CN103134613A - Sensing device based on fluorescence optical fibers - Google Patents
Sensing device based on fluorescence optical fibers Download PDFInfo
- Publication number
- CN103134613A CN103134613A CN201110399817.7A CN201110399817A CN103134613A CN 103134613 A CN103134613 A CN 103134613A CN 201110399817 A CN201110399817 A CN 201110399817A CN 103134613 A CN103134613 A CN 103134613A
- Authority
- CN
- China
- Prior art keywords
- optical fiber
- fluorescence
- fluorescence optical
- photo
- module
- 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
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
The invention discloses a sensing device based on fluorescence optical fibers. The sensing device based on the fluorescence optical fibers comprises a fluorescence optical fiber, a light source module, a light sensor module and a control processing module. The light source module is connected with one end of the port 2 of a 1*2 optical coupler through optical fibers, the other end of the port 2 of the 1*2 optical coupler is connected with the light sensor module through optical fibers, an optical filter is arranged between the 1*2 optical coupler and the light sensor module, the port 1 end of the 1*2 optical coupler is connected with one end of the fluorescence optical fiber, and the control processing module is connected with the light source module and the light sensor module respectively. The fluorescence optical fiber comprises a fiber core and a wrapping layer, and the other end of the fluorescence optical fiber is provided with a reflected light eliminating device. Incident light waves and fluorescent light waves with sensing information can be transmitted for a long distance in the fiber core so as to obtain the fluorescent light waves at the end portion of the fluorescence optical fiber through optical detection devices and demodulate the variation of physical quantity to be measured, and the purpose of distributed or quasi-distributed monitoring and sensing is reached.
Description
Technical field
The present invention relates to a kind of fibre-optical sensing device, particularly relate to a kind of sensing device based on fluorescence optical fiber.
Background technology
Existing fluorescence optical fiber temperature sensing device is only spot measurement, can't accomplish distributed or quasi-distributed measurement, main cause is when after the fibre core of fluorescence optical fiber is doped with the active fluoro material, this fluorescent material absorbs larger to the light wave that transmits in fibre core, no matter causing is incident light wave or shorter with the distance of the fluorescence light wave transmissions of temperature signal, so can only be used for spot measurement.Limited the fluorescence optical fiber sensing device promoting the use of aspect quasi-distributed or distributed monitoring.
Summary of the invention
The object of the invention is to overcome above-mentioned deficiency of the prior art, a kind of sensing device based on fluorescence optical fiber is provided.The activity doping of being somebody's turn to do the fluorescence optical fiber that uses in the sensing device based on fluorescence optical fiber is positioned at covering, and adulterate at the fibre core non-activity, so on the one hand can with incident light wave and with the fluorescence light wave of heat transfer agent in the fibre core long-distance transmissions, so that obtain this fluorescence light wave in the end of this fluorescence optical fiber by light detection device and demodulate the variation of measured physical quantity, reach the purpose of distributed or quasi-distributed monitoring sensing, that the sensing device of this fluorescence optical fiber has is easy to use, cost is low, has application prospect preferably.
For achieving the above object, the technical solution used in the present invention is:
The present invention compared with prior art has the following advantages:
1, this fluorescence optical fiber, its activated dopants is positioned at covering, and in fibre core the non-activity adulterant, so on the one hand can with incident light wave and with the fluorescence light wave of heat transfer agent in the fibre core long-distance transmissions, simultaneously, the fluorescence light wave that the incident light that is coupled in covering is inspired is coupled into fibre core as much as possible again, thereby reaches the purpose of distributed or quasi-distributed monitoring sensing.
2, described covering, be not more than the zone of the 5 microns active fluoro material that do not adulterate apart from fibre core and covering interphase, only under the conditions such as crooked, little curved or fibre strain, incident light just has partial coupling and enters in covering, can be used for the monitoring of bending, stress and so on physical quantities, thereby reach the purpose of distributed or quasi-distributed monitoring sensing.
3, the optical filter by settling between 1 * 2 photo-coupler and photo-detector module, but the light signal that this optical filter filtering optical module sends, make the photodetection module only obtain the fluorescence information that fluorescence optical fiber sends, and the identical or close Rayleigh scattering light signal of wavelength of the light signal that sends with optical module that is reflected back from fluorescence optical fiber can not enter the photodetection module by optical filter.
