CN101520661B - Method and device for testing microcomputer control system of diesel locomotive - Google Patents
Method and device for testing microcomputer control system of diesel locomotive Download PDFInfo
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- CN101520661B CN101520661B CN2009100427472A CN200910042747A CN101520661B CN 101520661 B CN101520661 B CN 101520661B CN 2009100427472 A CN2009100427472 A CN 2009100427472A CN 200910042747 A CN200910042747 A CN 200910042747A CN 101520661 B CN101520661 B CN 101520661B
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Abstract
The invention discloses a method and a device for testing a microcomputer control system of a diesel locomotive. A CAN bus or a serial bus is used for communication with an host computer to receive a test command from the host computer, and an inter CAN bus is used to receive the test command and transmits the test command to internal signal generation modules which generate a corresponding test signal according to the test command and transmit the test signal to equipment to be tested through an adapter cable; a signal detection module of a testing device detects an output signal of the equipment to be tested and transmits the output signal to a CPU board through the CAN bus, and the CAN bus or serial bus transmits the output signal to the host computer; and the host computer compares a given signal with the detected signal to realize the fully automatic closed loop test of the equipment to be tested. The fully automatic closed-loop test is a fully automatic loop test of the equipmentto be tested which is implemented in a way that: the inside of the testing device adopts a distribution type module based on the CAN bus, the CPU board is connected with a digital quantity input and output board, a frequency board, a constant-current source board and a DA board through the internal CAN bus, and the testing device uses the external CAN bus or serial bus of the CPU board to communicate with the host computer and to realize the automatic circulating test of the equipment to be tested.
Description
Affiliated technical field
The present invention relates to a kind of testing microcomputer control system method and device of locomotive, refer in particular to testing microcomputer control system method and the device of a kind of diesel locomotive based on the microcomputer network control system.
Background technology
Existing testing microcomputer control system of diesel locomotive device has varied in road bureau and manufacturer, be to the proving installation of concrete vehicle (diesel locomotive DF11 and DF8B series etc.) and the single-board testing of equipment under test basically.Original proving installation design concept all is to adopt signal sources such as potentiometer, shift knob, pilot lamp, frequency generator, constant voltage/current isolator to form basically.Through potentiometer, shift knob, the various test signals of manual setting, and all be that open loop control test and indivedual test board have the part micro-computer function.At present mainly there is weak point in like product: (1) system wiring is complicated, cost is high, power consumption is high, volume is big and be not easy to test onboard; (2) adopt traditional given signal of armstrong's patent, output drives the mode of pilot lamp, and method of testing seriously falls behind; (3) adopt traditional given signal of armstrong's patent, the precision of test is not high, and the error of microcomputer testing because of the tester is different, is difficult to satisfy existing high-precision demand; (4) test macro still adopts open loop control, and the debugging test duration is long and very inconvenient; (5) be not easy to keep the fault inquiry of test result and equipment under test.
Along with the updating and improve of equipment under test technology, the precision of test, response speed, operability and vehicle-mounted simulation test etc. require also increasingly high, and original proving installation can not satisfy existing test request.Therefore the necessary improvement upgrading of carrying out whole-machine test method and device.
Summary of the invention
For the testing microcomputer control system device that overcomes existing diesel locomotive can not satisfy the needs of test at present well; The present invention provides a kind of new testing microcomputer control system method and device; This method of testing and device can not only satisfy diesel locomotive microcomputer network control system test and debugging needs automatically, promote the integral level of diesel locomotive product; And external form is very attractive in appearance, volume is little, in light weight, be convenient on locomotive directly test, adopt modular design so that function expands.
The present invention adopts following technical scheme: the present invention is a kind of testing microcomputer control system of diesel locomotive method and device based on the CAN fieldbus.Wherein, Said method is to communicate by letter with host computer through CAN bus or universal serial bus; Receive the test command of host computer; And sending inner each signal generator module to through the test command that inner CAN bus interface is received, inner each module produces corresponding test signal (frequency signal, analog quantity output signals, digital quantity output signal etc.) and sends equipment under test to through Adapter Cable according to test command; The signal detection module of proving installation detects equipment under test output signal, sends CPU board to through the CAN bus, sends to host computer through CAN or universal serial bus then; Host computer is relatively realized the full-automatic closed loop test to equipment under test with given signal and detection signal.Described full-automatic closed loop test is the inner distributed module that adopts based on the CAN bus of proving installation, is connected through inner CAN bus between CPU board and digital quantity input/output board, frequency plate, constant current source plate and DA plate; Proving installation is communicated by letter with host computer through the outside CAN bus or the universal serial bus (RS232, RS422, RS485 etc.) of CPU board, realizes the full-automatic loop test to tested device fully.
