CN102252776A - High-temperature curing device for fiber bragg grating sensor - Google Patents
High-temperature curing device for fiber bragg grating sensor Download PDFInfo
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- CN102252776A CN102252776A CN2011100774403A CN201110077440A CN102252776A CN 102252776 A CN102252776 A CN 102252776A CN 2011100774403 A CN2011100774403 A CN 2011100774403A CN 201110077440 A CN201110077440 A CN 201110077440A CN 102252776 A CN102252776 A CN 102252776A
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Abstract
The invention relates to a high-temperature curing device for a fiber bragg grating sensor, wherein a slide bar is arranged at the upper end of a base bracket; a left holder capable of moving leftwards and rightwards along the slide bar is arranged at the left end of the slide bar, and a right holder capable of moving leftwards and rightwards along the slide bar is arranged at the right end; a left fiber fixing clamp capable of moving upwards and downwards is arranged at the lower part of the left holder, and a right fiber fixing clamp capable of moving upwards and downwards is arranged at the lower part of the right holder; a heating device and an operating platform rack for placing a sensor base to be encapsulated are sequentially arranged between the left holder and the right holder on the slide bar from left to right; and a temperature control instrument which is connected with the heating device through a wire is arranged on a bracket. The high-temperature curing device provided by the invention has the advantages of small volume, simplicity in structure, low energy consumption, simplicity and convenience in operation and the like, can be used in a temperature range from 60-550 DEG C and realizes the high-temperature curing encapsulation of the fiber bragg grating sensor. The high-temperature curing device provided by the invention can be used for other small-sized devices or components which need high-temperature bonding.
Description
Technical field
The invention belongs to the fiber optic sensor technology field, be specifically related to a kind of hot setting device of fiber-optic grating sensor.
Background technology
Fiber-optic grating sensor is as a kind of novel optical passive component, because of its have anti-electromagnetic interference (EMI), volume little, in light weight, corrosion-resistant, be easy to realize advantages such as wavelength-division, time-division and space division multiplexing, become the emerging problem of current sensory field research.Fiber-optic grating sensor utilizes the variation of fiber grating with external physical quantity, can cause the characteristics of the centre wavelength drift of reflectance spectrum or transmitted spectrum as the variation of pressure, temperature and strain, can realize measurement to physical quantity by detecting wavelength shift.Bare optical fibers and bare optical gratings is all very low to the response sensitivity of temperature and strain, the own very thin of bare optical fibers and bare optical gratings in addition, and intensity is low, directly it can't be satisfied as sensor that the different engineering of various measurement ranges is used and the construction of extensive style, the requirement of installation.Therefore, must carry out functional encapsulation process, realizing, thereby satisfy the site operation of heavy construction structure and the requirement of transducer sensitivity to the protection of fiber grating with to the response enhanced sensitivity of temperature, strain to bare optical fibers and bare optical gratings.When fiber-optic grating sensor is used for the worst hot case environment, need fiber grating be fixed on the base material with high-temperature curing agent, therefore need corresponding heat curing equipment, heat curing equipment commonly used is baking oven, the maximum heating temperature of present homemade baking oven is 400 ℃, baking oven continuous use under maximum temperature had both expended the energy equipment failure had also taken place easily, therefore, be necessary to design a kind of miniaturization, low energy consumption, multi-functional high temperature fiber grating solidification equipment, to satisfy the needs of fiber-optic grating sensor high temperature encapsulation.
Summary of the invention
Technical matters to be solved by this invention is to overcome the deficiency of existing heat curing equipment, and a kind of fiber-optic grating sensor hot setting device of reasonable in design, simple in structure, easy to operate, low energy consumption is provided.
Solving the problems of the technologies described above the technical scheme that is adopted is: be provided with the root slide bar in the base support upper end, the left end of slide bar is provided with the left holding frame along the slide bar move left and right, right-hand member is provided with the right holding frame along the slide bar move left and right, holding frame bottom, a left side is provided with the optical fiber left side geometrical clamp that moves up and down, right holding frame bottom is provided with the right geometrical clamp of the optical fiber that moves up and down, from left to right be disposed with heating arrangement on the slide bar between left holding frame and the right holding frame and be used to place the operating platform frame of sensor base to be packaged, the temperature controller that links to each other with heating arrangement by lead is set on the support.
