CN1609737A - Automatic testing method and apparatus for electromagnetic valve response time and leakage extent - Google Patents
Automatic testing method and apparatus for electromagnetic valve response time and leakage extent Download PDFInfo
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- CN1609737A CN1609737A CN 200410051363 CN200410051363A CN1609737A CN 1609737 A CN1609737 A CN 1609737A CN 200410051363 CN200410051363 CN 200410051363 CN 200410051363 A CN200410051363 A CN 200410051363A CN 1609737 A CN1609737 A CN 1609737A
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Abstract
The automatic detection device for response time and leakage of solenoid valve includes detection circuit and detection fluid pipeline. The detection circuit controls the work valve, vacuum pump and tested fluid valve to alter the tested fluid pipeline; and includes liquid level sensor negative pressure sensor and positive pressure sensor. The detection fluid pipeline includes positive pressure gas source, negative pressure gas source, gas chamber and liquid storing container. The present invention makes it possible to detect the response time and the leakage of solenoid valve simple, accurately and reliably in the same device.
Description
Technical field
The present invention relates to the method for testing and the device of solenoid valve, relate in particular to the automated testing method and the device of solenoid valve response time and leakiness.
Background technology
Solenoid valve is mainly used in the control fluid circuit, i.e. there are two important indicators on gas circuit or liquid road in the real work: 1. response time: after promptly receiving control signal, can how long move, this time is 10～25mS usually.Action too slowly can be because of stopping slowly, holding to such an extent that influence result of use slowly.2. valve is sewed: if valve can not close under closing state extremely fully, just for sewing, sew and can cause gas circuit or the inside, liquid road fluid to stop incessantly.
The solenoid valve test of prior art, the testing valve response time mostly is the mechanical type test, as applying certain hydraulic pressure in the pipeline that connects at an end of valve, place a unsteady object in the pipeline that the other end connects, begin to count the time of movement of objects of floating after the opens solenoid valve immediately to assigned address, this time is the valve events response time just, and concrete timing is finished by microprocessor; Also carry out the indirect test method of response time by detecting electromagnetic property just like Chinese patent ZL97202939 is disclosed.Gas leakage test applies certain air pressure for the end at valve, at a tracheae of a termination of closing, then tracheae is put into water, if bubble is arranged then valve is sewed, no bubble then is no-leak, is to be judged by human eye and whether bubble is arranged.
As seen, to response time test, existing direct measuring method shortcoming is to have flow of liquid to cross valve body, otherwise the object that floats can not move, and if to place the pipeline of the object that floats out-of-level, and under gravity effect, test result also has deviation; To the test that valve is sewed, existing method is to have or not bubble by manually judging, and is very unreliable; How to response time of solenoid valve and leakiness adopt a covering device carry out uniformly easy, accurately with reliably test the solution that never obtains.
Summary of the invention
The technical problem to be solved in the present invention is to avoid above-mentioned the deficiencies in the prior art part, and proposes a kind of method and device that the response time and the leakiness of solenoid valve are carried out easy, accurate and reliable test uniformly.
The technical scheme that the present invention solves the problems of the technologies described above employing is, manufacture and design a kind of solenoid valve response time and leakiness automatic test device, comprise testing circuit and test fluid pipeline, to change response time and the leakiness that the test fluid pipeline obtains tested solenoid valve VT1, described testing circuit comprises clocking capability module, liquid level sensor, logic controller and negative pressure transducer and positive pressure sensor in order to detect the air chamber pressure situation to testing circuit by Control work valve, vacuum pump and tested solenoid valve VT1; Described test fluid pipeline comprises positive pressure gas body source, negative-pressure gas source, air chamber and liquid storage container VR; Described air chamber links to each other with negative pressure transducer, links to each other with positive pressure sensor through valve K7 through valve K3; Described positive pressure gas body source links to each other with air chamber through valve K2 through valve K6, negative-pressure gas source; Air chamber links to each other through the common port of first valve with tested solenoid valve VT1; The normal open end of tested solenoid valve VT1 and/or normal not-go-end link to each other with liquid storage container with the transparent pipeline of liquid level sensor cooperating through second valve and one section; The normal not-go-end of tested solenoid valve VT1 also links to each other with positive pressure sensor through the 3rd valve.
