CN114518193A - Non-resonant negative step pressure calibration device - Google Patents
Non-resonant negative step pressure calibration device Download PDFInfo
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- CN114518193A CN114518193A CN202210111858.XA CN202210111858A CN114518193A CN 114518193 A CN114518193 A CN 114518193A CN 202210111858 A CN202210111858 A CN 202210111858A CN 114518193 A CN114518193 A CN 114518193A
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- 238000012360 testing method Methods 0.000 claims abstract description 14
- 230000008859 change Effects 0.000 claims abstract description 7
- 238000010304 firing Methods 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 238000011065 in-situ storage Methods 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004164 analytical calibration Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The invention discloses a non-resonant negative step pressure calibration device, and belongs to the technical field of step pressure tests. The invention comprises an outer frame, a pressure sensor to be measured, a pressure chamber, a calibration pressure guiding pipe, a standard pressure sensor, a pressurizing pipe, a flange, an exhaust baffle, a flexible part, an air source and a wave absorbing structure. When carrying out the negative step pressure test, at first install by survey pressure sensor and standard sensor on the pressure chamber, will calibrate and draw the pressure tube to close and die, select corresponding flexible member to install on the flange according to survey pressure sensor range, pressurize in to the pressure chamber through the forcing pipe, when pressure in the pressure chamber reaches the withstand voltage limit of flexible member, the flexible member breaks, gaseous flows out from the pressure chamber fast, the pressure wave of production can be eliminated through the structure of eliminating ripples, then in getting into the air through exhaust damper, survey pressure sensor can receive the change of a quick no resonant negative step pressure. And the medium in the pressure chamber adopts compressed air.
Description
Technical Field
The invention relates to a non-resonant negative step pressure calibration device, in particular to a negative step pressure excitation source with rapidly-changing pressure, and belongs to the technical field of step pressure tests.
Background
With the continuous development of scientific technology, the field of dynamic testing is required to be increased continuously, the current step type pressure calibration device is one of the most widely applied pressure calibration devices, and the step type pressure calibration device can excite the sensor in an experiment, so that the time domain index and the frequency response characteristic of the pressure sensor are obtained. At present, the domestic step pressure signal calibration device mainly uses a positive step signal as a main part, but in the field of oil and gas pipelines, most instruments and meters are mainly used for monitoring whether leakage occurs, the measured signal is a descending negative step signal, most of the existing calibration devices can not produce the negative step signal for testing, some can produce the negative step signal, but the descending edge time is too long, the actual testing requirements can not be met, and the existing calibration devices can only be tested in a laboratory, so that the development of the resonance-free negative step pressure calibration device is very necessary.
Disclosure of Invention
The invention aims to provide a non-resonant type negative step pressure calibration device, wherein the generator can provide a rapidly-changing negative step pressure excitation source and generate large amplitude non-resonant type negative step pressure change. Compared with the traditional step pressure calibration device, the step pressure calibration device has the advantages that the step pressure falling edge is faster, and the high-order characteristic of the pressure sensor can be better excited; the invention adopts the pressure medium as the gas, thereby effectively avoiding the inconveniences of liquid medium leakage, long-time deterioration, need of separately providing a hydraulic source and the like; the invention has simple and reliable structure and can be moved at will according to the test requirements. The invention can also be used for in-situ calibration of instruments which cannot be disassembled.
The purpose of the invention is realized by the following technical scheme.
The invention discloses a non-resonant negative step pressure calibration device which comprises an outer frame, a pressure sensor to be measured, a pressure chamber, a calibration pressure guiding pipe, a standard pressure sensor, a pressurizing pipe, a flange, an exhaust baffle, a flexible part, an air source and a wave absorbing structure.
The generator is the square structure, the pressure chamber is installed on outer frame upper portion, outer frame is placed at desktop or subaerial all can, pressure sensor and calibration induced-pressure pipe are installed at the pressure chamber upside to be surveyed, through threaded connection and sealed, downside installation standard pressure sensor and forcing pipe in the pressure chamber, the pressure chamber lower extreme is the flange, the flexible piece is installed on the flange, make whole pressure chamber be airtight environment, the air supply meets with the pressure chamber through the forcing pipe, exhaust baffle installs on the lateral wall of outer frame, the lower extreme at outer frame is installed to the wave absorption structure.
When a negative step pressure test is carried out, firstly, a measured pressure sensor and a standard sensor are installed on a pressure chamber, a calibration pressure guide pipe is closed and closed, a corresponding flexible part is selected according to the range of the measured pressure sensor and installed on a flange, after all parts of the pressure chamber are sealed, an air source is opened, the pressure chamber is pressurized through the pressure guide pipe, when the pressure in the pressure chamber reaches the pressure-resistant limit of the flexible part, the flexible part breaks, air flows out of the pressure chamber fast, the generated pressure wave can be eliminated through a wave-absorbing structure, then the pressure wave enters the air through an exhaust baffle, the measured pressure sensor can be subjected to the fast change of the resonance-free negative step pressure, and the analysis result is calculated through data acquisition.