Heating arrangement of the present invention is: the heating arrangement fixed mount is arranged on the slide bar, heating arrangement fixed mount right side is provided with ring frame on the slide bar, heating arrangement fixed mount bottom is provided with the heating base that is processed with through hole, the heating base right part is provided with right-hand member and is connected in outer tube on the ring frame, the interior pipe of heating that outside surface is wound with resistance wire is set in the outer tube of heating base right part, is provided with temperature sensor in the pipe in the heating.
Pipe is quartz glass tube in outer tube of the present invention and the heating.
Operating platform frame of the present invention is: fixed block is arranged on the slide bar, and the fixed block bottom is provided with the platform bar, and platform bar bottom is provided for placing the operating platform of sensor base to be packaged.
The present invention adopts the resistance wire that is spirally wound on the interior pipe of heating as high temperature heat source, outer tube is an insulating tube, the sensor base that will be used to encapsulate is put into operating platform, to be placed on the light transmitting fiber of fiber grating on the sensor base, fibre-optic two ends are fixed on left holding frame and the right holding frame, by regulating the perpendicular suitable position of operating platform, sensor base and fibre-optic height are transferred to suitable position, by regulating the horizontal level of operating platform frame,, sensor base and light transmitting fiber manage the encapsulation of realization high temperature in the heating thereby axially being inserted.Advantages such as the present invention is specifically long-pending little, simple in structure, energy consumption is low, easy and simple to handle can be used in 60～550 ℃ of temperature ranges, realize the hot setting encapsulation to fiber-optic grating sensor.The present invention also can be used on other small-sized device or parts of needing high temperature bonding.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention 1.
Fig. 2 is the structural representation of heating arrangement 3 among Fig. 1.
Fig. 3 is the structural representation of operating platform frame 5 among Fig. 1.
Fig. 4 is the response curve that adopts the quartz substrate fiber-optical grating temperature sensor of the present invention's encapsulation.
Fig. 5 is the spectrogram that adopts the quartz substrate fiber-optical grating temperature sensor of the present invention's encapsulation.
Fig. 6 is the response curve that adopts the beryllium-bronze substrate fiber-optical grating temperature sensor of the present invention's encapsulation.
Fig. 7 is the spectrogram that adopts the beryllium-bronze substrate fiber-optical grating temperature sensor of the present invention's encapsulation.
Embodiment
The present invention is described in more detail with each embodiment below in conjunction with accompanying drawing, but the invention is not restricted to these embodiment.
In Fig. 1, the fiber-optic grating sensor hot setting device of present embodiment is made of base support 1, left holding frame 2, heating arrangement 3, slide bar 4, operating platform frame 5, right holding frame 6, temperature controller 7 connections.
There are 2 horizontal sliding bars that are parallel to each other 4 on top at the base support 1 that takes the shape of the letter U by thread connection, left side holding frame 2 is installed in the left end of slide bar 4, and can be along slide bar 4 move left and right, holding frame 2 bottoms, a left side are optical fiber left side geometrical clamp 2-1, by thread connection the height set screw is arranged on the holding frame 2 of a left side, the height of optical fiber left side geometrical clamp 2-1 can up-down adjustment, optical fiber left side geometrical clamp 2-1 can be fixed on desired height by the height set screw, optical fiber left side geometrical clamp 2-1 goes up has trip bolt by thread connection, and the trip bolt on the geometrical clamp 2-1 of an optical fiber left side is used for fixing fiber grating 8 left ends.Right holding frame 6 is installed in the right-hand member of slide bar 4, and can be along slide bar 4 move left and right, right holding frame 6 bottoms are the right geometrical clamp 6-1 of optical fiber, by thread connection the height set screw is arranged on the right holding frame 6, the height of the right geometrical clamp 6-1 of optical fiber can up-down adjustment, the right geometrical clamp 6-1 of optical fiber can be fixed on desired height by regulating the height set screw, the right geometrical clamp 6-1 of optical fiber goes up has trip bolt by thread connection, and the trip bolt of the right geometrical clamp 6-1 of optical fiber is used for fixing the right-hand member of fiber grating 8.Left holding frame 2 right sides are equipped with heating arrangement 3 on the slide bar 4, heating arrangement 3 can be along slide bar 4 move left and right, during encapsulation, the left end of fiber grating 8 is passed heating arrangement 3 be fixed on optical fiber left side geometrical clamp 2-1, the right-hand member of fiber grating 8 is fixed on the right geometrical clamp 6-1 of optical fiber of right holding frame 6.Heating arrangement 3 right sides are equipped with operating platform frame 5 on the slide bar 4, and operating platform frame 5 can be along slide bar 4 move left and right, and operating platform frame 5 is used to place sensor base to be packaged.The bottom of support 1 is with the screw threads for fastening connector temperature controller 7 that has been fixedly connected, and temperature controller 7 links to each other with heating arrangement 3 by lead.
