CN109374201B - Multifunctional pressure calibration device - Google Patents
Multifunctional pressure calibration device Download PDFInfo
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- CN109374201B CN109374201B CN201811317008.5A CN201811317008A CN109374201B CN 109374201 B CN109374201 B CN 109374201B CN 201811317008 A CN201811317008 A CN 201811317008A CN 109374201 B CN109374201 B CN 109374201B
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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
Abstract
The invention discloses a multifunctional pressure calibration device. The device includes: the device comprises an upper computer, an electric pressure source, an air pressure controller, a PLC switch controller, a gas-liquid isolator filter, a sealing oil cylinder, an electromagnetic stop valve, a filter, a detected meter interface, an electric signal connecting terminal, a universal meter, a direct-current power supply, a hydraulic controller, an aviation violet oil sealing oil cylinder, an air pressure test stop valve and an air pressure detected meter interface. The components are connected through a pressure pipeline and a communication circuit, the upper computer is used for system control, the electric pressure source generates gas pressure required by the system, the low-range control is carried out through the gas pressure controller, the high-pressure supplement regulation control is carried out through the hydraulic controller, and the gas pressure drives the sealing oil cylinder to pressurize the interface of the meter to be detected through the gas-liquid isolating filter; the direct current power supply provides an excitation power supply for the tested pressure equipment and the universal meter for output acquisition. The method has the advantages of simple operation, low cost and easy realization, and can respectively carry out full-automatic calibration of various media, multiple ranges and multiple channels on different pressure test equipment.
Description
Technical Field
The invention relates to the technical field of aviation metering, in particular to a multifunctional pressure calibration device.
Background
Pressure calibration devices commonly used at home and abroad all adopt a single medium: the common gas or common liquid can not be mixed with various media by the same pressure calibration device, and the range of each pressure measurement standard is fixed. This results in an increase in the number of pressure gauge configurations and an increase in cost. In addition, the pressure measuring device for corrosive media (such as purple oil media) used under special working conditions cannot be calibrated.
The gas pressure calibration device generally adopts air or nitrogen as a medium, adopts a gas cylinder as a gas source, and adopts a comparison method for calibration through pressure regulation control. The liquid pressure calibration device generally adopts the deficient dibasic ester or the transformer oil as a medium which is non-corrosive, and the liquid in the liquid cup is applied to the tested device by pressurizing through the pressurizing device.
The pressure calibration devices commonly used in the industry at present are a piston type pressure gauge and a digital pressure controller, each device can only be calibrated for one medium, and the measuring range of each device is unique.
For example, a gas piston type pressure gauge provides a gas pressure source through a gas cylinder, the size of gas pressure input is controlled through opening and closing a valve on the piston type pressure gauge, a piston is connected with a detected instrument through a three-way device, a valve is adjusted to apply certain gas pressure, a weight with certain mass is loaded on the piston, and the size of applied pressure is calculated by dividing the mass by the surface area of the piston through the mass of the Ma method. The piston type pressure gauge has low loading speed, and can only calibrate a specific weight combination point under the limitation of the area size of the piston and the mass and the quantity of the weights. And can only be directed to one medium.
The liquid piston type pressure gauge applies liquid in an oil cup to a system through the pressurizing pressure of a pressurizing rod, the standard pressure is determined through the pressure value on the surface of a piston, the principle is the same as that of a gas piston, only a single medium can be calibrated, and the measuring range is limited by the surface area of the piston and the weight and the number of weights.
The digital pressure gauge is calibrated by comparing the standard pressure module with the measured pressure. Only a single pressure medium can be provided as well. The range of measurement is limited by the standard pressure module of the digital pressure gauge.
In the calibration of pressure measurement equipment which takes flame-retardant phosphate hydraulic oil (commonly called purple oil) as a medium, various domestic pressure measurement equipment cannot be calibrated at present, and pipelines and connecting pieces of various domestic existing pressure calibration devices are easily corroded due to the extremely strong corrosivity of the medium, so that pressure leakage is caused, and the pressure calibration device cannot be used for a long time.
Disclosure of Invention
The purpose of the invention is as follows: the invention relates to a multifunctional pressure calibration device which can be used for calibrating by respectively using various different media such as common gas, common liquid, corrosive liquid and the like on the same equipment, and the measuring range is divided into a high-pressure measuring range and a low-pressure measuring range, so that the full-automatic calibration can be simultaneously carried out on a plurality of pressure measuring equipment.