Preferably, the wave-absorbing structure is a triangular zigzag structure arranged side by side.
Preferably, the magnitude of the negative step pressure that occurs can be adjusted according to the pressure resistance limit of the flexible member.
Preferably, the medium in the pressure chamber is compressed air.
In order to realize accurate and controllable step pressure amplitude, the invention discloses a non-resonant negative step pressure calibration device, which further comprises a firing pin, an air cylinder and a three-way valve. The pressure value in the pressure chamber is controlled by the air cylinder and the three-way valve, and the flexible part is punctured by matching with the firing pin after the pressure reaches a set pressure value, so that the accurate and controllable step pressure amplitude is realized.
Has the beneficial effects that:
1. the resonance-free negative step pressure calibration device disclosed by the invention can generate a rapid negative step pressure, the amplitude of the pressure can be adjusted according to the pressure-resistant limit of the flexible part, the falling edge of a pressure signal generated by the device is much faster than that of the conventional step pressure generation device, the platform time theory can be infinitely long, and compared with the conventional negative step pressure experiment device, the resonance-free negative step pressure calibration device can realize a rapid negative step pressure signal.
2. According to the non-resonant negative step pressure calibration device disclosed by the invention, the generated pressure wave can be eliminated through the wave elimination structure, and further, the non-resonant negative step pressure change with larger amplitude is generated.
3. The invention discloses a non-resonant negative step pressure calibration device, wherein the medium adopts compressed air, the storage and the transportation are convenient, the air after the test can be directly discharged into the atmosphere, the environment is not polluted, and the treatment is convenient; the air is adopted, and the problems of medium deterioration, pipeline corrosivity, supplement replacement and the like in long-time use are avoided; and the pneumatic reaction is fast, the action is rapid, the maintenance is simple, and the pipeline is not easy to block.
4. Compared with the traditional step pressure calibration device, the resonance-free negative step pressure calibration device has the advantages that the operation is simple, the pollution is avoided, the sensor is not damaged, the generated pressure wave can be eliminated through the wave elimination device, the secondary rebound of the pressure wave can not be generated, the accuracy of the calibration result is not influenced, the durability and the reliability are very high,
5. the non-resonant negative step pressure calibration device disclosed by the invention is portable to carry, and a special calibration pressure pipe interface is designed under the condition that some instruments cannot be disassembled according to the requirements of field in-situ metering test, and the calibration pressure pipe is connected with the instrument to be tested during test, so that the instrument to be tested can be tested without being disassembled, and the convenience of operation and the workload of testers are greatly improved.
6. The invention discloses a non-resonant negative step pressure calibration device, which controls the pressure value in a pressure chamber through an air cylinder and a three-way valve, and realizes accurate and controllable step pressure amplitude by matching with a firing pin to puncture a flexible member after the pressure reaches a set pressure value.
Drawings
Fig. 1 is a schematic diagram of a non-resonant negative step pressure calibration device disclosed in the present invention.
Wherein: the pressure measuring device comprises a frame 1, a measured pressure sensor 2, a pressure chamber 3, a calibration pressure guiding pipe 4, a standard pressure sensor 5, a pressure pipe 6, a flange 7, an exhaust baffle 8, a flexible part 9, an air source 10 and a wave absorbing structure 11.
Detailed Description
The invention is further described with reference to the following figures and examples.
Example 1
As shown in fig. 1, the non-resonant negative step pressure calibration device disclosed in this embodiment includes an outer frame 1, a measured pressure sensor 2, a pressure chamber 3, a calibration pressure introducing pipe 4, a standard pressure sensor 5, a pressurizing pipe 6, a flange 7, an exhaust baffle 8, a flexible member 9, an air source 10, and a wave-absorbing structure 11.
The generator is the square structure, pressure chamber 3 installs in 1 upper portion on outer frame, outer frame 1 is placed at desktop or subaerial all can, pressure sensor 2 to be measured and calibration induced pressure pipe 4 install in 3 upsides of pressure chamber, through threaded connection and sealing, downside installation standard pressure sensor 5 and forcing pipe 6 in the pressure chamber 3, 3 lower extremes of pressure chamber are flange 7, the flexible piece 9 is installed on mounting flange 7, make whole pressure chamber 3 be airtight environment, air supply 10 meets with pressure chamber 3 through forcing pipe 6, exhaust baffle 8 installs wave-absorbing structure 11 on the lateral wall of outer frame 1.
