CN102829901A - Optical fiber sensing device waveform grooves and cylinder body - Google Patents
Optical fiber sensing device waveform grooves and cylinder body Download PDFInfo
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- CN102829901A CN102829901A CN2011101581357A CN201110158135A CN102829901A CN 102829901 A CN102829901 A CN 102829901A CN 2011101581357 A CN2011101581357 A CN 2011101581357A CN 201110158135 A CN201110158135 A CN 201110158135A CN 102829901 A CN102829901 A CN 102829901A
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Abstract
The invention discloses an optical fiber sensing device with waveform grooves and a cylinder body, wherein the waveform grooves (4) are distributed on the cylinder body (10); wave crests and wave troughs which are staggered and corresponded to each other are arranged on two opposite planes of the waveform grooves (4); and a first signal optical fiber (6) is arranged between wave crests on two opposite planes of the waveform grooves (4). When the cylinder body (10) is deformed under stress, the distance between wave crests at two opposite sides inside the waveform grooves (4) on the cylinder body (10) is changed, then a bending curvature of the first optical fiber (6) arranged between the wave crests is changed, so that the bending loss of the first optical fiber (6) is changed; the stress on the cylinder body (10) can be calculated through a testing unit (5) and a processing unit (7); and a novel sensing device is formed through the organic combination of the cylinder body (10) and the micro-bending waveform grooves (4).
Description
Technical field
The invention belongs to the fiber stress sensing device, especially relate to a kind of bar shape stress sensing device that changes based on fiber microbending loss.
Background technology
[0002] owing to needs to landslide, rubble flow, earthquake and the health monitoring of large-sized artificial buildings; Stress parameters monitoring is one of important parameter of being concerned about most of technician, and traditional is that the sensor of core causes its range of application narrow owing to the defective of aspects such as permanance, antijamming capability with electricity and magnetic.Go deep into and development of fiber technology along with what optical fiber was understood, more and more scholars tends to adopt optical fiber technology scheme counter stress to carry out point type and distributed monitoring, in the patent documentation of one Chinese patent application number 200410073021.2 " flush type microbend fiber sensor and microbend fiber sensor are imbedded and method of testing "; Proposed the snakelike microbend fiber sensor that a kind of more piece short sleeve that includes optical fiber constitutes, formed little curved point between its sleeve pipe, with respect to traditional sensor; Its advantage is anti-electromagnetic interference (EMI), is applicable to the detection of multiple rock mass, measuring accuracy height, can realizes distributed monitoring, but in this scheme, the bending curvature of the little curved point that forms between sleeve pipe is at random; Also maybe be bigger, also maybe be less, when curvature is too small; The intensity of optical fiber will be affected; Even ruptured soon, causing the inefficacy of sensing device, the protection of little in addition curved some place optical fiber is also obviously not enough; But if strengthen protection; Possibly lose condition again, perhaps need special device to protect, increase cost again virtually with little curved detection.These have all limited the promoting the use of of Fibre Optical Sensor of this invention.
Summary of the invention
In order to overcome the deficiency of above-mentioned prior art; The present invention provides a kind of fiber stress sensing device that on damaged surface, is distributed with wave groove; What adopt is prefabricated optical fiber micro-bending structure, not only can monitor the variation of stress, can calculate the size of stress simultaneously.Make optical fiber stress monitoring device of the present invention have the advantages that long service life, precision are high, purposes is wide.
For solving the problems of the technologies described above; The technical scheme that the present invention adopts is: a kind of waveform groove cylinder fibre-optical sensing device; It is characterized in that: on cylinder, be distributed with waveform groove, have the crest and the trough of interlaced correspondence on the relative two sides of waveform groove respectively, and between the crest on the relative two sides of waveform groove, accompany first signal optical fibre; First signal optical fibre connects test cell through extended fiber, connects processing unit at the back at test cell.
When cylinder is out of shape under stress; The change width of waveform groove also can change the distance between the crest on the relative two sides of waveform groove, thereby the bending curvature that is held on first signal optical fibre between crest is changed; This makes the bending loss of first signal optical fibre change again; Can obtain the size that the first signal optical fibre bending loss changes through test cell, and pass to processing unit, processing unit is extrapolated the size of the suffered stress of cylinder.Because there are the crest and the trough of numerous mutual correspondences in the relative both sides of the waveform groove on cylinder; Thereby the length of effective sweep of first signal optical fibre is prolonged greatly; Reduced the bending curvature of first signal optical fibre on the one hand; Improve the precision of this device on the other hand, also prolonged the serviceable life of first signal optical fibre simultaneously greatly.
