CN102235884A - Spiral optical fiber sensing device based on bending deformation of optical fiber - Google Patents
Spiral optical fiber sensing device based on bending deformation of optical fiber Download PDFInfo
- Publication number
- CN102235884A CN102235884A CN2010101564465A CN201010156446A CN102235884A CN 102235884 A CN102235884 A CN 102235884A CN 2010101564465 A CN2010101564465 A CN 2010101564465A CN 201010156446 A CN201010156446 A CN 201010156446A CN 102235884 A CN102235884 A CN 102235884A
- Authority
- CN
- China
- Prior art keywords
- fibre
- optical
- sensing device
- optical fiber
- bending deformation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Optical Transform (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses a spiral optical fiber sensing device based on the bending deformation of an optical fiber. The optical fiber has a spiral multi-ring structure, so that the effective action length of the signal optical fiber is greatly prolonged; a plurality of opposite grooves are formed between an inner cylinder and a shell outside the inner cylinder, so that the dynamic range of the optical fiber sensing device is expanded under the condition that the bending curvature deformation of the signal optical fiber is greatly reduced; and different physical quantities are sensed by selecting different materials of the inner cylinder and the shell, so that the optical fiber sensing device can be applied to more occasions. The optical fiber sensing device has a simple structure, a reasonable design, high sensitivity, long service life, a good using effect and a wide application prospect, is convenient to process and manufacture and flexible in use, and can measure various physical quantities through extension.
Description
Technical field
The present invention relates to a kind of fibre-optical sensing device of field of sensing technologies, specifically is a kind of fibre-optical sensing device based on the physical quantity test of the screw type of fibre-optical bending deformation that is distributed between inner prop body and housing that comprises.
Background technology
The kind of existing fiber sensor is very many, and optical fiber micro-bending sensor is still the Fibre Optical Sensor of a kind of very potentialization that present cost is low, precision is high, microbend sensor is from proposing that the history in two, 30 years has been arranged till now, but, even rarely seenly there is ripe business-like product to appear on the market because unreasonable on the structural design causes that the type sensor is not in enormous quantities to be used.
In " Chengdu Univ. of Science ﹠ Technology's journal " 3 phases of nineteen ninety, the total the 51st interim 65-70 page or leaf has " optical fiber micro-bending sensor structure and performance study thereof ", introduced a kind of screw type optical fiber micro-bending sensor in this article, synoptic diagram is seen Fig. 1, Fig. 2, screw type anamorphoser 1 is the threaded cylinder of an aluminum, cylinder upper edge cylinder vertically has four arcuate furrows 4, signal optical fibre 10 is wrapped in the screw thread 7 tooth paddy, elastic body 3 is rubber cases that tightly are enclosed within on the drum surface, light source 5-1 is input to light signal in the signal optical fibre 10, another termination photo-detector 5-2 of signal optical fibre 10, do the time spent when being subjected to external force, rubber on the groove produces distortion in groove, thereby the signal optical fibre of compressing relevant position curves inwardly for 10 sections, pressure is big more, signal optical fibre 10 amplitude that curves inwardly is big more, signal optical fibre 10 radius-of-curvature are more little, microbending loss is big more, the optical signal power of transmission changes and should change by photo-detector 5-2 perception in the signal optical fibre 10, when the external force cancellation, after rubber case recovered, signal optical fibre 10 was by the recovery of elasticity original shape of self.The sensing body of this Fibre Optical Sensor is a screw type, and the optical fiber number of turns is many, and optical fiber is long, so its sensitivity and test specification are apparently higher than other general microbend sensors.But this sensor has adopted elastic body 3, many and hour at the groove of screw type anamorphoser 1, when stressed, temperature to external world, the elastic body 3 of air pressure sensitivity also can change and make signal optical fibre 10 crooked and the interference and the error of test result occur along with the groove of screw type anamorphoser 1, the increase of the groove number of the yielding meeting restriction screw type anamorphoser 1 of the high-elastic gonosome 3 of rubber case class and the minimizing of gash depth, and groove number and gash depth are the keys of giving full play to little curved Fibre Optical Sensor performance, the high-elastic gonosome 3 of rubber case class is in serviceable life in addition, the homogeneity of internal density and meticulous machining aspect all exist obvious defects, thereby have limited the raising of this sensor accuracy and the expansion of usable range.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the invention provides a kind of screw type fibre-optical sensing device based on fibre-optical bending, this sensor construction is simple, reasonable in design, method of operating convenient and use-pattern is flexible, have certain environment interference, highly sensitive, makes this Fibre Optical Sensor have wide usable range; And can utilize time division technique, optical time domain reflection technology (OTDR) and coincidence frequency modulated continuous wave technology (FMCW) can realize quasi-distributed or distributed measurement, for the application of Fibre Optical Sensor of the present invention further provides boundless application prospect.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of screw type fibre-optical sensing device based on fibre-optical bending deformation, it is characterized in that: the housing of inner prop body and interior cylindrical external body, distribute a plurality of grooves on the surface of inner prop body along the longitudinal, longitudinally also be distributed with a plurality of grooves on the inside surface of the housing of interior cylindrical external body, and the groove on the inside surface of the groove on the interior cylindrical surface and the housing of interior cylindrical external body is staggered corresponding, on the interior cylindrical surface, laterally be wound with signal optical fibre, signal optical fibre is clamped between the ditch ridge of groove on the shell inner surface of the ditch ridge of groove on the interior cylindrical surface and interior cylindrical external body, and the extension optical fiber of signal optical fibre connects test cell.