The technical scheme that the present invention solves the problems of the technologies described above employing also comprises, proposes a kind of method that adopts said apparatus to carry out the test of solenoid valve response time, comprises step:
1., described testing circuit Control work valve events, make the positive pressure gas body source be communicated with the common port of tested solenoid valve VT1;
2., described testing circuit Control work valve events, make the normal not-go-end of tested solenoid valve VT1 be communicated with positive pressure sensor.
3., the timing functional module picks up counting in being communicated with in preparing common port that the plus signal action makes tested solenoid valve VT1 and normal not-go-end in the described testing circuit;
4., when the pressure of malleation sensor sensing reaches setting value, have signal and export to testing circuit, testing circuit receives behind the signal and can the control timing finish that this clocking value is the response time of tested solenoid valve VT1.
The technical scheme that the present invention solves the problems of the technologies described above employing also comprises, proposes a kind of method that adopts said apparatus to carry out the test of solenoid valve leakiness, comprises step:
1., described testing circuit Control work valve events, make that the negative-pressure gas source is communicated with the common port of tested solenoid valve VT1, the common port of tested solenoid valve VT1 is communicated with normal not-go-end/normal open end;
2., described testing circuit Control work valve events, make normal not-go-end/normal open end of tested solenoid valve VT1 be communicated with liquid storage container;
3., treat that liquid level sensor detects among the liquid storage container VR liquid and is drawn to that desired location provides signal in the described transparent tube, described testing circuit Control work valve events makes the common port of tested solenoid valve VT1 with the normal open end/often not-go-end is communicated with;
4., described testing circuit Control work valve events, make the positive pressure gas body source be communicated with, and pick up counting with the common port of tested solenoid valve VT1;
5., reach setting value when clocking value, detect the output signal of liquid level sensor, if this signal changes, expression exists sews, and does not sew otherwise do not exist.
Compare with prior art, solenoid valve response time of the present invention and leakiness automated testing method and device are for realizing adopting a covering device to carry out easy, accurate uniformly and test reliably possibility is provided to the response time and the leakiness of solenoid valve.
Description of drawings
Fig. 1 is for detecting the gas circuit synoptic diagram among solenoid valve response time of the present invention and the leakiness automatic test device embodiment.
Fig. 2 is the electrical block diagram of apparatus of the present invention embodiment.
Fig. 3 is for adopting the schematic flow sheet that microprocessor carries out the response time test among apparatus of the present invention embodiment.
Fig. 4 is for adopting the schematic flow sheet that computing machine carries out response time and the automatic test of gas leakage among apparatus of the present invention embodiment.
Fig. 5 is for adopting the schematic flow sheet one that microprocessor leaks gas and tests automatically among apparatus of the present invention embodiment.
Fig. 6 is for adopting the schematic flow sheet two that microprocessor leaks gas and tests automatically among apparatus of the present invention embodiment.
Fig. 7 is the synoptic diagram of negative pressure hysteresis control circuit among apparatus of the present invention embodiment.
Embodiment
Be described in further detail below in conjunction with the most preferred embodiment shown in the accompanying drawing.
Proving installation fluid circuit of the present invention as shown in Figure 1, that test is valve VT1, is the single-pole double-throw (SPDT) valve, and three ports are arranged, and is respectively common port, normal open end and normal not-go-end.The response time of valve is exactly after giving action command of valve, the time of common port and normal not-go-end conducting.Leakiness, can gas leakage and/or leakage, below according to the embodiment concrete condition, with gas leakage be described.Gas leakage is divided into the normal open end and leaks gas and two kinds of normal not-go-end gas leakage: the gas leakage of normal open end is meant after normal open end and common port disconnection, should have gas to leak to the normal open end from common port; Normal not-go-end gas leakage is to end after normal not-go-end and common port disconnection, should not have gas to leak to normal not-go-end from common port.Also have computing machine, microprocessor and hardware circuit to be used for controlling, receive, showing and coordinate the running of total system in the test macro.
Treat the common port of side valve VT1, valve K4, K5 by two series connection are connected to air chamber, are connected to vacuum pump or pressurized air but air chamber ends valve K2 and K6 timesharing usually by two two.For the pressure of monitoring air chamber, used two pressure transducers, one of them is positive pressure sensor, and it ends valve K7 usually by one or two and is connected to air chamber, and another is a negative pressure transducer, and it ends valve K3 usually by one or two and is connected to air chamber.
