阅读说明：本技术 一种实时检测高温超导线圈失超信号的骨架结构 (Skeleton structure for detecting quench signal of high-temperature superconducting coil in real time ) 是由 方进 吴越 刘延超 于 2020-11-12 设计创作，主要内容包括：本发明提供了一种实时检测高温超导线圈失超信号的骨架结构,包括至少两个层叠布置的骨架,每个骨架包括饼状的基体,该基体的中心具有镂空部,该基体的轴向两侧分别具有第一端面和第二端面,该第二端面具有光纤光栅槽；该光纤光栅槽分别环绕基体的轴线布置,并且相邻骨架的光纤光栅槽相互错开。光纤光栅槽内具有光纤光栅传感器组件。第一端面具有径向延伸布置的第一电流引线槽；基体还具有径向贯穿设置的第一电流引线孔,该第一电流引线孔的延伸方向与第一电流引线槽的延伸方向相互重合；基体还具有环绕镂空部,并且轴向贯穿设置的多个连接孔。本发明提供的骨架结构,相邻光纤上的光栅布局交错分布,可以实现线圈温度的分布式测量。(The invention provides a skeleton structure for detecting quench signals of a high-temperature superconducting coil in real time, which comprises at least two skeletons which are arranged in a stacking manner, wherein each skeleton comprises a cake-shaped substrate, the center of the substrate is provided with a hollow part, the two axial sides of the substrate are respectively provided with a first end face and a second end face, and the second end face is provided with an optical fiber grating groove; the optical fiber grating grooves are respectively arranged around the axis of the substrate, and the optical fiber grating grooves of adjacent frameworks are mutually staggered. The fiber grating groove is internally provided with a fiber grating sensor assembly. The first end face is provided with a first current lead groove which extends radially; the base body is also provided with a first current lead hole which radially penetrates through the base body, and the extending direction of the first current lead hole is superposed with the extending direction of the first current lead groove; the base body is also provided with a plurality of connecting holes which surround the hollow-out part and are axially arranged in a penetrating way. According to the framework structure provided by the invention, the gratings on the adjacent optical fibers are distributed in a staggered manner, so that the distributed measurement of the coil temperature can be realized.)

1. A skeleton structure for detecting quench signals of a high-temperature superconducting coil in real time is characterized by comprising more than two skeletons which are arranged in a stacking manner, wherein each skeleton comprises a cake-shaped matrix, and a hollow part is arranged in the center of the matrix; gaps are reserved between the base bodies of the adjacent frameworks;

the axial two sides of the base body are respectively provided with a first end face and a second end face, the first end face is provided with a first current lead groove which extends in the radial direction, the base body is also provided with a first current lead hole which penetrates through the base body in the radial direction, and the extending direction of the first current lead hole is overlapped with the extending direction of the first current lead groove;

the second end face is provided with optical fiber grating grooves which are arranged around the axis of the substrate and are internally provided with optical fiber grating sensor components, and the optical fiber grating grooves of the adjacent frameworks are mutually staggered;

the base body is also provided with a plurality of connecting holes which surround the hollow-out part and are axially arranged in a penetrating way.

2. The skeletal structure of claim 1, wherein the fiber grating sensor assembly comprises a transmission fiber, a metal fixation rod, a silver-plated fiber grating, and a bent capillary copper tube; the silver-plated fiber bragg grating is positioned in the capillary copper tube, two sides of the silver-plated fiber bragg grating are respectively connected with the metal fixing rod, and one side of the metal fixing rod is glued in the capillary copper tube, so that the silver-plated fiber bragg grating is sealed in the capillary copper tube.

3. The skeletal structure of claim 2, wherein one side of the metal retainer bar is glued within the capillary copper tube by a low temperature glue.

4. A carcass structure as claimed in claim 1, characterized in that said second end face has a boss portion disposed around the axis of said base, a side surface of said boss portion coinciding with a side of said hollowed-out portion.

