CN101806869B - General-purpose automatic test system for locomotive switching power supply and method thereof - Google Patents
General-purpose automatic test system for locomotive switching power supply and method thereof Download PDFInfo
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Abstract
The invention relates to a general-purpose automatic test method for a locomotive switching power supply, and general-purpose automatic test system, and comprises a test control system, a programmable power supply unit, a programmable DC load unit and a programmable data acquisition unit, wherein the programmable power supply unit is connected with the test control system through a GPIB bus and provides excitation for the tested switching power supply; the programmable DC load unit is connected with the test control system through the GPIB bus and provides a load for the switching power supply to be tested; and the programmable data acquisition unit is connected with the test control system through the GPIB bus and acquires responses of the tested switching power supply. The output voltage, voltage regulation factor, load regulation factor and the like are tested by logging in virtual instrument software on a personal computer. The invention can well overcome the defects of insufficient compatibility, high complexity and low reliability of the test system in the prior art, and has the advantages of automation, general purpose, convenient operation and reliable performance.
Description
Technical field
The present invention relates to a kind of computer measurement measuring technology, especially a kind of relate to the rolling stock Switching Power Supply based on GPIB(General Purpose Interface Bus, general purpose interface bus, a kind of instrument control bus) bussing technique and virtual instrument (Virtual Instrument, virtual instrument, be that instrument can be controlled by software programming, what see at the software end is exactly virtual instrument) the General Purpose Automatic Test method of technology.
Background technology
Switching Power Supply: Switch Mode Power Supply namely refers to a kind of D.C. regulated power supply of operating with on-off mode as the device of voltage adjustment function.The locomotive switching power supply veneer is the important component part of locomotive control, also is the more and indispensable part of quantity, for miscellaneous equipment and veneer provide reliable and stable working power.Different Switching Power Supply veneer function basically identicals just adopt different input voltages, different version, different output way and output voltages according to different application demands.
Because the locomotive switching power supply veneer is being undertaken the important task that reliable and stable working power is provided for locomotive control, and kind is various, One's name is legion.And existing locomotive switching power supply single board testing system, only can finish the test of one or more Switching Power Supply veneers mostly, all must build new test macro again whenever new product occurring, and the foundation of locomotive switching power supply veneer condition of work and adjustment, test result correctness, rely on operating personnel's manual operation and artificial judgement fully, complexity height, poor reliability.
At present, existing locomotive switching power supply single board testing system, or only can test one or more Switching Power Supply veneers, when new product occurring, must build new test macro again; Or adopted bus integrated, but adopt traditional programming language control such as C language, assembly language, new product or product up-gradation exploitation new procedures difficulty are big, readable poor; Or signal transmission and judge and be subjected to the direct supply single board starting easily or the influence of electromagnetic interference (EMI) when turn-offing, easily judge by accident.
Summary of the invention
The invention provides a kind of locomotive switching power supply General Purpose Automatic Test method, this invention can overcome well that the locomotive switching power supply single board testing system test compatibility that prior art exists is strong, complexity is high, the shortcoming of poor reliability, makes up the locomotive switching power supply veneer general purpose automatic test system of automatic, general a, simple operation, dependable performance.
The invention provides a kind of embodiment of general-purpose automatic test system for locomotive switching power supply, general-purpose automatic test system for locomotive switching power supply comprises test control system, the programmable power supply unit, program control DC load unit and programmable data collecting unit, test control system comprises the industry control PC, the industry control PC comprises the virtual instrument software module, described programmable power supply unit links to each other with test control system by gpib bus, for tested Switching Power Supply provides excitation, described program control DC load unit links to each other with test control system by gpib bus, for described tested Switching Power Supply provides load, described programmable data collecting unit links to each other with test control system by gpib bus described tested Switching Power Supply response is gathered.
As the further embodiment of a kind of general-purpose automatic test system for locomotive switching power supply of the present invention, test control system further comprises the PCI-GPIB card, described industry control PC links to each other with the PCI-GPIB card by pci bus, and the PCI-GPIB cartoon is crossed gpib bus and linked to each other with the programmable data collecting unit with programmable power supply unit, program control DC load unit.
