CN210180464U - Fiber grating packaging device - Google Patents
Fiber grating packaging device Download PDFInfo
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- CN210180464U CN210180464U CN201921321462.8U CN201921321462U CN210180464U CN 210180464 U CN210180464 U CN 210180464U CN 201921321462 U CN201921321462 U CN 201921321462U CN 210180464 U CN210180464 U CN 210180464U
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Abstract
A fiber grating packaging device comprises a packaging instrument and a controller, wherein the packaging instrument is connected with the controller through a lead; the packaging instrument comprises an adjustable packaging workbench, a three-dimensional adjusting frame, a first optical fiber fixing clamp, a second optical fiber fixing clamp, a stress applying instrument, a heating top cover, a sealing block, an air hose, a vacuum valve, a bottom plate, a pair of vertical plates and a top plate; be equipped with U type groove on the encapsulation workstation with adjustable, the bottom in U type groove is equipped with 8 at least apertures, the aperture passes through sealed piece and air hose and links to each other with the vacuum valve, the encapsulation pipe in the fixed U type inslot of mode through air adsorption, the below of encapsulation workstation with adjustable sets up three-dimensional alignment jig, three-dimensional alignment jig is arranged in by a pair of riser, in the cavity that roof and bottom plate constitute, an optic fibre mounting fixture and No. two optic fibre mounting fixtures set up in the both sides of encapsulation workstation with adjustable, fix on the roof surface through the screw, the appearance is applyed to No. two optic fibre mounting fixture institute department's one side fixed stress on the roof, the heating top cap passes through the metal rotating shaft and links to.
Description
Technical Field
The utility model belongs to the technical field of the fiber grating sensing, concretely relates to fiber grating packaging hardware.
Background
The optical fiber sensor is a novel sensor, and compared with the traditional sensor, the optical fiber sensor has the advantages of high temperature resistance, corrosion resistance, electromagnetic interference resistance, small size, flexibility, convenience and the like. The fiber grating sensor has the advantages of a common fiber sensor, and also has the characteristic of wavelength coding, so that the anti-interference capability of the fiber grating is enhanced, networking and multiplexing are easy, and the fiber grating sensor is an ideal substitute of a traditional sensor. However, the fiber bragg grating is very fragile and easy to break, and the fiber bragg grating directly used as a sensor encounters a great difficulty of a layout process in practical engineering application. Therefore, it is very significant to research a practical fiber grating packaging process for the problems to be solved.
Because the fiber grating sensor has the problem of cross sensitivity, namely, temperature and strain both affect the wavelength of the fiber grating, the strain and the temperature are difficult to be effectively distinguished when the coupling wavelength of the fiber grating is moved. Therefore, the adverse effect caused by good cross sensitivity is a very important prerequisite for improving the precision of the fiber grating sensor.
The double-layer metal sleeve type packaging structure is a feasible scheme for reducing the cross sensitivity effect. The outer layer of packaging tube is not in direct contact with the inner layer of packaging tube, so that the sensor is not influenced by external force while accurately measuring the temperature.
In addition, in the field of high-temperature-resistant fiber grating sensor packaging, a double-layer tube type packaging structure is also required. When designing a package structure of a high-temperature-resistant fiber grating sensor, the following three aspects need to be considered: firstly, the packaging material has stable property under the high-temperature condition, and the high-temperature resistance of the packaging material is matched with the optical fiber as much as possible; secondly, whether the packaging structure can reliably protect the fiber bragg grating or not; and finally, the sensing performance of the packaged fiber grating sensor is similar.
Therefore, in the process of researching the high-temperature resistant fiber grating packaging technology, some groups manufacture the quartz-metal double-layer packaged high-temperature fiber grating sensor.
The double-layer tubular packaging structure has great potential in promoting the practical engineering application of the fiber bragg grating, but the packaging process has high difficulty, and the fiber bragg grating and two layers of sleeves need to be ensured to be coaxial in space. At present, when the double-layer tubular structure is adopted to package the fiber bragg grating, several people are often needed to perform manual operation at the same time, so that the size and the specification of the packaged fiber bragg grating sensor are not uniform, and the sensitivity difference is large. The aim of recycling is difficult to achieve, and the unified standard of sensitivity is difficult to establish. A practical packaging device and an operation method for carrying out double-layer tubular packaging on the fiber bragg grating are not provided.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that overcome prior art not enough, provide a fiber grating packaging hardware, can exert invariable prestressing force to fiber grating before the encapsulation to carry out standard and normative tubular encapsulation to fiber grating, realize the accurate control to fiber grating tubular packaging structure performance.
