CN101408463B - Optical fiber grating static water level - Google Patents
Optical fiber grating static water level Download PDFInfo
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- CN101408463B CN101408463B CN2008102030608A CN200810203060A CN101408463B CN 101408463 B CN101408463 B CN 101408463B CN 2008102030608 A CN2008102030608 A CN 2008102030608A CN 200810203060 A CN200810203060 A CN 200810203060A CN 101408463 B CN101408463 B CN 101408463B
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- fiber grating
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- optical fiber
- water level
- static water
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Abstract
The invention relates to an optical fiber grating static force level which comprises a corrugated tube, an elastic beam, an optical fiber grating, a connector I, a connector II, an optical fiber grating temperature sensor, a screw tube, a limiter, a pontoon and an external cylinder. Compared with the prior art, the optical fiber grating static force level uses the theory that the reflection wavelength of the optical fiber grating varies with the change of the tensile force exerted on the grating, and obtains the change of the tensile force exerted on the fiber grating by monitoring the variance of the wavelength of light reflected by the optical fiber grating so as to calculate the buoyancy force exerted on the pontoon and the liquid level of the pontoon; the level of the liquid in the pontoon can be measured using the optical fiber grating with the characteristics; the structure also comprises an optical fiber grating temperature sensor which effectively monitors the temperature of the system to realize automatic temperature compensation; and the fiber grating static force level has the advantages of high precision of liquid level measurement, remote and real-time data reading, and simple and easy networking.
Description
Technical field
The present invention relates to the fiber grating sensing technology field, relate in particular to optical fiber grating static water level.
Background technology
Traditional hydrostatic level adopts traditional measurement modes such as pressure type, condenser type, float-type, all be based on electric sensor, antijamming capability is not strong, precision is low, serviceable life is short, networking capability is not strong, and dynamic property is not good, and shortcomings such as winding, obstruction, leakage, dielectric corrosion, maintenance inconvenience are arranged.
Summary of the invention
Purpose of the present invention is exactly in order to overcome the defective that above-mentioned prior art exists, to provide a kind of level gauging precision high optical fiber grating static water level.
Purpose of the present invention can be achieved through the following technical solutions: optical fiber grating static water level, it is characterized in that, this spirit-leveling instrument comprises corrugated tube, elastic beam, fiber grating, connector I, connector II, fiber-optical grating temperature sensor, threaded line pipe, stop, floating drum, urceolus, and described corrugated tube two ends are connected with connector I, connector II respectively; Described elastic beam is located in the corrugated tube, and an end is connected with connector I, and the other end is connected with threaded line pipe; Described connector II is connected with fiber-optical grating temperature sensor; Described fiber grating one end is connected with elastic beam, and the fiber grating welding in the other end and the fiber-optical grating temperature sensor is on connector II; Described connector II is fixed on floating drum bottom centre below, and described fiber-optical grating temperature sensor passes the aperture that is located at the floating drum bottom, puts in the cavity of floating drum; Described connector I is fixed on the top of urceolus bottom centre; Described threaded line pipe is connected with elastic beam, and passes the aperture that is located at outer tube bottom, stretches out beyond the outer tube bottom; Described outer tube bottom is provided with linker; Described stop is fastened between urceolus and the floating drum.
Weld with connector I, connector II respectively at described corrugated tube two ends, to guarantee its sealing.
Described stop is provided with interior snap ring, outer snap ring, and described interior snap ring is located at the stop inner edge, and described outer snap ring is located at the stop outer rim.
Described threaded line pipe is provided with the zeroing nut.
Described floating drum and urceolus are right cylinder or rectangular parallelepiped.
Described corrugated tube is that copper or stainless steel material are made.
Described stop is circle or rectangle.
Described stop is that copper or stainless steel material are made.
Compared with prior art, the present invention utilizes the reflection wavelength of fiber grating to change with the suffered tension variations of grating, by the catoptrical wavelength variable quantity of monitoring fiber grating, can obtain the variation of the suffered pulling force of fiber grating, calculate buoyancy and liquid level that floating drum is suffered thus; Utilize this characteristic to use fiber grating can measure the interior liquid level of floating drum; This structure comprises a fiber-optical grating temperature sensor simultaneously, and the temperature of this system is effectively monitored, and realizes auto thermal compensation; The precision height of level gauging, remote live reading of data, optical fiber grating static water level networking are simple.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the structural representation of stop of the present invention;
Fig. 3 is the connection diagram of stop of the present invention and interior snap ring, outer snap ring;
Fig. 4 is the connection diagram of connector I of the present invention, connector II and elastic beam and corrugated tube.
Embodiment
The present invention will be further described below in conjunction with specific embodiment.
