CN103542974A - Optical fiber Bragg optical grating piston-type rhombus osmotic pressure sensor and use method thereof - Google Patents
Optical fiber Bragg optical grating piston-type rhombus osmotic pressure sensor and use method thereof Download PDFInfo
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Abstract
The invention relates to an optical fiber Bragg optical grating piston-type rhombus osmotic pressure sensor and a use method thereof, and belongs to the technical field of photoelectron measurement components. The sensor comprises a pressure inlet, a pressure-bearing piston, an upper supporting frame, a pressure guide rod, a rhombus pressure transmitting structure, an upper elastic steel piece, a lower elastic steel piece, a warming optical fiber Bragg optical grating, a lower supporting frame, optical fiber Bragg optical gratings, lead-out optical fibers and lead-out holes. The upper supporting frame and the lower supporting frame are welded to a shell, the middle of the upper supporting frame is connected with the pressure-bearing piston, the bottom of the pressure-bearing piston is connected with one end of the pressure guide rod, the other end of the pressure guide rod is connected with the upper end of the rhombus pressure transmitting structure, the upper elastic steel piece and the lower elastic steel piece are symmetrically fixed to the upper half portion and the lower half portion of the rhombus pressure transmitting structure respectively, one end of the warming optical fiber Bragg optical grating is connected with the upper supporting frame, the lower supporting frame is connected with the lower end of the rhombus pressure transmitting structure, the optical gratings are attached to the upper elastic steel piece and the lower elastic steel piece in an adhesive mode, and the lead-out optical fibers of the optical gratings are led out from the lead-out holes. Real-time on-line monitoring of measured osmotic pressure is achieved.
Description
Technical field
The present invention relates to a kind of optical fiber Bragg optical grating piston-type rhombus osmotic pressure sensor and its application method, belong to technical field of photoelectron measurement components.
Background technology
Due to the extension and the same expansion of exploitation model of mining depth, shaft production develops in depth, flood threatens increasingly serious, prevent and treat task more arduous, mine water disaster seriously threatens Safety of Coal Mine Production and the life security of mine, and the prediction and study on prevention to coal mine flood have been raised to increasingly consequence.The pressure of artesian water is research and the prediction most important parameter of gushing water problem, so being the important evidence of prediction water inrush accident to its real-time monitoring.Electric class sensing technology is at present using more in Mine Geological Hazard monitoring, particularly important effect is played, but it is due to that electrical sensor is active device, poor waterproof properties, performance steady in a long-term and corrosion resistance are poor, the validity, stability and confidence level of monitoring information have been had a strong impact under underground engineering complex environment using phenomenons such as fragile or generation drifts for a long time.Fibre optical sensor has the advantages that strong electromagnetism interference, water resistance, wide dynamic range, sensitivity is high, be easy to networking, distributed measurement can be achieved, to realize that mine disaster monitoring and prediction provide feasible approach.
The content of the invention
The invention provides a kind of optical fiber Bragg optical grating piston-type rhombus osmotic pressure sensor and its application method, for solving the problems, such as the real time on-line monitoring to osmotic pressure.
The technical scheme is that：A kind of optical fiber Bragg optical grating piston-type rhombus osmotic pressure sensor, including enter to press mouth 1, pressure-bearing piston 2, upper support frame 3, pressure guide rod 4, rhombus pressure transmission structure 5, upper elastic steel sheet 6, lower elastic steel sheet 7, temperature compensation optical fiber Bragg raster 8, lower bracing frame 9, optical fiber Bragg raster 10, export optical fiber 11, fairlead 12；Wherein enter to press mouth 1 to be distributed in pressure transmission storehouse, upper support frame 3, lower bracing frame 9 is welded on shell, connection pressure-bearing piston 2 in the middle of upper support frame 3, the bottom of pressure-bearing piston 2 connects one end of pressure guide rod 4, the other end of pressure guide rod 4 is connected with the upper end of rhombus pressure transmission structure 5, upper elastic steel sheet 6, lower elastic steel sheet 7 is symmetrically fixed on the first half and the lower half of rhombus pressure transmission structure 5, one end of temperature compensation optical fiber Bragg raster 8 is connected with upper support frame 3, lower bracing frame 9 is connected with the lower end of rhombus pressure transmission structure 5, optical fiber Bragg raster 10 is pasted onto elastic steel sheet 6, on lower elastic steel sheet 7, temperature compensation optical fiber Bragg raster 8, the export optical fiber 11 of optical fiber Bragg raster 10 positioned at the fairlead 12 of lower bracing frame 9 by drawing and being connected with external optical cable.