Treat the normal open end of side valve VT1, be connected to the glass tube of an overcoat optocoupler by one or two usually logical valve K8, the glass tube other end is connected in the water container by pipeline.
Treat the normal not-go-end of side valve VT1, by a T-valve K9, be connected to the glass tube of an overcoat optocoupler, the other end of glass tube is connected in the water container by pipeline.The normal not-go-end of K9 links to each other with another valve K10 again, if K9, K10 move simultaneously, normal not-go-end and the pressure sensor for the treatment of side valve will be coupled together.
The circuit structure of proving installation of the present invention comprises computing machine and testing circuit as shown in Figure 2, and testing circuit comprises again: the Drive and Control Circuit and the negative pressure hysteresis control circuit of microprocessor, tested solenoid valve normal open end photoelectric coupled circuit, pressure transducer, valve; Pressure transducer then comprises positive pressure sensor and negative pressure transducer; Microprocessor is by the drive control circuit operating valve of valve and the action of tested solenoid valve VT1; Microprocessor is by the action of vacuum pump in the negative pressure hysteresis control circuit control negative-pressure gas source.Described microprocessor internal has timing/timing function module.
Adopt proving installation of the present invention to carry out in the computing machine of response time and leakiness test flow process as shown in Figure 4.Computing machine by with the microprocessor communication, send test instruction, obtain test result, and on display, illustrate.
Adopt proving installation of the present invention to carry out the microprocessor flow process of response time and leakiness test shown in Fig. 3,5 and 6.Microprocessor receives the test command from computing machine, and by the On/Off action of operation valve and pump, the timing/timing function module of cooperation microprocessor internal is carried out the measurement of relevant index, and by serial ports test result loopback computing machine.
Adopt apparatus of the present invention test response time, add the compression air at an end of valve, the other end is connected to a pressure transducer.Pick up counting during the operation valve action, have pressure after valve is logical and be delivered to pressure transducer one end, pressure transducer can send signal after experiencing certain pressure, receives that the time of pressure transducer outgoing signal is the response time.
When adopting the gas leakage of apparatus of the present invention testing valve, put into water container at glass tube of a termination of valve and with glass tube, the glass tube top is at optocoupler of liquid level overcoat, and optocoupler can detect liquid or aneroid in the pipe.The valve other end is connected to an air chamber, and air chamber can switch to vacuum or pressurized air.During test, make the valve conducting earlier, air chamber connects vacuum.Because vacuum arranged, water can by on be drawn to the optocoupler place, in a single day optocoupler detects the glass tube this point has liquid to send signal at once, receive signal after microprocessor can control electromagnetic valve close.Then air chamber is connected to pressurized air, if valve gas leakage this moment, the liquid at optocoupler place can be depressed into below the optocoupler, and the optocoupler place also has liquid to think that then valve is air tight after maintenance a period of time, otherwise can think that valve leaks gas.
Fig. 3 has specifically provided the process that microprocessor carries out the response time test: operation valve K4 at first, K5, K6 opens, make pressurized air be added to the common port for the treatment of side valve VT1 by air chamber, then control K9, K10, the normal not-go-end for the treatment of side valve is linked to each other with pressure sensor, side valve VT1 is treated in action then, and begin immediately to clock, because VT1 action back common port and normal not-go-end communicate, the pressure of common port begins to normal not-go-end transmission, after running up to a period of time, after pressure arrives the setting value of positive pressure sensor, positive pressure sensor can be exported a signal, microprocessor system can be calculated automatically and begin to control the VT1 action until the time of receiving between the pressure sensor, is the response valve time.
Fig. 5 has specifically provided the process that microprocessor carries out tested valve normal open end gas leakage test: test gas leakage was divided into for two steps, the first step is imbibition: at first drive vacuum pump, valve K2, air chamber is linked to each other with vacuum pump, simultaneously in order to control vacuum tightness, open valve K3 and negative pressure transducer is connected to air chamber is used for monitoring vacuum.Owing to have vacuum, the water in the water container can slowly be drawn to the normal open end optocoupler place of glass tube, optocoupler has been sent out liquid signal immediately and has been given microprocessor system, and system receives behind the signal that action immediately treats that side valve normal open end closes, and water will rest on the optocoupler place.Second step was plus-pressure: close vacuum pump, close K2, K3, disconnect being connected of vacuum pump, negative pressure transducer and air chamber, and action K9 and K10, the normal not-go-end that communicates with common port is blocked outside valve body, gas leaks from normal not-go-end when preventing to pressurize, and build-up of pressure is not enough to influence test result.Open K6 then and make pressurized air be added to the common port for the treatment of side valve, and keep certain hour by air chamber.If treat side valve gas leakage is arranged, the liquid at optocoupler place can be compressed the below that air pushes back optocoupler; If air tight, liquid can remain on the optocoupler top.So just know by the state of reading optocoupler whether the normal open end for the treatment of side valve has gas leakage.