When physical quantity such as temperature variation, variable in distance between the housing of inner prop body and interior cylindrical external body, thereby the bending curvature of the signal optical fibre between the ditch ridge of groove on the shell inner surface of the ditch ridge that is clamped in groove on the interior cylindrical surface and interior cylindrical external body is changed, thereby make the variable power of the light signal of signal optical fibre internal transmission, the variation that the extension optical fiber of test cell by signal optical fibre obtains light signal comes perception physical quantity such as variation of temperature.
Test cell can be light source and light power meter, also can select for use optical time domain reflection technology (OTDR) and coincidence frequency modulated continuous wave technology (FMCW) to realize quasi-distributed or distributed measurement, or selects interferometer to carry out more high-precision measurement.
The scheme that Fibre Optical Sensor of the present invention solves further technical matters is: described interior cylindrical transversely is distributed with screw thread on the surface, and signal optical fibre is wrapped in the tooth paddy of screw thread, thereby the holding signal fiber position is fixing.
The scheme that Fibre Optical Sensor of the present invention solves further technical matters is: the housing of inner prop body and interior cylindrical external body is two kinds of different materials, when being temperature as the sensing physical quantity, the expansion coefficient difference of the housing of inner prop body and interior cylindrical external body, thus distance between the housing of inner prop body and interior cylindrical external body when temperature variation, changed.
The scheme that Fibre Optical Sensor of the present invention solves further technical matters is: one of them is magnetostriction materials or electrostriction material for the housing of inner prop body and interior cylindrical external body.
The scheme that Fibre Optical Sensor of the present invention solves further technical matters is: the inner prop body is quartzy.
The scheme that Fibre Optical Sensor of the present invention solves further technical matters is: the material of the housing of interior cylindrical external body is isotropic quartz glass.
The scheme that Fibre Optical Sensor of the present invention solves further technical matters is: the inner prop body of crystal material and isotropic quartz glass are positioned in the vacuum cavity jointly, prevent the influence of internal cylindrical body of factor such as temperature, air pressure and housing.
The scheme that Fibre Optical Sensor of the present invention solves further technical matters is: an end of signal optical fibre is mounted with light reflecting device.
The scheme that Fibre Optical Sensor of the present invention solves further technical matters is: 1 mouthful of the other end of signal optical fibre and 1X2 shunt is connected 2 mouthfuls of light signal input/output ports that connect test cell respectively of 1X2 shunt.
The scheme that Fibre Optical Sensor of the present invention solves further technical matters is: the light reflecting device of settling at an end of signal optical fibre is the grating type optical fiber reflection device.
The scheme that Fibre Optical Sensor of the present invention solves further technical matters is: the inner prop body is a cavity, as tubulose.
The scheme that Fibre Optical Sensor of the present invention solves further technical matters is: the inner prop body is cone-shaped, the inner chamber of the housing of interior cylindrical external body also is to be complementary with the cone-shaped of inner prop body, change both axial distances, then can change the bending curvature of signal optical fibre, thereby pass through the size of test cell perception axial displacement.
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, washing optical fiber or polyimide coating.
Described signal optical fibre is multi-core fiber, polarization fiber, dual mode optical fiber, high molecular polymer optical fiber or photonic crystal fiber.
The present invention compared with prior art has the following advantages:
1, simple in structure, processing and fabricating is convenient and version is various, and use-pattern is flexible.