5. A carcass structure as claimed in claim 4, characterized in that the boss portion has a second current lead groove running through the boss portion in the radial direction of the base body.

6. Skeletal structure as claimed in claim 4, characterized in that the boss part has a third current lead groove extending axially along the base body, which third current lead groove communicates with the first current lead groove.

7. The skeleton structure of any one of claims 1 to 6, wherein the base body has 6 of the connection holes, and the 6 connection holes are arranged at equal intervals to each other.

8. Skeletal structure in accordance with one of the claims 1 to 6, characterized in that the base body has on radial sides a pair of fourth current lead grooves, the first current lead hole being located at the bottom of the fourth current lead groove.

9. The armature structure of claim 8, further comprising an outer current lead wire engaged with the fourth current lead groove and an inner current lead wire engaged with the first current lead groove, the outer and inner current lead wires having second and third current lead holes, respectively, corresponding to the first current lead holes of the plurality of armatures and fourth and fifth current lead holes, respectively, corresponding to gaps between the armatures's bases.

10. The armature structure according to any one of claims 1 to 6, further comprising an outer current lead located on a side of the armature and an inner current lead fitted to the first current lead groove, the outer and inner current leads having second and third current lead holes corresponding to the first current lead holes of the plurality of armatures, respectively, and fourth and fifth current lead holes corresponding to gaps between bases of the armatures, respectively.

Technical Field

The invention relates to the technical field of high-temperature superconductivity and fiber grating sensing, in particular to a framework structure for detecting quench signals of a high-temperature superconductivity coil in real time.

Background

High-temperature superconducting materials are widely used in power equipment and high-intensity magnetic field magnets due to their zero resistance and high current-carrying characteristics in low-temperature environments, and core components of the power equipment and the magnets are high-temperature superconducting coils. After the high-temperature superconducting material is locally interfered by machinery, electromagnetism, heat and the like, irreversible transformation from a superconducting state to a normal state occurs, if the quench phenomenon of a coil cannot be detected in time, the quench of a magnet system is finally caused once the superconducting material is transmitted.

The fiber grating is applied to the aspect of quench detection of the high-temperature superconducting coil, and can fully exert the advantages of strong anti-electromagnetic interference capability, high sensitivity, small volume, easy embedding and the like. The fiber grating makes use of the photosensitive characteristic of the optical fiber, and makes the refractive index of the fiber core of the optical fiber periodically change along the optical fiber axis by methods of phase mask, point-by-point writing, holographic grating and the like, so that the fiber grating has selectivity on incident light waves, namely, only the waves meeting the specific wavelength condition are reflected back, and the light with the rest wavelengths is transmitted. When the temperature, strain and the like of the environment change, the refractive index of the fiber core of the optical fiber and the modulation period of the grating can be changed, and further the central wavelength of the Bragg grating reflected wave is changed. When the voltage signal of the superconducting coil is collected in real time, the temperature and strain changes of the superconducting coil can be obtained by monitoring the central wavelength change of the reflected light wave, and the purpose of detecting the quench signal of the superconducting coil is achieved.

The conventional quench detection methods are a voltage detection method and a temperature detection method. The voltage detection method judges whether the coil quenches by detecting voltage signals at two ends of the sample, and because the superconducting coil quenches the voltage signals, the superconducting coil is a nonlinear and non-stable weak signal, and is easily influenced by interference factors of instruments and experimental circuits in the acquisition process. In addition, for the superconducting coil, when the operating temperature of the coil is higher than the shunt temperature, a detectable signal appears, that is, for the quench, the change of the temperature signal is prior to the voltage signal, so compared with the temperature detection method, the voltage detection method has a certain delay, and therefore, the voltage detection method is not suitable for the quench detection of the superconducting coil. The conventional temperature detection method is generally based on the conventional electric temperature sensors such as a thermocouple and a thermal resistor, and is based on the measurement of an electric signal, and the magnetic field generated by the high-temperature superconducting coil causes the measured signal to be subjected to electromagnetic interference. Meanwhile, sensors such as a thermocouple and a thermal resistor are point measurement type sensors, a large number of sensors are needed to be used for realizing distributed temperature measurement of a magnet, each sensor is generally in a four-wire connection method, a large number of copper leads are needed, wiring also needs to occupy a large amount of space, and extra heat leakage problem is also introduced due to the use of the copper leads.