In Fig. 1,2, the heating arrangement 3 of present embodiment is made of pipe 3-5, resistance wire 3-6, temperature sensor 3-7 connection in heating arrangement fixed mount 3-1, heating base 3-2, outer tube 3-3, ring frame 3-4, the heating.
Heating arrangement fixed mount 3-1 is installed on the slide bar 4, the right side of heating arrangement fixed mount 3-1 is equipped with ring frame 3-4 on the slide bar 4, heating arrangement fixed mount 3-1, the high and low position of ring frame 3-4 can be regulated, heating arrangement fixed mount 3-1 and ring frame 3-4 can be along slide bar 4 move left and right, bottom at heating arrangement fixed mount 3-1 is equipped with heating base 3-2 with trip bolt, be processed with the horizontal through hole that passes for fiber grating 8 on the heating base 3-2, at heating base 3-2 right-hand member with the gluing outer tube 3-3 that is connected to of TS767, TS767 glue is sold by Tianshan Mountains, Beijing new material technology company, the right-hand member of outer tube 3-3 is installed on the ring frame 3-4, heating base 3-2 right-hand member is managed 3-5 with gluing being connected to of TS767 in the outer tube 3-3 in the heating, heating base 3-2, outer tube 3-3, the axis of pipe 3-5 coincides in the heating, be wound with the resistance wire 3-6 that spiral fashion is arranged on the pipe 3-5 outside surface in the heating, resistance wire 3-6 links to each other with temperature controller 7 by lead, pipe 3-5 is transparent quartz glass tube in the outer tube 3-3 of present embodiment and the heating, heating base 3-2, outer tube 3-3 can be that different geometrical size is changed according to different Demand Design with the interior pipe of heating 3-5, in heating, be provided with temperature sensor 3-7 in the pipe 3-5, temperature sensor 3-7 links to each other with temperature controller 7 by lead, temperature sensor 3-7 converts received temperature signal to electric signal and outputs to temperature controller 7, temperature controller 7 is realized solidification temperature is controlled automatically according to temperature controlling resistance silk 3-6 and the power connection or the disconnection of prior setting.
In Fig. 3, the operating platform frame 5 of present embodiment is by fixed block 5-1, operating platform 5-2, platform bar 5-3 connects formation, fixed block 5-1 is installed on the slide bar 4, and can be along slide bar 4 move left and right, fixed block 5-1 bottom is installed with platform bar 5-3 with trip bolt, the welding of platform bar 5-3 bottom is connected with operating platform 5-2, during encapsulation, sensor base 5-4 to be packaged is placed on the operating platform 5-2, fiber grating 8 to be packaged is placed on the sensor base 5-4 to be packaged, operating platform 5-2 can vertically move up and down, and fixed block 5-1 goes up has trip bolt by thread connection, and trip bolt is used for fixing the position of operating platform 5-2.
