CN101881632A - Spring-type high-precision optical fiber sensor with cushioning structure - Google Patents
Spring-type high-precision optical fiber sensor with cushioning structure Download PDFInfo
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- CN101881632A CN101881632A CN2010102060259A CN201010206025A CN101881632A CN 101881632 A CN101881632 A CN 101881632A CN 2010102060259 A CN2010102060259 A CN 2010102060259A CN 201010206025 A CN201010206025 A CN 201010206025A CN 101881632 A CN101881632 A CN 101881632A
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Abstract
The invention discloses a spring-type high-precision optical fiber sensor with a cushioning structure. By adopting a multi-turn structure, the optical fiber sensor greatly prolongs the length of an effective signal optical fiber, improves the dynamic range of the optical fiber sensor while dramatically reducing the bending curvature of the signal optical fiber, and takes at least one signal optical fiber section as a buffer signal optical fiber; and when the signal optical fiber tends to elongate or contract caused by change of the bending curvature of the signal optical fiber, movement of the buffer signal optical fiber can make up or absorb elongation or contraction of the length of the signal optical fiber owing to change of the bending curvature so that the axial stress of the signal optical fiber is reduced when in use and the service life of the signal optical fiber is prolonged. The spring-type high-precision optical fiber sensor has the advantages of simple structure, rational design, convenient processing and manufacturing, flexible usage mode, high sensitivity, long service life and good use effect, thus providing a wide application prospect for application of the optical fiber sensor.
Description
Technical field
The present invention relates to a kind of Fibre Optical Sensor of field of sensing technologies, specifically is the Fibre Optical Sensor that a kind of high precision stress parameters with spring type multilayer of buffer structure is tested.
Background technology
The kind of existing fiber sensor is very many, mainly comprise polytypes such as light intensity adjusting type Fibre Optical Sensor, fiber-optic grating sensor, optical fibre interferometric sensor, both characteristics of back are sensing sensitivity height, but in the actual application, there are defective and deficiencies such as equipment complexity, utilization and operation cost height, thereby make the application of Fibre Optical Sensor be very limited.Especially to the Fibre Optical Sensor of higher sensitivity, it can respond the change situation of various environmental baselines in the use, as optical fibre interferometric sensor, because its sensitivity is very high, but after it is applied under the physical condition, find that environmental factors such as temperature, air pressure, vibration all can impact its running parameter, thereby during actual the use, have to take multiple measure to prevent and reject above-mentioned Effect of Environmental, thereby make the structure of its monitoring equipment more and more be tending towards complicated, the operation use cost significantly improves.
And optical fiber micro-bending sensor is a kind of sensor of light intensity modulation, has the advantages that cost is low, highly sensitive, have certain environment interference, and its implementation is based on that the bending of optical fiber or microbending loss realize.By changing the degree of crook of optical fiber, thereby cause the variation of Output optical power.
The principle of optical power loss is: when optical fiber is subjected to crooked disturbance, will produce bending loss, mainly be microbending loss and macrobending loss.Both bending losss all are to cause that both losses can be calculated the bending loss size according to the theoretical formula of Marcuse owing to cause during fibre-optical bending part guided mode in the fibre core to be coupled to covering, and its formula is as follows:
P
OUT＝P
IN?exp(-γS)
Wherein, Pout and Pin are respectively output and input optical power, and γ is the bending loss coefficient, and S is crooked arc length.The bending loss coefficient gamma of optical fiber is big more as can be seen, be that fiber bending radius is more little, then loss is big more, but the too small meeting of bending radius causes the optical fiber life-span to reduce significantly, influence the serviceable life of attenuator, so the bending radius of optical fiber is restricted in the practical application; On the other hand, under identical bending loss coefficient gamma,, then can increase decay if increase crooked arc length S, can be by increasing considerably crooked arc length S, reach the dynamic range that increases substantially fibre optic attenuator and the purpose of precision.