Disclosure of Invention

The embodiment of the invention provides a framework structure for detecting quench signals of a high-temperature superconducting coil in real time, which is used for solving the problem of inaccurate quench signal detection caused by coil electromagnetic interference and sensor arrangement in the traditional temperature detection method and realizing the real-time detection of quench signals of the superconducting coil temperature, strain and the like.

In order to achieve the purpose, the invention adopts the following technical scheme.

A skeleton structure for detecting quench signals of a high-temperature superconducting coil in real time comprises more than two skeletons which are arranged in a stacked mode, wherein each skeleton comprises a cake-shaped base body, and a hollow part is arranged in the center of each base body; gaps are arranged between the matrixes of the adjacent frameworks;

the axial two sides of the base body are respectively provided with a first end face and a second end face, the first end face is provided with a first current lead groove which extends in the radial direction, the base body is also provided with a first current lead hole which penetrates through the base body in the radial direction, and the extending direction of the first current lead hole is overlapped with the extending direction of the first current lead groove;

the second end surface is provided with optical fiber grating grooves which are arranged around the axis of the substrate and are internally provided with optical fiber grating sensor components, and the optical fiber grating grooves of adjacent frameworks are staggered with each other;

the base body is also provided with a plurality of connecting holes which surround the hollow-out part and are axially arranged in a penetrating way.

Preferably, the fiber grating sensor assembly comprises a transmission optical fiber, a metal fixing rod, a silver-plated fiber grating and a bent capillary copper pipe; the silver-plated fiber bragg grating is positioned in the capillary copper tube, two sides of the silver-plated fiber bragg grating are respectively connected with the metal fixing rods, and one side of each metal fixing rod is glued in the capillary copper tube, so that the silver-plated fiber bragg grating is sealed in the capillary copper tube.

Preferably, one side of the metal fixing rod is glued in the capillary copper tube through low-temperature glue.

Preferably, the second end face has a boss portion arranged around the base body axis, and a side surface of the boss portion coincides with a side surface of the cutout portion.

Preferably, the boss portion has a second current lead groove penetrating the boss portion in a radial direction of the base body.

Preferably, the boss portion has a third current lead groove extending axially along the base body, the third current lead groove being in communication with the first current lead groove.

Preferably, the base body has 6 connection holes, and the 6 connection holes are arranged at equal intervals from each other.

Preferably, the base body has a pair of fourth current lead grooves on both radial sides thereof, and the first current lead hole is located at a groove bottom of the fourth current lead groove.

Preferably, the bobbin structure further has an external current lead wire fitted to the fourth current lead groove, and an internal current lead wire fitted to the first current lead groove, the external current lead wire and the internal current lead wire having second current lead holes and third current lead holes, respectively, corresponding to the first current lead holes of the plurality of bobbins, and fourth current lead holes and fifth current lead holes, respectively, corresponding to gaps between the bases of the bobbins.

Preferably, the bobbin structure further has an external current lead located at a side of the bobbin, and an internal current lead engaged with the first current lead groove, the external current lead and the internal current lead having a second current lead hole and a third current lead hole corresponding to the first current lead holes of the plurality of bobbins, respectively, and a fourth current lead hole and a fifth current lead hole corresponding to a gap between the bases of the bobbins, respectively.