The fairlead 12 is sealed using epoxy resin.
A kind of application method of optical fiber Bragg optical grating piston-type rhombus osmotic pressure sensor, analyzes the shift value for obtaining the centre wavelength of optical fiber Bragg raster 10 according to optical fiber Bragg raster (FBG) demodulator first
, then pass through the shift value of the centre wavelength of optical fiber Bragg raster 10With the osmotic pressure of environmentPRelational expression
Calculate the osmotic pressure of test environment；In formula：
The angle of upper left bar and vertical direction for rhombus pressure transmission structure 5,L 1、L 2RespectivelyF 1、F 2Torque；F 1To be applied to the power of the left horizontal left direction of connecting node of rhombus pressure transmission structure 5,F 2It is elastic steel sheet to the reaction pulling force of rhombus pressure transmission structure 5,SFor the area of pressure-bearing piston 2,EFor the elastic modelling quantity of elastic steel sheet,S 2For the cross-sectional area of elastic steel sheet,
For the strain sensitive coefficient of optical fiber Bragg raster 10,
For the centre wavelength of optical fiber Bragg raster 10.
The angle
Excursion be 5 ° to 50 °.
The present invention operation principle be：
Osmotic pressure in Pressure chamber is passed to rhombus pressure transmission structure 5 by pressure-bearing piston 2 by pressure guide rod 4, rhombus pressure transmission structure 5 pulls the two ends of elastic steel sheet, the Bragg gratings 10 being pasted onto on elastic steel sheet are driven to stretch, the detection of test environment osmotic pressure is converted into the modulation to optical fiber Bragg raster wavelength, measurement symmetrical above and below is favorably improved measurement accuracy, and the relaxation temperature compensation optical fiber Bragg raster 8 being connected with upper support frame is used for temperature-compensating；Temperature compensation optical fiber Bragg raster 8, the export optical fiber 11 of optical fiber Bragg raster 10 are connected by the fairlead 12 positioned at lower bracing frame 9 with external optical cable, fairlead 12 is sealed using epoxy resin, optical fiber Bragg optical grating piston-type rhombus osmotic pressure sensor is constituted.
The mathematics model analysis of the present invention is as follows：
The power that pressure transmission bar passes to rhombus pressure transmission structure isF, the stress equation of rhombus pressure transmission structure is：
In formula：
To be applied to the power of the left horizontal left direction of connecting node of rhombus pressure transmission structure 5,
The angle of upper left bar and vertical direction for rhombus pressure transmission structure 5.
Using torque equilibrium equation of the connecting node as fulcrum in rhombus pressure transmission structure 5：
F 1 L 1= F 2 L 2 （2）
In formula：F 2It is elastic steel sheet to the reaction pulling force of rhombus pressure transmission structure 5,L 1、L 2RespectivelyF 1、F 2Torque,（1）Formula is brought into（2）Formula is obtained：
The osmotic pressure is made to beP, piston area isSThen：
Will（4）Bring into（3）：
Rhombus pressure transmission structure 5 is to the pulling force of elastic steel sheetF’ 2,F’ 2WithF 2It is a pair of active forces and reaction force：
F’ 2= F 2 （6）
The elastic modelling quantity of elastic steel sheet isE, cross-sectional area is
, length isl, deflection is △l：
Will（5）、（6）Formula is brought into（7）Formula is obtained：
The transverse strain of elastic steel sheet is：
Will（9）Formula is brought into（8）Formula is obtained：
（10）
The optical fiber Bragg raster 10 being pasted onto on elastic steel sheet stretches with elastic steel sheet, if temperature change Δ in measurement processT, then the wavelength-shift amount with optical fiber Bragg raster caused by temperature is strained
For：
In formula：
For strain sensitive coefficient；
For temperature-sensitivity coefficient；
For transverse strain variable quantity；ΔTFor temperature variation；
For the centre wavelength of optical fiber Bragg raster 10.Δ is determined by temperature compensation gratingT, in formula（11）The middle influence for eliminating temperature, can be obtained：
Will（12）、（9）Formula is brought into（8）Formula is obtained：
Formula（13）Indicate test environment osmotic pressurePWith optical fiber Bragg raster wavelength-shift
Between Mathematical Modeling, can just calculate the osmotic pressure of test environment by measuring optical fiber Bragg raster wavelength-shift.