2, use easy and simple to handle and each inter-module annexation is reasonable in design, be wound in signal optical fibre on the inner prop body by spirality, having increased greatly that signal optical fibre changes with physical quantity can crooked length, thereby on the basis that guarantees signal optical fibre life-span, has improved measuring accuracy.
3, by selecting material with different physical properties, can monitor different physical quantitys, the crystal material that selection has piezoelectric property as the inner prop body, housing is selected isotropic quartz glass, crystal has inverse piezoelectric effect when high voltage, the subtle change of quartzy volume changes the bending curvature of signal optical fibre, thereby the loss of signal optical fibre internal transmission light signal is changed, and obtain this variation by test cell, thereby perceive voltage, the variation of electric current, also can be according to the variation of the deformation of signal optical fibre bending curvature, utilize test cell to obtain the size of signal optical fibre deformation quantity and the variation of sense voltage by interferometric method, particularly the extra-high pressure field has wide purposes in the electric power transfer field.
When 4, the inner prop body is tubular body, can be placed on the pipeline, the pressure of perception tube interior changes.
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, this sensor construction is simple, reasonable in design, method of operating convenient and use-pattern is flexible, have certain environment interference, highly sensitive, makes this Fibre Optical Sensor have wide usable range; And can utilize time division technique, optical time domain reflection technology (OTDR) and coincidence frequency modulated continuous wave technology (FMCW) can realize quasi-distributed or distributed measurement, for the application of Fibre Optical Sensor of the present invention further provides boundless application prospect.
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 embodiment of prior art.
Fig. 2 is the cross sectional representation of the embodiment of prior art.
Fig. 3 is the structural representation of the present invention's first embodiment.
Fig. 4 is along the cross-sectional view of A-A ' among Fig. 3.
Fig. 5 is the structural representation of the present invention's second embodiment.
Fig. 6 is the structural representation of the present invention's the 3rd embodiment.
Fig. 7 is along the cross-sectional view of B-B ' among Fig. 6.
Description of reference numerals:
| 1-screw type anamorphoser; | The 3-elastic body; | The 4-arcuate furrow; |
| The 5-1-light source; | The 5-2-photo-detector; | The 10-signal optical fibre; |
| 11-inner prop body; | The 12-housing; | The 20-outer chamber; |
| The 21-1X2 optical branching device; | The 22-test cell; | The 23-processing unit; |
| The 30-screw; | 35-shell inner surface groove; | 40-interior cylindrical external surface groove; |
| The 50-anchor clamps; | The 60-screw thread; | The 70-locating slot; |
| 80-extends optical fiber; | The 7-screw thread. | ? |
Embodiment
As Fig. 3, shown in Figure 4, the present invention includes the housing 12 that inner prop body 11 and inner prop body 11 outsides are arranged in the outer chamber 20, distribute a plurality of interior cylindrical external surface grooves 40 on the surface of inner prop body 11 along the longitudinal, longitudinally also be distributed with a plurality of shell inner surface grooves 35 on the inside surface of the housing 12 of inner prop body 11 outsides, and the shell inner surface groove 35 on the inside surface of interior cylindrical external surface groove 40 and the housing 12 of inner prop body 11 outsides is staggered corresponding, on inner prop body 11 surfaces, screw thread 60 is arranged laterally, in the tooth paddy of screw thread 60, be wound with signal optical fibre 10, signal optical fibre 10 is clamped between the ditch ridge of the ditch ridge of interior cylindrical external surface groove 40 and shell inner surface groove 35, the extension optical fiber 80 of signal optical fibre 10 connects test cell 22, connect processing unit 23 behind the test cell 22, housing 12 is divided into two parts, anchor clamps 50 are all arranged on each part, by screw 30 that two-part anchor clamps 50 are fixing and make housing 12 surround inner prop body 11.
When the physical quantity that needs perception is temperature, the housing 12 of inner prop body 11 and inner prop body 11 outsides is selected different materials, as 11 uses of inner prop body are the higher aluminums of expansion coefficient, the expansion coefficient of aluminium is every degree centigrade and is 23.8X10^ (6), what housing 12 was selected is No. 45 lower steel of expansion coefficient, the expansion coefficient of No. 45 steel is every degree centigrade and is 11.59X10^ (6), when temperature variation, both expansion coefficient differences, make the variable in distance between external 11 surfaces of interior cylindrical and housing 12 inside surfaces, thereby make the bending curvature variation of the signal optical fibre 10 between the ditch ridge of groove on housing 12 inside surfaces that are clamped in the ditch ridge of going up grooves in inner prop body 11 surface and inner prop body 11 outsides, thereby make the variable power of the light signal of signal optical fibre 10 internal transmission, the variation that test cell 22 obtains light signal by the extension optical fiber 80 of signal optical fibre 10, and this variation passed to the size that processing unit 23 comes sense temperature to change.
