Micro-nano optical fiber packaging structure

Abstract

The invention relates to a micro-nano optical fiber packaging structure, which comprises a base; the first supporting beam is fixed on the base; the second supporting beam is arranged on the base, and the second supporting beam can slide in the direction close to or away from the first supporting beam; the first supporting beam and the second supporting beam are both provided with first strip-shaped grooves used for installing the micro-nanofiber, and the two first strip-shaped grooves are located in the same straight line. And a first gap is formed between the first supporting beam and the second supporting beam. According to the invention, the direct contact between the micro-nano optical fiber and the to-be-measured substance is realized, the deformation of the micro-nano optical fiber under the action of fluid and heat is reduced, and the stability and reliability of the micro-nano optical fiber in a complex environment are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of optical fiber packaging, and in particular to a micro-nano optical fiber packaging structure. Background Art

[0002] With the development of power systems, transformers, as key equipment for power transmission and distribution, are receiving increasing attention for their operating status monitoring. Dissolved gas in transformer oil is one of the important parameters for evaluating the insulation status of transformers. Micro-nano optical fiber sensors have shown great potential in the field of dissolved gas detection in transformer oil due to their high sensitivity, low loss, and ease of mass production. However, due to their extremely fine diameter (usually in the micrometer range), micro-nano optical fibers are prone to breakage when faced with complex environments such as oil flow scouring, vibration, and temperature changes in transformer oil, which limits their stability and reliability in practical applications.

[0003] In the prior art, the packaging methods for micro-nano optical fibers include using capillaries, flexible films and U-shaped tubes for packaging, such as the Chinese invention patent disclosed as CN110441865A, which discloses a reflector packaging technology field, in which gel is injected into the through groove (U-shaped) to form a second gel layer, so that the second gel layer encapsulates part of the coated optical fiber in the through groove. However, the micro-nano optical fiber encapsulated by capillaries and films cannot directly contact the substance to be tested, and the packaging is difficult. For the micro-nano optical fiber encapsulated by the U-shaped tube, although it can contact the substance to be tested, dead oil areas are prone to occur. Summary of the invention

[0004] In order to solve the technical problems existing in the above-mentioned prior art, the purpose of the present invention is to provide a micro-nano optical fiber packaging structure, which realizes direct contact between the micro-nano optical fiber and the substance to be measured, reduces the deformation of the micro-nano optical fiber under the action of fluid and heat, and improves the stability and reliability of the micro-nano optical fiber in complex environments.

[0005] In order to achieve the above-mentioned object of the invention, the present invention provides a micro-nano optical fiber packaging structure, comprising:

[0006] Base;

[0007] a first support beam fixed to the base;

[0008] A second support beam disposed on the base, the second support beam being slidable in a direction approaching or moving away from the first support beam;

[0009] The first support beam and the second support beam are both provided with a first strip groove for installing the micro-nano optical fiber, and the two first strip grooves are on the same straight line;

[0010] A first gap is provided between the first supporting beam and the second supporting beam.

[0011] According to a technical solution of the present invention, a guide hole is provided on the first support beam, and a guide rod adapted to the guide hole is provided on the second support beam;

[0012] The guide rod extends into the guide hole.

[0013] According to a technical solution of the present invention, there is a gap between the guide rod and the guide hole.

[0014] According to a technical solution of the present invention, the first support beam and the second support beam are both provided with a plurality of second strip grooves parallel to the first strip grooves for installing compensating optical fibers.

[0015] According to a technical solution of the present invention, the second support beam is provided with a slide rail, and the slide rail is adapted to the slide groove on the bottom plate.

[0016] According to a technical solution of the present invention, the slide rail and the slide groove are both in an inverted "T" shape.

[0017] According to a technical solution of the present invention, the slide rail and the second support beam are an integrated structure.

[0018] According to a technical solution of the present invention, the micro-nano optical fiber and the compensation optical fiber are fixed to the first support beam and / or the second support beam by ultraviolet glue fixation or clamp pressing fixation;

[0019] The base plate and the first support beam are connected by bolts or glue.

