CN2938032Y - Fibre-optical raster osmometer - Google Patents
Fibre-optical raster osmometer Download PDFInfo
- Publication number
- CN2938032Y CN2938032Y CN 200620021100 CN200620021100U CN2938032Y CN 2938032 Y CN2938032 Y CN 2938032Y CN 200620021100 CN200620021100 CN 200620021100 CN 200620021100 U CN200620021100 U CN 200620021100U CN 2938032 Y CN2938032 Y CN 2938032Y
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- Prior art keywords
- flat diaphragm
- housing
- utility
- grating
- model
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- Expired - Fee Related
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- Measuring Fluid Pressure (AREA)
Abstract
The utility model provides an osmometer of the fiber optic and grating. The shell of the utility model is composed of two parts. A flat diaphragm is arranged between the two parts of the shell. A permeable stone is arranged on the shell at one side of the flat diaphragm. A dowel is arranged on the flat diaphragm. The other side of the flat diaphragm is provided with an equal strength beam, whose two sides are pasted with the fiber optic and grating. The shell is provided with a fiber optic extraction component. The utility model takes advantage of the sensing characteristic of the fiber optic and grating and the deformation characteristic of the combination of the periphery fixed flat diaphragm and the elastic element---the equal strength beam. The utility model has advantages of compact structure, long-term stability, good durability and anti-electromagnetic interference.
Description
(1), technical field
The utility model relates to a kind of intellectual monitoring sensor.Specifically a kind of fiber-optic grating sensor that is used for seepage water pressure and temperature simultaneously measuring belongs to the optical fiber grating sensing field.
(2), background technology
Traditional osmometer can not satisfy requirements such as stability, permanance, distributed on-line data acquisition, osmotic pressure and temperature simultaneously measuring simultaneously.Fiber grating is a kind of sensing element of function admirable, no matter at technology maturity, or has all obtained the breakthrough of essence on the cost.The major advantage that fiber grating is used for osmometer is embodied in: good endurance; Moisture resistance is wet; Be not subjected to the interference of electromagnetic field, electrical insulating property is good; Both point measurement can be realized, also distributed measurement can be realized; Absolute measurement; But signal, data multipath transmission are convenient to be connected with computing machine, and signal attenuation is little on the unit length; Bandwidth, signal to noise ratio (S/N ratio) is high.In every monitoring of dam and highway soft foundation isolith geotechnique journey, require osmometer can observe the influence of the variation of seepage water pressure and environment temperature timely and accurately to infiltration hydraulic pressure, also be that temperature, infiltration hydraulic pressure can be measured simultaneously.At present seldom, and do not see relevant patent about the report of infiltration hydraulic pressure, the two simultaneously-measured fiber bragg grating osmometers of parameter of temperature.Therefore, fiber grating is carried out measuring seepage water pressure after the encapsulation process and temperature effect is the new direction that fiber grating is used.
(3), summary of the invention
The purpose of this utility model be to provide a kind of simple in structure, lay convenient, long-time stability are good, good endurance, can carry out the fiber bragg grating osmometer of seepage water pressure and temperature monitoring simultaneously.
The purpose of this utility model is achieved in that it comprises housing, housing is made up of two parts, flat diaphragm is installed between two housing sections, on the housing of flat diaphragm one side permeable stone is installed, transmission rod is installed on the flat diaphragm, the flat diaphragm opposite side is equipped with the beam of uniform strength, and the both sides of the beam of uniform strength are pasted with fiber grating, has optical fiber on the housing and draws member.
The utility model can also comprise some architectural features like this:
1, an end of the beam of uniform strength is fixed on the housing by pressing plate and trip bolt.
2, there is fluid sealant the junction of two housing sections.
The technical scheme that its technical matters that solves the utility model adopts is: when seepage water pressure was measured, seepage water pressure acted on circular flat diaphragm surface equably, made the bending of flat diaphragm generation amount of deflection; Flat diaphragm is converted into concentrated force with uniform pressure simultaneously, acts on beam of uniform strength free end by transmission rod, and the beam of uniform strength is deformed; Stick on the double optical fiber grating and the beam of uniform strength compatible deformation of beam of uniform strength upper and lower surface, centre wavelength changes.This moment, the using optical fibre grating (FBG) demodulator was measured its wavelength, and can try to achieve the seepage water pressure value with seepage water pressure-wavelength curve of demarcating in advance.For temperature compensation,, therefore, can realize temperature self-compensation fully by analyzing as can be known because this structure adopts the double optical fiber grating difference structure.Equally, when environment temperature was measured, two fiber gratings were under temperature effect, and centre wavelength is drifted about, and this moment, the using optical fibre grating (FBG) demodulator was measured its wavelength, and can try to achieve ambient temperature value with temperature-wavelength curve of demarcating in advance.
