CN103273183A - Capillary spot welding packaging process for applying prestressing force on fiber bragg grating - Google Patents
Capillary spot welding packaging process for applying prestressing force on fiber bragg grating Download PDFInfo
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- CN103273183A CN103273183A CN2013102388619A CN201310238861A CN103273183A CN 103273183 A CN103273183 A CN 103273183A CN 2013102388619 A CN2013102388619 A CN 2013102388619A CN 201310238861 A CN201310238861 A CN 201310238861A CN 103273183 A CN103273183 A CN 103273183A
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Abstract
The present invention is to provide a kind of pair of fiber gratings to apply prestressed capillary type spot welding packaging technology. It is the following steps are included: take a fiber grating, and grating is naked grating at gate part, and surface is carried out surface metalation, metallization thickness about 30 ~ 50 without any protective layer
; The grating of metallization protection is partially loaded in metal capillary, metal capillary is placed horizontally in the stria of metal tube mounting plate upper surface; Grating metalized portion connects mash welder cathode, applies certain prestressing force to fiber grating and carries out spot welding encapsulation to capillary both ends using improvement Handheld double-electrode portable point welding machine later. This packaging technology is simple, easy for installation, effectively can realize enhanced sensitivity, protection packaging to fiber grating.
Description
Technical field
The present invention relates to the applied technical field of fiber grating, relate in particular to and a kind of fiber grating is applied prestressed capillary type spot welding packaging technology.
Background technology
Fiber Bragg Grating FBG is a kind of passive device of making in optical fiber, the distribution of a kind of refractive index cycle of in optical fiber, setting up vertically, and it can have reflection or loss effect to the light near the certain bandwidth the specific wavelength.Because simple in structure, plurality of advantages such as volume is little, in light weight, anti-electromagnetic interference that fiber grating has can be formed intelligent distributed sensor networks.Therefore it is very suitable in the adverse circumstances such as civil engineering, Aero-Space the detection to temperature, pressure and other parameters.Its operation principle mainly is by with certain device variation of tested parameter being converted into strain or the variations in temperature that acts on the fiber grating, thereby causes the drift of fiber grating centre wavelength.By setting up and the temperature of demarcation fiber grating or the relation of strain-responsive and the variation of tested parameter, just can be detected measured variation by the drift value of fiber grating centre wavelength.Yet temperature, the strain sensitivity of naked grating are low, can not satisfy the sensing requirement, therefore will manage to improve temperature, strain sensitivity.Moreover, because being ultraviolet light, fiber grating writes at the single mode silica fibre of removing coat, tiny matter is crisp, frangibility; Though the chemical property of silica fibre is more stable, it is that it is antiacid and the alkali resistant ability is all relatively poor.Therefore, bare optical fibers and bare optical gratings being carried out effective encapsulation process, is realization is applied fiber grating in fields such as civil engineering, Aero-Space a necessary link.Yet there are no the relevant report of fiber grating capillary type bipolar electrode spot welding packaging technology.The present invention carries out on the theory analysis ground foundation at the spot-welding technology to the capillary zinc pipe, propose to adopt the bipolar electrode reserve energy spot welding machine that fiber grating capillary zinc pipe is carried out the spot welding encapsulation, optical fiber grating temperature sensitivity after the encapsulation is greatly improved, centre wavelength has good stability, and does not produce chirp phenomenon.
According to the documents and materials of the method for packing of existing fiber grating, it is the most frequently used method for packing that fiber grating is encapsulated in the capillary.The tubular type method for packing of having reported all is to adopt polymer to fill metal capillary to realize encapsulation, its encapsulation process operating difficulties, especially injection of polymer melt in the capillary; After the encapsulation, there are weak points such as the temperature sensitizing multiple is low, temperature-responsive speed is slow, centre wavelength instability.
Summary of the invention
The object of the present invention is to provide a kind of fiber grating to be applied prestressed capillary type spot welding packaging technology, it has simple to operation, has kept the high and fireballing advantage of temperature-responsive of Metal Packaging enhanced sensitivity multiple.