The course of work of the present invention is as follows:
When the packaged fiber grating sensor, tighten the trip bolt of the optical fiber left side geometrical clamp 2-1 of left holding frame 2 lower ends, the optical fiber left side geometrical clamp 2-1 that the left end of fiber grating 8 is fixed on left holding frame 2 goes up, tightens the trip bolt of the right geometrical clamp 6-1 of optical fiber of right holding frame 6 lower ends, the right-hand member of fiber grating 8 is fixed on the right geometrical clamp 6-1 of optical fiber of right holding frame 6, sensor base 5-4 to be packaged is placed on the operating platform 5-2, adjust operating platform 5-2, fiber grating 8 is contacted with sensor base 5-4.Mobile left holding frame 2 and right holding frame 6 apply prestress for fiber grating 8.Coat hardening agent at fiber grating 8 and the bonding location of sensor base 5-4, mobile heating device 3 makes the position that scribbles hardening agent be positioned at the middle part of heating pipe 3-5, in heating, insert temperature sensor 3-7 in the pipe 3-5, adjust the position of temperature sensor 3-7, make it near bonding location, adjustment obtains required solidification temperature by electric current, the voltage of resistance wire 3-6, make the temperature of solidification process keep stable by temperature controller 7, promptly finish the high temperature bonding encapsulation of sensor to be packaged according to required heating heat time heating time of hardening agent.
In order to verify beneficial effect of the present invention, the inventor adopts the high temperature fiber-optical grating temperature sensor of the embodiment of the invention 1 encapsulation chamber research experiment that experimentizes, and various experiment situations are as follows:
Experimental apparatus: spectroanalysis instrument, model are AQ6319, are produced by Japanese Yokogawa company; Wideband light source, model are ASE-CL, are produced by Shenzhen Lang Guang company; Vacuum drying chamber, model are DZ-1BC, are produced by Tianjin Tai Site company.
1, adopt the present invention to encapsulate the quartz substrate fiber-optical grating temperature sensor
The fiber-optical grating temperature sensor structure: the rectangle quartz substrate, length * wide * height is 30mm * 8mm * 2mm, and left and right sides tail optical fiber is left at two ends, and long is 600mm.
Adopt the fiber-optic grating sensor hot setting device of the embodiment of the invention 1 preparation that fiber grating 8 is packaged on the quartz substrate, the wavelength of encapsulation back fiber-optical grating temperature sensor is seen Fig. 4 with the response curve of temperature, with the spectrum of spectroanalysis instrument measuring fiber grating temperature sensor, the spectrum of fiber-optical grating temperature sensor is seen Fig. 5.As shown in Figure 4, the quartz substrate fiber-optical grating temperature sensor peak wavelength and the temperature of the present invention's encapsulation are linear, and the fit equation of test peak wavelength is:
λ＝0.0125t+1555.0013(nm)
0.0125nm/ ℃ of temperature-responsive sensitivity; The linear fit degree is:
R
2＝0.9989
As shown in Figure 5, the central wavelength lambda at room temperature of the fiber-optical grating temperature sensor after the encapsulation is 1555.4006nm, and three dB bandwidth is 0.1984nm, and waveform bandwidth had not both had broadening, did not have again and warbled and distort, and has eliminated the limit mould side lobe effect of reflection wave.
2, adopt the present invention to encapsulate beryllium-bronze substrate fiber-optical grating temperature sensor
The structure of fiber-optical grating temperature sensor: the external diameter of beryllium-bronze pipe substrate is that 4mm, wall thickness are 1mm, and left and right sides tail optical fiber is left at two ends, and long is 1200mm.
Adopt the fiber-optic grating sensor hot setting device of the embodiment of the invention 1 preparation that fiber grating is packaged in the beryllium-bronze substrate tube, the wavelength of encapsulation back fiber-optical grating temperature sensor is seen Fig. 6 with the response curve of temperature, with the spectrum of spectroanalysis instrument measuring fiber grating temperature sensor, the spectrum of fiber-optical grating temperature sensor is seen Fig. 7.As shown in Figure 6, the peak wavelength and the temperature of the fiber-optical grating temperature sensor of the beryllium-bronze substrate tube of the present invention's encapsulation are linear, and test peak wavelength fit equation is:
λ＝0.0314t+1573.7236(nm)
Temperature-responsive sensitivity is 0.0314nm/ ℃, and the linear fit degree is:
R
2＝0.9989
As shown in Figure 7, the central wavelength lambda at room temperature of the fiber-optical grating temperature sensor after the encapsulation is 1574.4984nm, and three dB bandwidth is 0.2345nm, and waveform bandwidth had not both had broadening, did not have again and warbled and distort, and has eliminated the limit mould side lobe effect of reflection wave.