4, control processing module control light source module and send pulsed optical signals, and obtain not in the same time fluorescence information by the photodetection module, change when the sunset glow time that has fluorescence signal or fluorescence signal, can calculate the variation of measured physical quantity, and calculate the position of measured physical quantity according to the relation of fluorescence signal and time, thereby reach the purpose of distributed monitoring.
In sum, that the sensing device of fluorescence optical fiber of the present invention has is simple in structure, cost is low, purposes is wide, can realize the purpose of distributed or quasi-distributed monitoring sensing, has market outlook preferably.Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the present invention 1.
Fig. 2 is the structural representation in the cross section of fluorescence optical fiber in Fig. 1.
Fig. 3 is the cross section structure schematic diagram of the fluorescence optical fiber of the embodiment of the present invention 2.
Description of reference numerals:
The 1-fibre core; The 2-covering; The 3-surrounding layer;
The unadulterated cladding regions of 4-; 5-controls processing module; The 6-fluorescence optical fiber;
7-reflected light cancellation element; The 8-display module; The 9-light source module;
10-photodetection module; 11-1 * 2 photo-couplers; The 12-optical filter.
Embodiment
Embodiment 1
a kind of sensing device based on fluorescence optical fiber as depicted in figs. 1 and 2, comprise fluorescence optical fiber 6, light source module 9, photo-detector module 10 and control processing module 5, an end in by optical fiber and 1 * 2 photo-coupler 11 2 mouthfuls of described light source module 1 is connected, the other end in 2 mouthfuls of 1 * 2 photo-coupler 11 is connected by optical fiber with photo-detector module 10, be mounted with optical filter 12 between 1 * 2 photo-coupler 11 and photo-detector module 10, 1 mouthful of end of 1 * 2 photo-coupler 11 is connected with an end of fluorescence optical fiber 6, described control processing module 5 is connected with the photo-detector module with light source module 9 respectively and is connected, described fluorescence optical fiber 6 comprises fibre core 1 and covering 2, and described fibre core 1 is the non-activity adulterant, and in described covering 2, doped with the active fluoro material, the refractive index of described fibre core 1 is greater than the refractive index of described covering 2.
This fluorescence optical fiber 6, its activated dopants is positioned at covering 2, and in fibre core 1 the non-activity adulterant, so on the one hand can with incident light wave and with the fluorescence light wave of heat transfer agent in fibre core 1 long-distance transmissions, simultaneously, the fluorescence light wave that the incident lights that are coupled in covering 2 are inspired is as much as possible is coupled into fibre core 1 again, thereby reaches the purpose of distributed or quasi-distributed monitoring sensing.
Preferably, control processing module 5 and be connected with display module 8.
concrete process is: control processing module 5 control light source modules 9 and send the light signal of pulse, this light signal enters the interior transmission of fluorescence optical fiber 6 by 1 * 2 photo-coupler 11, the major part of light signal is positioned at fibre core 1 transmission and produces backward Rayleigh scattering light signal, and this backward Rayleigh scattering light signal enters in optical filter 12 and by optical filter 12 filterings by 1 * 2 photo-coupler 11, a small amount of light signal is in the interior transmission of covering 2 of fluorescence optical fiber 6 and inspire fluorescence signal, the part of this fluorescence signal is coupled into again in fibre core 1 and transmission backward, enter in photodetection module 10 by 1 * 2 photo-coupler 11 and optical filter 12, photodetection module 10 passes to the fluorescence signal that obtains and controls processing module 5, control processing module 5 according to the variation of the sunset glow time generation of fluorescence signal, can calculate the variation of measured physical quantity, and calculate the position of measured physical quantity according to the relation of fluorescence signal and time, thereby reach the purpose of distributed monitoring, and this result is transferred to display module 8.Preferably, the superposition calculation of controlling a plurality of fluorescence signals that are reflected back that processing module 5 can be by there being a plurality of optical pulse generations goes out variation and the position of measured physical quantity.
Preferably, but described optical filter 12 is narrow-band optical filters of filtering light source module output optical signal.