The technical scheme is as follows: a multi-functional pressure calibration device, comprising:
host computer, electrically-operated pressure source, atmospheric pressure controller, PLC on-off controller, gas-liquid isolator filter, sealed hydro-cylinder, electromagnetism stop valve, filter, examined table interface, signal connection terminal, universal meter, DC power supply, hydraulic controller, aviation purple oil seal hydro-cylinder, atmospheric pressure test stop valve, atmospheric pressure examined table interface, wherein:
the upper computer is used for controlling the electric air pressure source, the air pressure controller, the PLC switch controller, the electromagnetic stop valve, the universal meter, the direct-current power supply, the hydraulic controller and the air pressure test stop valve;
the electric pressure source is used for generating continuous gas pressure and controlling the pressure by the gas pressure controller;
when gas medium calibration is required, opening the air pressure test stop valve, closing the electromagnetic stop valve and the air-liquid isolation filter, and providing the standard pressure source for the detected pressure measuring equipment through the air pressure detected meter interface;
when the common liquid medium is required to be calibrated, the air pressure test stop valve is closed, the electromagnetic stop valve in the corrosive medium pipeline and the gas-liquid isolating filter in the corrosive medium pipeline are closed, the electromagnetic stop valve and the gas-liquid isolating filter in the common medium pipeline are opened, the gas pressure is amplified according to a certain proportion through the gas-liquid isolating filter and a hydraulic controller, the common liquid medium in the sealed oil cylinder (hydraulic oil) is driven, and the common liquid medium is provided for a standard pressure source of the detected pressure measuring equipment through a detected meter interface of the common medium;
when the corrosive liquid medium needs to be calibrated, the air pressure test stop valve is closed, the electromagnetic stop valve in the common medium pipeline and the gas-liquid isolating filter in the corrosive medium pipeline are closed, the electromagnetic stop valve and the gas-liquid isolating filter in the corrosive medium pipeline are opened, the gas pressure is amplified according to a certain proportion through the gas-liquid isolating filter and a hydraulic controller, the corrosive liquid medium in the aviation purple oil sealing oil cylinder is driven, and the corrosive liquid medium is provided for a standard pressure source of a detected pressure measuring device through a detected meter interface of the corrosive medium;
when the pressure value required to be calibrated is smaller (not exceeding the range of the air pressure controller), the sealed oil cylinder or the aviation purple oil sealed oil cylinder is directly driven by the gas-liquid isolation filter to output a standard pressure value to a detected meter; when the pressure value to be calibrated is larger (exceeds the air pressure controller), the gas pressure output by the air pressure controller passes through the gas-liquid isolating filter, is amplified according to a certain proportion by the hydraulic controller, and then drives the hydraulic oil cylinder or the aviation purple oil sealing oil cylinder to output the amplified standard pressure value to a detected meter;
the pressure tested meter interface, the tested meter interface in the common liquid medium and the corrosive liquid medium are used for being simultaneously connected with a plurality of tested pressure measuring devices, the direct current power supply respectively provides excitation voltage for the tested pressure measuring devices, and the PLC switch controller respectively controls the universal meter to collect the output values of the tested pressure measuring devices;
and software in the upper computer is used for realizing automatic control and generating verification records.
The technical effects of the invention can be as follows: the invention can save cost, can solve the calibration problem of pressure measurement equipment of various media by only establishing one set of device, and can simultaneously calibrate aiming at multiple channels with different measuring ranges, thereby greatly improving the efficiency of pressure calibration and reducing the cost. And the problem that the pressure measuring equipment of corrosive liquid medium can not be calibrated is solved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic diagram of a multifunctional pressure calibration device according to an embodiment of the invention.
The device comprises a host computer 1, an electric pressure source 2, an air pressure controller 3, a PLC switch controller 4, a gas-liquid isolator 5, a sealed oil cylinder 6, an electromagnetic stop valve 7, a filter 8, a tested meter interface 9, an electric signal connecting terminal 10, a universal meter 11, a direct current power supply 12, a hydraulic controller 13, an aviation UV sealed oil cylinder 14, an air pressure testing stop valve 15 and an air pressure tested meter interface 16.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Features and illustrative embodiments of various aspects of the invention are described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention. The present invention is in no way limited to any specific arrangement and method set forth below, but rather covers any improvements, substitutions and modifications in structure, method, and apparatus without departing from the spirit of the invention. In the drawings and the following description, well-known structures and techniques are not shown to avoid unnecessarily obscuring the present invention.