Described CPU board adopts the AVR microprocessor, is the core of this control system, can realization and the recording storage function of telecommunication management, field programmable logic control, serial line interface, software download function and the fault data of host computer and device inside.CPU board is realized the PERCOM peripheral communication management through CAN or universal serial bus (RS232, RS422, RS485 etc.); The reception host computer instructs gives host computer to inner each module and with each internal module information uploading, and CPU board is through swap datas such as inner CAN bus and DIO plate, frequency plate, constant current source plate and DA plates.
Said digital quantity input/output board (DIO plate), frequency plate, constant current source plate and DA plate are except communicating through CAN bus and CPU board; Main purpose provides the required various signal sources of equipment under test and detects the output signal of equipment under test in real time and be uploaded to host computer through CPU board, and is convenient to the function expansion.The DIO plate mainly provides switching value input and relay output signal, and every block of plate provides input of 24 way switch amounts and No. 24 relays output signal simultaneously; The frequency plate produces the square-wave signal of 16 road 0-5V through FPGA, again through amplifier, the square-wave signal of generation-15-+15V relatively; The constant current source plate mainly is responsible for the conversion of voltage signal and current signal, and each road provides the current signal of 0-400m; The DA plate is mainly realized the conversion of 36 way moulds, and the current signal of 8 road 4-20mA is provided through the mode of wire jumper simultaneously.
Proving installation is made up of module such as power panel, CPU board, digital quantity input/output board, frequency quantity output board, analog quantity output board, stream potential source plate and cabinet.Its structure adopts 7U mixing cabinet, and the left side is 4 rectangular connectors, and the upper right corner is the Switching Power Supply plate of power switch and 3U; The lower right corner is six potentiometers; The centre is the 6U plug-in unit of standard.7U mixing cabinet can produce or provide various signals and signal sources such as electric current, voltage, frequency, switching value input, switching value output; And comprise power panel, CPU board, digital quantity input/output board (DIO plate), frequency plate, constant current source plate and analog quantity input/output board plug-in units such as (AIO plates); Also be reserved with the hollow plate position simultaneously, be convenient to function and expand; There is the fan of 2 12V at the cabinet back side, is convenient to the heat radiation of plug-in unit device in the cabinet, ventilates; And Ge Liu 0.5U uses as ventilation about the cabinet.
The present invention can reach following effect
1. can make things convenient for the user on diesel locomotive, to debug just with the formula test.The locomotive depot of road bureau that has, system shop propose: the microcomputer cabinet is not got off when doing " supplementally taking for a short time ", " in repair " or " separately the microcomputer cabinet is done to face and repair ", and directly whether test macro is normal on locomotive.Because little, the lightweight characteristics of this device volume, computer adopt (being with 2 serial ports) notebook computer just directly can test, greatly facilitate the user and debug onboard.
2. highly versatile can be debugged the Control System of Microcomputer of nearly all principal mode diesel locomotive, and to Dalian in one's power the Control System of Microcomputer of the diesel locomotive produced of my company can realize full-automatic testing.
3. because original testing apparatus is compared, adopt digital automatic test, the precision of test, response speed, operability and vehicle-mounted simulation test improve a lot.
4. be convenient to the function expansion.Because employing modular design, the inner CAN of employing bus realize CPU board and communicate by letter with each daughter board, when the system under test (SUT) function need expand, can increase corresponding insert and reach requirement.
Description of drawings
The whole test system block diagram that Fig. 1 proving installation of the present invention and host computer, equipment under test etc. are formed;
Fig. 2 testing microcomputer control system of diesel locomotive principle of device of the present invention block diagram;
Fig. 3 testing microcomputer control system of diesel locomotive device of the present invention shape assumption diagram.
Among the figure: (1), 110V direct supply; (2), proving installation of the present invention; (3), equipment under test; (4), host computer; (5), power panel; (6), CPU board; (7), digital quantity input/output board or DIO plate; (8), frequency plate; (9), constant current source plate; (10), digital-to-analog conversion plate or DA plate; (11) inner CAN bus; (12), power switch; (13), 62 core sockets; (14), potentiometer.
Embodiment
To combine accompanying drawing that the present invention is done further description below.
