Superconducting wire assembly of double-optical-fiber strain monitoring source, manufacturing method and related device

Abstract

The invention provides a superconducting wire assembly of a double-optical-fiber strain monitoring source, a manufacturing method and a related device, and relates to the technical field of superconducting magnet monitoring, and the superconducting wire assembly comprises a superconducting wire strand, a first wire, a first optical fiber detection source, a second optical fiber detection source and a supporting conductor. The first optical fiber detection source is located on the surface of the supporting conductor; the supporting conductor is provided with a groove which extends axially; the superconducting wire strand is formed by twisting a plurality of superconducting wires with the first wire as the axis, and the twisted superconducting wire strand is embedded in the groove of the supporting conductor. The first wire is of a hollow structure and sleeves the second optical fiber detection source; in the superconducting coil manufacturing process, deformation errors can be strictly controlled, the uniformity and stability of each layer of coil in the winding process are guaranteed, the structural precision of the whole superconducting coil is fundamentally guaranteed, overall performance reduction caused by single-layer deformation accumulation is avoided, and the reworking risk is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of superconducting magnet monitoring, and particularly to a superconducting wire assembly with a dual-fiber strain monitoring source, a manufacturing method, and related devices. Background Art

[0002] Since the discovery of superconducting materials, with their unique properties such as zero resistance and perfect diamagnetism, they have shown great application potential in modern high-tech fields; among them, niobium-tin (Nb 3 Sn) superconducting wire materials are widely used in key fields such as particle accelerators and nuclear magnetic resonance imaging (MRI) because they can still maintain superconducting properties at high magnetic fields and relatively high temperatures.

[0003] However, although niobium-tin superconducting wire materials have excellent electrical properties, their mechanical properties and sensitivity to stress have become a major obstacle on the road of technical application. First, there is a contradiction between the complexity and reliability of the superconducting wire manufacturing process - mechanical strain generated during winding, heat treatment, and assembly is likely to cause superconducting degradation or even quench, and existing single-point strain monitoring methods are greatly interfered by temperature drift, and traditional sensors are difficult to work stably in low-temperature and strong electromagnetic environments; second, there is a lag in process control - parameters such as winding tension and potting curing rely on empirical settings and lack a real-time feedback mechanism, and defects often lag until the excitation stage is exposed, resulting in high rework costs.

[0004] Although the current integrated fiber optic sensing solutions have partially solved the electromagnetic compatibility problem, there are still significant limitations: 1) The single-fiber monitoring source is prone to data interruption due to coating failure, especially with low survival rates during the high-temperature heat treatment stage; 2) It is difficult to decouple the strain data from the coupling effects of multiple physical fields (electromagnetic-thermal-mechanical), making it difficult to directly guide process optimization; 3) There is a lack of strain threshold warning and dynamic compensation mechanisms, unable to block the accumulation of systematic errors. In addition, problems such as the control of the interference fit amount during the cold assembly of superconducting coils and the balance of the potting structure strength and material efficiency still rely on repeated iterations of off-line tests; this makes the process design and optimization lack sufficient basis during the manufacturing process of superconducting magnets, difficult to effectively improve the manufacturing success rate of superconducting magnets, and limits the application and development of superconducting technology in a wider range of fields. Summary of the Invention

[0005] Based on the above problems, the present invention provides a superconducting wire assembly with a dual-fiber strain monitoring source, a manufacturing method, and related devices, breaking through the technical barriers of precise strain control and early defect intervention in the manufacturing process of superconducting wire materials; directly integrating the fiber strain detection source into the superconducting wire, during the process of making a superconducting coil, strict control of deformation errors can be achieved, ensuring the quality of each layer of winding, ensuring the uniformity and stability of each layer of the coil during the winding process, fundamentally guaranteeing the structural accuracy of the entire superconducting coil, avoiding the decline of the overall performance caused by the accumulation of single-layer deformation, reducing the risk of rework, and at the same time, the strain conditions of the entire superconducting coil can be directly monitored; the monitoring data is intuitive and reliable.

[0006] In the first aspect, the present invention provides a superconducting wire assembly with a dual-fiber strain monitoring source, including:

[0007] Superconducting wire strands, a first wire, a first fiber detection source, a second fiber detection source, and a support conductor;

[0008] The first fiber detection source is located on the surface of the support conductor;

[0009] The support conductor is provided with a groove extending axially; the superconducting wire strands are formed by twisting multiple superconducting wires around the first wire as the axis, and the twisted superconducting wire strands are embedded in the groove of the support conductor;

[0010] The first wire has a hollow structure and is sleeved on the second fiber detection source.

[0011] Preferably, the support conductor, the superconducting wire strands, and the first wire are integrally fixed by soldering.

[0012] Preferably, the material of the first wire is copper.

[0013] Preferably, the material of the support conductor is copper.

[0014] Preferably, the second fiber detection source is a fiber core; a first protective coating is provided on the surface of the fiber core.

[0015] Preferably, at least one second protective coating and at least one third protective coating are provided on the inner surface of the support conductor, the first fiber detection source is located between the second protective coating and the third protective coating, and the first fiber detection source is a fiber coating.

[0016] Preferably, the depth of the groove of the support conductor is 1.2 to 1.5 times the diameter of the superconducting wire strands, and the width of the bottom of the groove matches the outer diameter of the twist of the superconducting wire strands.

[0017] Preferably, the twisted structure of the superconducting wire strands forms an annular cavity, and the hollow copper core wire penetrates through the annular cavity.

[0018] Preferably, the first protective coating, the second protective coating, and the third protective coating are all high-temperature resistant coatings.

[0019] Second, the present invention provides a method for manufacturing a superconducting wire assembly for the superconducting wire assembly of any one of the double-fiber strain monitoring sources of the present invention, including the following steps:

[0020] Step S1: Coat the third protective coating, the first optical fiber detection source, and the second protective coating on the bottom of the groove of the heat-treated support conductor in sequence;

[0021] Step S2: Embed the second optical fiber strain monitoring source into the first conductor cavity, and coat a high-temperature resistant protective layer on the outside of the first conductor;

[0022] Step S3: Twist the superconducting wire strands around the first conductor to form a twist, embed the twisted wire harness into the groove of the support conductor, and fix the overall structure by soldering.

[0023] Third, the present invention provides a method for manufacturing a superconducting coil, which is wound by any one of the superconducting wire assemblies of the present invention. The method includes:

[0024] Based on the real-time strain distribution data of the double-fiber monitoring source, adjust the winding tension and / or process during the winding of the superconducting wire assembly into a multi-layer coil, so that the coil strain and size dynamically converge to the design threshold;

[0025] Inject glue into the coil with adjusted strain and size for curing, and dynamically allocate the glue injection amount in the high-strain and low-strain areas according to the strain distribution and outer diameter deviation model;

[0026] If the local strain of the coil exceeds the quench critical threshold after curing, trigger the process backtracking or assembly termination instruction.

