CN109374201A - Multifunctional pressure calibration device - Google Patents
Multifunctional pressure calibration device Download PDFInfo
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- CN109374201A CN109374201A CN201811317008.5A CN201811317008A CN109374201A CN 109374201 A CN109374201 A CN 109374201A CN 201811317008 A CN201811317008 A CN 201811317008A CN 109374201 A CN109374201 A CN 109374201A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L27/00—Testing or calibrating of apparatus for measuring fluid pressure
- G01L27/002—Calibrating, i.e. establishing true relation between transducer output value and value to be measured, zeroing, linearising or span error determination
- G01L27/005—Apparatus for calibrating pressure sensors
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- General Physics & Mathematics (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention discloses a kind of multi-functional pressure calibrating installations.The device includes: host computer, electric press source, atmospheric pressure controller, PLC switch controller, gas-liquid isolator filter, sealed cylinder, electromagnet cut off valve, filter, checklist interface, electric signal connection terminal, multimeter, DC power supply, hydraulic controller, aviation purple oil seal oil cylinder, air pressure test shut-off valve, air pressure spare parts list interface.Each component is connected by pressure piping, communication line, system control is carried out by host computer, gas pressure needed for the generation system of electric press source, low amounts process control, hydraulic controller progress high pressure supplement adjusting control are carried out by atmospheric pressure controller, gas pressure drives sealed cylinder to pressurize and gives checklist interface by gas-liquid guard filter；Tested press device excitation power supply is supplied to by DC power supply, multimeter carries out output acquisition.Operation of the present invention is simple, the at low cost, Full-automatic calibration that is easily achieved, can carry out a variety of media, multrirange section, multichannel to different pressures test equipment respectively.
Description
Technical field
The present invention relates to the technical fields of aviation metering, more particularly, to a kind of multi-functional pressure calibrating installation.
Background technique
At home and abroad usually used pressure calibration device is all using Single Medium: common gases or common liq, together
One pressure calibration device cannot use a variety of media with, and the range ability of every pressure measurement standard is also fixed.
This resulted in pressure measurement standard configuration quantity increase and cost increase.In addition it is situated between to the corrosivity used under special operation condition
The pressure measuring device of matter (such as purple oil medium) can not be calibrated.
Gas pressure calibrating installation is generally used air or nitrogen as medium, passes through pressure as gas source using gas cylinder
Control is adjusted to be calibrated using the method compared.Fluid pressure calibrating installation is generally using thanks to two acid esters or transformer oil conduct
Medium, these media be all it is non-corrosive, pressurizeed by pressurizing device, the liquid in liquid cup be applied to equipment under test.
Commonly used pressure calibration device has piston gage and digital pressure controller, these pressure in industry at present
Calibrating installation is all that each device can only be calibrated individually for a kind of medium, and the range ability of every covering device is also only
One.
Such as gas piston formula pressure gauge is to provide pneumatic supply by gas cylinder, passes through the valve switch on piston gage
The size for opening control pressure input, is connected piston with tested instrument by three-way device, and control valve applies certain air pressure, living
The counterweight for loading certain mass beyond the Great Wall applies stressed size divided by piston face product by Ma method quality to calculate.This work
Plug pressure gauge loading velocity is low, and being limited by piston area size and counterbalance mass, quantity can only be to specific counterweight combined spot
It is calibrated.And a kind of medium can only be directed to.
Liquid in lubricating cup is applied in system by fluid piston type pressure gauge by pressure rod moulding pressure, passes through piston
The pressure value that surface is subject to determines normal pressure, and principle can only carry out as gas piston for a kind of single medium
Calibration, and range ability is limited by piston face product size and counterweight weight, quantity.
Digital pressure gauge is calibrated by being compared between normal pressure module and tested pressure measurement.Same
A kind of single pressure medium can be provided.It is also unique that range ability is limited by digital pressure gauge normal pressure module.
In the pressure measuring device calibration for being medium for flame-retardant phosphate esters hydraulic oil (being commonly called as purple oil), domestic at present
All kinds of pressure metering devices can not be calibrated, because the medium has extremely strong corrosivity, so domestic existing all kinds of pressure calibrations
The pipeline and connector of device are highly susceptible to corrode, and cause leakage to be pressed, to can not be used for a long time.
