veneer bus node and data input/output signal passage being come together in each calibration interface; USB interface 65 is the USB interface of test board, monitors for being connected with outer handle computer; CAN interface 66 is two CAN interfaces of Two Channels CAN bus communication board.
The centre of control panel 6 is provided with the interface of four veneer bus nodes and the interface of four CAN nodes 103; The right-hand member of described control panel 6 is also provided with power supply pilot lamp 67 and total power switch 68.
Control panel 6 adopts self-control communication cable one end to connect " test module calibration interface " connector, the other end can connect respectively " the first veneer bus node 1 ", " the first veneer bus node 2 ", " the second veneer bus node 1 " " second veneer bus node 2 " connector, the data input/output function of each veneer bus node is tested by test module, or by test module, analog quantity/digital quantity signal is exported to each veneer bus node, realize test function, each test module connects each test module USB port by four mouthfuls of USB coupling mechanisms of interior of equipment cabinet, and be connected for monitoring with outer handle computer by the USB port on panel.
Power-supply unit 106 is several independently-powered unit, powers respectively with each equipment connection in system, and the power supply of each equipment can switch separately.220V electric main accesses through the connector X1 of rack 1 rear panel, in rack 1, be dispensed to each consumer, shown in Fig. 7 by corresponding air-break and pushbutton switch; Push to air-break Q1, the control panel 6 of system is powered pilot lamp HD1 Chang Liang (yellow), radiator fan work, represents that outer power supply is normal.Press the button switch S 1, interior lamp Chang Liang (green), powers to Switching Power Supply.Push to air-break Q2, power to tetrad wiring board, now can start industrial computer and display thereof.
The direct current supply of veneer bus node and CAN node 103 is from the direct-current switch power supply G1 in Fig. 7, the break-make of power supply is controlled, simultaneously in order to the impact of emulation bus communication apparatus when unexpected power down on system communication state by the total power switch 68 on the control panel 6 of rack 1.
The above embodiment is only that preferred implementation of the present utility model is described; not scope of the present utility model is limited; under the prerequisite not departing from the utility model design spirit; the various distortion that those of ordinary skill in the art make the technical solution of the utility model and improvement, all should fall in protection domain that claims of the present utility model determine.
Claims (10)
1. a CAN test macro, it is characterized in that, comprise the first host computer (101), the second host computer (102), four CAN nodes (103), four veneer bus nodes and power-supply units (106);
The snoopy test center that described first host computer (101) is whole system, is connected with described second host computer (102), realizes the monitoring of whole system communication, parsing and preservation for accepting its data sent;
The communication center that described second host computer (102) is system, is connected with described CAN node (103) and veneer bus node, and is connected with described first host computer (101);
Described CAN node (103) is for completing and the communication of total built-in unit and fault simulating function;
Described veneer bus node comprises two the first veneer bus nodes (104) and the second veneer bus node (105); Described first veneer bus node (104) and the second veneer bus node (105) are for analog input/output, digital quantity I/O, and analog quantity and digital information and oneself state can be sent to described second host computer (102), described second host computer (102) regulates the output of analog quantity and digital quantity for sending control command to described first veneer bus node (104) and the second veneer bus node (105);
Described power-supply unit (106) is several independently-powered unit, is connected respectively powers with each host computer and each bus node, and is independently controlled by independent switch.
2. CAN test macro as claimed in claim 1, it is characterized in that, described test macro also comprises 1553B bus communication equipment and IEEE-488 bus communication apparatus, described 1553B bus communication equipment is connected with the second host computer (102) respectively with IEEE-488 bus communication apparatus, for carrying out 1553B bus communication and IEEE-488 bus communication.
3. CAN test macro as claimed in claim 1, it is characterized in that, described first host computer (101) comprises pci data capture card and CAN Communication Card, and described pci data capture card is used for measuring the analog quantity of veneer bus node and digital output;
Described second host computer (102) comprises Two Channels CAN bus communication board and four mouthfuls of RS-422 Communication Cards;
Described Two Channels CAN bus communication board comprises two CAN interfaces, one of them CAN interface is connected with the CAN of described CAN node and the first veneer bus node (104), and another CAN interface is connected with the CAN Communication Card of described first host computer (101);
In described four mouthfuls of RS-422 Communication Cards, two RS-422 interfaces are used for being connected with the second veneer bus node (105), and two other RS-422 interface is spare interface.