When the bending in optical fiber micro-bending sensor occurs, the length of optical fiber or elongation, never the part that bending occurs moves some and replenishes, the elongation of optical fiber will make the suffered stress of optical fiber increase, influenced the serviceable life of optical fiber, but along with the increase of crooked arc length S, the phenomenon that optical fiber is forced to extend will significantly occur, and has limited the serviceable life of such Fibre Optical Sensor like this.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the invention provides a kind of spring-type high-precision optical fiber sensor with buffer structure, this sensor construction is simple, reasonable in design, method of operating convenient and use-pattern is flexible, have certain environment interference, highly sensitive, because the existence of the optical fiber of buffer structure makes this Fibre Optical Sensor have the characteristics of long service life.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of spring-type high-precision optical fiber sensor with buffer structure, it is characterized in that: a multi-turn shape spring type member that constitutes by spring wire, upper surface and lower surface upper edge spring wire at spring wire vertically are laid with a plurality of distortion teeth, distortion tooth on the lower surface of the upper spring silk in the two adjacent rings spring wire is staggered corresponding with the distortion tooth on the lower spring silk upper surface, and between the distortion tooth on distortion tooth on the upper spring silk lower surface and the lower spring silk upper surface, accompany signal optical fibre, but signal optical fibre wherein at least one section be not clamped in the distortion between cog as buffering signals optical fiber, the position change at spring type member two ends when the two ends of spring type member are subjected to stress, and cause having in the spring type member distance between the two adjacent coil spring silks to change, thereby make position change between distortion tooth on the upper spring silk lower surface in this two coil springs silk and the distortion tooth on the lower spring silk upper surface, thereby make to be clipped in that bending curvature that both are out of shape the signal optical fibre of between cog changes and when causing the length of signal optical fibre to elongate or shorten trend, buffering signals optical fiber can move to remedy or receive because of bending curvature and change elongating or shortening of the signal optical fibre length that causes.
When the end positions of spring type member changes, extend under tension as the spring type member, under compressive stress, shorten, then constituting distance between the many groups of two adjacent coil spring silks in the spring type member widens or dwindles, thereby distortion tooth on the upper spring silk lower surfaces in the two adjacent rings of group more than the making spring wires and the distortion between cog position on the lower spring silk upper surface increase or reduce, thereby make and be clipped in bending curvature that both are out of shape the signal optical fibre of between cog and reduce or increase and cause the contraction in length or the elongation of signal optical fibre, the stretching of signal optical fibre under stress can be extended, thereby increased the suffered stress of optical fiber, cause the optical fiber minimizing in serviceable life, and the appearance of buffering signals optical fiber, make the corresponding compensation that elongated or shortened of signal optical fibre, thereby reduced the suffered stress of signal optical fibre significantly, prolonged the serviceable life of signal optical fibre.
The scheme that Fibre Optical Sensor of the present invention solves further technical matters is: described buffering signals optical fiber is the signal optical fibre that does not have distortion tooth zone between the two adjacent coil spring silks of a group in the spring type member.
The scheme that Fibre Optical Sensor of the present invention solves further technical matters is: described buffering signals optical fiber is a bit leaving the spring type member, entering the signal optical fibre of spring type member with tangential direction at another again with tangential direction from the spring type member.
The scheme that Fibre Optical Sensor of the present invention solves further technical matters is: described buffering signals optical fiber is positioned on the pallet.
The scheme that Fibre Optical Sensor of the present invention solves further technical matters is: described pallet is connected with the spring type member.
The scheme that Fibre Optical Sensor of the present invention solves further technical matters is: the extended fiber of described signal optical fibre connects test cell.
The scheme that Fibre Optical Sensor of the present invention solves further technical matters is: described signal optical fibre is coated by waterproof material.
The scheme that Fibre Optical Sensor of the present invention solves further technical matters is: described waterproof material is a greasy for preventing water.
The scheme that Fibre Optical Sensor of the present invention solves further technical matters is: described signal optical fibre 6 is for the outside optical fiber that is surrounded by the multilayer fibers protective seam, as tight tube fiber, carbon coated fiber, polyimide coated optical fiber etc.; Described signal optical fibre 6 also can be plastic optical fiber or photonic crystal fiber.
The present invention compared with prior art has the following advantages:
1, the spring-type high-precision optical fiber sensor that has buffer structure, this sensor construction is simple, reasonable in design, method of operating convenient and use-pattern is flexible, have certain environment interference, highly sensitive.
2, the spring-type high-precision optical fiber sensor that has buffer structure is because the existence of the optical fiber of buffer structure makes this Fibre Optical Sensor have the characteristics of long service life.
In sum, the present invention is simple in structure, reasonable in design, processing and fabricating convenient and use-pattern is flexible, highly sensitive, result of use is good, have to such an extent that buffer structure can reduce the suffered drawing stress of signal optical fibre significantly, make Fibre Optical Sensor of the present invention have longer serviceable life.
Below by drawings and Examples, the technical scheme of inventing is described in further detail.
Description of drawings
Fig. 1 is the structural representation of the present invention's first embodiment.
Fig. 2 is the multi-turn spring wire schematic cross-section of Fig. 1 medi-spring type member.
Fig. 3 is the structural representation of the present invention's second embodiment.
Fig. 4 is the structural representation of the present invention's the 3rd embodiment.
