CN1525157A - Natural gas hydrate state change simulation experiment photodetection system - Google Patents
Natural gas hydrate state change simulation experiment photodetection system Download PDFInfo
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- CN1525157A CN1525157A CNA031128920A CN03112892A CN1525157A CN 1525157 A CN1525157 A CN 1525157A CN A031128920 A CNA031128920 A CN A031128920A CN 03112892 A CN03112892 A CN 03112892A CN 1525157 A CN1525157 A CN 1525157A
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Abstract
The invention relates to an analog testing and photoelectric detecting system of natural gas hydrate state change. The top end of high-pressure balancing kettle in temperature control water tank is set with windows and the scattering illumination emitter heads are set in the windows, where the ring-optical fiber beam illuminated CCD camera is set outside the right window and the optical signal receiver head is set outside the left window and linked with the photoelectric detecting controller, the optical fiber cold light source is linked with the CCD, scattering illumination emitter heads and photoelectric detecting controller through the optical fiber beam, CCD is linked with the photoelectric detecting controller through combined cable, and the photoelectric detecting controller is linked with the industrial control computer and real-time monitoring system. It adopts optical fiber illumination, to make real-time observation and monitoring, and shoot&record on the whole change course of synthesis and decomposition state of the natural gas hydrate in the balancing kettle in underwater narrow space and at high pressure and low temperature as well as make measurement & record on optical permeability and scattering properties.
Description
Technical field under in the of one
The present invention relates to a kind of Electro-Optical Sensor Set, particularly a kind of gas hydrate state variation simulated experiment Photodetection system.
Two background technologies
Gas hydrate are ice shape crystalline compounds that water and rock gas (methane etc.) produce under high pressure and cryogenic conditions, it is present in the deep-sea bottom in the ocean widely, its reserves are more much bigger than oil and natural gas, to be the main substitute of oil and natural gas in this century, also be that following strategy is stocked the energy.Therefore, detect with development of natural gas hydrate resource and have the important strategic meaning.When research and the plan of enforcement development of natural gas hydrate, because the geologic condition difference of various countries, the composition of gas hydrate and formation mechanism there are differences, thereby, in order to further investigate the generation and exploitation rule of grasping gas hydrate, U.S., day, Russia, the cryogenic high pressure laboratory that state has all set up gas hydrate such as add.Though the laboratory study achievement of gas hydrate is seen in already in relevant report, the visual research of gas hydrate state and phase transformation still is unrealized in the experimental study of these gas hydrate with detection, does not see relevant report.
Japan geologic examination (the Introduction to exploration research on gas hydrates inJapan of office, Yoshihisa Okuda, Bulletin of the Geological Survey ofJapan, 49 (10), 494 ~ 500,1998) in the gas hydrate analogue means, though transmittance strength test device is arranged, but what they adopted is that ordinary light source is as testing light source, but not optical fiber source, this system does not have the scatterometry means in addition, does not more have underwater miniature monitoring camera-shooting technological means; (the A setup forlight scattering studies of gas-hydrate formation kinetics of Russian Academy Of Sciences earth cryosphere research institute, A.N.Nesterov andV.V.Feklistov, Instruments and Experimental Techniques, 42 (2), 1999,265 ~ 269) light scattering device is arranged, can study the generation dynamics of hydrate, turbidity by the experiments of measuring system, determine that hydrate generates the size and the content of different times hydrate particle, its principle is similar to laser particle analyzer, and this Design of device temperature is-10 ~ 20 ℃, and pressure is 7Mpa.
Three summary of the invention
The object of the present invention is to provide a kind of have carry out visual shooting, record under water and to the simulated experiment Photodetection system of the gas hydrate state variation of light intensity transmission, scattering properties variation monitoring, be used for high pressure low temperature, with the water environment of the narrow and small difficulty of space structure, the synthetic change procedure with decomposing state of gas hydrate in the equilibrium still is carried out the test of visual Real Time Observation shooting record and light intensity transmission/scattering properties and phase transformation figure, thereby provide scientific basis with decomposition condition for studying the synthetic of gas hydrate.
The technical solution that realizes the object of the invention is: a kind of gas hydrate state variation simulated experiment Photodetection system, it is characterized in that: the high pressure equilibrium still is arranged in the temperature control water tank, high pressure equilibrium still upper end is provided with window and the stray illumination emitting head is set therein, about window respectively is set, the outer micro color ccd video camera that has 3 illumination emitter heads that is provided with of right window, left window is outer to be provided with and to be connected with optical fiber and to pass light signal on the light beam and receive head and be connected with the photodetection controller, the optical fiber cold light source passes light beam by Y shape optical fiber and is connected with ccd video camera and photodetection controller, the optical fiber cold light source passes light beam by Y shape optical fiber and is connected with stray illumination emitting head and photodetection controller, ccd video camera is connected with the photodetection controller by combination cable, the photodetection controller is connected with industrial computer and real-time monitoring system, and optical fiber passes light beam, combination cable and Y shape optical fiber pass light beam lower end arranged outside waterproof plastic sleeve pipe.