4. CAN test macro as claimed in claim 3, it is characterized in that, described veneer bus node comprises single-chip microcomputer, CAN transceiver, RS-422 communications transceiver, A/D converter and D/A converter;
Described single-chip microcomputer is connected with described CAN transceiver, RS-422 communications transceiver, A/D converter and D/A converter respectively, and realizes Communication processing by corresponding treatment circuit connection external interface.
5. CAN test macro as claimed in claim 4, it is characterized in that, described first host computer (101) inside is provided with four pieces of test boards based on USB line, data/analog-converted the end of described test board is connected with the analog input end of described veneer bus node, the data output end of described test board is connected with described veneer bus node data input end, and data input pin is connected with described veneer bus node data output terminal;
Described test board cartoon is crossed USB interface and is connected with outside laptop computer, and laptop computer can send analog quantity and digital quantity signal by test board to veneer bus node.
6. CAN test macro as claimed in claim 1, it is characterized in that, described CAN node is that panel computer is assembled, and its input mode is touch-sensitive display.
7. CAN test macro as claimed in claim 4, it is characterized in that, Freescale 16 high-performance MC9S 12HZ 128VAL single-chip microcomputers selected by described single-chip microcomputer; Described RS-422 communications transceiver adopts MAX489ESD chip; Described CAN transceiver adopts TJA1040T chip; Described A/D converter adopts 12 Precision A/D C7844 chips of TI company; Described D/A converter adopts DAC7573IPWR chip.
8. CAN test macro as claimed in claim 5, it is characterized in that, described test macro is located in rack (1);
Described rack (1) comprises host computer display screen (2), CAN node (103), the keyboard (3) of host computer and mouse (4), host computer main frame (5), veneer bus node and power-supply unit (106) from top to bottom successively;
The front end face of described veneer bus node is provided with control panel (6);
The bottom of described rack (1) is provided with castor.
9. CAN test macro as claimed in claim 8, it is characterized in that, described control panel (6) left end is provided with test module calibration interface connector (60), veneer bus node 1 signaling interface connector (61), veneer bus node 2 signaling interface connector (62), veneer bus node 3 signaling interface connector (63), veneer bus node 4 signaling interface connector (64), USB interface (65) from top to bottom successively with CAN interface (66);
Described each connector is DB37 connector, for respectively the switching signal between the analog/digital of the test board of the first host computer (101) and the switching signal between the analog/digital of data input/output signal and each veneer bus node and data input/output signal passage being come together in each calibration interface, and communication cable connecting test modular calibration interface and each veneer bus node signaling interface is adopted to realize test function;
Described USB interface (65) is the USB interface of test board, monitors for being connected with outer handle computer; Two CAN interfaces that described CAN interface (66) is Two Channels CAN bus communication board.
10. CAN test macro as claimed in claim 1, it is characterized in that, the centre of described control panel (6) is provided with the interface of four veneer bus nodes and the interface of four CAN nodes (103); The right-hand member of described control panel (6) is also provided with power supply pilot lamp (67) and total power switch (68).
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| CN201420543575.3U CN204215234U (en) | 2014-09-19 | 2014-09-19 | CAN test macro |
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| CN201420543575.3U CN204215234U (en) | 2014-09-19 | 2014-09-19 | CAN test macro |
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| CN108664001A (en) * | 2018-04-18 | 2018-10-16 | 山东农业大学 | Birds product processes source tracing method and system |
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| CN112256512A (en) * | 2020-10-27 | 2021-01-22 | 重庆航天工业有限公司 | General verification and test system based on GLINK bus |
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| CN114374578A (en) * | 2021-12-27 | 2022-04-19 | 汉博来自控科技(上海)有限公司 | Data transmission system compatible with serial port communication and CAN communication for engineering machinery |
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