CN204831682U - Measure cantilever beam type optic fibre bragg grating sensor of defeated oil pipe oil pressure - Google Patents
Measure cantilever beam type optic fibre bragg grating sensor of defeated oil pipe oil pressure Download PDFInfo
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- CN204831682U CN204831682U CN201520268369.0U CN201520268369U CN204831682U CN 204831682 U CN204831682 U CN 204831682U CN 201520268369 U CN201520268369 U CN 201520268369U CN 204831682 U CN204831682 U CN 204831682U
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- 239000000835 fiber Substances 0.000 title abstract description 7
- 238000005259 measurement Methods 0.000 claims abstract description 11
- 239000013307 optical fiber Substances 0.000 claims description 95
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 31
- 239000003208 petroleum Substances 0.000 claims description 26
- 229910052742 iron Inorganic materials 0.000 claims description 16
- 239000003292 glue Substances 0.000 claims description 10
- 230000003287 optical effect Effects 0.000 claims description 5
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 abstract description 2
- 230000007797 corrosion Effects 0.000 abstract description 2
- 239000002360 explosive Substances 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 abstract description 2
- 238000009434 installation Methods 0.000 abstract 1
- 230000035945 sensitivity Effects 0.000 abstract 1
- 238000009795 derivation Methods 0.000 description 5
- 230000003321 amplification Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 238000013178 mathematical model Methods 0.000 description 2
- 241001274660 Modulus Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Force Measurement Appropriate To Specific Purposes (AREA)
- Measuring Fluid Pressure (AREA)
- Optical Transform (AREA)
Abstract
The utility model relates to a measure cantilever beam type optic fibre bragg grating sensor of defeated oil pipe oil pressure belongs to photoelectronic measuring element technical field. The utility model discloses utilize the oil pressure in the defeated oil pipe to change drive piston motion, the removal of piston makes the cantilever beam warp, paste the deformation that differential type optic fibre bragg grating detected the cantilever beam on the cantilever beam, and then the accurate measurement goes out oil transportation pressure. The utility model discloses there is following benefit: the utility model discloses can be as required, through the measuring sensitivity who changes guide arm and the contact position adjustment sensor of cantilever beam, the utility model discloses any signal of telecommunication is not taken to sensor itself, and the especially adapted liquid that is arranged in high -risk environment such as inflammable and explosive detects, adoption optic fibre bragg grating makes the sensor have stronger anti -electromagnetic interference ability and corrosion -resistant ability as the measurement element of sensor, the utility model discloses simple structure, the installation of being convenient for.
Description
Technical field
The utility model relates to photoelectron measuring element technical field, relates to a kind of beam type optical fiber Bragg grating sensor measuring petroleum pipeline oil pressure specifically.
Background technology
Petroleum pipeline is the visual plant of transporting oil, in petroleum pipeline oil pressure accurate measurement to the movement capacity of petroleum pipeline and security implication very large.But domestic many measurement petroleum pipeline oil pressure sensors are the sensors adopting resistance-type, the easy like this measuring system that causes produces electrostatic, produce ionizing event even under certain conditions, cause electric discharge and produce spark, and in signal amplification process, be easily subject to the impact of the factor such as neighbourhood noise and electromagnetic interference (EMI), be therefore unfavorable for being generalized in the detection of petroleum pipeline oil pressure.
The utility model utilizes the oil pressure in petroleum pipeline to drive piston movement, the mobile of piston drives semi-girder distortion, paste the distortion that differential optical fiber Bragg grating is used for detecting semi-girder on a cantilever beam, and then accurately measure fuel transfer pressure, solve resistance sensor and easily produce electrostatic, in signal amplification process, be easily subject to the problem of the factor such as neighbourhood noise and electromagnetic interference (EMI) impact.
Summary of the invention
The technical problems to be solved in the utility model easily produces electrostatic for the resistance sensor of existing measurement petroleum pipeline oil pressure, easily be subject to the problem of the factor such as neighbourhood noise and electromagnetic interference (EMI) impact in signal amplification process, a kind of electromagnetism interference, essential safety, wide dynamic range, highly sensitive, the beam type optical fiber Bragg grating sensor being convenient to networking, can realizing the measurement petroleum pipeline oil pressure of distributed measurement are provided.