Shown in Fig. 1～4, optical fiber grating static water level, this spirit-leveling instrument comprises corrugated tube 1, elastic beam 2, fiber grating 3, connector I4, connector II5, fiber-optical grating temperature sensor 6, threaded line pipe 7, stop 9, floating drum 12, urceolus 13, and described corrugated tube 1 two ends are connected with connector I4, connector II5 respectively; Described elastic beam 2 is located in the corrugated tube 1, and an end is connected with connector I4, and the other end is connected with threaded line pipe 7; Described connector II5 is connected with fiber-optical grating temperature sensor 6; Described fiber grating 3 one ends are connected with elastic beam 2, and fiber grating 18 weldings in the other end and the fiber-optical grating temperature sensor 6 are on connector II5; Described connector II5 is fixed on floating drum 12 bottom centre below, and described fiber-optical grating temperature sensor 6 passes the aperture that is located at floating drum 12 bottoms, puts in the cavity of floating drum 12; Described connector I4 is fixed on the top of urceolus 13 bottom centre; Described threaded line pipe 7 is connected with elastic beam 2, and passes the aperture that is located at urceolus 13 bottoms, stretches out beyond urceolus 13 bottoms; Described urceolus 13 bottoms are provided with linker 14; Described stop 9 is fastened between urceolus 13 and the floating drum 12.Weld with connector I4, connector II4 respectively at described corrugated tube 1 two ends, to guarantee its sealing.Described stop 9 is provided with interior snap ring 10, outer snap ring 11, and described interior snap ring 10 is located at stop 9 inner edges, and described outer snap ring 11 is located at stop 9 outer rims.Described threaded line pipe 7 is provided with zeroing nut 8.Described floating drum 12 is right cylinder or rectangular parallelepiped with urceolus 13.Described corrugated tube 1 is made for copper or stainless steel material.Described stop 9 is circle or rectangle.Described stop 9 is made for copper or stainless steel material.
The present invention utilizes the reflected light wavelength of fiber grating under action of pulling stress to move and calculates liquid level.The double optical fiber grating encapsulating structure comprise one have this sensor bulk of fiber-optical grating temperature sensor of degree of precision little, measuring accuracy is high.This makes this system not only simultaneously measuring liquid level and temperature, and can revise the influence of temperature to system automatically.According to connecting pipe principle, a plurality of optical fiber grating static water levels are communicated with the relative variation that can measure liquid level in each measuring point container, calculate the relative settlement amount of each point of trying to achieve thus for basic point.This system can with the various types of sensor networks based on Fiber Bragg Grating technology.
During work, sensor is fixed in substrate to be measured, apply pretension by regulating 8 pairs of fiber gratings 3 of zeroing nut, connector 14 is connected with other sensors by water pipe, according to law of connected vessels, inject liquid 16 in the sensor urceolus 13, liquid level 17 risings (or decline) in urceolus 13, the buoyancy that floating drum 12 is subjected to also increases (or reducing) stop 9 accordingly and links to each other with floating drum 12, make floating drum 12 horizontal directions not have displacement, and stop 9 designs for thin slice, the influence of the buoyancy of the suffered vertical direction of floating drum 12 is ignored, thereby increase (or reducing) pulling force, make the reflection wavelength of fiber grating 3 increase (or reducing) fiber grating 3.Just can obtain tested liquid level position by the wavelength change amount.
In order to eliminate the influence of temperature to sensor wavelength, this structure has been used the method for double grating 318, and this fiber grating group can realize the precise dose compensation.The specific implementation account form is as follows:
W3-W30-W18-W180
The test wavelength of W3---fiber grating 3
The wavelength at zero point of W30---fiber grating 3
The test wavelength of W18---fiber grating 18
The wavelength at zero point of W180---fiber grating 18
Wherein respectively comprise the wavelength variations that liquid level and temperature cause sensor in " W3-W30 " value, the wavelength variations of " W18-W180 " value for having only temperature that sensor is caused, temperature equates the wavelength variable quantity of two sections fiber gratings of sensor, so the wavelength variable quantity that both differences are liquid level change to be caused has weeded out the wavelength variable quantity of temperature on fiber grating.Can judge that by the positive negative value of result of calculation the liquid level of fluid to be measured rises or descends.Wherein because the wavelength of fiber grating 18 only is subjected to Temperature Influence, so the utility model can also be realized the measurement to environment temperature.
Claims (8)
1. optical fiber grating static water level, it is characterized in that, this spirit-leveling instrument comprises corrugated tube, elastic beam, first fiber grating, connector I, connector II, fiber-optical grating temperature sensor, threaded line pipe, stop, floating drum, urceolus, and described corrugated tube two ends are connected with connector I, connector II respectively; Described elastic beam is located in the corrugated tube, and an end is connected with connector I, and the other end is connected with threaded line pipe; Described connector II is connected with fiber-optical grating temperature sensor; Described first fiber grating, one end is connected with elastic beam, and the second fiber grating welding in the other end and the fiber-optical grating temperature sensor is on connector II; Described connector II is fixed on floating drum bottom centre below, and described fiber-optical grating temperature sensor passes the aperture that is located at the floating drum bottom, puts in the cavity of floating drum; Described connector I is fixed on the top of urceolus bottom centre; Described threaded line pipe is connected with elastic beam, and passes the aperture that is located at outer tube bottom, stretches out beyond the outer tube bottom; Described outer tube bottom is provided with linker; Described stop is fastened between urceolus and the floating drum.