Fig. 6 has specifically provided the process that microprocessor carries out the normal not-go-end gas leakage of tested valve test: and the gas leakage of test normal open end is similar, just begin first motion test valve, normal not-go-end and common port are communicated, open vacuum again liquid is drawn onto the normal valve optocoupler place of ending, side valve VT1 is treated in action then, normal not-go-end and common port are disconnected, add the compression air at last, and keep a period of time, if liquid drops to below the optocoupler, think that then the normal not-go-end of valve leaks gas, otherwise be air tight.
What require emphasis any is the effect of negative pressure transducer: when using vacuum liquid-absorbing, if vacuum tightness is too high, the speed of imbibition can be very fast, when detecting liquid, treats in a period of time of side valve to thoroughly turn-offing later on optocoupler like this, have too many liquid and rise to more than the optocoupler, if treat that at this moment side valve has small leak, liquid can not drop to below the optocoupler in the test duration, cause small leak to detect, so must be within the specific limits with vacuum degree control.There is a negative pressure transducer to be used for monitoring the vacuum tightness of air chamber among the present invention, when vacuum exceeds the capping value, closes vacuum pump immediately, stop to vacuumize, and have only when vacuum tightness is lower than preset lower limit, just start vacuum pump once more.
Fig. 7 is the control circuit schematic diagram of negative pressure transducer, two adjustable resistance W1 are connected with R2 with the resistance R 1 of a 10K respectively with W2 among the figure, tell two reference voltage RefV_1.95V and Ref_1.85V, the voltage output FY_SIG and the reference voltage RefV_1.95V of negative pressure transducer oppositely are connected to first voltage comparator that its model is the dual comparator circuit U 1 of LM393, second voltage comparator that the voltage output FY_SIG of negative pressure transducer and reference voltage RefV_1.85V forward are connected to U1, relatively export Output1 and Output2 for two and then be connected to Set and the Reset end that model is the D flip-flop U2A of 74LS74, the output of U2A then is connected to the A1 end that model is the data buffer U3 of 74HC245, have in addition the main control signal PUMP_CTRL of a negative pressure transducer be connected to U3 19 pin gating ends.It is 2.5V that described negative pressure transducer is depressed voltage at a normal atmosphere, and vacuum tightness increases voltage and can reduce.When adopting this hysteresis circuitry to vacuumize, just for low, this is closes the vacuum pump signal in the output of U2A when voltage is lower than 1.85V, and the output of turning off back U2A when voltage is higher than 1.95V just is height, and this is opens the vacuum pump signal.And the output of U2A must just can be transferred to the NPN type triode Q1 of final control vacuum pump by the B1 end of U3 at the main control signal PUMP_CTRL of negative pressure transducer when low.
The present invention also can be used to test two and usually ends valves, only the two ends of two-way valve need be used as the common port of T-valve and normal not-go-end during test and test and get final product.
Apparatus of the present invention and method of testing through the practical application check, have following advantage:
1. convenient: valve body to be measured does not have the flow of liquid mistake in the whole test process; The pipeline of pressure transducer is set in any case, to the test result no change;
2. reliable: as to judge to have or not to sew fully and discern automatically, do not need artificial participation by system;
3. after expansion, can test a plurality of valves simultaneously;
4. treat side valve if remove, directly pressure transducer is linked to each other with pump, also can test the response time of various pumps.
Thinking of the present invention is: come pressure sensor with pressure transducer, thereby judge the time of valve events response; Vacuumize imbibition earlier, the follow-up pressure testing valve is sewed, and controls when stop imbibition with glass tube and optocoupler therein, and judges whether to sew according to the below whether the optocoupler liquid level is forced into optocoupler; In order to guarantee vacuum degree control within the specific limits, use negative pressure transducer and hysteresis control circuit is monitored vacuum tightness.Realize that with a covering device time response and leakiness test provide possibility for planning as a whole ground.Based on above thinking the disclosed most preferred embodiment of the present invention is not had creationary simple replacement, change, or do further invention, all belong to the present invention's enforcement.
