Distributed optical fiber embedded in superconducting magnet quench detection method

Abstract

Embodiments of the present invention relate to the field of optical fiber detection technology, and more specifically to a method for detecting a quench in a distributed optical fiber embedded in a superconducting magnet. The method comprises: embedding a first optical fiber and a second optical fiber in a superconducting magnet, wherein the first optical fiber and the second optical fiber have different dimensions, resulting in different temperature and strain sensitivity coefficients, and pre-calibrating the strain and temperature sensitivity coefficients in a low-temperature environment; using an optical fiber demodulator to collect optical fiber signals from the first optical fiber and the second optical fiber in real time, processing the two sets of collected signals through computer software to obtain temperature information and strain information of the superconducting magnet; determining whether a quench has occurred in the superconducting magnet and the location where the quench has occurred based on the temperature information; and after the quench has occurred, determining the cause of the quench based on the strain information. The present invention can detect continuous quench in a superconducting magnet, determine the specific quench location between turns of a superconducting magnet layer, and identify the cause of the quench in the superconducting magnet.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of optical fiber detection technology, and in particular to a method for detecting quench of a distributed optical fiber embedded in a superconducting magnet. Background Art

[0002] Superconducting magnets are complex structures and require complex fabrication processes. When operating in extreme multi-field environments such as extremely low temperatures, strong magnetic fields, and high currents, various instabilities, including electromagnetic effects, mechanical stress, and heat loss, can easily cause superconducting magnets to quench. Furthermore, high-temperature superconducting materials are ceramic composites with high heat capacity and stability margins, making the propagation of quenches in high-temperature superconducting magnets very slow. This makes it very easy for localized hot spots to form within the magnets, potentially burning them out. Therefore, a fast and effective quench detection, location, and identification system is required to make timely and accurate judgments about superconducting magnet quenches, providing key parameters for ensuring the healthy operation of superconducting magnets and their subsequent optimized design. Currently, distributed fiber optic sensors offer advantages such as small size, light weight, long detection distance, and resistance to electromagnetic interference. However, they have not yet been embedded between the turns of superconducting magnets, making it difficult to quickly and effectively detect quenches continuously, accurately locate the source of the quench, or help identify the primary cause of the quench. Summary of the Invention

[0003] In view of the above problems, embodiments of the present invention provide a distributed optical fiber embedded in a superconducting magnet quench detection method, which solves the problem that quench detection is difficult and unfavorable for optical fiber maintenance due to the inability to embed the optical fiber between the turns of the superconducting magnet, and the inability to quickly and effectively perform quench detection and accurately locate the quench source.

[0004] According to one aspect of an embodiment of the present invention, a method for detecting a quench in a distributed optical fiber embedded in a superconducting magnet is provided. The method comprises:

[0005] embedding a first optical fiber and a second optical fiber in a superconducting magnet, wherein the first optical fiber and the second optical fiber have different temperature sensitivity coefficients and strain sensitivity coefficients;

[0006] The optical fiber signals of the first optical fiber and the second optical fiber are collected in real time by using an optical fiber demodulator, and the optical fiber signals are measured and calculated to obtain temperature information and strain information of the superconducting magnet;

[0007] Whether a superconducting magnet quenches and the quench position are determined based on the temperature information, and the cause of the superconducting magnet quench is determined based on the strain information.

[0008] In an optional manner, embedding the first optical fiber and the second optical fiber in a superconducting magnet includes:

[0009] Connect one end of the first optical fiber and the second optical fiber to the optical fiber demodulator, open the optical fiber data acquisition software, adhere the other ends of the first optical fiber and the second optical fiber to the wire surface of the superconducting magnet, perform force calibration, and record the absolute position displayed by the optical fiber at the force calibration point as X0.

[0010] In an optional manner, embedding the first optical fiber and the second optical fiber in the superconducting magnet further includes:

[0011] After the first optical fiber and the second optical fiber are wound with the wire of the superconducting magnet into n layers of coils, which are recorded as Xn, and after the winding is completed, the first optical fiber and the second optical fiber are led out along the current lead of the superconducting magnet, and the superconducting magnet is cured and formed using epoxy resin.