The beneficial effects of the invention are as follows：
1st, the pressure for passing to rhombus pressure transmission structure by pressure-bearing piston and pressure guide rod is converted into the Bragg grating stretching actions to being pasted onto on elastic steel sheet, and the osmotic pressure of optical fiber Bragg raster wavelength-shift and test environment has linear relationship.
2nd, adjustment rhombus pressure transmission structural top angle and the welding position of elastic steel sheet and the cross-sectional area of pressure-bearing piston can all change the measurement sensitivity of sensor.
3rd, this osmotic pressure sensor is applicable to the inflammable and explosive osmotic pressure detection waited in high-risk environment in itself without any electric signal.
4th, by using optical fiber Bragg raster, with stronger anti-electromagnetic interference capability and corrosion resistance；
5th, it is simple in construction, it is easy to operation.
Brief description of the drawings
Fig. 1 is structural representation of the invention；
Fig. 2 is the partial schematic diagram of rhombus pressure transmission structure in the present invention；
Each label in figure：1 be into press mouth, 2 be pressure-bearing piston, 3 be upper support frame, 4 be pressure guide rod, 5 be rhombus pressure transmission structure, 6 be upper elastic steel sheet, 7 be lower elastic steel sheet, 8 be temperature compensation optical fiber Bragg raster, 9 be lower bracing frame, 10 be optical fiber Bragg raster, 11 be export optical fiber, 12 be fairlead.
Embodiment
Embodiment 1：As shown in Figure 1-2, a kind of optical fiber Bragg optical grating piston-type rhombus osmotic pressure sensor, including enter to press mouth 1, pressure-bearing piston 2, upper support frame 3, pressure guide rod 4, rhombus pressure transmission structure 5, upper elastic steel sheet 6, lower elastic steel sheet 7, temperature compensation optical fiber Bragg raster 8, lower bracing frame 9, optical fiber Bragg raster 10, export optical fiber 11, fairlead 12；Wherein enter to press mouth 1 to be distributed in pressure transmission storehouse, upper support frame 3, lower bracing frame 9 is welded on shell, connection pressure-bearing piston 2 in the middle of upper support frame 3, the bottom of pressure-bearing piston 2 connects one end of pressure guide rod 4, the other end of pressure guide rod 4 is connected with the upper end of rhombus pressure transmission structure 5, upper elastic steel sheet 6, lower elastic steel sheet 7 is symmetrically fixed on the first half and the lower half of rhombus pressure transmission structure 5, one end of temperature compensation optical fiber Bragg raster 8 is connected with upper support frame 3, lower bracing frame 9 is connected with the lower end of rhombus pressure transmission structure 5, optical fiber Bragg raster 10 is pasted onto elastic steel sheet 6, on lower elastic steel sheet 7, temperature compensation optical fiber Bragg raster 8, the export optical fiber 11 of optical fiber Bragg raster 10 positioned at the fairlead 12 of lower bracing frame 9 by drawing and being connected with external optical cable.
The fairlead 12 is sealed using epoxy resin.
A kind of application method of optical fiber Bragg optical grating piston-type rhombus osmotic pressure sensor, analyzes the shift value for obtaining the centre wavelength of optical fiber Bragg raster 10 according to optical fiber Bragg raster (FBG) demodulator first, then pass through the shift value of the centre wavelength of optical fiber Bragg raster 10
With the osmotic pressure of environmentPRelational expression
Calculate the osmotic pressure of test environment；In formula：
The angle of upper left bar and vertical direction for rhombus pressure transmission structure 5,L 1、L 2RespectivelyF 1、F 2Torque；F 1To be applied to the power of the left horizontal left direction of connecting node of rhombus pressure transmission structure 5,F 2It is elastic steel sheet to the reaction pulling force of rhombus pressure transmission structure 5,SFor the area of pressure-bearing piston 2,EFor the elastic modelling quantity of elastic steel sheet,S 2For the cross-sectional area of elastic steel sheet,
For the strain sensitive coefficient of optical fiber Bragg raster 10,
For the centre wavelength of optical fiber Bragg raster 10.