Preferably, be mounted with reflected light cancellation element 7 at the other end of described fluorescence optical fiber 6, to eliminate the light signal that disturbs.Further, described reflected light cancellation element 7 is that the other end with fluorescence optical fiber is immersed in the container that matching fluid is housed.Or further, described reflected light cancellation element 7 is that the other end with fluorescence optical fiber 6 is wound up as diameter less than the circle of 20 millimeters or a circle is above and stationary device.
Preferably, the refractive index of the covering 2 of described fluorescence optical fiber 6 be radially, by near fibre core 1 to reducing gradually away from fibre core 1 direction, the maximal value greater than covering 2 refractive indexes of the refractive index of described fibre core 1.
Preferably, described fluorescent material is organic dyestuff.As rhodamine and derivant class thereof, the organic molecule fluorescent materials such as coumarin derivatives.
Preferably, described fluorescent material is the material that contains neodymium ion, erbium ion, ytterbium ion, praseodymium ion, thulium ion, europium ion or holmium ion.
Preferably, also have one deck surrounding layer 3 outside the covering 2 of described fluorescence optical fiber 6, described covering 2 refractive indexes are greater than the refractive index of surrounding layer 3.
As shown in Figure 3, in the present embodiment, as different from Example 1 in described covering 2, fibre core 1 and covering 2 interphases are to the unadulterated cladding regions 4 that is not more than the active fluoro material that do not adulterate in the zone of 5 microns apart from fibre core 1 and covering 2 interphase radial distances.Like this, only be under the conditions such as bending, little curved or distortion at this fluorescence optical fiber 6, light source module 9 is that send, enter into incident lights in fluorescence optical fiber 6 just has partial coupling and enters covering 2 and inspire fluorescence, controlled processing unit 5 can extrapolate according to the mistiming that light source module 9 sends the time of light signal and the fluorescence signal that photodetection module 10 receives the position that measured physical quantity changes, and go out according to the intensity of fluorescence signal or the Time Calculation of twilight sunset continuity the size that measured physical quantity changes, thereby realize the purpose of distributed monitoring.In the present embodiment, the structure of remainder, annexation and principle of work are all identical with embodiment 1.
The above; it is only preferred embodiment of the present invention; be not that the present invention is imposed any restrictions, every according to the technology of the present invention essence to any simple modification, change and equivalent structure transformation that above embodiment does, all still belong in the protection domain of technical solution of the present invention.
Claims (4)
1. sensing device based on fluorescence optical fiber, it is characterized in that: comprise fluorescence optical fiber (6), light source module (9), photo-detector module (10) and control processing module (5), an end in by optical fiber and 1 * 2 photo-coupler (11) 2 mouthfuls of described light source module (1) is connected, the other end in 2 mouthfuls of 1 * 2 photo-coupler (11) is connected by optical fiber with photo-detector module (10), be mounted with optical filter (12) between 1 * 2 photo-coupler (11) and photo-detector module (10), 1 mouthful of end of 1 * 2 photo-coupler (11) is connected with an end of fluorescence optical fiber (6), described control processing module (5) is connected 10 with light source module (9) with the photo-detector module respectively) be connected, described fluorescence optical fiber (6) comprises the fibre core (1) of non-activity adulterant and interior doped with active fluoro material and the refractive index covering (2) less than fibre core (1) refractive index, described optical filter (12) but be the narrow-band optical filter of filtering light source module output optical signal, the other end of described fluorescence optical fiber (6) is mounted with reflected light cancellation element (7).
2. a kind of sensing device based on fluorescence optical fiber according to claim 1 is characterized in that: described reflected light cancellation element (7) is that the other end with fluorescence optical fiber (6) is immersed in the container that is equipped with in matching fluid.
3. a kind of sensing device based on fluorescence optical fiber according to claim 1 is characterized in that: described reflected light cancellation element (7) is that the other end with fluorescence optical fiber (6) is wound up as diameter less than the circle of 20 millimeters or a circle is above and stationary device.