The utility model provides a fiber grating packaging device, which comprises a packaging instrument and a controller, wherein the packaging instrument is connected with the controller through a wire;
the packaging instrument comprises an adjustable packaging workbench (11), a three-dimensional adjusting frame (13), a first optical fiber fixing clamp (8), a second optical fiber fixing clamp (9), a stress applying instrument (10), a heating top cover (12), a sealing block (14), a vacuum valve (15), an air hose (16), a bottom plate (1), a first vertical plate (2), a second vertical plate (3) and a top plate (4); the adjustable packaging worktable (11) is provided with a U-shaped groove, the bottom of the U-shaped groove is provided with 8 small holes, the small holes are connected with a vacuum valve (15) through a sealing block (14) and an air hose (16), a packaging pipe in the U-shaped groove is fixed in an air adsorption mode, a three-dimensional adjusting frame (13) is arranged below the adjustable packaging workbench (11), the three-dimensional adjusting frame (13) is arranged in a cavity formed by the bottom plate (1), the first vertical plate (2), the second vertical plate (3) and the top plate (4), the first optical fiber fixing clamp (8) and the second optical fiber fixing clamp (9) are arranged at two sides of the adjustable packaging workbench (11), the device is fixed on the surface of a top plate through screws, a stress applying instrument (10) is fixed on the edge of one side where a second optical fiber fixing clamp (9) is located, and a heating top cover (12) is connected with an adjustable packaging workbench (11) through a metal rotating shaft.
As a further technical proposal of the utility model, the controller comprises a temperature control unit, a stress control unit, a suction control unit and a central processing unit; the receiving ends of the temperature control unit, the stress control unit and the suction control unit are all connected with the control end of the central processing unit;
the temperature control unit is used for controlling the size and the duration of the heating temperature of the heating top cover;
the stress control unit is used for controlling the magnitude of the axial stress applied by the stress applying instrument;
and the suction control unit is used for controlling the suction force of the vacuum valve.
Furthermore, the three-dimensional adjusting frame (13) comprises an X-direction distance adjusting micro-dividing head (5), a Y-direction distance adjusting micro-dividing head (6) and a Z-direction distance adjusting micro-dividing head (7), a connecting rod of the Z-direction distance adjusting micro-dividing head (7) is connected with the adjustable packaging workbench (11), and the distance adjusting precision of the X-direction distance adjusting micro-dividing head (5), the Y-direction distance adjusting micro-dividing head (6) and the Z-direction distance adjusting micro-dividing head (7) is 0.005 mm.
Furthermore, a plurality of V-shaped grooves are formed in the first optical fiber fixing clamp (8) and the second optical fiber fixing clamp (9).
Furthermore, the heating top cover comprises a heating top cover body (12-1), a heating resistance wire (12-3) and a temperature sensor (12-2), the temperature sensor (12-2) is installed on the inner surface of the heating top cover body (12-1), the heating resistance wire (12-3) is arranged along the boundary of the temperature sensor (12-2), and the heating top cover (12) is connected with the adjustable packaging workbench (11) through a metal rotating shaft.
The utility model can control the two layers but not limited to the two layers of packaging tubes to be coaxial in space and not to contact with each other by adjusting the three-dimensional adjusting frame; the prestress applying device is arranged, so that the reliability of the packaging effect can be further improved; an air adsorption device is arranged in a U-shaped groove of the adjustable packaging workbench, so that a packaging tube, particularly a small-sized packaging tube, can be effectively fixed. The tubular fiber grating sensor packaged by the device has relatively uniform size and appearance, so that the tubular packaging of the fiber grating is more standard and standard; the manufactured sensor and the object to be measured are mutually independent, and the sensor is recycled; the sensor can be used after being calibrated, the use precision is improved, and the performance of the packaged sensor can be effectively controlled.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a front view of the structure of the present invention;
fig. 3 is a schematic structural diagram of the air adsorption module of the present invention;
fig. 4 is a top view of the present invention;
FIG. 5 is a block diagram of the controller of the present invention
In the figure, a bottom plate 1, a first vertical plate 2, a second vertical plate 3, a top plate 4, a 5X-direction distance-adjusting differential head, a 6Y-direction distance-adjusting differential head, a 7Z-direction distance-adjusting differential head, a first optical fiber fixing clamp 8, a second optical fiber fixing clamp 9, a stress applying instrument 10, an adjustable packaging workbench 11, a heating top cover 12, a heating top cover body 12.1, a temperature sensor 12.2, a heating resistance wire 12.3, a three-dimensional adjusting frame 13 and a sealing block 14 are arranged on the bottom plate. 15 vacuum valve, 16 air hose.