The angle
Excursion be 5 ° to 50 °.
Embodiment 2：As shown in Figure 1-2, a kind of optical fiber Bragg optical grating piston-type rhombus osmotic pressure sensor, including enter to press mouth 1, pressure-bearing piston 2, upper support frame 3, pressure guide rod 4, rhombus pressure transmission structure 5, upper elastic steel sheet 6, lower elastic steel sheet 7, temperature compensation optical fiber Bragg raster 8, lower bracing frame 9, optical fiber Bragg raster 10, export optical fiber 11, fairlead 12；Wherein enter to press mouth 1 to be distributed in pressure transmission storehouse, upper support frame 3, lower bracing frame 9 is welded on shell, connection pressure-bearing piston 2 in the middle of upper support frame 3, the bottom of pressure-bearing piston 2 connects one end of pressure guide rod 4, the other end of pressure guide rod 4 is connected with the upper end of rhombus pressure transmission structure 5, upper elastic steel sheet 6, lower elastic steel sheet 7 is symmetrically fixed on the first half and the lower half of rhombus pressure transmission structure 5, one end of temperature compensation optical fiber Bragg raster 8 is connected with upper support frame 3, lower bracing frame 9 is connected with the lower end of rhombus pressure transmission structure 5, optical fiber Bragg raster 10 is pasted onto elastic steel sheet 6, on lower elastic steel sheet 7, temperature compensation optical fiber Bragg raster 8, the export optical fiber 11 of optical fiber Bragg raster 10 positioned at the fairlead 12 of lower bracing frame 9 by drawing and being connected with external optical cable.
The fairlead 12 is sealed using epoxy resin.
A kind of application method of optical fiber Bragg optical grating piston-type rhombus osmotic pressure sensor, analyzes the shift value for obtaining the centre wavelength of optical fiber Bragg raster 10 according to optical fiber Bragg raster (FBG) demodulator first
, then pass through the shift value of the centre wavelength of optical fiber Bragg raster 10
With the osmotic pressure of environmentPRelational expression
Calculate the osmotic pressure of test environment；Its design parameter is：
1st, the dimensional parameters of pressure-bearing piston are：A length of 20mm, a width of 10mm, area 20*10 mm2；
2nd, the top angle of rhombus pressure transmission structure is 10 °（I.e. 2
=10°）,L 1For 40mm,L 2For 20mm；
3rd, elastic steel sheet parameter is：Young ' the s modulus of 45# steel isE=200GPa, cross-sectional areaS 2For 2*1 mm2；
4th, the technical parameter of optical fiber Bragg raster is：Centre wavelength
=1550 nm, strain sensitive coefficient
, temperature-sensitivity coefficient
℃-1；
5th, configure and test by accompanying drawing 1；
6th, the Bragg wavelength of optical fiber Bragg raster is obtained with fiber Bragg grating (FBG) demodulator；
7th, according to formula（13）, the Bragg wavelength-shifts of optical fiber Bragg raster
To the response sensitivity of osmotic pressure：
Each known quantity is substituted into above formula, theoretical calculation shows, when the top angle of rhombus pressure transmission structure takes 10 degree, the sensitivity of the osmotic pressure sensor is 52.88 pm/MPa；When the wavelength discrimination of optical fiber Bragg raster (FBG) demodulator is 1 pm（Refer to
When often changing 1 pm）, the osmotic pressure resolving power of the sensor is 18.9 KPa.