[0020] According to a technical solution of the present invention, the length L1 of the probe lumbar region of the micro-nano optical fiber and the length L2 of the first gap satisfy the following relationship:

[0021] 1≤L2 / L1≤5.

[0022] According to a technical solution of the present invention, the length L1 of the probe lumbar region of the micro-nano optical fiber and the movable distance L3 of the second support beam on the base satisfy the following relationship:

[0023] 0.1≤L3 / L1≤2.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The present invention proposes a micro-nano optical fiber packaging structure, which realizes direct contact between the micro-nano optical fiber and the substance to be tested, and can effectively prevent the micro-nano optical fiber from breaking due to oil flow impact in complex environments such as transformer oil. At the same time, through an ingenious temperature compensation mechanism, the micro-nano optical fiber is prevented from being deformed due to excessive thermal stress, thereby significantly improving the stability and reliability of the micro-nano optical fiber in practical applications, ensuring that it can work stably and efficiently in fields such as dissolved gas detection in transformer oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 A schematic diagram schematically showing a micro-nano optical fiber packaging structure in one embodiment of the present invention;

[0028] Figure 2 A schematic diagram schematically showing a micro-nano optical fiber packaging structure in another embodiment of the present invention;

[0029] Figure 3 An exploded view schematically showing a micro-nano optical fiber packaging structure in one embodiment of the present invention;

[0030] Figure 4 An exploded view schematically showing a micro-nano optical fiber packaging structure in another embodiment of the present invention;

[0031] Figure 5 A schematic diagram of the micro-nano optical fiber structure in one embodiment of the present invention is shown;

[0032] Figure 6 Schematically showing the deformation of an unpackaged micro-nano optical fiber in one embodiment of the present invention;

[0033] Figure 7 Schematically showing the deformation of the optical fiber fixedly supported by the packaging structure in one embodiment of the present invention;

[0034] Figure 8 Schematically represents the deformation amount of the non-compensated optical fiber in one embodiment of the present invention;

[0035] Fig. 9 The figure schematically shows the deformation of the compensating optical fiber in one embodiment of the present invention.

[0036] Reference numerals:

[0037] 1. Base; 2. First support beam; 3. Second support beam; 4. First strip groove; 5. First gap; 6. Second strip groove;

[0038] 11. Slide groove; 21. Guide hole; 31. Guide rod; 32. Slide rail. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] like Figures 1 to 5 As shown, the present invention provides a micro-nano optical fiber packaging structure, comprising: a base 1, a first support beam 2 fixed on the base 1, and a second support beam 3 arranged on the base 1. The base 1 serves as the basic support of the entire structure, carrying the first support beam 2 and the second support beam 3, and providing a stable installation platform for the micro-nano optical fiber packaging structure.

[0041] The first support beam 2 and the second support beam 3 are both provided with a first strip groove 4 for installing the micro-nano optical fiber, and the two first strip grooves 4 are on the same straight line. The size of the first strip groove 4 is adapted to the micro-nano optical fiber and can fix the two ends of the micro-nano optical fiber to prevent the optical fiber from being displaced during the detection process.

[0042] A first gap 5 is provided between the first support beam 2 and the second support beam 3 .

[0043] The second support beam 3 can slide in a direction approaching or away from the first support beam 2. When the micro-nano optical fiber is heated and expands, the axially stretched optical fiber will generate a force on the second support beam 3, causing it to slide on the base 1 in a direction approaching or away from the first support beam 2, thereby achieving adaptive adjustment to the thermal expansion of the optical fiber, avoiding damage to the optical fiber due to the concentration of axial tensile stress generated by the thermal expansion of the optical fiber, and solving the problem that the micro-nano optical fiber is susceptible to oil flow impact fracture and thermal stress deformation in complex environments such as transformer oil, ensuring the structural integrity and normal working state of the micro-nano optical fiber under different temperature conditions, and helping to maintain the stable optical transmission performance of the micro-nano optical fiber.

