CN110412455A - A kind of switch testing circuitry and switch testing equipment - Google Patents
A kind of switch testing circuitry and switch testing equipment Download PDFInfo
- Publication number
- CN110412455A CN110412455A CN201910624963.1A CN201910624963A CN110412455A CN 110412455 A CN110412455 A CN 110412455A CN 201910624963 A CN201910624963 A CN 201910624963A CN 110412455 A CN110412455 A CN 110412455A
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- Prior art keywords
- switch
- unit
- switch testing
- measured
- testing circuitry
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
Abstract
The present invention relates to a kind of switch testing circuitries, including measured switch pressure drop Acquisition Circuit, the measured switch pressure drop Acquisition Circuit includes sequentially connected current acquisition unit (2), voltage comparison unit (3), photoelectric relay unit (4), A/D sampling unit (6) and controller, the electric current in circuit (1) where current acquisition unit (2) the acquisition measured switch, the opening and closing of output control photoelectric relay unit (4) of voltage comparison unit (3), then controls the on-off of A/D sampling unit (6) and controller.Compared with prior art, it is equipped with pressure drop Acquisition Circuit, switch ends pressure drop to be measured can be acquired, and guarantees that A/D sampling unit (6) have not received the damage of high input voltage.
Description
Technical field
The present invention relates to Mechatronics control fields, more particularly, to a kind of switch testing circuitry and switch testing
Equipment.
Background technique
Currently, it is innumerable for the type of switch testing equipment, it is most of to be made both for special switching requirements
The single equipment made, when general test are all manual operations, few full automations operations, for much mature production
Product, have been realized in it is increasingly automated, but as many non-standard equipments are almost manually-operated.Originally, for the survey of data
Amount is all using measurer, later because error caused by the inconvenience and manual operation of operation just allows people gradually by folder
Tool and sensor.The sensitivity of sensor determines the precision of test result, manually to mechanical operation much not as good as automation
Equipment.The testing efficiency also determined whether the convenience of fixture.
It is only simple for general nonstandard test equipment to realize test function, for manually-operated convenience, number
According to reading, result judgement there is also more deficiencies.General special test equipment is simple mechanical structure accumulation,
There is no the angles from hommization to design.Such as we test a kind of special key, when test, needs to be fixed in behaviour
Make on platform, if switch band pedestal, we are just directly fixed on station；If switched without band pedestal,
It needs us to be first fixed on pedestal, then pedestal is fixed on station again.Operation extremely inconvenient in this way, just
It will lead to working efficiency.Due to being the special measurement equipment of special key, so before there is no the application in terms of patent, but equipment
A whole set of TT&C system technology usually application or it is very much, the degree of automation is not high, and cannot intuitively show test
Even as a result, display test result, it is desired nonetheless to whether artificial performance, function to judge switch up to standard, big in this way
The big degree for reducing automation.It needs to carry out if using this equipment largely to train and various aspects knowledge accumulation if substituted,
Time-consuming and laborious, manually-operated uncertain factor largely effects on the result of test too much.So only pass through technique improvement,
Traditional purely mechanicization equipment is to Semi-automatic device, and even to the transformation of automatic equipment, this needs phase in the process
The circuit design answered is to match automation function.
In carrying out circuit design process, current test equipment, which does not have, is acquired test to switch two sides pressure drop
Function.
Summary of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of switch testing equipment
Circuit and switch testing equipment.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of switch testing circuitry, including measured switch pressure drop Acquisition Circuit, the measured switch pressure drop acquisition electricity
Road includes sequentially connected current acquisition unit, voltage comparison unit, photoelectric relay unit, A/D sampling unit and controller,
The electric current in circuit, the output of voltage comparison unit control photoelectric relay list where the current acquisition unit acquisition measured switch
The opening and closing of member then controls the on-off of A/D sampling unit and controller.
The current acquisition unit includes Hall element.
Circuit where the measured switch is series loop.