The beneficial effects of the utility model are that using optical fibre grating is measured seepage water pressure pressure, also has the function of temperature self-compensation function and measurement temperature.Made full use of the characteristic of fiber grating good endurance and good stability, had compact conformation, power transmission and clearly wait advantage.
(4) description of drawings
Accompanying drawing is the structural representation of embodiment of the present utility model.
(5), specific embodiments
For a more detailed description to the utility model for example below in conjunction with accompanying drawing:
Its structure is formed and comprised: by the double optical fiber grating 3 of adhesive bonds in the beam of uniform strength 10 upper and lower surfaces, sensor housing 1, optical fiber are drawn member 2, pressing plate 4, trip bolt 5, flat diaphragm 8, transmission rod 9 and permeable stone 7.Housing is made up of two parts, and flat diaphragm is installed between two housing sections, on the housing of flat diaphragm one side permeable stone is installed, transmission rod is installed on the flat diaphragm, the flat diaphragm opposite side is equipped with the beam of uniform strength, and the both sides of the beam of uniform strength are pasted with fiber grating, has optical fiber on the housing and draws member.One end of the beam of uniform strength is fixed on the housing by pressing plate and trip bolt.There is fluid sealant the junction of two housing sections.
Product of the present utility model can adopt such method to make: at first select for use with two fiber gratings that centre wavelength is identical in a collection of, use the contour performance tackifier of J133 two fiber gratings to be bonded in the upper and lower surface of the beam of uniform strength respectively, then the beam of uniform strength is installed on the housing with trip bolt, carry out the combination of flat diaphragm, transmission rod and housing simultaneously, evenly smear the high-durability fluid sealant on the surface of contact between flat diaphragm and the housing.Draw at sensor main body and optical fiber and screw screw thread after also evenly smearing the high-durability fluid sealant on the screw thread of member, guarantee sealing, connect the armouring optical cable at last, will notice that at this moment the optical fiber fairlead also will use the sealing of high-durability fluid sealant.
Claims (3)
1, a kind of fiber bragg grating osmometer, housing is made up of two parts, it is characterized in that: flat diaphragm is installed between two housing sections, on the housing of flat diaphragm one side permeable stone is installed, transmission rod is installed on the flat diaphragm, the flat diaphragm opposite side is equipped with the beam of uniform strength, and the both sides of the beam of uniform strength are pasted with fiber grating, has optical fiber on the housing and draws member.
2, fiber bragg grating osmometer according to claim 1 is characterized in that: an end of the beam of uniform strength is fixed on the housing by pressing plate and trip bolt.
3, fiber bragg grating osmometer according to claim 1 and 2 is characterized in that: there is fluid sealant the junction of two housing sections.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620021100 CN2938032Y (en) | 2006-06-26 | 2006-06-26 | Fibre-optical raster osmometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620021100 CN2938032Y (en) | 2006-06-26 | 2006-06-26 | Fibre-optical raster osmometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2938032Y true CN2938032Y (en) | 2007-08-22 |
Family
ID=38362061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620021100 Expired - Fee Related CN2938032Y (en) | 2006-06-26 | 2006-06-26 | Fibre-optical raster osmometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2938032Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101776473A (en) * | 2010-01-28 | 2010-07-14 | 昆明理工大学 | Differential strain type optical fiber Bragg raster-suspended belt scale |
| CN103542974A (en) * | 2013-10-24 | 2014-01-29 | 昆明理工大学 | Optical fiber Bragg optical grating piston-type rhombus osmotic pressure sensor and use method thereof |
| CN103644955A (en) * | 2013-12-03 | 2014-03-19 | 大连大学 | Differential-motion strain fiber Bragg grating suspension-type belt weigher |
| CN110579306A (en) * | 2019-09-17 | 2019-12-17 | 长江水利委员会长江科学院 | Vibrating wire type pressure sensor |
-
2006
- 2006-06-26 CN CN 200620021100 patent/CN2938032Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101776473A (en) * | 2010-01-28 | 2010-07-14 | 昆明理工大学 | Differential strain type optical fiber Bragg raster-suspended belt scale |
| CN103542974A (en) * | 2013-10-24 | 2014-01-29 | 昆明理工大学 | Optical fiber Bragg optical grating piston-type rhombus osmotic pressure sensor and use method thereof |
| CN103542974B (en) * | 2013-10-24 | 2016-01-20 | 昆明理工大学 | A kind of piston type diamond structure optical fiber Bragg raster osmotic pressure sensor and using method thereof |
| CN103644955A (en) * | 2013-12-03 | 2014-03-19 | 大连大学 | Differential-motion strain fiber Bragg grating suspension-type belt weigher |
| CN110579306A (en) * | 2019-09-17 | 2019-12-17 | 长江水利委员会长江科学院 | Vibrating wire type pressure sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070822 Termination date: 20100626 |