[0044] By setting the first gap 5, on the one hand, necessary space is provided for the sliding of the second support beam 3, and on the other hand, installation space is provided for the lumbar region of the micro-nano optical fiber probe.

[0045] The material of the bottom plate may be quartz glass, polyetheretherketone, etc. Preferably, the bottom plate material is quartz glass, which has a better thermal expansion coefficient match with the micro-nano optical fiber.

[0046] In some embodiments of the present invention, a guide hole 21 is provided on the first support beam 2, and a guide rod 31 adapted to the guide hole 21 is provided on the second support beam 3;

[0047] The guide rod 31 extends into the guide hole 21 .

[0048] When the optical fiber expands and stretches due to heat, the second support beam 3 is subjected to the tension of the optical fiber, and the inner wall of the guide hole 21 limits the movement direction of the guide rod 31, reducing the left and right or up and down deviation of the second support beam 3 during movement, and providing precise guiding effect for the sliding of the second support beam 3, so that the second support beam 3 can move along a predetermined straight line direction when it moves due to thermal expansion of the optical fiber, avoiding uneven force on the optical fiber due to lateral deviation, ensuring that the force direction of the optical fiber is always along the axial direction during the thermal expansion and stretching process, reducing the adverse effects such as bending and torsion caused by lateral force, ensuring the stable transmission performance of the micro-nano optical fiber, and at the same time ensuring the reliability and accuracy of the entire packaging structure, which is beneficial to the performance of the micro-nano optical fiber in precise measurement and detection applications.

[0049] In some embodiments of the present invention, the gap design between the guide rod 31 and the guide hole 21 enables the second support beam 3 to have better flexibility and fault tolerance when it moves due to thermal expansion of the optical fiber. On the one hand, in the case of manufacturing errors, temperature changes, etc., the gap can prevent the jamming phenomenon between the guide rod 31 and the guide hole 21, ensure that the second support beam 3 can slide smoothly, and the thermal expansion of the micro-nano optical fiber can be smoothly converted into the movement of the second support beam 3; on the other hand, the gap can buffer the tiny vibrations or additional lateral forces caused by the uneven stretching of the micro-nano optical fiber to a certain extent, avoid these factors from causing damage to the micro-nano optical fiber and the entire packaging structure, extend the service life of the structure, and ensure the stability of the micro-nano optical fiber under multiple thermal expansion and contraction cycles.

[0050] In some embodiments of the present invention, the first support beam 2 and the second support beam 3 are both provided with a plurality of second strip grooves 6 parallel to the first strip grooves 4 for installing compensation optical fibers. The plurality of second strip grooves 6 are arranged on both sides of the first strip grooves 4. The thermal expansion coefficient and thermal conductivity of the compensation optical fiber are exactly the same as those of the micro-nano optical fiber. When the optical fiber is subjected to thermal stress, the compensation optical fiber can effectively balance the temperature stress and reduce the influence of external environmental factors on the micro-nano optical fiber sensing probe.

[0051] The number of the second strip grooves 6 matches the number of compensating optical fibers, which is 1 to 6, preferably 2. When the number of compensating optical fibers is small, the effect is poor, and when the number is large, the operation process is complicated.

[0052] In some embodiments of the present invention, the slide rail 32 configured for the second support beam 3 is adapted to the slide groove 11 on the bottom plate, providing stable support and guidance for the second support beam 3 when it moves due to thermal expansion of the optical fiber; the slide rail 32 and the slide groove 11 are both in an inverted "T" shape.

[0053] The cooperation between the slide rail 32 and the slide groove 11 enhances the sliding stability of the second support beam 3, reduces the additional stress caused by friction and vibration during the sliding process, and ensures that the second support beam 3 can smoothly respond to the thermal expansion and stretching of the micro-nano optical fiber, thereby realizing effective adjustment of the micro-nano optical fiber during thermal expansion, avoiding stress concentration or damage to the optical fiber caused by poor sliding, and ensuring the normal operation of the micro-nano optical fiber under different temperature environments.

