CN202141547U - Cylinder optical fiber sensing device with waveform groove - Google Patents
Cylinder optical fiber sensing device with waveform groove Download PDFInfo
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- CN202141547U CN202141547U CN201120198283U CN201120198283U CN202141547U CN 202141547 U CN202141547 U CN 202141547U CN 201120198283 U CN201120198283 U CN 201120198283U CN 201120198283 U CN201120198283 U CN 201120198283U CN 202141547 U CN202141547 U CN 202141547U
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Abstract
The utility model discloses a cylinder optical fiber sensing device with a waveform groove. The waveform groove (4) is distributed on a cylinder (10), wave crests and wave troughs which correspond to each other in staggered mode are arranged on two opposite faces of the waveform groove (4) respectively, and a first signal optical fiber (6) is clamped between the wave crests on the two opposite faces of the waveform groove (4). When the cylinder (10) is transformed under stress, the distance between the wave crests on two opposite sides in the waveform groove (4) on the cylinder (10) changes, so that bending curvature of the first signal optical fiber (6) clamped between the two wave crests changes to enable bending loss of the first signal optical fiber (6) to change, and stress received by the cylinder (10) can be calculated through a measuring unit (5) and a processing unit (7). Organic combination of the cylinder (10) and the waveform groove (4) with a slightly curved structure forms the novel sensing device.
Description
Technical field
The utility model belongs to the fiber stress sensing device, especially relates to a kind of bar shape stress sensing device that changes based on fiber microbending loss.
Background technology
Because 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 utility model.
Summary of the invention
In order to overcome the deficiency of above-mentioned prior art; The utility model provides a kind of fiber stress sensing device that on damaged surface, is distributed with waveform 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; When secondary signal optical fiber is arranged, can also obtain the direction of stress.Make the optical fiber stress monitoring device of the utility model have long service life, precision is high, purposes is wide characteristics.
For solving the problems of the technologies described above; The technical scheme that the utility model 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 utility model 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 utility model 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 the device of the utility model have better precision, longer serviceable life and more excellent adaptive capacity to environment.
Through accompanying drawing and embodiment, the technical scheme of utility model is done further detailed description below.
Description of drawings
Fig. 1 is the structural representation of the utility model 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 utility model second embodiment.
Fig. 4 is the structural representation of the utility model 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; The utility model is included in and is 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.
When cylinder 10 is out of shape under stress; The change width of waveform groove 4 also can change the distance between the crest on the relative two sides of waveform groove 4, thereby the bending curvature that is held on first signal optical fibre 6 between crest is changed; 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 pass 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 cylinder 10 is right cylinders.
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 the preferred embodiment of the utility model; Be not that the utility model is done any restriction; Everyly any simple modification that above embodiment did, change and equivalent structure are changed, all still belong in the protection domain of the utility model technical scheme according to the utility model technical spirit.
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 (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120198283U CN202141547U (en) | 2011-06-14 | 2011-06-14 | Cylinder optical fiber sensing device with waveform groove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120198283U CN202141547U (en) | 2011-06-14 | 2011-06-14 | Cylinder optical fiber sensing device with waveform groove |
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| Publication Number | Publication Date |
|---|---|
| CN202141547U true CN202141547U (en) | 2012-02-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120198283U Expired - Fee Related CN202141547U (en) | 2011-06-14 | 2011-06-14 | Cylinder optical fiber sensing device with waveform groove |
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| CN (1) | CN202141547U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102829901A (en) * | 2011-06-14 | 2012-12-19 | 西安金和光学科技有限公司 | Optical fiber sensing device waveform grooves and cylinder body |
| CN115266076A (en) * | 2022-09-26 | 2022-11-01 | 中交第一公路勘察设计研究院有限公司 | Plate type support based on optical fiber sensing, monitoring system and mounting and monitoring method |
-
2011
- 2011-06-14 CN CN201120198283U patent/CN202141547U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102829901A (en) * | 2011-06-14 | 2012-12-19 | 西安金和光学科技有限公司 | Optical fiber sensing device waveform grooves and cylinder body |
| CN115266076A (en) * | 2022-09-26 | 2022-11-01 | 中交第一公路勘察设计研究院有限公司 | Plate type support based on optical fiber sensing, monitoring system and mounting and monitoring method |
| CN115266076B (en) * | 2022-09-26 | 2023-01-20 | 中交第一公路勘察设计研究院有限公司 | Plate type support based on optical fiber sensing, monitoring system and mounting and monitoring method |
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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: 20120208 Termination date: 20120614 |