CN111964816B - Grating pressure sensor for detecting pipeline pressure and measuring system with same - Google Patents
Grating pressure sensor for detecting pipeline pressure and measuring system with same Download PDFInfo
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- CN111964816B CN111964816B CN202010836255.7A CN202010836255A CN111964816B CN 111964816 B CN111964816 B CN 111964816B CN 202010836255 A CN202010836255 A CN 202010836255A CN 111964816 B CN111964816 B CN 111964816B
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- cylinder
- grating
- pressure
- pressure sensor
- measurement
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- 238000009530 blood pressure measurement Methods 0.000 claims abstract description 28
- 238000005259 measurement Methods 0.000 claims abstract description 18
- 239000012530 fluid Substances 0.000 claims abstract description 11
- 238000007789 sealing Methods 0.000 claims description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- 239000010935 stainless steel Substances 0.000 claims description 6
- 229910000906 Bronze Inorganic materials 0.000 claims description 5
- 229910052790 beryllium Inorganic materials 0.000 claims description 5
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 claims description 5
- 239000010974 bronze Substances 0.000 claims description 5
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 claims description 5
- 239000013013 elastic material Substances 0.000 claims description 4
- 239000013307 optical fiber Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- DMFGNRRURHSENX-UHFFFAOYSA-N beryllium copper Chemical compound [Be].[Cu] DMFGNRRURHSENX-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/24—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet
- G01L1/242—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet the material being an optical fibre
- G01L1/246—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet the material being an optical fibre using integrated gratings, e.g. Bragg gratings
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
- G01K11/3206—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres at discrete locations in the fibre, e.g. using Bragg scattering
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L11/00—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00
- G01L11/02—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00 by optical means
- G01L11/025—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00 by optical means using a pressure-sensitive optical fibre
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/0092—Pressure sensor associated with other sensors, e.g. for measuring acceleration or temperature
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/04—Means for compensating for effects of changes of temperature, i.e. other than electric compensation
Abstract
The application provides a grating sensor for detecting pipeline pressure, grating pressure sensor includes: a three-way cylinder, a first cylinder of the three-way cylinder having a cylinder inlet for connecting a line; pressure measurement gratings and temperature compensation gratings disposed in the second cylinder and the third cylinder of the three-way cylinder; the plug is used for plugging at least one position of the second cylinder and the third cylinder; when the fluid in the pipeline flows into the second cylinder and the third cylinder of the three-way cylinder from the cylinder inlet of the three-way cylinder, the pressure in the pipeline can be obtained by calculating the measurement values of the pressure measurement grating and the temperature compensation grating. Compared with the prior art, the grating pressure sensor for detecting the pipeline pressure can improve the measurement precision and the application range, and can eliminate the influence of the temperature on the grating pressure sensor, so that the pipeline pressure measurement is more accurate.
Description
Technical Field
The application belongs to the technical field of sensors, and particularly relates to a grating pressure sensor for detecting pipeline pressure and a measuring system with the grating pressure sensor.
Background
A pressure line refers to a tubular device for transporting a fluid medium under certain pressure conditions. In the transportation process of the pipeline, factors such as hydraulic impact, temperature change, artificial damage and the like caused by pressure control of the fluid reduce the compressive strength of the pipeline, so that the pipeline is invalid, the fluid in the pipeline is easy to overflow, and resources and the environment are wasted. Therefore, pressure monitoring in the fluid line is of great importance.
At present, the pressure monitoring of the pipeline is mainly realized by an electronic pressure gauge, but under the conditions of high temperature, high pressure and corrosion, the stability and the reliability of the electronic pressure gauge are problematic.
Disclosure of Invention
It is an object of the present application to provide a grating pressure sensor for detecting line pressure and a measurement system having the same to solve or mitigate at least one of the problems of the background art.
In one aspect, the technical solution provided by the present application is: a grating pressure sensor for sensing line pressure, the grating pressure sensor comprising:
a three-way cylinder, a first cylinder of the three-way cylinder having a cylinder inlet for connecting a line;
pressure measurement gratings and temperature compensation gratings disposed in the second cylinder and the third cylinder of the three-way cylinder;
the plug is used for plugging at least one position of the second cylinder and the third cylinder;
when the fluid in the pipeline flows into the second cylinder and the third cylinder of the three-way cylinder from the cylinder inlet of the three-way cylinder, the pressure in the pipeline can be obtained by calculating the measurement values of the pressure measurement grating and the temperature compensation grating.
In a preferred embodiment of the present application, the pressure measurement grating and the temperature compensation grating are fixed along a circumferential direction of the second cylinder and the third cylinder of the three-way cylinder.
