CN201561793U - Intensity demodulation type fiber grating weightometer - Google Patents
Intensity demodulation type fiber grating weightometer Download PDFInfo
- Publication number
- CN201561793U CN201561793U CN2009202948605U CN200920294860U CN201561793U CN 201561793 U CN201561793 U CN 201561793U CN 2009202948605 U CN2009202948605 U CN 2009202948605U CN 200920294860 U CN200920294860 U CN 200920294860U CN 201561793 U CN201561793 U CN 201561793U
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- round platform
- fiber grating
- objective table
- weightometer
- coupler
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Abstract
The utility model relates to an intensity demodulation type fiber grating weightometer. The manufacturing cost of measurement equipment for a traditional fiber grating sensor is high, the measurement reaction time is long, and the measurement speed is low. The intensity demodulation type fiber grating weightometer comprises a wideband light source, an optical detector, a coupler, a round platform, a fiber grating, a bracket, an objective table and a tripodal disk base. The bottom surface at one end of the sheet strip-shaped objective table is fixedly arranged on the top surface of the round platform, and the bracket is vertically and fixedly arranged on the edge of the other end of the objective table. The bottom surface of the round platform is matched with the tripodal disk base; the fiber grating is arranged in the round platform made of elastic basis materials along the medial axis of the round platform; an initial end of the fiber grating is positioned on the top surface of the round platform, and a tail end of the fiber grating is positioned on the bottom surface of the round platform and connected with a detection end of the coupler through optical fibers; an input end of the coupler is connected with the wideband light source in an optical manner; and an output end of the coupler is connected with the optical detector in an optical manner. The intensity demodulation type fiber grating weightometer integrates the functions of sensing and demodulation, detects the luminous power directly through PD (Potential Difference) obtained from the optical detector, and has low requirements on back end equipment.
Description
Technical field
The utility model belongs to technical field of optical fiber sensing, relates to a kind of intensity demodulation type fiber grating poidometer.
Background technology
Fibre Optical Sensor is compared with traditional sensor, and Fibre Optical Sensor has unique advantage: highly sensitive, in light weight, volume is little, anti-electromagnetic interference (EMI), corrosion-resistant, essential safety.Because Fibre Optical Sensor is to utilize light wave transmissions information, and optical fiber is electrical isolation, corrosion resistant transmission medium, and this makes it can be used for strong electromagnetic such as various large-scale electromechanics, petrochemical complex, mine and rugged surroundings such as inflammable and explosive easily and effectively.Compare the sensor numerous with other, the Fibre Optical Sensor volume is little, be fit to embedded structure, easy for installation, plurality of advantages such as detection sensitivity is high, the life-span is long, be not subject to external interference, anti-height (low) is warm, corrosion-resistant.As above advantage in view of Fibre Optical Sensor, being of wide application of Fibre Optical Sensor, all key areas and the daily life that almost relate to national economy, especially can in rugged surroundings, use safely and effectively, solve the technical barrier that many industries exist for many years always, had the very big market demand.
In recent years, fiber-optic grating sensor is more and more paid attention to by people.The principle of work of this novel sensor is, the variation of measured parameter is converted to the variation of fiber grating operation wavelength, and the operation wavelength by the detection fiber grating changes the size of knowing measured parameter.The advantages such as the common antijamming capability of other type fiber sensor is strong except having for fiber-optic grating sensor, good reliability, corrosion-resistant, Sefe antiexplosion, volume are little, in light weight, also have coded system reliable, be easy to multiplexing and distinct advantages such as networking.But traditional fiber-optic grating sensor measuring system of utilizing wavelength measurement involves great expense, and measurement need be carried out length scanning, so the reaction time is long, and measuring speed is slow, can not be used for measuring at a high speed and monitoring in real time.People such as Jiang Desheng propose to utilize identical two chirped fiber gratings series connection of reflectance spectrum to carry out the sensing and demodulating strain, still, and this system architecture complexity, and need two chirped fiber gratings, the complicacy of the structure of increase.
Summary of the invention
The utility model provides a kind of practical application that is applicable at the deficiencies in the prior art, has than wide operating range, and simple in structure, intensity demodulation type fiber grating poidometer cheaply.
The utility model comprises wideband light source, photo-detector, coupling mechanism, round platform, fiber grating, support, objective table, tripod disk pedestal.The objective table one bottom face of sheet strip and the end face of round platform fixedly install, and objective table other end edge vertical fixing is provided with support.The bottom surface of round platform cooperates with tripod disk pedestal, fiber grating is arranged in the flexible base material round platform along the axis of round platform, fiber grating top is positioned at the end face of round platform, the fiber grating end is positioned at the bottom surface of round platform and is connected with the test side of coupling mechanism by optical fiber, the input end of coupling mechanism is connected with wideband light source light, and the output terminal of coupling mechanism is connected with light detector.
The bottom surface radius of described round platform is at least more than the twice of end face radius of round platform.