Embodiment 3：As shown in Figure 1-2, a kind of optical fiber Bragg optical grating piston-type rhombus osmotic pressure sensor, including enter to press mouth 1, pressure-bearing piston 2, upper support frame 3, pressure guide rod 4, rhombus pressure transmission structure 5, upper elastic steel sheet 6, lower elastic steel sheet 7, temperature compensation optical fiber Bragg raster 8, lower bracing frame 9, optical fiber Bragg raster 10, export optical fiber 11, fairlead 12；Wherein enter to press mouth 1 to be distributed in pressure transmission storehouse, upper support frame 3, lower bracing frame 9 is welded on shell, connection pressure-bearing piston 2 in the middle of upper support frame 3, the bottom of pressure-bearing piston 2 connects one end of pressure guide rod 4, the other end of pressure guide rod 4 is connected with the upper end of rhombus pressure transmission structure 5, upper elastic steel sheet 6, lower elastic steel sheet 7 is symmetrically fixed on the first half and the lower half of rhombus pressure transmission structure 5, one end of temperature compensation optical fiber Bragg raster 8 is connected with upper support frame 3, lower bracing frame 9 is connected with the lower end of rhombus pressure transmission structure 5, optical fiber Bragg raster 10 is pasted onto elastic steel sheet 6, on lower elastic steel sheet 7, temperature compensation optical fiber Bragg raster 8, the export optical fiber 11 of optical fiber Bragg raster 10 positioned at the fairlead 12 of lower bracing frame 9 by drawing and being connected with external optical cable.
The fairlead 12 is sealed using epoxy resin.
A kind of application method of optical fiber Bragg optical grating piston-type rhombus osmotic pressure sensor, analyzes the shift value for obtaining the centre wavelength of optical fiber Bragg raster 10 according to optical fiber Bragg raster (FBG) demodulator first
, then pass through the shift value of the centre wavelength of optical fiber Bragg raster 10
With the osmotic pressure of environmentPRelational expression
Calculate the osmotic pressure of test environment；Its design parameter is：
1st, the dimensional parameters of pressure-bearing piston are：A length of 20mm, a width of 10 mm, area 20*10 mm2；
2nd, the top angle of rhombus pressure transmission structure is 45 °（I.e. 2=45°）,L 1For 40mm,L 2For 20 mm；
3rd, elastic steel sheet parameter is：Young ' the s modulus of 45# steel isE=200GPa, cross-sectional areaS 2For 2*1 mm2；
4th, the technical parameter of optical fiber Bragg raster is：Centre wavelength=1550 nm, strain sensitive coefficient
, temperature-sensitivity coefficient
℃-1；
5th, configure and test by accompanying drawing 1；
6th, the Bragg wavelength of optical fiber Bragg raster is obtained with fiber Bragg grating (FBG) demodulator；
7th, according to formula（13）, the Bragg wavelength-shifts of optical fiber Bragg raster
To the response sensitivity of osmotic pressure：
Each known quantity is substituted into above formula, theoretical calculation shows, when the top angle of rhombus pressure transmission structure takes 45 degree, the sensitivity of the osmotic pressure sensor is 250.4 pm/MPa；When the wavelength discrimination of optical fiber Bragg raster (FBG) demodulator is 1 pm, the osmotic pressure resolving power of the sensor is 3.99 KPa.
Embodiment 4：As shown in Figure 1-2, a kind of optical fiber Bragg optical grating piston-type rhombus osmotic pressure sensor, including enter to press mouth 1, pressure-bearing piston 2, upper support frame 3, pressure guide rod 4, rhombus pressure transmission structure 5, upper elastic steel sheet 6, lower elastic steel sheet 7, temperature compensation optical fiber Bragg raster 8, lower bracing frame 9, optical fiber Bragg raster 10, export optical fiber 11, fairlead 12；Wherein enter to press mouth 1 to be distributed in pressure transmission storehouse, upper support frame 3, lower bracing frame 9 is welded on shell, connection pressure-bearing piston 2 in the middle of upper support frame 3, the bottom of pressure-bearing piston 2 connects one end of pressure guide rod 4, the other end of pressure guide rod 4 is connected with the upper end of rhombus pressure transmission structure 5, upper elastic steel sheet 6, lower elastic steel sheet 7 is symmetrically fixed on the first half and the lower half of rhombus pressure transmission structure 5, one end of temperature compensation optical fiber Bragg raster 8 is connected with upper support frame 3, lower bracing frame 9 is connected with the lower end of rhombus pressure transmission structure 5, optical fiber Bragg raster 10 is pasted onto elastic steel sheet 6, on lower elastic steel sheet 7, temperature compensation optical fiber Bragg raster 8, the export optical fiber 11 of optical fiber Bragg raster 10 positioned at the fairlead 12 of lower bracing frame 9 by drawing and being connected with external optical cable.
The fairlead 12 is sealed using epoxy resin.