Circuit where the measured switch is the series loop being made of power supply, resistance and measured switch.
The power supply is 27V power supply.
The current acquisition unit is connected with voltage comparison unit by the way that amplifying unit is isolated.
The A/D sampling unit includes S7-200smart AE08.
The controller is PLC.
A kind of switch testing equipment, including any switch testing circuitry of claim 1-8.
Compared with prior art, the invention has the following advantages that
(1) it is equipped with pressure drop Acquisition Circuit, switch ends pressure drop to be measured can be acquired.
(2) opening and closing of the output control photoelectric relay unit of voltage comparison unit, then controls A/D sampling unit and control
The on-off of device processed can be such that A/D sampling A/D chip is sampled according to the current signal in circuit where measured switch.
(3) when measured switch is closed, place loop current is big, and both ends pressure drop is small, it is ensured that A/D sampling unit is not by excessively high
The damage of input voltage.
(4) current acquisition unit is connected with voltage comparison unit by the way that amplifying unit is isolated, and is put to the signal of acquisition
Greatly be isolated, eliminate the measurement error as caused by ground loop.
(5) Hall element has that precision height, good linearity, bandwidth, response be fast, overload capacity by force and does not lose circuit-under-test
Many advantages, such as energy.
Detailed description of the invention
Fig. 1 is electrical block diagram of the invention；
Fig. 2 is isolation amplifying unit schematic diagram of the invention；
Fig. 3 is photoelectric relay cell schematics of the invention；
Fig. 4 is voltage comparison unit schematic diagram of the invention；
Fig. 5 is current acquisition cell schematics of the invention；
Appended drawing reference:
1 is measured switch place circuit；2 be current acquisition unit；3 be voltage comparison unit；4 be photoelectric relay list
Member；5 be isolation amplifying unit；6 be A/D sampling unit.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.The present embodiment is with technical solution of the present invention
Premised on implemented, the detailed implementation method and specific operation process are given, but protection scope of the present invention is not limited to
Following embodiments.
Embodiment
The present embodiment provides a kind of switch testing circuitry and including the switch testing equipment of pressure drop Acquisition Circuit.
Switch testing circuitry includes measured switch pressure drop Acquisition Circuit, and measured switch pressure drop Acquisition Circuit includes successively
The current acquisition unit 2 of connection, voltage comparison unit 3, photoelectric relay unit 4, A/D sampling unit 6 and controller, electric current are adopted
Collect the electric current in circuit 1 where unit 2 acquires measured switch, the output control photoelectric relay unit 4 of voltage comparison unit 3 is opened
It closes, then controls the on-off of A/D sampling unit 6 and controller；Current acquisition unit 2 includes Hall element；Where measured switch
Circuit 1 is the series loop being made of power supply, resistance and measured switch, and power supply is 27V power supply；Current acquisition unit 2 and electricity
Comparing unit 3 is pressed to connect by isolation amplifying unit 5；A/D sampling unit 6 includes S7-200smart AE08；Controller is
PLC。
The scheme that switch testing equipment uses is electrical, mechanical, software co-design.
Electrical arrangement: switch testing equipment uses the control mode of PLC+ touch screen, and wherein touch screen carries out human-computer interaction,
Switch testing parameter is set, and PLC is controller, controls electronic slide unit and is moved forward and backward, and drives mechanical actuating mechanism movement, and realization is opened
The pressing of pass, while switch connection signal is improved, both ends when 3 output end signal of voltage comparison unit is as switch connection
The trigger signal of voltage drop acquisition makes PLC start to acquire the voltage drop of switch ends；Device front end is performed simultaneously to pass equipped with pressure
Sensor, switch and whens sensor contacts, can acquire the pressing force of switch in real time；It is filled on the opposite position of executing agency simultaneously
There is electronic ruler, when pressure sensor and switch contact, at this moment travel position is executed as switch over travel initial position for acquisition
Mechanism continues forward, until switch internal contact closure, acquires at this moment travel position, as switch over travel final position, twice
The difference of stroke is tested switch over travel.