The present invention is achieved like this; fiber grating is applied prestressed capillary type spot welding packaging technology be may further comprise the steps: (1) gets a fiber grating, and it is naked grating that grating becomes gate part, the no any protective layer in surface; it is carried out surface metalation, and metallization thickness is 30 ~ 50
(2) the grating position of the fiber grating after will the metallizing metal capillary of packing into, the metal capillary level is placed in the stria of metal tube installing plate, is lined with one deck electro-insulating rubber between capillary and the metal tube installing plate, has installed and fixed metal capillary; (3) grating metalized portion tie point welding machine negative pole is regulated displacement, and fiber grating is applied prestressing force, utilizes improvement hand-held bipolar electrode portable point welding machine that the spot welding encapsulation is carried out at the capillary two ends; Described metal capillary material is that purity is 99.99% zinc, and capillary zinc pipe internal diameter is more than or equal to 0.3mm, and external diameter is less than or equal to 1.2mm, pipe thickness 0.2mm, length 40 ~ 60mm; Described metal tube installing plate thickness is 5.0 ~ 8.0mm, and length and width are 80mm; Milling a groove on the metal tube installing plate upper surface symmetrical center line, width 3.0mm, degree of depth 2.0mm, length 80mm; Pad one deck electro-insulating rubber lining plays the effect of isolated metal tube and metal tube installing plate conduction in the groove, and its thickness is determined jointly by stria size and metal tube size; The adjustable range of described bipolar electrode portable point welding machine two electrode spacings is 0 ~ 80mm, electrode length 30mm, diameter 1.4mm, end diameter 1.0mm.
Technique effect of the present invention is: (1) packaging technology of the present invention had both kept the advantage of Metal Packaging, fast such as temperature control height, response speed, anti-sensitization and fiber grating had good protective effect, its than existing polymer fill, to glued joint method for packing better for the fiber grating effect of enhanced sensitivity, Applicable temperature is wider; (2) packaging technology of the present invention is simple to operate: directly spot weld operation is carried out at capillary zinc pipe two ends, more easy to operate than filled polymer in the capillary, cost is low, and whole packaging technology does not need to use complex device or instrument, need not use any precious materials.
Description of drawings
Fig. 1 is capillary type spot welding encapsulation schematic diagram.
Fig. 2 is the bipolar electrode structure chart.
Fig. 3 is metal tube installing plate front view.
Fig. 4 is metal tube installing plate vertical view.
Fig. 5 is metal tube installing plate left view.
Fig. 6 is embodiment one test result figure (a).
Fig. 7 is embodiment one test result figure (b).
Fig. 8 is embodiment two test result figure (a).
Fig. 9 is embodiment two test result figure (b).
Figure 10 is embodiment three test result figure (a).
Figure 11 is embodiment three test result figure (b).
1, optical fiber 2, metal capillary 3, Fiber Bragg Grating FBG 4, the coat of metal 5, mash welder main control system 6, electrode.
The specific embodiment
The present invention will be further described below in conjunction with the drawings and specific embodiments:
Material parameter:
Zinc pipe: the zinc pipe that adopts two kinds of different parameters: internal diameter 0.3mm, external diameter 0.7mm, length 40mm; Internal diameter 0.5mm, external diameter 0.9mm, length 50mm; External diameter internal diameter 0.8mm, external diameter 1.2mm, length 60mm;
Metal tube installing plate: the wide 3.0mm of stria of metal tube is installed, dark 2.0mm, length 80mm;
Electro-insulating rubber: adopt two kinds of electro-insulating rubbers that thickness is different: thickness 0.7mm, length 60mm; Thickness 0.6mm, length 60mm; Thickness 0.4mm, length 60mm.
