CN103048064A - Production method for solder-packaged optical fiber macrobending loss temperature sensor - Google Patents
Production method for solder-packaged optical fiber macrobending loss temperature sensor Download PDFInfo
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- CN103048064A CN103048064A CN2012105360199A CN201210536019A CN103048064A CN 103048064 A CN103048064 A CN 103048064A CN 2012105360199 A CN2012105360199 A CN 2012105360199A CN 201210536019 A CN201210536019 A CN 201210536019A CN 103048064 A CN103048064 A CN 103048064A
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Abstract
A production method for a solder-packaged optical fiber macrobending loss temperature sensor includes the following steps: (1) a single-mode optical fiber with organic coating is adopted and curved into an optical fiber ring with the diameter of 15mm to 40mm, and concentrated nitric acid is used for blackening the surface of the optical fiber ring; (2) the surface of the optical fiber ring is chemically plated and electroplated to be metalized, and the diameter of the optical fiber with the metalized layer is controlled at 0.3mm to 0.5mm; (3) two aluminium alloy plates are adopted, and a groove which is in clearance fit with the metalized optical fiber ring is milled on one of the plates; (4) the optical fiber ring is placed in the groove, medium-temperature Al-Si soldering paste is filled into the groove, and the top surface is covered by the other aluminium alloy plate; (5) the optical fiber ring and the aluminium alloy plates are put into a thermostatic oven and heated until the temperature is 30 DEG C to 50 DEG C higher than the melting point of the solder, the temperature is kept for 30 to 50 seconds, and after slow cooling, the solder-packaged optical fiber macrobending loss temperature sensor is obtained. The production method has the advantages that the processing process is simple, and the produced sensor is convenient to mount and use.
Description
Technical field
The present invention relates to a kind of optical fiber macrobending loss manufacturing method of temperature sensor that welds encapsulation.
Background technology
Fibre Optical Sensor is to adopt optical fiber as the medium of light transmission, when light is propagated in optical fiber, the characteristic parameter (parameters such as amplitude, phase place, polarization state, wavelength) that characterizes light directly or indirectly changes because of external environment factor (such as temperature, stress, electric field, displacement etc.) effect, thereby can come sensing various to be measured as sensing element optical fibre device.Fibre Optical Sensor has advantages of that many traditional sensors do not have: for example, highly sensitive, corrosion-resistant, solenoid isolation is good, safe and reliable, many-sided adaptability is arranged; Lightweight, volume is little, easy bending, can make the Fibre Optical Sensor of arbitrary shape; Can be used for high pressure, electrical noise, high temperature, corrosion or other rugged surroundings.Because the advantage of Fibre Optical Sensor, in recent years optical fiber sensing technology development are rapidly, for example, fiber grating (FBG and LPG) type sensor, optical fibre bending sensor and distributed optical fiber sensing system and optical-fiber intelligent material etc.Utilizing the fiber optic sensing device can monitoring and the multiple physical quantity such as sensing temperature, pressure, strain, displacement, be very important research direction of sensory field of optic fibre to the measurement of temperature wherein.In recent years, adopt the temperature sensing research of Fibre Optical Sensor mainly to concentrate on special grating class (for example optical fiber bragg grating FBG, long period fiber grating LPFG) and interference of light meter class.The FBG that light sensitive effect is made is the most ripe in research and the application in temperature sensing field, yet the outstanding problem that exists is that serviceability temperature is low and price is more expensive: the long-term serviceability temperature of common I type FBG is no more than 200 ℃; Need special facture treatment process and equipment, so price is far above general optical fiber.The LPFG that elasto-optical effect writes has high temperature control (～100 pm/ ℃) and relatively high serviceability temperature (700-800 ℃); Yet because sensitivity own is too high, cause the problem that deformation effect is large by bending to be difficult to solve; And the realization of LPFG grating type high temp sensor needs the special doping of optical fiber, high performance laser instrument, writes grating or use photonic crystal fiber in the drawing optical fibers process.The F-P interferometer of the femtosecond laser parallel micromachining fabrication techniques of domestic Rao Yun river group report can anti-800 ℃ high temperature; The Mach – Zehnder interferometer of the femtosecond laser parallel micromachining fabrication techniques of the reports such as Ying Wang can be surveyed maximum temperature at 1100 ℃; But these interferometer class sensor-based system complex manufacturing technology need expensive laser micro-machining system.For pyrometric fiber optic sensing device the highest observable temperature of report being arranged is 1600 ℃, uses expensive ruby optical fiber or sapphire fiber but be only limited to.From existing document, there be expensive (ruby, sapphire fiber) in the Fibre Optical Sensor that is used for thermometric, serviceability temperature is on the low side (FBG), easily damage and easy strained interference (FBG and LPFG) and make the problems such as equipment (FBG, LPFG, interference of light meter) that need complex and expensive; Being badly in need of a kind of optical fibre device cheap, that manufacture craft simple, the serviceability temperature scope is wide comes part to address the above problem.