Summary of the invention
Goal of the invention: the present invention is to study a kind of multi-functional pressure calibrating installation to use respectively on the same device
A variety of different mediums such as common gases, common liq, corrosive liquids are calibrated, and range ability is divided into high pressure and low pressure
Two range sections can carry out Full-automatic calibration for multiple pressure measuring devices simultaneously.
A kind of technical solution: multi-functional pressure calibrating installation, comprising:
Host computer, electric press source, atmospheric pressure controller, PLC switch controller, gas-liquid isolator filter, sealing
Oil cylinder, electromagnet cut off valve, filter, checklist interface, electric signal connection terminal, multimeter, DC power supply, hydraulic controller,
Shut-off valve, air pressure spare parts list interface are tested in aviation purple oil seal oil cylinder, air pressure, in which:
Host computer, for electric pneumatic source, atmospheric pressure controller, PLC switch controller, electromagnet cut off valve, general-purpose
Table, DC power supply, hydraulic controller, air pressure test shut-off valve are controlled；
Electric press source carries out pressure size control by atmospheric pressure controller for generating lasting gas pressure；
It when needing to carry out gas medium calibration, opens air pressure and tests shut-off valve, close electromagnet cut off valve and gas-liquid isolation
Filter is supplied to the pressure source of tested pressure measuring device standard by air pressure checklist interface；
When needing to carry out common liquid medium calibration, closes air pressure and test shut-off valve, close in corrosive media pipeline
Electromagnet cut off valve and corrosive media pipeline in gas-liquid guard filter, open generic media pipeline in electromagnet cut off valve
With gas-liquid guard filter, gas pressure is put by gas-liquid guard filter by hydraulic controller according to a certain percentage
Greatly, the common liquid medium in sealed cylinder (hydraulic oil) is driven, tested pressure is supplied to by the checklist interface of generic media
The pressure source of force measuring device standard；
When needing to carry out corrosive liquid medium calibration, closes air pressure and test shut-off valve, close in generic media pipeline
Electromagnet cut off valve and corrosive media pipeline in gas-liquid guard filter, open corrosive media pipeline in electromagnetism cut-off
Valve and gas-liquid guard filter, gas pressure are carried out by gas-liquid guard filter by hydraulic controller according to a certain percentage
Amplification drives the corrosive liquid medium in aviation purple oil seal oil cylinder, is supplied to by the checklist interface of corrosive media
The pressure source of tested pressure measuring device standard；
When the range ability for (being less than atmospheric pressure controller) when needing the pressure value calibrated smaller, by gas-liquid every
Sealed cylinder or aviation purple oil seal oil cylinder outputting standard pressure value are directly driven to checklist from filter；When need to calibrate
When pressure value is larger when (be more than atmospheric pressure controller), the gas pressure that is exported by atmospheric pressure controller by gas-liquid every
From amplifying rear-guard hydraulic cylinder or aviation purple oil seal oil cylinder after filter according to a certain percentage by hydraulic controller
Amplified reference pressure value is exported to checklist；
Checklist interface in air pressure checklist interface, common liquid medium and corrosive liquid medium, for connecing simultaneously
Multiple tested pressure measuring devices are respectively supplied to tested pressure measuring device driving voltage by DC power supply, are switched and controlled by PLC
Device processed controls multimeter respectively and is acquired to the output valve to multiple tested pressure measuring devices；
Software in host computer is for realizing automatic control, generation calibrating record.
Technical effect of the invention may is that the invention being capable of save the cost, it is only necessary to which establishing set of device just can solve
The calibration problem of the pressure measuring device of all kinds of media, and can be calibrated simultaneously for the multichannel of different ranges, it mentions significantly
The high efficiency of pressure calibration, reduces cost.And the pressure measuring device that solves corrosive liquid medium can not be calibrated
Problem.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, will make below to required in the embodiment of the present invention
Attached drawing is briefly described, it is therefore apparent that drawings described below is only some embodiments of the present invention, for this
For the technical staff in field, without creative efforts, it can also be obtained according to these attached drawings other attached
Figure.
Fig. 1 is the multi-functional pressure calibrating installation schematic diagram of one embodiment of the invention.
