CN102928001A - Forest fire monitoring wireless sensing system based on fiber bragg grating sensing technology - Google Patents
Forest fire monitoring wireless sensing system based on fiber bragg grating sensing technology Download PDFInfo
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- CN102928001A CN102928001A CN2012103936245A CN201210393624A CN102928001A CN 102928001 A CN102928001 A CN 102928001A CN 2012103936245 A CN2012103936245 A CN 2012103936245A CN 201210393624 A CN201210393624 A CN 201210393624A CN 102928001 A CN102928001 A CN 102928001A
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Abstract
The invention relates to the technical field of the fiber bragg grating sensing technology and the forest fire prevention. The invention discloses a forest fire monitoring wireless sensing system based on the fiber bragg grating sensing technology. The technical scheme is as follows: the sensing system comprises a power supply system, a power supply, a single mode fiber, a fiber bragg grating, a photoelectric detection device, a demodulating device, a data processing module and a wireless communication module. The forest fire monitoring wireless sensing system is characterized in that a solar energy power supply system is adopted to electrify a light source, the light source and the fiber bragg grating as well as the fiber bragg grating and the photoelectric detection device are connected through the single mode fiber, an output end of the photoelectric detection device is connected with the demodulating device, and an output end of the demodulating device is connected with a data processing module and a wireless communication module. The forest fire monitoring wireless sensing system has the beneficial effects that the fiber bragg grating sensing technology is applied in the forest fire monitoring field, and open up a new field of the application of the fiber bragg grating sensor is opened, and moreover, a new method and a mean are provided for the safe and health monitoring in the complex and severe environment of forest.
Description
Technical field
The present invention relates to fiber grating sensing technology and forest fire protection technical field, particularly relate to a kind of wireless sensing system of the forest fire monitoring based on fiber grating sensing technology.
Background technology
Forest fire has the very characteristics such as difficulty of wide, destructive large, relief occurs, and occupies first of three the Nature disasters (fire, disease, insect pest) of destroying forest.At present forest fire monitoring means commonly used mainly contain in the world: artificial patrol, video monitoring, protect a forest aircraft and the patrol of infrared remote sensing fire alarm aircraft, satellite itinerant monitor system system, and based on the forest fire automatic early-warning system of various sensing networks.From present operating position, it is too many that artificial patrol consumes manpower, and cause easily and fail to report; It is too high that the use of aircraft of protecting a forest expends financial resources, is not long-term plan; Satellite imagery or mainly reflect the situations such as flame, smog by the image that long-distance video obtains is difficult to reflect directly environment, the meteorologic factor dynamic change situation such as temperature, humidity and atmospheric pressure; Also because observing effect is subjected to the restriction of terrain, coverage rate is little, and dead angle and blank are arranged simultaneously.The automatic early-warning system that sets up forest fire monitoring realizes that to forest fire aerial the monitoring with the ground omnibearing stereo is the developing direction of forest fire protection, finally realizes the intellectuality of forest fire protection, informationization.Radio sensing network then is core and the key of this automatic early-warning system.
At present about the research of the radio sensing network that is applied in forest fire monitoring system existing many reports at home and abroad, the sensor that forms radio sensing network is electric sensor mostly.The electric sensor price is low, technical maturity, but under the mal-conditions such as high temperature, high pressure, strong electromagnetic and chemical corrosion, can not use, and especially the surface-fire temperature reaches 400 ℃ when fire occurs, crown fire even reach 900 ℃, the sensing network of conflagration area all can be destroyed fall.And Fibre Optical Sensor is lightweight with it, easily the advantage of the uniqueness such as multiplexing, anti-electromagnetic interference (EMI) and resist chemical has been widely used in the numerous areas such as military affairs, civil construction, electric power, petrochemical complex, biomedicine, environmental monitoring.Wireless sensing system based on the forest fire monitoring of fiber grating sensing technology yet there are no report.
Wireless sensing system based on the forest fire monitoring of fiber grating sensing technology is not yet arranged at present.
