CN102221452A - Real-time monitoring device for online writing weak optical fiber Bragg grating and application method thereof - Google Patents
Real-time monitoring device for online writing weak optical fiber Bragg grating and application method thereof Download PDFInfo
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- CN102221452A CN102221452A CN 201110151267 CN201110151267A CN102221452A CN 102221452 A CN102221452 A CN 102221452A CN 201110151267 CN201110151267 CN 201110151267 CN 201110151267 A CN201110151267 A CN 201110151267A CN 102221452 A CN102221452 A CN 102221452A
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Abstract
The invention provides a real-time monitoring device for online writing weak optical fiber Bragg grating and an application method thereof. The real-time monitoring device comprises an input optical fiber, a stator, a rotor, shift levers, a shift cylinder, an output optical fiber, a V-shaped slot quick connector, a motor, a take-up reel, a slideway, a light source, a spectrometer and a Y-shaped splitter, wherein the stator is supported on the slideway; one end of the stator is connected with the input optical fiber; the rotor is connected with the output optical fiber; the stator and the rotor can transmit light by a noncontact coupling way; the two shift levers are symmetrically arranged on the rotor up and down; two strip-shaped slots are symmetrically arranged on the shift cylinder up and down; the shift levers can pass in and out of the strip-shaped slots of the shift cylinder; the shift cylinder is fixed on the take-up reel that is fixed on a motor shaft; the V-shaped slot quick connector is fixed at the edge of the take-up reel; the output optical fiber passes through the strip-shaped slots of the shift cylinder, is butt-jointed and positioned with an optical fiber, on the take-up reel, in the V-shaped slot quick connector and then is clamped; one end of the Y-shaped splitter is connected with the light source and the spectrometer respectively; and the other end of the Y-shaped splitter is connected with the input optical fiber 1. The device is used for online monitoring of a write-in state of the weak optical fiber Bragg grating.
Description
Technical field
The present invention relates to online real-time monitoring device and the application process thereof of writing the fine grating of the low light level.Be mainly used in the situation that the writes real time on-line monitoring of optical fiber low light level grid in pulling process, belong to optical fiber and connect and sensor technical field.
Technical background
The fine grating of the low light level can be used as wave filter, is used to filter the noise of amplifying type self-emission optical amplifier before signal is processed, is better than the F-P wave filter aspect the signal to noise ratio (S/N ratio) of output signal improving.This wave filter does not almost have intersymbol interference, unlike the tail that a long decline is arranged, has avoided the generation of error detector from the pulse of F-P transmission-type wave filter yet.
Fine another important application of grating of the low light level is aspect the health monitoring of compound substance.Modern designs is lighter towards service property (quality), intensity is higher, more intelligent material direction develops.Compare with metal, compound substance costs such as carbon fiber are lower, and main cause is that the metal material parts often existed design, and frequent the detection.Therefore, use compound substance replacement metal material design parts are developing direction from now on, and for example 787 aircrafts of Boeing Co. use carbon fibre composite in a large number, greatly reduce flying weight, have saved fuel cost.But carbon fibre composite in use defectives such as crackle, layering can occur, and these defectives not only be difficult to be surveyed, and also is catastrophic to the safe flight of aircraft.In carbon fibre composite, imbed fiber-optic grating sensor and provide solution preferably for the solution of this class problem.This sensor is made by optical fiber, very light weight; The more important thing is that it can directly imbed in the compound substance, between the two in conjunction with good.Because the inefficacy of carbon fibre composite is potential and widely, fiber-optic grating sensor is imbedded in the carbon fibre composite can provide health monitoring, evaluation and maintenance.
The quasi-distributed sensor-based system that the health monitoring of carbon fibre composite need be made up of many fiber-optic grating sensors.Fiber Bragg Grating FBG based on quasi-distributed sensing mainly is multiplexing in the frequency domain scope.Therefore, in order to distinguish the information from each sensing point, the wavelength coverage of each sensing grating must be different, thereby the quantity of sensing point can be subjected to the restriction of wavelength interval between the resolution of light source bandwidth, demodulated equipment and two gratings.Usually grating quantity that can be multiplexing is 15-20, and this uses and be subjected to very big restriction for the multi-point sensing monitoring.
Addressing this problem way is, uses the fine grating of the low light level of at room temperature identical low reflection (＜1%).
The wiring method of the fine grating of the low light level has following three kinds usually: transverse side is interfered exposure method, a point-wrting method and phase mask method.No matter all there are 2 deficiencies in which kind of fiber grating method for making.The one, must divest the optical fiber polymer coating of uv absorption in the conventional fiber preparing grating process, this can cause optical fiber to be subjected to extra damage, is difficult to guarantee the intensity and the integrality of fiber grating.The 2nd, above-mentioned three kinds of methods all are difficult at short notice, a large amount of making fiber grating on same optical fiber.The online technology that writes of low light level grid can solve this two problems well.