A kind of application method of optical fiber Bragg optical grating piston-type rhombus osmotic pressure sensor, analyzes the shift value for obtaining the centre wavelength of optical fiber Bragg raster 10 according to optical fiber Bragg raster (FBG) demodulator first
, then pass through the shift value of the centre wavelength of optical fiber Bragg raster 10
With the osmotic pressure of environmentPRelational expression
Calculate the osmotic pressure of test environment；Its design parameter is：
1st, the dimensional parameters of pressure-bearing piston are：A length of 20mm, a width of 10 mm, area 20*10 mm2；
2nd, the top angle of rhombus pressure transmission structure is 100 °（I.e. 2
=100°）,L 1For 40mm,L 2For 20 mm；
3rd, elastic steel sheet parameter is：Young ' the s modulus of 45# steel isE=200GPa, cross-sectional areaS 2For 2*1 mm2；
4th, the technical parameter of optical fiber Bragg raster is：Centre wavelength
=1550 nm, strain sensitive coefficient
, temperature-sensitivity coefficient
℃-1；
5th, configure and test by accompanying drawing 1；
6th, the Bragg wavelength of optical fiber Bragg raster is obtained with fiber Bragg grating (FBG) demodulator；
7th, according to formula（13）, the Bragg wavelength-shifts of optical fiber Bragg raster
To the response sensitivity of osmotic pressure：
Each known quantity is substituted into above formula, theoretical calculation shows, when the top angle of rhombus pressure transmission structure takes 100 degree, the sensitivity of the osmotic pressure sensor is 720.42 pm/MPa；When the wavelength discrimination of optical fiber Bragg raster (FBG) demodulator is 1 pm, the osmotic pressure resolving power of the sensor is 1.39 KPa.
The embodiment of the present invention is explained in detail above in conjunction with accompanying drawing, but the present invention is not limited to above-mentioned embodiment,, can also various changes can be made on the premise of present inventive concept is not departed from the knowledge that those of ordinary skill in the art possess.
Claims (4)
1. a kind of optical fiber Bragg optical grating piston-type rhombus osmotic pressure sensor, it is characterised in that：Including entering to press mouth（1）, pressure-bearing piston（2）, upper support frame（3）, pressure guide rod（4）, rhombus pressure transmission structure（5）, upper elastic steel sheet（6）, lower elastic steel sheet（7）, temperature compensation optical fiber Bragg raster（8）, lower bracing frame（9）, optical fiber Bragg raster（10）, export optical fiber（11）, fairlead（12）；Wherein enter to press mouth（1）It is distributed in pressure transmission storehouse, upper support frame（3）, lower bracing frame（9）It is welded on shell, upper support frame（3）In the middle of connection pressure-bearing piston（2）, pressure-bearing piston（2）Bottom connection pressure guide rod（4）One end, pressure guide rod（4）The other end and rhombus pressure transmission structure（5）Upper end be connected, upper elastic steel sheet（6）, lower elastic steel sheet（7）Symmetrically it is fixed on rhombus pressure transmission structure（5）The first half and lower half, temperature compensation optical fiber Bragg raster（8）One end and upper support frame（3）It is connected, lower bracing frame（9）With rhombus pressure transmission structure（5）Lower end be connected, optical fiber Bragg raster（10）It is pasted onto elastic steel sheet（6）, lower elastic steel sheet（7）On, temperature compensation optical fiber Bragg raster（8）, optical fiber Bragg raster（10）Export optical fiber（11）By positioned at lower bracing frame（9）Fairlead（12）Draw and be connected with external optical cable.
2. optical fiber Bragg optical grating piston-type rhombus osmotic pressure sensor according to claim 1, it is characterised in that：The fairlead（12）Sealed using epoxy resin.
3. a kind of application method of optical fiber Bragg optical grating piston-type rhombus osmotic pressure sensor, it is characterised in that：Optical fiber Bragg raster is obtained according to the analysis of optical fiber Bragg raster (FBG) demodulator first（10）The shift value of centre wavelength
, then pass through optical fiber Bragg raster（10）The shift value of centre wavelength
With the osmotic pressure of environmentPRelational expression
Calculate the osmotic pressure of test environment；In formula：
For rhombus pressure transmission structure（5）Upper left bar and vertical direction angle,L 1、L 2RespectivelyF 1、F 2Torque；F 1To be applied to rhombus pressure transmission structure（5）The power of the left horizontal left direction of connecting node,F 2It is elastic steel sheet to rhombus pressure transmission structure（5）Reaction pulling force,SFor pressure-bearing piston（2）Area,EFor the elastic modelling quantity of elastic steel sheet,S 2For the cross-sectional area of elastic steel sheet,
For optical fiber Bragg raster（10）Strain sensitive coefficient,
For optical fiber Bragg raster（10）Centre wavelength.
