CN205785611U - All-silica fiber enamel amber pressure transducer - Google Patents
All-silica fiber enamel amber pressure transducer Download PDFInfo
- Publication number
- CN205785611U CN205785611U CN201620737136.5U CN201620737136U CN205785611U CN 205785611 U CN205785611 U CN 205785611U CN 201620737136 U CN201620737136 U CN 201620737136U CN 205785611 U CN205785611 U CN 205785611U
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- quartz
- optical fiber
- spherical shell
- tube
- hollow
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Abstract
The utility model discloses two kinds of novel all-silica fiber enamel amber pressure transducers, including optical fiber, quartz spherical shell, be connected to quartz spherical shell afterbody hollow quartz tube composition；One of which structure is that optical fiber inserts hollow quartz tube and extends in quartz spherical shell, and hollow quartz tube, together with fused fiber splice, makes enamel amber chamber airtight；Another kind of structure is difference welding quartz socket tube outside optical fiber, hollow quartz tube, in outside two quartz socket tubes, the common big quartz socket tube of welding, optical fiber end face and quartz spherical shell are all located at big quartz socket tube again and relatively puts.The operation principle of two kinds of sensors is all when external pressure acts on quartz spherical shell, causes chamber, enamel amber chamber length to change, and interference signal changes therewith.This utility model is with low cost, and preparation technology is simple, it is not necessary to large-scale instrument；Signal coupling condition is good, highly sensitive；Full quartz construction resistance to elevated temperatures is good, and temperature coefficient is little, is suitable to apply under hot environment.
Description
Technical field
This utility model relates to technical field of optical fiber sensing, the all-silica fiber enamel amber of a kind of brand new design
Pressure transducer.
Background technology
In recent years, along with the fast development in the fields such as national defence, Aero-Space, the energy, environment, electric power, automobile, to sensor
Miniaturization, low power consuming, adverse environment resistant etc. require to have higher requirement.Optical fiber sensor has the most hidden because of it
Body, higher certainty of measurement and sensitivity, faster dynamic responding speed, measure wide ranges, essential safety, do not done by electromagnetism
The advantage such as disturb, receive more and more attention.
Optical fiber F-P sensor, because size is little, simple in construction, sensitivity high, is widely used.Optical fiber F-P pressure
Sensor is one of main application, is widely used in the fields such as national defense safety, Aero-Space, petroleum exploration.At present, optical fiber enamel
The manufacture method of amber pressure transducer has MEMS technology, arc welding photonic crystal fiber technology etc..But there is making in these methods
The shortcomings such as complex process, cost are high, resistance to elevated temperatures difference.
Summary of the invention
The purpose of this utility model is to solve above-mentioned problems of the prior art, and provides two kinds of brand news
Design and have the full quartz of the features such as highly sensitive, resistance to elevated temperatures good, temperature coefficient is low, processing method is simple, low cost
Optical fiber F-P pressure transducer.
This utility model is achieved by the following technical solution:
The all-silica fiber enamel amber pressure transducer of a kind of structure, including optical fiber, hollow quartz tube and quartz spherical shell；Hollow
The Single port of quartz ampoule is connected communicates with quartz spherical shell, and one end (i.e. inner) of optical fiber is from the insertion of the another port of hollow quartz tube
And extend in quartz spherical shell, optical fiber is welded together with hollow quartz tube simultaneously, forms closed cavity.Wherein, quartz spherical shell is
The spherical shell of hollow shape, its wall thickness is relevant with sensitivity with the range of tested pressure.
Wherein, one end end face (i.e. inner face) in optical fiber extends quartz spherical shell is for vertically cutting flat with shape or hemispherical (also may be used
It is referred to as hemispherical radiation shape).When the inner face in optical fiber extends quartz spherical shell is hemispherical, hemispherical focus and quartz spherical shell
The focus of inner surface overlaps.
Optical fiber is more than optical fiber inner face distance quartz ball with the length of the fusion point distance optical fiber inner face of hollow quartz tube
The length (i.e. more than the length in actual enamel amber chamber) of shell inner surface, its concrete ratio is different according to the thermal coefficient of expansion of fiber optic materials
And change, adjust the position of fusion point, the temperature coefficient of sensor can be adjusted.