The distribution arrangement of described waveform groove is horizontal, i.e. axial vertical with cylinder.
The distribution arrangement of described waveform groove is longitudinally, promptly with the axially parallel of cylinder.
The distribution arrangement of described waveform groove tilts, and promptly spends less than 90 greater than zero degree with the axial angle of cylinder.
There is two or more waveform groove to be distributed on the cylinder.
Two or more waveform groove is parallel to each other.
Described waveform groove is distributed on the cylinder with the mode of spiral.
Described waveform groove is distributed on the outside surface of cylinder.
Described waveform groove is distributed on the inside surface of cylinder.
Described waveform groove is the structure that is contained in column body.
Between the crest of the relative both sides in the described waveform groove, with first signal optical fibre side by side clamping secondary signal optical fiber is arranged.
Crest top in the described waveform groove is fluted, and like V-shaped groove, first signal optical fibre is placed in this groove.
The width of described waveform groove is identical from the end to end of cylinder.
The width of described waveform groove changes from the end to end of cylinder.
Changing from the curvature on an end to the other end of cylinder, the height that is distributed in the crest in the waveform groove on the cylinder, corrugation pitch or crest top, is that increasing or decreasing, corrugation pitch are that the curvature on increasing or decreasing, crest top is increasing or decreasing like crest height.
Described first signal optical fibre or secondary signal optical fiber are coated by waterproof material.
Described waterproof material is a greasy for preventing water.
Said first signal optical fibre or secondary signal optical fiber are for the outside optical fiber that is surrounded by multi-protective layer, like tight tube fiber, carbon coated fiber, polyimide coated optical fiber etc.; Said first signal optical fibre or secondary signal optical fiber also can be plastic optical fiber, multi-core fiber, thin footpath optical fiber or photonic crystal fiber.
The present invention compared with prior art has the following advantages:
1, a kind of waveform groove cylinder fibre-optical sensing device; Be that cylinder and optical fiber micro-bending structure are combined; Give full play to the advantage of each self-structure, and complement each other, make simple in structure, sturdy and durable, reasonable in design, the easy to operate and use-pattern of this sensor flexible, highly sensitive;
2, a kind of waveform groove cylinder fibre-optical sensing device; Can design suitable optical fiber micro-bending structure as required; Comprise the effective bending length that increases by first signal optical fibre or secondary signal optical fiber, thereby increased the precision and the sensitivity that detect on the one hand, and can reduce the bending curvature of first signal optical fibre or secondary signal optical fiber; Thereby prolonged the serviceable life of first signal optical fibre or secondary signal optical fiber, made this fibre-optical sensing device have long service life, characteristics that precision is high;
3, a kind of waveform groove cylinder fibre-optical sensing device is owing to can adopt the optical fiber micro-bending structure that increases by first signal optical fibre or secondary signal fiber lengths; Thereby can make this device can respond bigger stress and bigger stress distance, expand the usable range of this device;
4, the cylinder in a kind of waveform groove cylinder fibre-optical sensing device can be reinforcing bar, rod iron or steel pipe through special processing; Or other robust materials; Be placed on the massif and rock mass that maybe need monitor in the buildings; Because this structure has stronger adaptive capacity to environment and high-sensitive monitoring property, so be a kind of good stress monitoring sensor;
5, the cylinder in a kind of waveform groove cylinder fibre-optical sensing device can be that compound substance constitutes, and constitutes like materials such as steel and plastic composite material, glass fiber reinforced plastics, from can effectively adapting to the demand of actual engineering specifications.
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; The advantage of having compiled cylinder and optical fiber micro-bending structure; And its advantage that has is further amplified, make device of the present invention have better precision, longer serviceable life and more excellent adaptive capacity to environment.
Through accompanying drawing and embodiment, the technical scheme of invention is done further detailed description below.
Description of drawings
Fig. 1 is the structural representation of the present invention's first embodiment.
Fig. 2 is the cross-sectional view of the A-A ' on cylinder edge among Fig. 1.
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:
1-extended fiber; 4-waveform groove; 5-test cell; 6-the first signal optical fibre;
7-processing unit; 8-secondary signal optical fiber; 10-cylinder; 12-groove.
Embodiment
Like Fig. 1, shown in Figure 2; Present invention resides in and be distributed with waveform groove 4 on the cylinder 10; The crest and the trough that have interlaced correspondence on the relative two sides of waveform groove 4 respectively; And between the crest on the relative two sides of waveform groove 4, accompany first signal optical fibre, 6, the first signal optical fibres 6 and connect test cell 5, connect processing unit 7 in test cell 5 back through extended fiber 1.