Accompanying drawing 1 is the whole test system block diagram that proving installation and host computer, equipment under test etc. are formed; Can find out through accompanying drawing 1; The present invention is an a kind of testing microcomputer control system of diesel locomotive system, and total system is to be made up of 110V power supply 1, proving installation 2, equipment under test 3 and host computer more than 4 parts.Wherein, 110V power supply 1 provides working power for proving installation 2 and equipment under test 3; Host computer 4 given command informations are given this proving installation 2 through CAN or universal serial bus (RS232, RS422, RS485 etc.); This proving installation 2 provides various signal sources (like switching value input, switching value output, aanalogvoltage, electric current etc.) to give equipment under test 3 through Adapter Cable; Equipment under test 3 receives corresponding signal, sends data message through CAN or universal serial bus (RS232, RS422, RS485 etc.), at host computer 4 relatively and show; Total system forms the test macro of closed loop.
Accompanying drawing 2 is a diesel locomotive control system method of testing theory diagram; Can find out that through accompanying drawing proving installation 2 receives the instruction of host computer 4 through CAN bus or universal serial bus; And sending inner each module to through inner CAN bus 11, each module produces corresponding test signal (frequency signal, analog quantity output signals, digital quantity output signal etc.) and sends equipment under test 3 to through Adapter Cable according to test command in the device; Each module detects the output signal of equipment under test in real time in the device, after inner CAN bus 11 sends CPU board 6 to, sends to host computer 4; Host computer 4 is relatively realized the full-automatic closed loop test to equipment under test with given signal and detection signal.Proving installation 2 is made up of module such as power panel 5, CPU board 6, digital quantity input/output board 7, frequency quantity output board 8, analog quantity output board 10, stream potential source plate 9 and cabinet.Power panel 5 provides working power for proving installation of the present invention, and the inner distributed module that adopts based on the CAN bus, is connected through inner CAN bus between CPU board and each module (digital quantity input/output board, frequency plate and DA plate).Proving installation 2 is through CAN or universal serial bus external bus and host computer 4 communication exchange data such as (RS232, RS422, RS485 etc.); Inner each module of device adopts the distributed module based on the CAN bus; Be connected through inner CAN bus 11 between CPU board and each distributed module (DIO plate, frequency plate and DA plate), can realize full-automatic closed loop test equipment under test 3.
Fig. 3 is a testing microcomputer control system of diesel locomotive apparatus structure block diagram, from accompanying drawing, can find out, proving installation 2 structures adopt 7U mixing cabinet, and the left side is 4 external AMP 62 core sockets 13, and the upper right corner is the Switching Power Supply plate 5 of power switch 12 and 3U; The lower right corner is six potentiometers 14; The centre is the 6U plug-in unit of standard, CPU board 6, digital quantity input/output board (DIO plate) 7, frequency plate 8, constant current source plate 9 and DA plate 10 is specifically arranged, and on every plug-in card pilot lamp or instrument connection are arranged; Also have two blocks of empty face blind plates simultaneously, be convenient to function and expand; There is the fan of 2 12V at the cabinet back side, is convenient to the heat radiation of plug-in unit device in the cabinet, ventilates; And cabinet Ge Liu 0.5U is up and down used as ventilation.Fig. 3 is the theory diagram of proving installation 2 of the present invention, and power panel 5 provides power supply for this proving installation 2; CPU board 6 daughter board of communicating by letter with the CAN of digital quantity input/output board (DIO plate) 7, frequency plate 8 and DA plate 10 is through the inside CAN bus communication swap data of CPU board 6; The DA plate 10 main current signals of realizing digital-to-analog conversion and 4-20mA are given constant current source plate 9 simulating signal more simultaneously and are realized the baric flow conversion, provide the current signal of 0-400mA; The outer net of CPU board 6 is realized communicating by letter with host computer 4 through the CAN/RS422/RS485/RS232 bus.Described CPU board adopts the AVR microprocessor, is the core of this control system, can realization and the recording storage function of telecommunication management, field programmable logic control, serial line interface, software download function and the fault data of host computer and device inside.CPU board is realized the PERCOM peripheral communication management through CAN or universal serial bus (RS232, RS422, RS485 etc.); The reception host computer instructs gives host computer to inner each module and with each internal module information uploading, and CPU board is through swap datas such as inner CAN bus and DIO plate, frequency plate, constant current source plate and DA plates.
Said digital quantity input/output board (DIO plate), frequency plate, constant current source plate and DA plate are except communicating through CAN bus and CPU board; Main purpose provides the required various signal sources of equipment under test and detects the output signal of equipment under test in real time and be uploaded to host computer through CPU board, and is convenient to the function expansion.The DIO plate mainly provides switching value input and relay output signal, and every block of plate provides input of 24 way switch amounts and No. 24 relays output signal simultaneously; The frequency plate produces the square-wave signal of 16 road 0-5V through FPGA, again through amplifier, the square-wave signal of generation-15-+15V relatively; The constant current source plate mainly is responsible for the conversion of voltage signal and current signal, and each road provides the current signal of 0-400m; The DA plate is mainly realized the conversion of 36 way moulds, and the current signal of 8 road 4-20mA is provided through the mode of wire jumper simultaneously.