Description of reference numerals:
| The 1-Transmission Fibers; | 4-spring type member; | The 5-test cell; |
| The 6-signal optical fibre; | The 7-processing unit; | 10-buffering signals optical fiber; |
| The 11-pallet; | Distortion tooth on the 4-1 one spring wire lower surface; | Distortion tooth on the 4-2-spring wire upper surface; |
| The 20-material water-proof material. |
Embodiment
As Fig. 1, shown in Figure 2, the present invention includes a multi-turn shape spring type member 4 that constitutes by spring wire, upper surface and lower surface upper edge spring wire at spring wire vertically are laid with a plurality of distortion teeth continuously, distortion tooth 4-1 on the lower surface of the upper spring silk in the two adjacent rings spring wire is staggered corresponding with the distortion tooth 4-2 on the lower spring silk upper surface, and between the distortion tooth 4-2 on distortion tooth 4-1 on the upper spring silk lower surface and the lower spring silk upper surface, accompany signal optical fibre 6, but signal optical fibre 6 wherein at least one section be not clamped in the distortion between cog as buffering signals optical fiber 10, the position change at spring type member 4 two ends when the two ends of spring type member 4 are subjected to stress, and cause having in the spring type member 4 distance between the two adjacent coil spring silks to change, thereby make position change between distortion tooth 4-1 on the upper spring silk lower surface in this two coil springs silk and the distortion tooth 4-2 on the lower spring silk upper surface, thereby make to be clipped in that bending curvature that both are out of shape the signal optical fibre 6 of between cog changes and when causing the length of signal optical fibre 6 to elongate or shorten trend, buffering signals optical fiber 10 can move to remedy or receive because of bending curvature and change elongating or shortening of signal optical fibre 6 length that cause.
In the present embodiment, spring type member 4 integral body are shape in the shape of a spiral, when the end positions of spring type member 4 changes, extend under tension as spring type member 4, under compressive stress, shorten, then constituting distance between the many groups of two adjacent coil spring silks in the spring type member 4 widens or dwindles, thereby make between distortion tooth 4-1 and the distortion tooth 4-2 on the lower spring silk upper surface on the upper spring silk lower surfaces in many group two adjacent rings spring wires the position increase or reduce, thereby make and be clipped in bending curvature that both are out of shape the signal optical fibre 6 of between cog and reduce or increase and cause the contraction in length or the elongation of signal optical fibre, the stretching of signal optical fibre 6 under stress can be extended, thereby increased the suffered stress of optical fiber, cause the optical fiber minimizing in serviceable life, and the appearance of buffering signals optical fiber 10, make the corresponding compensation that elongated or shortened of signal optical fibre 6, thereby reduced the suffered stress of signal optical fibre 6 significantly, prolonged the serviceable life of signal optical fibre 6.The Transmission Fibers 1 of passing through of signal optical fibre 6 is connected with test cell 5, what test cell 5 connected later is processing unit 7, the variation of signal optical fibre 6 bending curvatures can cause the variation at the light signal of signal optical fibre 6 internal transmission, can monitor the variation of this light signal by test cell 5, and carry out subsequent treatment by processing unit 7.
Described signal optical fibre 6 is for the outside optical fiber that is surrounded by the multilayer fibers protective seam, as tight tube fiber, carbon coated fiber, polyimide coated optical fiber etc.; Described signal optical fibre 6 also can be plastic optical fiber or photonic crystal fiber.
Embodiment 2
As shown in Figure 3, in the present embodiment, as different from Example 1: described buffering signals optical fiber 10 is positioned on the pallet 11, and pallet is fixed on the spring type member 4.In the present embodiment, the structure of remainder, annexation and principle of work are all identical with embodiment 1.
Embodiment 3
As shown in Figure 4, in the present embodiment, as different from Example 1: be coated with material water-proof material 20 around described signal optical fibre 6 and the buffering signals optical fiber 10, prevent that hydrone from must corrode signal optical fibre 6 or buffering signals optical fiber 10, prolong the serviceable life of signal optical fibre 6 or buffering signals optical fiber 10.In the present embodiment, the structure of remainder, annexation and principle of work are all identical with embodiment 1.
The above; it only is preferred embodiment of the present invention; be not that the present invention is imposed any restrictions, everyly any simple modification that above embodiment did, change and equivalent structure changed, all still belong in the protection domain of technical solution of the present invention according to the technology of the present invention essence.
