CN102721504A - Optical-fiber static pressure oilcan measuring system based on multiplex structure - Google Patents
Optical-fiber static pressure oilcan measuring system based on multiplex structure Download PDFInfo
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- CN102721504A CN102721504A CN201110078177XA CN201110078177A CN102721504A CN 102721504 A CN102721504 A CN 102721504A CN 201110078177X A CN201110078177X A CN 201110078177XA CN 201110078177 A CN201110078177 A CN 201110078177A CN 102721504 A CN102721504 A CN 102721504A
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Abstract
The invention provides an optical-fiber static pressure oilcan measuring system based on multiplex structure. The system comprises: a wide-band laser, an optical-fiber circulator, a high speed spectrometer, a high speed data processor, a quantification estimation system, an optical switch, a single-mode fiber, a wavelength division multiplexer and a measuring device. The optical-fiber static pressure oilcan measuring system based on a multiplex structure in the invention has an all-optical structure and allows multiplexing of one optical fiber for a plurality of physical quantities to be realized . The optical-fiber static pressure oilcan measuring system can not only measure static pressure of an oilcan, but also measure oil vapour pressure. The system not only utilizes bandwidth resource fully, improves resource utilization rate of optical signal processing devices, but also is intrinsically safe. Troubles of high pressure and heavy current and hazards of lightning and lightning stroke can be fundamentally eliminated/prevented/avoided if the system is used in an explosive environment.
Description
Technical field
The present invention relates to the security measurement technical field, especially relate to a kind of optical fiber static pressure measurement syetem of oil tank based on multiplexing structure.
Background technology
It is alarming potential safety hazard that the high pressure forceful electric power gets into explosive atmosphere.For example in the oil field of storage, the technical method that the oil tank reserves are measured current popular all can electricity consumption, and jar even electricity advance jar on the electricity, have serious potential safety hazard.
Summary of the invention
To defective that exists in the prior art and deficiency, the objective of the invention is to propose that a kind of security is better, function is more complete, the higher optical fiber static pressure measurement syetem of oil tank based on multiplexing structure of accuracy.
In order to achieve the above object; The present invention proposes a kind of optical fiber static pressure measurement syetem of oil tank, comprising: wideband laser, optical fiber circulator, high-speed light spectrometer, high-speed data processor, quantitative estimation system, photoswitch, single-mode fiber, wavelength division multiplexer, measurement mechanism based on multiplexing structure;
Said measurement mechanism comprises: be used for gaging pressure fibre optic compression sensor, be used to measure the fibre optic temperature sensor of temperature; Said fibre optic compression sensor and said fibre optic temperature sensor are arranged on the oil tank outside, measure oil vapour pressure, tank skin outside environment temperature parameter in the static pressure, oil tank of liquid in the oil tank; Said fibre optic temperature sensor, fibre optic compression sensor are connected with wavelength division multiplexer.Said wavelength division multiplexer connects photoswitch through single-mode fiber; Said wideband laser connects photoswitch through optical fiber circulator; Connect optical fiber circulator on the said high-speed light spectrometer, connect high-speed data processor down; Said high-speed data processor connects said quantitative estimation system.
Preferred as technique scheme, said wideband laser is the amplified spontaneous emission light source.
Preferred as technique scheme, said fibre optic compression sensor is the optical fibre Fabry-perot interferometric sensor.
Preferred as technique scheme, fibre optic temperature sensor is an optical fiber Bragg grating temperature sensor.
Preferred as technique scheme, said wavelength division multiplexer is an optical fiber CWDM Coarse Wave Division Multiplexer.
Preferred as technique scheme, said high-speed light spectrometer is a FBGA type spectrum demodulation module.
Preferred as technique scheme, said single-mode fiber connects two measurement mechanisms through wavelength division multiplexer, measures oil vapour pressure, tank skin outside environment temperature parameter in the static pressure, oil tank of liquid in the oil tank respectively.
Preferred as technique scheme, said system comprises a plurality of measurement mechanisms, measures oil vapour pressure, tank skin outside environment temperature parameter in the static pressure, oil tank of a plurality of oil tanks.
Optical fiber static pressure measurement syetem of oil tank based on multiplexing structure of the present invention is a full light structural, has realized the multiplexing optical fiber of a plurality of physical quantitys, both can measure the oil tank static pressure; Can measure oil vapour pressure again; Not only make full use of bandwidth resources, improved the resource utilization of light signal processing device, and essential safety; Be used in explosive atmosphere, can fundamentally stop the puzzlement of high pressure forceful electric power, the harm of lightning thunderbolt.
Description of drawings
Fig. 1 is the structural representation of the preferred embodiment of the present invention one.
Embodiment
Further specify below in conjunction with 1 pair of preferred embodiment of the present invention one of accompanying drawing.