The all-silica fiber enamel amber pressure transducer of another kind of structure, including optical fiber, hollow quartz tube and quartz spherical shell；In
The Single port of empty quartz ampoule is connected with quartzy spherical shell and communicates；Optical fiber outer jacket dress welding have the first quartz socket tube, hollow quartz tube
Outer suit welding have common suit welding outside the second quartz socket tube, the first quartz socket tube and the second quartz socket tube to have the 3rd stone
English sleeve pipe, to form closed cavity；First quartz socket tube is positioned at the port, one end of the 3rd quartz socket tube, and one end of optical fiber is placed in
3rd quartz socket tube is outer, the other end is placed in the 3rd quartz socket tube；Second quartz socket tube is positioned at the other end of the 3rd quartz socket tube
Port, the mouth of pipe of hollow quartz tube is outwardly and quartz spherical shell is positioned at the 3rd quartz socket tube；Optical fiber is placed in the 3rd quartz socket tube
Interior one end end face is relative with quartz spherical shell and puts.Wherein, quartz spherical shell be the spherical shell of hollow shape, its wall thickness with tested
The range of pressure is relevant with sensitivity.
Wherein, one end end face (i.e. inner face) in optical fiber is placed in the 3rd quartz socket tube is for vertically cutting flat with shape.
The length of the fusion point distance optical fiber inner face of optical fiber and the first quartz socket tube is more than optical fiber inner face distance quartz
The length of spherical shell outer surface.
In the all-silica fiber enamel amber pressure transducer of above two structure, optical fiber may select single-mode fiber, multimode fibre,
Photonic crystal fiber, large core fibre or side-hole fiber etc..
The all-silica fiber enamel amber pressure transducer of two kinds of structures described in the utility model, its core texture is all by light
Fibre, hollow quartz tube and quartz spherical shell are constituted, and one is placed in quartz spherical shell for optical fiber, and another kind is that optical fiber is placed in quartz ball
Shell is outer and relative with quartz spherical shell and puts, and use and the test philosophy of the all-silica fiber enamel amber pressure transducer of two kinds of structures are
Identical, particularly as follows: the inner end face of optical fiber (vertically cutting flat with shape or hemispherical radiation shape) and quartz spherical shell inner surface or outer surface
Form parallel reflecting surface, constitute enamel amber chamber.Light when optical fiber inner face, part luminous reflectance back into optical fibers, part light transmission optical fiber
Inner face, arrives spherical shell inner surface or outer surface and reflection coupling enters optical fiber.Two parts reflection light forms interference spectrum.When outward
During boundary's ambient pressure variations, quartz spherical shell is squeezed, and quartz spherical shell inner surface or outer surface are reflected back the light path of optical fiber and occur
Change, thus change interference spectrum, demodulated interferential spectrum, thus reach to measure the effect of ambient pressure environment.When sensor should
When the measurement of hot environment, due to fusion point (the first structure middle finger optical fiber and the fusion point of hollow quartz tube, the second
Structure middle finger optical fiber and the fusion point of the first quartz socket tube) distance optical fiber inner face length more than optical fiber inner face distance spherical shell
Inner surface or the length of outer surface, the inside thermal expansion of optical fiber can be offset this most outside thermal expansion of spherical shell, thus be reduced sensor
Temperature drift.
Fig. 4 is the interference spectrum figure of this utility model sensor, can draw from figure, the light of this utility model sensor
Reaching by force-24dB, contrast reaches 7dB；Fig. 5 is the pressure response curve of this utility model sensor, can draw from figure, this
Utility model sensor has good linear response to pressure, and response sensitivity reaches-6.61nm/MPa.
This utility model has the advantages that
(1) design science is reasonable, and simple in construction is novel；(2) with low cost, preparation technology is simple, it is not necessary to large-scale instrument；
(3) signal coupling condition is good, highly sensitive；(4) full quartz construction resistance to elevated temperatures is good, and temperature coefficient is low.
Accompanying drawing explanation
Fig. 1 is the structural representation one of this utility model sensor.