According to the technical scheme provided by the embodiment of the invention, the invention provides the skeleton structure for detecting the quench signal of the high-temperature superconducting coil in real time, which comprises at least two skeletons which are arranged in a stacking manner, wherein each skeleton comprises a cake-shaped substrate, the center of the substrate is provided with a hollow part, the two axial sides of the substrate are respectively provided with a first end face and a second end face, and the second end face is provided with an optical fiber grating groove; the optical fiber grating grooves are respectively arranged around the axis of the substrate, and the optical fiber grating grooves of adjacent frameworks are mutually staggered. The fiber grating groove is internally provided with a fiber grating sensor assembly. The first end face is provided with a first current lead groove which extends radially; the base body is also provided with a first current lead hole which radially penetrates through the base body, and the extending direction of the first current lead hole is superposed with the extending direction of the first current lead groove; the base body is also provided with a plurality of connecting holes which surround the hollow-out part and are axially arranged in a penetrating way. According to the framework structure provided by the invention, the grating layout on the adjacent optical fibers adopts staggered distribution, and the distributed measurement of the coil temperature can be realized through the staggered distribution mode of the grating.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic perspective view of a framework for detecting quench signals of a high-temperature superconducting coil in real time according to the present invention;

FIG. 2 is a schematic perspective view of another perspective view of a framework for detecting quench signals of a high temperature superconducting coil in real time according to the present invention;

FIG. 3 is a schematic structural diagram of a fiber grating sensor assembly of a framework for detecting quench signals of a high-temperature superconducting coil in real time according to the present invention;

FIG. 4 is a schematic perspective view of a skeleton structure for detecting quench signals of a high-temperature superconducting coil in real time according to the present invention;

FIG. 5 is a schematic diagram of the external current lead and the internal current lead of the skeleton structure for detecting quench signals of the high-temperature superconducting coil in real time according to the present invention;

FIG. 6 is a diagram of a prior art fiber grating arrangement for a high temperature superconducting coil former;

FIG. 7 is a diagram of a fiber grating layout of a framework for real-time detection of quench signals of a high-temperature superconducting coil according to the present invention.

In the figure:

11. the optical fiber grating comprises a base body 111, a first end face 112, a second end face 113, an optical fiber grating groove 115, a first current lead groove 116, a hollow-out part 117, a connecting hole 118 and a first current lead hole;

12. a boss portion 121, a second current lead groove 122, a third current lead groove;

131. a fourth current lead slot;

14. the transmission optical fiber 15, the metal fixing rod 16, the silver-plated fiber grating 17, the capillary copper tube 18 and the low-temperature glue;

21. external current lead 211, second current lead hole 212, fourth current lead hole;

22. internal current lead 221, third current lead hole 222, fifth current lead hole.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or coupled. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

For the convenience of understanding the embodiments of the present invention, the following description will be further explained by taking several specific embodiments as examples in conjunction with the drawings, and the embodiments are not to be construed as limiting the embodiments of the present invention.

Referring to fig. 1, the framework structure for detecting quench signals of a high-temperature superconducting coil in real time provided by the invention comprises at least two frameworks which are arranged in a stacking manner along the axis of the framework, each framework is provided with a cake-shaped (plate-shaped structure with a certain thickness) base body 11, and a hollow part 116 is arranged in the center of the base body 11, so that the base body 11 forms an annular structure. A certain gap is formed between the substrates of the adjacent frameworks. In this embodiment, the cross-sections of the base 11 on both sides in the axial direction are referred to as a first end surface 111 and a second end surface 112, and as shown in fig. 1, for example, the top surface of the base is referred to as the first end surface 111, and the bottom surface thereof is referred to as the second end surface 112. A fiber grating groove 113 is arranged on the second end face 112; the fiber grating groove 113 is disposed around the central axis of the substrate 11, and houses a fiber grating sensor assembly. In the present embodiment, the radial positions of the fiber grating grooves 113 of the adjacent bobbins are shifted from each other. The width and depth of the fiber grating groove 113 are properly designed according to the size of the fiber grating sensor assembly, so as to ensure the close contact between the framework and the coil.