The present invention compared with prior art, its remarkable advantage is: adopted optical fiber source and flexible optical fibre lighting engineering, underwater miniature shooting recording technique, the water-tight structural design of the optical fiber sensing technology of light intensity transmission/scattering and complete machine, realized under water under the space structure condition of narrow and small difficulty, the synthetic overall process that changes with decomposing state of gas hydrate in the equilibrium still under the high pressure low temperature condition is carried out Real Time Observation to be monitored, shooting record and light intensity transmission, the survey record that scattering properties changes, and according to the light intensity transmission, scattering properties test curve rule can make things convenient for the phase transformation figure that obtains gas hydrate exactly.Wherein: the underwater miniature camera system adopts has flexible circumference bikini or multiple spot optical fibre ring bundle lighting system, solved in water under the small space structural condition and the coaxial difficult problem of illumination in the same way of miniature video camera system, shooting, video recording system have high definition, high fidelity, high capacity and function such as playback when accurately selecting, and have good result; The test circuit of light intensity transmission/scattering properties test macro adopts two-way (test light and reference light), two probe (eliminating the dark current influence), the anti-phase ratio amplifier of two-stage and exports advanced technology such as clamped protection; suppress the influence to measuring accuracy such as light-intensity variation, improved measuring accuracy.
Four description of drawings
Fig. 1 is that gas hydrate state variation simulated experiment Photodetection system of the present invention constitutes synoptic diagram.
Fig. 2 is that photodetection controller circuitry of the present invention system forms synoptic diagram.
Fig. 3 is the circuit diagram of photodetection controller of the present invention.
Five embodiments
In conjunction with Fig. 1, Fig. 2, Fig. 3, gas hydrate state variation simulated experiment Photodetection system of the present invention is by the micro color ccd video camera 2 that has 1 illumination of 3 annular optical fiber bundles, combination cable 3, optical fiber cold light source 7 and 8, Y shape optical fiber passes light beam 9 and 10, the illumination emitting head 4 of scattering light path, having light signal receives 6 optical fiber and passes light beam 11, photodetection controller 12, industrial computer 13, compositions such as real-time monitoring system 14 and waterproof plastic sleeve pipe 15, high pressure equilibrium still 5 is arranged in the temperature control water tank 16, high pressure equilibrium still 5 upper ends are provided with window 18, and stray illumination emitting head 4 is set therein, about window 19 respectively is set, 17, the right window 17 outer micro color ccd video cameras 2 that have 1 illumination of 3 annular optical fiber bundles that are provided with, left window 19 is outer to be provided with and to be connected with optical fiber and to pass light signal on the light beam 11 and receive 6, and be connected with photodetection controller 12, optical fiber cold light source 7 passes light beam 9 by Y shape optical fiber and is connected with ccd video camera 2 and photodetection controller 12, optical fiber cold light source 8 passes light beam 10 by Y shape optical fiber and is connected with stray illumination emitting head 4 and photodetection controller 12, ccd video camera 2 is connected with photodetection controller 12 by combination cable 3, photodetection controller 12 is connected with industrial computer 13 and real-time monitoring system 14, and optical fiber passes light beam 11, combination cable 3 and Y shape optical fiber pass light beam 9 lower end arranged outside waterproof plastic sleeve pipes 15.
Two two-way photosignal converter amplifier circuits, two ccd video camera control modules and power supply are wherein arranged in the photodetection controller 12, and industrial computer 13 is furnished with video capture card and data collecting card; Real time monitoring register system 14 is made up of digital hard disc video recorder and high resolution monitor.During system works, utilization has the waterproof plastic sleeve pipe 15 of excellent sealing and design of Sealing Structure and constitute the water-tight space between high pressure equilibrium still window and 3 annular optical fiber bundles 1 and stray illumination emitting head 4, light signal receives 6, make annular optical fiber bundle 1 that 3 fibre bundles form and micro color ccd video camera 2, Y shape optical fiber pass light beam 10 scattering light path illumination emitting head 4, have light signal and receive an optical fiber biography light beam 11 of 6 all each correspondingly is tightly connected at form 17,18,19 with the high pressure equilibrium still, and place temperature control water tank 16 jointly with high pressure equilibrium still 5.