It should be noted that, in the case of conflict, the embodiments and features of the embodiments of the present invention may be combined with each other, and the respective embodiments may be mutually referred to and cited. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
The system is controlled by an upper computer, an electric pressure source is adopted, the system is controlled by a pneumatic pressure controller, three different direct pressure measuring devices such as common gas, common liquid and corrosive liquid can be respectively calibrated by the principles of a gas-liquid isolating filter, a hydraulic controller amplification and the like, and the three media share one set of pressure control unit and a set of acquisition unit. The system adopts the arrangement of low-pressure and high-pressure measuring ranges to calibrate the pressure in different measuring ranges, each medium can calibrate a plurality of pressure test devices simultaneously, and the system can realize full-automatic control.
Fig. 1 is a schematic diagram of a multifunctional pressure calibration device according to an embodiment of the invention.
As shown in fig. 1, the apparatus (system) mainly includes: the device comprises an upper computer 1, an electric pressure source 2, an air pressure controller 3, a PLC switch controller 4, a gas-liquid isolator 5, a sealing oil cylinder 6, an electromagnetic stop valve 7, a filter 8, a detected meter interface 9, an electric signal connecting terminal 10, a universal meter 11, a direct-current power supply 12, a hydraulic controller 13, an aviation purple oil sealing oil cylinder 14, an air pressure test stop valve 15, an air pressure detected meter interface 16, a pipeline, a connecting circuit and the like. Wherein:
(1) upper computer
The device is communicated with a pneumatic pressure controller, a PLC switch controller, a hydraulic controller, a multimeter, a direct current power supply and the like through a communication control bus. And controlling the equipment and acquiring data.
(2) Electric pressure source
The electric pressure source can generate an air pressure source, compressed air is output after being filtered, deoiled, dried and the like, and the output value can be adjusted according to the requirement.
(3) Air pressure controller
As a pressure regulating device to regulate pressure during the test; when the pressure value is not larger than the preset small-range pressure value, the pressure standard selects a pressure sensor arranged in the air pressure controller as the pressure standard, and the air pressure controller realizes the regulation and control of the pressure. In the wide range part, a pressure sensor built in a hydraulic controller is selected as a pressure standard, and the hydraulic part adopts double media. A pressure sensor is arranged in the rear end of each medium and serves as a standard device of the medium, the pressure sensor is used as a standard when pressure is controlled, and the two sensor media are completely independent to form two independent testing channels. When the hydraulic controller executes pressure control operation, the medium valve at the oil storage cylinder is automatically closed, the testing system is isolated from the air pressure testing end, the hydraulic controller adopts a built-in sensor as a feedback standard, and the air-driven liquid proportional booster pump is used for carrying out pressurization control, so that the pressure control of the testing end is realized.
(4) PLC switch controller and electromagnetic stop valve system
The invention adopts three media of common gas, common liquid and corrosive liquid, the common gas medium is directly generated by a pressure generator and is controlled by a gas pressure controller; the two liquid media are respectively stored in different liquid storage cylinders, the two oil cylinders are connected with a pneumatic controller, and the middle of the two oil cylinders is connected with a gas isolation dryer. Three mediums adopt three sets of completely independent test systems, 3 to 5 test ports are respectively provided, and each output port is provided with an electromagnetic stop valve which can be opened and closed at any time. When different media and different pressure values are tested, software can close some stop valves through a switch controller so as to realize targeted pressure control.
(5) Oil cylinder system
The common liquid medium and the corrosive liquid medium are communicated with the oil storage cylinder and the air pressure controller, and the middle part of the oil storage cylinder is isolated by the gas isolation dryer. And an electromagnetic stop valve is arranged between the two independent test systems for medium selection. The oil cylinder adopts a sealing structure, the pressure resistance exceeds 10MPa, the lower end of the vertical structure stores oil, the top end of the vertical structure is provided with a gas connecting port, and gas is connected with a controller through filtering, drying and the like. There is no isolation pressure difference in the middle of pressure transmission.
(6) Electrical measuring part
Constitute by DC power supply and universal meter, DC power supply and universal meter can provide the test port respectively to 8 delivery outlets, and every delivery outlet goes out and all installs the electricity and measures the terminal, and the instrument of being examined need not to measure the cable with the electricity and carry universal meter and DC power supply department, and the lug connection can at the test terminal of delivery outlet. The universal meter can automatically carry out scanning test on a plurality of output ports without manual switching.
(7) Integrated test bench (interface of the tested meter)
The connector is divided into three independent interfaces of common gas medium, common liquid medium and corrosive liquid medium. The test device is characterized in that a plurality of test ports are respectively provided, each output port is provided with an electromagnetic stop valve, the output port can be opened and closed at any time, each output port is provided with an electric testing terminal, an electric testing cable is not required to be conveyed to a universal meter and a direct-current power supply by a tested instrument, and the tested instrument is directly connected to the test terminal of the output port.
