CN102042889A - Distributed bent fiber sensing device - Google Patents
Distributed bent fiber sensing device Download PDFInfo
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- CN102042889A CN102042889A CN2009100242512A CN200910024251A CN102042889A CN 102042889 A CN102042889 A CN 102042889A CN 2009100242512 A CN2009100242512 A CN 2009100242512A CN 200910024251 A CN200910024251 A CN 200910024251A CN 102042889 A CN102042889 A CN 102042889A
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- fiber sensing
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Abstract
The invention discloses a distributed bent fiber sensing device which comprises an optical time domain refectometer, an optical splitter and bent fiber sensors. The distributed bent fiber sensing device is characterized in that the optical time domain refectometer is connected with the optical splitter, the optical splitter is connected with at least two or more than two optical fibers, and each optical fiber is provided with at least one bent fiber sensor to form an optical fiber sensing device. When any one of optical sensing elements on the optical fiber sensing device gives a response related to time, position can be converted and reflected from the optical time domain refectometer so as to complete the monitoring of force values in a larger range. The distributed bent fiber sensing device has the advantages of simple and practical structure, strong environmental disturbance resistance and low operation and use cost and is suitable for promotion and application.
Description
Technical field
The present invention relates to a kind of distributed curved fiber sensing device, the sensor of stressing conditions is in a big way monitored in a kind of loss that utilizes multifiber of saying so more specifically.
Background technology
It is enough for existing Fibre Optical Sensor kind, comprise fiber-optic grating sensor, optical fibre interferometric sensor, polytypes such as optical fiber micro-bending sensor, be characterized in the sensing sensitivity height, the equipment complexity, use, the operating cost height, make its application be subjected to very big restriction, particularly its higher sensitivity can respond the change of various environmental baselines in the use, as optical fibre interferometric sensor, its sensitivity is very high, but after being applied under the physical condition, find temperature, air pressure, environmental factors such as vibration are all influential to it, have to take multiple measure to prevent and reject the influence of these factors, make instrument and equipment be tending towards complicated, the operation use cost improves; On the other hand, some places do not need especially accurate equipment in the actual life, need understand under the situations such as power value whether stress reach setting as us, and the said equipment just seems and wasted one's talent on a petty job.In addition, if the said equipment is when wanting to monitor in a big way stressing conditions, and the complexity of system significantly improves, and practical application is very difficult.
Summary of the invention
The object of the present invention is to provide a kind of distributed curved fiber sensing device, this kind Fibre Optical Sensor had both had lower foundation and operating cost, can reduce Effect of Environmental again.
For realizing purpose of the present invention, a kind of distributed curved fiber sensing device that the present invention discloses, optical time domain reflectometer, optical branching device, curved fiber sensor, it is characterized in that, optical time domain reflectometer connects optical branching device, shunt is connected to few optical fiber more than two and two, has a curved fiber sensor on the every optical fiber at least, forms a fibre-optical sensing device.When any the optical sensor spare on this fibre-optical sensing device has response, and should respond and time correlation, thereby can converse the position, and reflect on the optical time domain reflectometer, power is worth monitoring thereby finish in a big way.
Should be appreciated that the general introduction of front and following detailed description all are exemplary, rather than limitation of the present invention.
Description of drawings:
Fig. 1 is a synoptic diagram according to an embodiment of the invention.
Among the figure:
The 1-optical time domain reflectometer, 2-optical branching device, 3-optical fiber, 4-curved fiber sensor.
Embodiment
Fig. 1 is a synoptic diagram according to an embodiment of the invention.The light signal that optical time domain reflectometer 1 sends, enter into optical fiber 3 and curved fiber sensor 4 by optical branching device 2, there is rear orientation light to enter into optical time domain reflectometer 1 then by optical fiber and optical branching device 2, when any one curved fiber sensor 4 is subjected to force-responsive to external world, back scattering light signal by this curved fiber sensor 4 also changes to some extent, detect the variation of light signal at optical time domain reflectometer 1, and by with the correlativity of time, draw the position of this curved fiber sensor 4, thereby reach the purpose of distributed monitoring.
Can find out that from above-mentioned introduction the present invention is a kind of system of stressing conditions on a large scale that monitors, it is simple and practical, the temperature of surrounding environment, air pressure, vibration etc. do not have influence substantially to it, anti-environmental interference ability is strong, and operation and use cost are low, is suitable for promoting and using.
Certainly, the present invention is not limited to the embodiment that the front is introduced, and we can replace whole device with another kind of equivalent arrangements, and do not exceed scope of the present invention.
Claims (3)
1. distributed curved fiber sensing device, optical time domain reflectometer, optical branching device, curved fiber sensor, it is characterized in that, optical time domain reflectometer connects optical branching device, shunt is connected to few optical fiber more than two and two, have a curved fiber sensor on the every optical fiber at least, form a fibre-optical sensing device.
2. a kind of distributed curved fiber sensing device according to claim 1 is characterized in that described curved fiber sensor is an optical fiber macrobending loss sensor.
3. a kind of distributed curved fiber sensing device according to claim 1 is characterized in that described curved fiber sensor is essentially identical curved fiber sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100242512A CN102042889A (en) | 2009-10-12 | 2009-10-12 | Distributed bent fiber sensing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100242512A CN102042889A (en) | 2009-10-12 | 2009-10-12 | Distributed bent fiber sensing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102042889A true CN102042889A (en) | 2011-05-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100242512A Pending CN102042889A (en) | 2009-10-12 | 2009-10-12 | Distributed bent fiber sensing device |
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| CN (1) | CN102042889A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103983385A (en) * | 2014-05-07 | 2014-08-13 | 王东方 | Ellipsoidal optical fiber pressure sensor and optical fiber fault pressure point detection method |
-
2009
- 2009-10-12 CN CN2009100242512A patent/CN102042889A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103983385A (en) * | 2014-05-07 | 2014-08-13 | 王东方 | Ellipsoidal optical fiber pressure sensor and optical fiber fault pressure point detection method |
| CN103983385B (en) * | 2014-05-07 | 2016-05-18 | 王东方 | A kind of method of elliposoidal fibre optic compression sensor and detection fiber fault pressure spot |
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Application publication date: 20110504 |