Wherein, 1- host computer, 2- electric press source, 3- atmospheric pressure controller, 4-PLC switch controller, 5- gas-liquid every
From device, 6- sealed cylinder, 7- electromagnet cut off valve, 8- filter, 9 checklist interfaces, 10- electric signal connection terminal, 11- general-purpose
Shut-off valve, 16- air pressure quilt are tested in table, 12- DC power supply, 13- hydraulic controller, 14- aviation purple oil seal oil cylinder, 15- air pressure
Examine table interface.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described.Obviously, described embodiment is
A part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiments of the present invention, those skilled in the art
Without making creative work, every other embodiment obtained, shall fall within the protection scope of the present invention.
The feature and illustrative examples of various aspects of the invention is described more fully below.In following detailed description
In, many details are proposed, in order to provide complete understanding of the present invention.But come for those skilled in the art
It says it will be apparent that the present invention can be implemented in the case where not needing some details in these details.Below to reality
The description of example is applied just for the sake of providing and better understanding to of the invention by showing example of the invention.The present invention is never
It is limited to any specific setting and method set forth below, but covering finishes under the premise of without departing from the spirit of the present invention
Structure, method, any improvement of device, substitutions and modifications.In the the accompanying drawings and the following description, well known structure and skill is not shown
Art is unnecessary fuzzy to avoid causing to the present invention.
It should be noted that in the absence of conflict, the feature in the embodiment of the present invention and embodiment can be tied mutually
It closes, each embodiment mutually can be referred to and be quoted.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
Present system has host computer to be controlled, and using an electric press source, carries out by atmospheric pressure controller
Control, by gas-liquid guard filter, the principles such as hydraulic controller amplification can be respectively to common gases, common liq, corrosivity
Three kinds of direct pressure measuring devices of difference such as liquid are calibrated, and three kinds of media share a set of pressure control unit and acquisition is single
Member.System carries out the pressure calibration of different range abilities using the setting of two range sections of low pressure and high pressure, and every kind of medium can be same
When calibrate multiple pressure test equipments, and system can be realized automatic control.
Fig. 1 is the multi-functional pressure calibrating installation schematic diagram of one embodiment of the invention.
As shown in Figure 1, the device (system) specifically includes that host computer 1, electric press source 2, atmospheric pressure controller 3,
PLC switch controller 4, gas-liquid isolator 5, sealed cylinder 6, electromagnet cut off valve 7, filter 8, checklist interface 9, electric signal connect
10 multimeter 11 of connecting terminal, DC power supply 12, hydraulic controller 13, aviation purple oil seal oil cylinder 14, air pressure test shut-off valve 15,
Air pressure checklist interface 16 and pipeline and connection line etc..Wherein:
(1) host computer
Pass through Communication Control bus and atmospheric pressure controller, PLC switch controller, hydraulic controller, multimeter and straight
The communication such as galvanic electricity source.Control & data acquisition is carried out to above equipment.
(2) electric press source
Electric press source can produce pneumatic supply, and compressed gas is exported after the processing such as oil removing, drying, exported by filtering
Value, which can according to need, to be adjusted.
(3) atmospheric pressure controller
Pressure is adjusted during the test as pressure adjustment device；When being not more than pre- small-range pressure value, pressure
Pressure sensor built in standard application gas pressure regulator realizes the tune to pressure by atmospheric pressure controller as pressure criteria
Section and control.In wide range part, pressure criteria selects the pressure sensor built in hydraulic controller, since this hydraulic part is adopted
With double media.In built-in standard of the pressure sensor as the medium in each medium rear end, in control pressure
Shi Zuowei standard uses, and two sensor mediums are completely independent, and forms two-way independent test channel.Control is executed in hydraulic controller
When press operation, the dielectric valve at oil storage cylinder is automatically closed, and test macro is isolated with air pressure test lead, built in hydraulic controller use
Sensor as feedback standards, pressurization control is carried out by gas drive liquid proportional booster pump, realizes the pressure control of test lead.
(4) PLC switch controller and electromagnet cut off valve system
Present invention employs three kinds of common gases, common liq, corrosive liquids media, and common gases medium is directly by pressing
Forcer generates, and has gas pressure regulator control；And two liquid mediums are respectively stored in different liquid storage cylinders, two oil
Cylinder is all connected with gas pressure regulator, and centre is connected by gas barrier drier.Three kinds of media use three sets of completely self-contained surveys
Test system, each provides 3 to 5 test mouths, and each delivery outlet has an electromagnet cut off valve, can be switched on and off at any time
The delivery outlet.When different medium and different pressures value are tested by switch controller, software can close certain shut-off valves, with
Realize that targetedly pressure controls.