(8) Pressure control of gaseous medium
Outputting a 7MPa pressure source by an electric pressure source, setting the pressure of an air pressure controller to zero, opening an air pressure test stop valve, and installing a to-be-detected meter (closing other stop valves); and (4) testing a pressure regulating output port of the air pressure controller.
(9) Control flow of common liquid medium
Outputting a 7MPa pressure source by an electric pressure source, setting the pressure of an air pressure controller to zero, opening a medium valve of a common liquid oil storage cylinder, opening an outlet stop valve, and installing a to-be-detected meter (closing other stop valves);
determining the test point (judging whether the test point is larger than a preset value), and (when the test point is not larger than the preset value), adjusting the air pressure controller to an output port for testing; when the pressure is larger than the preset pressure, the air pressure controller performs prepressing, the medium valve of the common liquid medium oil storage cylinder is closed, the air pressure controller is arranged to be zero, the pressure of the hydraulic controller is regulated, and the output port is tested.
(9) Corrosive liquid pressure control process
Outputting a 7MPa pressure source by an electric pressure source, setting the pressure of an air pressure controller to zero, opening a medium valve of a corrosive liquid medium oil storage cylinder, opening an output port stop valve, and installing a to-be-detected meter (closing other stop valves);
determining a test point (judging whether the pressure is greater than a preset pressure value) and (when the pressure is not greater than the preset pressure value) pressure regulation of the air pressure controller-output port test; when the pressure is larger than the preset pressure, the air pressure controller is pre-pressed, the medium valve of the corrosive liquid medium oil storage cylinder is closed, the air pressure controller is arranged to be zero, the pressure of the hydraulic controller is adjusted, and an output port is tested.
(9) Electric signal acquisition process
Outputting a direct current power supply: determining output port-output port test end parallel arrangement-upper computer controlling output voltage and reading back output value;
and (3) current output: determining an output port, setting the output port in series, and controlling output current and reading back an output value by an upper computer;
testing with a universal meter: selecting test signals (voltage, millivolt and milliampere), determining an output port, and scanning and acquiring data by using a multimeter.
It should be noted that the above-mentioned flow operations may be combined and applied in different degrees, and for simplicity, implementation manners of various combinations are not described again, and those skilled in the art may flexibly adjust the sequence of the above-mentioned operation steps according to actual needs, or flexibly combine the above-mentioned steps, and the like.
It should be noted that the implementation manner of the functional components shown in the above embodiments may be hardware, software, firmware, or a combination thereof. When implemented in hardware, it may be, for example, an electronic circuit, an Application Specific Integrated Circuit (ASIC), suitable firmware, plug-in, function card, or the like. When implemented in software, the elements of the invention are the programs or code segments used to perform the required tasks. The program or code segments may be stored in a machine-readable medium or transmitted by a data signal carried in a carrier wave over a transmission medium or a communication link. A "machine-readable medium" may include any medium that can store or transfer information. Examples of a machine-readable medium include electronic circuits, semiconductor memory devices, ROM, flash memory, Erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, Radio Frequency (RF) links, and so forth. The code segments may be downloaded via computer networks such as the internet, intranet, etc.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the present invention, and these modifications or substitutions should be covered within the scope of the present invention.
Claims (10)
1. A multi-functional pressure calibration device, comprising:
host computer, electrically-operated pressure source, atmospheric pressure controller, PLC on-off controller, gas-liquid isolator filter, sealed hydro-cylinder, electromagnetism stop valve, filter, examined table interface, signal connection terminal, universal meter, DC power supply, hydraulic controller, aviation purple oil seal hydro-cylinder, atmospheric pressure test stop valve, atmospheric pressure examined table interface, wherein:
the upper computer is used for controlling the electric air pressure source, the air pressure controller, the PLC switch controller, the electromagnetic stop valve, the universal meter, the direct-current power supply, the hydraulic controller and the air pressure test stop valve;
the electric pressure source is used for generating continuous gas pressure and controlling the pressure by the gas pressure controller;
when gas medium calibration is required, opening the air pressure test stop valve, closing the electromagnetic stop valve and the air-liquid isolation filter, and providing the standard pressure source for the detected pressure measuring equipment through the air pressure detected meter interface;