The first end surface 111 or the second end surface 112 has a first current lead groove 115 arranged to extend radially, and the base body 11 further has a first current lead hole 118 arranged to penetrate radially, and both are used for arranging the current lead of the copper sheet of the superconducting coil, and the leading-in and leading-out positions of the current are selected according to the application. As shown in fig. 1 and 2, for example, a pair of first current lead grooves 115 are formed in the first end surface 111, and the extending direction of the first current lead holes 118 and the extending direction of the first current lead grooves 115 are overlapped with each other so as to be arranged symmetrically with respect to the central axis of the base body. The base body 11 also has a plurality of connecting holes 117, which are arranged around the cutout 116 and axially through the latter, for the mutual engagement of a plurality of ribs, which connecting holes 117 are preferably threaded holes, in the present embodiment 6 in number, arranged at equal distances (60 °) from one another.

In the embodiment provided by the present invention, the first end surface 111 and the second end surface 112 also function as the mounting end surface when a plurality of frameworks are combined on top of each other, and in some preferred embodiments, the first end surface 111 or the second end surface 112 has a boss portion 12 arranged around the axis of the base 11, and the boss portion 12 is provided along the edge of the hollow portion 116, and one side surface thereof coincides with the side surface of the hollow portion 116. The boss portion 12 is used for wiring of current leads in interconnection of the frameworks, and is provided on the first end surface 111 or the second end surface 112 according to actual needs, and an example is provided below, in which a first current lead groove 115 is provided on the first end surface 111 as the top surface of the base 11 as shown in fig. 1, and the boss portion 12 is provided on the second end surface 112 as the bottom surface of the base 11 as shown in fig. 2. The first current lead groove 115 and the hollow portion 116 are communicated with each other through a first current lead hole 118. Further, the boss portion 12 has a pair of second current lead grooves 121 penetrating the boss portion 12 in the radial direction of the base body 11 for lead-out wiring of the superconducting coil voltage lead. The side of the boss portion 12 also has a third current lead groove 122 extending axially along the base body 11, the third current lead groove 122 communicating with the first current lead groove 115 for lead-out arrangement of the current leads. The base body 11 has a pair of fourth current lead grooves 131 on both sides in the radial direction, and the first current lead hole 118 on the side of the base body 11 is located at the bottom of the fourth current lead grooves 131. In the present embodiment, the second, third and fourth current lead grooves 121, 122 and 131 have groove widths greater than the thickness of the current lead copper sheet. In the embodiment like that shown in fig. 2, when the second current lead groove 121 communicates with the connection hole 117, the groove width of the second current lead groove 121 also needs to reserve a margin for the test voltage lead welding and extraction. In addition, the first current lead hole 118 and the current lead copper sheet can be fixed to each other by a thread screw and a nut.

In the preferred embodiment provided by the present invention, the fiber grating sensor assembly comprises a transmission fiber 14, a metal fixing rod 15, a silver-plated fiber grating 16 and a micro-bent capillary copper tube 17. The silver-plated fiber bragg grating 16 is positioned in the capillary copper pipe 17, two sides of the silver-plated fiber bragg grating 16 are respectively connected with the metal fixing rods 15, one side of each metal fixing rod 15 is glued in the capillary copper pipe 17, so that the silver-plated fiber bragg grating 16 is sealed in the capillary copper pipe 17, the silver-plated fiber bragg grating 16 is not in contact with the micro-bent capillary copper pipe 17, and the chirp phenomenon caused by the non-uniform strain of epoxy resin glue when the fiber bragg grating sensor assembly is fixed on a coil can be avoided. In some preferred embodiments, the low-temperature glue 18 is filled between the metal fixing rod 15 and the capillary copper tube 17, and the metal fixing rod 15 can fix the low-temperature glue 18 at the end of the silver-plated fiber grating 16, so as to prevent the low-temperature glue 18 from flowing to affect the silver-plated fiber grating 16. In the preferred embodiment provided by the present invention, the temperature sensitivity of the silver-coated fiber grating 16 sensor is high enough to ensure the measurement requirements in the liquid nitrogen temperature range. The slightly bent capillary copper pipe 17 can enable the fiber grating sensor assembly to keep a loose slightly bent structure, so that the fiber grating sensor assembly is prevented from being influenced by external strain; the slightly bent capillary copper tube 17 has the same bending radius as the coil, so that the capillary copper tube can be more easily attached to the coil.