When a laboratory negative step pressure test is carried out, firstly, the gas in the pressure chamber 3 is evacuated, the measured pressure sensor 2 with the measuring range of 1MPa and the standard sensor 5 are arranged on the pressure chamber 3, the calibration pressure guiding pipe 4 is closed and closed, the flexible part 9 with the pressure resistance limit of 0.9MPa is selected according to the measuring range of the pressure sensor 2 to be measured and is arranged on the flange 7, after all parts of the pressure chamber 3 are sealed, the air source 10 is opened, the pressure is filled into the pressure chamber 3 through the pressure pipe 6, when the pressure in the pressure chamber 3 reaches the pressure-resistant limit of the flexible material 9, the flexible material 9 is broken, the gas flows out from the pressure chamber 3 rapidly, the generated pressure wave is eliminated by the wave-absorbing structure 11, then enters the air through the exhaust damper 8, the measured pressure sensor 2 senses a rapid negative step pressure change, and the analysis result is calculated through data collection.
Example 2
As shown in fig. 1, the non-resonant negative step pressure calibration device disclosed in this embodiment includes an outer frame 1, a measured pressure sensor 2, a pressure chamber 3, a calibration pressure introducing pipe 4, a standard pressure sensor 5, a pressurizing pipe 6, a flange 7, an exhaust baffle 8, a flexible member 9, an air source 10, and a wave-absorbing structure 11.
The generator is the square structure, pressure chamber 3 installs in outer frame 1 upper portion, outer frame 1 is placed at desktop or subaerial all can, pressure sensor 2 to be measured and calibration induced pressure pipe 4 install in 3 upsides of pressure chamber, through threaded connection and sealed, downside installation standard pressure sensor 5 and forcing pipe 6 in the pressure chamber 3, 3 lower extremes of pressure chamber are flange 7, the flexible piece 9 is installed on mounting flange 7, make whole pressure chamber 3 be airtight environment, air supply 10 meets with pressure chamber 3 through forcing pipe 6, exhaust baffle 8 installs on the lateral wall of outer frame 1, wave-absorbing structure 11 installs the lower extreme at outer frame 1.
When a field in-situ negative step pressure test is carried out, the range of a pressure sensor 2 to be measured is 0.5MPa, firstly, gas in a pressure chamber 3 is evacuated, the pressure sensor 2 to be measured is connected with a calibration pressure guiding pipe 4, a standard sensor 5 is arranged on the pressure chamber 3, a plug is arranged on the pressure chamber 3 to seal a mounting hole of the sensor to be measured, a flexible part 9 with the pressure-resistant limit of 0.4MPa is selected according to the range of the pressure sensor 2 to be measured and is arranged on a flange 7, after all parts of the pressure chamber 3 are sealed, a gas source 10 is opened, the pressure chamber 3 is charged through a pressure pipe 6, when the pressure in the pressure chamber 3 reaches the pressure-resistant limit of the flexible material 9, the flexible material 9 is broken, the gas rapidly flows out from the pressure chamber 3, the generated pressure wave is eliminated through a wave eliminating structure 11 and then enters the air through an exhaust baffle 8, the pressure sensor 2 to be measured rapidly senses the change of negative step pressure, and calculating an analysis result by collecting data.
The magnitude of the negative step pressure occurring can be adjusted in accordance with the pressure resistance limit of the flexible member 9.
The medium in the pressure chamber 3 is compressed air.
In order to realize accurate and controllable step pressure amplitude, the non-resonant negative step pressure calibration device disclosed in the embodiment further comprises a firing pin, an air cylinder and a three-way valve. The pressure value in the pressure chamber 3 is controlled by the air cylinder and the three-way valve, and the flexible piece is punctured by matching with the firing pin after the pressure reaches a set pressure value, so that the accurate and controllable amplitude of the step pressure is realized.
The mechanical structure of the non-resonant negative step pressure calibration device disclosed by the embodiment has very long service life and long continuous use capability, and the use of the gas medium does not cause damage and pollution to the sensor and the use environment.
The above detailed description is intended to illustrate the objects, aspects and advantages of the present invention, and it should be understood that the above detailed description is only exemplary of the present invention and is not intended to limit the scope of the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (6)
1. The utility model provides a no resonant mode negative step pressure calibrating device which characterized in that: the device comprises an outer frame (1), a pressure sensor (2) to be measured, a pressure chamber (3), a calibration pressure guiding pipe (4), a standard pressure sensor (5), a pressurizing pipe (6), a flange (7), an exhaust baffle (8), a flexible part (9), an air source (10) and a wave absorbing structure (11);
the generator is the square structure, install in outer frame (1) upper portion pressure chamber (3), outer frame (1) is fixed to be placed on the plane, install in pressure chamber (3) upside by pressure sensor (2) and calibration pressure pipe (4), through threaded connection and sealed, downside installation standard pressure sensor (5) and forcing pipe (6) in pressure chamber (3), pressure chamber (3) lower extreme is flange (7), install on mounting flange (7) flexible piece (9), make whole pressure chamber (3) be airtight environment, air supply (10) meet through forcing pipe (6) with pressure chamber (3), exhaust baffle (8) are installed on the lateral wall of outer frame (1), the lower extreme in outer frame (1) is installed in wave-absorbing structure (11).