4. a kind of sensing device based on fluorescence optical fiber according to claim 1, is characterized in that: also have one deck refractive index outside the covering (2) of described fluorescence optical fiber (6) less than the surrounding layer (3) of covering (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110399817.7A CN103134613A (en) | 2011-12-05 | 2011-12-05 | Sensing device based on fluorescence optical fibers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110399817.7A CN103134613A (en) | 2011-12-05 | 2011-12-05 | Sensing device based on fluorescence optical fibers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103134613A true CN103134613A (en) | 2013-06-05 |
Family
ID=48494741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110399817.7A Pending CN103134613A (en) | 2011-12-05 | 2011-12-05 | Sensing device based on fluorescence optical fibers |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103134613A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103698047A (en) * | 2013-12-02 | 2014-04-02 | 国网河南省电力公司电力科学院研究院 | High-voltage electrical equipment non-contact fluorescence temperature measurement system |
| CN104897303A (en) * | 2015-06-30 | 2015-09-09 | 广东美的厨房电器制造有限公司 | Fiber optic temperature sensor, microwave heating device and heating method |
| CN105509926A (en) * | 2016-01-29 | 2016-04-20 | 珠海欧森斯科技有限公司 | Light path coupling device and fluorescence temperature sensing optical system |
-
2011
- 2011-12-05 CN CN201110399817.7A patent/CN103134613A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103698047A (en) * | 2013-12-02 | 2014-04-02 | 国网河南省电力公司电力科学院研究院 | High-voltage electrical equipment non-contact fluorescence temperature measurement system |
| CN104897303A (en) * | 2015-06-30 | 2015-09-09 | 广东美的厨房电器制造有限公司 | Fiber optic temperature sensor, microwave heating device and heating method |
| CN104897303B (en) * | 2015-06-30 | 2018-07-13 | 广东美的厨房电器制造有限公司 | Fibre optic temperature sensor, microwave heating equipment and its heating means |
| CN105509926A (en) * | 2016-01-29 | 2016-04-20 | 珠海欧森斯科技有限公司 | Light path coupling device and fluorescence temperature sensing optical system |
| CN105509926B (en) * | 2016-01-29 | 2018-06-08 | 珠海欧森斯科技有限公司 | Light path coupling device and fluorescence temperature sensing optical system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207335782U (en) | A kind of high stability all -fiber magnetic field and temperature two parameter measurement sensing head | |
| CN102261966B (en) | Fluorescent optical fiber temperature measurement optical system | |
| CN102980681B (en) | A kind of distributed strain based on Brillouin scattering and optical fiber temperature sensor | |
| AU2013100784A4 (en) | An optical refractive index measuring system based on speckel correlation | |
| CN103940455B (en) | A kind of all -fiber high-precision sensor and its application based on optical fiber multiple-mode interfence | |
| CN102226725B (en) | Inner-wall waveguide long-time cycle fiber grating sensor | |
| CN108844919B (en) | Cladding reflection type inclined fiber grating refractive index sensor and manufacturing and measuring methods thereof | |
| CN203587177U (en) | Optical fiber liquid level sensor | |
| CN103123405A (en) | Fluorescent optical fiber with graded refractive index cladding | |
| CN103940456A (en) | Interference reflective probe type optical microsensor and manufacturing method thereof | |
| CN103134613A (en) | Sensing device based on fluorescence optical fibers | |
| CN204177736U (en) | The trace gas detection device in chamber is swung based on two-way light decay | |
| CN205300800U (en) | Fluorescence optical fiber temperature sensing demodulalation system | |
| CN202453113U (en) | Sensor for measuring temperature and salinity of seawater based on fibre Bragg grating (FBG) | |
| CN103134528A (en) | Novel fluorescent optical fiber sensing device | |
| CN207379920U (en) | A kind of light fibre humidity transducer based on zinc oxide nano rod | |
| CN201444039U (en) | Micro fiber grating displacement sensor | |
| CN103134533B (en) | Based on twin-channel distribution type optical fiber sensing equipment and its operation method | |
| CN203672333U (en) | Curvature sensor based on waist-enlarged welding fiber grating | |
| CN203785642U (en) | All-fiber bending sensor based on peanut-shaped structure | |
| CN103148877A (en) | Novel fluorescent fiber grating sensing device | |
| CN204575172U (en) | Based on the liquid level sensor of optical fiber | |
| CN103162866A (en) | Distributed type sensing device based on double-core double-wrapping layer optical fiber | |
| CN204389060U (en) | Transformer optical fiber grating temperature-measuring system | |
| CN102818657B (en) | Long-distance distributed Raman temperature sensor based on erbium-doped optical fiber amplifier (EDFA) amplification technology |
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: 20130605 |