Preferably; Described cylinder 10 is right cylinders, when cylinder 10 is out of shape under stress, and the change width of waveform groove 4; Distance between the crest on the relative two sides of waveform groove 4 also can be changed; Thereby the bending curvature that is held on first signal optical fibre 6 between crest is changed, and this makes the bending loss of first signal optical fibre 6 change again, can obtain the size that first signal optical fibre, 6 bending losss change through test cell 5; And passing to processing unit 7, processing unit 7 is extrapolated the size of cylinder 10 suffered stress.Because there are the crest and the trough of numerous mutual correspondences in the relative both sides of the waveform groove 4 on cylinder 10; Thereby the length of effective sweep of first signal optical fibre 6 is prolonged greatly; Reduced the bending curvature of first signal optical fibre 6 on the one hand; Improve the precision of this device on the other hand, also prolonged the serviceable life of first signal optical fibre 6 simultaneously greatly.
Preferably described waveform groove 4 is distributed in the inside of outside surface, inside surface or the cylinder 10 of cylinder 10 with spirality.
Preferably, have two or more waveform groove 4 to be laid on the cylinder 10, further preferably many waveform groove 4 are parallel to each other.
A kind of preferred way is that the width of described waveform groove 4 is identical from the end to end of cylinder.
A kind of preferred way is that the width of described waveform groove 4 changes from the end to end of cylinder, can further strengthen the deformation range of cylinder 10 like this.
The material of described cylinder 10 is stainless steel, macromolecular material, Cu alloy material or compound substance.
Changing from an end to the other end of cylinder 10, the curvature that is distributed in height, corrugation pitch or the crest top of the crest in the waveform groove 4 on the cylinder 10, is that increasing or decreasing, corrugation pitch are that the curvature on increasing or decreasing, crest top is increasing or decreasing like crest height.
Said first signal optical fibre 6 is for the outside optical fiber that is surrounded by multi-protective layer, like tight tube fiber, carbon coated fiber, polyimide coated optical fiber etc.; Said first signal optical fibre 6 also can be plastic optical fiber, multi-core fiber, thin footpath optical fiber or photonic crystal fiber; Or many first signal optical fibres 6 are held between the crest of waveform groove 4 opposite faces side by side, or many first signal optical fibres 6 are merged into signal optical fibre bundle or signal optical fibre band through resin.
Said first signal optical fibre 6 is covered with waterproof material with extended fiber 1 external packets, like waterproofing unction, can further prevent the erosion of hydrone to first signal optical fibre 6 and extended fiber 1, has prolonged the serviceable life of first signal optical fibre 6 and extended fiber 1.
Embodiment 2
As shown in Figure 3, in the present embodiment, different with embodiment 1 is: the crest top in the described waveform groove 4 is fluted 12, and preferred, described groove 12 is V-shaped grooves, and first signal optical fibre 6 is placed in this groove.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, different with embodiment 1 is: between the crest of the relative both sides in the described waveform groove 4, with first signal optical fibre 6 side by side clamping secondary signal optical fiber 8 is arranged.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 done any restriction, every technical spirit changes any simple modification, change and the equivalent structure that above embodiment did according to the present invention, all still belongs in the protection domain of technical scheme of the present invention.
Claims (10)
1. waveform groove cylinder fibre-optical sensing device; It is characterized in that: on cylinder (10), be distributed with waveform groove (4); The crest and the trough that have interlaced correspondence on the relative two sides of waveform groove (4) respectively; And between the crest on the relative two sides of waveform groove (4), accompany first signal optical fibre (6), first signal optical fibre (6) connects test cell (5) through extended fiber (1), connects processing unit (7) in test cell (5) back.
2. according to the described a kind of waveform groove cylinder fibre-optical sensing device of claim 1, it is characterized in that: have two or more waveform groove (4) to be laid on the cylinder (10).
3. according to the described a kind of waveform groove cylinder fibre-optical sensing device of claim 2, it is characterized in that: two or more waveform groove (4) is parallel to each other.
4. according to the described a kind of waveform groove cylinder fibre-optical sensing device of claim 1, it is characterized in that: described waveform groove (10) is distributed on the cylinder (10) with the mode of spiral.
5. according to the described a kind of waveform groove cylinder fibre-optical sensing device of claim 1, it is characterized in that: the width of described waveform groove (4) is identical from the end to end of cylinder (10).