The beam type optical fiber Bragg grating sensor that the utility model measures petroleum pipeline oil pressure completes by following technical solution: described sensor is by semi-girder (1), optical fiber leadout hole (2), derive optical fiber (3), optical fiber Bragg raster (4), pressure-bearing piston (5), iron shell (9), guide rod (10), epistasis glue (11) forms, the piston cylinder that wherein pressure-bearing piston (5) and iron shell (9) are formed matches, one end and the pressure-bearing piston (5) of guide rod (10) are fixed together, the other end of guide rod (10) is fixed together by epistasis glue (11) one end with semi-girder (1), the other end of semi-girder (1) is fixed on iron shell (9), two optical fiber Bragg rasters (4) are pasted onto on upper and lower two walls of semi-girder (1) respectively, and the one end of deriving optical fiber (3) is connected with optical fiber Bragg raster (4), derive optical fiber (3) and are connected with external optical cable by optical fiber leadout hole (2).
One end of described guide rod (10) is fixed together by epistasis glue (11) one end with semi-girder (1), and guide rod (10) is vertical in same plane with semi-girder (1); The other end of semi-girder (1) is fixed in iron shell (9), and semi-girder (1) is vertical with speciality shell (9); Guide rod (10) is perpendicular to the end face of piston (5).
Two described optical fiber Bragg rasters (4) are pasted onto on upper and lower two walls of semi-girder (1) respectively, two optical fiber Bragg rasters adopt the light-sensitive optical fibre of same model to make, two optical fiber Bragg rasters (4) up and down of semi-girder (1) wall form differential optical fiber Bragg grating, and differential optical fiber Bragg grating can eliminate the impact of temperature on fiber Bragg grating wavelength.
Described derivation optical fiber (3) is derived from optical fiber leadout hole (2), and optical fiber leadout hole (2) adopts epoxy resin to seal, and the inner chamber of iron shell (9) forms an airtight space.
The principle of work of described beam type optical fiber Bragg grating sensor is: pressure-bearing piston (5) passes to semi-girder (1) the oil pressure in petroleum pipeline by guide rod (10), semi-girder (1) left end is stressed will be bent upwards, the optical fiber Bragg raster (4) that the optical fiber Bragg raster (4) that drive is positioned at semi-girder (1) upper wall compresses and be positioned at semi-girder (1) wall stretches, by measurand detection be converted into modulation to optical fiber Bragg raster (4) wavelength, the differential type of optical fiber Bragg raster (4) is pasted with the impact helping offset environment temperature, the derivation optical fiber (3) of optical fiber Bragg raster (4) is drawn by optical fiber leadout hole (2) and is connected with external optical cable, form a kind of beam type optical fiber Bragg grating sensor measuring oil pressure in petroleum pipeline.
The mathematical model of described beam type optical fiber Bragg grating sensor is:
F suffered by pressure-bearing piston (5), equation is:
（a）
In formula,
pfor oil pressure in petroleum pipeline,
sfor the cross-sectional area of pressure-bearing piston.
Guide rod 10 will pass to semi-girder (1) suffered by pressure-bearing piston (5), and suffered by semi-girder left end is F.
Strain suffered by semi-girder (1) each point is:
（b）
In formula,
lfor the active length of equi intensity cantilever (1),
hfor the thickness of equi intensity cantilever (1),
bfor the width of equi intensity cantilever (1) stiff end,
efor the elastic modulus of equi intensity cantilever (1).
(a) is brought into (b) obtain:
(c)
When equi intensity cantilever (1) bends by the effect of F, what upper surface was subject to is tensile strain
, and lower surface is subject to is compressive strain
if two gratings are in same temperature field, strain signal
be expressed as:
（d）
In formula,
for lower surface is subject to the reflection wavelength of optical fiber Bragg raster (4) after tensile strain,
what be subject to for upper surface is the reflection wavelength of optical fiber Bragg raster (4) after compressive strain,
for the strain sensitive coefficient of optical fiber Bragg raster (4),
for optical fiber Bragg raster (4) initial center wavelength.
Be pasted onto optical fiber Bragg raster (4) the centre wavelength difference of upper and lower two walls of semi-girder (1)
for:
(e)
(d) and (e) is brought into (c) obtain:
（f）
Formula (f) shows oil pressure P in tested pipeline and optical fiber Bragg raster (4) wavelength shift
between mathematical model, just can be calculated the size of oil pressure in tested oil pipeline by measuring optical fiber Bragg grating (4) wavelength-shift.
A kind of beam type optical fiber Bragg grating sensor measuring petroleum pipeline oil pressure of the utility model compared with prior art has following beneficial effect:
1, as required, the measurement sensistivity of sensor can be adjusted by the contact position changing guide rod and semi-girder.
