CN102506740A - Deformation on-line monitoring device of bottom plate of storage tank based on optical fiber grating - Google Patents
Deformation on-line monitoring device of bottom plate of storage tank based on optical fiber grating Download PDFInfo
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- CN102506740A CN102506740A CN2011103573798A CN201110357379A CN102506740A CN 102506740 A CN102506740 A CN 102506740A CN 2011103573798 A CN2011103573798 A CN 2011103573798A CN 201110357379 A CN201110357379 A CN 201110357379A CN 102506740 A CN102506740 A CN 102506740A
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- 238000003860 storage Methods 0.000 title claims abstract description 41
- 239000013307 optical fiber Substances 0.000 title claims abstract description 33
- 238000012806 monitoring device Methods 0.000 title abstract 5
- 239000000835 fiber Substances 0.000 claims description 67
- 238000001228 spectrum Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 238000005260 corrosion Methods 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 claims description 3
- 230000006698 induction Effects 0.000 claims description 3
- 229920002521 macromolecule Polymers 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 abstract description 15
- 238000005516 engineering process Methods 0.000 abstract description 7
- 230000003595 spectral effect Effects 0.000 abstract 3
- 238000011897 real-time detection Methods 0.000 abstract 1
- 239000010779 crude oil Substances 0.000 description 20
- 230000003287 optical effect Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000012502 risk assessment Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000009659 non-destructive testing Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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Abstract
The invention relates to a deformation on-line monitoring device of a bottom plate of a storage tank based on an optical fiber grating, and belongs to the field of monitoring technologies of the storage tank. The deformation on-line monitoring device of the bottom plate of the storage tank based on the optical fiber grating is characterized in that the on-line monitoring device comprises a microprocessor, a spectral demodulating instrument and an optical fiber refractive index sensor, wherein the optical fiber refractive index sensor is connected with the spectral demodulating instrument; the spectral demodulating instrument is connected with the microprocessor; and the optical fiber refractive index sensor is mounted at the bottom of the storage tank to sense stress changes of the bottom of the storage tank under a prestressing force. The on-line monitoring device has the advantages of simple structure, steady performance, reliability in trend prediction, real-time detection, high data precision, and the like, is convenient to operate, and utilizes optical fibers as a sensing device.
Description
Technical field
The invention belongs to the storage tank monitoring technical field, particularly relate to a kind of storage tank bottom plate deformation on-Line Monitor Device based on fiber grating.
Background technology
At present, crude oil storage tank is the visual plant of storage crude oil, and its safe operation concerns great, in case have an accident, not only can bring serious economy loss and personal injury, but also can bring bad politics, economy, environmental impact.The failure cause of crude oil storage tank is a lot, and wherein the impaired of storage tank bottom plate will directly cause large-scale safety and environmental protection liability accidents such as crude oil leakage, storage tank breaking-up.From the galvanochemistry angle analysis, bottom plate of crude oil tank is because upper surface directly contacts former wet goods corrosive interior medium, and the lower surface contact face of land is prone to have erosion condition generations such as sewage; From the mechanics angle analysis, because the unevenness of settlement of foundation, and the alternate load that crude oil constantly pressurizes, stress-relief process causes all can cause the distortion of storage tank bottom plate.
Lack effective on-line monitoring means at present for bottom plate of crude oil tank; Generally adopt both at home and abroad and periodically open a jar cleaning, carry out nondestructive examination then, consumed time cost, manpower and materials are huge; Depend on human factor and detect conclusion, have personal error.Especially external force the conventional nondestructive testing technique of subtle change that tank bottom is caused can't effectively be monitored, and failure procedure often the accumulation of microstrain finally cause the plastic yield of tank bottom.
Summary of the invention
The present invention provides a kind of storage tank bottom plate deformation on-Line Monitor Device based on fiber grating for solving the problem that prior art exists.
The object of the invention provides a kind ofly to be had simple in structurely, easy to operate, and stable performance utilizes optical fiber as senser element, and trend prediction is reliable, and data precision is high, the storage tank bottom plate deformation on-Line Monitor Device based on fiber grating of characteristics such as detection in real time.