Detailed Description
Referring to fig. 1 to 5, the present embodiment provides a fiber grating package device, specifically, the package device includes a package instrument and a controller, and the package instrument and the controller are connected by a wire.
The packaging instrument comprises an adjustable packaging workbench 11, a three-dimensional adjusting frame 13, a first optical fiber fixing clamp 8, a second optical fiber fixing clamp 9, a stress applying instrument 10, a heating top cover 12, a sealing block 14, an air hose 16, a vacuum valve 15, a bottom plate 1, two vertical plates and a top plate 4. The adjustable packaging workbench 11 is provided with a U-shaped groove, the bottom of the U-shaped groove is provided with 8 but not limited to 8 small holes, the small holes are connected with a vacuum valve 15 through a sealing block 14 and an air hose 16, and a packaging pipe placed in the U-shaped groove is fixed in an air adsorption mode; the three-dimensional adjusting frame is arranged below the adjustable packaging workbench 11 and is used for adjusting the position of a packaging tube fixed by the adjustable packaging workbench 11; the first optical fiber fixing clamp 8 and the second optical fiber fixing clamp 9 are respectively arranged on two sides of the adjustable packaging workbench 11 and are connected with the top plate 4 through screws; the stress applying instrument 10 is arranged on the outer side of the second optical fiber fixing clamp 9, is connected with the top plate 4 through screws and is used for applying constant prestress to the optical fiber grating during packaging; the heating top cover 12 is connected with the adjustable packaging workbench 11 through a metal rotating shaft, and can cover the adjustable packaging workbench 11 and heat and cure the fiber bragg grating preliminarily packaged by using curing glue.
The controller comprises a temperature control unit, a stress control unit, a suction control unit and a central processing unit. The temperature control unit is used for controlling the heating temperature and the heating duration of the heating top cover, the stress control unit is used for controlling the axial stress applied by the stress applying instrument, and the suction control unit is used for controlling the suction of the vacuum valve. The temperature control unit, the stress control unit and the suction control unit are all connected with the central processing unit and are controlled by the central processing unit in a unified way;
as an embodiment, the packaging device for fiber bragg grating is used for packaging a double-layer stainless steel tube, and comprises the following steps:
s1, as an embodiment, the fiber grating has a diameter of 250 μm and a grating region length of 20 mm. Opening covers of a first optical fiber fixing clamp 8 and a second optical fiber fixing clamp 9 and a heating top cover 12, and respectively adjusting an X-direction distance-adjusting differential head 5, a Y-direction distance-adjusting differential head 6 and a Z-direction distance-adjusting differential head 7 on a three-dimensional adjusting frame to enable the axes of a U-shaped groove formed in an adjustable packaging workbench 11 to be consistent with the axes of a V-shaped groove for fixing 250 mu m diameter optical fibers on the first optical fiber fixing clamp and the second optical fiber fixing clamp;
s2, as an embodiment, the inner-layer packaging tube is a 304 stainless steel tube with the diameter of 0.6mm, the wall thickness of the tube of 0.1mm and the length of 30 mm. The fiber grating penetrates through the inner-layer packaging tube, so that a grating area of the fiber grating is positioned in the middle of the packaging tube, the packaging tube is placed in a U-shaped groove formed in an adjustable packaging workbench 11, and optical fibers on two sides of the packaging tube are freely and horizontally placed in two 250 mu mV-shaped grooves of an optical fiber fixing clamp;
s3, tightly covering the cover of the first optical fiber fixing clamp 8, freely placing the right end of the optical fiber in the stress applying instrument 10, applying constant prestress to the fiber bragg grating, setting the prestress to be 1N as an embodiment, and tightly covering the cover of the second optical fiber fixing clamp 9;
s4, adjusting the X-direction distance-adjusting differential head 5, the Y-direction distance-adjusting differential head 6 and the Z-direction distance-adjusting differential head 7 on the three-dimensional adjusting frame again to enable the packaging tube and the fiber bragg grating to keep coaxial space, opening a switch of a vacuum valve 15, and ensuring the position of the packaging tube to be fixed through the action of air adsorption;
s5, injecting high-temperature-resistant silica gel to two ends of the packaging tube by using a needle tube, closing the heating top cover 12, setting the temperature to be 60 ℃ as an embodiment, keeping the temperature for four hours, and heating and curing the high-temperature silica gel;
and S6, after the solidification is finished, penetrating the packaging structure into the outer layer metal sleeve. As an embodiment, the outer sleeve is a 304 stainless steel tube with the diameter of 1.4 mm, the wall thickness of the tube of 0.1mm and the length of 40 mm, axial prestress is not applied to the fiber bragg grating, and the operation is repeated;
and S7, taking out the packaged fiber grating sensor by using a tool after the final packaging is finished.