[0027] Preferably, the adjusting the winding tension and / or process during the winding of the superconducting wire assembly into a multi-layer coil based on the real-time strain distribution data of the double-fiber monitoring source, so that the coil strain and size dynamically converge to the design threshold; includes:

[0028] Based on the real-time strain distribution data of the double-fiber monitoring source, control the winding tension to control the single-layer deformation error within the first preset range;

[0029] Match the inverse value of the outer diameter of the wound coil with the inner diameter of the cold assembly skeleton, and calculate the dynamic interference amount; when the interference amount deviation exceeds the second preset range, trigger the double-factor correction of tension-temperature;

[0030] Implement an independent monitoring and rapid response mechanism for the inner ring strain-sensitive area. When the monitored value approaches the critical threshold, preferentially execute the local stress unloading strategy.

[0031] Preferably, controlling the winding tension based on the real-time strain distribution data of the dual-fiber monitoring source includes:

[0032] Obtaining a strain deviation according to the target strain and the actual strain at each position;

[0033] Determining a tension adjustment amount according to the tension adjustment coefficient and the strain deviation.

[0034] Preferably, obtaining a strain deviation according to the target strain and the actual strain at each position includes:

[0035] Performing weighted fusion on the data collected by the first fiber detection source and the second fiber detection source to determine the fused strain;

[0036] Denosing the fused strain to obtain the actual strain;

[0037] According to the initial target strain range and the number of coil winding layers, adjusting the target strain range in real time to obtain an adjusted target strain range;

[0038] Obtaining a strain deviation according to the actual strain and the adjusted target strain range.

[0039] Fourthly, the present invention provides a superconducting magnet, including:

[0040] A superconducting coil wound by the superconducting wire assembly according to any one of the present invention;

[0041] A skeleton; the superconducting coil is assembled within the skeleton.

[0042] Fifthly, the electronic device includes a memory and a processor, the memory stores a computer program, and when the processor executes the computer program, the steps of the method according to any one of the claims of the present invention are implemented.

[0043] Sixthly, the present invention provides a computer-readable storage medium, the storage medium stores computer instructions, and when a computer reads the computer instructions, the computer executes the steps of the method according to any one of the present invention.

[0044] Compared with the prior art, the beneficial effects of the present invention include at least: breaking through the technical barriers of precise strain control and early defect intervention in the manufacturing process of superconducting wires through an optical fiber integrated structure resistant to extreme environments, a multi-source data fusion algorithm, and a real-time optimization mechanism for process parameters, including: dual redundant optical fiber strain gauges embedded in superconducting wires, combined with high-temperature resistant composite coatings, to achieve full life cycle survival monitoring from winding to excitation; constructing a strain-displacement-multi-physical field mapping model to convert strain data after temperature decoupling into process control instructions; pioneering a collaborative control strategy for adaptive compensation of winding tension, intelligent allocation of glue injection dosage, and active suppression of quench risk, which significantly improves the first-time pass rate and performance consistency of superconducting magnet manufacturing; in the production In the process of forming the superconducting coil, the deformation error can be strictly controlled, which ensures the quality of each layer of winding, and ensures the uniformity and stability of each layer of coil during the winding process, fundamentally guarantees the structural accuracy of the entire superconducting coil, avoids the overall performance degradation caused by the accumulation of single-layer deformation, and reduces the risk of rework; the superconducting wire strands are twisted with the first wire as the axis and embedded in the groove of the supporting conductor. This tight structural connection method makes the entire superconducting wire assembly form a stable whole; when subjected to complex external stresses, such as mechanical vibration, stretching or extrusion, relative displacement is not easy to occur between the components, effectively resisting stress interference, greatly enhancing the structural stability of the superconducting wire assembly, and reducing the performance degradation caused by structural looseness. The risk of being reduced significantly extends the service life of the component; the first optical fiber detection source is located on the surface of the supporting conductor, and the second optical fiber detection source is set in the hollow structure of the first conductor to monitor the strain of the superconducting wire component from different positions and angles; the optical fiber strain detection source is directly integrated into the superconducting wire, and after being made into a superconducting coil, it can directly monitor the full degree of strain of the entire superconducting coil; the signal of the optical fiber strain detection source is less affected by temperature, and the magnetic field, electric field, and temperature field for realizing superconductivity can be intuitively reflected in the changes in strain data; it is used under extremely low temperature conditions for the assembly and use of superconducting coils, and there are two monitoring sources, so the monitoring data is reliable; the dual optical fiber strain monitoring sources are protected by high-temperature resistant coatings to improve the superconducting wire The survival rate during the manufacturing, heat treatment and winding process; the signal conversion is convenient, and the strain can be converted into displacement when displayed, and the data is more intuitive; the support conductor provides solid mechanical support for the superconducting wire by tightly wrapping the superconducting wire strands. When external stress is applied, the support conductor can effectively disperse the stress and prevent the superconducting wire strands from being subjected to excessive concentrated stress, which greatly enhances the overall mechanical strength of the superconducting wire assembly. During the operation of the superconducting wire, once the superconducting state is quenched, a large amount of heat will be generated when the superconducting state is transformed into the normal state; the support conductor and the first wire can quickly transfer this heat with their good thermal conductivity; on the one hand, timely heat dissipation helps to avoid irreversible damage to the superconducting wire assembly caused by excessive local temperature;On the other hand, the rapid dissipation of heat enables the temperature of the superconducting wire to decrease as soon as possible. When the temperature drops below the superconducting critical temperature, the superconducting wire can resume its superconducting state, ensuring the safe and stable operation of the entire superconducting wire assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 is a schematic cross-sectional view of the superconducting wire assembly according to an embodiment of the present invention;

[0046] Figure 2 is a schematic three-dimensional structure view of the superconducting wire assembly according to an embodiment of the present invention;

[0047] Figure 3 is a schematic view of the manufacturing method of the superconducting wire assembly according to an embodiment of the present invention;

[0048] Figure 4 is a schematic view of the manufacturing method of the superconducting coil according to an embodiment of the present invention;

[0049] Figure 5 is a schematic view of the strain monitoring device according to an embodiment of the present invention.

[0050] In the figure: 1, superconducting wire strand; 2, first wire; 3, first optical fiber detection source; 4, second optical fiber detection source; 5, support conductor; 6, first protective coating; 7, second protective coating; 8, third protective coating. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0051] In view of the deficiencies in the prior art, the applicant of this case has proposed the technical solution of this application through long-term research and a large number of practices. The following will further explain and illustrate the technical solution, its implementation process and principles, etc. in combination with the drawings in the embodiments of this application and specific implementation cases.