Can be subjected to the influence of some factors in the online ablation process of the fine grating of the low light level, it is unsuccessful to cause the fine grating of the low light level to write, and therefore, on-line monitoring is indispensable.Conventional on-line monitoring method is, light source sends light and enters optical fiber by shunt, and light is run into the laggard spectrometer of going into that is reflected behind the grating, thus the write state of the fine grating of the monitoring low light level.In this method, optical fiber remains static, and the on-line monitoring of optical grating reflection signal is realized easily.
Yet, optical fiber in pulling process by strand oscillator and take-up reel with fiber reel on take-up reel.Because take-up reel is not stopping rotation, the Transmission Fibers of shunt directly can not be connected with optical fiber on the take-up reel, otherwise can cause winding.Therefore, how signal is derived and the write state of the fine grating of the low light level is carried out on-line monitoring just become technical bottleneck.
Summary of the invention
The purpose of this invention is to provide the device and the application process of a kind of suitable optical fiber fine grating write state of the on-line monitoring low light level in pulling process, device has simple in structure, and good stability changes the characteristics such as convenient of coiling.
Purpose of the present invention is achieved through the following technical solutions:
This device is made up of rail plate, fiber rotation connector and V-type groove quick coupler etc.
Fiber rotation connector is made up of stator and rotor.Stator is fixed on the rail plate, and can move along rail plate.One end of stator is connected with input optical fibre, and the light that light source sends enters input optical fibre through shunt, the light that transmits in the input optical fibre by noncontact by in the output optical fibre that stator is coupled into rotor links to each other.Rotor is symmetrically installed with two driving levers up and down.Dial tube and be fixed on the take-up reel, group tube symmetry has up and down been opened two bar-shaped troughs.When stator was mobile on rail plate, driving lever can enter or withdraw from bar-shaped trough.
Be fixed with V-type groove quick coupler on the take-up reel edge, it can get up the optical fiber rapid abutting joint on output optical fibre and the take-up reel, and realizes treating the fixing of jointed fiber.
Take-up reel is fixed on the motor shaft by nut, dials tube and rotate with take-up reel when motor rotates, and dials a drive driving lever then and rotates, and driving lever drives the rotor rotation again.
Patent of the present invention has the following advantages and beneficial effect:
(1), is easy to realize driving lever and the combination of dialling tube and separates that is connected with flexible axle and compares, take-up reel is changed conveniently by adopting sliding rail structure.
(2) in the rotary course, driving lever and group tube can relatively move in vertical direction, have avoided the influence of fiber rotation connector and take-up reel off-centre.
(3) owing to used fiber rotation connector, make light reliable and stable in transmission course.
(4) V-type groove quick coupler has guaranteed that fiber alignment is convenient rapidly, has shortened the time that fiber orientation clamps greatly.
Description of drawings
Fig. 1 is a patent structure synoptic diagram of the present invention.
The fine grating monitoring principle of Fig. 2 low light level figure.
Wherein, the name of the Reference numeral in the accompanying drawing is called:
The 1-input optical fibre, the 2-stator, the 3-rotor, the 4-driving lever, 5-dials tube, 6-output optical fibre, 7-V type groove quick coupler, 8-motor, 9-take-up reel, 10-rail plate, 11-light source, 12-spectrometer, 13-Y type shunt.
Embodiment
The present invention is described in further detail below in conjunction with embodiment, but the embodiment of patent of the present invention is not limited thereto.
Embodiment:
As shown in Figure 1, overall, patent of the present invention mainly comprises the two large divisions: driving lever combines with separating mechanism and optical fiber fast with group tube and locatees binding clasp fast.Below in conjunction with accompanying drawing technical scheme of the present invention is described in detail.
The fine grating write state of low light level on-Line Monitor Device in a kind of fiber draw process of the present invention, this device comprise input optical fibre 1, stator 2, rotor 3, driving lever 4, dial tube 5, output optical fibre 6, V-type groove quick coupler 7, motor 8, take-up reel 9, rail plate 10, light source 11, spectrometer 12 and Y type shunt 13; Stator 2 is supported on the rail plate 10, stator 2 one ends connect input optical fibre 1, rotor 3 links to each other with output optical fibre 6, stator 2 and rotor 3 contactless couplings pass light, rotor 3 is symmetrically installed with two driving levers 4 up and down, dial tube 5 and be symmetrily processed with two bar-shaped troughs up and down, driving lever 4 can pass in and out the bar-shaped trough of dialling tube 5, dialling tube 5 is fixed on the take-up reel 9, take-up reel 9 is fixed on 8 in the motor, V-type groove quick coupler 7 is fixed on the edge of take-up reel 9, output optical fibre 6 passes in the V-type groove that the fiber alignment of bar-shaped trough on take-up reel 9 of dialling tube 5 be positioned at V-type groove quick coupler 7 and clamps, one end of Y type shunt 13 is connected with spectrometer 12 with light source 11 respectively, and the other end is connected with input optical fibre 1.