The plug-in unit hardware description:
Power panel 5: input range 40～138 VDC, adopt switch power technology, carry out the DC//DC conversion, proving installation 2 of the present invention and fan power supply are provided.Be output as+5V ± 0.2V+12V ± 0.3V.
CPU board 6:CPU plate physically is separated into upper and lower two and half districts; They are complete electrical isolation, and separately independently, but the two halves district is duplicate; Their redundant each other cold standbies, the switching of carrying out between the duty through the power switch on the cabinet panel 12.Microprocessor is to adopt the AVR microprocessor, can realize the recording storage function of field programmable logic control, serial line interface, software download function and fault data.CPU board fault diagnosis: have ten lamps to be used for indicating its duty on the CPU board panel, generally speaking, can judge the duty of CPU board through these ten lamps.
DIO plate 7: adopt the SMT surface to paste technology, every block of digital quantity IO plate can be realized 24 tunnel inputs and the output of No. 24 relays.All should there be light emitting diode on panel, to show to input/output signal, and general CAN communication daughter board is arranged on the plug-in unit, be responsible for communicating by letter with CPU board 6.
Frequency plate 8: adopt general CAN communication daughter board, with FPGA or CPLD generation+5V square-wave signal, pass through the LM139 comparer again, produce " zero passage " square-wave signal of 16 tunnel ± 15V, simultaneously general CAN communication daughter board is communicated by letter with CPU board 6; And corresponding instrument connection is arranged on panel, make things convenient for the test of signal.
Constant current source plate 9: mainly realize baric flow conversion, the voltage signal of the 0-10V that provides from DA plate 10 is through the current signal of baric flow conversion output 0-400mA; And the input and output of signal have corresponding instrument connection on panel, make things convenient for the test of signal.
DA plate 10: mainly produce the digital-to-analog conversion of 36 road 0-10V and the current signal of 8 tunnel 4-20mA.Adopt 12 DAC7724 analog-digital chip and special-purpose 4-20mA chip for driving, guarantee the precision of proving installation 2 of the present invention; Simultaneously general CAN communication daughter board is communicated by letter with CPU board 6; And corresponding instrument connection is arranged on panel, make things convenient for the test of signal.
In addition; Can expand other functional modules as required; As increase the frequency quantity sampling plug-in waveform signal that Control System of Microcomputer produces is detected; Increase AD conversion plug-in unit Control System of Microcomputer power supply, DA output and various analog quantity are detected, coherent detection information is sent to host computer through inner CAN.
Claims (3)
1. testing microcomputer control system of diesel locomotive method; It is characterized in that: said method is to communicate by letter with host computer through CAN bus or universal serial bus; Receive the test command of host computer; And sending inner each signal generator module to through the test command that inner CAN bus interface is received, inner each module of device produces corresponding test signal and sends equipment under test to through Adapter Cable according to test command; Signal detection module detects equipment under test output signal, sends CPU board to through the CAN bus, sends to host computer through CAN or universal serial bus then; Host computer is relatively realized the full-automatic closed loop test to equipment under test with given signal and detection signal; Described full-automatic closed loop test is the inner distributed module that adopts based on the CAN bus of proving installation, is connected through inner CAN bus between CPU board and digital quantity input/output board, frequency plate, constant current source plate and analog quantity output board; Proving installation is communicated by letter with host computer through the outside CAN bus or the universal serial bus of CPU board, realizes the full-automatic loop test to tested device fully; Described CPU board adopts the AVR microprocessor, is the core of this control system, can realize the recording storage of telecommunication management, field programmable logic control, serial line interface, software download function and fault data that CPU board and host computer and device are inner; CPU board is through CAN or universal serial bus and PERCOM peripheral communication management; The reception host computer instructs gives host computer to inner each module and with each internal module information uploading, and CPU board is through inner CAN bus and digital quantity input/output board, frequency plate, constant current source plate and analog quantity output board swap data; Described digital quantity input/output board, frequency plate, constant current source plate and analog quantity output board also provide the output signal of required various signal sources of equipment under test and real-time detection equipment under test and are uploaded to host computer through CPU board except communicating through CAN bus and CPU board; The digital quantity input/output board mainly provides switching value input and relay output signal, and the piece plate provides input of 24 way switch amounts and No. 24 relays output signal simultaneously; The frequency plate produces the square-wave signal of 16 road 0-5V through FPGA, again through amplifier, the square-wave signal of generation-15-+15V relatively; The constant current source plate mainly is responsible for the conversion of voltage signal and current signal, and each road provides the current signal of 0-400mA; The analog quantity output board is mainly realized the conversion of 36 way moulds, and the current signal of 8 road 4-20mA is provided through the mode of wire jumper simultaneously.