[0052] It should be noted that the embodiments described below with reference to the drawings are exemplary and are only used to explain this application, and should not be construed as a limitation to this application. The described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, this application covers any alternatives, modifications, equivalent methods and solutions made within the spirit, principle and scope defined by the claims of this application. All other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of this application.

[0053] In the description of this application, terms such as "first", "second", "third" and similar words do not denote any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "a" or "one" do not denote a quantity limitation, but mean that there is at least one. Words such as "comprising" or "including" mean that the elements or objects appearing before "comprising" or "including" cover the elements or objects listed after "comprising" or "including" and their equivalents, and do not exclude other elements or objects. Words such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0054] In the description of this application, the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to this application. In addition, when using position terms such as both sides, outer side, upper and lower, etc., it should be understood that they are only used for convenience of understanding and description, considering that the structure may be facing other positions.

[0055] In the description of this application, unless otherwise clearly specified and defined, the technical terms or scientific terms used should have the ordinary meaning understood by those of ordinary skill in the art to which this application belongs. Terms such as "installed", "connected", "coupled", etc. should be understood in a broad sense. For example, they can be fixedly connected, detachably connected, or in a contact connection or an integral connection; for those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0056] Furthermore, in order to enable the public to have a better understanding of this application, in the following detailed description of this application, some specific details are described in detail. Those skilled in the art can fully understand this application without the description of these details.

[0057] Embodiment 1: Referring to the attached Figures 1-2 : This embodiment provides a superconducting wire assembly for a dual-fiber strain monitoring source, including:

[0058] Superconducting wire strands 1, a first wire 2, a first optical fiber detection source 3, a second optical fiber detection source 4, and a support conductor 5;

[0059] The first optical fiber detection source 3 is located on the surface of the support conductor 5;

[0060] The support conductor 5 is provided with an axially extending groove; the superconducting wire strand 1 is formed by twisting a plurality of superconducting wires around the first wire 2 as the axis, and the twisted superconducting wire strand 1 is embedded in the groove of the support conductor 5; wherein the superconducting wire is a niobium-tin wire;

[0061] The first conducting wire 2 is a hollow structure and is sleeved on the second optical fiber detection source 4 .

[0062] It can be understood that when the superconducting wire assembly is subjected to external stress in actual application, the superconducting wire strand 1 is tightly fitted with the supporting conductor 5, and the stress will be transmitted to the supporting conductor 5. At this time, the first optical fiber detection source 3 located on the surface of the supporting conductor 5 will produce corresponding strain due to the deformation of the supporting conductor 5, and its internal signal transmission characteristics will also change accordingly. By detecting the change in the signal, it is possible to obtain information such as the magnitude and direction of the stress borne by the superconducting wire assembly. At the same time, the first conductor 2 sleeved on the second optical fiber detection source 4, due to its hollow structure, will also drive the first conductor 2 to deform when the superconducting wire strand 1 is deformed, thereby causing the signal of the second optical fiber detection source 4 to change as well, and the strain of the superconducting wire assembly is monitored from another angle; the two optical fiber detection sources simultaneously monitor the strain from different positions and angles, complement and verify each other, and ensure that the acquired data is more accurate and comprehensive; eliminate measurement errors caused by local material defects or temperature drift.

[0063] The superconducting wire strands 1 are twisted around the first conductor 2 to disperse stress concentration, ensuring that the critical current density retention rate of the niobium-tin superconducting material under a magnetic field of ≥15T is greater than 95%; and the overall structure of the superconducting wire assembly is more stable, which can effectively resist various external stress interferences, reduce the relative displacement and wear between the superconducting wire strands 1, and extend the service life of the superconducting wire assembly; the optical fiber detection source uses optical signals for transmission, and has stronger anti-electromagnetic interference ability than the traditional electrical signal monitoring method, and can still ensure the stable and reliable transmission of the monitoring signal in a complex electromagnetic environment, thereby improving the reliability of the monitoring system.

[0064] Superconducting wires are usually brittle and easily damaged when subjected to mechanical stress, thus affecting their superconducting properties. The supporting conductor 5 plays a key role in this. It is made of high-strength materials and tightly wraps the superconducting wire strands 1 to provide solid mechanical support for the superconducting wire. When external stress is applied, the supporting conductor 5 can effectively disperse the stress and prevent the superconducting wire strands 1 from being subjected to excessive concentrated stress, greatly enhancing the overall mechanical strength of the superconducting wire assembly and enabling it to adapt to complex application environments, such as resisting the cable's own gravity, wind force, and tensile force during installation during power transmission.

[0065] In addition, in a large superconducting magnet system, a quench may cause serious consequences, and the support conductor 5 and the first wire 2 also play a crucial role in heat transfer; during the operation of the superconducting wire, once a quench occurs instantaneously, the superconducting state transforms into the normal state, generating a large amount of heat. The support conductor 5 and the first wire 2 quickly transfer this heat out by virtue of their good heat conduction performance; on the one hand, timely heat dissipation helps to avoid irreversible damage to the superconducting wire components caused by excessive local temperature; on the other hand, the rapid dissipation of heat enables the temperature of the superconducting wire to drop as soon as possible. When the temperature drops below the superconducting critical temperature, the superconducting wire can resume the superconducting state, ensuring the safe and stable operation of the entire superconducting wire assembly.

[0066] With the above structure, during the manufacturing process of the superconducting coil, strict control of the deformation error ensures the quality of each layer of winding, guarantees the uniformity and stability of each layer of the coil during the winding process, fundamentally ensures the structural accuracy of the entire superconducting coil, avoids the decline of the overall performance caused by the accumulation of single-layer deformation, and reduces the risk of rework.

[0067] Example 2, refer to the attached Figures 1-2 : This embodiment provides a superconducting wire assembly with a dual-fiber strain monitoring source, including:

[0068] Superconducting wire strands 1, a first wire 2, a first fiber detection source 3, a second fiber detection source 4, and a support conductor 5;

[0069] The first fiber detection source 3 is located on the surface of the support conductor 5;

[0070] The support conductor 5 is provided with an axially extending groove; the superconducting wire strands 1 are formed by twisting multiple superconducting wires around the first wire 2 as the axis, and the twisted superconducting wire strands 1 are embedded in the groove of the support conductor 5; among them, the superconducting wire is a niobium-tin wire;

[0071] The first wire 2 has a hollow structure and is sleeved on the second fiber detection source 4.

[0072] The support conductor 5, the superconducting wire strands 1, and the first wire 2 are integrally fixed by soldering.

[0073] The material of the first wire 2 is metal, preferably copper, especially oxygen-free copper;

[0074] The material of the support conductor 5 is metal, preferably copper, especially oxygen-free copper;

[0075] The second fiber detection source 4 is a fiber core; a first protective coating 6 is provided on the surface of the fiber core.