2. optical fiber grating static water level according to claim 1 is characterized in that, weld with connector I, connector II respectively at described corrugated tube two ends, to guarantee its sealing.
3. optical fiber grating static water level according to claim 1 is characterized in that, described stop is provided with interior snap ring, outer snap ring, and described interior snap ring is located at the stop inner edge, and described outer snap ring is located at the stop outer rim.
4. optical fiber grating static water level according to claim 1 is characterized in that described threaded line pipe is provided with the zeroing nut.
5. optical fiber grating static water level according to claim 1 is characterized in that, described floating drum and urceolus are right cylinder or rectangular parallelepiped.
6. optical fiber grating static water level according to claim 1 is characterized in that, described corrugated tube is that copper or stainless steel material are made.
7. optical fiber grating static water level according to claim 1 is characterized in that, described stop is circle or rectangle.
8. optical fiber grating static water level according to claim 1 is characterized in that, described stop is that copper or stainless steel material are made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102030608A CN101408463B (en) | 2008-11-20 | 2008-11-20 | Optical fiber grating static water level |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102030608A CN101408463B (en) | 2008-11-20 | 2008-11-20 | Optical fiber grating static water level |
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| Publication Number | Publication Date |
|---|---|
| CN101408463A CN101408463A (en) | 2009-04-15 |
| CN101408463B true CN101408463B (en) | 2010-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008102030608A Expired - Fee Related CN101408463B (en) | 2008-11-20 | 2008-11-20 | Optical fiber grating static water level |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101718544B (en) * | 2009-11-25 | 2011-12-21 | 南京基泰土木工程仪器有限公司 | static level monitoring system |
| CN102155934B (en) * | 2010-02-12 | 2014-12-24 | 宋启宽 | Optical fiber static water level gauge |
| CN102288261B (en) * | 2011-07-19 | 2012-12-05 | 赵恩国 | Floating pontoon type fiber liquid level meter |
| CN102506818B (en) * | 2011-11-16 | 2013-09-11 | 上海森首光电科技有限公司 | Micro displacement guiding device |
| CN102607523B (en) * | 2012-03-29 | 2014-04-09 | 华中科技大学 | Laser beat frequency sensing technology-based high-precision inclinator and measurement method |
| CN102768094B (en) * | 2012-08-08 | 2017-11-21 | 上海森首光电科技有限公司 | A kind of fiber bragg grating pressure sensor |
| CN104792369A (en) * | 2015-04-30 | 2015-07-22 | 中铁工程装备集团有限公司 | Wireless detecting device for rotating speed and abrasion of hobbing cutter of shield machine |
| CN110274655A (en) * | 2018-03-13 | 2019-09-24 | 中国石油化工股份有限公司 | A kind of fibre optic liquid level sensor for the monitoring of floating roof tank floating plate hydrops |
| CN113959490B (en) * | 2021-10-20 | 2022-08-05 | 山东大学 | Water level and water temperature monitoring system based on fiber bragg grating |
| CN113959403A (en) * | 2021-10-21 | 2022-01-21 | 上海朝辉压力仪器有限公司 | Temperature compensation method of level gauge |
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- 2008-11-20 CN CN2008102030608A patent/CN101408463B/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shanghai Sensorlead Co.,Ltd. Assignor: Cao Chungeng Contract fulfillment period: 2008.10.23 to 2013.10.22 contract change Contract record no.: 2009310000120 Denomination of invention: Optical fiber grating static water level License type: Exclusive license Record date: 2009.7.8 |
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| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.10.23 TO 2013.10.22; CHANGE OF CONTRACT Name of requester: SHANGHAI SENSORLEAD CO., LTD. Effective date: 20090708 |
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| C14 | Grant of patent or utility model | ||
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| ASS | Succession or assignment of patent right |
Owner name: SHANGHAI SENSHOU PHOTOELECTRIC TECHNOLOGY CO., LTD Free format text: FORMER OWNER: CAO CHUNGENG Effective date: 20110415 |
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| C41 | Transfer of patent application or patent right or utility model | ||
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Free format text: CORRECT: ADDRESS; FROM: 200233 5/F, TOWER A, NO. 388, YINDU ROAD, XUHUI DISTRICT, SHANGHAI TO: 200231 5/F, BUILDING 1, NO. 388, YINDU ROAD, XUHUI DISTRICT, SHANGHAI |
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| TR01 | Transfer of patent right |
Effective date of registration: 20110415 Address after: 200231 Shanghai city Xuhui District Yindu Road No. 388, No. 1 Building 5 layer Patentee after: Shanghai Sensorlead Co.,Ltd. Address before: 200233 Shanghai city Xuhui District Yindu Road, 388 block A No. 5 Patentee before: Cao Chungeng |
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| C17 | Cessation of patent right | ||
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Granted publication date: 20101201 Termination date: 20131120 |