2. A non-resonant negative step pressure calibration device according to claim 1, wherein: when a negative step pressure test is carried out, firstly, a measured pressure sensor (2) and a standard sensor (5) are installed on a pressure chamber (3), a calibration pressure guide pipe (4) is closed, a corresponding flexible piece (9) is selected according to the measuring range of the measured pressure sensor (2) and installed on a flange (7), after all parts of the pressure chamber (3) are sealed, an air source (10) is opened, the pressure chamber (3) is charged through a pressure pipe (6), when the pressure in the pressure chamber (3) reaches the pressure-resistant limit of the flexible piece (9), the flexible piece (9) is broken, air flows out from the pressure chamber (3) rapidly, generated pressure waves are eliminated through a wave-absorbing structure (11), then the air enters the air through an exhaust baffle (8), and the measured pressure sensor (2) can feel a rapid change of negative step pressure.
3. A non-resonant negative step pressure calibration device according to claim 1 or 2, wherein: the wave absorbing structures (11) are triangular sawtooth structures arranged side by side.
4. A resonance-free negative step pressure calibration device as claimed in claim 1 or 2, wherein: the magnitude of the negative step pressure occurring can be adjusted in accordance with the pressure resistance limit of the flexible member (9).
5. A resonance-free negative step pressure calibration device as claimed in claim 1 or 2, wherein: and the medium in the pressure chamber adopts compressed air.
6. A resonance-free negative step pressure calibration device as claimed in claim 1 or 2, wherein: it also comprises a firing pin, a cylinder and a three-way valve. The pressure value in the pressure chamber (3) is controlled by the air cylinder and the three-way valve, and the flexible part is punctured by matching with the firing pin after the pressure reaches a set pressure value, so that the accurate and controllable amplitude of the step pressure is realized.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210111858.XA CN114518193A (en) | 2022-01-27 | 2022-01-27 | Non-resonant negative step pressure calibration device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210111858.XA CN114518193A (en) | 2022-01-27 | 2022-01-27 | Non-resonant negative step pressure calibration device |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101788366A (en) * | 2010-01-15 | 2010-07-28 | 北京航空航天大学 | Positive/negative pressure signal generating device |
| CN103728095A (en) * | 2014-01-10 | 2014-04-16 | 浙江大学 | Negative step force testing system |
| CN105433947A (en) * | 2014-11-13 | 2016-03-30 | 深圳迈瑞生物医疗电子股份有限公司 | Pneumatic system, fluid analysis system and dynamic pressure adjusting method |
| WO2017083237A1 (en) * | 2015-11-12 | 2017-05-18 | Schlumberger Technology Corporation | Noise reduction for tubewave measurements |
| CN111220322A (en) * | 2019-11-08 | 2020-06-02 | 中北大学 | Negative step calibrating device |
| CN113970403A (en) * | 2021-10-12 | 2022-01-25 | 中国航空工业集团公司北京长城计量测试技术研究所 | Negative step force generation device and method |
-
2022
- 2022-01-27 CN CN202210111858.XA patent/CN114518193A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101788366A (en) * | 2010-01-15 | 2010-07-28 | 北京航空航天大学 | Positive/negative pressure signal generating device |
| CN103728095A (en) * | 2014-01-10 | 2014-04-16 | 浙江大学 | Negative step force testing system |
| CN105433947A (en) * | 2014-11-13 | 2016-03-30 | 深圳迈瑞生物医疗电子股份有限公司 | Pneumatic system, fluid analysis system and dynamic pressure adjusting method |
| WO2017083237A1 (en) * | 2015-11-12 | 2017-05-18 | Schlumberger Technology Corporation | Noise reduction for tubewave measurements |
| CN111220322A (en) * | 2019-11-08 | 2020-06-02 | 中北大学 | Negative step calibrating device |
| CN113970403A (en) * | 2021-10-12 | 2022-01-25 | 中国航空工业集团公司北京长城计量测试技术研究所 | Negative step force generation device and method |
Non-Patent Citations (2)
| Title |
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| 孙金锋 等: "气动助推负阶跃力校准装置研究", 《仪器仪表学报》, vol. 31, no. 02, 15 February 2010 (2010-02-15), pages 459 - 463 * |
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