[0076] At least one layer of second protective coating 7 and at least one layer of third protective coating 8 are provided on the inner surface of the support conductor 5. The first optical fiber detection source 3 is located between the second protective coating 7 and the third protective coating 8, and the first optical fiber detection source 3 is an optical fiber coating.

[0077] The groove depth of the support conductor 5 is 1.2 to 1.5 times the diameter of the superconducting strand 1, and the width of the bottom of the groove matches the twisted outer diameter of the superconducting strand 1.

[0078] The twisted structure of the superconducting strand 1 forms an annular cavity, and the hollow copper core wire 2 penetrates through the annular cavity.

[0079] The first protective coating 6, the second protective coating 7 and the third protective coating 8 are all high-temperature resistant coatings.

[0080] The outer surface of the first wire 2 is also covered with a high-temperature resistant protective coating.

[0081] Example 3, referring to the appendix Figure 3 , a manufacturing method of a superconducting wire assembly for the superconducting wire assembly of the dual optical fiber strain monitoring source described in any one of Example 1 and Example 2, comprising the following steps:

[0082] Step S1: Coat the third protective coating, the first optical fiber detection source and the second protective coating on the bottom of the groove of the support conductor after heat treatment in sequence; wherein, the copper groove is heat-treated to form the support conductor;

[0083] Step S2: Embed the second optical fiber strain monitoring source into the first conductor cavity, and coat a high-temperature resistant protective layer on the outside of the first conductor; wherein, the prefabricated hollow copper core is used as the first conductor;

[0084] Step S3: Twist the superconducting strands around the first conductor to form a shape, embed the twisted wire harness into the groove of the support conductor, and fix the overall structure by soldering.

[0085] In a possible implementation manner, the support conductor 5 is used as the support of the superconducting wire structure through heat treatment; for example: using T2 grade oxygen-free copper, forming a U-shaped groove body through precision cold rolling, and controlling the dimensional tolerance of the groove body within ±0.05 mm; in a hydrogen protection atmosphere furnace, performing recrystallization annealing at 650 °C for 2 hours to eliminate cold working stress and ensure the ductility and tensile strength of the copper support. The annealed copper groove has both mechanical support and heat dissipation channel functions, and the groove depth and width are dynamically matched according to the diameter of the superconducting strand 1 (for example, when the wire strand diameter is 2 mm, the groove depth is 2.6 mm and the width is 2.2 mm).

[0086] The material of the support conductor 5 is preferably oxygen-free copper, and it is provided with an axially extending groove. The main function is to enhance the overall strength of the superconducting wire assembly. Since the superconducting wire is brittle, the support conductor can effectively disperse external stress and prevent the superconducting wire strands 1 from being damaged. The depth of the groove is 1.2 - 1.5 times the diameter of the superconducting wire strands 1, and the bottom width matches the outer diameter of the twisted superconducting wire strands 1. This design can not only tightly accommodate the superconducting wire strands 1 but also provide a certain buffer space when the superconducting wire strands 1 undergo minor deformation. At the moment of quench, the support conductor 5 also participates in heat transfer and assists the superconducting wire to recover to the superconducting state.

[0087] In a possible implementation, a plasma spraying process can be used to deposit a third protective coating 8 (such as an alumina ceramic layer) on the bottom of the groove; a first optical fiber detection source 3 (an optical fiber sensitive coating, such as borosilicate glass doped with Er 3 +) is coated on the third protective coating 8, and the curing temperature can be 380°C to form a continuous sensing path; a second protective coating 7 (such as: zirconia (ZrO 2 )) coating with a thickness of 150μm is plasma sprayed on the first optical fiber detection source 3 to form a thermal expansion coefficient gradient with the third protective coating 8 (bottom layer CTE 8.5×10 -6 / °C → outer layer CTE 10.5×10 -6 / °C) to inhibit high-temperature cracking. The second protective coating 7 and the third protective coating 8 provided on the inner surface of the support conductor 5, on the one hand, protect the first optical fiber detection source 3 from possible mechanical damage or chemical erosion inside the support conductor; on the other hand, they also play an isolation and buffering role, reducing the friction between the superconducting wire strands 1 and the inner wall of the support conductor 5, as well as the direct impact of external stress on the first optical fiber detection source 3, ensuring that the first optical fiber detection source 3 can stably and accurately monitor the strain of the support conductor.

[0088] The first optical fiber detection source 3 is located on the surface of the support conductor 5 and is between the second protective coating 7 and the third protective coating 8. It is an optical fiber coating structure used to monitor the deformation of the support conductor 5. When the support conductor 5 deforms due to external stress or the action of the superconducting wire strands 1, the optical signal transmission characteristics of the first optical fiber detection source 3 will change, thereby detecting the magnitude and direction of the stress borne by the superconducting wire assembly, providing data support for the safe and stable operation of the superconducting wire assembly, and achieving high-precision strain monitoring.

[0089] In a possible implementation, multiple niobium-tin superconducting strands 1 are twisted around a copper core, for example, with a pitch length of 120 mm (pitch / diameter ratio = 150:1), and the twisting tension is controlled within 5 N ± 0.5 N; the niobium-tin superconducting wire has a relatively high critical temperature and critical current density, and can transmit current without resistance under specific conditions, and is used in fields such as high-efficiency power transmission and strong magnetic field generation. The stranded structure increases the overall flexibility and mechanical strength, making it more adaptable to complex installation and usage environments. The superconducting strand 1 is embedded in the groove of the support conductor 5 and works together with the support conductor 5 to ensure that stress can be effectively dispersed when stressed, and to guarantee the stability of the superconducting performance.

[0090] The first wire 2 can be prepared by a swaging process. The first wire has extremely small outer and inner diameter dimensions, which can ensure that the second optical fiber detection source can freely pass through the first wire. (For example, a copper tube with an outer diameter of 2 mm and a wall thickness of 0.3 mm (the cross-sectional area ratio of the cavity is 28.3%), and a 2-μm-thick silicon nitride (Si 3 N 4 ) insulating layer is formed on the inner wall by chemical vapor deposition (CVD). The material of the first wire 2 is preferably oxygen-free copper and is a hollow structure. On the one hand, as the axis of the twisting of the superconducting strand 1, it provides a stable support structure for the superconducting strand 1, ensuring the stability of the structure of the twisted superconducting strand 1 and reducing the friction and displacement between the internal superconducting wires; on the other hand, at the moment of quench, it transmits heat by virtue of the good thermal conductivity of the metal to help the superconducting wire recover to the superconducting state; its outer surface is covered with a high-temperature protection coating, which can prevent oxidation or corrosion in a high-temperature environment, extend the service life, and ensure stable performance under various working conditions; at the same time, the hollow structure is used to sleevethe second optical fiber detection source 4, providing a structural basis for strain monitoring.