6. according to the described a kind of waveform groove cylinder fibre-optical sensing device of claim 1, it is characterized in that: the width of described waveform groove (4) changes from the end to end of cylinder (10).
7. according to the described a kind of waveform groove cylinder fibre-optical sensing device of claim 1, it is characterized in that: from an end to the other end of cylinder (10), be distributed in cylinder (10) and go up the curvature on height, corrugation pitch or the crest top of the crest in the waveform groove (4) and change.
8. according to the described a kind of waveform groove cylinder fibre-optical sensing device of claim 1, it is characterized in that: the crest top in the described waveform groove (4) fluted (12).
9. according to the described a kind of waveform groove cylinder fibre-optical sensing device of claim 1, it is characterized in that: between the crest of the relative both sides in the described waveform groove (4), with first signal optical fibre (6) side by side clamping secondary signal optical fiber (8) is arranged.
10. according to the described a kind of waveform groove cylinder fibre-optical sensing device of claim 1, it is characterized in that: described first signal optical fibre (6) is coated by waterproof material.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101581357A CN102829901A (en) | 2011-06-14 | 2011-06-14 | Optical fiber sensing device waveform grooves and cylinder body |
| PCT/CN2011/077411 WO2012010099A1 (en) | 2010-07-21 | 2011-07-21 | Optic fiber cylinder sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101581357A CN102829901A (en) | 2011-06-14 | 2011-06-14 | Optical fiber sensing device waveform grooves and cylinder body |
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| CN102829901A true CN102829901A (en) | 2012-12-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011101581357A Pending CN102829901A (en) | 2010-07-21 | 2011-06-14 | Optical fiber sensing device waveform grooves and cylinder body |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106441661A (en) * | 2016-12-02 | 2017-02-22 | 西南交通大学 | Fiber grating force-measuring gasket and anchor rod force-measuring system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3205798A1 (en) * | 1982-02-18 | 1983-08-25 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Fibre-optic phase modulator |
| CN87107210A (en) * | 1986-10-30 | 1988-08-03 | 巴布科克和威尔科斯公司 | Microbend fiber optic strain gauge |
| CN101865665A (en) * | 2010-04-06 | 2010-10-20 | 西安金和光学科技有限公司 | Measurement device and method of optical fiber bending parameter |
| CN101900617A (en) * | 2010-07-14 | 2010-12-01 | 西安金和光学科技有限公司 | Optical fiber type non-invasive pipeline pressure sensor |
| CN201772967U (en) * | 2010-07-21 | 2011-03-23 | 西安金和光学科技有限公司 | Fiber stress sensing device based on corrugated pipe |
| CN201819759U (en) * | 2010-09-03 | 2011-05-04 | 西安金和光学科技有限公司 | Cylinder stress sensing device |
| CN202141547U (en) * | 2011-06-14 | 2012-02-08 | 西安金和光学科技有限公司 | Cylinder optical fiber sensing device with waveform groove |
-
2011
- 2011-06-14 CN CN2011101581357A patent/CN102829901A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3205798A1 (en) * | 1982-02-18 | 1983-08-25 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Fibre-optic phase modulator |
| CN87107210A (en) * | 1986-10-30 | 1988-08-03 | 巴布科克和威尔科斯公司 | Microbend fiber optic strain gauge |
| CN101865665A (en) * | 2010-04-06 | 2010-10-20 | 西安金和光学科技有限公司 | Measurement device and method of optical fiber bending parameter |
| CN201697734U (en) * | 2010-04-06 | 2011-01-05 | 西安金和光学科技有限公司 | Spring type high precision optical fiber sensor based on optical fiber bending loss |
| CN101900617A (en) * | 2010-07-14 | 2010-12-01 | 西安金和光学科技有限公司 | Optical fiber type non-invasive pipeline pressure sensor |
| CN201772967U (en) * | 2010-07-21 | 2011-03-23 | 西安金和光学科技有限公司 | Fiber stress sensing device based on corrugated pipe |
| CN201819759U (en) * | 2010-09-03 | 2011-05-04 | 西安金和光学科技有限公司 | Cylinder stress sensing device |
| CN202141547U (en) * | 2011-06-14 | 2012-02-08 | 西安金和光学科技有限公司 | Cylinder optical fiber sensing device with waveform groove |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106441661A (en) * | 2016-12-02 | 2017-02-22 | 西南交通大学 | Fiber grating force-measuring gasket and anchor rod force-measuring system |
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Application publication date: 20121219 |