(5) cylinder system
Common liquid medium and corrosive liquid medium, oil storage cylinder and gas pressure regulator connection, centre are done by gas barrier
Dry device isolation.The centre connected with two independent test macros is respectively mounted with an electromagnet cut off valve, can be used for medium choosing
It selects.Oil cylinder uses sealing structure, and pressure resistance has gas connection ports more than 10MPa, the oil storage of vertical structure lower end, top, and gas passes through
Filtering, dry etc. are connected with controller.Without isolation pressure difference among pressure transmission.
(6) electrical measurement part
It being made of DC power supply and multimeter, DC power supply and multimeter can provide respectively test port to 8 delivery outlets,
Each delivery outlet goes out to be fitted with electrical measurement terminal, and tested instrument is not necessarily to for electrical measurement cable being transported at multimeter and DC power supply,
It is connected directly between the calibrating terminal of delivery outlet.Multimeter can be scanned test to multiple delivery outlets automatically, without artificial
Switching.
(7) combined test stand (checklist interface)
It is divided into three common gases medium, common liquid medium, corrosive liquid medium independent interfaces.It provides respectively more
A test mouth, each delivery outlet have an electromagnet cut off valve, can be switched on and off the delivery outlet at any time, and each delivery outlet goes out
It is fitted with electrical measurement terminal, tested instrument is connected directly between defeated it is not necessary that electrical measurement cable to be transported at multimeter and DC power supply
The calibrating terminal of outlet.
(8) gas medium pressure control
Electric press source exports 7MPa pressure source-atmospheric pressure controller pressure zero setting-air pressure and tests shut-off valve opening-peace
It fills checklist (closing of other shut-off valves)；Atmospheric pressure controller pressure regulation-delivery outlet test.
(9) common liquid medium control flow
Electric press source exports 7MPa pressure source-atmospheric pressure controller pressure zero setting-common liq oil storage cylinder dielectric valve
Opening-delivery outlet shut-off valve is opened-installs checklist (closing of other shut-off valves)；
Determine test point (judging whether > preset level), (when being not more than) atmospheric pressure controller tune-delivery outlet is surveyed
Examination；(when being greater than) atmospheric pressure controller precompressed-common liquid medium oil storage cylinder dielectric valve closing-gas pressure regulator zero setting-
Hydraulic controller pressure regulation-delivery outlet test.
(9) corrosive liquids pressure control flow
Electric press source exports 7MPa pressure source-atmospheric pressure controller pressure zero setting-corrosive liquid medium oil storage cylinder
Dielectric valve opening-delivery outlet shut-off valve is opened-installs checklist (closing of other shut-off valves)；
Determine test point (judging whether > preset pressure value)-(when being not more than) atmospheric pressure controller pressure regulation-output
Mouth test；(when being greater than) atmospheric pressure controller precompressed-corrosive liquid medium oil storage cylinder dielectric valve closing-atmospheric pressure control
Device zero setting processed-hydraulic controller pressure regulation-delivery outlet test.
(9) electrical signal collection process
DC power supply output: determine that delivery outlet-delivery outlet test lead is arranged in parallel-PC control output voltage simultaneously readback
Output valve；
Electric current output: determine that delivery outlet-delivery outlet is arranged in series-PC control output electric current and readback output valve；
Multimeter test: selection test signal (voltage, millivolt, milliampere)-determines delivery outlet-multimeter scanning collection number
According to.
It should be noted that above-mentioned flow operations can carry out different degrees of combined application, for simplicity, repeating no more
The sequence of above-mentioned operating procedure can be carried out spirit according to actual needs by various combined implementations, those skilled in the art
Adjustment living, or above-mentioned steps are subjected to the operation such as flexible combination.