[0091] The optical fiber is inserted into the cavity of the first wire 2, and high-temperature silica gel (temperature resistance -196~300 °C) can be injected for fixation; copper has good electrical conductivity and mechanical strength, which can not only provide stable support for the superconducting strand 1, but also assist in current transmission to a certain extent, enhancing the electrical performance of the entire component; the diameter of the first wire 2 is accurately determined according to the design requirements of the superconducting wire assembly to ensure an appropriate ratio with the superconducting strand 1 to achieve the best structural stability and performance. The high-temperature protection coating must have excellent high-temperature resistance, be able to withstand the high temperature that may be generated during the operation of the superconducting wire, and at the same time, it should also have good insulation and mechanical protection performance to prevent the superconducting wire from being eroded and physically damaged by the external environment. Common high-temperature coating materials include ceramic-based coatings, silicone-based coatings, etc.

[0092] The second optical fiber detection source 4 is an optical fiber core, with a first protective coating 6 provided on its surface. The second optical fiber detection source 4 is arranged inside the hollow structure of the first conductor 2 to monitor the strain condition of the superconducting wire assembly from another position and angle. It complements and verifies with the first optical fiber detection source 3 to further improve the accuracy and comprehensiveness of strain monitoring, enabling the entire monitoring system to more precisely capture the state changes of the superconducting wire assembly under various working conditions. The first protective coating 6 covers the surface of the optical fiber core of the second optical fiber detection source 4 and is a high-temperature resistant coating, protecting the second optical fiber detection source 4 from the influence of high-temperature environments, ensuring that the optical fiber core can stably transmit optical signals during the operation of the superconducting wire assembly even when encountering high-temperature working conditions, guaranteeing that the strain monitoring function is not affected, and improving the service life and monitoring reliability of the second optical fiber detection source 4.

[0093] After completing the twisting and installation of the optical fiber strain core, the surface of the entire superconducting wire assembly is treated to remove surface impurities and oil stains to ensure that the high-temperature resistant coating can firmly adhere to the surface of the assembly; for example, chemical cleaning, ultrasonic cleaning and other methods can be used to ensure that the surface cleanliness meets the requirements.

[0094] All the structures in the grooves of the support conductor 5 are soldered with tin; soldering can form a firm connection between components such as the superconducting wire strands 1, the first conductor 2, the support conductor 5, and the optical fiber detection source. By filling the contact gaps between components with liquid tin and allowing it to cool and solidify, the components are tightly combined into a whole. When the superconducting wire assembly is subjected to external forces such as pulling and vibration and other complex working conditions, relative displacement between components is not likely to occur, further enhancing the structural stability of the entire assembly, reducing performance degradation or failures caused by component loosening, and effectively extending the service life of the superconducting wire assembly; tin itself has good electrical conductivity, and the solder layer formed at the connection points of metal components can reduce the contact resistance, making the current transmission between the superconducting wire strands 1, the first conductor 2, and the support conductor 5 smoother; especially when the superconducting wire is operating normally and transmitting large currents, the low contact resistance can reduce energy loss, improve the power transmission efficiency of the superconducting wire assembly, and ensure the stable performance of superconductivity. In the case where the superconducting wire may experience a quench, the solder layer can assist in the rapid transfer of heat between components. For example, when the first conductor 2 and the support conductor 5 transmit heat during a quench instant, the solder layer can serve as a bridge for heat conduction, allowing the heat to spread more evenly and efficiently, accelerating the reduction of the superconducting wire temperature, and helping it to recover to the superconducting state faster, ensuring the stable operation of the superconducting wire assembly under extreme conditions. The solder layer can, to a certain extent, isolate external factors such as air and moisture from eroding the internal structure of the assembly. It prevents metal components from rusting and oxidizing, and protects the optical fiber detection source from being damaged by chemical substances, thereby maintaining the stable performance of the superconducting wire assembly and improving its adaptability and reliability in different environments.

[0095] Using professional spraying equipment or dipping process, evenly apply the high-temperature resistant coating on the outer side of the superconducting wire assembly; during the spraying or dipping process, strictly control the thickness and uniformity of the coating to ensure that the coating can provide comprehensive and effective protection; for the spraying process, precisely adjust the pressure, spraying distance, and spraying angle of the spray gun to achieve uniform coating coverage; for the dipping process, control the dipping time and pulling speed to ensure that the coating thickness meets the design requirements.

[0096] After the coating is applied, perform high-temperature curing treatment to form a hard and dense protective layer for the high-temperature resistant coating; according to the characteristics of the coating material, set appropriate curing temperature and time to ensure that the performance of the coating is fully exerted; during the curing process, monitor the assembly in real time to prevent deformation or damage of the assembly caused by excessive temperature or uneven curing.

[0097] Example 5, referring to the appendix Figure 4 , a method for manufacturing a superconducting coil, wound by the superconducting wire assembly according to any one of the embodiments of the present application, the method comprising:

[0098] Based on the real-time strain distribution data of the dual-fiber monitoring source, adjust the winding tension and / or process during the winding of the superconducting wire assembly into a multi-layer coil, so that the coil strain and size dynamically converge to the design threshold;

[0099] Perform potting and curing on the coil with adjusted strain and size; during the potting and curing process, dynamically allocate the potting amount in the high and low strain regions according to the strain distribution and outer diameter deviation model;

[0100] If the local strain of the coil exceeds the quench critical threshold after curing, trigger the process backtracking or assembly termination instruction.

[0101] In a possible implementation manner, the adjusting the winding tension and / or process during the winding of the superconducting wire assembly into a multi-layer coil based on the real-time strain distribution data of the dual-fiber monitoring source, so that the coil strain and size dynamically converge to the design threshold; includes:

[0102] Based on the real-time strain distribution data of the dual-fiber monitoring source, control the winding tension to control the single-layer deformation error within the first preset range;

[0103] Match the inverse value of the outer diameter of the wound coil with the inner diameter of the cold assembly skeleton, and calculate the dynamic interference amount; when the interference amount deviation exceeds the second preset range, trigger the dual-factor correction of tension-temperature; that is, fine-tuning of tension and gradient heat treatment compensation;

[0104] Implement an independent monitoring and rapid response mechanism for the inner ring strain sensitive area. When the monitored value approaches the critical threshold, execute the local stress unloading strategy, including the combination of tension release and low-temperature annealing.

[0105] In a possible implementation, controlling the winding tension based on the real-time strain distribution data of the dual-fiber monitoring source includes:

[0106] Obtaining the strain deviation according to the target strain and the actual strain at each position;

[0107] Determining the tension adjustment amount according to the tension adjustment coefficient and the strain deviation; wherein, the current tension adjustment coefficient can be determined according to the current temperature, the preset temperature, and the initial coefficient;

[0108] The tension adjustment amount is obtained by the following formula:

[0109] ΔN = k×Δε×f d

[0110]

[0111] k = k0×(1 + α×(T - T0))

[0112] wherein, ΔN is the tension adjustment amount; Δε is the strain deviation, ε real,i is the actual strain at the i-th position; k is the current tension adjustment coefficient; ε min is the target minimum strain; ε max is the target maximum strain; q i is the weight of the strain at the i-th position; the weight of the point closer to the key stress area is larger; m is the maximum value of i; f d is the strain distribution unevenness coefficient, determined according to the standard deviation of the actual strain data; α is the temperature influence coefficient, α < 0.01; T is the current ambient temperature, T0 is the preset ambient temperature; k0 is the initial coefficient, determined according to the material properties.