Claims (10)
1. solenoid valve response time and leakiness automatic test device, comprise testing circuit and test fluid pipeline, testing circuit, is characterized in that to change response time and the leakiness parameter that the test fluid pipeline obtains tested solenoid valve VT1 by Control work valve, vacuum pump and tested solenoid valve VT1:
Described testing circuit comprises clocking capability module, liquid level sensor, logic controller and negative pressure transducer and positive pressure sensor in order to detect the air chamber pressure situation; Described test fluid pipeline comprises positive pressure gas body source, negative-pressure gas source, air chamber and liquid storage container VR; Described air chamber links to each other with negative pressure transducer, links to each other with positive pressure sensor through valve K7 through valve K3; Described positive pressure gas body source links to each other with air chamber through valve K2 through valve K6, negative-pressure gas source; Air chamber links to each other through the common port of first valve with tested solenoid valve VT1; The normal open end of tested solenoid valve VT1 and/or normal not-go-end link to each other with liquid storage container VR with the transparent pipeline of liquid level sensor cooperating through second valve and one section; The normal not-go-end of tested solenoid valve VT1 also links to each other with positive pressure sensor through the 3rd valve.
2. solenoid valve response time as claimed in claim 1 and leakiness automatic test device is characterized in that:
The normal not-go-end and second valve between liquid storage container VR that are positioned at tested solenoid valve VT1 are T-valve K9, and the common port of this T-valve K9 links to each other with the normal not-go-end of tested solenoid valve VT1, and the normal not-go-end of K9 links to each other with positive pressure sensor through valve K10; Described first valve between the common port of air chamber and tested solenoid valve VT1 comprises two K4 and K5; Described valve K4 is a T-valve, and valve K5 is the two common valves that end; The common port of valve K4 links to each other with air chamber, and the normal open end of valve K4 links to each other with valve K5.
3. solenoid valve response time as claimed in claim 1 and leakiness automatic test device is characterized in that:
The Drive and Control Circuit and the negative pressure hysteresis control circuit that also comprise valve in the described testing circuit; Described logic controller adopts microprocessor to realize that described clocking capability module realizes at microprocessor internal; Microprocessor is by the drive control circuit operating valve of valve and the action of tested solenoid valve VT1; Microprocessor is by the action of vacuum pump in the negative pressure hysteresis control circuit control negative-pressure gas source.
4. solenoid valve response time as claimed in claim 3 and leakiness automatic test device is characterized in that:
The negative pressure hysteresis control circuit drives vacuum pump according to output signal FY_SIG and microprocessor control signal PUMP_CTRL from negative pressure transducer in the described testing circuit; This circuit comprises two voltage comparators, and these two comparers all compare with the output signal FY_SIG of negative pressure transducer, and the reference value of setting is variant, in order to realize the sluggishness control of vacuum pump.
5. solenoid valve response time as claimed in claim 1 and leakiness automatic test device is characterized in that:
Liquid level sensor is the optocoupler sensor in the described testing circuit.
6. as arbitrary described solenoid valve response time of claim 1 to 5 and leakiness automatic test device, it is characterized in that:
Also comprise computing machine, and described testing circuit also comprises the computer interface circuit, testing circuit and this computing machine can carry out communication; Computer-controllable system testing circuit carries out solenoid valve response time and leakiness test and/or shows testing result.
7. adopt the described device of claim 1 to carry out the method for solenoid valve response time test, it is characterized in that, comprise step:
1., described testing circuit Control work valve events, make the positive pressure gas body source be communicated with the common port of tested solenoid valve VT1;
2., described testing circuit Control work valve events, make the normal not-go-end of tested solenoid valve VT1 be communicated with positive pressure sensor;
3., the timing functional module picks up counting in being communicated with in preparing common port that the plus signal action makes tested solenoid valve VT1 and normal not-go-end in the described testing circuit;
4., when the pressure of malleation sensor sensing reaches setting value, have signal and export to testing circuit, testing circuit receives behind the signal and can the control timing finish that this clocking value is the response time of tested solenoid valve VT1.