Summary of the invention
Purpose of the present invention is intended to utilize fiber-optic grating sensor as the sensing primitive, the physical quantitys such as the temperature of forest, humidity, wind speed and direction, smokescope are measured, and the signal of measuring carried out analyzing and processing, by wireless transmitter module data transmission is arrived remote control center, consist of the wireless sensing system based on the forest fire monitoring of fiber grating sensing technology.
The present invention is a kind of wireless sensing system of the forest fire monitoring based on fiber grating sensing technology, utilizes fiber-optic grating sensor as sensing probe, adopts the wireless way for transmitting data signal.Result for retrieval shows still there is not the patent report of the wireless sensing system of consistent with it forest fire monitoring at present.
The invention discloses a kind of wireless sensing system of the forest fire monitoring based on fiber grating sensing technology, its technical scheme is as follows:
The wireless sensing system of this forest fire monitoring based on fiber grating sensing technology comprises electric power system, light source, single-mode fiber, fiber grating, photoelectric detection system, demodulating equipment, data processing module, wireless communication module.
Wireless sensing system based on the forest fire monitoring of fiber grating sensing technology is characterized in: adopt solar electric power supply system that light source is powered, respectively light source is linked to each other with photoelectric detection system with fiber grating, fiber grating with single-mode fiber, the output terminal of photoelectric detection system is connected with demodulating equipment, and the output terminal of demodulating equipment processes with data and wireless communication module is connected.
Described electric power system is solar powered, and sensor-based system is powered, and need not to erect a television antenna, on the spot power taking.
Described light source is tunable optical source or wideband light source, and its wave band should be able to cover the wave band of fiber grating.
Described fiber grating is to cause the optical device that spectrum or light intensity change by physical parameters such as temperature, strain, humidity, smokescopes, is bragg grating or long period fiber grating or inclined optical fiber grating etc.
Described fiber grating can require to carry out corresponding encapsulation according to different measurements, consists of the sensing probe of measuring multiple physical quantity.Also can in a system, adopt the connected mode of series connection or in parallel or string and series-parallel connection to consist of optical fiber optical grating array.
Described wireless communication module can also consist of sensing network by wireless network and other sensors, finishes exchanging information, and cooperates with each other, and finishes the functions such as data extraction, analysis, decision-making.
Described demodulating equipment can be the demodulating equipment of wavelength or beat frequency or light intensity signal, can take different demodulation means according to different transducing signals.
The wireless sensing system of the forest fire monitoring based on fiber grating sensing technology of the present invention, fiber grating sensing technology is applied to the forest fire monitoring field, when keeping the characteristics such as fiber-optic grating sensor is highly sensitive, anti-interference, the combining wireless communication technology can be produced modularization, optical fiber optical grating wireless sensor-based system cheaply.Open up a new field for the application of fiber-optic grating sensor, make it on the basis that keeps original good characteristic the extensive sensing network system of composition that can be more flexible.For safety, health monitoring under complexity, the rugged environment in the forest provide new ways and means.
Description of drawings
Fig. 1 is the wireless sensing system structural drawing of the forest fire monitoring based on fiber grating sensing technology of the present invention.
Embodiment
The present invention is further described below in conjunction with drawings and Examples.
The wireless sensing system of this forest fire monitoring based on fiber grating sensing technology comprises: electric power system, and light source, fiber grating, photoelectric detection system, demodulating equipment, data processing module, wireless communication module connects and uses single-mode fiber.Be characterized in: respectively light source is linked to each other with photoelectric detection system with fiber grating, fiber grating with single-mode fiber.The output terminal of photoelectric detection system is connected with demodulating equipment, and the output terminal of demodulating equipment processes with data and wireless communication module is connected.
Electric power system can adopt solar electric power supply system.
Light source can be wideband light source or narrow-band tunable light source.
Fiber grating can be that bragg grating or long period fiber grating or inclined optical fiber grating etc. can cause the optical device that spectrum or light intensity change by physical parameters such as temperature, strain, humidity, smokescopes.
Fiber grating can require to carry out corresponding encapsulation according to different measurements, consists of the sensing probe of measuring multiple physical quantity.Also can in a system, adopt the connected mode of series connection or in parallel or string and series-parallel connection to consist of optical fiber optical grating array.
Photoelectric detection system adopts the PIN photodiode of InGaAs material.
