CN201819759U - Cylinder stress sensing device - Google Patents
Cylinder stress sensing device Download PDFInfo
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- CN201819759U CN201819759U CN2010205165667U CN201020516566U CN201819759U CN 201819759 U CN201819759 U CN 201819759U CN 2010205165667 U CN2010205165667 U CN 2010205165667U CN 201020516566 U CN201020516566 U CN 201020516566U CN 201819759 U CN201819759 U CN 201819759U
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Abstract
The utility model discloses a cylinder stress sensing device. Two lines of deformation teeth are distributed in seams (4) distributed on a cylinder (10), and a signal optical fiber (6) is clamped among the deformation teeth. When the cylinder (10) deforms under stress, the distance between the two lines of deformation teeth inside the seams (4) on the cylinder (10) can change so that the bending curvature of the signal optical fiber (6) clamped between the two lines of deformation teeth changes to cause change of bending loss of the signal optical fiber (6), and the stress on the cylinder (10) can be calculated by the aid of a testing unit (5) and a processing unit (7). When the cylinder stress sensing device is provided with a second signal optical fiber (8), parameters of deformation teeth corresponding to the signal optical fiber (8) are different from those of the deformation teeth corresponding to the signal optical fiber (6), and the direction of the stress on the cylinder (10) can be calculated by obtaining data of the two optical fibers at the same moment. Accordingly, the novel sensing device is formed by organically combining the cylinder (10) with a micro-bending structure.
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.Along with going deep into and development of fiber technology that optical fiber is 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 Chinese patent application number 200410073021.2 " flush type microbend fiber sensor and microbend fiber sensor are imbedded and method of testing "; the snakelike microbend fiber sensor that a kind of more piece short sleeve that includes optical fiber constitutes has been proposed; form little curved point between its sleeve pipe; with respect to traditional sensor; its advantage is anti-electromagnetic interference (EMI); be applicable to the detection of multiple rock mass; the measuring accuracy height; can realize distributed monitoring; but in this scheme; the bending curvature of the little curved point that forms between sleeve pipe is at random; also may be bigger; also may be less; when curvature is too small; the intensity of optical fiber will be affected; even ruptured soon; cause 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; may lose condition again with little curved detection; perhaps need special device to protect, increased cost again virtually.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 above-mentioned the deficiencies in the prior art, the utility model provides a kind of fiber stress sensing device based on cylinder, what adopt is prefabricated optical fiber micro-bending structure, not only can monitor the variation of stress, can calculate simultaneously the size of stress, when secondary signal optical fiber is arranged, can also obtain the direction of stress.Make optical fiber stress monitoring device of the present utility model have long service life, precision height, characteristics that purposes is wide.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of cylinder stress sensing apparatus, it is characterized in that: on cylinder 10, be distributed with slit 4, be laid with A side distortion tooth 4-1 and B side distortion tooth 4-2 on the relative two sides in slit 4 respectively, A side distortion tooth 4-1 and the interlaced correspondence of B side distortion tooth 4-2, A side distortion tooth 4-1 and B side distortion tooth 4-2 correspondence are laid in the both sides of signal optical fibre 6, signal optical fibre 6 connects test cell 5 by extended fiber 1, connects processing unit 7 in test cell 5 back.
When cylinder 10 is out of shape under stress, the wide variety in slit 4, distance between distortion tooth 4-1 of the A side on the relative two sides in slit 4 and B side distortion tooth 4-2 also can be changed, be held on the bending curvature variation that both are out of shape the signal optical fibre 6 of between cog thereby make, this makes the bending loss of signal optical fibre 6 change again, can obtain the size that signal optical fibre 6 bending losss change by test cell 5, and pass to processing unit 7, processing unit 7 is extrapolated the size of cylinder 10 suffered stress.Owing on cylinder 10, be laid with the distortion tooth of numerous mutual correspondences, thereby the length of effective sweep of signal optical fibre 6 is prolonged greatly, reduce the bending curvature of signal optical fibre 6 on the one hand, improved the precision of this device on the other hand, also prolonged the serviceable life of signal optical fibre 6 simultaneously greatly.
The distribution arrangement in described slit 4 is horizontal, i.e. axial vertical with cylinder 10.
The distribution arrangement in described slit 4 is longitudinally, promptly with the axially parallel of cylinder 10.
The distribution arrangement in described slit 4 tilts, and promptly spends less than 90 greater than zero degree with the axial angle of cylinder 10.