Fig. 2 is the structural representation two of this utility model sensor.
Fig. 3 is the structural representation three of this utility model sensor.
Fig. 4 is the interference spectrum figure of this utility model sensor.
Fig. 5 is the pressure response curve of this utility model sensor.
In figure: 1-optical fiber, 2-hollow quartz tube, 3-quartz spherical shell, 4-vertically cut flat with that shape, 5-be hemispherical, 6-fusion point, 7-
First quartz socket tube, 8-the second quartz socket tube, 9-the 3rd quartz socket tube.
Detailed description of the invention
In order to make the purpose of this utility model and advantage clearer, below in conjunction with embodiment, this utility model is entered
Row further describes.Should be appreciated that specific embodiment described herein, and need not only in order to explain this utility model
In limiting this utility model.
As shown in Figure 1 to Figure 3, this utility model provides a kind of all-silica fiber enamel amber pressure transducer, including optical fiber
1, hollow quartz tube 2 and quartz spherical shell 3, optical fiber 1 may select single-mode fiber, multimode fibre, photonic crystal fiber, large core fibre or
Side-hole fiber etc.；Quartz spherical shell 3 is the spherical shell of hollow shape, and its wall thickness is relevant with sensitivity with the range of tested pressure,
One end of hollow quartz tube 2 is connected communicates with quartz spherical shell 3；
A kind of structure of described sensor as shown in Figure 1, 2, particularly as follows: one end of optical fiber 1 is from another of hollow quartz tube 2
End inserts and extends in quartz spherical shell 3；Optical fiber 1 insert quartz spherical shell 3 in inner face for vertically to cut flat with shape 4 or hemispherical 5, when
When optical fiber inner face is hemispherical 5, the focus of hemispherical 5 overlaps with the focus of quartz spherical shell 3 inner surface；Optical fiber 1 and hollow stone
English pipe 2 is welded together, and forms closed cavity, and the fusion point 6 of optical fiber 1 and hollow quartz tube 2 is apart from the length of optical fiber 1 inner face
More than the length of optical fiber 1 inner face distance quartz spherical shell 3 inner surface, its concrete ratio is according to the thermal coefficient of expansion of fiber optic materials not
Change together；Adjust fusion point position, to adjust the temperature coefficient of sensor.
The another kind of structure of described sensor is as it is shown on figure 3, particularly as follows: the outer suit of optical fiber 1 welding have the first quartz sleeve
Pipe 7, the outer suit of hollow quartz tube 2 welding have the second quartz socket tube 8, common outside the first quartz socket tube 7 and the second quartz socket tube 8
Suit welding have the 3rd quartz socket tube 9, form closed cavity；First quartz socket tube 7 is positioned at one end end of the 3rd quartz socket tube 9
At Kou, one end of optical fiber 1 is placed in outside the 3rd quartz socket tube 9, the other end is placed in the 3rd quartz socket tube 9；Second quartz socket tube 8
In the other end port of the 3rd quartz socket tube 9, the mouth of pipe of hollow quartz tube 2 is outwardly and quartz spherical shell 3 is positioned at the 3rd quartz sleeve
In pipe 9；One end end face that optical fiber 1 is placed in the 3rd quartz socket tube 9 is relative with quartz spherical shell 3 for vertically cutting flat with shape 4 and this end face
And put.Optical fiber 1 and the first quartz socket tube) fusion point 6 apart from optical fiber 1 inner face length more than optical fiber 1 inner face distance stone
The length of English spherical shell 3 outer surface, its concrete ratio changes according to the thermal coefficient of expansion difference of fiber optic materials；Adjust fusion point position
Put, to adjust the temperature coefficient of sensor.