Described signal optical fibre 10 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 10 also can be plastic optical fiber or photonic crystal fiber; Signal optical fibre 10 also can be multi-core fiber, polarization fiber, dual mode optical fiber, high molecular polymer optical fiber or photonic crystal fiber.。
When inner prop body 11 is tubular body, be placed on the pipeline pressure of perception tube interior or temperature variation.
When many group inner prop bodies 11 and housing 12 are arranged, realize distributed measurement by using optical time domain reflection technology (0TDR) or coincidence frequency modulated continuous wave technology (FMCW).
Embodiment 2
As shown in Figure 5, in the present embodiment, as different from Example 1: an end of described signal optical fibre 10 is mounted with light reflecting device, another termination of signal optical fibre 10 is extended optical fiber 80, extension optical fiber 80 connects 1 mouthful of 1X2 shunt 21,2 mouthfuls of light input/output ports that connect test cell respectively of 1X2 shunt 21.In the present embodiment, the structure of remainder, annexation and principle of work are all identical with embodiment 1.
As Fig. 6, shown in Figure 7, in the present embodiment, as different from Example 2: described inner prop body 11 is a rectangular parallelepiped, on the surface of relative two faces of rectangular parallelepiped, locating slot 70 is arranged side by side, the part of signal optical fibre 10 is fixed in locating slot 70, in inner prop body 11 is lip-deep interior cylindrical external surface groove 40 arranged with locating slot 70 vertical distribution, with the staggered corresponding shell inner surface groove 35 that is laid on housing 12 inside surfaces of interior cylindrical external surface groove, signal optical fibre 10 is clamped between the ditch ridge of the ditch ridge of interior cylindrical external surface groove 40 and shell inner surface groove 35.
When inner prop body 11 is that quartzy, housing 12 is during for quartz glass, and when the X-direction of crystalline is parallel with B-B ', the variation of external voltage will cause X-direction flexible of inner prop body 11, and quartz glass does not change, thereby changed the distance between inner prop body 11 and the housing 12, the bending curvature of the signal optical fibre between the ditch ridge of the ditch ridge that is clamped in interior cylindrical external surface groove 40 and shell inner surface groove 35 is changed, obtain this variation from test cell 22, and draw the variation size of voltage by processing unit 23; Be further to reduce Temperature Influence, can vacuumize comprising in the outer chamber 20 of inner prop body 11 and housing 12.Certainly can also there be other shading facilities outer chamber 20 outsides.
In the present embodiment, the structure of remainder, annexation and principle of work are all identical with embodiment 2.
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 (12)
1. based on the screw type fibre-optical sensing device of fibre-optical bending deformation, it is characterized in that: the housing of inner prop body and interior cylindrical external body, on the surface of inner prop body, distribute a plurality of grooves along the longitudinal, on the inside surface of the housing of interior cylindrical external body, longitudinally also be distributed with a plurality of grooves, and the groove on the inside surface of the groove on the interior cylindrical surface and the housing of interior cylindrical external body is staggered corresponding, on the interior cylindrical surface, laterally be wound with signal optical fibre, signal optical fibre is clamped between the ditch ridge of groove on the shell inner surface of the ditch ridge of groove on the interior cylindrical surface and interior cylindrical external body, and the extension optical fiber of signal optical fibre connects test cell.
2. according to the described screw type fibre-optical sensing device based on fibre-optical bending deformation of claim 1, it is characterized in that: described interior cylindrical transversely is distributed with screw thread on the surface, and signal optical fibre is wrapped in the tooth paddy of screw thread.
3. according to the described screw type fibre-optical sensing device based on fibre-optical bending deformation of claim 1, it is characterized in that: the housing of inner prop body and interior cylindrical external body is two kinds of different materials.
4. according to the described screw type fibre-optical sensing device based on fibre-optical bending deformation of claim 1, it is characterized in that: the housing of inner prop body or interior cylindrical external body is to be made of magnetostriction materials or electrostriction material.
