CN110243532A - A kind of fiber bragg grating pressure sensor of pipe oil gas pressure monitoring - Google Patents
A kind of fiber bragg grating pressure sensor of pipe oil gas pressure monitoring Download PDFInfo
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- CN110243532A CN110243532A CN201910323642.8A CN201910323642A CN110243532A CN 110243532 A CN110243532 A CN 110243532A CN 201910323642 A CN201910323642 A CN 201910323642A CN 110243532 A CN110243532 A CN 110243532A
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- pressure
- bragg grating
- pressure sensor
- fiber bragg
- grating
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- 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
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- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
A kind of fiber bragg grating pressure sensor of pipe oil gas pressure monitoring, including sequentially connected top cover from top to bottom, intermediate member and pressure port, pressure port is internally provided with introduction channel, introduction channel runs end and is in contact with the pressure containing disk being located inside intermediate member, top disc is provided at the top of pressure containing disk, " V " type stress transfer structure is provided in top disc, restricted two vertical support frames that it is moved horizontally are arranged in " V " type stress transfer structure two sides, pressure measuring fiber grating is provided between vertical support frame, top cover interior surface is pasted with the temperature compensation fiber grating for carrying out temperature-compensating, optical fiber fairlead is provided at top cover central upper portion, passing through in optical fiber fairlead has pressure measuring fiber grating and temperature compensation grating.The present invention eliminates the influence of temperature while measuring pressure, realizes temperature-compensating, has size small, and structure design is simple, cheap, with higher sensitivity feature.
Description
Technical field
The present invention relates to optical fiber grating sensing detection technique field, in particular to a kind of optical fiber of pipe oil gas pressure monitoring
Grating pressure sensor.
Background technique
At this stage, most of oil and gas pipeline pressure detecting is using conditional electronic class pressure transmitter, such as condenser type, pressure
Resistive, inductance type, piezoelectric resonator pressure transmitter etc..Electrical type pressure transmitter can be by gas that load cell is experienced, liquid
The physical pressures parameter such as body is transformed into the electric signal of standard, electric signal since the impedance of transmission line will appear relaxation phenomenon, and
Under the environment such as high temperature, high pressure, electromagnetic radiation, transmitter is vulnerable to interference.Electrical type pressure transmitter nonlinearity, hysteresis are missed
Difference is higher, influences measurement accuracy, will lead to its different degrees of damage with corrosivity or overheat media contact, also has production work
The disadvantages of skill is complicated, the service life is short, stability is poor.
Fiber grating is as a kind of passive device, using fiber grating as the sensing element of pressure sensor, transducing signal
Induction and transmission complete in a fiber, signal is not influenced by ambient electromagnetic field, reliable performance, and can high temperature,
The extreme environments such as inflammable, explosive and perishable use.However, since the variation of temperature and pressure will all cause in fiber grating
The long movement of cardiac wave, brings temperature, pressure cross sensitivity.Therefore, the cross sensitivity for how effectively solving temperature and pressure is asked
Topic, i.e., the influence that temperature is eliminated while measuring pressure is the key that sensors with auxiliary electrode functionization.
Summary of the invention
In order to solve the above technical problems, the purpose of the present invention is to provide a kind of optical fiber light of pipe oil gas pressure monitoring
Grid voltage force snesor eliminates the influence of temperature while measuring pressure, realizes temperature-compensating, has size small, structure design
Simply, cheap, with higher sensitivity feature.
To achieve the goals above, the technical solution adopted by the present invention is that:
A kind of fiber bragg grating pressure sensor of pipe oil gas pressure monitoring, including from top to bottom sequentially connected top cover 1,
Intermediate member 2 and pressure port 3, the pressure port 3 are internally provided with introduction channel 12, introduction channel 12 run end with
Pressure containing disk 6 inside intermediate member 2 is in contact, and top disc 14, top circle are provided at the top of the pressure containing disk 6
" V " type stress transfer structure is provided on disk 14, " V " type stress transfer structure two sides are arranged restricted its and move horizontally
Two vertical support frames 9, be provided with pressure measuring fiber grating 4 between vertical support frame 9,1 interior surface of top cover be pasted with into
The temperature compensation fiber grating 5 of trip temperature compensation, is provided with optical fiber fairlead 10 at 1 central upper portion of top cover, wears in optical fiber fairlead 10
Pressure measuring fiber grating 4 and temperature compensation grating 5 are crossed.