In the above-mentioned on-Line Monitor Device, stator 2 is supported on rail plate 10 upper edge rail plate move left and right.
Take-up reel 9 by screw retention on 8 in motor.
The application of the fine grating write state of low light level on-Line Monitor Device in the fiber draw process of the present invention, it is characterized in that: the situation that the writes real time on-line monitoring that is used for optical fiber low light level grid in pulling process, usage is the slide block on the mobile rail plate 10 of elder generation, make it to slide left, input optical fibre 1, stator 2, rotor 3 and driving lever 4 are moved to the left thereupon together, and driving lever 4 is withdrawed from from dial tube 5 bar-shaped troughs; Then take-up reel 9 being inserted in 8 in motor goes up and fixes with nut; The stator 2 that will be supported on again on the rail plate 10 moves right along rail plate 10, adjusts the direction of driving lever 4, makes it to enter in the bar-shaped trough of dialling tube 5; With the fiber alignment on output optical fibre 6 and the take-up reel 9 and be positioned in the V-type groove of V-type groove quick coupler 7 and clamp; At last input optical fibre 1 is docked with Y type shunt 13, promptly can carry out the on-line monitoring of the fine grating of the low light level.
In the on-Line Monitor Device of the present invention, pass light by contactless coupling between stator 2 and the rotor 3, stator 2 is fixed on the pole of rail plate, can be on rail plate move left and right, stator one end is connected with input optical fibre 1, and input optical fibre 1 is with respect to stator 2 transfixions.Two driving levers 4 are fixed on the rotor 3, and rotate freely with rotor.
In the on-line monitoring process, input optical fibre 1, stator 2, the pole of rail plate 10, light source 11, spectrometer 12, shunt 13 all are actionless; And rotor 3, driving lever 4 is dialled tube 5, output optical fibre 6, and V-type groove quick coupler 7, take-up reel 9 all rotates with motor shaft.
In the on-line monitoring process, the light that light source 11 sends enters input optical fibre 1 through Y type shunt 13, be coupled into output optical fibre 6 by stator 2 and rotor 3 noncontacts again, after the butt joint Optical Fiber Transmission in the V-type groove quick coupler 7 to grating, reflected light is again through V-type groove quick coupler 7, output optical fibre 6, rotor 3, stator 2, input optical fibre 1, enters the on-line monitoring that spectrometer 12 carries out the write state of the fine grating of the low light level at Y type shunt 13.
This monitoring device, its driving lever 4 symmetries be fixed on rotor about in the of 3 on the two ends, dial on the tube 5 and be symmetrily processed with two stripe shape grooves, driving lever 4 can enter and withdraw from the stripe shape groove of dialling tube 5 rapidly.Rotor 3 is when dialling tube 5 disalignments, and it is eccentric that driving lever 3 and dialling can be adjusted between the tube 5 automatically, avoids flexible axle to connect the trouble of bringing.V-type groove quick coupler can guarantee that fiber alignment finishes rapidly, satisfies technological requirement.After adopting rail plate, it is convenient that take-up reel 9 is changed.
Claims (5)
1. the fine grating write state of low light level on-Line Monitor Device in the fiber draw process, it is characterized in that: this device comprises input optical fibre (1), stator (2), rotor (3), driving lever (4), dials tube (5), an output optical fibre (6), V-type groove quick coupler (7), motor (8), take-up reel (9), rail plate (10), light source (11), spectrometer (12) and Y type shunt (13); Stator (2) is supported on the rail plate (10), stator (2) one ends connect input optical fibre (1), rotor (3) links to each other with output optical fibre (6), the contactless coupling of stator (2) and rotor (3) passes light, rotor (3) is symmetrically installed with two driving levers (4) up and down, dial tube (5) and be symmetrily processed with two bar-shaped troughs up and down, driving lever (4) can pass in and out the bar-shaped trough of dialling tube (5), dialling tube (5) is fixed on the take-up reel (9), take-up reel (9) is fixed on motor (8) axle, V-type groove quick coupler (7) is fixed on the edge of take-up reel (9), output optical fibre (6) passes in the V-type groove that the fiber alignment of bar-shaped trough with take-up reel (9) on of dialling tube (5) be positioned at V-type groove quick coupler (7) and clamping, one end of Y type shunt (13) is connected with spectrometer (12) with light source (11) respectively, and the other end is connected with input optical fibre (1).