As the further embodiment of a kind of general-purpose automatic test system for locomotive switching power supply of the present invention, the programmable power supply unit further comprises programme-controlled dc power and program control AC power, described programme-controlled dc power requires to provide power supply for the tested Switching Power Supply of DC voltage for input voltage, and described program control AC power requires to provide power supply for the tested Switching Power Supply of alternating voltage for input voltage.
As the further embodiment of a kind of general-purpose automatic test system for locomotive switching power supply of the present invention, program control DC load unit further comprises program-controlled electronic load 1 and program-controlled electronic load 2, described program-controlled electronic load 1 provides the load of multichannel high-voltage large current high power DC, and described program-controlled electronic load 2 provides the little electric current miniwatt of multi-way low voltage DC load.
As the further embodiment of a kind of general-purpose automatic test system for locomotive switching power supply of the present invention, the programmable data collecting unit further comprises programmable oscilloscope and programmable data collection switchgear, described programmable data is gathered switchgear the response of tested Switching Power Supply is gathered, and described programmable oscilloscope shows the data that collect.
The present invention also provides a kind of embodiment of locomotive switching power supply General Purpose Automatic Test method, a kind of locomotive switching power supply General Purpose Automatic Test method, described method of testing comprises the test of locomotive switching power supply output voltage, described locomotive switching power supply output voltage test may further comprise the steps: after connecting the adapter that mates with tested Switching Power Supply, login virtual instrument software at the industry control PC, open and move corresponding control program, control program is at first selected program control AC power or programme-controlled dc power and program control DC load unit, make program control AC power or programme-controlled dc power provide input voltage by the gpib bus transfer control signal, control program control DC load unit and provide the setting load, gather the closed corresponding data acquisition channel of switchgear and read data by programmable data then, and institute's image data sent back industry control PC virtual instrument software by the gpib bus system, virtual instrument software reads the data of sending back to and compares with setting value, automatically whether judgement meets the demands, and generates test report automatically.
As the further embodiment of locomotive switching power supply General Purpose Automatic Test method of the present invention, described method of testing further comprises the voltage regulation factor test, described voltage regulation factor test may further comprise the steps: after connecting the adapter that mates with tested Switching Power Supply, login virtual instrument software at PC, open and move corresponding control program, control program is at first selected program control AC power or programme-controlled dc power and program control DC load unit, make the program-controlled electronic load of program control DC load unit provide the setting load by the gpib bus transfer control signal, at first provide the specified input voltage of tested Switching Power Supply by program control AC power or programme-controlled dc power, gather the closed corresponding data acquisition channel of switchgear by programmable data then and read tested electric power output voltage value and institute's image data is sent back industry control PC virtual instrument software by the gpib bus system, virtual instrument software reads the data of sending back to; Provide input voltage higher limit and the input voltage lower limit of tested Switching Power Supply then respectively by program control AC power or programme-controlled dc power, programmable data is gathered switchgear and is sent the tested switch power source output voltage value under two kinds of conditions respectively back to and send virtual instrument software back to, virtual instrument software read collect for three times output voltage values and with calculate voltage regulation factor automatically, and compare with setting value, automatically whether judgement meets the demands, and generates test report automatically.
As the further embodiment of locomotive switching power supply General Purpose Automatic Test method of the present invention, described method of testing further comprises the load regulation test, described load regulation test may further comprise the steps: after connecting the adapter that mates with tested Switching Power Supply, login virtual instrument software at PC, open and move corresponding control program, control program is at first selected program control AC power or programme-controlled dc power and program control DC load unit, make program control AC power or programme-controlled dc power provide the specified input voltage of tested Switching Power Supply by the gpib bus transfer control signal, and the program-controlled electronic load that control is worth program control DC load unit provides nominal load, gather the closed corresponding data acquisition channel of switchgear by programmable data then and read tested switch power source output voltage value and institute's image data is sent back industry control PC virtual instrument software by the gpib bus system, virtual instrument software reads the data of sending back to; Provide output higher limit and the output load lower limit of tested Switching Power Supply then respectively by the program-controlled electronic load, programmable data is gathered switchgear and is sent the tested switch power source output voltage value under two kinds of conditions respectively back to and send virtual instrument software back to, virtual instrument software read collect for three times output voltage values and with calculate load regulation automatically, and compare with setting value, automatically whether judgement meets the demands, and generates test report automatically.