Example one: choosing internal diameter is 0.3mm, and external diameter is the capillary zinc pipe of 40mm for 0.7mm length, and thickness is 0.7mm, and length is the electro-insulating rubber of 60mm;
The concrete operations step: get a fiber grating (25 ℃ time centre wavelength be 1540.036nm), it is naked grating that grating becomes gate part, and the no any protective layer in surface carries out surface metalation with it, and electrogalvanizing, thickness are 30
Fiber grating after the metallization is penetrated metal capillary, make the grating position be positioned at the centre position of metal capillary, with the electro-insulating rubber pad in the stria of metal installing plate, the metal tube mounting plates structure is shown in Fig. 3,4,5, the metal capillary level is placed in the stria of metal tube installing plate, installed and fixed metal capillary, non-conductive between capillary and the metal installing plate; Grating metalized portion tie point welding machine negative pole, regulating displacement is the prestressing force of 46.134MPa size to 0.2mm(), make fiber grating be subjected to prestressing force, regulating the bipolar electrode spacing is 39mm, the spot welding parameter is set: welding current 50A, weld interval 0.1s, electrode pressure 1500N, the spot welding encapsulation is carried out at the capillary two ends, as shown in Figure 1, be coated with the coat of metal 4 on the optical fiber 1, there is optical fiber 1 periphery of the coat of metal 4 to be provided with metal capillary 2, the both upper ends thereof of metal capillary 2 is respectively equipped with electrode 6, the equal tie point welding machine of the one end main control system 5 of electrode 6 and the coat of metal 4, mash welder main control system 5 control electrodes 6 utilize after the energising between the coat of metal 4 of 6 pairs of metal capillaries 2 of electrode and optical fiber surface and encapsulate spot welding, obtain the Fiber Bragg Grating FBG of metal capillary 2 encapsulation then;
Fiber grating after the encapsulation is carried out the TEMP attribute testing, and centre wavelength is that the naked grating of 1540.036nm compares test during with 25 ℃, and centre wavelength varies with temperature curve such as Fig. 6, centre wavelength Detection of Stability result such as Fig. 7.The result shows that the temperature control coefficient is 48.75pm/ ℃, is about 5.02 times of naked grating; Reach 100 hours, centre wavelength fluctuates in 1540.284 ~ 1540.302nm, and the fluctuation maximum is 0.018nm, illustrates that centre wavelength has good stability.
Example two: choosing internal diameter is 0.5mm, and external diameter is 0.9mm, and length is the capillary zinc pipe of 60mm, and thickness is 0.6mm, and length is the electro-insulating rubber of 60mm;
The concrete operations step: get a fiber grating (22.5 ℃ time centre wavelength be 1540.012nm), it is naked grating that grating becomes gate part, and the no any protective layer in surface carries out surface metalation with it, and electrogalvanizing, thickness are 40
Fiber grating after the metallization is penetrated metal capillary, make the grating position be positioned at the centre position of metal capillary, with the electro-insulating rubber pad at metal tube mounting plates structure in the stria of metal installing plate shown in Fig. 3,4,5, the metal capillary level is placed in the stria of metal tube installing plate, installed and fixed metal capillary, non-conductive between capillary and the metal installing plate; Grating metalized portion tie point welding machine negative pole, regulating displacement is the prestressing force of 46.134MPa size to 0.2mm(), make fiber grating be subjected to prestressing force, regulating the bipolar electrode spacing is 49mm, the spot welding parameter is set: welding current 50A, weld interval 0.1s, electrode pressure 1500N, the spot welding encapsulation is carried out at the capillary two ends, as shown in Figure 1.
Fiber grating after the encapsulation is carried out the TEMP attribute testing, and centre wavelength is that the naked grating of 1540.036nm compares test during with 25 ℃, and centre wavelength varies with temperature curve such as Fig. 8, centre wavelength Detection of Stability result such as Fig. 9.The result shows that the temperature control coefficient is 49.02pm/ ℃, is about 5.05 times of naked grating; Reach 100 hours, centre wavelength fluctuates in 1540.281 ~ 1540.301nm, and the fluctuation maximum is 0.020nm, illustrates that centre wavelength has good stability.