2. the fine grating write state of low light level on-Line Monitor Device in a kind of fiber draw process according to claim 1, it is characterized in that: stator (2) is supported on rail plate (10) upper edge rail plate move left and right.
3. the fine grating write state of low light level on-Line Monitor Device in a kind of fiber draw process according to claim 1 is characterized in that: dial tube (5) by screw retention on take-up reel (9).
4. the fine grating write state of low light level on-Line Monitor Device in a kind of fiber draw process according to claim 1, it is characterized in that: take-up reel (9) is fixed on motor (8) axle by nut.
5. the application of the fine grating write state of low light level on-Line Monitor Device in the described fiber draw process of claim 1, it is characterized in that: the situation that the writes real time on-line monitoring that is used for optical fiber low light level grid in pulling process, usage is the slide block on the mobile rail plate of elder generation (10), make it to slide left, input optical fibre (1), stator (2), rotor (3) and driving lever (4) are moved to the left thereupon together, and driving lever (4) is withdrawed from from dial tube (5) bar-shaped trough; Then take-up reel (9) is inserted on motor (8) axle and with nut and fixes; The stator (2) that will be supported on again on the rail plate (10) moves right along rail plate (10), adjusts the direction of driving lever (4), makes it to enter in the bar-shaped trough of dialling tube (5); With the fiber alignment on output optical fibre (6) and the take-up reel (9) and be positioned in the V-type groove of V-type groove quick coupler (7) and clamp; At last input optical fibre (1) is docked with Y type shunt (13), promptly can carry out the on-line monitoring of the fine grating of the low light level.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011101512677A CN102221452B (en) | 2011-06-08 | 2011-06-08 | Real-time monitoring device for online writing weak optical fiber Bragg grating and application method thereof |
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| CN2011101512677A CN102221452B (en) | 2011-06-08 | 2011-06-08 | Real-time monitoring device for online writing weak optical fiber Bragg grating and application method thereof |
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| CN102221452A true CN102221452A (en) | 2011-10-19 |
| CN102221452B CN102221452B (en) | 2012-07-25 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105783956A (en) * | 2016-05-16 | 2016-07-20 | 武汉理工大学 | Large-capacity weak grating array processing apparatus and method |
| CN110082855A (en) * | 2018-01-26 | 2019-08-02 | 福州高意光学有限公司 | It is a kind of continuously to be inscribed for multi fiber grating and the apparatus and method of on-line testing |
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| DE69529392D1 (en) * | 1994-12-06 | 2003-02-20 | At & T Corp | Polarization diversity detection of optical signals through a polarization mode dispersive medium |
| CN101109649A (en) * | 2007-05-23 | 2008-01-23 | 武汉理工大学 | Optical fiber grating sensing measuring method and device for detecting running state of rotating machine |
| CN101299001A (en) * | 2008-04-29 | 2008-11-05 | 武汉理工大学 | Magnetic bearing electromagnetic force sensing device based on optical fiber grating and on-line measurement system |
| CN101986176A (en) * | 2010-10-26 | 2011-03-16 | 飞秒光电科技(西安)有限公司 | Optical fiber rotary connector |
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2011
- 2011-06-08 CN CN2011101512677A patent/CN102221452B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69529392D1 (en) * | 1994-12-06 | 2003-02-20 | At & T Corp | Polarization diversity detection of optical signals through a polarization mode dispersive medium |
| CN101109649A (en) * | 2007-05-23 | 2008-01-23 | 武汉理工大学 | Optical fiber grating sensing measuring method and device for detecting running state of rotating machine |
| CN101299001A (en) * | 2008-04-29 | 2008-11-05 | 武汉理工大学 | Magnetic bearing electromagnetic force sensing device based on optical fiber grating and on-line measurement system |
| CN101986176A (en) * | 2010-10-26 | 2011-03-16 | 飞秒光电科技(西安)有限公司 | Optical fiber rotary connector |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105783956A (en) * | 2016-05-16 | 2016-07-20 | 武汉理工大学 | Large-capacity weak grating array processing apparatus and method |
| CN110082855A (en) * | 2018-01-26 | 2019-08-02 | 福州高意光学有限公司 | It is a kind of continuously to be inscribed for multi fiber grating and the apparatus and method of on-line testing |
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|---|---|
| CN102221452B (en) | 2012-07-25 |
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Effective date of registration: 20170630 Address after: 430079 Hubei science and Technology Park, East Lake Development Zone, Wuhan, China Patentee after: Wuhan Feng Li Photoelectric Technology Co Ltd Address before: 430070 Hubei Province, Wuhan city Hongshan District Luoshi Road No. 122 Patentee before: Wuhan University of Technology |