Described slit 4 is distributed on the cylinder 10 in the mode of spiral.
Described slit 4 is distributed on the outside surface of cylinder 10.
Described slit 4 is distributed on the inside surface of cylinder 10.
Described slit 4 is the structures that are contained in cylinder 10 inside.
The width in described slit 4 changes from the end to end of cylinder 10.
The relation of the expansion coefficient of described cylinder 4 and distortion tooth can the compensation temperature effect, and preferably the expansion coefficient of cylinder 10 is slightly larger than the expansion coefficient of distortion tooth.
The material of described cylinder 10 is stainless steel, macromolecular material, Cu alloy material.
End at described signal optical fibre 6 is mounted with light reflecting device, as light reflection mirror, fiber grating or at the end face plating reflectance coating of signal optical fibre, or only is that end face with signal optical fibre is treated to minute surface.
The other end of described signal optical fibre 61 mouthful by extended fiber 1 and 1X2 optical branching device is connected 2 mouthfuls of stabilized light source and light power meters that connect formation test cell 5 respectively of 1X2 optical branching device.
From an end of cylinder 10 to the other end, the tooth depth, tooth pitch or the profile of tooth that are distributed in the distortion tooth in the slit 4 on the cylinder 10 change, and is that increasing or decreasing, tooth pitch are that the curvature on increasing or decreasing, profile of tooth top is increasing or decreasing as tooth depth.
Described cylinder 10 is mandrel connectors.
The part of signal optical fibre 6 or signal optical fibre 8 is not held by the described distortion toothholders that are distributed in the slit on the cylinder 10 4, or this part does not have corresponding distortion tooth, the signal optical fibre 6 or the signal optical fibre 8 of this part are buffered optical fibers, are the variations that is used to receive or compensate remainder signal optical fibre 6 or signal optical fibre 8 fiber lengths when flexural deformation.
Described signal optical fibre 6 or signal optical fibre 8 are coated by waterproof material.
Described waterproof material is a greasy for preventing water.
Described signal optical fibre 6 or signal optical fibre 8 are 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 or signal optical fibre 8 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 cylinder stress sensing apparatus, be that cylinder 10 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 cylinder stress sensing apparatus, can design suitable optical fiber micro-bending structure as required, comprise the effective bending length that increases signal optical fibre 6 or signal optical fibre 8, thereby the precision and the sensitivity that detect have been increased on the one hand, and can reduce the bending curvature of signal optical fibre 6 or signal optical fibre 8, thereby prolonged the serviceable life of signal optical fibre 6 or signal optical fibre 8, made this fibre-optical sensing device have long service life, characteristics that precision is high;
3, a kind of cylinder stress sensing apparatus be owing to can adopt the optical fiber micro-bending structure that increases signal optical fibre 6 or signal optical fibre 8 length, thereby can make this device can respond bigger stress and bigger stress distance, expanded the usable range of this device.
4, the cylinder 10 in a kind of cylinder stress sensing apparatus can be a mandrel connector, can monitor the size of output torque or moment of torsion.
5, the cylinder 10 in a kind of cylinder stress sensing apparatus can be reinforcing bar, rod iron or the 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, with high-sensitive monitoring, so be a kind of good stress monitoring sensor.
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, compiled the advantage of cylinder 10 with the optical fiber micro-bending structure, and its advantage that has is further amplified, make device of the present utility model have better precision, longer serviceable life and more excellent adaptive capacity to environment.
Below by drawings and Examples, the technical scheme of utility model is described in further detail.
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 in the utility model first embodiment.
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-slit; 4-1-A side distortion tooth;
4-2-B side distortion tooth; 5-test cell; 6-signal optical fibre;
7-processing unit; 8-secondary signal optical fiber; 10-cylinder;
4-3-the 2nd A side distortion tooth; 4-4-the 2nd B side distortion tooth.
Embodiment
Embodiment 1
As shown in Figure 1 and Figure 2, the utility model comprises that being laid with the A side on relative two faces in the slit 4 of the outside surface of cylinder 10 respectively is out of shape tooth 4-1 and B side distortion tooth 4-2, A side distortion tooth 4-1 and the interlaced correspondence of B side distortion tooth 4-2, A side distortion tooth 4-1 and B side distortion tooth 4-2 correspondence are laid in the both sides of signal optical fibre 6, signal optical fibre 6 connects test cell 5 by extended fiber 1, and test cell 5 back are connected to processing unit 7.