The embodiment of the invention has proposed a kind of optical fiber static pressure measurement syetem of oil tank based on multiplexing structure; Its structure is as shown in Figure 1, comprising: wideband laser 1, optical fiber circulator 2, photoswitch 3, high-speed light spectrometer 4, high-speed data processor 5, quantitative estimation system 6, single-mode fiber 7, wavelength division multiplexer 8, measurement mechanism.Measurement mechanism comprises: fibre optic temperature sensor 9, fibre optic compression sensor 10.Fibre optic temperature sensor 9, fibre optic compression sensor 10 are arranged on the oil tank outside, measure steam pressure, tank skin outside environment temperature parameter in the static pressure, oil tank of liquid in the oil tank.In embodiments of the present invention, photoswitch can connect many single-mode fibers; Single-mode fiber can connect a plurality of measurement mechanisms through wavelength division multiplexer, measures in a plurality of oil tanks oil vapour pressure in hydrostatic pressure, the oil tank, tank skin outside environment temperature.Be that example describes with two measurement mechanisms, two oil tanks among Fig. 1.
Fibre optic temperature sensor 9 is connected with wavelength division multiplexer 8 with fibre optic compression sensor 10; Wavelength division multiplexer 8 connects photoswitch 3 through single-mode fiber 7.In embodiments of the present invention, can measure the parameter of a plurality of oil tanks simultaneously.That is: photoswitch 3 connects a plurality of wavelength division multiplexers 8, and each wavelength division multiplexer 8 can connect fibre optic temperature sensor 9, fibre optic compression sensor 10.
As shown in Figure 1, wideband laser 1 connects optical fiber circulator 2, and optical fiber circulator 2 connects photoswitch 3.In use, the light of wideband laser 1 output sends to photoswitch 3 through optical fiber circulator 2, flows to wavelength division multiplexer 8 at a distance through single-mode fiber 7, is divided into four irradiation fibre optic temperature sensors 9, fibre optic compression sensor 10.High-speed data processor 5 select the oil tank that will measure; The fibre optic temperature sensor 9 that this oil tank is corresponding, fibre optic compression sensor 10 are gathered the temperature of tank bottom static pressure, oil tank overhead vapor pressure signal, jar outside environment; The optical information of pressure and temp data is transmitted back to photoswitch 3 through wavelength division multiplexer 8, single-mode fiber 7; Directly give high-speed light spectrometer 4 by optical fiber circulator 2 and carry out demodulation; After 5 pairs of data of high-speed data processor are cut apart the deletion processing, obtain respectively sending to quantitative estimation system 6 behind static pressure, steam pressure, the temperature data.Quantitative estimation system 6 calculates parameters such as the liquid level, volume, quality of oil tank according to pressure, temperature data.
Wherein, photoswitch 3 can be mechanical optical switch or other forms of photoswitch.Fibre optic compression sensor 10 can be the optical fibre Fabry-perot interferometric sensor; Fibre optic temperature sensor 9 can be optical fiber Bragg grating temperature sensor; High-speed light spectrometer 8 can be FBGA type spectrum demodulation module.
The present invention is full fiber body architecture, and single-mode optical fiber length can reach 3km, and electricity does not advance explosive atmosphere, and electricity is not gone up jar, essential safety.The present invention adopts cuts apart deletion algorithm, and two pressure informations and two temperature informations that will on same optical fiber, transmit are separated, and have solved a multiplex technique difficult problem; Both realized the compensation of fibre optic compression sensor pulling temperature, the correction of tank body allowance for expansion greatly reduces cost again; Optimized structure; Also measured oil tank oil vapour pressure, compensation oil vapour pressure is to the influence of static pressure and the monitoring through oil vapour pressure, prevents that oil tank from inhaling flat expansion accident.The present invention adopts the empty wavelength-division multiplex technique that divides, and can connect a plurality of Fibre Optical Sensors on the optical fiber, has reduced cost, simplifies the structure.The present invention adopts high-speed light spectrometer, high-speed data processor and timesharing scan method on architecture, a plurality of jars are carried out timesharing measure, and reduces system cost greatly.Data processing speed of the present invention 0.5 second, 32 jar Refresh Data speed only need 16 seconds, and are feasible on the engineering.
Certainly; The present invention also can have other embodiment; Under the situation that does not deviate from spirit of the present invention and essence thereof; The person of ordinary skill in the field works as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection domain of claim of the present invention.
Claims (8)
1. optical fiber static pressure measurement syetem of oil tank based on multiplexing structure; It is characterized in that, comprising: wideband laser, optical fiber circulator, high-speed light spectrometer, high-speed data processor, quantitative estimation system, photoswitch, single-mode fiber, wavelength division multiplexer, measurement mechanism; Said measurement mechanism comprises: be used for gaging pressure fibre optic compression sensor, be used to measure the fibre optic temperature sensor of temperature; Said fibre optic compression sensor and said fibre optic temperature sensor are connected with wavelength division multiplexer; Said wavelength division multiplexer connects photoswitch through single-mode fiber; Said wideband laser connects photoswitch through optical fiber circulator; Connect optical fiber circulator on the said high-speed light spectrometer, connect high-speed data processor down; Said high-speed data processor connects said quantitative estimation system.