[0054] When the micro-nano optical fiber expands due to heat, the second support beam 3 is subjected to the axial tension of the optical fiber, and the "T"-shaped slide rail 32 slides in the "T"-shaped slide groove 11. The horizontal part of the "T"-shaped structure can withstand a large lateral force to prevent the second support beam 3 from shifting in the horizontal direction, and the vertical part can withstand a large tension to prevent the second support beam 3 from derailing due to the stretching of the optical fiber.

[0055] There is a certain gap between the slide rail 32 and the slide groove 11 to prevent the slide rail 32 and the slide groove 11 from getting stuck during thermal expansion, thereby ensuring that the second support beam 3 can slide smoothly.

[0056] In some embodiments of the present invention, the slide rail 32 and the second support beam 3 are designed as an integrated whole, which can be understood as a slide rail 32 with a "T"-shaped structure buckled in the direction from the lower end surface of the second support beam 3 to the upper end surface, and a slide groove 11 is provided on the corresponding base 1. On the one hand, it is beneficial to ensure the height consistency of the first support beam 2 and the second support beam 3; on the other hand, when the micro-nano optical fiber expands due to heat and generates tension on the second support beam 3, the integrated structure can better transmit and withstand the tension, thereby ensuring the stability and reliability of the second support beam 3 during the thermal expansion adjustment process.

[0057] In some embodiments of the present invention, the micro-nano optical fiber and the compensation optical fiber are fixed to the first support beam 2 and / or the second support beam 3 by ultraviolet glue fixation or clamp pressing fixation;

[0058] The connection between the bottom plate and the first support beam 2 is bolt connection or glue connection, such as Figure 1 and Figure 3 As shown, the connection method between the bottom plate and the first support beam 2 is bolt connection, and bolt holes are provided at corresponding positions of the bottom plate and the first support beam 2; Figure 2 and Figure 4 As shown, the bottom plate and the first support beam 2 are connected by glue.

[0059] For the fixation of the micro-nano optical fiber and the compensating optical fiber, UV glue fixation or clamp pressing fixation can ensure the stable installation of the micro-nano optical fiber on the support beam according to different situations, so that it can effectively drive the second support beam 3 to move during thermal expansion, and will not fall off the support beam due to loose fixation.

[0060] For the base plate and the first support beam 2, bolt connection or glue connection can ensure the stability of the structure, so that the entire packaging structure maintains overall stability and reliability when the micro-nano optical fiber expands thermally, and avoids affecting the thermal expansion regulation and performance of the micro-nano optical fiber due to loose structural connections.

[0061] like Figure 5 As shown, the length of the lumbar region of the micro-nano optical fiber probe is between 1 and 10 mm.

[0062] In some embodiments of the present invention, the length L1 of the probe lumbar region of the micro-nano optical fiber and the length L2 of the first gap 5 satisfy the following relationship:

[0063] 1≤L2 / L1≤5.

[0064] In some embodiments of the present invention, the length L1 of the lumbar region of the probe of the micro-nano optical fiber and the movable distance L3 of the second support beam 3 on the base 1 satisfy the following relationship: 0.1≤L3 / L1≤2; when the above relationship is satisfied, it can ensure that the movement range of the second support beam 3 is reasonable when it moves due to the thermal expansion of the micro-nano optical fiber, which not only provides sufficient adjustment space for the thermal expansion of the micro-nano optical fiber, but also avoids affecting the performance of the micro-nano optical fiber due to the excessive or small movement range of the second support beam 3, optimizes the adjustment ability of the micro-nano optical fiber packaging structure to thermal expansion, and ensures the performance stability and reliability of the micro-nano optical fiber under different temperature environments.

[0065] Four models were simulated, including no packaging of the micro-nano optical fiber, fixed packaging structure at both ends (the first support beam and the second support beam are immovable), fixed using the packaging structure of the present invention without using compensation optical fiber, and fixed using the packaging structure of the present invention and using compensation optical fiber. The optical fiber deformation of different simulation models is shown in FIG. Figure 6-9 shown.