The present invention adopts optical fiber cold light source 7 or 8 illuminations as the miniature video camera supervision, the white light that optical fiber cold light source 7 produces, pass light beam 9 by Y shape optical fiber and be transferred to the annular optical fiber bundle of forming by 3 fibre bundles 1 that is looped around around the pick-up lens 2, and by imaging region in the high pressure equilibrium still window 17 illumination high pressure equilibrium stills 5, or the white light that produces by optical fiber cold light source 8, pass light beam 10 through Y shape optical fiber and be transferred to scattered illumination emitting head 4, and by the form 18 above the high pressure equilibrium still, the observed zone in the illumination high pressure equilibrium still.In the high pressure equilibrium still 5, illuminated gas hydrate liquid or sediment are imaged on the ccd video camera target surface through micro color ccd video camera 2, ccd video camera converts optical imagery to electric signal, be transferred to CCD controller in the photodetection controller 12 by combination cable 3, CCD controller output two-path video signal: the one tunnel send the digital hard disc video recorder vision signal input port of real time monitoring register system 14, be used for real-time video record, and show by the high-resolution color monitor; The vision signal input port of the video image acquisition system of industrial computer 13 is sent on another road, and the image that is used for industrial computer shows and acquisition and recording.
The basic mechanical design feature index of shooting and monitoring system is as follows: a. linear field＞φ 21mm b. viewing distance: camera lens A is used for transparent water, and its position is apart from visor inside surface 6cm; Camera lens B is used for sediment, and its position is positioned near the visor inside surface; C. vision enlargement ratio＞10 *; D. find smallest particles yardstick＜20 μ m; E. micro color ccd video camera target surface 1/2 ", CCD pixel element 752 (H) * 582 (V); F. digital hard disc video recorder recording compressed form: MPEG-II; G. real time record, writing time, length was by hard drive space decision (about 21 hours of 40G hard disk; About 31 hours of 60G hard disk); H. colour picture monitor resolution 550TVL.
In light intensity transmission test macro, the white light that optical fiber cold light source 7 produces is after being coupled to Y shape optical fiber biography light beam 9, and one road signal is transferred to 3 annular optical fiber bundle 1 emission coefficients, produces the gas hydrate that test beams changes by P, T condition; Light signal receives 6 and surveys the variation that the optical signal transmissive power that receives can reflect the gas hydrate transmissison characteristic by high pressure equilibrium still window 19.
In the light intensity scattering test macro, the white light that optical fiber cold light source 8 produces is after being coupled to Y shape optical fiber biography light beam 10, and one tunnel optical signal transmission produces the gas hydrate that the test beams orthogonal illumination changes to P, T condition to beam divergence illumination emitting head 4; Light signal receives the variation that 6 light signal powers that receive by 19 mouthfuls of detections of high pressure equilibrium still window can reflect the gas hydrate light scattering characteristic.
Light signal reception 6 transmission that receive or scattered light signal are transferred to photodetection controller 12 by optical fiber biography light beam 11, through photodetector reception, conversion and signal Processing, produce industrial computer A/D and change desired voltage signal, send the industrial computer data acquisition, obtain transmission/scattered light intensity data; Another road reference optical signal that Y shape optical fiber passes light beam 9 or 10 also is transferred to photodetection controller 12, through photodetector reception, conversion and signal Processing, produce industrial computer A/D and change desired voltage signal, send the industrial computer data acquisition, obtain reference light light intensity numerical value; After industrial computer is handled, can obtain time dependent data of transmission/scattering and family curve in the gas hydrate state change process.
The characteristics of light intensity transmission/scattering test macro are: the variation according to the tested object situation has transmission, the scattering dual mode is available; test circuit adopts two-way (test light and reference light), two probe (eliminating the dark current influence), the anti-phase ratio amplifier of two-stage and exports advanced technology such as clamped protection, suppressed the influence to measuring accuracy such as light-intensity variation.