" V " type stress transfer structure includes the inclination truss 7 of two with horizontal plane angle at 45 °, tilts truss 7
In on the pedestal 11 on pressure containing disk 6.
11, two inclination truss 7 of pedestal of the fiber bragg grating pressure sensor and two vertical support frames 9 are integrated
Change design.
The pressure containing disk 6 uses square structure.
The top cover 1 is pie tubular construction.
The top cover 1 is connect by screw thread 8 with intermediate member 2.
2 bottom of intermediate member is connect at the top of pressure port 3 by welding 13.
Beneficial effects of the present invention:
Fiber bragg grating pressure sensor provided by the invention, can be by " V " type stress transfer structure by diaphragm transverse direction position
Transfer turns to fiber grating axial displacement, and is not necessarily to sealed package.
Fiber bragg grating pressure sensor provided by the invention, pressure containing disk use squared design, improve ambient pressure with
The linear relationship of caused membrane deflection.
Fiber bragg grating pressure sensor provided by the invention is passed to maximum stress by " V " type stress transfer structure
Fiber grating can adjust range and the sensitivity of pressure sensor by adjusting the size of pressure containing disk and vertical support frame,
To adapt to the detection requirement of different occasions.
Fiber bragg grating pressure sensor provided by the invention fixes fiber grating by the end center of vertical support frame,
The problems such as grid region directly contacts brought chirp, thermal stability difference and unbalanced stress with dielectric material is avoided, is improved
Packaging technology.
Fiber bragg grating pressure sensor provided by the invention, is designed using double optical fiber grating, and it is outer for detecting to survey press polish grid
Boundary's pressure signal, temperature compensation grating, to eliminate the interference of ambient temperature, play the work of temperature-compensating for measuring ambient temperature variation
With.
Detailed description of the invention
Fig. 1 is fiber bragg grating pressure sensor provided by the invention along the cross-sectional view with optical fiber parallel direction.
Fig. 2 is the top view of fiber bragg grating pressure sensor intermediate member 2 provided by the invention.
Fig. 3 is the cross-sectional view of the top cover 1 of fiber bragg grating pressure sensor provided by the invention.
Specific embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings.
Fiber bragg grating pressure sensor provided by the invention as shown in Figure 1:, comprising: top cover 1 is pie tubular construction,
Top inner wall surface mount has the temperature compensation grating 5 of monitoring ambient temperature variation, for drawing survey press polish grid 4 and temperature compensation grating 5
The fairlead 10 of tail optical fiber.Intermediate member 2 is that column is columnar structured, and top surface, which has, directly senses ambient pressure signal
Square pressure-bearing diaphragm 6；" V " type stress transfer structure on disk 14, the inclination purlin including two with horizontal plane angle at 45 °
Frame 7, the pedestal 11 on square pressure-bearing diaphragm 6；Two vertical support frames 9 that two inclination truss 7 move horizontally it are limited,
It is fixed on disk 14；It is installed on the survey press polish grid 4 of the detection pressure signal of two 9 end centers of vertical support frame, pressure containing disk 6
Lateral displacement fiber grating 4 is passed to by the limitation of two inclination truss 7 and two vertical support frames 9, make fiber grating 4 produce
Raw axial strain.Pressure port 3, fluid to be measured act on pressure containing disk 6 by introduction channel 12, bring it about lateral displacement.
11, two inclination truss 7 of pedestal of the fiber bragg grating pressure sensor and two vertical support frames 9 are integration
Design, to guarantee the rigid of transmission of 6 amount of deflection of pressure containing disk caused by ambient pressure.
Comprising the stress transfer structure with the two of horizontal plane angle at 45 ° inclination truss 7 and pedestal 11, stress can be maximized
Pass to fiber grating 4.