2, any electric signal is not with by the utility model sensor itself, is suitable for very much the inflammable and explosive liquid detecting waited in high-risk environment.
3, adopt optical fiber Bragg raster as the measuring sensor of sensor, make sensor have stronger anti-electromagnetic interference capability and corrosion resistance.
4, the utility model structure is simple, is convenient to install.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation measuring the beam type optical fiber Bragg grating sensor of petroleum pipeline oil pressure of the utility model.
Fig. 2 is a kind of local schematic top plan view measuring the beam type optical fiber Bragg grating sensor semi-girder of petroleum pipeline oil pressure of the utility model.
In figure, 1-semi-girder, 2-optical fiber leadout hole, 3-derive optical fiber, 4-optical fiber Bragg raster, 5-pressure-bearing piston, 6-oil, 7-oil transportation tube wall, 8-petroleum pipeline interface, 9-iron shell, 10-guide rod, 11-epistasis glue; B-semi-girder point of fixity width,
-semi-girder active length.
Embodiment
Below in conjunction with accompanying drawing and the course of work, a kind of beam type optical fiber Bragg grating sensor technical scheme measuring petroleum pipeline oil pressure of the utility model is further described.
Embodiment: as depicted in figs. 1 and 2, the beam type optical fiber Bragg grating sensor that the utility model measures petroleum pipeline oil pressure is made up of semi-girder 1, optical fiber leadout hole 2, derivation optical fiber 3, optical fiber Bragg raster 4, pressure-bearing piston 5, iron shell 9, guide rod 10, epistasis glue 11, the piston cylinder that wherein pressure-bearing piston 5 and iron shell 9 are formed matches, one end and the pressure-bearing piston 5 of guide rod 10 are fixed together, the other end of guide rod 10 is fixed together by epistasis glue 11 one end with semi-girder 1, and the other end of semi-girder 1 is fixed on iron shell 9; Two optical fiber Bragg rasters 4 are pasted onto on semi-girder about 1 two wall respectively, and the one end of deriving optical fiber 3 is connected with optical fiber Bragg raster 4, derive optical fiber 3 and are connected with external optical cable by optical fiber leadout hole 2.
One end of described guide rod 10 is fixed together by epistasis glue 11 one end with semi-girder 1, and guide rod 10 is vertical in same plane with semi-girder 1; The other end of semi-girder 1 is fixed at iron shell 9, and semi-girder 1 is vertical with speciality shell 9; Guide rod 10 is perpendicular to the end face of piston 5.
Two described optical fiber Bragg rasters 4 are pasted onto on semi-girder about 1 two wall respectively, two optical fiber Bragg rasters adopt the light-sensitive optical fibre of same model to make, two optical fiber Bragg rasters 4 up and down of semi-girder 1 wall form differential optical fiber Bragg grating, and differential optical fiber Bragg grating can eliminate the impact of temperature on fiber Bragg grating wavelength.
Described derivation optical fiber 3 is derived from optical fiber leadout hole 2, and optical fiber leadout hole 2 adopts epoxy resin to seal, and the inner chamber of iron shell 9 forms an airtight space.
The course of work of the present utility model is: when using the utility model, by iron shell 9 seal welding of sensor on oil transportation tube wall 7, and oil 6 is contacted with pressure-bearing piston 5 by petroleum pipeline interface 8; Pressure-bearing piston 5 passes to semi-girder 1 the oil pressure in petroleum pipeline by guide rod 10, semi-girder 1 left end is stressed will be bent upwards, the optical fiber Bragg raster 4 driving the optical fiber Bragg raster 4 being positioned at semi-girder 1 upper wall to compress and be positioned at semi-girder 1 wall stretches, by measurand detection be converted into modulation to optical fiber Bragg raster 4 wavelength, the differential type of optical fiber Bragg raster 4 is pasted with the impact helping offset environment temperature, the derivation optical fiber 3 of optical fiber Bragg raster 4 is drawn by optical fiber leadout hole 2 and is connected with external optical cable, signal transmission to external data harvester.Wherein, the design parameter of sensor is:
1, the dimensional parameters of semi-girder 1 is: active length
lfor 40mm, point of fixity width
bfor 20mm, No. 45 steel Young moduluss are
e=200GPa, semi-girder thickness
hfor 5mm;
2, the technical parameter of optical fiber Bragg raster 4 is: centre wavelength
=1550.000nm,
;
3, the dimensional parameters of pressure-bearing piston 5 is: long for 5mm, wide be 5mm, area
sbe 5 × 5mm
2;
4, sensor is installed and used by Fig. 1 configuration;
5, the Bragg wavelength of optical fiber Bragg raster 4 is obtained with fiber Bragg grating (FBG) demodulator;
6, according to formula (f), by being pasted onto the centre wavelength difference △ λ of the optical fiber Bragg raster 4 of upper and lower two walls of semi-girder
bthe oil pressure of sensor measurand can be calculated;
Each known quantity is substituted into above formula, and theory calculate shows, when oil pressure is 5 × 10
6during Pa, wavelength variable quantity is 725.401pm.