Demodulating equipment can be the demodulating equipment of wavelength or beat frequency or light intensity signal, can take different demodulation means according to the different transducing signal of fiber grating.Data are sent to data to be processed and wireless communication module.
Wireless communication module can adopt the 3G communication modes, can also consist of sensing network by wireless network and other sensors, finishes exchanging information, and cooperates with each other, and finishes the functions such as data extraction, analysis, decision-making.
Embodiment:
Electric power system adopts solar cell that light source is powered.The service band of light source is 1525-1575nm.Fiber grating adopts long period fiber grating, and centre wavelength is 1530nm, and bandwidth is 5nm, and the central wavelength reflectivity is 95%.Photoelectric detection system adopts the PIN photodiode of InGaAs material, and its responsing center's wavelength is 1300nm, and responsive bandwidth is 600nm.Demodulating equipment adopts turnable fiber filter or based on the linear demodulation device of light intensity, can detect the wavelength that draws fiber grating.Single-mode fiber adopts the single-mode fiber of 1550nm wave band.Wireless communication module adopts the 3G wireless signal transmitter, and data message is sent to remote monitoring center by 3G network.
When practical application, with single-mode fiber light source is linked to each other with fiber grating, fiber grating and photoelectric detection system are corresponding.
Claims (9)
1. wireless sensing system based on the forest fire monitoring of fiber grating sensing technology, it comprises: electric power system, light source, fiber grating, photoelectric detection system, demodulating equipment, data processing module, wireless communication module connects and uses single-mode fiber, it is characterized in that: respectively light source is linked to each other with photoelectric detection system with fiber grating, fiber grating with single-mode fiber; The output terminal of photoelectric detection system is connected with demodulating equipment, and the output terminal of demodulating equipment processes with data and wireless communication module is connected.
2. the wireless sensing system of the forest fire monitoring based on fiber grating sensing technology according to claim 1, it is characterized in that: electric power system is solar powered.
3. the wireless sensing system of the forest fire monitoring based on fiber grating sensing technology according to claim 1, it is characterized in that: light source is wideband light source or tunable optical source, and its wave band can cover the wave band of fiber grating.
4. the wireless sensing system of the forest fire monitoring based on fiber grating sensing technology according to claim 1, it is characterized in that: sensor is the fiber grating of bragg grating, long period fiber grating or other type.
5. the wireless sensing system of the forest fire monitoring based on fiber grating sensing technology according to claim 1, it is characterized in that: fiber grating can require to encapsulate according to different measurements, measure the various physical quantitys in the forest fire monitoring, such as temperature, humidity, smokescope etc.
6. the wireless sensing system of the forest fire monitoring based on fiber grating sensing technology according to claim 1, it is characterized in that: fiber grating can take the connected mode of a plurality of serial or parallel connections or series-parallel connection to consist of optical fibre optical grating sensing array.
7. the wireless sensing system of the forest fire monitoring based on fiber grating sensing technology according to claim 1, it is characterized in that: photoelectric detection system adopts the PIN photodiode of InGaAs material.
8. the wireless sensing system of the forest fire monitoring based on fiber grating sensing technology according to claim 1, it is characterized in that: demodulating equipment is the demodulating equipment of wavelength or beat frequency or light intensity signal, can take different demodulation means according to the different transducing signal of fiber grating.
9. the wireless sensing system of the forest fire monitoring based on fiber grating sensing technology according to claim 1, it is characterized in that: wireless communication module adopts the 3G communication modes, can also consist of sensing network by wireless network and other sensors, finish and exchange information, cooperate with each other, finish the functions such as data extraction, analysis, decision-making.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109612573A (en) * | 2018-12-06 | 2019-04-12 | 南京林业大学 | A kind of crown fire and ground fire detection method based on noise spectrum analysis |
| CN110207735A (en) * | 2019-05-05 | 2019-09-06 | 浙江省建筑科学设计研究院有限公司 | Wireless hand-held fiber Bragg grating (FBG) demodulator |
| CN110707798A (en) * | 2019-10-16 | 2020-01-17 | 安徽中科智泰光电测控科技有限公司 | Low-power consumption FBG system device based on solar power supply and wireless transmission |
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Application publication date: 20130213 |