As the further embodiment of locomotive switching power supply General Purpose Automatic Test method of the present invention, described method of testing further comprises ripple test, described ripple test may further comprise the steps: after connecting the adapter that mates with tested Switching Power Supply, login virtual instrument software at PC, open and move corresponding control program, control program is at first selected program control AC power or programme-controlled dc power and program control DC load unit, programmable oscilloscope, make program control AC power or programme-controlled dc power provide the specified input voltage of tested Switching Power Supply by the gpib bus transfer control signal, and the program-controlled electronic load of controlling program control DC load unit provides nominal load, gather the closed corresponding data acquisition channel of switchgear by programmable data then, the coupling scheme of programmable oscilloscope are set automatically, the bandwidth restriction, automatically read ripple value or waveform and send back industry control PC virtual instrument software by gpib bus, virtual instrument software reads data, and with setting value or set waveform and compare, automatically whether judgement meets the demands, and generates test report automatically.
As the further embodiment of locomotive switching power supply General Purpose Automatic Test method of the present invention, described method of testing further comprises the dynamic load test, described dynamic load test may further comprise the steps: after connecting the adapter that mates with tested Switching Power Supply, login virtual instrument software at PC, open and move corresponding control program, control program is at first selected program control AC power or programme-controlled dc power and program control DC load unit, programmable oscilloscope, make program control AC power or programme-controlled dc power provide the specified input voltage of tested Switching Power Supply by the gpib bus transfer control signal, and the program-controlled electronic load of controlling program control DC load unit the cycle between nominal load and 50% nominal load changes by setpoint frequency and load variations speed, gather the closed corresponding data acquisition channel of switchgear by programmable data then, the coupling scheme of programmable oscilloscope are set automatically, the bandwidth restriction, automatically read waveform parameter or waveform and send back industry control PC virtual instrument software by gpib bus, virtual instrument software reads data, and with setting value or set waveform and compare, automatically whether judgement meets the demands, and generates test report automatically.
By using the described locomotive switching power supply General Purpose Automatic Test of embodiment of the present invention method, for the locomotive switching power supply veneer provides a general automatically testing platform.One has realized that locomotive switching power supply tests automatically, with the workload that reduces operating personnel, the complicacy that reduces operation, strengthens the accuracy of judging in the testing process, and examining report reliable and that be convenient to safeguard is provided fast.Its two, realized the universalization of locomotive switching power supply test platform, when new Switching Power Supply veneer occurring, only need more changer adapter on the hardware, only need the easy configuration program parameter on the software, can realize required test.Its three, strengthened maintainability, by regular automatically operation checkout routine, can finish the automatic school inspection of all resources of locomotive switching power supply veneer general purpose automatic test system fast.Its four since adopted be easy to use, long-tested gpib bus control technology has superior functions such as low delay, high bandwidth, improved signal transmitting speed and accuracy, strengthened accuracy and the reliability of locomotive switching power supply test macro.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is general-purpose automatic test system for locomotive switching power supply structure composition frame chart 1 of the present invention;
Fig. 2 is general-purpose automatic test system for locomotive switching power supply structure composition frame chart 2 of the present invention;
Fig. 3 gathers switchgear structure composition frame chart for general-purpose automatic test system for locomotive switching power supply programmable data of the present invention; Wherein: the 1-test control system, 2-industry control PC, the 3-PCI-GPIB card, 4-program-controlled electronic load 1, the 5-programmable oscilloscope, 6-program-controlled electronic load 2,7-programmable data collecting unit, the 8-programme-controlled dc power, the program control AC power of 9-, 10-programmable power supply unit, the program control DC load of 11-unit, the 12-programmable data is gathered switchgear, 13-test lead interface module, the tested end interface module of 14-, female mouthful of 15-breakout box, public mouthful of 16-breakout box, 17-connector fit line, female mouthful of 18-AN connector, public mouthful of 19-AN connector, the tested Switching Power Supply of 20-, 21-programmable data Acquisition Instrument, 22-2 * 10 multiplexer switch cards, 23-2 * 4 road multiplexer switch cards.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is a part of embodiment of the present invention, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