Pressure containing disk 6 uses squared design, in measurement pressure limit, has ambient pressure with 6 amount of deflection of pressure containing disk
Good linear relationship.
The fiber bragg grating pressure sensor is the thickness by changing pressure containing disk 4 and two vertical support frames 9, to adjust light
The sensitivity of fine grating pressure sensor and range.
Top cover 1 is connect by screw thread 8 with intermediate member 2.
2 bottom of intermediate member is connect at the top of pressure port 3 by welding 13, to guarantee leakproofness.
It is as shown in Figure 2: to survey press polish grid 4 and be located at two vertical support frames, 9 end center.
As shown in Figure 3: temperature compensation grating 5 is located above 1 inner wall of top cover, is used for temperature-compensating.
Working principle of the present invention is:
The working principle of fiber bragg grating pressure sensor provided by the invention is, when external fluid is made by introduction channel 12
When for square pressure-bearing diaphragm 6, deformation occurs and generates the stress for acting on " V " type stress transfer structure for pressure containing disk 6.This is answered
Power, in the pressure measuring fiber grating 4 for being fixed on two vertical support frames, 9 top, makes it generate axis by the restriction effect of two vertical support frames 9
To strain, its output wavelength is caused to change, changes to demodulate external fluid pressure by demodulated equipment Detection wavelength
Signal.The temperature compensation grating 5 on 1 top inner wall surface of top cover, for experiencing ambient temperature signal, available actual environment temperature
Degree, while playing temperature compensation function.
" V " type stress transfer structure and two vertical support frames 9 with pedestal 11 use integrated design, are welded on disk 14
On, sensor is integrally formed by same metal material processing.
Top cover 1 is connect with intermediate member 2 using screw thread 8, to protect pressure measuring fiber grating 4 and temperature compensation fiber grating 5.
Claims (8)
1. a kind of fiber bragg grating pressure sensor of pipe oil gas pressure monitoring, which is characterized in that including from top to bottom successively connecting
Top cover (1), intermediate member (2) and the pressure port (3) connect, the pressure port (3) are internally provided with introduction channel (12),
Introduction channel (12) runs the end pressure containing disk (6) internal with intermediate member (2) are located at and is in contact, the pressure containing disk
(6) top is provided with top disc (14), " V " type stress transfer structure is provided in top disc (14), described " V " type is answered
Restricted two vertical support frames (9) that it is moved horizontally are arranged in power transferring structure two sides, and survey pressure is provided between vertical support frame (9)
Fiber grating (4), the top cover (1) interior surface are pasted with the temperature compensation fiber grating (5) for carrying out temperature-compensating, top cover (1)
It is provided at central upper portion optical fiber fairlead (10), passing through in optical fiber fairlead (10) has pressure measuring fiber grating (4) and temperature compensation light
Grid (5).
2. a kind of fiber bragg grating pressure sensor of pipe oil gas pressure monitoring according to claim 1, which is characterized in that
" V " type stress transfer structure includes the inclination truss (7) of two with horizontal plane angle at 45 °, is located at square pressure-bearing diaphragm
(6) pedestal (11) on.
3. a kind of fiber bragg grating pressure sensor of pipe oil gas pressure monitoring according to claim 1, which is characterized in that
The pedestal (11) of the fiber bragg grating pressure sensor, two inclination truss (7) and two vertical support frames (9) are integration
Design.
4. a kind of fiber bragg grating pressure sensor of pipe oil gas pressure monitoring according to claim 1, which is characterized in that
The pressure containing disk (6) uses square structure.
5. a kind of fiber bragg grating pressure sensor of pipe oil gas pressure monitoring according to claim 1, which is characterized in that
The top cover (1) is pie tubular construction, and intermediate member (2) is that column is columnar structured.
6. a kind of fiber bragg grating pressure sensor of pipe oil gas pressure monitoring according to claim 1, which is characterized in that
The top cover (1) is connect by screw thread (8) with intermediate member (2).
7. a kind of fiber bragg grating pressure sensor of pipe oil gas pressure monitoring according to claim 1, which is characterized in that
Intermediate member (2) bottom is connect at the top of pressure port (3) by welding (13).