The patent has many embodiments, and all technical solutions formed by using equivalent transformation or equivalent transformation fall within the protection scope of the patent.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration only, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the claims and their equivalents.
Claims (5)
1. The fiber bragg grating packaging device is characterized by comprising a packaging instrument and a controller, wherein the packaging instrument is connected with the controller through a lead;
the packaging instrument comprises an adjustable packaging workbench (11), a three-dimensional adjusting frame (13), a first optical fiber fixing clamp (8), a second optical fiber fixing clamp (9), a stress applying instrument (10), a heating top cover (12), a sealing block (14), a vacuum valve (15), an air hose (16), a bottom plate (1), a first vertical plate (2), a second vertical plate (3) and a top plate (4); the adjustable packaging workbench (11) is provided with a U-shaped groove, the bottom of the U-shaped groove is provided with 8 small holes, the small holes are connected with the vacuum valve (15) through the sealing block (14) and the air hose (16), the packaging pipe in the U-shaped groove is fixed in an air adsorption mode, the three-dimensional adjusting frame (13) is arranged below the adjustable packaging workbench (11), the three-dimensional adjusting frame (13) is arranged in a cavity formed by the bottom plate (1), the first vertical plate (2), the second vertical plate (3) and the top plate (4), the first optical fiber fixing clamp (8) and the second optical fiber fixing clamp (9) are arranged on two sides of the adjustable packaging workbench (11) and fixed on the surface of the top plate through screws, the stress applying instrument (10) is fixed on the edge of one side where the second optical fiber fixing clamp (9) is located, the heating top cover (12) is connected with the adjustable packaging workbench (11) through a metal rotating shaft.
2. The fiber grating packaging apparatus of claim 1, wherein the controller comprises a temperature control unit, a stress control unit, a suction control unit and a central processing unit; the receiving ends of the temperature control unit, the stress control unit and the suction control unit are all connected with the control end of the central processing unit;
the temperature control unit is used for controlling the heating temperature and the heating time of the heating top cover;
the stress control unit is used for controlling the magnitude of the axial stress applied by the stress applying instrument;
and the suction control unit is used for controlling the size of the suction force of the vacuum valve.
3. The fiber grating packaging device according to claim 1, wherein the three-dimensional adjusting frame (13) comprises an X-direction fine-pitch-adjusting head (5), a Y-direction fine-pitch-adjusting head (6) and a Z-direction fine-pitch-adjusting head (7), a connecting rod of the Z-direction fine-pitch-adjusting head (7) is connected with the adjustable packaging worktable (11), and the fine-pitch-adjusting heads (5) in the X direction, the Y-direction fine-pitch-adjusting head (6) and the Z-direction fine-pitch-adjusting head (7) have a pitch-adjusting precision of 0.005 mm.
4. The fiber grating packaging device according to claim 1, wherein a plurality of V-grooves are formed on each of the first fiber fixing clamp (8) and the second fiber fixing clamp (9).
5. The fiber grating packaging device according to claim 1, wherein the heating top cover comprises a heating top cover body (12-1), a heating resistance wire (12-3) and a temperature sensor (12-2), the temperature sensor (12-2) is mounted on the inner surface of the heating top cover body (12-1), the heating resistance wire (12-3) is arranged along the boundary of the temperature sensor (12-2), and the heating top cover (12) is connected with the adjustable packaging worktable (11) through a metal rotating shaft.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921321462.8U CN210180464U (en) | 2019-08-15 | 2019-08-15 | Fiber grating packaging device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921321462.8U CN210180464U (en) | 2019-08-15 | 2019-08-15 | Fiber grating packaging device |
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| CN210180464U true CN210180464U (en) | 2020-03-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111006700A (en) * | 2019-08-15 | 2020-04-14 | 南京邮电大学 | Fiber grating packaging device and packaging method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111006700A (en) * | 2019-08-15 | 2020-04-14 | 南京邮电大学 | Fiber grating packaging device and packaging method |
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