[0066] like Figures 6 to 9 , the micro-nano optical fiber has undergone significant deformation under the action of fluid and heat. When the micro-nano optical fiber is not packaged, the maximum deformation of the waist area of ​​the micro-nano optical fiber is 197.66μm; when the two ends of the packaging structure are fixed (the first support beam and the second support beam are immovable), the maximum deformation of the waist area of ​​the micro-nano optical fiber is 157.62μm; when the packaging structure of the present invention is used without compensation optical fiber, the maximum deformation of the waist area of ​​the micro-nano optical fiber is 2.14μm; when the packaging structure of the present invention is used with compensation optical fiber, the maximum deformation of the waist area of ​​the micro-nano optical fiber is 1.78μm.

[0067] The simulation results show that the total deformation of the micro-nano optical fiber can be effectively reduced by using the packaging structure, and the use of the pin-type packaging structure can greatly reduce the optical fiber deformation (157.62μm→2.14μm), which verifies the effectiveness of the packaging structure; by adding compensating optical fiber to the packaging structure, the deformation of the micro-nano optical fiber is reduced (2.14μm→1.78μm), which verifies the effectiveness of the compensating optical fiber.

[0068] Parts of the present invention that are not described in detail belong to the well-known technology in the art.

[0069] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0070] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The various embodiments can be combined as needed, and the same or similar parts can refer to each other.

[0071] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A micro-nano optical fiber packaging structure, characterized in that: include: Base (1); A first support beam (2) fixed on the base (1); a second support beam (3) disposed on the base (1), the second support beam (3) being slidable in a direction approaching or moving away from the first support beam (2); The first support beam (2) and the second support beam (3) are both provided with a first strip groove (4) for installing the micro-nano optical fiber, and the two first strip grooves (4) are on the same straight line; A first gap (5) is provided between the first supporting beam (2) and the second supporting beam (3).

2. The micro-nano optical fiber packaging structure according to claim 1, characterized in that: The first support beam (2) is provided with a guide hole (21), and the second support beam (3) is provided with a guide rod (31) adapted to the guide hole (21); The guide rod (31) extends into the guide hole (21).

3. The micro-nano optical fiber packaging structure according to claim 2, characterized in that: There is a gap between the guide rod (31) and the guide hole (21).

4. The micro-nano optical fiber packaging structure according to claim 1, characterized in that: The first support beam (2) and the second support beam (3) are both provided with a plurality of second strip grooves (6) parallel to the first strip grooves (4) for installing compensating optical fibers.

5. The micro-nano optical fiber packaging structure according to claim 1, characterized in that: The second support beam (3) is provided with a slide rail (32), and the slide rail (32) is adapted to the slide groove (11) on the bottom plate.

6. The micro-nano optical fiber packaging structure according to claim 5, characterized in that: The slide rail (32) and the slide groove (11) are both in an inverted "T" shape.

7. The micro-nano optical fiber packaging structure according to claim 6, characterized in that: The slide rail (32) and the second support beam (3) are an integrated structure.

8. The micro-nano optical fiber packaging structure according to claim 4, characterized in that: The micro-nano optical fiber and the compensating optical fiber are fixed to the first support beam (2) and / or the second support beam (3) by ultraviolet glue fixation or clamp pressing fixation; The base plate and the first support beam (2) are connected by bolt connection or glue connection.

9. The micro-nano optical fiber packaging structure according to claim 1, characterized in that: The length L1 of the probe lumbar region of the micro-nano optical fiber and the length L2 of the first gap (5) satisfy the following relationship: 1≤L2 / L1≤5.

10. The micro-nano optical fiber packaging structure according to claim 6, characterized in that: The length L1 of the probe lumbar region of the micro-nano optical fiber and the movable distance L3 of the second support beam (3) on the base (1) satisfy the following relationship: 0.1≤L3 / L1≤2.

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