CN201043905Y - Optical fiber grating percolation gauge - Google Patents
Optical fiber grating percolation gauge Download PDFInfo
- Publication number
- CN201043905Y CN201043905Y CNU2007200206828U CN200720020682U CN201043905Y CN 201043905 Y CN201043905 Y CN 201043905Y CN U2007200206828 U CNU2007200206828 U CN U2007200206828U CN 200720020682 U CN200720020682 U CN 200720020682U CN 201043905 Y CN201043905 Y CN 201043905Y
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- China
- Prior art keywords
- optical fiber
- box body
- pressure
- films
- grids
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- Expired - Fee Related
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Abstract
The utility model relates to a fiber grating osmometer, which comprises a box body, grids, supporting plates, films and optical fiber raster; wherein, the bottom of the box body is provided with the grids; the interior of the box body is provided with the supporting plates; the films are arranged on the supporting plates; an optical raster sensor is fixedly arranged on the films; the optical fiber raster sensor is connected with the optical fiber to connect with an optical signal demodulating and processing device. When using the utility model, the box body is put into a part that is needed to measure. When water enters into the box body through the grids at the bottom of the box body, the water produces pressure to the supporting plates; the pressure is transmitted to the optical fiber grids through the films, and then the optical fiber grids transmit the signal into the optical signal processing device to analyze the deformation of the pressure films, so as to get such parameter values as water pressure (the height of a water level). The utility model relates to an optical pressure sensor and has the advantages of simple structure, high sensitivity, large action extent, convenient use, easy net making, stability and reliability, no disturbance from electromagnetic field and no influence from outer environment.
Description
Technical field
The utility model relates to a kind of osmometer, specifically a kind of fiber bragg grating osmometer that is applied to water conservancy, river and dam body water pressure, height of water level, uplift pressure detection.
Background technology
We know, the sensor majority that the height of measurement water level, pressure use aspect water conservancy is a vibrating string type sensor at present, ultimate principle is to utilize hot-wire coil to produce electric magnetization, make vibratory string by its natural frequency vibration, thereby the tension force that changes vibratory string obtains different vibration frequencies.Because the residing work under bad environment of electromagnetic sensor, various interference are big, all cannot guarantee life-span of the electromagnetic sensor of type vibration wire, resistance strain gage, the flexible equal pressure class of magnetic, reliability, degree of accuracy etc., more are unfavorable for the long-term health monitoring.
Summary of the invention
The utility model is for overcoming above-mentioned the deficiencies in the prior art, and a kind of simple in structure, easy to use, fiber bragg grating osmometer of measuring accurately, not being affected by the external environment is provided.
The purpose of this utility model is to adopt following technical proposals to realize: a kind of fiber bragg grating osmometer, comprise casing, grid, support plate, diaphragm and fiber grating, bottom half is provided with grid, box house is provided with support plate, support plate is provided with diaphragm, stickup installs and fixes fiber grating on the diaphragm, and fiber grating is connected with light signal demodulation process device.
Described diaphragm is made by the elastic deformation material, is vacuum above the casing interior diaphragm, is communicated with water below, experiences the variation of water pressure and water level height.
The utility model adopts said structure, during use casing put into required sites measured, water enters in the casing through the grid of bottom half, support plate is produced a pressure, pressure is delivered on the fiber grating through diaphragm, fiber grating connects optical fiber and passes the signal along in the light signal demodulation process device again, analyzes parameter values such as concrete water pressure, height of water level.Bottom half is provided with grid, can prevent that foreign matter from entering in the casing, influences measured value, and the serviceable life of protection instrument.The utlity model has advantages such as influence simple in structure, easy to use, that measurement accurately, is not subjected to external environment.
Light signal demodulation process device described in the utility model is existing equipment, does not repeat them here.
Description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is an experiment test curve map of the present utility model.
Wherein 1. casings, 2. fiber grating, 3. diaphragm, 4. support plate, 5. grid, 6. optical fiber.
Embodiment
Below in conjunction with drawings and Examples the utility model is further specified.
As shown in Figure 1, casing 1 bottom is provided with grid 5, can prevent that foreign matter from entering the casing 1 interior measured value that influences, and the serviceable life of protection instrument.Casing 1 inside is provided with support plate 4, and support plate 4 is provided with the diaphragm of being made by the elastic deformation material 3, is vacuum above casing 1 interior diaphragm 3, is communicated with water below, can experience the variation of water pressure and water level height.Install and fix optical fiber grating sensing 2 on the diaphragm 3, fiber grating 2 connects optical fiber 6, and optical fiber 6 is connected with light signal demodulation process device.