Example three: choosing internal diameter is 0.8mm, and external diameter is the capillary zinc pipe of 60mm for 1.2mm length, and thickness is 0.4mm, and length is the electro-insulating rubber of 60mm;
The concrete operations step: get a fiber grating (22.4 ℃ time centre wavelength be 1540.008nm), it is naked grating that grating becomes gate part, and the no any protective layer in surface carries out surface metalation with it, and electrogalvanizing, thickness are 50
Fiber grating after the metallization is penetrated metal capillary, make the grating position be positioned at the centre position of metal capillary, with the electro-insulating rubber pad at metal tube mounting plates structure in the stria of metal installing plate shown in Fig. 3,4,5, the metal capillary level is placed in the stria of metal tube installing plate, installed and fixed metal capillary, non-conductive between capillary and the metal installing plate; Grating metalized portion tie point welding machine negative pole, regulating displacement is the prestressing force of 46.134MPa size to 0.2mm(), make fiber grating be subjected to prestressing force, regulating the bipolar electrode spacing is 59mm, the spot welding parameter is set: welding current 50A, weld interval 0.1s, electrode pressure 1500N, the spot welding encapsulation is carried out at the capillary two ends, as shown in Figure 1.
Fiber grating after the encapsulation is carried out the TEMP attribute testing, and centre wavelength is that the naked grating of 1540.036nm compares test during with 25 ℃, and centre wavelength varies with temperature curve such as Figure 10, centre wavelength Detection of Stability result such as Figure 11.The result shows that the temperature control coefficient is 47.7pm/ ℃, is about 4.92 times of naked grating; Reach 100 hours, centre wavelength fluctuates in 1540.288 ~ 1540.301nm, and the fluctuation maximum is 0.013nm, illustrates that centre wavelength has good stability.
Claims (4)
1. one kind applies prestressed capillary type spot welding packaging technology to fiber grating, it is characterized in that described packaging technology may further comprise the steps:
(1) get a fiber grating, it is naked grating that grating becomes gate part, and the no any protective layer in surface carries out surface metalation with it, and metallization thickness is 30 ~ 50
(2) the grating position of the fiber grating after will the metallizing metal capillary of packing into, the metal capillary level is placed in the stria of metal tube installing plate, is lined with one deck electro-insulating rubber between capillary and the metal tube installing plate, has installed and fixed metal capillary;
(3) grating metalized portion tie point welding machine negative pole is regulated displacement, and fiber grating is applied prestressing force, utilizes improvement hand-held bipolar electrode portable point welding machine that the spot welding encapsulation is carried out at the capillary two ends.
2. as claimed in claim 1ly a kind of fiber grating is applied prestressed capillary type spot welding packaging technology, it is characterized in that described metal capillary material is that purity is 99.99% zinc, capillary zinc pipe internal diameter is more than or equal to 0.3mm, external diameter is less than or equal to 1.2mm, pipe thickness 0.2mm, length 40 ~ 60mm.
3. as claimed in claim 1ly a kind of fiber grating is applied prestressed capillary type spot welding packaging technology, it is characterized in that described metal tube installing plate thickness is 5.0 ~ 8.0mm, length and width are 80mm; Milling a groove on the metal tube installing plate upper surface symmetrical center line, width 3.0mm, degree of depth 2.0mm, length 80mm; Pad one deck electro-insulating rubber lining plays the effect of isolated metal tube and metal tube installing plate conduction in the groove, and its thickness is determined jointly by stria size and metal tube size.