5. according to the described screw type fibre-optical sensing device based on fibre-optical bending deformation of claim 4, it is characterized in that: the inner prop body is to be made of crystal material.
6. according to the described screw type fibre-optical sensing device based on fibre-optical bending deformation of claim 5, it is characterized in that: the housing of interior cylindrical external body is to be made of isotropic quartz glass.
7. according to the described screw type fibre-optical sensing device based on fibre-optical bending deformation of claim 6, it is characterized in that: the inner prop body of crystal material and isotropic quartz glass are positioned in the vacuum cavity jointly.
8. according to the described screw type fibre-optical sensing device based on fibre-optical bending deformation of claim 1, it is characterized in that: the inner prop body is a tubular body.
9. according to the described screw type fibre-optical sensing device based on fibre-optical bending deformation of claim 1, it is characterized in that: the inner prop body is cone-shaped, and the inner chamber of the housing of interior cylindrical external body also is cone-shaped.
10. according to any described screw type fibre-optical sensing device based on fibre-optical bending deformation of claim 1 to 9, it is characterized in that: an end of signal optical fibre is mounted with light reflecting device.
11. according to the described screw type fibre-optical sensing device based on fibre-optical bending deformation of claim 10, it is characterized in that: 1 mouthful of the other end of signal optical fibre and 1X2 shunt is connected 2 mouthfuls of light signal input/output ports that connect test cell respectively of 1X2 shunt.
12. according to the described screw type fibre-optical sensing device based on fibre-optical bending deformation of claim 10, it is characterized in that: the light reflecting device of settling at an end of signal optical fibre is the grating type optical fiber reflection device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101564465A CN102235884A (en) | 2010-04-27 | 2010-04-27 | Spiral optical fiber sensing device based on bending deformation of optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101564465A CN102235884A (en) | 2010-04-27 | 2010-04-27 | Spiral optical fiber sensing device based on bending deformation of optical fiber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102235884A true CN102235884A (en) | 2011-11-09 |
Family
ID=44886753
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101564465A Pending CN102235884A (en) | 2010-04-27 | 2010-04-27 | Spiral optical fiber sensing device based on bending deformation of optical fiber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102235884A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103852089A (en) * | 2014-03-29 | 2014-06-11 | 吉林大学 | Plastic optical fiber sensor with multi-tapered hole bent structure |
| CN104335019A (en) * | 2012-06-06 | 2015-02-04 | 东芝三菱电机产业系统株式会社 | Optical fiber thermal sensor |
| CN104180922B (en) * | 2014-08-21 | 2016-12-07 | 中国计量学院 | Electricity generator stator core temperature checking method based on Fibre Optical Sensor |
| CN106813766A (en) * | 2017-01-23 | 2017-06-09 | 中国科学院半导体研究所 | Sound magnetic is with the distributed optical fiber sensing system surveyed |
| CN108663145A (en) * | 2018-08-01 | 2018-10-16 | 桂林电子科技大学 | The quasi- profile fiber pressure sensor of sensitizing type |
| CN109506540A (en) * | 2018-09-30 | 2019-03-22 | 武汉船用机械有限责任公司 | The measuring device and measuring method of oil pipe elongation |
| CN109539969A (en) * | 2018-12-29 | 2019-03-29 | 江苏大学 | A kind of structure monitoring system and its method |
| CN110319862A (en) * | 2019-07-11 | 2019-10-11 | 南京法艾博光电科技有限公司 | A kind of helical structure device for distributing optical fiber sensing in civil engineering |
| CN111256869A (en) * | 2020-01-19 | 2020-06-09 | 哈尔滨工业大学 | Optical fiber sensor for road for testing temperature field along depth direction and arrangement method |
| CN111521126A (en) * | 2020-04-28 | 2020-08-11 | 兰州大学 | Fiber grating sensing monitoring method for three-dimensional reconstruction of submarine pipeline |
-
2010
- 2010-04-27 CN CN2010101564465A patent/CN102235884A/en active Pending
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104335019A (en) * | 2012-06-06 | 2015-02-04 | 东芝三菱电机产业系统株式会社 | Optical fiber thermal sensor |