The advantage that the utility model had:
1. whole poidometer is only used an ordinary optic fibre grating.This poidometer integrates " sensing " and " demodulation " function, to luminous power, requires low to rear end equipment by photo-detector PD direct detection;
2. utilize frustum cone structure, gravity is changed into the variable quantity of fiber grating reflectance spectrum bandwidth, survey by PD then and obtain optical power change, reach the purpose of intensity demodulation, successfully solved the high drawback of Wavelength demodulation cost.
3. the measured object of Different Weight scope can place the diverse location on the objective table, thereby the position that heavy more measured object is placed on more away from the round platform center enlarges whole measurement device scope.
4. play the effect of protection grating with elastomeric polymer packaged fiber grating.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described.
As shown in Figure 1, intensity demodulation type fiber grating poidometer comprises support 1, objective table 2, fiber grating 3, round platform 4, tripod disk pedestal 5, coupling mechanism 6, wideband light source 7, photo-detector 8.
Fiber grating 3 adopts the long fiber grating of common 3cm.Be packaged into round platform 4 with elastomeric polymer, or fiber grating 3 is embedded in the flexible base material round platform 4.Guarantee that fiber grating 3 is positioned at round platform 4 shaft core positions.
Round platform 4 is an elastomeric polymer, and the bottom surface radius of round platform 4 is at least more than the twice of end face radius of round platform.Fiber grating 3 is embedded in the flexible base material round platform 4, and allow it be positioned at the elastomeric center of truncated cone-shaped, round platform 4 and fiber grating 3 are formed " elastic body and fiber grating complex ", hereinafter to be referred as complex.
The objective table 2 one bottom faces of sheet strip and the end face of round platform 4 fixedly install, and objective table 2 other end edge vertical fixing are provided with support 1.The bottom surface of round platform 4 cooperates with tripod disk pedestal 5.Supporting three of two supports 1 of objective table 2 and tripod disk pedestal 5 fits well at grade.The measured object of Different Weight scope can place the diverse location on the objective table 2, and measured object is heavy more, thereby the position that then is positioned over more away from the round platform center enlarges whole measurement device scope.
Tripod disk pedestal 5 centers are equipped with an aperture, fiber grating 3 is arranged in the flexible base material round platform 4 along the axis of round platform, fiber grating 3 tops are positioned at the end face of round platform 4, fiber grating 3 ends are positioned at the bottom surface of round platform 4 and are connected with the test side of coupling mechanism 6 by optical fiber, the aperture that passes tripod disk 5, the input end of coupling mechanism 6 is connected with wideband light source 7 light, and the output terminal of coupling mechanism 6 is connected with photo-detector 8 light.
Claims (2)
1. intensity demodulation type fiber grating poidometer, comprise wideband light source, photo-detector, coupling mechanism, round platform, fiber grating, support, objective table and tripod disk pedestal, it is characterized in that: the objective table one bottom face of sheet strip and the end face of round platform fixedly install, and objective table other end edge vertical fixing is provided with support; The bottom surface of round platform cooperates with tripod disk pedestal, fiber grating is arranged in the flexible base material round platform along the axis of round platform, fiber grating top is positioned at the end face of round platform, the fiber grating end is positioned at the bottom surface of round platform and is connected with the test side of coupling mechanism by optical fiber, the input end of coupling mechanism is connected with wideband light source light, and the output terminal of coupling mechanism is connected with light detector.
2. intensity demodulation type fiber grating poidometer according to claim 1 is characterized in that: the bottom surface radius of described round platform is at least more than the twice of end face radius of round platform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202948605U CN201561793U (en) | 2009-12-18 | 2009-12-18 | Intensity demodulation type fiber grating weightometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202948605U CN201561793U (en) | 2009-12-18 | 2009-12-18 | Intensity demodulation type fiber grating weightometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201561793U true CN201561793U (en) | 2010-08-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202948605U Expired - Fee Related CN201561793U (en) | 2009-12-18 | 2009-12-18 | Intensity demodulation type fiber grating weightometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201561793U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102914356A (en) * | 2012-09-19 | 2013-02-06 | 武汉理工光科股份有限公司 | Light intensity demodulating system and method based on non-uniform spectrum |
| CN109084869A (en) * | 2018-08-01 | 2018-12-25 | 桂林电子科技大学 | High-precision optical fiber balance system |
-
2009
- 2009-12-18 CN CN2009202948605U patent/CN201561793U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102914356A (en) * | 2012-09-19 | 2013-02-06 | 武汉理工光科股份有限公司 | Light intensity demodulating system and method based on non-uniform spectrum |
| CN109084869A (en) * | 2018-08-01 | 2018-12-25 | 桂林电子科技大学 | High-precision optical fiber balance system |
| CN109084869B (en) * | 2018-08-01 | 2023-12-19 | 桂林电子科技大学 | High-precision optical fiber balance system |
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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: 20100825 Termination date: 20101218 |