A kind of exemplary embodiment as this general-purpose automatic test system for locomotive switching power supply, general-purpose automatic test system for locomotive switching power supply as shown in Figure 1 specifically comprises test control system 1, programmable power supply unit 10, program control DC load unit 11 and programmable data collecting unit 7, programmable power supply unit 10 links to each other with test control system 1 by gpib bus, for tested Switching Power Supply 20 provides excitation, program control DC load unit 11 links to each other with test control system 1 by gpib bus, for tested Switching Power Supply 20 provides load, programmable data collecting unit 7 links to each other with test control system 1 by gpib bus described tested Switching Power Supply 20 responses is gathered.Program control namely is the device that can realize control able to programme.As shown in Figure 2, test macro also comprises various breakout boxs and the adapter that links to each other with tested locomotive switching power supply, comprise the connecting line and the connector that are connected with programmable power supply unit 10, program control DC load unit 11, programmable data collecting unit 7, adapter comprises connecting line and the connector that is connected with tested locomotive switching power supply veneer.Whole connector comprises test lead interface module 13 and tested end interface module 14, and test lead interface module 13 comprises that female mouthful 15 of breakout box, public mouthful 16 of breakout box, connector fit line 17, female mouthful 18 of AN connector, tested end interface module 14 comprise public mouthful 19 of AN connector.Because the hardware frame structure of the general-purpose automatic test system for locomotive switching power supply that embodiment of the present invention adopts adopts the mode of gpib bus to realize whole test system, so versatility and compatibility are very strong.Owing to adopt GPIB test macro, breakout box, fit line, realize being connected with the segmentation of tested Switching Power Supply veneer, so only need to change corresponding adapter, can realize all Switching Power Supply veneers of locomotive control field and the functional test of the new Switching Power Supply veneer of exploitation later on.Simultaneously, adopt the gpib bus technology platform, this bussing technique is the outstanding platform that universally acknowledged bus system is closed Auto-Test System, have that standardization level, standardization are good, high bandwidth, lowly postpone, characteristics such as antijamming capability is strong, so specific embodiment of the invention stability height, good reliability, test speed are fast.
As shown in Figure 3, programmable data collection switchgear 12 further comprises programmable data Acquisition Instrument 21,2 * 10 multiplexer switch cards 22 and 2 * 4 multiplexer switch cards 23 etc.
A kind of exemplary embodiment as this locomotive switching power supply General Purpose Automatic Test method, in conjunction with Fig. 1, the test process that output voltage is described is as follows: after connecting the adapter that mates with the tested engine Switching Power Supply, login virtual instrument software at the industry control PC, open and move corresponding control program, control program is at first selected program control AC power or programme-controlled dc power and program-controlled electronic load, make program control AC power or programme-controlled dc power provide input voltage by the gpib bus transfer control signal, the load of control program-controlled electronic provides the setting load, gather the closed corresponding data acquisition channel of switchgear and read data by programmable data then, and institute's image data sent back industry control PC virtual instrument software by the gpib bus system, virtual instrument software reads the data of sending back to and compares with setting value, automatically whether judgement meets the demands, and generates test report automatically.Virtual instrument software is a kind of software that is applied to virtual instrument.Particularly, virtual instrument (Virtual Instrument) is a kind of can control by software programming, a kind of virtual software device of seeing at the software end of PC.Wherein, LabVIEW is exactly a outstanding virtual instrument programming software, and it is based on TestStand software administration platform.