In the embodiment provided by the present invention, the framework structure further has an external current lead 21 located at the radial side of the framework and an internal current lead 22 matching with the first current lead groove 115, for example, as shown in the figure, the external current lead 21 is inserted into the fourth current lead groove 131, and the internal current lead 22 is inserted into the first current lead groove 115 and attached to the side adjacent to the hollow portion 116. As shown in fig. 5, the outer current lead 21 and the inner current lead 22 have a second current lead hole 211 and a third current lead hole 221 corresponding to the first current lead holes 118 of the plurality of bobbins, respectively, and a fourth current lead hole 212 and a fifth current lead hole 222 corresponding to a gap between the bases 11 of the bobbins, respectively. The second current lead hole 211 and the third current lead hole 221 are used for fixing the outer current lead 21 and the inner current lead 22, respectively, such as by passing through the first current lead hole 118, the second current lead hole 211 and the third current lead hole 221 by a screw nut of a harness screw machine. The fourth current lead hole 212 and the fifth current lead hole 222 are used for testing the arrangement of the power supply cable, for example, in the embodiment of fig. 5, the first end surface 111 of the bobbin is a top surface, the second end surface 112 is a bottom surface, the boss portion 12 is provided on the second end surface 112, the first end surface 111 of the lower bobbin is in contact with the boss portion 12 of the upper bobbin so that a gap is formed between the base bodies 11 of the two bobbins, and the fourth current lead hole 212 and the fifth current lead hole 222 correspond to the gap, respectively. In the present embodiment, the external current lead 21 and the internal current lead 22 are preferably formed by machining a copper sheet. In the embodiment provided by the present invention, the first fiber grating grooves 113 and the second fiber grating grooves 114 of each substrate 11 are staggered to form two rows of fiber grating grooves, so as to further form a staggered arrangement of the fiber grating sensor assemblies in the fiber grating grooves.

The skeleton structure, the function and the principle provided by the invention are as follows. The quench propagation speed of the high-temperature superconducting coil is very low, and heat is easy to accumulate at one point to burn the coil, so that when the quench occurs at a certain position of the superconducting coil, a sensor is required to quickly detect temperature change and feed back the temperature change to a protection system in time. The fiber grating sensor is a point measurement type sensor, and due to the limitation of the working principle and the manufacturing process, a certain interval, usually 8mm to 10mm, must be arranged between every two adjacent gratings, which means that distributed measurement of the coil temperature cannot be realized by only one optical fiber. It is assumed that the grating sensors in the upper half of the superconducting coil former are arranged as optical fibers 1 of fig. 6 and the grating sensors in the lower half are arranged as optical fibers 2 of fig. 5. In this arrangement, the gratings are in the same position on both the upper and lower portions of the backbone, with the gratings in sections 1a, 3a of fiber 1 and sections 5b, 7b of fiber 2, and the gratings in sections 2a, 4a of fiber 1 and sections 6b, 8b of fiber 2 being absent. When the quench time occurs at a certain position of the superconducting coil, the grating is arranged at the parts 1a, 3a, 5b and 7b to detect the temperature change at the position in time, and the grating is not arranged at the parts 2a, 4a, 6b and 8b to be a temperature detection blind zone, so that the temperature change at the position cannot be detected in time. Therefore, in order to avoid the temperature measurement blind zone and realize the coil temperature distributed detection, after the plurality of bobbins are axially connected to each other through the connection hole 117, as shown in fig. 7, the portions 1 'a and 3' a of the optical fiber 1 'and the portions 6' b and 8 'b of the optical fiber 2' have gratings, while the portions 2 'a and 4' a of the optical fiber 1 'and the portions 5' b and 7 'b of the optical fiber 2' have no gratings. When a quench occurs at a certain position of the superconducting coil, although the positions of the parts 2 'a and 4' a of the optical fiber 1 'and the positions of the parts 5' b and 7 'b of the optical fiber 2' are not provided with fiber grating sensors, the temperature cannot be measured, but the corresponding position on the other optical fiber can detect the temperature, and the temperature measuring dead zone is avoided. Therefore, the staggered arrangement mode of the fiber bragg grating sensors can realize distributed measurement of the temperature of the superconducting coil.