4. the application method of optical fiber Bragg optical grating piston-type rhombus osmotic pressure sensor according to claim 3, it is characterised in that：The angle
Excursion be 5 ° to 50 °.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104279986A (en) * | 2014-09-18 | 2015-01-14 | 昆明理工大学 | Piston type hydrargyrum optical fiber Bragg grating tilt angle sensor and using method thereof |
| CN107884114A (en) * | 2017-11-07 | 2018-04-06 | 中国石油大学(华东) | Non-invasive pipeline pressure testing agency based on fiber grating |
| CN108663111A (en) * | 2018-04-28 | 2018-10-16 | 武汉理工大学 | The optical fibre grating acceleration sensor and measurement method of diaphragm and diamond structure |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040182166A1 (en) * | 2003-03-21 | 2004-09-23 | Jones Richard Todd | Optical differential pressure transducer utilizing a bellows and flexure system |
| CN2938032Y (en) * | 2006-06-26 | 2007-08-22 | 哈尔滨工业大学 | Fibre-optical raster osmometer |
| CN201016745Y (en) * | 2006-12-21 | 2008-02-06 | 北京品傲光电科技有限公司 | Optical fibre grating osmometer |
| CN101625273A (en) * | 2009-08-05 | 2010-01-13 | 山东大学 | Fiber bragg grating osmometer |
| CN102162757A (en) * | 2010-12-02 | 2011-08-24 | 山东科技大学 | Fiber grating earth pressure sensor |
| CN203519239U (en) * | 2013-10-24 | 2014-04-02 | 昆明理工大学 | Piston type diamond structure fiber Bragg grating seepage pressure sensor |
-
2013
- 2013-10-24 CN CN201310505798.0A patent/CN103542974B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040182166A1 (en) * | 2003-03-21 | 2004-09-23 | Jones Richard Todd | Optical differential pressure transducer utilizing a bellows and flexure system |
| CN2938032Y (en) * | 2006-06-26 | 2007-08-22 | 哈尔滨工业大学 | Fibre-optical raster osmometer |
| CN201016745Y (en) * | 2006-12-21 | 2008-02-06 | 北京品傲光电科技有限公司 | Optical fibre grating osmometer |
| CN101625273A (en) * | 2009-08-05 | 2010-01-13 | 山东大学 | Fiber bragg grating osmometer |
| CN102162757A (en) * | 2010-12-02 | 2011-08-24 | 山东科技大学 | Fiber grating earth pressure sensor |
| CN203519239U (en) * | 2013-10-24 | 2014-04-02 | 昆明理工大学 | Piston type diamond structure fiber Bragg grating seepage pressure sensor |
Non-Patent Citations (1)
| Title |
|---|
| 杨晶: "光纤式SF_6气体密度监测技术研究应用", 《中国优秀硕士学位论文全文数据库信息科技辑》, no. 03, 15 March 2013 (2013-03-15) * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104279986A (en) * | 2014-09-18 | 2015-01-14 | 昆明理工大学 | Piston type hydrargyrum optical fiber Bragg grating tilt angle sensor and using method thereof |
| CN104279986B (en) * | 2014-09-18 | 2017-04-12 | 昆明理工大学 | Piston type hydrargyrum optical fiber Bragg grating tilt angle sensor and using method thereof |
| CN107884114A (en) * | 2017-11-07 | 2018-04-06 | 中国石油大学(华东) | Non-invasive pipeline pressure testing agency based on fiber grating |
| CN107884114B (en) * | 2017-11-07 | 2020-08-28 | 中国石油大学(华东) | Non-invasive pipeline pressure detection mechanism based on fiber bragg grating |
| CN108663111A (en) * | 2018-04-28 | 2018-10-16 | 武汉理工大学 | The optical fibre grating acceleration sensor and measurement method of diaphragm and diamond structure |
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