Mechanical conceptual: the major function of the mechanical part of switch testing equipment be realize switch pressing, while make stroke,
The signals such as pressing force, voltage drop enter observing and controlling case.Measuring and controlling equipment is made of observing and controlling case and station two parts, wherein observing and controlling luggage
Containing touch screen, PLC unit, A/D sampling unit 6, electric-motor drive unit, signal transmission unit, power supply unit etc., station includes
Electronic slide unit, force snesor, electronic ruler, tested switch etc., two parts exchange signal and data by cable connection.
Software scenario: the software section of switch testing equipment includes upper computer and lower computer, and host computer uses touch screen group
State design, provides human-computer interaction interface, switch testing parameter, such as switchtype is arranged by man-machine interface, parameter passes through total
Line mode passes to slave computer, while in man-machine interface display switch test result.PLC software is using MicroWin Step7 ladder
The design of shape graph-based language, controls electronic slide unit and moves by setup parameter, drives mechanical actuating mechanism to realize the pressing of switch, adopts simultaneously
Set electron ruler, pressing force sensor signals, output control signal.
It is provided with pressure fall-off test button on panel, only when this button is connected, has electric current by just connecting photoelectricity relay
Device unit 4 carries out voltage signal acquisition just on the voltage-drop loading of switch ends to A/D sampling A/D chip input channel.
The composition and parameter of switch testing circuitry or switch testing equipment main element
1) controller-siemens PLC smart series of PLC
It uses Siemens S7-200PLC for control core, integrates/16 output of 24 input totally 40 digital quantity I/O points, can connect
7 expanding elements are connect, largest extension to 248 railway digital amount I/O Dian Huo, 35 tunnel analog quantity I/O point, deposit by 13K byte program and data
Store up space, 6 independent 30kHz high-speed counters, the independent 20kHz high-speed pulse output in 2 tunnels, have PID controller, 2
RS485 communication/programming port has PPI communications protocol, MPI communications protocol and free way ability to communicate, is completely adapted to
Complicated middle-size and small-size control system.
2) operation interface-step section MT4000 array of touch screen
It can be communicated with PLC realizations several greatly absolutely, the simulation of energy direct-on-line, off-line simulation, large-capacity user configuration program are deposited
The function of storing up the fitting customer demand such as space, macro-instruction compatible with standard C language, can effectively complete rapidly field data and adopt
Collection, operation, control.
3) manual-automation integrated electric slide unit
Measuring and controlling equipment has automatically and manually two kinds of operating modes, wherein it is mainly used for Product Assembly debugging process manually, from
Dynamic process is mainly used for product function and performance test.The select button of automatic/hand, benefit under manual mode are provided on panel
Slide unit is shaken with handwheel to advance, and is advanced under automatic mode using motor driven slide unit.
4) electronic ruler and signal transmitting device
It needs to measure pressing stroke in switch press test process, which has self-reparability, stroke 50mm, resistance
5K Ω, linear precision 0.1%, repeatable accuracy 0.01mm, maximum operating speed 5m/s export 0-5V voltage signal, and the signal is defeated
Enter A/D sampling A/D chip and carries out A/D sampling.Electronic ruler major parameter is as shown in table 1.
1 electronic ruler major parameter of table
2 pressure sensor major parameter of table
5) pressure sensor and signal transmitting device
Need to measure the pressing force snesor that pressing force transducer range is 100N in switch press test process, containing mating
Signal transmitting device (transmitter operating voltage 12V or 24V), switch press force transformation at 0-10V the or 0-5V signal of standard,
It is sent into A/D sampling A/D chip and carries out A/D sampling, calculate pressing force.Major parameter is as shown in table 2.
6) fictitious load
Equipment requirement provides 27V/3A electric current, maximum current when simulation measured switch works, it is therefore desirable to provide simulation
It loads, high-power gold shell resistance, 9 Ω of resistance value is used in design, power amplification chooses 9 Ω/300W power electricity to 4 times
Resistance, precision 1%.