In summary, the skeleton structure for detecting quench signals of a high-temperature superconducting coil in real time provided by the invention comprises at least two skeletons which are arranged in a stacked manner, each skeleton comprises a cake-shaped substrate, a hollow part is arranged in the center of the substrate, a first end face and a second end face are respectively arranged at two axial sides of the substrate, and the second end face is provided with an optical fiber grating groove; the optical fiber grating grooves are respectively arranged around the axis of the substrate, and the optical fiber grating grooves of adjacent frameworks are mutually staggered. The fiber grating groove is internally provided with a fiber grating sensor assembly. The first end face is provided with a first current lead groove which extends radially; the base body is also provided with a first current lead hole which radially penetrates through the base body, and the extending direction of the first current lead hole is superposed with the extending direction of the first current lead groove; the base body is also provided with a plurality of connecting holes which surround the hollow-out part and are axially arranged in a penetrating way. The framework structure provided by the invention has the following advantages:

1. the fiber grating sensor is used for temperature measurement, is a wavelength demodulation sensor, is not influenced by light source intensity fluctuation, and is stable and reliable in measurement;

2. the combined high-temperature superconducting coil framework designed by the method can utilize the fiber bragg grating to monitor the temperature distribution and the quench condition of the high-temperature superconducting coil in real time;

3. in the method, through the flexible design of the superconducting current lead, the combination experiment of a single coil and a magnet can be skillfully carried out without re-welding the current lead inside and outside the coil;

4. according to the method, the capillary copper pipe for packaging the fiber bragg grating sensor is a micro-bending capillary copper pipe, and the bending radius of the copper pipe is the same as that of the coil, so that the copper pipe is easy to combine with the coil; the fiber bragg grating in the capillary also keeps a micro-bending structure, so that the influence of external strain on temperature measurement is avoided;

5. the grating layout on the adjacent optical fibers adopts staggered distribution, and the distributed measurement of the coil temperature can be realized through the staggered distribution mode of the gratings;

6. according to the method, the silver-plated fiber grating sensor is packaged and protected by the capillary copper pipe, so that the chirp phenomenon caused by non-uniform strain of the adhesive is avoided;

7. the superconducting coil winding device can be used for winding a single-pancake coil and a double-pancake coil, and is also suitable for winding a superconducting magnet through reasonable arrangement of current leads;

8. the coil wound by the framework of the invention is tested by cooling the superconducting material through conduction cooling, and the fiber grating sensor embedded in the framework is not in direct contact with liquid nitrogen, so that the problem of damage to the sensor caused by water drops generated after the liquid nitrogen volatilizes does not exist.

Those of ordinary skill in the art will understand that: the figures are merely schematic representations of one embodiment, and the blocks or flow diagrams in the figures are not necessarily required to practice the present invention.

From the above description of the embodiments, it is clear to those skilled in the art that the present invention can be implemented by software plus necessary general hardware platform. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which may be stored in a storage medium, such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method according to the embodiments or some parts of the embodiments.

The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for apparatus or system embodiments, since they are substantially similar to method embodiments, they are described in relative terms, as long as they are described in partial descriptions of method embodiments. The above-described embodiments of the apparatus and system are merely illustrative, and the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.