In a preferred embodiment of the present application, the inner bores of the second cylinder and the third cylinder have the same size, and the wall thicknesses of the second cylinder and the third cylinder are different.
In a preferred embodiment of the present application, one of the second cylinder and the third cylinder, which has a thicker wall, is connected to the plug by a screw.
In a preferred scheme of this application, be equipped with the seal groove with the inboard circumference of end cap threaded connection's drum, set up the sealing washer in the seal groove, the sealing washer sets up the end cap with the coupling part of drum.
In a preferred embodiment of the present application, the three-way cylinder is made of an elastic material, including but not limited to beryllium bronze, aluminum, stainless steel.
In a preferred embodiment of the present application, the plug is made of a hard material, which includes but is not limited to beryllium bronze, aluminum, stainless steel, etc.
On the other hand, the technical scheme provided by the application is as follows: a measurement system for detecting line pressure, the measurement system comprising:
a grating pressure sensor as described in any one of the above;
the modulation and demodulation instrument is connected with the pressure measurement grating and the temperature compensation grating and is used for analyzing the wavelength values measured by the pressure measurement grating and the temperature compensation grating; and
and the processing computer is connected with the modulation and demodulation instrument and is used for obtaining wavelength change according to the measured wavelength value and demodulating the pressure value and the temperature value measured by the pressure measurement grating and the temperature compensation grating according to the wavelength change.
In a preferred embodiment of the present application, the modem is connected to the pressure measurement grating and the temperature compensation grating through optical fibers.
Compared with the prior art, the grating pressure sensor for detecting the pipeline pressure can improve the measurement precision and the application range, and can eliminate the influence of the temperature on the grating pressure sensor, so that the pipeline pressure measurement is more accurate.
Drawings
In order to more clearly illustrate the technical solutions provided by the present application, the following briefly introduces the accompanying drawings. It is to be expressly understood that the drawings described below are only illustrative of some embodiments of the invention.
Fig. 1 is a schematic view of a grating pressure sensor of the present application.
Fig. 2 is a schematic view of a measurement system of the present application.
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the drawings in the embodiments of the present application.
As shown in fig. 1, in order to overcome the problems in the prior art, the present application provides a grating pressure sensor for detecting a pipeline pressure, where the grating pressure sensor includes a three-way cylinder 1, a pressure measurement grating 2, a temperature compensation grating 3, and a plug 4.
The three-way type cylinder 1 comprises a first cylinder 11, a second cylinder 12 and a third cylinder 13, wherein a cylinder inlet 14 is arranged at the upper end of the first cylinder 11, the cylinder inlet 14 is used for being communicated with the pipeline 6, and the second cylinder 12 and the third cylinder 13 are arranged in a collinear way and are arranged on two sides of the first cylinder 11 approximately symmetrically.
The pressure measurement grating 2 is arranged in the second cylinder 12 on the left side and the temperature compensation grating 3 is arranged in the third cylinder 12 on the right side.
The stopper 4 is used for blocking at least one of the second cylinder 12 and the third cylinder 13. In the embodiment shown in fig. 1, the plug 4 is used to plug the third cylinder 13 of the open structure when the second cylinder 12 is a blind hole and the third cylinder 13 is an open hole. When the second cylinder 12 and the third cylinder 13 are both of an open pore structure, the plug 4 is used for respectively plugging the open pore of the second cylinder 12 and the open pore of the third cylinder 13. It should be noted that, when the second cylinder 12 and the third cylinder 13 are both blind holes, the plug 4 may be omitted, but due to process limitations, the pressure measurement grating 2 and the temperature compensation grating 3 need to be disposed in the second cylinder 12 and the third cylinder 13, and measurement cables need to be led out from the pressure measurement grating 2 and the temperature compensation grating 3, so at least one opening needs to be disposed in the second cylinder 12 and the third cylinder 13 for process installation.
When the fluid in the pipeline 6 flows into the second cylinder and the third cylinder of the three-way cylinder from the cylinder inlet 14 of the three-way cylinder, the pressure measuring grating 2 and the temperature compensating grating 3 can measure the pressure and the temperature in the second cylinder 12 and the third cylinder 13, and finally the pressure in the pipeline 6 can be obtained by resolving the measured values of the pressure measuring grating 2 and the temperature compensating grating 3.
In this application, pressure measurement grating 2 and temperature compensation grating 3 are fixed the setting along three way type 1 ring direction respectively, and fixed mode can adopt the mode of bonding.