The operation logic of switch test equipment entirety is explained below.When measured switch has been secured to workbench
On, start button is pressed, the manual/auto button on lower panel is then pressed, motor is powered on.When by the pressure on lower panel
When dropping testing button, the two-way indicator light on panel can light the on-state come inside display switch.In a control unit, it uses
Corresponding motor configuration controls motor in PLC, and motor with mobile platform connection by shaft coupling by motor shaft and platform
Lead screw connection, lead screw transmission drive the movement of entire platform.When the contact of electronic ruler sensor encounters baffle, indicate quasi-
The actual measurement stage of standby access switch.When the contact of the contact of pressure gauge sensor and switch is encountered, the detection on panel starts
Indicator light can light.Then motor will continue to invert, run to always it is anticipated that overtravel position, PLC will be given
The instruction rotated forward is issued, " pressing force-pressing stroke " curve can be provided according to the physical location of switch on touch screen, make people straight
That sees finds out variation, and the data calculated in real time can be shown on the touchscreen.When motor is just going to specified position, until making to press
The contact and switch contact of force snesor are detached from, then the instruction for stopping motor being issued to PLC, and are issued to touch screen and saved data
The instruction of at the time of point, can directly be transferred the data for having surveyed product in flash disk with the later period convenient for tester, greatly facilitate survey
Examination personnel accurately assess the qualification rate of same a collection of product.Special emphasis is: 1. in order to make the control of motor more
Accurately, the data measured are more accurate, and protective program is provided with specially in PLC program.Due to surpassing on the interface of touch screen
Stroke variable can be configured by display box, but tester often forgets about the setting to overtravel variable, this
Sample just easilys lead to pressure sensor and crosses range, to make the sensitivity of pressure sensor, precision reduce, so being provided with super
The initial value of stroke variable, thus avoids well and motor is allowed to invert always.2. under normal circumstances, motor can be set according to us
The mode thought goes to run, once but indicator light does not light normally in circuit, the logic judgment in program may can
Failure, also results in motor and inverts always, so in hardware aspect, using photosensitive sensor as the limit signal of platform,
Specifically, two photosensitive sensors are installed on the baffle of movable pedestal in integral type slide unit, when entire test is flat
When platform moves under motor driven, in order to avoid test platform and baffle collide, so acquiring two photosensitive biographies using PLC
Limit signal of the signal of sensor as test platform can play the role of protection and collide, this is in program to motor operation
Second protection mechanism.3. judging for surveying the qualified of parameter in touch screen, can be shown one by one on interface, once motor
Theoretical emergency situations are encountered in the process of running, and acoustic-optic alarm will call the police and the reset button on panel is pressed, hand
It is dynamic that platform is moved to original state.
Measured switch pressure drop Acquisition Circuit, including sequentially connected current acquisition unit 2, voltage comparison unit 3, photoelectricity after
Electric appliance unit 4, A/D sampling unit 6 and controller, the electric current in circuit 1, voltage where current acquisition unit 2 acquires measured switch
The opening and closing of the output control photoelectric relay unit 4 of comparing unit 3, then controls the on-off of A/D sampling unit 6 and controller.
The voltage drop of contact when needing to measure switch connection during switch testing, this voltage drop are generally several millivolts to tens millis
Volt, when the switch is closed, this voltage drop are loaded into A/D sampling input terminal, and when the switches are opened, the voltage of switch ends is
Supply voltage 27V, and A/D sampled input voltage≤10V will damage A/ if 27V is loaded for a long time on analog input channel
D sampling A/D chip.Therefore photoelectric relay unit 4 is provided on Differential Input channel, when having closed the switch electric current and passing through, then
Photoelectric relay unit 4 is connected, on the voltage-drop loading to A/D sampling input channel of switch ends, carries out voltage signal acquisition.