[0113] In a possible implementation, obtaining the strain deviation according to the actual strain and the target strain at each position includes:

[0114] Performing weighted fusion on the data collected by the first fiber detection source and the second fiber detection source to determine the fused strain;

[0115] ε mix = w 1 ε 1 + w 2 ε 2

[0116]

[0117] w 2 = 1 - w 1

[0118] Among them, w1 and w2 are weight coefficients; n is the number of coil winding layers, and n0 is the preset number of winding layers (the turning point of the number of winding layers); ε 1 is the first strain data (the strain data of the first optical fiber detection source in the same area), and ε 1 is the second strain data (the strain data of the second optical fiber detection source in the same area);

[0119] The fused strain ε mix is denoised by wavelet transform filtering, the signal is decomposed into different frequency sub-bands, the high-frequency noise sub-bands are removed, and then the actual strain ε real is reconstructed;

[0120] According to the initial target strain range and the number of coil winding layers, the target strain range is adjusted in real time to obtain the adjusted target strain range;

[0121] ε min = p×ε min0

[0122] ε max = p×ε max0

[0123] p = 1 - n / N

[0124] where, [ε min , ε max is the adjusted target strain range; [ε min0 , ε max0 is the initial target strain range, p is the material fatigue coefficient; N is the preset total number of winding layers.

[0125] According to the actual strain and the adjusted target strain range, the strain deviation is obtained.

[0126] In some possible implementation manners, after the superconducting wire winding is completed, using the final strain data collected by the dual optical fiber monitoring source, combined with the material characteristics of the superconducting wire and the winding process parameters, through the established strain-structure relationship model, the outer diameter value Dc of the coil is inversely obtained; at the same time, the inner diameter Ds of the cold assembly skeleton is accurately measured; the interference amount Ic = Dc - Ds;

[0127] Based on the mechanical property parameters (such as elastic modulus, Poisson's ratio) of the superconducting wire material and the strain distribution during the winding process, a strain-diameter conversion model is established; for isotropic superconducting wire materials, under the assumption of small deformation, the relationship between strain and diameter change can be derived through Hooke's law; let the circumferential strain of the superconducting wire during the winding process be ε θ , the initial diameter is D0, then the diameter change amount ΔD = D0×ε θ ; Dc = D0 + ΔD;

[0128] Conduct winding experiments on superconducting wire samples under different strain conditions, measure the actual diameter changes, compare with the results of model calculations, and adjust the parameters in the model to enable the model to more accurately reflect the relationship between strain and diameter; according to the calibrated strain-diameter conversion model, convert the final strain data collected by the dual-fiber monitoring source into the corresponding coil diameter change amount;

[0129] Compare the calculated dynamic interference amount Ic with the allowable deviation range [I min , I max . If Ic is within the allowable range, it is considered that the winding and assembly design meet the requirements; if Ic < I min , it indicates that the interference amount is insufficient, and it may be necessary to adjust the winding tension or appropriately process the bobbin; if Ic > I max , then the interference amount is too large, which may lead to difficult assembly or excessive internal strain of the superconducting wire. At this time, it is necessary to re-evaluate the winding process, such as adjusting the winding tension, optimizing the heat treatment process, etc., to reduce the interference amount;

[0130] Feed back the evaluation results into the entire superconducting wire winding and assembly process to provide a basis for subsequent process improvement. For example, if the interference amount is insufficient occurs multiple times, the winding tension adjustment coefficient k can be appropriately increased to adjust the winding tension more significantly during the winding process to increase the outer diameter of the coil.

[0131] In a possible implementation manner, dynamically allocate the potting amount in the high and low strain regions according to the strain distribution and outer diameter deviation model; including:

[0132] Combine the final inverted value of the coil outer diameter with the designed outer diameter for comparison to construct a strain distribution and outer diameter deviation model.

[0133] Divide the coil into multiple small regions. For each region, based on its strain history during the winding process (including maximum strain, average strain, etc.) and the current outer diameter deviation:

[0134] ΔDr = Dr - Dd

[0135] where Dr is the actual outer diameter of this region and Dd is the designed outer diameter, and establish a mapping relationship. For example, through multiple regression analysis, determine the functional relationship between the strain characteristic parameters (such as strain mean, strain standard deviation) of each region and the outer diameter deviation.

[0136] Considering the possible slight differences in the material properties of the superconducting wire in different regions (such as local hardening or softening of the material caused by the winding process), introduce a material property correction factor to correct the above function, and calibrate the correction factor through a large amount of experimental data to ensure that the model can accurately reflect the actual situation of different regions.

[0137] For the high-strain region (defined as the region where the strain value exceeds the set threshold), since the stress on the superconducting wire in this region is relatively large and the structural stability is relatively poor, more potting material is required to enhance the support. According to the outer diameter deviation calculated by the model and combined with the mechanical properties of the potting material (such as the elastic modulus), the increase ratio of the potting amount is determined. For example, if the outer diameter deviation of a certain high-strain region is positive (i.e., the actual outer diameter is greater than the designed outer diameter) and the deviation value is ΔDr high , in order to make this region return to near the designed size and ensure the structural strength after potting and curing, the increase ratio of the potting amount is:

[0138]

[0139] k 1 is a constant related to the coil structure and potting process, E wire is the elastic modulus of the superconducting wire; E resin is the elastic modulus of the potting material;

[0140] The actual potting amount V hihh = V base ×(1 + r hihh ), where V base is the basic potting amount of this region during uniform potting;

[0141] For the low-strain region, the structure is relatively stable, and the outer diameter deviation of the region is ΔDr low , and the potting amount can be appropriately reduced to optimize the material utilization rate; if the outer diameter deviation ΔDr low is within the allowable range and is small, the reduction ratio of the potting amount is:

[0142]

[0143] k 2 is a constant determined according to the material shrinkage characteristics, and the actual potting amount V low = V base ×(1 + r low ).

