CN202631165U - Reflective pressure sensor - Google Patents
Reflective pressure sensor Download PDFInfo
- Publication number
- CN202631165U CN202631165U CN 201220244739 CN201220244739U CN202631165U CN 202631165 U CN202631165 U CN 202631165U CN 201220244739 CN201220244739 CN 201220244739 CN 201220244739 U CN201220244739 U CN 201220244739U CN 202631165 U CN202631165 U CN 202631165U
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- fiber grating
- metal
- mold body
- optical fiber
- lower mold
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Abstract
The utility model discloses a reflective pressure sensor, which comprises a metal mold, metal pressing pieces, elastomer materials and an inclined fiber grating, wherein the metal mold is provided with a through hole, and the metal pressing piece, the elastomer material, the inclined fiber grating, the elastomer material and the metal pressing piece, which are overlapped in sequence, are embedded in the through hole; the metal mold is divided into an upper mold body and a lower mold body, the upper mold body and the lower mold body are embedded and spliced, a via hole is arranged on the lateral surface of the upper mold body, the lower mold body is provided with a groove, the inclined fiber grating penetrates through the via hole and is arranged on the upper mold body through a protective jacket, and meanwhile, the inclined fiber grating is fixed in the groove of the lower mold body; the end of the inclined fiber grating,, which is located in the groove of the lower mold body, is plated with a metal film so as to form a reflector, and the other end of the inclined fiber grating is connected to a system. Through the manner, the reflective pressure sensor, provided by the utility model, has the advantages of convenience for production, compact structure and flexible application, and is suitable for requirements of actual engineering projects.
Description
Technical field
The utility model relates to a kind of sensor, particularly relates to a kind of reflective pressure transducer.
Background technology
Fiber grating is because advantage such as its high sensitivity, anti-electromagnetic interference (EMI), remote recording and many sensings be multiplexing is widely used in monitoring structural health conditions such as buildings, bridge, and wherein the sensing for transverse pressure is one of research focus.Existing based on fiber grating transverse pressure principle of sensors be mostly according to grating when the pressure that receives radially; Because photoelastic effect makes the mode refractive index of xsect vertical direction change; Produce birefringence effect, thereby cause the bragg wavelength of grating to split into two peaks.Through measuring the wavelength interval at two division peaks, can measure the transverse pressure that grating receives.But have very big Young modulus owing to constitute the quartz material of optical fiber, therefore two division spikes are long very little at interval, so not high based on the transverse pressure transducer sensitivity of the method.There is report to propose to utilize the division of LPFG peak wavelength to measure transverse pressure, because long-period gratings is generally the length of several centimetres even tens centimetres, and can not observe reflection peak, so limited the practical application of sensor.
Oblique raster belongs to the short period fiber grating, and slight inclination is arranged between its grating planar and the optical axis, and it is identical with the method for making of ordinary optic fibre grating.Oblique raster is that it can be coupled to the basic mode of fl transmission in the fibre core back in the cladding mode of transmission with respect to ordinary optic fibre grating difference.This basic mode is relevant with external environment condition to the coupling of cladding mode, can be applied to stress, temperature, bending and refractive index sensing.Patent CN102012290A has proposed a kind of transverse pressure sensor based on inclined optical fiber grating, but this working sensor makes and in actual engineering, uses very difficulty in the transmission spectrum pattern.
Summary of the invention
The technical matters that the utility model mainly solves provides a kind of reflective pressure transducer, its convenient making, and compact conformation, applying flexible are applicable to the needs of practical engineering project.
For solving the problems of the technologies described above; The technical scheme that the utility model adopts is: a kind of reflective pressure transducer is provided; This reflective pressure transducer comprises metal die, metal sheeting, elastomeric material and inclined optical fiber grating; Said metal die is provided with through hole, is inlaid with superposed metal compressing tablet, elastomeric material, inclined optical fiber grating, elastomeric material and metal sheeting successively in the through hole; Said metal die is divided into upper die body and lower mold body; Upper die body and lower mold body are mosaic splicings; The side of upper die body is provided with via hole; Lower mold body is provided with groove, and said inclined optical fiber grating passes via hole and is installed on upper die body through protective sleeve, and inclined optical fiber grating is fixed in the groove of lower mold body simultaneously; The said end that is positioned at the inclined optical fiber grating of lower mold body groove is coated with metallic film and forms catoptron, and the inclined optical fiber grating other end is connected to system.
Preferably, the material of said metal die is hard metal material.
Preferably, the material of said metal sheeting is hard metal material.
Preferably, the inclination angle of said inclined optical fiber grating is 4 degree-10 degree.
Preferably, said metallic film is a gold or silver-colored.
Elastomeric material has low Young modulus, and its refractive index is not more than quartzy refractive index.