The present invention has broken through the technological blind spot that bottom plate of crude oil tank does not have real-time monitoring means, of the present inventionly provides a kind of and can carry out the deformation monitoring new technology to bottom plate of crude oil tank by real-time online.Make it can pass through sensor, accurately monitor the variation and the trend of deformation risk to the monitoring point.
The present invention utilizes optical fiber as senser element, adopts the distributed optical fiber stress sensing technology, comes the STRESS VARIATION degree of sensing bottom plate of crude oil tank weld seam through the variation of detection fiber optical parameter, thereby is finally inversed by the deformation situation of storage tank bottom plate.Real-time, networked monitoring be can realize and bottom plate of crude oil tank STRESS VARIATION degree and risk assessment provided.
The storage tank bottom plate deformation on-Line Monitor Device that the present invention is based on fiber grating adopts following technical scheme:
A kind of storage tank bottom plate deformation on-Line Monitor Device based on fiber grating, it is characterized in that: on-Line Monitor Device comprises microprocessor, spectrum (FBG) demodulator and optical fibre refractivity sensor; The optical fibre refractivity sensor connects the spectrum (FBG) demodulator, and the spectrum (FBG) demodulator connects microprocessor; The optical fibre refractivity sensor is installed on tank bottom, the STRESS VARIATION under the induction tank bottom prestress.
The storage tank bottom plate deformation on-Line Monitor Device that the present invention is based on fiber grating can also adopt following technical measures:
Described storage tank bottom plate deformation on-Line Monitor Device based on fiber grating; Be characterized in: the optical fibre refractivity sensor has blazed fiber bragg grating, single-mode fiber, fibre-optical splice; Blazed fiber bragg grating connects single-mode fiber; Single-mode fiber is connected with fibre-optical splice, and blazed fiber bragg grating penetrates the sheet shell, is positioned over tank bottom.
Described storage tank bottom plate deformation on-Line Monitor Device based on fiber grating, be characterized in: the sheet shell is a rectangular structure, and blazed fiber bragg grating penetrates the rectangular area of sheet shell.
Described storage tank bottom plate deformation on-Line Monitor Device based on fiber grating is characterized in: blazed fiber bragg grating is that the phase mask of 1300nm～1800nm wave band is write system through the uv-exposure method, grid face tilt angle 5～10 degree, grid region length 5～15mm.
Described storage tank bottom plate deformation on-Line Monitor Device based on fiber grating, be characterized in: the single-mode fiber core diameter is 5～10um, the 1300nm of surrounding layer 100～150nm um～1800nm silica fibre.
Described storage tank bottom plate deformation on-Line Monitor Device based on fiber grating is characterized in: the long 10～30mm of sheet shell, wide 10～15mm, high 1～2mm; Be the stearic material of corrosion-resistant macromolecule.
Advantage that the present invention has and good effect:
Based on the storage tank bottom plate deformation on-Line Monitor Device of fiber grating,, compared with prior art, the invention solves a kind of novel bottom plate of crude oil tank weld seam deformation monitoring owing to adopted brand-new technology scheme of the present invention.Utilize optical fiber as senser element, adopt the distributed optical fiber stress sensing technology, come the STRESS VARIATION degree of sensing bottom plate of crude oil tank weld seam through the variation of detection fiber optical parameter, thereby be finally inversed by the deformation situation of storage tank bottom plate.Real-time, networked monitoring be can realize and bottom plate of crude oil tank STRESS VARIATION degree and risk assessment provided.
The present invention has simple in structure, and assembling is compact, and is easy to operate, time saving and energy saving, and low cost of manufacture is stable and reliable for performance, long service life, and position judgment is accurate, and trend prediction is reliable, detects the data precision advantages of higher in real time.
Description of drawings
Fig. 1 is the storage tank bottom plate deformation on-Line Monitor Device structural representation of crude oil storage tank of the present invention based on fiber grating;
Fig. 2 is the structural representation of blazed fiber bragg grating sensor of the present invention;
Fig. 3 is the plan structure synoptic diagram of Fig. 2;
Fig. 4 is the forward sight structural representation of Fig. 2.