Claims (4)
1. fiber-optic grating sensor hot setting device, it is characterized in that: be provided with 2 slide bars (4) in base support (1) upper end, the left end of slide bar (4) is provided with along the left holding frame (2) of slide bar (4) move left and right, right-hand member is provided with along the right holding frame (6) of slide bar (4) move left and right, holding frame (2) bottom, a left side is provided with the optical fiber left side geometrical clamp (2-1) that moves up and down, right holding frame (6) bottom is provided with the right geometrical clamp (6-1) of the optical fiber that moves up and down, slide bar (4) is gone up between left holding frame (2) and the right holding frame (6) and from left to right is disposed with heating arrangement (3) and is used to place the operating platform frame (5) of sensor base to be packaged (7), and support (1) is gone up the temperature controller (7) that links to each other with heating arrangement (3) by lead is set.
2. according to the described fiber-optic grating sensor hot setting of claim 1 device, it is characterized in that said heating arrangement (3) is: heating arrangement fixed mount (3-1) is arranged on the slide bar (4), slide bar (4) is gone up heating arrangement fixed mount (3-1) right side and is provided with ring frame (3-4), heating arrangement fixed mount (3-1) bottom is provided with the heating base (3-2) that is processed with through hole, heating base (3-2) right part is provided with right-hand member and is connected in outer tube (3-3) on the ring frame (3-4), the interior pipe of heating (3-5) that outside surface is wound with resistance wire (3-6) is set in heating base (3-2) the right part outer tube (3-3), is provided with temperature sensor (3-7) in the pipe (3-5) in the heating.
3. according to the described fiber-optic grating sensor hot setting of claim 2 device, it is characterized in that: pipe (3-5) is quartz glass tube in said outer tube (3-3) and the heating.
4. according to the described fiber-optic grating sensor hot setting of claim 1 device, it is characterized in that said operating platform frame (5) is: fixed block (5-1) is arranged on the slide bar (4), fixed block (5-1) bottom is provided with platform bar (5-3), and platform bar (5-3) bottom is provided for placing the operating platform (5-2) of sensor base to be packaged (5-4).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110077440.3A CN102252776B (en) | 2011-03-29 | 2011-03-29 | High-temperature curing device for fiber bragg grating sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110077440.3A CN102252776B (en) | 2011-03-29 | 2011-03-29 | High-temperature curing device for fiber bragg grating sensor |
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| CN102252776B CN102252776B (en) | 2013-04-17 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105583484A (en) * | 2015-12-16 | 2016-05-18 | 北京遥测技术研究所 | Optical fiber sensor glue-free packaging device and method |
| CN106979791A (en) * | 2017-04-20 | 2017-07-25 | 苏州南智传感科技有限公司 | Interior heating FBG sensor and its method for packing |
| CN111811616A (en) * | 2020-08-07 | 2020-10-23 | 四川泛华航空仪表电器有限公司 | Optical fiber liquid level sensor based on gas-liquid thermal conductivity differential measurement |
| CN112682404A (en) * | 2019-10-18 | 2021-04-20 | 航天科工惯性技术有限公司 | Bonding clamp for temperature sensor |
| CN116412932A (en) * | 2023-06-07 | 2023-07-11 | 山东千颐科技有限公司 | Mining distributed optical fiber temperature measuring device and application method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105583484A (en) * | 2015-12-16 | 2016-05-18 | 北京遥测技术研究所 | Optical fiber sensor glue-free packaging device and method |
| CN106979791A (en) * | 2017-04-20 | 2017-07-25 | 苏州南智传感科技有限公司 | Interior heating FBG sensor and its method for packing |
| CN112682404A (en) * | 2019-10-18 | 2021-04-20 | 航天科工惯性技术有限公司 | Bonding clamp for temperature sensor |
| CN111811616A (en) * | 2020-08-07 | 2020-10-23 | 四川泛华航空仪表电器有限公司 | Optical fiber liquid level sensor based on gas-liquid thermal conductivity differential measurement |
| CN116412932A (en) * | 2023-06-07 | 2023-07-11 | 山东千颐科技有限公司 | Mining distributed optical fiber temperature measuring device and application method thereof |
| CN116412932B (en) * | 2023-06-07 | 2023-08-18 | 山东千颐科技有限公司 | Mining distributed optical fiber temperature measuring device and application method thereof |
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