Originally the principle being embodied as is: vertically cut flat with shape 4 or hemispherical 5 optical fiber 1 inner faces and quartz spherical shell 3 inner surface or
Outer surface forms parallel reflecting surface, constitutes enamel amber chamber.Light when optical fiber 1 inner face, part luminous reflectance back into optical fibers 1, part light
Through optical fiber 1 inner face, arrive spherical shell 3 inner surface or outer surface and reflection coupling enters optical fiber 1.Two parts reflection light is formed dry
Relate to spectrum.When ambient pressure environment changes, quartz spherical shell 3 is squeezed, quartz spherical shell 3 inner surface or outer surface reflected light
The light path of fine 1 changes, thus changes interference spectrum.Demodulated interferential spectrum, thus reach to measure the effect of ambient pressure environment
Really.When sensor is applied to the measurement of hot environment, owing to fusion point 6 should be greater than optical fiber 1 apart from the length of optical fiber 1 inner face
Inner face distance quartz spherical shell 3 inner surface or the length of outer surface, the inside thermal expansion of optical fiber 1 can offset this most outside heat of spherical shell
Expand, thus reduce the temperature coefficient of sensor.
Embodiment 1
A kind of all-silica fiber enamel amber pressure transducer: optical fiber 1 uses the general single mode fiber that Corning Incorporated produces, outside it
A diameter of 125 μm, inner end is for vertically cutting flat with shape 4；Hollow quartz tube 2 internal-and external diameter is respectively 126 μm and 200 μm, quartz spherical shell 3
Overall diameter 280 μm, wall thickness is about 5 μm.A length of 200 μm of optical fiber 1 inner face distance quartz spherical shell 3 inner surface, fusion point 6
Put about a length of 2000 μm of distance optical fiber 1 inner face.
Embodiment 2
A kind of all-silica fiber enamel amber pressure transducer: optical fiber 1 uses the common multimode fibre that Corning Incorporated produces, outside it
A diameter of 125 μm, inner face is hemispherical 4；Hollow quartz tube 2 internal-and external diameter is respectively 135 μm and 200 μm, and quartz spherical shell 3 is outer straight
Footpath 350 μm, wall thickness is about 3 μm；Optical fiber 1 inner face distance quartz spherical shell 3 inner surface a length of 110 μm, fusion point 6 position away from
From about a length of 1125 μm of optical fiber 1 inner face.
Embodiment 3
A kind of all-silica fiber enamel amber pressure transducer: optical fiber 1 uses the common multimode fibre that Corning Incorporated produces, outside it
A diameter of 125 μm, inner face is for vertically cutting flat with shape 4；Hollow quartz tube 2 internal-and external diameter is respectively 125 μm and 80 μm, quartz spherical shell 3
Overall diameter 200 μm, wall thickness is about 3 μm；First quartz socket tube 7 and the second quartz socket tube 8 inner and outer diameter are 135 μm and 250 μm,
3rd quartz socket tube 9 inner and outer diameter is respectively 260 μm and 350 μm.The length of optical fiber 1 inner face distance quartz spherical shell 3 outer surface
It is 50 μm, about a length of 550 μm of fusion point 6 positional distance optical fiber 1 inner face.
The above is only preferred implementation of the present utility model, it is noted that for the common skill of the art
For art personnel, on the premise of without departing from this utility model principle, it is also possible to make some improvements and modifications, these improve and
Retouching also should be regarded as protection domain of the present utility model.
Claims (9)
1. an all-silica fiber enamel amber pressure transducer, it is characterised in that: include optical fiber (1), hollow quartz tube (2) and quartz
Spherical shell (3)；Hollow quartz tube (2) is connected communicates with quartz spherical shell (3), and one end of optical fiber (1) is from hollow quartz tube (2) insertion also
Extending in quartz spherical shell (3), optical fiber (1) is welded together with hollow quartz tube (2) simultaneously.
All-silica fiber enamel amber pressure transducer the most according to claim 1, it is characterised in that: optical fiber (1) extends quartz
One end end face in spherical shell is for vertically cutting flat with shape (4) or hemispherical (5).
All-silica fiber enamel amber pressure transducer the most according to claim 1 and 2, it is characterised in that: when optical fiber (1) extends
When one end end face in quartz spherical shell (3) is hemispherical (5), the focus of hemispherical (5) and the focus of quartz spherical shell (3) inner surface
Overlap.