Switch testing equipment includes pcb board, touch screen, electronics rule displacement sensor, pressure sensor connector, 57 steppings
Motor driver starts stop button, alarm lamp, scram button, SIEMENS PLC, internal/external power switching push button, 20 needles boat
It inserts, 24 needle air plugs etc.
Pcb board is connected with each other by the external screw thread in bolt, copper post, in order to avoid the electrostatic on mesosphere board is to circuit board
Interference is generated, so copper post is particularly added among mesosphere board and pcb board, and pcb board and copper post are entirely through hole
Internal screw thread is fixed on mesosphere board.Touch screen is fixed on the front panel by embedded fixation device.Pressure sensor connection
Device is diagonally fixed on mesosphere board by bolt, nut.During electronics rule displacement sensor passes through bolt, nut is diagonally fixed on
Between on laminate.57 stepper motor drivers need to hold up to install, on bolt, plate since the position that line is arranged is special
Threaded hole be threadedly coupled and is fixed on mesosphere board.Start stop button to carry out by the hole on included external screw thread, plate
It is threadedly coupled and fixes on the front panel.Alarm lamp be threadedly coupled by the hole on included external screw thread, plate and is fixed on
On front panel.Scram button be threadedly coupled by the hole on included external screw thread, plate and be fixed on the front panel.Siemens
PLC needs to connect by external guide rail due to can not be directly installed on mesosphere board, first by guide rail by bolt, nut into
Row is threadedly coupled and is fixed on mesosphere board, then by Siemens it is included install guide rail hole PLC is fixed on it is already installed
On guide rail.Internal/external power switching push button be threadedly coupled by the hole on included external screw thread, plate and is fixed on rear panel.20
Needle air plug be threadedly coupled and is fixed on rear panel by hole on included external screw thread, plate and matched thin slice nut.24
Needle air plug be threadedly coupled and is fixed on rear panel by hole on included external screw thread, plate and matched thin slice nut.
Rationally distributed inside the observing and controlling case of switch testing equipment, line, cabling between each component all leave
Enough spaces, when design, consider the disturbing factors of many complexity, and the interference of generation is dropped before testing as far as possible
To minimum, not generate too much influence to product test result.The design of pcb board is improved to the accurate of fall-of potential test
Degree, and a millivolt step voltage can be captured.
Switch testing equipment includes RX24 gold lattice resistance, gold resistance, guide rail power supply 24V, guide rail power supply 27V.
RX24 gold lattice resistance carries out screw thread by the internal thread hole on bolt, bottom laminate and is diagonally fastened on bottom
On laminate.Gold resistance be threadedly coupled by the internal thread hole on bolt, bottom laminate and is fixed on bottom laminate.In order to
The electrostatic on bottom laminate is avoided to have an impact power source internal, so being specially added to copper post, guide rail power supply in connection
24V is threadedly coupled by included internal thread hole with the external screw thread of copper post, then the internal thread hole, the spiral shell that are carried by copper post
Bolt, which be threadedly coupled, is fixed on bottom laminate.Guide rail power supply 27V is also in this way, by the outer of included internal thread hole and copper post
Screw thread is threadedly coupled, then internal thread hole, the bolt carried by copper post be threadedly coupled and be fixed on bottom laminate.
Component in bottom plate is fewer, mainly can generate a large amount of heat when being powered due to gold resistance, produce
Raw heat can all be oriented to bottom plate.In order to avoid the influence to component, so copper post is added in connection, so that two pieces
Power supply by heat vacantly so as not to being interfered.In order to which the heat that power supply is generated distributes, thermal paste, In specially are coated in bottom laminate
Two cooling fans are also installed on rear panel.
This equipment improves precision, efficiency and the degree of automation, and performance, the function for test switch provide better judgement
Foundation.