In the present application, the second cylinder 12 and the third cylinder 13 are both thin-walled cylinder structures, and the inner bores of the second cylinder 12 and the third cylinder 13 have the same diameter and different wall thicknesses. In the embodiment shown in fig. 1, the wall thickness of the third cylinder 13 with the temperature compensation grating 3 is larger than the wall thickness of the second cylinder 12 with the pressure measurement grating 2.
After the pipeline 6 is connected with the cylinder inlet 14 of the grating pressure sensor through the ferrule, the fluid in the pipeline can flow into the second cylinder 12 and the third cylinder 13 of the three-way cylinder 1 through the cylinder inlet 14 and act on the inner walls of the cylinders with different wall thicknesses. Since the wall thicknesses of the second cylinder 12 and the third cylinder 13 on the left and right sides are different, the circumferential directions of the two cylinders are largely deformed.
In the above embodiment of the present application, the third cylinder 13 with thicker wall thickness in the three-way cylinder 1 is connected with the plug 4 by means of screw threads, so as to ensure the inflow of fluid and act on the inner wall of the second/third cylinder and the surface of the plug 4.
In the present application, a seal groove is formed at a connection portion between the plug 4 and the third cylinder 13 connected to the plug 4 by a screw. And a sealing ring 5 is arranged in the sealing groove, so that fluid can be prevented from leaking out along a gap between the third cylinder 13 at the right end and the plug 4, and the sealing property of the pipeline is ensured.
In addition, in the present application, the three-way cylinder 1 is made of an elastic material including, but not limited to, beryllium bronze, aluminum, stainless steel, etc. By forming the three-way cylinder 1 from an elastic material, the thin walls of the second cylinder 12 and the third cylinder 13 can be deformed correspondingly under the condition of pressure change.
Further, the plug 4 is made of a harder material, including but not limited to beryllium copper, aluminum, stainless steel, etc.
In order to realize the measurement use of the grating pressure sensor, as shown in fig. 2, the present application also provides a measurement system, which includes the grating pressure sensor and the modem 7, and the processing computer 8. The modulation and demodulation instrument 7 is connected with the pressure measurement grating 2 and the temperature compensation grating 3 in the grating pressure sensor through the optical fiber 91, and the modulation and demodulation instrument 7 is connected with the processing computer 8 through the data cable 92, so that the whole measuring system is formed, and the pressure in the pipeline 6 can be monitored and measured in real time.
The specific operation process of the grating pressure sensor and the measurement system is as follows:
1) firstly, respectively sticking a pressure measurement grating 1 and a temperature compensation grating 2 to the middle positions of cylinders with different wall thicknesses, placing a sealing ring 5 in a sealing groove, and connecting a plug 4 with the cylinders through threads;
2) a grating pressure sensor for detecting the pressure of the pipeline is connected to the pipeline 6 through a clamping sleeve, so that the sealing property between the pressure pipeline 6 and the grating pressure sensor is ensured;
3) a pressure measurement Grating 2 and a temperature compensation Grating 3 of a Grating pressure sensor for detecting pipeline pressure are connected to a modulation and demodulation instrument 7 through optical fibers, the modulation and demodulation instrument 7 is connected to a processing computer 8, and the drift amount of the central wavelength of the pressure measurement Grating and the temperature compensation Grating (FBG) is demodulated through the processing computer 8. The pressure can be measured by calibrating and measuring the drift amount of the central wavelength of the pressure measurement grating 2 and the temperature compensation grating 3.
The grating pressure sensor provided by the application has the advantages of simple structure, light weight, small volume and easiness in use, and can realize real-time online monitoring of pressure. And the grating pressure sensor of this application pastes the grating in the hoop direction of two drums, and the left end drum design is the thin wall so that measurement pressure, and the right-hand member drum design is the thick wall so that do temperature compensation, and the drum structure in this application not only has realized the feasibility of pressure real-time measurement on the one hand, has also satisfied the high accuracy of measurement and on a large scale requirement simultaneously.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (7)
1. A grating pressure sensor for sensing line pressure, the grating pressure sensor comprising:
the three-way type cylinder comprises a first cylinder, a second cylinder and a third cylinder, wherein the second cylinder and the third cylinder are arranged in a collinear manner and are distributed on two sides of the first cylinder vertical to the second cylinder and the third cylinder;
the pressure measurement grating and the temperature compensation grating are arranged in the second cylinder and the third cylinder of the three-way type cylinder and are fixed along the circumferential direction of the second cylinder and the third cylinder of the three-way type cylinder respectively; the plug is used for plugging at least one position of the second cylinder and the third cylinder;
when the fluid in the pipeline flows into the second cylinder and the third cylinder of the three-way cylinder from the cylinder inlet of the three-way cylinder, the pressure in the pipeline can be obtained by calculating the measurement values of the pressure measurement grating and the temperature compensation grating.