All-silica fiber enamel amber pressure transducer the most according to claim 1 and 2, it is characterised in that: optical fiber (1) and hollow
The length of fusion point (6) distance optical fiber (1) inner face of quartz ampoule (2) is more than in optical fiber (1) inner face distance quartz spherical shell (3)
The length on surface.
All-silica fiber enamel amber pressure transducer the most according to claim 3, it is characterised in that: optical fiber (1) and hollow stone
The length of fusion point (6) distance optical fiber (1) inner face of English pipe (2) is more than optical fiber (1) inner face distance quartz spherical shell (3) interior table
The length in face.
6. an all-silica fiber enamel amber pressure transducer, it is characterised in that: include optical fiber (1), hollow quartz tube (2) and quartz
Spherical shell (3)；Hollow quartz tube (2) is connected communicates with quartz spherical shell (3), and optical fiber (1) is set with outward also welding the first quartz socket tube
(7), hollow quartz tube (2) is set with outward and welding has the second quartz socket tube (8), the first quartz socket tube (7) and the second quartz socket tube
(8) common suit welding have the 3rd quartz socket tube (9) outward, and the mouth of pipe of hollow quartz tube (2) is outwardly and quartz spherical shell (3) is positioned at
In 3rd quartz socket tube (9), in one end of optical fiber (1) is placed in the 3rd quartz socket tube (9) and relative with quartz spherical shell (3) and put.
All-silica fiber enamel amber pressure transducer the most according to claim 6, it is characterised in that: optical fiber (1) is placed in the 3rd
One end end face in quartz socket tube (9) is for vertically cutting flat with shape (4).
8. according to the all-silica fiber enamel amber pressure transducer described in claim 6 or 7, it is characterised in that: optical fiber (1) and first
The length of fusion point (6) distance optical fiber (1) inner face of quartz socket tube (8) is more than optical fiber (1) inner face distance quartz spherical shell (3)
The length of outer surface.
9. according to the all-silica fiber enamel amber pressure transducer described in claim 1 or 6, it is characterised in that: optical fiber (1) is single mode
Optical fiber, multimode fibre, photonic crystal fiber, large core fibre or side-hole fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620737136.5U CN205785611U (en) | 2016-07-13 | 2016-07-13 | All-silica fiber enamel amber pressure transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620737136.5U CN205785611U (en) | 2016-07-13 | 2016-07-13 | All-silica fiber enamel amber pressure transducer |
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| Publication Number | Publication Date |
|---|---|
| CN205785611U true CN205785611U (en) | 2016-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620737136.5U Withdrawn - After Issue CN205785611U (en) | 2016-07-13 | 2016-07-13 | All-silica fiber enamel amber pressure transducer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105953958A (en) * | 2016-07-13 | 2016-09-21 | 中北大学 | All-silica fiber Fabry-Perot pressure sensor |
| CN107941390A (en) * | 2017-11-13 | 2018-04-20 | 中北大学 | Optical fiber Fabry-Perot sensor and its manufacture method |
| CN110553774A (en) * | 2018-06-01 | 2019-12-10 | 武汉理工大学 | Miniature full-quartz optical fiber Fizeau cavity high-frequency dynamic pressure sensor and manufacturing method thereof |
-
2016
- 2016-07-13 CN CN201620737136.5U patent/CN205785611U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105953958A (en) * | 2016-07-13 | 2016-09-21 | 中北大学 | All-silica fiber Fabry-Perot pressure sensor |
| CN105953958B (en) * | 2016-07-13 | 2018-08-21 | 中北大学 | All-silica fiber enamel amber pressure sensor |
| CN107941390A (en) * | 2017-11-13 | 2018-04-20 | 中北大学 | Optical fiber Fabry-Perot sensor and its manufacture method |
| CN107941390B (en) * | 2017-11-13 | 2020-09-29 | 中北大学 | Optical fiber Fabry-Perot sensor and manufacturing method thereof |
| CN110553774A (en) * | 2018-06-01 | 2019-12-10 | 武汉理工大学 | Miniature full-quartz optical fiber Fizeau cavity high-frequency dynamic pressure sensor and manufacturing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20161207 Effective date of abandoning: 20180821 |
|
| AV01 | Patent right actively abandoned |