Claims (9)
1. a kind of switch testing circuitry, which is characterized in that including measured switch pressure drop Acquisition Circuit, the measured switch pressure
Dropping Acquisition Circuit includes sequentially connected current acquisition unit (2), voltage comparison unit (3), photoelectric relay unit (4), A/D
Sampling unit (6) and controller, the electric current in circuit (1), voltage compare where current acquisition unit (2) the acquisition measured switch
The opening and closing of output control photoelectric relay unit (4) of unit (3) then controls leading to for A/D sampling unit (6) and controller
It is disconnected.
2. a kind of switch testing circuitry according to claim 1, which is characterized in that the current acquisition unit
It (2) include Hall element.
3. a kind of switch testing circuitry according to claim 1, which is characterized in that returned where the measured switch
Road (1) is series loop.
4. a kind of switch testing circuitry according to claim 3, which is characterized in that returned where the measured switch
Road (1) is the series loop being made of power supply, resistance and measured switch.
5. a kind of switch testing circuitry according to claim 4, which is characterized in that the power supply is 27V power supply.
6. a kind of switch testing circuitry according to claim 1, which is characterized in that the current acquisition unit
(2) and voltage comparison unit (3) passes through isolation amplifying unit (5) connection.
7. a kind of switch testing circuitry according to claim 1, which is characterized in that the A/D sampling unit (6)
Including S7-200smart AE08.
8. a kind of switch testing circuitry according to claim 1, which is characterized in that the controller is PLC.
9. a kind of switch testing equipment, which is characterized in that including any switch testing circuitry of claim 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910624963.1A CN110412455A (en) | 2019-07-11 | 2019-07-11 | A kind of switch testing circuitry and switch testing equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910624963.1A CN110412455A (en) | 2019-07-11 | 2019-07-11 | A kind of switch testing circuitry and switch testing equipment |
Publications (1)
| Publication Number | Publication Date |
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| CN110412455A true CN110412455A (en) | 2019-11-05 |
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ID=68361131
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910624963.1A Pending CN110412455A (en) | 2019-07-11 | 2019-07-11 | A kind of switch testing circuitry and switch testing equipment |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2821594Y (en) * | 2005-07-19 | 2006-09-27 | 江苏省电力公司南京供电公司 | Switch mechanical property detector |
| CN104181462A (en) * | 2014-09-12 | 2014-12-03 | 中国科学院上海高等研究院 | Measuring circuit for breakover voltage drop of semiconductor switch device |
| CN105116322A (en) * | 2015-09-11 | 2015-12-02 | 国家电网公司 | System and method for testing circuit breaker auxiliary switch |
| CN109307839A (en) * | 2018-11-23 | 2019-02-05 | 哈尔滨工业大学 | The circuit of contact drop is tested during ac electric apparatus electrical endurance |
| CN109731804A (en) * | 2018-12-29 | 2019-05-10 | 上海工程技术大学 | A kind of torque and size detecting device of automobile-used torsional spring |
-
2019
- 2019-07-11 CN CN201910624963.1A patent/CN110412455A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2821594Y (en) * | 2005-07-19 | 2006-09-27 | 江苏省电力公司南京供电公司 | Switch mechanical property detector |
| CN104181462A (en) * | 2014-09-12 | 2014-12-03 | 中国科学院上海高等研究院 | Measuring circuit for breakover voltage drop of semiconductor switch device |
| CN105116322A (en) * | 2015-09-11 | 2015-12-02 | 国家电网公司 | System and method for testing circuit breaker auxiliary switch |
| CN109307839A (en) * | 2018-11-23 | 2019-02-05 | 哈尔滨工业大学 | The circuit of contact drop is tested during ac electric apparatus electrical endurance |
| CN109731804A (en) * | 2018-12-29 | 2019-05-10 | 上海工程技术大学 | A kind of torque and size detecting device of automobile-used torsional spring |
Non-Patent Citations (2)
| Title |
|---|
| 沈亦纯，等: "直线扳动航空开关疲劳测试系统设计与开发", 《计算机测量与控制》 * |
| 赵勇，等: "基于LabVIEW的航电开关测试系统设", 《化工自动化及仪表》 * |
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