Summary of the invention
The object of the present invention is to provide a kind of optical fiber macrobending loss manufacturing method of temperature sensor that welds encapsulation, it is simple that it has processing technology, the advantage that the installation of sensors of making is easy to use.
The present invention is achieved like this, a kind of optical fiber macrobending loss manufacturing method of temperature sensor that welds encapsulation, it is characterized in that described method step is: (1) chooses arbitrarily one with the single-mode fiber of organism coating, single-mode fiber is curved the fiber optic loop of diameter 15-40mm, with red fuming nitric acid (RFNA) Darkening process is corroded on the fiber optic loop surface; (2) fiber optic loop that will corrode behind the Darkening process is carried out the metallization that surface chemical plating adds plating, and control is 0.3-0.5mm with the fibre diameter of metal layer; (3) getting two thickness is 2mm, size to fit is (for the ease of processing and location, the square aluminum alloy sheets length of side is greater than fiber optic loop diameter 5-8 millimeter) aluminium alloy plate, Milling Process goes out the suitable groove that forms clearance fit with the metallized optical fibre ring on plate therein; (4) will corrode melanism and metallized fiber optic loop and place in the groove, in groove, insert middle temperature Al-Si solder cream, another piece aluminium alloy plate will be covered upper surface; (5) fiber optic loop in the step (4) and aluminium alloy plate etc. are placed thermostatic oven, be heated to the above 30-50 of scolder fusing point ℃, insulation 30-50 second, Slow cooling can obtain can be used for the optical fiber macrobending loss sensor of temperature sensing.
Technique effect of the present invention is: the present invention plans to become with the Curved Single-mode Optical of organism coating the fiber optic loop of certain diameter (15mm-40mm); fiber optic loop is corroded melanism and metallization protection; then it is carried out the soldering encapsulation; be encapsulated in the aluminium alloy plate; preparation technology is simple, and the temperature sensor of preparation has advantages of easy location and installation and can be used for thermometric.
Description of drawings
Fig. 1 optical fiber macrobend ring schematic diagram.
Fig. 2 optical fiber macrobend ring soldering encapsulation schematic diagram.
Fig. 3 optical fiber macrobend power attenuation VS temperature sensing lab diagram.
In the drawings, 1, fiber optic loop 2, aluminium alloy plate.
Embodiment
Below in conjunction with drawings and Examples the present invention is done to elaborate,
Embodiment one, method step of the present invention are as follows:
(1) chooses arbitrarily a single-mode fiber, will curve with the single-mode fiber of organism coating the fiber optic loop 1 of diameter 20mm, such as Fig. 1, with red fuming nitric acid (RFNA) Darkening process is corroded on fiber optic loop 1 surface;
(2) fiber optic loop 1 that will corrode behind the Darkening process is carried out surface metalation, after the metallization, is 0.3mm with the fibre diameter of metal layer;
(3) get the aluminium alloy plate 2 of two 25 * 25 * 2mm, Milling Process goes out the suitable groove that forms clearance fit with metallized optical fibre ring 1 on plate therein, such as Fig. 2;
(4) will corrode melanism and metallized fiber optic loop 1 and place in the groove, in groove, insert middle temperature Al-Si solder cream, another piece aluminium alloy plate will be covered upper surface;
(5) fiber optic loop 1 in the step (4) and aluminium alloy plate 2 etc. are placed thermostatic oven, be heated to 606 ℃ (Al-Si scolder fusing point is 576 ℃), be incubated 35 seconds, Slow cooling can obtain can be used for the optical fiber macrobending loss sensor of temperature sensing.
Embodiment two, method step of the present invention are as follows:
(1) chooses arbitrarily a single-mode fiber, will curve with the single-mode fiber of organism coating the fiber optic loop 1 of diameter 25mm, such as Fig. 1, with red fuming nitric acid (RFNA) Darkening process is corroded on fiber optic loop 1 surface;
(2) fiber optic loop 1 that will corrode behind the Darkening process is carried out surface metalation, after the metallization, is 0.35mm with the fibre diameter of metal layer;
(3) get the aluminium alloy plate 2 of two 30 * 30 * 2mm, Milling Process goes out the suitable groove that forms clearance fit with metallized optical fibre ring 1 on plate therein, such as Fig. 2;
(4) will corrode melanism and metallized fiber optic loop 1 and place in the groove, in groove, insert middle temperature Al-Si solder cream, another piece aluminium alloy plate 2 will be covered upper surface;
(5) fiber optic loop 1 in the step (4) and aluminium alloy plate 2 etc. are placed thermostatic oven, be heated to 608 ℃ (Al-Si scolder fusing point is 576 ℃), be incubated 40 seconds, Slow cooling can obtain can be used for the optical fiber macrobending loss sensor of temperature sensing.