2. The grating pressure sensor for detecting line pressure according to claim 1, wherein one of the second cylinder and the third cylinder, which has a thicker wall, is screw-coupled to the choke plug.
3. The grating pressure sensor for detecting pipeline pressure according to claim 2, wherein a sealing groove is circumferentially formed in an inner side of a cylinder in threaded connection with a plug, a sealing ring is arranged in the sealing groove, and the sealing ring is arranged at a connection portion of the plug and the cylinder.
4. The grating pressure sensor for sensing line pressure of claim 1 wherein the three-way cylinder is made of an elastic material comprising beryllium bronze, aluminum, stainless steel.
5. The grating pressure sensor for sensing line pressure of claim 1 wherein the plug is made of a hard material comprising beryllium bronze, aluminum, stainless steel.
6. A measurement system for detecting line pressure, the measurement system comprising:
the grating pressure sensor of any one of claims 1 to 5;
the modulation and demodulation instrument is connected with the pressure measurement grating and the temperature compensation grating and is used for analyzing the wavelength values measured by the pressure measurement grating and the temperature compensation grating; and
and the processing computer is connected with the modulation and demodulation instrument and is used for obtaining wavelength change according to the measured wavelength value and demodulating the pressure value and the temperature value measured by the pressure measurement grating and the temperature compensation grating according to the wavelength change.
7. The system of claim 6, wherein the modem is coupled to the pressure measurement grating and the temperature compensation grating via optical fibers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010836255.7A CN111964816B (en) | 2020-08-19 | 2020-08-19 | Grating pressure sensor for detecting pipeline pressure and measuring system with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010836255.7A CN111964816B (en) | 2020-08-19 | 2020-08-19 | Grating pressure sensor for detecting pipeline pressure and measuring system with same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111964816A CN111964816A (en) | 2020-11-20 |
| CN111964816B true CN111964816B (en) | 2022-04-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010836255.7A Active CN111964816B (en) | 2020-08-19 | 2020-08-19 | Grating pressure sensor for detecting pipeline pressure and measuring system with same |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201402196Y (en) * | 2009-05-12 | 2010-02-10 | 昆明理工大学 | Blind type optical fiber Bragg grating middle and low pressure sensor |
| CN202255710U (en) * | 2011-08-08 | 2012-05-30 | 武汉理工大学 | Fiber grating pressure sensor with T-shaped structure and easiness for being connected in series |
| CN203824688U (en) * | 2014-05-08 | 2014-09-10 | 贵州航天凯山石油仪器有限公司 | Grating pressure transducer for detecting oil well pressure |
| CN110243532A (en) * | 2019-04-22 | 2019-09-17 | 西安石油大学 | A kind of fiber bragg grating pressure sensor of pipe oil gas pressure monitoring |
| CN210774479U (en) * | 2019-05-10 | 2020-06-16 | 中国船舶重工集团公司第七一五研究所 | Fiber grating pressure sensor based on different wall thickness cylinder structures |
-
2020
- 2020-08-19 CN CN202010836255.7A patent/CN111964816B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201402196Y (en) * | 2009-05-12 | 2010-02-10 | 昆明理工大学 | Blind type optical fiber Bragg grating middle and low pressure sensor |
| CN202255710U (en) * | 2011-08-08 | 2012-05-30 | 武汉理工大学 | Fiber grating pressure sensor with T-shaped structure and easiness for being connected in series |
| CN203824688U (en) * | 2014-05-08 | 2014-09-10 | 贵州航天凯山石油仪器有限公司 | Grating pressure transducer for detecting oil well pressure |
| CN110243532A (en) * | 2019-04-22 | 2019-09-17 | 西安石油大学 | A kind of fiber bragg grating pressure sensor of pipe oil gas pressure monitoring |
| CN210774479U (en) * | 2019-05-10 | 2020-06-16 | 中国船舶重工集团公司第七一五研究所 | Fiber grating pressure sensor based on different wall thickness cylinder structures |
Non-Patent Citations (1)
| Title |
|---|
| 基于光纤光栅的管道压力非侵入式检测方法研究;许超宇;《中国优秀硕士学位论文全文数据库 基础科学辑》;20200715(第07期);第27、43-69页 * |
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| CN111964816A (en) | 2020-11-20 |
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