In conjunction with Fig. 1, the test process of account for voltage regulation is as follows: after connecting the adapter that mates with the tested engine Switching Power Supply, login virtual instrument software at the industry control PC, open and move corresponding control program, control program is at first selected program control AC power or programme-controlled dc power and program-controlled electronic load, make the program-controlled electronic load provide the setting load by the gpib bus transfer control signal, at first provide the specified input voltage of tested Switching Power Supply veneer by program control AC power or programme-controlled dc power, gather the closed corresponding data acquisition channel of switchgear by programmable data then and read tested switch power source output voltage value and institute's image data is sent back industry control PC virtual instrument software by the gpib bus system, virtual instrument software reads the data of sending back to; Provide input voltage higher limit and the input voltage lower limit of tested Switching Power Supply veneer then respectively by program control AC power or programme-controlled dc power, programmable data is gathered switchgear and is sent the tested switch power source output voltage value under two kinds of conditions respectively back to and send virtual instrument software back to, virtual instrument software read collect for three times output voltage values and with calculate voltage regulation factor automatically, and compare with setting value, automatically whether judgement meets the demands, and generates test report automatically.The test of analog voltage regulation, this test macro can be finished the test of input overvoltage protection, input under-voltage protection test etc.The test of voltage adjustment rate is that the reflection power supply keeps nominal load, and output voltage is with a kind of power technology index of variable quantity with the ratio of input voltage variable quantity of input voltage variation.The test of input overvoltage protection is that the reflection power supply keeps nominal load, and when reducing input voltage to certain limit, power protection turn-offs, a kind of power technology index.The input under-voltage protection is that the reflection power supply keeps nominal load, and the rising input voltage is during to certain limit, a kind of power technology index that power protection turn-offs.
In conjunction with Fig. 1, the test process that load regulation is described is as follows: after connecting the adapter that mates with the tested engine Switching Power Supply, login virtual instrument software at the industry control PC, open and move corresponding control program, control program is at first selected program control AC power or programme-controlled dc power and program-controlled electronic load, make program control AC power or programme-controlled dc power provide the specified input voltage of tested Switching Power Supply veneer by the gpib bus transfer control signal, and the load of control program-controlled electronic provides nominal load, gather the closed corresponding data acquisition channel of switchgear by programmable data then and read tested switch power source output voltage value and institute's image data is sent back industry control PC virtual instrument software by the gpib bus system, virtual instrument software reads the data of sending back to; Provide output higher limit and the output load lower limit of tested Switching Power Supply veneer then respectively by the program-controlled electronic load, programmable data is gathered switchgear and is sent the tested switch power source output voltage value under two kinds of conditions respectively back to and send virtual instrument software back to, virtual instrument software read collect for three times output voltage values and with calculate load regulation automatically, and compare with setting value, automatically whether judgement meets the demands, and generates test report automatically.The test of analogy load regulation, this test macro can be finished output overcurrent protection test, output under-voltage protection test, output over-voltage protection test etc.The load regulation test is that the reflection power supply keeps specified input voltage, and output voltage is with a kind of power technology index of variable quantity with the ratio of load variation amount of load variations.
In conjunction with Fig. 1, the process that ripple test is described is as follows: after connecting the adapter that mates with the tested engine Switching Power Supply, login virtual instrument software at the industry control PC, open and move corresponding control program, control program is at first selected program control AC power or programme-controlled dc power, the program-controlled electronic load, programmable oscilloscope, make program control AC power or programme-controlled dc power provide the specified input voltage of tested Switching Power Supply veneer by the gpib bus transfer control signal, and the load of control program-controlled electronic provides nominal load, gather the closed corresponding data acquisition channel of switchgear by programmable data then, the coupling scheme of programmable oscilloscope are set automatically, bandwidth restriction etc., automatically read ripple value (or waveform) and send back the PC virtual instrument software by gpib bus, virtual instrument software reads data, and compare with setting value (or set waveform), automatically whether judgement meets the demands, and generates test report automatically.Ripple is a kind of power technology index that reflection is superimposed upon the DC component that tested Switching Power Supply output DC presses.