when the common liquid medium is required to be calibrated, the air pressure test stop valve is closed, the electromagnetic stop valve in the corrosive medium pipeline and the gas-liquid isolating filter in the corrosive medium pipeline are closed, the electromagnetic stop valve and the gas-liquid isolating filter in the common medium pipeline are opened, the gas pressure is amplified according to a certain proportion through the gas-liquid isolating filter by a hydraulic controller, the common liquid medium in the sealed oil cylinder is driven, and the gas pressure is provided for a standard pressure source of the detected pressure measuring equipment through a detected meter interface of the common medium;
when the corrosive liquid medium needs to be calibrated, the air pressure test stop valve is closed, the electromagnetic stop valve in the common medium pipeline and the gas-liquid isolating filter in the corrosive medium pipeline are closed, the electromagnetic stop valve and the gas-liquid isolating filter in the corrosive medium pipeline are opened, the gas pressure is amplified according to a certain proportion through the gas-liquid isolating filter and a hydraulic controller, the corrosive liquid medium in the aviation purple oil sealing oil cylinder is driven, and the corrosive liquid medium is provided for a standard pressure source of a detected pressure measuring device through a detected meter interface of the corrosive medium;
when the pressure value required to be calibrated is within a small range, the sealed oil cylinder or the aviation purple oil sealed oil cylinder is directly driven by the gas-liquid isolation filter to output a standard pressure value to a detected meter; when the pressure value to be calibrated is large, the gas pressure output by the gas pressure controller passes through a gas-liquid isolating filter, is amplified according to a certain proportion by the hydraulic controller, and then drives the hydraulic oil cylinder or the aviation purple oil sealing oil cylinder to output the amplified standard pressure value to a detected meter;
the pressure tested meter interface, the tested meter interface in the common liquid medium and the corrosive liquid medium are used for being simultaneously connected with a plurality of tested pressure measuring devices, the direct current power supply respectively provides excitation voltage for the tested pressure measuring devices, and the PLC switch controller respectively controls the universal meter to collect the output values of the tested pressure measuring devices;
and software in the upper computer is used for realizing automatic control and generating verification records.
2. The apparatus of claim 1, wherein:
the corrosive liquid medium is phosphoric acid flame-retardant ester type oil;
the gas medium is air or nitrogen;
common liquid media are esters of lactic acid or transformer oil.
3. The apparatus of claim 1, wherein:
the compressed air pressure range generated by the electric pressure source is as follows: greater than or equal to 0MPa and less than grade 7 MPa.
4. The apparatus of claim 1, wherein:
the control range of the air pressure controller is as follows: greater than the grade 0MPa and less than or equal to 6 MPa.
5. The apparatus of claim 1, wherein:
the electromagnetic stop valve and the air pressure test stop valve are used for being respectively or simultaneously controlled through an upper computer.
6. The apparatus of claim 1, wherein:
and the multimeter is used for measuring current and voltage.
7. The apparatus of claim 1, wherein:
and the current source is used for simultaneously meeting at least 3 exciter voltages for normal operation of the pressure tested device.
8. The apparatus of claim 1, wherein the hydraulic controller comprises:
the two pressure sensors are divided into two independent testing channels for pressurization feedback, and the gas pressure generated by the gas pressure controller can be converted into increased liquid pressure in proportion by performing pressurization control through the gas-driven liquid proportion booster pump.
9. The apparatus of claim 1, wherein:
the pressure gauge interface and the air pressure gauge interface are used for simultaneously installing the number of pressure measurement equipment to be detected as follows: more than or equal to 1 and less than or equal to 5.
10. The device according to any one of claims 1 to 9, wherein the upper computer is a computer or an industrial personal computer for performing visualization operations.
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| CN109900427A (en) * | 2019-04-15 | 2019-06-18 | 上海市计量测试技术研究院 | A kind of automated calibration system and calibration method for electric measuring type pressure gauge |
| 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 |
| 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 |
| 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 |
| CN113029434B (en) * | 2021-03-09 | 2022-07-15 | 江南大学 | Control method of pressure control system of liquid medium for measuring precision detection of pressure instrument |
| CN113029433B (en) * | 2021-03-09 | 2022-05-17 | 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 |
| 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US5837881A (en) * | 1996-12-23 | 1998-11-17 | Martin; Scott | Pressure gauge calibrating device |
| CN2440207Y (en) * | 1999-12-14 | 2001-07-25 | 林晓铭 | Gas-liquid two-phase medium pressure checking device |
| CN2639869Y (en) * | 2003-06-10 | 2004-09-08 | 北京市海淀区中航机电研究所 | Electric pressure checking table |
| CN203216670U (en) * | 2013-04-03 | 2013-09-25 | 长庆石油勘探局技术监测中心 | Pressure gauge concentrated pressure supply batch verification apparatus |
| CN103557990B (en) * | 2013-10-11 | 2016-04-06 | 中国人民解放军63908部队 | The all-round calibrating installation of a kind of manometer equipment |
| CN205785671U (en) * | 2016-07-19 | 2016-12-07 | 中国石油天然气集团公司 | A kind of pressure Multipath batch assay device |
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