Among the figure, 1. storage tank, 2. optical fibre refractivity sensor, 2.1 blazed fiber bragg gratings, 2.2 single-mode fibers, 2.3 shells, 2.4 fibre-optical splices, 3. single-mode fiber, 4. spectrum (FBG) demodulator, 5. optical fiber, 6. computing machine.
Embodiment
For further understanding technology contents of the present invention, characteristics and effect, enumerate following instance now, and conjunction with figs. specifies as follows:
With reference to accompanying drawing 1 to Fig. 4.
Embodiment 1
A kind of storage tank bottom plate deformation on-Line Monitor Device based on fiber grating comprises little process computer 6, spectrum (FBG) demodulator 4 and surface patch formula optical fibre refractivity sensor 2; Surface patch formula optical fibre refractivity sensor 2 connects spectrum (FBG) demodulator 4, and spectrum (FBG) demodulator 4 connects computing machine 6; Optical fibre refractivity sensor 2 is installed on storage tank 1 bottom, the STRESS VARIATION under the induction tank bottom prestress.
Optical fibre refractivity sensor 2 has blazed fiber bragg grating 2.1, single-mode fiber 2.2, fibre-optical splice 2.4; Blazed fiber bragg grating 2.1 connects single-mode fiber 2.2; Single-mode fiber 2.2 is connected with fibre-optical splice 2.4, and blazed fiber bragg grating 2.1 penetrates sheet shell 2.3, is positioned over storage tank 1 bottom.Sheet shell 2.3 is a rectangular structure, and blazed fiber bragg grating 2.1 penetrates the rectangular area of sheet shell.
The detailed description of present embodiment:
A kind of bottom plate of crude oil tank deformation monitoring based on Fibre Optical Sensor, its technical scheme is following:
1. surface patch formula optical fibre refractivity sensor
The weld seam of bottom plate of crude oil tank is a storage tank weakness zone the most, also is to concentrate regionally the most at stress.Therefore, the core that has designed a kind of this sensor of distributed index sensor based on optical fiber is the overlength blazed fiber bragg grating, and its grid region length can reach tens centimetres.Sensor integral body is designed to paste the formula sheet, and pastes in the commissure as required.When weld stress was concentrated gradually, different according to its intensity, mutually deserved variation can take place in prestressed fiber-optic grating sensor, and must change through monitoring overlength blazed grating projection light wavelength, can analyze STRESS VARIATION and degree.
Surface patch formula optical fibre refractivity sensor, primary structure comprises: overlength blazed fiber bragg grating 2.1, single-mode fiber 2.2, sheet shell 2.3, fibre-optical splice 2.4.Be characterized in: overlength blazed fiber bragg grating 2.1 is connected with an end of single-mode fiber 2.2.The other end of single-mode fiber 2.2 is connected with fibre-optical splice.Then it is penetrated in the cube shell 2.3.The structure of sheet shell 2.3 is a rectangular structure, with the grid region of overlength blazed fiber bragg grating 2.1 be positioned over sheet shell 2.3 the rectangular area so that its can under prestress, respond in the extraneous STRESS VARIATION.
2. bottom plate of crude oil tank weld seam deformation monitoring network system
Many surface patch distribution type fiber-optic index sensors are pasted in the commissure, and be connected to optical spectrum instrumentation through optical fiber, thus the stress monitoring system of formation bottom plate of crude oil tank weld seam.Monitoring system is monitored the sensing data of each sensor in real time; Arrangement and analyzing oil and gas pipeline weld stress concentrate state; And compare with historical record, thereby provide the sector-style danger assessment of going forward side by side of pipeline weld stress central tendency, thus be finally inversed by the deformation situation of tank bottom;
Bottom plate of crude oil tank weld seam deformation monitoring network system, primary structure comprises: surface patch formula optical fibre refractivity sensor 2, single-mode fiber 3, spectrum (FBG) demodulator 4, computing machine 6.Its characteristics are: each surface patch formula optical fibre refractivity sensor is linked to each other with 3 spectrum (FBG) demodulators through 2 single-mode fibers.3 spectrum (FBG) demodulators link to each other with 4 computing machines through netting twine.