It should be noted that the implementation of functional unit shown in above-described embodiment can be hardware, software, firmware
Or their combination.When realizing in hardware, it may, for example, be electronic circuit, specific integrated circuit (ASIC), fit
When firmware, plug-in unit, function card etc..When being realized with software mode, element of the invention is used to execute required task
Program or code segment.Perhaps code segment can store in machine readable media or by carrying in carrier wave program
Data-signal is sent in transmission medium or communication links." machine readable media " may include being capable of storage or transmission information
Any medium.The example of machine readable media includes electronic circuit, semiconductor memory devices, ROM, flash memory, erasable ROM
(EROM), floppy disk, CD-ROM, CD, hard disk, fiber medium, radio frequency (RF) link, etc..Code segment can via such as because
The computer network of special net, Intranet etc. is downloaded.
Finally it should be noted that: the above embodiments are merely illustrative of the technical solutions of the present invention, but protection of the invention
Range is not limited thereto, and anyone skilled in the art in the technical scope disclosed by the present invention, can be thought easily
It is modified or replaceed to various equivalent, these, which are modified or replaceed, should all be included within the scope of the present invention.
Claims (10)
1. a kind of multi-functional pressure calibrating installation characterized by comprising
Host computer, electric press source, atmospheric pressure controller, PLC switch controller, gas-liquid isolator filter, sealed cylinder,
Electromagnet cut off valve, filter, checklist interface, electric signal connection terminal, multimeter, DC power supply, hydraulic controller, aviation are purple
Shut-off valve, air pressure spare parts list interface are tested in oil seal oil cylinder, air pressure, in which:
Host computer, for electric pneumatic source, atmospheric pressure controller, PLC switch controller, electromagnet cut off valve, multimeter, straight
Galvanic electricity source, hydraulic controller, air pressure test shut-off valve are controlled；
Electric press source carries out pressure size control by atmospheric pressure controller for generating lasting gas pressure；
It when needing to carry out gas medium calibration, opens air pressure and tests shut-off valve, close electromagnet cut off valve and gas-liquid isolation filtering
Device is supplied to the pressure source of tested pressure measuring device standard by air pressure checklist interface；
When needing to carry out common liquid medium calibration, closes air pressure and test shut-off valve, close the electricity in corrosive media pipeline
Gas-liquid guard filter in magnetic shut-off valve and corrosive media pipeline, the electromagnet cut off valve opened in generic media pipeline are gentle
Liquid guard filter, gas pressure are amplified by gas-liquid guard filter by hydraulic controller according to a certain percentage,
The common liquid medium in sealed cylinder (hydraulic oil) is driven, tested pressure is supplied to by the checklist interface of generic media and is surveyed
Measure the pressure source of equipment standard；
When needing to carry out corrosive liquid medium calibration, closes air pressure and test shut-off valve, close the electricity in generic media pipeline
Gas-liquid guard filter in magnetic shut-off valve and corrosive media pipeline, open corrosive media pipeline in electromagnet cut off valve and
Gas-liquid guard filter, gas pressure are put by gas-liquid guard filter by hydraulic controller according to a certain percentage
Greatly, drive aviation purple oil seal oil cylinder in corrosive liquid medium, by the checklist interface of corrosive media be supplied to by
Examine the pressure source of pressure measuring device standard；
When the range ability for (being less than atmospheric pressure controller) when needing the pressure value calibrated smaller, it was isolated by gas-liquid
Filter directly drives sealed cylinder or aviation purple oil seal oil cylinder outputting standard pressure value to checklist；When the pressure that needs are calibrated
When being worth larger when (being more than atmospheric pressure controller), the gas pressure exported by atmospheric pressure controller was isolated by gas-liquid
Amplify rear-guard hydraulic cylinder or the output of aviation purple oil seal oil cylinder after filter according to a certain percentage by hydraulic controller
Amplified reference pressure value is to checklist；
Checklist interface in air pressure checklist interface, common liquid medium and corrosive liquid medium, it is multiple for connecing simultaneously
Tested pressure measuring device is respectively supplied to tested pressure measuring device driving voltage by DC power supply, by PLC switch controller
Control multimeter is acquired the output valve to multiple tested pressure measuring devices respectively；
Software in host computer is for realizing automatic control, generation calibrating record.
2. the apparatus according to claim 1, which is characterized in that wherein:
Corrosive liquid medium is the fire-retardant esters pressure oil of phosphoric acid；
Gas medium is air or nitrogen；
Common liquid medium is to lose two acid esters or transformer oil.
3. the apparatus according to claim 1, which is characterized in that wherein:
The compressed air pressure range that electric press source generates are as follows: be more than or equal to 0MPa and be less than grade 7MPa.