2. the optical fiber static pressure measurement syetem of oil tank based on multiplexing structure according to claim 1 is characterized in that said wideband laser is the amplified spontaneous emission light source.
3. the optical fiber static pressure measurement syetem of oil tank based on multiplexing structure according to claim 1 is characterized in that said fibre optic compression sensor is the optical fibre Fabry-perot interferometric sensor.
4. the optical fiber static pressure measurement syetem of oil tank based on multiplexing structure according to claim 1 is characterized in that fibre optic temperature sensor is an optical fiber Bragg grating temperature sensor.
5. the optical fiber static pressure measurement syetem of oil tank based on multiplexing structure according to claim 1 is characterized in that said wavelength division multiplexer is an optical fiber CWDM Coarse Wave Division Multiplexer.
6. the optical fiber static pressure measurement syetem of oil tank based on multiplexing structure according to claim 1 is characterized in that, said high-speed light spectrometer is a FBGA type spectrum demodulation module.
7. according to each described optical fiber static pressure measurement syetem of oil tank of claim 1～6 based on multiplexing structure; It is characterized in that; Said single-mode fiber connects one or more measurement mechanisms through wavelength division multiplexer, and said measurement mechanism connects said wavelength division multiplexer.
8. according to each described optical fiber static pressure measurement syetem of oil tank of claim 1～6, it is characterized in that said system comprises a plurality of measurement mechanisms based on multiplexing structure.
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| CN103076060A (en) * | 2012-12-19 | 2013-05-01 | 北京金旗华瑞科技发展有限公司 | Measuring system and method for volume of oil tank truck |
| CN105841859A (en) * | 2016-04-07 | 2016-08-10 | 中国航空工业集团公司西安飞机设计研究所 | Airplane surface pressure detection system |
| CN106017613A (en) * | 2016-05-13 | 2016-10-12 | 江苏昂德光电科技有限公司 | Optical fiber laser liquid level sensing system |
| CN111609980A (en) * | 2020-06-03 | 2020-09-01 | 江阴市富仁高科股份有限公司 | Assembly process of double-layer oil tank online monitoring system |
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| WO2008034225A1 (en) * | 2006-09-18 | 2008-03-27 | Qps Photronics Inc. | Optical sensor and method for making same |
| CN101158592A (en) * | 2007-10-15 | 2008-04-09 | 北京航空航天大学 | Optical fiber distributed temperature and stress sensing device |
| CN101158591A (en) * | 2007-10-15 | 2008-04-09 | 北京航空航天大学 | Detecting method suitable for optical fiber distributed temperature and stress sensing device |
| CN101592475A (en) * | 2009-06-08 | 2009-12-02 | 中国计量学院 | Fully distributed fiber Rayleigh and Raman scattering photon strain, temperature sensor |
| CN101915595A (en) * | 2010-08-11 | 2010-12-15 | 武汉理工大学 | Wavelength division multiplexing network construction method and system based on frequency domain reflection fiber grating sensing technique |
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- 2011-03-30 CN CN201110078177XA patent/CN102721504A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2008034225A1 (en) * | 2006-09-18 | 2008-03-27 | Qps Photronics Inc. | Optical sensor and method for making same |
| CN101158592A (en) * | 2007-10-15 | 2008-04-09 | 北京航空航天大学 | Optical fiber distributed temperature and stress sensing device |
| CN101158591A (en) * | 2007-10-15 | 2008-04-09 | 北京航空航天大学 | Detecting method suitable for optical fiber distributed temperature and stress sensing device |
| CN101592475A (en) * | 2009-06-08 | 2009-12-02 | 中国计量学院 | Fully distributed fiber Rayleigh and Raman scattering photon strain, temperature sensor |
| CN101915595A (en) * | 2010-08-11 | 2010-12-15 | 武汉理工大学 | Wavelength division multiplexing network construction method and system based on frequency domain reflection fiber grating sensing technique |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103076060A (en) * | 2012-12-19 | 2013-05-01 | 北京金旗华瑞科技发展有限公司 | Measuring system and method for volume of oil tank truck |
| CN103076060B (en) * | 2012-12-19 | 2016-06-22 | 北京金旗华瑞科技发展有限公司 | A kind of oil truck volumetric measurement system and method |
| CN105841859A (en) * | 2016-04-07 | 2016-08-10 | 中国航空工业集团公司西安飞机设计研究所 | Airplane surface pressure detection system |
| CN106017613A (en) * | 2016-05-13 | 2016-10-12 | 江苏昂德光电科技有限公司 | Optical fiber laser liquid level sensing system |
| CN111609980A (en) * | 2020-06-03 | 2020-09-01 | 江阴市富仁高科股份有限公司 | Assembly process of double-layer oil tank online monitoring system |
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Application publication date: 20121010 |