Surface patch formula optical fibre refractivity sensor: 1. the overlength blazed fiber bragg grating adopts the phase mask of 1550nm wave band to write system through the uv-exposure method.Grid face tilt angle 8 degree.Grid region length 10mm.It is 7um that 2 single-mode fibers adopt core diameter, the 1550nm silica fibre of surrounding layer 125um.3. the sheet shell adopts long 20mm, wide 10mm, and the rectangular structure of high 2mm, its material is the stearic material of corrosion resistant macromolecule.
Claims (6)
1. storage tank bottom plate deformation on-Line Monitor Device based on fiber grating, it is characterized in that: on-Line Monitor Device comprises microprocessor, spectrum (FBG) demodulator and optical fibre refractivity sensor; The optical fibre refractivity sensor connects the spectrum (FBG) demodulator, and the spectrum (FBG) demodulator connects microprocessor; The optical fibre refractivity sensor is installed on tank bottom, the STRESS VARIATION under the induction tank bottom prestress.
2. according to the described storage tank bottom plate deformation on-Line Monitor Device of claim 1 based on fiber grating; It is characterized in that: the optical fibre refractivity sensor has blazed fiber bragg grating, single-mode fiber, fibre-optical splice; Blazed fiber bragg grating connects single-mode fiber; Single-mode fiber is connected with fibre-optical splice, and blazed fiber bragg grating penetrates the sheet shell, is positioned over tank bottom.
3. according to the described storage tank bottom plate deformation on-Line Monitor Device based on fiber grating of claim 1, it is characterized in that: the sheet shell is a rectangular structure, and blazed fiber bragg grating penetrates the rectangular area of sheet shell.
4. according to claim 2 or 3 described storage tank bottom plate deformation on-Line Monitor Device based on fiber grating; It is characterized in that: blazed fiber bragg grating is that the phase mask of 1300nm～1800nm wave band is write system through the uv-exposure method; Grid face tilt angle 5～10 degree, grid region length 5～15mm.
5. according to claim 2 or 3 described storage tank bottom plate deformation on-Line Monitor Device based on fiber grating, it is characterized in that: the single-mode fiber core diameter is 5～10um, the 1300nm of surrounding layer 100～150nm um～1800nm silica fibre.
6. according to claim 2 or 3 described storage tank bottom plate deformation on-Line Monitor Device, it is characterized in that: the long 10～30mm of sheet shell, wide 10～15mm, high 1～2mm based on fiber grating; Be the stearic material of corrosion-resistant macromolecule.
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| CN2011103573798A CN102506740A (en) | 2011-11-11 | 2011-11-11 | Deformation on-line monitoring device of bottom plate of storage tank based on optical fiber grating |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102926808A (en) * | 2012-10-25 | 2013-02-13 | 南阳理工学院 | Underground coal dressing chamber bottom plate online monitoring device and method based on fiber bragg grating sensing |
| CN105571620A (en) * | 2015-12-21 | 2016-05-11 | 山东大学 | on-line damage detection device for filter board of filter press and enforcement method |
| CN105604609A (en) * | 2016-01-11 | 2016-05-25 | 南阳师范学院 | Novel remote online monitoring system and method for underground chamber bottom plate deformation |
| CN105674947A (en) * | 2016-03-31 | 2016-06-15 | 西南石油大学 | Large-sized oil storage tank deformation monitoring and deviation correcting device and method |
| CN106225841A (en) * | 2016-07-14 | 2016-12-14 | 武汉理工大学 | The device and method of on-line monitoring coking tower health status |
| CN108298216A (en) * | 2018-03-16 | 2018-07-20 | 安徽理工大学 | The monitoring system and method for oil storage tank leakage |