4. the apparatus according to claim 1, which is characterized in that wherein:
The control range of atmospheric pressure controller is: greater than grade 0MPa and it is less than or equal to 6MPa.
5. the apparatus according to claim 1, which is characterized in that wherein:
Shut-off valve is tested in electromagnet cut off valve and air pressure, for separately or concurrently being controlled by host computer.
6. the apparatus according to claim 1, which is characterized in that wherein:
Multimeter, for measuring electric current and voltage.
7. the apparatus according to claim 1, which is characterized in that wherein:
Current source, the driver voltage of the normal work of the pressure equipment under test for meeting at least three or more simultaneously.
8. the apparatus according to claim 1, which is characterized in that hydraulic controller includes:
Two pressure sensors are divided into two independent TCH test channels and carry out boosting feedback, increased by gas-powered liquid fraction
Press pump carries out pressurization control, the gas pressure that atmospheric pressure controller generates proportionally can be converted into the liquid pressure increased
Power.
9. the apparatus according to claim 1, which is characterized in that wherein:
The tested pressure measuring device quantity of checklist interface and air pressure by part table interface, for installing simultaneously are as follows: be more than or equal to 1
It is a and be less than or equal to 5.
10. device described in any one of -9 according to claim 1, which is characterized in that host computer is for being visualized
The computer or industrial personal computer of operation.
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| CN109900427B (en) * | 2019-04-15 | 2024-06-04 | 上海市计量测试技术研究院 | Automatic calibration system and calibration method for electric measurement type pressure gauge |
| CN112284616A (en) * | 2019-07-25 | 2021-01-29 | 北京康斯特仪表科技股份有限公司 | Gas pressure interface device |
| CN110440983A (en) * | 2019-09-16 | 2019-11-12 | 大唐半导体科技有限公司 | A kind of control method for fully automatic for the calibration of air compressor machine sensor parameters |
| CN110440982A (en) * | 2019-09-16 | 2019-11-12 | 大唐半导体科技有限公司 | A kind of full-automatic control system for the calibration of air compressor machine sensor parameters |
| CN110849538A (en) * | 2019-11-27 | 2020-02-28 | 中国航空工业集团公司北京长城计量测试技术研究所 | Multi-channel parallel output automatic standard pressure generator based on different pressure ranges |
| CN112461489B (en) * | 2020-11-25 | 2022-09-23 | 中国空气动力研究与发展中心高速空气动力研究所 | Electronic scanning valve reference pressure control system for low-pressure measurement and application method |
| CN112461489A (en) * | 2020-11-25 | 2021-03-09 | 中国空气动力研究与发展中心高速空气动力研究所 | Electronic scanning valve reference pressure control system for low-pressure measurement and application method |
| CN113029434A (en) * | 2021-03-09 | 2021-06-25 | 江南大学 | Pressure control system and method of liquid medium for measuring precision detection of pressure instrument |
| CN113029433A (en) * | 2021-03-09 | 2021-06-25 | 江南大学 | Pressure control system and method for gas medium for pressure instrument measurement accuracy detection |
| CN113447234A (en) * | 2021-04-27 | 2021-09-28 | 中国空气动力研究与发展中心设备设计与测试技术研究所 | Wind tunnel electronic pressure scanning valve traceability device and traceability method thereof |
| CN114486068B (en) * | 2021-12-24 | 2023-11-21 | 昆明五威科工贸有限公司 | Pressure sensor performance parameter verification testing device |
| CN114486068A (en) * | 2021-12-24 | 2022-05-13 | 昆明五威科工贸有限公司 | Pressure sensor performance parameter calibration testing arrangement |
| CN115479720A (en) * | 2022-08-30 | 2022-12-16 | 中国航空工业集团公司北京长城计量测试技术研究所 | Matrix type multi-range pressure batch calibration module and method |
| CN116448314A (en) * | 2023-06-12 | 2023-07-18 | 乐山市计量测试所 | Independent pressure source and pressure gauge online detection method |
| CN116448314B (en) * | 2023-06-12 | 2023-08-29 | 乐山市计量测试所 | Independent pressure source and pressure gauge online detection method |
| CN117432680A (en) * | 2023-06-28 | 2024-01-23 | 中国人民解放军海军航空大学 | Aircraft fluid pressure channel calibration system |
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