In conjunction with Fig. 1, the process that the dynamic load test is described is as follows: after connecting the adapter that mates with the tested engine Switching Power Supply, login virtual instrument software at the industry control PC, open and move corresponding control program, control program is at first selected program control AC power or programme-controlled dc power, the program-controlled electronic load, programmable oscilloscope, make program control AC power or programme-controlled dc power provide the specified input voltage of tested Switching Power Supply veneer by the gpib bus transfer control signal, and setpoint frequency is pressed in the load of control program-controlled electronic and load variations speed cycle between nominal load and 50% nominal load changes, gather the closed corresponding data acquisition channel of switchgear by programmable data then, the coupling scheme of programmable oscilloscope are set automatically, bandwidth restriction etc., automatically read waveform parameter (or waveform) and send back industry control PC virtual instrument software by gpib bus, virtual instrument software reads data, and compare with setting value (or set waveform), automatically whether judgement meets the demands, and generates test report automatically.Dynamic load has reflected that load is by certain frequency periodically variable characteristic within the specific limits.
In conjunction with Fig. 1, the process that efficiency test is described is as follows: after connecting the adapter that mates with the tested engine Switching Power Supply, login virtual instrument software at the industry control PC, open and move corresponding control program, control program is at first selected program control AC power or programme-controlled dc power and program-controlled electronic load, make program control AC power or programme-controlled dc power provide specified input voltage by the gpib bus transfer control signal, the load of control program-controlled electronic provides specified setting load, pass through by program control AC power or programme-controlled dc power and program-controlled electronic load voltage then, current sense function, read data and data are sent back industry control PC virtual instrument software by the gpib bus system, virtual instrument software reads the data of sending back to and analyzes computing, can draw the power conversion efficiency, and compare with setting value, automatically whether judgement meets the demands, and generates test report automatically.
In conjunction with Fig. 1, the process that the switching tube waveform testing is described is as follows: after connecting the adapter that mates with the tested engine Switching Power Supply, login virtual instrument software at the industry control PC, open and move corresponding control program, control program is at first selected program control AC power or programme-controlled dc power and program-controlled electronic load, make program control AC power or programme-controlled dc power provide specified input voltage by the gpib bus transfer control signal, the load of control program-controlled electronic provides nominal load, prompting connects oscilloprobe according to control program then, the basic setup of control program automatic setting programmable oscilloscope, and read waveform, and data are sent back industry control PC virtual instrument software by the gpib bus system, virtual instrument software reads the waveform of sending back to and compares and analyze computing with the setting waveform, both can judge automatically whether the switching tube waveform meets the demands, and generate test report automatically.Above-mentioned output voltage test, voltage regulation factor test, load regulation test, input overvoltage are tested, are imported under-voltage test, output overvoltage test, export control programs such as under-voltage test, output overcurrent test, ripple test, dynamic load test, efficiency test, switching tube waveform testing, can manage integrated by the virtual instrument management software, automatically operation successively, the unified form that generates behind the end of run.Also can only operation step or a few step wherein, generate test report behind the end of run automatically according to operator's needs.Output over-voltage protection is that reflection surpasses certain value when electric power output voltage rises, and power protection turn-offs a kind of power technology index in ground.The output under-voltage protection is that reflection surpasses certain value when electric power output voltage descends, and power protection turn-offs a kind of power technology index in ground.The output overcurrent protection is to reflect when power source loads increases to certain value a kind of power technology index that power protection turn-offs.Switching tube is the switching device of adjusting with operating power in the Switching Power Supply, is generally MOSFET, BJT etc., is a kind of electronic switching device.
Simultaneously, power source single-board general purpose automatic test system of the present invention, can utilize the self-checking function of programmable instrument self, develop the automatic checkout routine of described test macro by virtual instrument technique, and by regularly moving the self check that checkout routine is finished described power source single-board Auto-Test System automatically, the result of self check will determine whether to permit the operator is used described power source single-board Auto-Test System to carry out the test of power source single-board.
In order easily general-purpose automatic test system for locomotive switching power supply and method thereof to be researched and developed and to be tested, embodiment of the present invention has been used modularization programming thought, realize the locomotive switching power supply veneer automatically in the test, also providing simple operation, powerful self-defined test platform for the professional and technical personnel.
Power source single-board general purpose automatic test system of the present invention is not limited to above function, can use virtual instrument software to develop according to the resource of tested single board testing requirement and described test macro.