| CN108844963A (en) * | 2018-06-22 | 2018-11-20 | 重庆大学 | Large-scale storage tank Corrosion of base plate defect on-line monitoring system and method |
| CN109323995A (en) * | 2017-11-16 | 2019-02-12 | 中国石油化工股份有限公司 | A kind of gas phase connection storage tank oxygen content on-Line Monitor Device based on laser fiber |
| CN110319954A (en) * | 2018-03-28 | 2019-10-11 | 无锡市工业设备安装有限公司 | Tunnel is detected in the device and method with fan suspended fixed bottom plate bead crack |
| CN111504214A (en) * | 2020-03-27 | 2020-08-07 | 中国特种设备检测研究院 | A large crude oil storage tank deformation optical fiber monitoring device, system and method |
| CN112945282A (en) * | 2021-02-04 | 2021-06-11 | 中国特种设备检测研究院 | Large-scale crude oil storage tank large-angle weld defect optical fiber monitoring method and system |
| CN113063518A (en) * | 2021-03-24 | 2021-07-02 | 山东特种设备检验检测集团有限公司 | Atmospheric storage tank bottom plate corrosion monitoring method based on optical fiber sensing |
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2011
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102926808B (en) * | 2012-10-25 | 2015-04-22 | 南阳理工学院 | Underground coal dressing chamber bottom plate online monitoring device and method based on fiber bragg grating sensing |
| CN102926808A (en) * | 2012-10-25 | 2013-02-13 | 南阳理工学院 | Underground coal dressing chamber bottom plate online monitoring device and method based on fiber bragg grating sensing |
| CN105571620A (en) * | 2015-12-21 | 2016-05-11 | 山东大学 | on-line damage detection device for filter board of filter press and enforcement method |
| CN105604609A (en) * | 2016-01-11 | 2016-05-25 | 南阳师范学院 | Novel remote online monitoring system and method for underground chamber bottom plate deformation |
| CN105604609B (en) * | 2016-01-11 | 2018-06-15 | 南阳师范学院 | A new type of remote online monitoring system and method for deformation of underground chamber floor |
| CN105674947A (en) * | 2016-03-31 | 2016-06-15 | 西南石油大学 | Large-sized oil storage tank deformation monitoring and deviation correcting device and method |
| CN106225841A (en) * | 2016-07-14 | 2016-12-14 | 武汉理工大学 | The device and method of on-line monitoring coking tower health status |
| CN106225841B (en) * | 2016-07-14 | 2019-01-29 | 武汉理工大学 | Monitor the device and method of coking tower health status on-line |
| CN109323995A (en) * | 2017-11-16 | 2019-02-12 | 中国石油化工股份有限公司 | A kind of gas phase connection storage tank oxygen content on-Line Monitor Device based on laser fiber |
| CN108298216A (en) * | 2018-03-16 | 2018-07-20 | 安徽理工大学 | The monitoring system and method for oil storage tank leakage |
| CN110319954A (en) * | 2018-03-28 | 2019-10-11 | 无锡市工业设备安装有限公司 | Tunnel is detected in the device and method with fan suspended fixed bottom plate bead crack |
| CN108844963A (en) * | 2018-06-22 | 2018-11-20 | 重庆大学 | Large-scale storage tank Corrosion of base plate defect on-line monitoring system and method |
| CN111504214A (en) * | 2020-03-27 | 2020-08-07 | 中国特种设备检测研究院 | A large crude oil storage tank deformation optical fiber monitoring device, system and method |
| CN111504214B (en) * | 2020-03-27 | 2021-06-08 | 中国特种设备检测研究院 | Optical fiber monitoring method for deformation of large crude oil storage tank body |
| CN112945282A (en) * | 2021-02-04 | 2021-06-11 | 中国特种设备检测研究院 | Large-scale crude oil storage tank large-angle weld defect optical fiber monitoring method and system |
| CN112945282B (en) * | 2021-02-04 | 2022-04-05 | 中国特种设备检测研究院 | Optical fiber monitoring method and system for large fillet weld defects in large crude oil storage tanks |
| CN113063518A (en) * | 2021-03-24 | 2021-07-02 | 山东特种设备检验检测集团有限公司 | Atmospheric storage tank bottom plate corrosion monitoring method based on optical fiber sensing |
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Application publication date: 20120620 |