[0144] Before potting, according to the calculation results of the model, the potting equipment is programmed to set the potting amount parameters for different regions. During the potting process, through the automated control system, the position of the nozzle is monitored in real time to ensure that different regions are potted according to the predetermined potting amount distribution plan; for example, using machine vision technology to identify the region markings on the coil, when the nozzle moves to the high-strain region, the potting flow rate is automatically increased; when it moves to the low-strain region, the potting flow rate is reduced; during the potting process, the vacuum potting process is adopted to remove the bubbles in the glue solution to ensure that the potting glue evenly fills the gaps in the superconducting coil;

[0145] After potting is completed, the coil is cured. According to the characteristics of the potting material, a suitable curing process is selected, such as maintaining a specific time at a certain temperature and pressure, ensuring that the potting material is fully cured and tightly combined with the superconducting wire to form a stable overall structure, effectively enhancing the mechanical properties and stability of the superconducting coil.

[0146] After curing is completed, the superconducting coil is removed from the mold. During the demolding process, special demolding tools and techniques can be used, such as applying a demolding agent on the surface of the mold and using methods such as mechanical ejection or thermal expansion and contraction to achieve non-destructive demolding. After removing the mold, the dual-fiber strain monitoring source is led out from the superconducting coil; the optical fiber is connected to the external detection equipment to ensure the stability and reliability of signal transmission; during the connection process, high-precision optical fiber fusion splicing technology can be used to reduce the fusion loss and ensure the efficient transmission of optical signals.

[0147] The effects of the above technical solutions are as follows: By means of the dual-fiber monitoring source for real-time strain distribution data, the winding tension and process are dynamically adjusted, enabling precise control of the coil strain and dimensions, and stabilizing and converging them to the design threshold; Based on the deviation degree of the inner and outer diameters, tension compensation or heat treatment correction is taken in stages to achieve adaptive optimization of process parameters; It ensures that during the manufacturing process of the superconducting coil, the stress distribution of each layer of the coil is uniform, the dimensional accuracy is guaranteed, and the performance degradation caused by stress concentration or dimensional deviation is effectively avoided; The strict control of the single-layer deformation error ensures the quality of each layer of winding, and ensures the uniformity and stability of each layer of the coil during the winding process, improving the structural stability of the entire superconducting coil from the basic level, fundamentally guaranteeing the structural accuracy of the entire superconducting coil, avoiding the overall performance degradation caused by the accumulation of single-layer deformation, and reducing the risk of rework. According to the characteristics of different superconducting wire materials, the number of winding layers, and environmental factors (such as temperature, magnetic field, etc.), the tension adjustment strategy is automatically adjusted. For example, when winding superconducting wires of different materials, the algorithm can adapt to the different mechanical properties of the materials by adjusting the tension adjustment coefficient, ensuring precise tension control in various situations and significantly enhancing the adaptability of the winding process to diverse production requirements. The algorithm accurately calculates the deviation between the actual strain and the target strain. Among them, the setting of the strain weight makes the points near the key stress-bearing areas have a greater impact on the tension adjustment, ensuring more precise tension adjustment at the key parts and avoiding the influence of stress problems in the key areas on the performance of the superconducting coil; The introduction of the strain distribution non-uniformity coefficient, determined according to the standard deviation of the actual strain data, can correct the tension adjustment amount for the non-uniformity of the strain distribution, making the tension adjustment more in line with the actual strain state of the superconducting wire and further improving the accuracy of the tension adjustment; The data collected by the first and second fiber detection sources are weighted and fused. The weight coefficients change dynamically with the number of winding layers, and can reasonably allocate the weights of the data from the two fiber detection sources according to the strain characteristics of the inner and outer superconducting wires at different winding stages, more accurately reflecting the overall strain situation of the superconducting wire; The target strain range is adjusted in real time according to the number of winding layers of the coil; As the number of winding layers increases, the material fatigue coefficient gradually decreases, and the target strain range is correspondingly reduced, fully considering the fatigue characteristics of the superconducting wire material during the winding process, making the target strain range more in line with the actual production situation, and helping to better control the stress during the winding process and ensure the quality of the superconducting coil.

[0148] By establishing a strain-structure relationship model and a strain-diameter conversion model, the outer diameter of the coil is accurately inverted and the dynamic interference amount is calculated. After comparing with the allowable deviation range, the results can be timely fed back to guide operations such as winding tension adjustment, skeleton processing, or process optimization, greatly improving the adaptability of the superconducting coil to the cold-assembly skeleton, reducing the assembly difficulties or internal strain abnormalities caused by the interference amount problem, and ensuring the reliability of the superconducting coil in practical applications.

[0149] Implement an independent monitoring and rapid response mechanism for the inner ring strain-sensitive area. When the monitored value approaches the critical threshold, quickly execute the local stress unloading strategy to effectively prevent the inner ring from quenching due to excessive strain and promptly abort the subsequent processing of unqualified products, further improving the overall performance and stability of the superconducting coil.

[0150] Set a strain threshold to trigger the warning and process termination mechanism, construct a strain distribution and outer diameter deviation model, and dynamically allocate the potting amount in high and low strain areas according to the strain history and outer diameter deviation in different regions. Increase the potting amount in the high strain area to enhance support, and appropriately reduce the potting amount in the low strain area to optimize material utilization. This precise potting amount allocation strategy not only ensures the structural strength of the superconducting coil at key positions, but also avoids material waste, while improving production efficiency and product quality. Link and control the winding parameters, heat treatment conditions, and potting process to form multi-dimensional collaborative regulation in the manufacturing process, significantly shortening the production cycle and improving product consistency. Reduce manual intervention errors through automated monitoring and avoid the accumulation of systematic deviations caused by adjustment lags.

[0151] Example 6, referring to the appendix Figure 5 , this example provides a superconducting magnet, including:

[0152] The superconducting coil wound by the superconducting wire assembly described in any one of Embodiments 1 and 2 of the present application;

[0153] A skeleton; the superconducting coil is assembled inside the skeleton.

[0154] After the superconducting coil is assembled into the skeleton, a strain monitoring device as shown in the appendix is formed, and the superconducting magnet includes this strain monitoring device. During the excitation stage of the superconducting magnet, the dual-fiber strain monitoring source can be used to connect to the display device for display and conversion. If the excitation fails, the strain mutation point and magnetic field distortion area at the time of quenching can be located according to the excitation magnetic field distribution and strain monitoring situation; distinguish mechanical stress failure and electromagnetic interference factors through cross-verification of dual-source data to generate a process optimization knowledge base. Figure 5 The embodiment of the present invention also provides an electronic device, which includes a memory and a processor. The memory stores a computer program, and when the processor executes the computer program, the steps of any one of the methods described in the embodiments of the present application are implemented.

[0155] The embodiment of the present application also provides a computer-readable storage medium, which is used to store a computer program. When the computer program is executed, the steps of the method in the embodiment of the present application are implemented. The specific implementation manner is the same as the implementation manner and the achieved technical effects described in the above method embodiment, and some contents will not be repeated.

[0156] The embodiment of the present application also provides a computer-readable storage medium, which is used to store a computer program. When the computer program is executed, the steps of the method in the embodiment of the present application are implemented. The specific implementation manner is the same as the implementation manner and the achieved technical effects described in the above method embodiment, and some contents will not be repeated.