Light intensity transmission/scattering test macro technical performance index: a. error: ± 1%; B. the single data record size is greater than 6000 time points; C. the highest measurement frequency is greater than 10 times/second;
Claims (4)
1, a kind of gas hydrate state variation simulated experiment Photodetection system, it is characterized in that: high pressure equilibrium still [5] is arranged in the temperature control water tank [16], high pressure equilibrium still [5] upper end is provided with window [18] and stray illumination emitting head [4] is set therein, about window [19 respectively is set, 17], the outer micro color ccd video camera [2] that has 3 annular optical fiber bundles [1] illumination that is provided with of right window [17], left window [19] is outer to be provided with and to be connected with optical fiber and to pass light signal on the light beam [11] and receive head [6] and be connected with photodetection controller [12], optical fiber cold light source [7] passes light beam [9] by Y shape optical fiber and is connected with micro color ccd video camera [2] and photodetection controller [12], optical fiber cold light source [8] passes light beam [10] by Y shape optical fiber and is connected with stray illumination emitting head [4] and photodetection controller [12], micro color ccd video camera [2] is connected with photodetection controller [12] by combination cable [3], photodetection controller [12] is connected with industrial computer [13] and real-time monitoring system [14], and optical fiber passes light beam [11], combination cable [3] and Y shape optical fiber pass light beam [9] lower end arranged outside waterproof plastic sleeve pipe [15].
2, gas hydrate state variation simulated experiment Photodetection system according to claim 1 is characterized in that photodetection controller [12] is provided with two two-way photosignal converter amplifier circuits, two ccd video camera control modules and power supply.
3, gas hydrate state variation simulated experiment Photodetection system according to claim 1 and 2 is characterized in that industrial computer [13] is furnished with video capture card and data collecting card.
4,, it is characterized in that real time monitoring register system [14] is made up of digital hard disc video recorder and high resolution monitor according to the described gas hydrate state variation of claim 1-3 simulated experiment Photodetection system.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 03112892 CN1223845C (en) | 2003-02-28 | 2003-02-28 | Natural gas hydrate state change simulation experiment photodetection system |
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| CN 03112892 CN1223845C (en) | 2003-02-28 | 2003-02-28 | Natural gas hydrate state change simulation experiment photodetection system |
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| CN1525157A true CN1525157A (en) | 2004-09-01 |
| CN1223845C CN1223845C (en) | 2005-10-19 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101055276B (en) * | 2007-02-14 | 2011-08-24 | 中国科学院广州能源研究所 | Natural gas hydrate phase balance emulation experiment device |
| CN102384835A (en) * | 2011-08-18 | 2012-03-21 | 中国海洋石油总公司 | Device for detecting flow characteristics of hydrate slurry in pipeline |
| CN102954939A (en) * | 2011-08-17 | 2013-03-06 | 通用电气公司 | Method and system for detecting moisture in natural gas |
| CN103869046A (en) * | 2014-04-08 | 2014-06-18 | 中国海洋大学 | Simulation and observation system for submarine landslide caused by natural gas hydrate decomposition |
| JP2016057281A (en) * | 2014-09-09 | 2016-04-21 | 三井造船株式会社 | Property evaluation method and property evaluation device of gas-hydrate |
| CN108130146A (en) * | 2017-12-07 | 2018-06-08 | 中国科学院广州能源研究所 | A kind of gas hydrate crystal culture apparatus |
| US10024787B2 (en) | 2014-05-15 | 2018-07-17 | General Electric Company | System and method for measuring concentration of a trace gas in a gas mixture |
-
2003
- 2003-02-28 CN CN 03112892 patent/CN1223845C/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101055276B (en) * | 2007-02-14 | 2011-08-24 | 中国科学院广州能源研究所 | Natural gas hydrate phase balance emulation experiment device |
| CN102954939A (en) * | 2011-08-17 | 2013-03-06 | 通用电气公司 | Method and system for detecting moisture in natural gas |
| CN102954939B (en) * | 2011-08-17 | 2016-12-21 | 通用电气公司 | The method and system of the moisture in detection natural gas |
| CN102384835A (en) * | 2011-08-18 | 2012-03-21 | 中国海洋石油总公司 | Device for detecting flow characteristics of hydrate slurry in pipeline |
| CN103869046A (en) * | 2014-04-08 | 2014-06-18 | 中国海洋大学 | Simulation and observation system for submarine landslide caused by natural gas hydrate decomposition |
| CN103869046B (en) * | 2014-04-08 | 2016-01-13 | 中国海洋大学 | The submarine slide simulation that gas hydrate dissociation causes and recording geometry |
| US10024787B2 (en) | 2014-05-15 | 2018-07-17 | General Electric Company | System and method for measuring concentration of a trace gas in a gas mixture |
| JP2016057281A (en) * | 2014-09-09 | 2016-04-21 | 三井造船株式会社 | Property evaluation method and property evaluation device of gas-hydrate |
| CN108130146A (en) * | 2017-12-07 | 2018-06-08 | 中国科学院广州能源研究所 | A kind of gas hydrate crystal culture apparatus |
| CN108130146B (en) * | 2017-12-07 | 2020-07-21 | 中国科学院广州能源研究所 | Gas hydrate crystal culture device |
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| CN1223845C (en) | 2005-10-19 |
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