The beneficial effect of the utility model:
The reflective pressure transducer of the utility model, its convenient making, compact conformation, applying flexible are applicable to the needs of practical engineering project.
Description of drawings
Fig. 1 is the structural representation of a preferred embodiment of the reflective pressure transducer of the utility model.
Embodiment
Below in conjunction with accompanying drawing to the utility model preferred embodiment set forth in detail, thereby so that the advantage of utility model and characteristic can be easier to it will be appreciated by those skilled in the art that the protection domain of the utility model is made more explicit defining.
See also Fig. 1, the utility model embodiment comprises:
Reflective pressure transducer; This reflective pressure transducer comprises metal die 1, metal sheeting 2, elastomeric material 3 and inclined optical fiber grating 4; Said metal die 1 is provided with through hole 11, is inlaid with superposed metal compressing tablet 2, elastomeric material 3, inclined optical fiber grating 4, elastomeric material 3 and metal sheeting 2 successively in the through hole 11; Said metal die 1 is divided into upper die body 12 and lower mold body 13; Upper die body 12 is mosaic splicings with lower mold body 13; The side of upper die body 12 is provided with via hole; Lower mold body is provided with groove 14, and said inclined optical fiber grating 4 passes via hole and is installed on upper die body 12 through protective sleeve, and inclined optical fiber grating 4 is fixed in the groove 14 of lower mold body 13 simultaneously; The said end that is positioned at the inclined optical fiber grating 4 of lower mold body 13 grooves 14 is coated with metallic film and forms catoptron, and inclined optical fiber grating 4 other ends are connected to system; The material of said metal die 1 is hard metal material; The material of said metal sheeting 2 is hard metal material; Said elastomeric material 3 has low Young modulus, and its refractive index is not more than quartzy refractive index; The inclination angle of said inclined optical fiber grating 4 is 4 degree-10 degree; The used metal of metallic film is a gold or silver-colored.
The working method of reflective pressure transducer is: when sensor received perpendicular to the transverse pressure on metal sheeting surface, pressure acted on inclined optical fiber grating through metal sheeting and elastomeric layer.On the one hand, produce deformation after resilient material is under pressure, wrap up fiber grating gradually, because the cladding mode of inclined optical fiber grating is relevant with external environment, so covering mode spectrum shape changes.On the other hand, resilient material arrives optical fiber through Stress Transfer with extraneous Stress Transfer, because elasto-optical effect makes covering mode spectrum shape change.Through grating spectrum deformationization is tested and data processing, can obtain transverse stress.
The reflective pressure transducer of the utility model, its convenient making, compact conformation, applying flexible are applicable to the needs of practical engineering project.
The above is merely the embodiment of the utility model; Be not thus the restriction the utility model claim; Every equivalent structure or equivalent flow process conversion that utilizes the utility model instructions and accompanying drawing content to be done; Or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the utility model.
Claims (5)
1. reflective pressure transducer; It is characterized in that: this reflective pressure transducer comprises metal die, metal sheeting, elastomeric material and inclined optical fiber grating; Said metal die is provided with through hole, is inlaid with superposed metal compressing tablet, elastomeric material, inclined optical fiber grating, elastomeric material and metal sheeting successively in the through hole; Said metal die is divided into upper die body and lower mold body; Upper die body and lower mold body are mosaic splicings; The side of upper die body is provided with via hole; Lower mold body is provided with groove, and said inclined optical fiber grating passes via hole and is installed on upper die body through protective sleeve, and inclined optical fiber grating is fixed in the groove of lower mold body simultaneously; The said end that is positioned at the inclined optical fiber grating of lower mold body groove is coated with metallic film and forms catoptron, and the inclined optical fiber grating other end is connected to system.
2. reflective pressure transducer according to claim 1 is characterized in that: the material of said metal die is hard metal material.
3. reflective pressure transducer according to claim 1 is characterized in that: the material of said metal sheeting is hard metal material.
4. reflective pressure transducer according to claim 1 is characterized in that: the inclination angle of said inclined optical fiber grating is 4 degree-10 degree.
5. reflective pressure transducer according to claim 1 is characterized in that: said metallic film is gold or silver-colored.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220244739 CN202631165U (en) | 2012-05-29 | 2012-05-29 | Reflective pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220244739 CN202631165U (en) | 2012-05-29 | 2012-05-29 | Reflective pressure sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202631165U true CN202631165U (en) | 2012-12-26 |
Family
ID=47384356
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220244739 Expired - Fee Related CN202631165U (en) | 2012-05-29 | 2012-05-29 | Reflective pressure sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202631165U (en) |
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2012
- 2012-05-29 CN CN 201220244739 patent/CN202631165U/en not_active Expired - Fee Related
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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: 20121226 Termination date: 20140529 |