CN102042890A - Bent optical fiber sensing device with reflecting mirrors - Google Patents
Bent optical fiber sensing device with reflecting mirrors Download PDFInfo
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- CN102042890A CN102042890A CN2009100242550A CN200910024255A CN102042890A CN 102042890 A CN102042890 A CN 102042890A CN 2009100242550 A CN2009100242550 A CN 2009100242550A CN 200910024255 A CN200910024255 A CN 200910024255A CN 102042890 A CN102042890 A CN 102042890A
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Abstract
The invention discloses a bent optical fiber sensing device with reflecting mirrors, which comprises a light source, an optical splitter, bent optical fiber sensors and an optical power meter and is characterized in that the optical splitter is a model 2*N, wherein the 2 ends of the optical splitter are respectively connected with the light source and the optical power meter, the N ends of the optical splitter are connected with at least two or more optical fibers, each optical fiber is provided with at least one bent optical sensor, and the tail end of each optical fiber is respectively provided with a reflecting mirror to form one optical fiber sensing device. When any one of bent optical fiber sensors on the optical fiber sensing device responds, the bent optical fiber sensor cause the attenuation of the power of an optical signal transmitted inside the corresponding optical fiber, the power of the optical signal reflected back by the corresponding reflecting mirror decreases, and the optical power meter shows the change, therefore the monitoring of a force value with larger range is completed. The bent optical fiber sensing device with the reflecting mirrors has the advantages of simple structure, strong ambient interference resistance and low operation and using cost, and is practical and suitable for popularization and application.
Description
Technical field
The present invention relates to a kind of curved fiber sensing device with catoptron, 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 curved fiber sensing device with catoptron, 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 curved fiber sensing device that the present invention discloses with catoptron, light source, optical branching device, curved fiber sensor, light power meter, it is characterized in that optical branching device is 2 * N type, wherein " 2 " of optical branching device end connects light source and light power meter respectively, the optical fiber of " N " termination more than at least two and two, have a curved fiber sensor on the every optical fiber at least, and all be mounted with catoptron, form a fibre-optical sensing device at the end of every optical fiber.When any the curved fiber sensor on this fibre-optical sensing device has response, its power to the light signal that transmits in the optical fiber causes decay, the optical signal power that mirror reflects is returned descends, and can respond on light power meter, and 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-light source, 2-optical branching device, 3-optical fiber, 4-curved fiber sensor, 5-light reflection mirror
The 8-light power meter.
Embodiment
Fig. 1 is a synoptic diagram according to an embodiment of the invention.The light signal that light source 1 sends, enter into optical fiber 3 and curved fiber sensor 4 by optical branching device 2, end at every optical fiber all is mounted with catoptron, light signal is back in the light power meter 8 through the former again road of catoptron, when any one curved fiber sensor 4 is subjected to force-responsive to external world, light signal by this curved fiber sensor 4 also has decay, detects the variation of light signal at light power meter 8, thereby reaches the purpose of 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. curved fiber sensing device with catoptron, comprise light source, optical branching device, curved fiber sensor and light power meter, it is characterized in that, optical branching device is 2 * N type, wherein " 2 " of optical branching device end connects light source and light power meter respectively, the optical fiber of " N " termination more than at least two and two has a curved fiber sensor at least on the every optical fiber, and all is mounted with catoptron at the end of every optical fiber.
2. a kind of curved fiber sensing device with catoptron according to claim 1 is characterized in that described curved fiber sensor is an optical fiber macrobending loss sensor.
3. a kind of curved fiber sensing device with catoptron 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 |
|---|---|---|---|
| CN2009100242550A CN102042890A (en) | 2009-10-12 | 2009-10-12 | Bent optical fiber sensing device with reflecting mirrors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100242550A CN102042890A (en) | 2009-10-12 | 2009-10-12 | Bent optical fiber sensing device with reflecting mirrors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102042890A true CN102042890A (en) | 2011-05-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100242550A Pending CN102042890A (en) | 2009-10-12 | 2009-10-12 | Bent optical fiber sensing device with reflecting mirrors |
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| CN (1) | CN102042890A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109580984A (en) * | 2019-01-14 | 2019-04-05 | 浙江工业大学 | Air velocity transducer based on long-period fiber grating |
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2009
- 2009-10-12 CN CN2009100242550A patent/CN102042890A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109580984A (en) * | 2019-01-14 | 2019-04-05 | 浙江工业大学 | Air velocity transducer based on long-period fiber grating |
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Application publication date: 20110504 |