8. adopt the described device of claim 1 to carry out the method for solenoid valve leakiness test, it is characterized in that, comprise step:
1., described testing circuit Control work valve events, make that the negative-pressure gas source is communicated with the common port of tested solenoid valve VT1, the common port of tested solenoid valve VT1 is communicated with normal not-go-end/normal open end;
2., described testing circuit Control work valve events, make normal not-go-end/normal open end of tested solenoid valve VT1 be communicated with liquid storage container;
3., treat that liquid level sensor detects among the liquid storage container VR liquid and arrives that desired location provides signal in the described transparent tube, described testing circuit Control work valve events makes the common port of tested solenoid valve VT1 with the normal open end/often not-go-end is communicated with;
4., described testing circuit Control work valve events, make the positive pressure gas body source be communicated with, and pick up counting with the common port of tested solenoid valve VT1;
5., reach setting value when clocking value, detect the output signal of liquid level sensor, if this signal changes, expression exists sews, and does not sew otherwise do not exist.
9. as the method for solenoid valve leakiness test as described in the claim 8, it is characterized in that:
Liquid level sensor adopts the optocoupler sensor to realize in the described testing circuit.
10. as the method for solenoid valve leakiness test as described in the claim 8, it is characterized in that:
Described testing circuit also comprises the Drive and Control Circuit and the negative pressure hysteresis control circuit of microprocessor, valve; Described clocking capability module realizes at microprocessor internal; Microprocessor is by the drive control circuit operating valve of valve and the action of tested solenoid valve VT1; Microprocessor is by the action of vacuum pump in the negative pressure hysteresis control circuit control negative-pressure gas source; The negative pressure hysteresis control circuit drives vacuum pump according to output signal FY_SIG and microprocessor control signal PUMP_CTRL from negative pressure transducer in the described testing circuit; This circuit comprises two voltage comparators, and these two comparers all compare with the output signal FY_SIG of negative pressure transducer, and the reference value of setting is variant, in order to realize the sluggishness control of vacuum pump, makes negative-pressure gas source internal pressure be kept at setting value.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2004100513634A CN1306350C (en) | 2004-09-03 | 2004-09-03 | Automatic testing method and apparatus for electromagnetic valve response time and leakage extent |
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| CNB2004100513634A CN1306350C (en) | 2004-09-03 | 2004-09-03 | Automatic testing method and apparatus for electromagnetic valve response time and leakage extent |
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| CN103383431A (en) * | 2013-07-06 | 2013-11-06 | 艾通电磁技术（昆山）有限公司 | System for measuring response time of electromagnet |
| CN103399224A (en) * | 2013-07-23 | 2013-11-20 | 万向钱潮股份有限公司 | Novel ABS (antilock brake system) electromagnetic valve response time detection device |
| CN103926945B (en) * | 2014-04-08 | 2017-02-15 | 上海华力微电子有限公司 | Cavity intelligent pressure control system and pressure control method of the same |
| CN103926945A (en) * | 2014-04-08 | 2014-07-16 | 上海华力微电子有限公司 | Cavity intelligent pressure control system and pressure control method of the same |
| CN104913886A (en) * | 2015-04-17 | 2015-09-16 | 温州市特种设备检测研究院 | New method for leakage detection of Freon valve |
| CN104913886B (en) * | 2015-04-17 | 2017-05-17 | 温州市特种设备检测研究院 | Method for leakage detection of Freon valve |
| CN104990676A (en) * | 2015-07-03 | 2015-10-21 | 西安航天动力试验技术研究所 | Test bed valve sealing and operation characteristic detection system and detection method |
| CN105223011A (en) * | 2015-10-23 | 2016-01-06 | 广东高新凯特精密机械股份有限公司 | A kind of device and measuring method thereof detecting guideway clamp reaction time and response time |
| CN106286950A (en) * | 2016-08-25 | 2017-01-04 | 宁波新思创机电科技股份有限公司 | A kind of electromagnetic valve with auto-control function |
| CN109752181A (en) * | 2018-12-29 | 2019-05-14 | 浙江亚力大科技有限公司 | Magnetic valve performance test macro |
| CN109752181B (en) * | 2018-12-29 | 2020-08-11 | 浙江亚力大科技有限公司 | Electromagnetic valve performance test system |
| CN110220680A (en) * | 2019-05-16 | 2019-09-10 | 航天科工防御技术研究试验中心 | Solenoid valve test macro and test method |
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