2. a testing microcomputer control system of diesel locomotive device is made up of power panel, CPU board, digital quantity input/output board, frequency quantity output board, analog quantity output board, stream potential source plate module and cabinet; Power panel is that proving installation provides working power, it is characterized in that: be connected through inner CAN bus between the inner distributed module that adopts based on the CAN bus, CPU board and digital quantity input/output board, frequency plate and analog quantity output board; Proving installation is through CAN or universal serial bus and host computer communication exchange data; Inner each module of device adopts the distributed module based on the CAN bus; Be connected through inner CAN bus between CPU board and digital quantity input/output board, frequency plate and analog quantity output board, and to the full-automatic closed loop test of equipment under test; The proving installation structure adopts mixes cabinet; The left side is 4 external 62 core sockets; The upper right corner is power switch and Switching Power Supply plate, and the lower right corner is six potentiometers, and the centre is the plug-in unit of standard; CPU board, digital quantity input/output board, frequency plate, constant current source plate and analog quantity output board and preformed plate position are arranged in the plug-in unit, and on every plug-in card pilot lamp or instrument connection are arranged; CPU board is the AVR microprocessor; CPU board physically is separated into upper and lower two and half districts, and they are complete electrical isolation, and separately independently, but the two halves district is duplicate, and their redundant each other cold standbies carry out the switching between the duty through the power switch on the cabinet panel; CPU board is through CAN or universal serial bus and PERCOM peripheral communication management; The reception host computer instructs gives host computer to inner each module and with each internal module information uploading, and CPU board is through inner CAN bus and digital quantity input/output board, frequency plate, constant current source plate and analog quantity output board swap data; Host CPU plate program is responsible for and host computer carry out serial communication and and each communication daughter board between carry out the CAN communication, according to the data that host computer is brought, distribute data, the scheduler task of each daughter board; Digital quantity input/output board, frequency plate, constant current source plate and analog quantity output board and provide the required various signal sources of equipment under test simultaneously and detect in real time the output signal of equipment under test and be uploaded to host computer through CPU board except communicating through CAN bus and CPU board; The digital quantity input/output board provides switching value input and relay output signal, and every block of plate provides input of 24 way switch amounts and No. 24 relays output signal simultaneously; The frequency plate produces the square-wave signal of 16 road 0-5V through FPGA, again through amplifier, the square-wave signal of generation-15-+15V relatively; The constant current source plate mainly is responsible for the conversion of voltage signal and current signal, and each road provides the current signal of 0-400mA; The analog quantity output board is mainly realized the conversion of 36 way moulds, and the current signal of 8 road 4-20mA is provided through the mode of wire jumper simultaneously.
3. testing microcomputer control system of diesel locomotive device according to claim 2; It is characterized in that: digital quantity input/output board, frequency plate and analog quantity output board are made up of the form of CAN communication daughter board and motherboard; Wherein CAN communication daughter board is general daughter board; Be responsible for communicating by letter with CPU, can realize difference in functionality through CPU and FPGA program on the change daughter board, digital quantity input and output, frequency and analog quantity output output drive order through being distributed to the plug-in card of correspondence after the CPU board protocol conversion.
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| CN2009100427472A CN101520661B (en) | 2009-02-27 | 2009-02-27 | Method and device for testing microcomputer control system of diesel locomotive |
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| CN2009100427472A CN101520661B (en) | 2009-02-27 | 2009-02-27 | Method and device for testing microcomputer control system of diesel locomotive |
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| CN102238046A (en) * | 2010-05-06 | 2011-11-09 | 上海固泰科技有限公司 | CAN (Controller Area Network) bus physical layer testing method |
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| CN102736614A (en) * | 2011-04-11 | 2012-10-17 | 株洲田龙铁道电气有限公司 | Test system for diesel locomotive microcomputer cabinet |
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| CN110166075A (en) * | 2019-06-25 | 2019-08-23 | 中国科学院新疆理化技术研究所 | A method of the RS232 communications under nuclear radiation environment |
| CN111175601A (en) * | 2020-01-03 | 2020-05-19 | 云南电网有限责任公司电力科学研究院 | Modular functional test system |
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