8. a kind of fiber bragg grating pressure sensor of pipe oil gas pressure monitoring according to claim 1, which is characterized in that
Further include temperature compensation grating (5), is fixed on top cover (1) top inner wall surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910323642.8A CN110243532A (en) | 2019-04-22 | 2019-04-22 | A kind of fiber bragg grating pressure sensor of pipe oil gas pressure monitoring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910323642.8A CN110243532A (en) | 2019-04-22 | 2019-04-22 | A kind of fiber bragg grating pressure sensor of pipe oil gas pressure monitoring |
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| Publication Number | Publication Date |
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| CN110243532A true CN110243532A (en) | 2019-09-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910323642.8A Pending CN110243532A (en) | 2019-04-22 | 2019-04-22 | A kind of fiber bragg grating pressure sensor of pipe oil gas pressure monitoring |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110702280A (en) * | 2019-10-18 | 2020-01-17 | 西安石油大学 | High-sensitivity fiber grating pressure sensor based on square diaphragm |
| CN111964816A (en) * | 2020-08-19 | 2020-11-20 | 中国航空工业集团公司沈阳飞机设计研究所 | Grating pressure sensor for detecting pipeline pressure and measuring system with same |
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| CN102901593A (en) * | 2012-11-01 | 2013-01-30 | 中国科学院半导体研究所 | Fiber Bragg grating soil pressure sensor based on two L-type beams |
| CN103017972A (en) * | 2012-11-26 | 2013-04-03 | 山东大学 | Bragg grating pressure cell and test method based on lever principle |
| US20140096617A1 (en) * | 2012-10-10 | 2014-04-10 | Brent Cummings | Apparatus for Measuring Failure Load of Model Truss Structures |
| CN105229438A (en) * | 2013-05-10 | 2016-01-06 | 株式会社村田制作所 | The pressure transducer improved |
| CN205373933U (en) * | 2016-01-06 | 2016-07-06 | 中国石油天然气股份有限公司 | Fiber bragg grating pressure sensor |
| CN108534942A (en) * | 2018-03-28 | 2018-09-14 | 西南交通大学 | A kind of minute-pressure resistive sensor vibration and temperature interference compensation model and system |
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2019
- 2019-04-22 CN CN201910323642.8A patent/CN110243532A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140096617A1 (en) * | 2012-10-10 | 2014-04-10 | Brent Cummings | Apparatus for Measuring Failure Load of Model Truss Structures |
| CN102901593A (en) * | 2012-11-01 | 2013-01-30 | 中国科学院半导体研究所 | Fiber Bragg grating soil pressure sensor based on two L-type beams |
| CN103017972A (en) * | 2012-11-26 | 2013-04-03 | 山东大学 | Bragg grating pressure cell and test method based on lever principle |
| CN105229438A (en) * | 2013-05-10 | 2016-01-06 | 株式会社村田制作所 | The pressure transducer improved |
| CN205373933U (en) * | 2016-01-06 | 2016-07-06 | 中国石油天然气股份有限公司 | Fiber bragg grating pressure sensor |
| CN108534942A (en) * | 2018-03-28 | 2018-09-14 | 西南交通大学 | A kind of minute-pressure resistive sensor vibration and temperature interference compensation model and system |
Non-Patent Citations (1)
| Title |
|---|
| 包宏权: "压力传感器结构设计和优化分析", 《中国优秀硕士学位论文全文数据库(信息科技辑)》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110702280A (en) * | 2019-10-18 | 2020-01-17 | 西安石油大学 | High-sensitivity fiber grating pressure sensor based on square diaphragm |
| CN111964816A (en) * | 2020-08-19 | 2020-11-20 | 中国航空工业集团公司沈阳飞机设计研究所 | Grating pressure sensor for detecting pipeline pressure and measuring system with same |
| CN111964816B (en) * | 2020-08-19 | 2022-04-01 | 中国航空工业集团公司沈阳飞机设计研究所 | Grating pressure sensor for detecting pipeline pressure and measuring system with same |
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Application publication date: 20190917 |