During use, casing 1 is put into required sites measured, water enters in the casing 1 through the grid 5 of casing 1 bottom, pressure-sensitive diaphragm on the support plate 4 is produced a pressure, diaphragm 3 distortion are delivered on the fiber grating 2, the distortion of fiber grating 2 sensings passes the signal along in the light signal processing device by connecting optical fiber 6, analyzes water pressure, the bottom half parameter values such as vertical height of water level apart from the water surface.
As shown in Figure 2, horizontal ordinate is a time counting, and unit second, ordinate is a Fiber Bragg Grating FBG along with the rising of water level reduces the variation of (reduction of the rising of water pressure just) centre wavelength, and the change of centre wavelength promptly is the variation of grating inducedstress strain.The height that can find out water level from curve changes, and all causes the variation of the stress that grating is surveyed very delicately.This transducer sensitivity height, range ability is big, and anti-electromagnetic interference (EMI) is durable.
Claims (2)
1. fiber bragg grating osmometer, it is characterized in that: comprise casing, grid, support plate, diaphragm and fiber grating, bottom half is provided with grid, box house is provided with support plate, support plate is provided with diaphragm, install and fix fiber grating on the diaphragm, optical fiber grating sensing connects optical fiber and is connected with light signal demodulation process device.
2. according to the described fiber bragg grating osmometer of claim 1, it is characterized in that: described diaphragm is made by the elastic deformation material, is vacuum above the casing interior diaphragm, is communicated with water below.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200206828U CN201043905Y (en) | 2007-04-29 | 2007-04-29 | Optical fiber grating percolation gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200206828U CN201043905Y (en) | 2007-04-29 | 2007-04-29 | Optical fiber grating percolation gauge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201043905Y true CN201043905Y (en) | 2008-04-02 |
Family
ID=39258798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200206828U Expired - Fee Related CN201043905Y (en) | 2007-04-29 | 2007-04-29 | Optical fiber grating percolation gauge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201043905Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101782443B (en) * | 2010-01-19 | 2012-03-21 | 山东科技大学 | Full-mechanized hydraulic support fiber bragg grating pressure sensor |
| CN104081108A (en) * | 2011-10-24 | 2014-10-01 | 李明燮 | Apparatus and method for measuring the sloshing in the cargo tank of a liquefied natural gas carrier |
| CN107167280A (en) * | 2017-04-27 | 2017-09-15 | 太原理工大学 | A kind of measuring method of water level and pore water pressure fiber-optic grating sensor |
| CN110271786A (en) * | 2018-03-13 | 2019-09-24 | 中国石油化工股份有限公司 | A kind of floating roof tank floating warehouse hydrops monitoring sensor and floating warehouse on-Line Monitor Device |
-
2007
- 2007-04-29 CN CNU2007200206828U patent/CN201043905Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101782443B (en) * | 2010-01-19 | 2012-03-21 | 山东科技大学 | Full-mechanized hydraulic support fiber bragg grating pressure sensor |
| CN104081108A (en) * | 2011-10-24 | 2014-10-01 | 李明燮 | Apparatus and method for measuring the sloshing in the cargo tank of a liquefied natural gas carrier |
| CN104081108B (en) * | 2011-10-24 | 2016-12-21 | 李明燮 | The measurement apparatus of sloshing phenomenon and method in liquified natural gas carrier (LNGC) cargo container |
| US9709389B2 (en) | 2011-10-24 | 2017-07-18 | Michael Myungsub Lee | Apparatus and method for measuring the sloshing in the cargo tank of a liquefied natural gas carrier |
| CN107061990A (en) * | 2011-10-24 | 2017-08-18 | 李明燮 | The measurement apparatus of sloshing phenomenon in liquified natural gas carrier (LNGC) cargo container |
| CN107167280A (en) * | 2017-04-27 | 2017-09-15 | 太原理工大学 | A kind of measuring method of water level and pore water pressure fiber-optic grating sensor |
| CN110271786A (en) * | 2018-03-13 | 2019-09-24 | 中国石油化工股份有限公司 | A kind of floating roof tank floating warehouse hydrops monitoring sensor and floating warehouse on-Line Monitor Device |
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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: 20080402 |