Embodiment three, method step of the present invention are as follows:
(1) chooses arbitrarily a single-mode fiber, will curve with the single-mode fiber of organism coating the fiber optic loop 1 of diameter 30mm, such as Fig. 1, with red fuming nitric acid (RFNA) Darkening process is corroded on fiber optic loop 1 surface;
(2) fiber optic loop 1 that will corrode behind the Darkening process is carried out surface metalation, after the metallization, is 0.38mm with the fibre diameter of metal layer;
(3) get the aluminium alloy plate 2 of two 35 * 35 * 2mm, Milling Process goes out the suitable groove that forms clearance fit with metallized optical fibre ring 1 on plate therein, such as Fig. 2;
(4) will corrode melanism and metallized fiber optic loop 1 and place in the groove, in groove, insert middle temperature Al-Si solder cream, another piece aluminium alloy plate 2 will be covered upper surface;
(5) fiber optic loop 1 in the step (4) and aluminium alloy plate 2 etc. are placed thermostatic oven, be heated to 609 ℃ (Al-Si scolder fusing point is 576 ℃), be incubated 37 seconds, Slow cooling can obtain can be used for the optical fiber macrobending loss sensor of temperature sensing.
The optical fiber macrobending loss sensor that the present invention makes in test, its optical fiber macrobend power attenuation VS temperature sensing figure such as Fig. 3 measure reliably, precision is high.
Claims (1)
1. optical fiber macrobending loss manufacturing method of temperature sensor that welds encapsulation is characterized in that said method comprising the steps of:
(1) chooses arbitrarily one with the single-mode fiber of organism coating, single-mode fiber is curved the fiber optic loop of diameter 15-40mm, with red fuming nitric acid (RFNA) Darkening process is corroded on the fiber optic loop surface;
(2) fiber optic loop that will corrode behind the Darkening process is carried out the metalized that surface chemical plating adds plating, and control is 0.3-0.5mm with the fibre diameter of metal layer;
(3) getting two thickness is 2mm, and the length of side is greater than the aluminium alloy plate of fiber optic loop diameter 5-8 millimeter, and Milling Process goes out the groove that forms clearance fit with the metallized optical fibre ring on plate therein;
(4) will corrode melanism and metallized fiber optic loop and place in the groove, in groove, insert middle temperature Al-Si solder cream, another piece aluminium alloy plate will be covered upper surface;
(5) fiber optic loop in the step (4) and aluminium alloy plate are placed thermostatic oven together, be heated to the above 30-50 of scolder fusing point ℃, insulation 30-50 second, Slow cooling can obtain can be used for the optical fiber macrobending loss sensor of temperature sensing.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104152901A (en) * | 2014-08-05 | 2014-11-19 | 南昌大学 | Method for embedding fiber grating into metal matrix to prepare high-temperature resisting and intelligent metal structure |
| CN104198014A (en) * | 2014-09-06 | 2014-12-10 | 中北大学 | Dark field detection based optical-fiber macrobending coupling structure liquid-level probe |
| CN104359586A (en) * | 2014-10-11 | 2015-02-18 | 扬州市润特光电科技有限公司 | Optical fiber temperature sensor |
| CN104482984A (en) * | 2014-12-13 | 2015-04-01 | 中北大学 | Liquid level sensor based on POF (plastic optical fiber) optical fiber macrobending |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104152901A (en) * | 2014-08-05 | 2014-11-19 | 南昌大学 | Method for embedding fiber grating into metal matrix to prepare high-temperature resisting and intelligent metal structure |
| CN104152901B (en) * | 2014-08-05 | 2016-06-15 | 南昌大学 | Fiber grating is embedded the method that metallic matrix makes high temperature resistant smart metal structure |
| CN104198014A (en) * | 2014-09-06 | 2014-12-10 | 中北大学 | Dark field detection based optical-fiber macrobending coupling structure liquid-level probe |
| CN104198014B (en) * | 2014-09-06 | 2017-08-25 | 中北大学 | Optical fiber macrobend coupled structure liquid-level probe based on dark field detection |
| CN104359586A (en) * | 2014-10-11 | 2015-02-18 | 扬州市润特光电科技有限公司 | Optical fiber temperature sensor |
| CN104482984A (en) * | 2014-12-13 | 2015-04-01 | 中北大学 | Liquid level sensor based on POF (plastic optical fiber) optical fiber macrobending |
| CN104482984B (en) * | 2014-12-13 | 2018-07-17 | 中北大学 | Liquid level sensor based on POF optical fiber macrobends |
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Application publication date: 20130417 |