[0157] In the present application, a readable storage medium may be any tangible medium that contains or stores a program, which can be used by or in conjunction with an instruction execution system, apparatus, or device. The program product may employ any combination of one or more readable media. The readable media may be a readable signal medium or a readable storage medium. The readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium include: an electrical connection having one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0158] A computer-readable storage medium may include a data signal propagated in a baseband or as part of a carrier wave, which carries the readable program code. Such a propagated data signal may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the foregoing. The readable storage medium may also be any readable medium that can send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device. The program code contained on the readable storage medium may be transmitted using any appropriate medium, including but not limited to wireless, wired, optical fiber cable, RF, etc., or any suitable combination of the foregoing. The program code for performing the operations of the present invention may be written in any combination of one or more programming languages, including object-oriented programming languages such as Java, C++, etc., and also including conventional procedural programming languages such as the C language or similar programming languages. The program code may be executed entirely on the user computing device, partially on an associated device, as a stand-alone software package, partially on the user computing device and partially on a remote computing device, or entirely on a remote computing device or server. In the case of a remote computing device, the remote computing device may be connected to the user computing device through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computing device (e.g., through the Internet using an Internet service provider).

[0159] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention, and all such changes should fall within the scope of protection of the claims of the present invention.

Claims

1. A superconducting wire assembly of a dual optical fiber strain monitoring source, characterized in that: include: A superconducting wire strand (1), a first conductor (2), a first optical fiber detection source (3), a second optical fiber detection source (4) and a supporting conductor (5); The first optical fiber detection source (3) is located on the surface of the supporting conductor (5); The support conductor (5) is provided with an axially extending groove; the superconducting wire strand (1) is formed by twisting a plurality of superconducting wires around the first wire (2) as the axis, and the twisted superconducting wire strand (1) is embedded in the groove of the support conductor (5); The first conducting wire (2) is a hollow structure and is sleeved on the second optical fiber detection source (4).

2. The superconducting wire assembly according to claim 1, characterized in that: The support conductor (5), the superconducting wire strand (1) and the first conductor (2) are integrated and fixed by soldering.

3. The superconducting wire assembly according to claim 1, characterized in that: The second optical fiber detection source (4) is an optical fiber core; the surface of the optical fiber core is provided with a first protective coating (6).

4. The superconducting wire assembly according to claim 1, characterized in that: At least one second protective coating (7) and at least one third protective coating (8) are provided on the inner surface of the supporting conductor (5); the first optical fiber detection source (3) is located between the second protective coating (7) and the third protective coating (8); and the first optical fiber detection source (3) is an optical fiber coating.

5. The superconducting wire assembly according to claim 1, characterized in that: The groove depth of the supporting conductor (5) is 1.2 to 1.5 times the diameter of the superconducting wire strand (1), and the groove bottom width matches the twisted outer diameter of the superconducting wire strand (1).

6. The superconducting wire assembly according to claim 1, characterized in that: The twisted structure of the superconducting wire strand (1) forms an annular cavity, and the hollow copper core wire (2) passes through the annular cavity.

7. The superconducting wire assembly according to claim 1, characterized in that: The first protective coating (6), the second protective coating (7) and the third protective coating (8) are all high temperature resistant coatings.

8. A method for manufacturing a superconducting wire assembly, used for preparing the superconducting wire assembly of the dual-fiber strain monitoring source according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step S1, sequentially coating a third protective coating, a first optical fiber detection source and a second protective coating on the bottom of the supporting conductor groove after heat treatment; Step S2, embedding a second optical fiber strain monitoring source into the cavity of the first conductor, and coating a high temperature resistant protective layer on the outside of the first conductor; Step S3, twisting the superconducting wire strands around the first conductor to form a shape, embedding the twisted wire bundle into the groove of the supporting conductor, and fixing the overall structure by soldering.

9. A method for manufacturing a superconducting coil, comprising winding the superconducting wire assembly according to any one of claims 1 to 7, characterized in that: The method comprises: Based on the real-time strain distribution data of the dual optical fiber monitoring source, the winding tension and / or process of the superconducting wire assembly during winding into a multi-layer coil is adjusted to dynamically converge the coil strain and size to the design threshold; The coils with adjusted strain and size are filled with glue and solidified, and the amount of glue filling in high and low strain areas is dynamically allocated according to the strain distribution and outer diameter deviation model; If the local strain of the coil exceeds the supercritical threshold after curing, a process backtracking or assembly termination instruction is triggered.

10. The method for manufacturing a superconducting coil according to claim 9, characterized in that: The method of adjusting the winding tension and / or process of the superconducting wire assembly in the process of winding the multi-layer coil based on the real-time strain distribution data of the dual optical fiber monitoring source so as to dynamically converge the coil strain and size to the design threshold value comprises: Based on the real-time strain distribution data of the dual optical fiber monitoring source, the winding tension is controlled so that the single-layer deformation error is controlled within a first preset range; The inversion value of the outer diameter of the coil after winding is matched with the inner diameter of the cold assembly skeleton to calculate the dynamic interference; when the interference deviation exceeds the second preset range, the tension-temperature dual factor correction is triggered; An independent monitoring and rapid response mechanism is implemented for the strain-sensitive area of ​​the inner ring. When the monitoring value approaches the critical threshold, the local stress unloading strategy is preferentially executed.

11. The method for manufacturing a superconducting coil according to claim 10, characterized in that: The method of controlling the winding tension based on the real-time strain distribution data of the dual optical fiber monitoring source includes: According to the target strain amount and the actual strain amount at each position, the strain amount deviation is obtained; The tension adjustment amount is determined based on the tension adjustment coefficient and strain deviation.

12. The method for manufacturing a superconducting coil according to claim 11, characterized in that: The step of obtaining the strain deviation according to the target strain and the actual strain at each position comprises: Performing weighted fusion on the data collected by the first optical fiber detection source and the second optical fiber detection source to determine the fused strain amount; De-noise the fused strain quantity to obtain the actual strain quantity; According to the initial target strain range and the number of coil winding layers, the target strain range is adjusted in real time to obtain an adjusted target strain range; The strain deviation is obtained based on the actual strain and the adjusted target strain range.

13. A superconducting magnet, characterized in that: include: A superconducting coil wound by the superconducting wire assembly according to any one of claims 1 to 7; skeleton; The superconducting coil is assembled in the frame.

14. An electronic device, characterized in that: The electronic device comprises a memory and a processor, the memory stores a computer program, and the processor implements the steps of the method according to any one of claims 9 to 12 when executing the computer program.

15. A computer-readable storage medium, characterized in that: The storage medium stores computer instructions, and when a computer reads the computer instructions, the computer executes the steps of the method according to any one of claims 9 to 12.

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