By reference to the accompanying drawings embodiment of the present utility model is explained in detail above, but the utility model is not limited to above-mentioned embodiment, in the ken that those of ordinary skill in the art possess, various change can also be made under the prerequisite not departing from the utility model aim.
Claims (4)
1. measure the beam type optical fiber Bragg grating sensor of petroleum pipeline oil pressure for one kind, it is characterized in that this sensor is by semi-girder (1), optical fiber leadout hole (2), derive optical fiber (3), optical fiber Bragg raster (4), pressure-bearing piston (5), iron shell (9), guide rod (10), epistasis glue (11) forms, the piston cylinder that wherein pressure-bearing piston (5) and iron shell (9) are formed matches, one end and the pressure-bearing piston (5) of guide rod (10) are fixed together, the other end of guide rod (10) is fixed together by epistasis glue (11) one end with semi-girder (1), the other end of semi-girder (1) is fixed on iron shell (9), two optical fiber Bragg rasters (4) are pasted onto on upper and lower two walls of semi-girder (1) respectively, and the one end of deriving optical fiber (3) is connected with optical fiber Bragg raster (4), derive optical fiber (3) and are connected with external optical cable by optical fiber leadout hole (2).
2. the beam type optical fiber Bragg grating sensor of the measurement petroleum pipeline oil pressure according to claims 1, it is characterized in that one end of guide rod (10) is fixed together by epistasis glue (11) one end with semi-girder (1), guide rod (10) is vertical in same plane with semi-girder (1); The other end of semi-girder (1) is fixed in iron shell (9), and semi-girder (1) is vertical with speciality shell (9); Guide rod (10) is perpendicular to the end face of piston (5).
3. the beam type optical fiber Bragg grating sensor of the measurement petroleum pipeline oil pressure according to claims 1, it is characterized in that two optical fiber Bragg rasters (4) are pasted onto on upper and lower two walls of semi-girder (1) respectively, two optical fiber Bragg rasters adopt the light-sensitive optical fibre of same model to make, and two optical fiber Bragg rasters (4) up and down of semi-girder (1) wall form differential optical fiber Bragg grating.
4. the beam type optical fiber Bragg grating sensor of the measurement petroleum pipeline oil pressure according to claims 1, it is characterized in that deriving optical fiber (3) derives from optical fiber leadout hole (2), optical fiber leadout hole (2) adopts epoxy resin to seal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520268369.0U CN204831682U (en) | 2015-04-29 | 2015-04-29 | Measure cantilever beam type optic fibre bragg grating sensor of defeated oil pipe oil pressure |
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| CN201520268369.0U CN204831682U (en) | 2015-04-29 | 2015-04-29 | Measure cantilever beam type optic fibre bragg grating sensor of defeated oil pipe oil pressure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109269978A (en) * | 2018-11-16 | 2019-01-25 | 西南科技大学 | Measure the measuring device and measuring method of adhesion strength between solid liquid interface under electric field |
| CN114459513A (en) * | 2021-12-15 | 2022-05-10 | 国网山东省电力公司济南供电公司 | Power cable hole plugging monitoring device and method |
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2015
- 2015-04-29 CN CN201520268369.0U patent/CN204831682U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109269978A (en) * | 2018-11-16 | 2019-01-25 | 西南科技大学 | Measure the measuring device and measuring method of adhesion strength between solid liquid interface under electric field |
| CN109269978B (en) * | 2018-11-16 | 2024-01-30 | 西南科技大学 | Measuring device and measuring method for measuring adhesion force between solid-liquid interfaces under electric field |
| CN114459513A (en) * | 2021-12-15 | 2022-05-10 | 国网山东省电力公司济南供电公司 | Power cable hole plugging monitoring device and method |
| CN114459513B (en) * | 2021-12-15 | 2024-09-03 | 国网山东省电力公司济南供电公司 | Power cable hole plugging monitoring device and method |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151202 Termination date: 20160429 |