When cylinder 10 under stress during dilatation, distance between A side distortion tooth 4-1 in the slit 4 on the outside surface of cylinder 10 and the B side distortion tooth 4-2 also can change, be held on the bending curvature variation that both are out of shape the signal optical fibre 6 of between cog thereby make, this makes the bending loss of signal optical fibre 6 change again, can obtain the size that signal optical fibre 6 bending losss change by test cell 5, test cell 5 is given processing unit 7 with data transfer, and processing unit 7 is extrapolated the size of cylinder 10 suffered stress.Owing to be laid with the distortion tooth of numerous mutual correspondences in the slit 4 on the outside surface of cylinder 10, thereby effective bending length of signal optical fibre 6 is prolonged greatly, reduced the bending curvature of signal optical fibre 6 on the one hand, improve the precision of this device on the other hand, also prolonged the serviceable life of signal optical fibre 6 simultaneously greatly.
Some is as buffered optical fibers to a kind of preferred way in signal optical fibre 6, promptly there is not corresponding distortion tooth near the signal optical fibre 6 of this part, when signal optical fibre 6 bending curvatures changed, buffered optical fibers received or the variation of the length of compensating signal optical fiber 6.
When the flexural deformation parameter of monitoring cylinder 10, a kind of way is with the distortion teeth in 4 remove along the slit in the zone of cylinder 10 certain direction radially, and this regional signal optical fibre 6 can monitor the direction of cylinder 10 distortion like this as buffered optical fibers.
Described slit 4 can be the inside of the spirality outside surface, inside surface or the cylinder 10 that are distributed in cylinder 10.Slit 4 also can be distributed on the cylinder 10 in many parallel modes.
Described cylinder 10 is mandrel connectors, can monitor torsion, moment of torsion, angular acceleration and the rotating speed of axle rotation simultaneously.
The width in described slit 4 changes from the end to end of cylinder, can further strengthen the deformation range of cylinder 10 like this.
By selecting suitable material that the distortion of cylinder 10 and distortion tooth temperature influence can be cancelled out each other or partial offset, thereby the influence that compensation temperature is brought, expansion coefficient as cylinder 10 is a bit larger tham the expansion coefficient that is out of shape tooth, when temperature raises, cylinder 10 overall elongated, the width in slit 4 is increased slightly, the rising of simultaneous temperature also makes the height of distortion tooth also extend a little, both variations can compensate certain temperature effect as can be seen, and the material of the suitable expansion coefficient by selecting both can reduce temperature effect as much as possible.
The material of described cylinder 10 is stainless steel, macromolecular material, Cu alloy material.
End at described signal optical fibre 6 can be mounted with light reflecting device, as light reflection mirror, fiber grating or at the end face plating reflectance coating of signal optical fibre, or only is that end face with signal optical fibre is treated to minute surface.
The other end of described signal optical fibre 61 mouthful by extended fiber 1 and 1X2 optical branching device is connected 2 mouthfuls of stabilized light source and light power meters that connect formation test cell 5 respectively of 1X2 optical branching device.
From an end of cylinder 10 to the other end, the tooth depth, tooth pitch or the profile of tooth that are distributed in the distortion tooth in the slit 4 on the cylinder 10 change, as tooth depth is that increasing or decreasing, tooth pitch are that the curvature on increasing or decreasing, profile of tooth top is increasing or decreasing, can require to change according to reality, more increase the flexible use ability of this device.
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, multi-core fiber, thin footpath optical fiber or photonic crystal fiber; Or many signal optical fibres 6 are clamped in the distortion between cog side by side, or many signal optical fibres 6 are merged into signal optical fibre bundle or signal optical fibre band by resin.
Described signal optical fibre 6 and extended fiber 1 external packets are covered with waterproof material, as waterproofing unction, can further prevent the erosion of hydrone to signal optical fibre 6 and extended fiber 1, have prolonged the serviceable life of signal optical fibre 6 and extended fiber 1.