4. as claimed in claim 1ly a kind of fiber grating is applied prestressed capillary type spot welding packaging technology, the adjustable range that it is characterized in that described bipolar electrode portable point welding machine two electrode spacings is 0 ~ 80mm, electrode length 30mm, diameter 1.4mm, end diameter 1.0mm.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104279974A (en) * | 2014-09-28 | 2015-01-14 | 中国船舶重工集团公司第七一九研究所 | Split type optic fiber strain sensor assembly |
| CN110319958A (en) * | 2019-07-23 | 2019-10-11 | 桂林理工大学 | The preparation and application of fiber bragg grating sensing device and the pressure rings using it |
| CN111715988A (en) * | 2020-05-21 | 2020-09-29 | 定州之源汽车零部件制造有限公司 | Welding process and welding assembly for engine mounting cross beam welding assembly |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0256348A1 (en) * | 1986-07-24 | 1988-02-24 | Alcatel Cit | Mechanical switch for optical fibers |
| EP1115016A1 (en) * | 1999-11-10 | 2001-07-11 | JDS Uniphase Corporation | Supporting structure for optical fiber fixing and submicron fine alignment |
| CN1334929A (en) * | 1998-12-04 | 2002-02-06 | 塞德拉公司 | Tube-encased fibre grating |
| CN2575612Y (en) * | 2002-10-31 | 2003-09-24 | 南开大学 | Liquid crystal type liquid level analog display |
| CN2752792Y (en) * | 2004-12-17 | 2006-01-18 | 武汉理工大学 | Optical fibre sensitive element metal packaging structure |
| JP2006194704A (en) * | 2005-01-12 | 2006-07-27 | Kyowa Electron Instr Co Ltd | Welded optical strain gage, its manufacturing method, and welded optical strain gage unit |
| CN2824328Y (en) * | 2005-08-02 | 2006-10-04 | 中国科学院紫金山天文台 | Electric connector for carbon fibre anode filament |
| CN102297706A (en) * | 2011-05-24 | 2011-12-28 | 黄堃 | Fiber bragg grating sensor with metal packaging and manufacturing method thereof |
| CN102962538A (en) * | 2012-11-08 | 2013-03-13 | 南昌大学 | Braze welding packaging and manufacturing method for making fiber bragg grating into double-peak grating |
| CN202804465U (en) * | 2012-08-29 | 2013-03-20 | 上海沿浦金属制品股份有限公司 | Automatic pressure balancing structure for resistance welding of double electrode tips |
-
2013
- 2013-06-17 CN CN2013102388619A patent/CN103273183A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0256348A1 (en) * | 1986-07-24 | 1988-02-24 | Alcatel Cit | Mechanical switch for optical fibers |
| CN1334929A (en) * | 1998-12-04 | 2002-02-06 | 塞德拉公司 | Tube-encased fibre grating |
| EP1115016A1 (en) * | 1999-11-10 | 2001-07-11 | JDS Uniphase Corporation | Supporting structure for optical fiber fixing and submicron fine alignment |
| CN2575612Y (en) * | 2002-10-31 | 2003-09-24 | 南开大学 | Liquid crystal type liquid level analog display |
| CN2752792Y (en) * | 2004-12-17 | 2006-01-18 | 武汉理工大学 | Optical fibre sensitive element metal packaging structure |
| JP2006194704A (en) * | 2005-01-12 | 2006-07-27 | Kyowa Electron Instr Co Ltd | Welded optical strain gage, its manufacturing method, and welded optical strain gage unit |
| CN2824328Y (en) * | 2005-08-02 | 2006-10-04 | 中国科学院紫金山天文台 | Electric connector for carbon fibre anode filament |
| CN102297706A (en) * | 2011-05-24 | 2011-12-28 | 黄堃 | Fiber bragg grating sensor with metal packaging and manufacturing method thereof |
| CN202804465U (en) * | 2012-08-29 | 2013-03-20 | 上海沿浦金属制品股份有限公司 | Automatic pressure balancing structure for resistance welding of double electrode tips |
| CN102962538A (en) * | 2012-11-08 | 2013-03-13 | 南昌大学 | Braze welding packaging and manufacturing method for making fiber bragg grating into double-peak grating |
Non-Patent Citations (1)
| Title |
|---|
| 杨亦飞: "工程化光纤光栅传感系统的设计与应用研究", 《万方学位论文数据库》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104279974A (en) * | 2014-09-28 | 2015-01-14 | 中国船舶重工集团公司第七一九研究所 | Split type optic fiber strain sensor assembly |
| CN110319958A (en) * | 2019-07-23 | 2019-10-11 | 桂林理工大学 | The preparation and application of fiber bragg grating sensing device and the pressure rings using it |
| CN111715988A (en) * | 2020-05-21 | 2020-09-29 | 定州之源汽车零部件制造有限公司 | Welding process and welding assembly for engine mounting cross beam welding assembly |
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Application publication date: 20130904 |