Because the power source single-board General Purpose Automatic Test method that the specific embodiment of the invention adopts has adopted virtual instrument technique software programming platform, the system automation degree is very high, comprise virtual instrument standard program software (LabVIEW) and virtual instrument standard management software (TestStand), realized that graphic programming controls described test macro, and automatically test result has been analyzed the generation form.Program development personnel, procedure operation personnel's different level rights managements have been realized simultaneously, and for operating personnel provide succinctly friendly interface easily, school checking functions automatically quickly, convenient powerful self-defined test platform.Simultaneously, system resource is abundant, can realize simulating signal and the unlatching such as input voltage signal, input current signal, output voltage signal, output current signal, switching tube waveform of tested power source single-board and turn-off the isoparametric collection of control signal.Among the present invention, can realize measurement, 10 tunnel analog input current signals, the collection of 4 way switch tube wave shapes or the collection of 8 road output ripples of 20 tunnel 0 ~ 200V analog input channel voltage signals simultaneously.
The above only is preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (2)
1. locomotive switching power supply General Purpose Automatic Test method, it is characterized in that, general-purpose automatic test system for locomotive switching power supply comprises: test control system (1), programmable power supply unit (10), program control DC load unit (11) and programmable data collecting unit (7), described test control system (1) comprises industry control PC (2), industry control PC (2) comprises the virtual instrument software module, described programmable power supply unit (10) links to each other with test control system (1) by gpib bus, for tested Switching Power Supply (20) provides excitation, described program control DC load unit (11) links to each other with test control system (1) by gpib bus, for described tested Switching Power Supply (20) provides load, described programmable data collecting unit (7) links to each other with test control system (1) by gpib bus described tested Switching Power Supply (20) response is gathered; Described programmable data collecting unit (7) comprises programmable data collection switchgear (12), and described programmable data is gathered switchgear (12) response of tested Switching Power Supply (20) is gathered; Described method of testing comprises ripple test, described ripple test may further comprise the steps: after connecting the adapter that mates with tested Switching Power Supply (20), in industry control PC (2) login virtual instrument software module, open and move corresponding control program, control program is at first selected program control AC power (9) or programme-controlled dc power (8) and program control DC load unit (11), programmable oscilloscope (5), make program control AC power (9) or programme-controlled dc power (8) provide the specified input voltage of tested Switching Power Supply (20) by the gpib bus transfer control signal, and the program-controlled electronic load of controlling program control DC load unit (11) provides nominal load, gather the closed corresponding data acquisition channel of switchgear (12) by programmable data then, the coupling scheme of programmable oscilloscope (5) are set automatically, the bandwidth restriction, automatically read ripple value or waveform and send back industry control PC (2) virtual instrument software module by gpib bus, the virtual instrument software module reads data, and with setting value or set waveform and compare, automatically whether judgement meets the demands, and generates test report automatically.
2. locomotive switching power supply General Purpose Automatic Test method according to claim 1, it is characterized in that, described method of testing also further comprises the dynamic load test, described dynamic load test may further comprise the steps: after connecting the adapter that mates with tested Switching Power Supply (20), in industry control PC (2) login virtual instrument software module, open and move corresponding control program, control program is at first selected program control AC power (9) or programme-controlled dc power (8) and program control DC load unit (11), programmable oscilloscope (5), make program control AC power (9) or programme-controlled dc power (8) provide the specified input voltage of tested Switching Power Supply (20) by the gpib bus transfer control signal, and setpoint frequency is pressed in the program-controlled electronic load of controlling program control DC load unit (11) and load variations speed cycle between nominal load and 50% nominal load changes, gather the closed corresponding data acquisition channel of switchgear (12) by programmable data then, the coupling scheme of programmable oscilloscope (5) are set automatically, the bandwidth restriction, automatically read waveform parameter or waveform and send back industry control PC (2) virtual instrument software module by gpib bus, the virtual instrument software module reads data, and with setting value or set waveform and compare, automatically whether judgement meets the demands, and generates test report automatically.
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| CN111813072A (en) * | 2020-06-11 | 2020-10-23 | 中车唐山机车车辆有限公司 | Detection system for input and output functions of electronic equipment |
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