| CN104335019B (en) * | 2012-06-06 | 2016-11-16 | 东芝三菱电机产业系统株式会社 | Fibre optic temperature sensor |
| US9810588B2 (en) | 2012-06-06 | 2017-11-07 | Toshiba Mitsubishi-Electric Industrial Systems Corporation | Optical fiber temperature sensor |
| CN103852089A (en) * | 2014-03-29 | 2014-06-11 | 吉林大学 | Plastic optical fiber sensor with multi-tapered hole bent structure |
| CN104180922B (en) * | 2014-08-21 | 2016-12-07 | 中国计量学院 | Electricity generator stator core temperature checking method based on Fibre Optical Sensor |
| CN106813766A (en) * | 2017-01-23 | 2017-06-09 | 中国科学院半导体研究所 | Sound magnetic is with the distributed optical fiber sensing system surveyed |
| CN106813766B (en) * | 2017-01-23 | 2019-09-24 | 中国科学院半导体研究所 | Sound magnetic is the same as the distributed optical fiber sensing system surveyed |
| CN108663145B (en) * | 2018-08-01 | 2024-05-28 | 桂林电子科技大学 | Sensitization type quasi-distribution optical fiber pressure sensor |
| CN108663145A (en) * | 2018-08-01 | 2018-10-16 | 桂林电子科技大学 | The quasi- profile fiber pressure sensor of sensitizing type |
| CN109506540A (en) * | 2018-09-30 | 2019-03-22 | 武汉船用机械有限责任公司 | The measuring device and measuring method of oil pipe elongation |
| CN109539969A (en) * | 2018-12-29 | 2019-03-29 | 江苏大学 | A kind of structure monitoring system and its method |
| CN110319862B (en) * | 2019-07-11 | 2021-03-30 | 南京法艾博光电科技有限公司 | A helical structure device for distributed optical fiber sensing among civil engineering |
| CN110319862A (en) * | 2019-07-11 | 2019-10-11 | 南京法艾博光电科技有限公司 | A kind of helical structure device for distributing optical fiber sensing in civil engineering |
| CN111256869A (en) * | 2020-01-19 | 2020-06-09 | 哈尔滨工业大学 | Optical fiber sensor for road for testing temperature field along depth direction and arrangement method |
| CN111521126A (en) * | 2020-04-28 | 2020-08-11 | 兰州大学 | Fiber grating sensing monitoring method for three-dimensional reconstruction of submarine pipeline |
| CN111521126B (en) * | 2020-04-28 | 2022-01-28 | 兰州大学 | Fiber grating sensing monitoring method for three-dimensional reconstruction of submarine pipeline |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102235884A (en) | Spiral optical fiber sensing device based on bending deformation of optical fiber | |
| CN101865665A (en) | Measurement device and method of optical fiber bending parameter | |
| CN107246931B (en) | Fiber bragg grating transverse stress strain sensor and detection method | |
| CN102455191A (en) | Optical fiber sensing device based on optical fiber bending deformation | |
| CA2871670C (en) | A method and device for pressure sensing | |
| US5481922A (en) | Elastic transducer designs incorporating finite length measurement paths | |
| CN101923057B (en) | BOTDR (Brillouin Optical Time-Domain Reflectometer) fiber optical corrosive sensor | |
| CN101900617A (en) | Optical fiber type non-invasive pipeline pressure sensor | |
| US20160341612A1 (en) | Sensing cable with enhanced sensitivity | |
| US20160025584A1 (en) | A sensing cable | |
| CN201955380U (en) | Novel high-voltage optical fiber sensing device | |
| CN108827189B (en) | Torsion sensor based on reflection type micro-nano fiber coupler | |
| CN201858525U (en) | Optical fiber type non-intrusive pipeline pressure sensing device | |
| CN201955379U (en) | Optical fiber type high voltage monitoring device | |
| Vijayan et al. | An optical fiber weighing sensor based on bending | |
| CN102374872A (en) | Optical fiber sensing device based on functional material | |
| CN201772967U (en) | Fiber stress sensing device based on corrugated pipe | |
| CN102565498A (en) | Optical fiber type high voltage monitoring device | |
| RU2552399C1 (en) | Distributed fiber optical high sensitivity temperature sensor | |
| CN102565495A (en) | Optical fiber type current sensing device | |
| RU91625U1 (en) | SENSOR FOR DETERMINING THE SIZE AND DIRECTION OF DEFORMATION OF A LONG PROJECT | |
| CN105823496A (en) | Linear optical fiber sensing device | |
| Li et al. | The study of enhancing temperature sensitivity for FBG temperature sensor | |
| CN216746413U (en) | Cascade structure vibration sensor based on LPG and FBG | |
| CN203929037U (en) | A kind of optical fiber micro-bending sensor based on twin-core fiber |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20111109 |