Claims (10)
1. the spring-type high-precision optical fiber sensor that has buffer structure, it is characterized in that: a multi-turn shape spring type member that constitutes by spring wire, upper surface and lower surface upper edge spring wire at spring wire vertically are laid with a plurality of distortion teeth, distortion tooth on the lower surface of the upper spring silk in the two adjacent rings spring wire is staggered corresponding with the distortion tooth on the lower spring silk upper surface, and between the distortion tooth on distortion tooth on the upper spring silk lower surface and the lower spring silk upper surface, accompany signal optical fibre, but signal optical fibre wherein at least one section be not clamped in the distortion between cog as buffering signals optical fiber, the position change at spring type member two ends when the two ends of spring type member are subjected to stress, and cause having in the spring type member distance between the two adjacent coil spring silks to change, thereby make position change between distortion tooth on the upper spring silk lower surface in this two coil springs silk and the distortion tooth on the lower spring silk upper surface, thereby make to be clipped in that bending curvature that both are out of shape the signal optical fibre of between cog changes and when causing the length of signal optical fibre to elongate or shorten trend, buffering signals optical fiber can move to remedy or receive because of bending curvature and change elongating or shortening of the signal optical fibre length that causes.
2. according to the described spring-type high-precision optical fiber sensor with buffer structure of claim 1, it is characterized in that: described buffering signals optical fiber is the signal optical fibre that does not have distortion tooth zone between the two adjacent coil spring silks of a group in the spring type member.。
3. according to the described spring-type high-precision optical fiber sensor with buffer structure of claim 1, it is characterized in that: described buffering signals optical fiber is a bit leaving the spring type member, enter the signal optical fibre of spring type member at another point again from the spring type member.
4. according to the described spring-type high-precision optical fiber sensor with buffer structure of claim 1, it is characterized in that: described buffering signals optical fiber is positioned on the pallet.
5. according to the described spring-type high-precision optical fiber sensor with buffer structure of claim 4, it is characterized in that: described pallet is connected with the spring type member.
6. according to the described spring-type high-precision optical fiber sensor with buffer structure of claim 1, it is characterized in that: the extended fiber of described signal optical fibre connects test cell.
7. according to the described spring-type high-precision optical fiber sensor with buffer structure of claim 1, it is characterized in that: described signal optical fibre is coated by waterproof material.
8. according to the described spring-type high-precision optical fiber sensor with buffer structure of claim 7, it is characterized in that: described waterproof material is a greasy for preventing water.
9. according to the described spring-type high-precision optical fiber sensor of claim 1 with buffer structure; it is characterized in that: described signal optical fibre is for the outside optical fiber that is surrounded by the multilayer fibers protective seam, as tight tube fiber, carbon coated fiber, polyimide coated optical fiber or washing optical fiber.
10. according to the described spring-type high-precision optical fiber sensor with buffer structure of claim 1, it is characterized in that: described signal optical fibre is plastic optical fiber or photonic crystal fiber.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102060259A CN101881632A (en) | 2010-06-21 | 2010-06-21 | Spring-type high-precision optical fiber sensor with cushioning structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102060259A CN101881632A (en) | 2010-06-21 | 2010-06-21 | Spring-type high-precision optical fiber sensor with cushioning structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107476661A (en) * | 2017-08-02 | 2017-12-15 | 昆山金鸣光电科技有限公司 | A kind of lock core on off state sensing device and its application |
| CN108919441A (en) * | 2018-07-03 | 2018-11-30 | 佛山市易轩软件科技有限公司 | A kind of high density resistance to compression fiber bundle optical cable with heat dissipation effect |
| CN117392796A (en) * | 2023-12-11 | 2024-01-12 | 云南保利天同水下装备科技有限公司 | Partition detection method, partition detection system and defense detection assembly thereof |
-
2010
- 2010-06-21 CN CN2010102060259A patent/CN101881632A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107476661A (en) * | 2017-08-02 | 2017-12-15 | 昆山金鸣光电科技有限公司 | A kind of lock core on off state sensing device and its application |
| CN108919441A (en) * | 2018-07-03 | 2018-11-30 | 佛山市易轩软件科技有限公司 | A kind of high density resistance to compression fiber bundle optical cable with heat dissipation effect |
| CN108919441B (en) * | 2018-07-03 | 2019-12-20 | 安徽长荣光纤光缆科技有限公司 | High-density compression-resistant optical fiber bundle cable with heat dissipation effect |
| CN117392796A (en) * | 2023-12-11 | 2024-01-12 | 云南保利天同水下装备科技有限公司 | Partition detection method, partition detection system and defense detection assembly thereof |
| CN117392796B (en) * | 2023-12-11 | 2024-03-22 | 云南保利天同水下装备科技有限公司 | Partition detection method, partition detection system and defense detection assembly thereof |
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Application publication date: 20101110 |