Embodiment 2
As shown in Figure 3, in the present embodiment, as different from Example 1: second group of distortion tooth is installed in slit 4, hold secondary signal optical fiber 8 at second group of distortion interdental splint, signal optical fibre 8 also connects test cell 5 by extended fiber, can accomplish putting on the test of stress direction to be measured on the cylinder 10 with signal optical fibre 6 distortion the different of tooth by the parameters such as tooth depth, tooth pitch or profile of tooth that make second group of distortion tooth, this device to test reliable results degree is improved.Some is as buffered optical fibers to a kind of preferred way in signal optical fibre 8, promptly there is not corresponding distortion tooth near the signal optical fibre 8 of this part, when signal optical fibre 8 bending curvatures changed, buffered optical fibers received or the variation of the length of compensating signal optical fiber 8.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: slit 4 vertically is distributed on the surface of cylinder 10, can monitor the parameter of reversing of cylinder 10 by test signal optical fiber 6 optical power change, as twisting resistance or moment, parameters such as windup-degree.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 utility model; be not that the utility model is imposed any restrictions; everyly any simple modification that above embodiment did, change and equivalent structure are changed, all still belong in the protection domain of technical solutions of the utility model according to the utility model technical spirit.
Claims (10)
1. cylinder stress sensing apparatus, it is characterized in that: on cylinder (10), be distributed with slit (4), be laid with A side distortion tooth (4-1) and B side distortion tooth (4-2) on the relative two sides in slit (4) respectively, A side distortion tooth (4-1) and the interlaced correspondence of B side distortion tooth (4-2), A side distortion tooth (4-1) and B side distortion tooth (4-2) correspondence are laid in the both sides of signal optical fibre (6), signal optical fibre (6) connects test cell (5) by extended fiber (1), connects processing unit (7) in test cell (5) back.
2. according to the described a kind of cylinder stress sensing apparatus of claim 1, it is characterized in that: have that many slits (4) are parallel to be distributed on the cylinder (10).
3. according to the described a kind of cylinder stress sensing apparatus of claim 1, it is characterized in that: described slit (4) are distributed on the cylinder (10) in the mode of spiral.
4. according to claim 1,2 or 3 described a kind of cylinder stress sensing apparatus, it is characterized in that: described slit (4) are distributed on the outside surface of cylinder (10).
5. according to claim 1,2 or 3 described a kind of cylinder stress sensing apparatus, it is characterized in that: described slit (4) are distributed on the inside surface of cylinder (10).
6. according to claim 1,2 or 3 described a kind of cylinder stress sensing apparatus, it is characterized in that: described slit (4) are to be contained in the inner structure of cylinder (10).
7. according to the described a kind of cylinder stress sensing apparatus of claim 1, it is characterized in that: the width of described slit (4) changes from the end to end of cylinder (10).
8. according to the described a kind of cylinder stress sensing apparatus of claim 1, it is characterized in that: the expansion coefficient of described cylinder (10) is greater than the expansion coefficient of distortion tooth.
9. according to the described a kind of cylinder stress sensing apparatus of claim 1, it is characterized in that: from an end of cylinder (10) to the other end, be distributed in cylinder (10) and go up tooth depth, tooth pitch or the profile of tooth of the distortion tooth in the slit (4) and change.
10. according to the described a kind of cylinder stress sensing apparatus of claim 1, it is characterized in that: the part of signal optical fibre (6) is not held by the described distortion toothholder that is distributed in the last slit (4) of cylinder (10), or this part do not have corresponding distortion tooth, and the signal optical fibre of this part (6) is a buffered optical fibers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205165667U CN201819759U (en) | 2010-09-03 | 2010-09-03 | Cylinder stress sensing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205165667U CN201819759U (en) | 2010-09-03 | 2010-09-03 | Cylinder stress sensing device |
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| Publication Number | Publication Date |
|---|---|
| CN201819759U true CN201819759U (en) | 2011-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205165667U Expired - Fee Related CN201819759U (en) | 2010-09-03 | 2010-09-03 | Cylinder stress sensing device |
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| Country | Link |
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| CN (1) | CN201819759U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012010099A1 (en) * | 2010-07-21 | 2012-01-26 | 西安金和光学科技有限公司 | Optic fiber cylinder sensor |
| CN102384804A (en) * | 2010-09-03 | 2012-03-21 | 西安金和光学科技有限公司 | Sensing device for cylinder stress |
| 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 |
-
2010
- 2010-09-03 CN CN2010205165667U patent/CN201819759U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012010099A1 (en) * | 2010-07-21 | 2012-01-26 | 西安金和光学科技有限公司 | Optic fiber cylinder sensor |
| CN102384804A (en) * | 2010-09-03 | 2012-03-21 | 西安金和光学科技有限公司 | Sensing device for cylinder stress |
| CN102384804B (en) * | 2010-09-03 | 2014-12-24 | 西安金和光学科技有限公司 | Sensing device for cylinder stress |
| 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 |
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| C14 | Grant of patent or utility model | ||
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110504 Termination date: 20120903 |