[0012] In an optional manner, the collecting optical fiber signals of the first optical fiber and the second optical fiber in real time by using an optical fiber demodulator, and measuring the optical fiber signals to obtain temperature information and strain information of the superconducting magnet include:

[0013] Obtaining a first frequency signal Δν1, a first strain sensitivity coefficient Kε1, and a first temperature sensitivity coefficient KT1 of a first optical fiber;

[0014] Obtaining a second frequency signal Δν2, a second strain sensitivity coefficient Kε2, and a second temperature sensitivity coefficient KT2 of the second optical fiber;

[0015] Calculating temperature information and strain information according to the first frequency signal Δν1, the first strain sensitivity coefficient Kε1, the first temperature sensitivity coefficient KT1, the second frequency signal Δν2, the second strain sensitivity coefficient Kε2, and the second temperature sensitivity coefficient KT2;

[0016] The temperature information and strain information are output to the fiber optic data acquisition software.

[0017] In an optional manner, temperature information and strain information are calculated according to the first frequency signal Δν1, the first strain sensitivity coefficient Kε1, the first temperature sensitivity coefficient KT1, the second frequency signal Δν2, the second strain sensitivity coefficient Kε2, and the second temperature sensitivity coefficient KT2, using the following formula:

[0018]

[0019] Among them, Δε is the strain information and ΔT is the temperature information.

[0020] In an optional manner, determining whether a quench occurs in the superconducting magnet according to the temperature information includes:

[0021] Acquiring temperature information of the superconducting magnet when the superconducting magnet is first excited;

[0022] Determining whether the temperature information exceeds a preset quench temperature threshold, and if so, determining whether the temperature change rate exceeds a temperature change rate threshold, and if so, determining that the superconducting magnet is quenched;

[0023] Otherwise, no processing is performed and the temperature information continues to be monitored.

[0024] In an optional manner, the quench temperature threshold is obtained by the following steps:

[0025] A section of superconducting magnet sample was selected and an excitation test was performed after the superconducting magnet sample was cooled. A heater in the superconducting magnet sample was used to randomly trigger a quench, and the voltage and temperature signals at both ends of the superconducting magnet sample were monitored in real time. The temperature at which the measured voltage reached 1μV / cm was the quench temperature threshold. The ratio of the temperature change value before and after the quench was triggered to the time interval was the temperature change rate threshold.

[0026] In an optional manner, determining the quench position of the superconducting magnet according to the temperature information includes:

[0027] Temperature information is collected by optical fiber data acquisition software, and a Gaussian distribution chart is produced. When the temperature information of the superconducting magnet reaches the highest temperature value in the Gaussian distribution chart, the superconducting magnet position corresponding to the Gaussian distribution chart is queried as the quench position.

[0028] In an optional manner, determining the cause of the quench of the superconducting magnet based on the strain information includes obtaining quench strain information at the time of the quench, and comparing the quench strain information with normal strain information of a normal superconducting magnet to determine the cause of the quench.

[0029] In an optional manner, comparing the quench strain information with normal strain information of a normal superconducting magnet to determine the cause of the quench includes: if the quench strain information changes suddenly, determining that the quench is caused by structural damage of the superconducting magnet;

[0030] If the quench strain information has no sudden change and changes linearly, it is determined that the quench is caused by mechanical deformation of the superconducting magnet;

[0031] If the quench strain information does not change, it is determined that the quench is caused by heat loss of the superconducting magnet.

[0032] The present invention provides a distributed optical fiber embedded superconducting magnet quench detection method. The method comprises: embedding a first optical fiber and a second optical fiber in the superconducting magnet, wherein the first optical fiber and the second optical fiber have different dimensions, resulting in different temperature and strain sensitivity coefficients, and pre-calibrating the strain and temperature sensitivity coefficients in a low-temperature environment; using an optical fiber demodulator to collect optical fiber signals from the first optical fiber and the second optical fiber in real time, and processing the two sets of collected signals through computer software to obtain temperature information and strain information of the superconducting magnet; determining whether a quench has occurred in the superconducting magnet and the location where the quench has occurred based on the temperature information; and after a quench has occurred, determining the cause of the quench based on the strain information. The present invention can detect continuous quench in the superconducting magnet, determine the specific quench location between turns of the superconducting magnet layer, and identify the cause of the quench in the superconducting magnet.

[0033] The above description is only an overview of the technical solutions of the embodiments of the present invention. In order to more clearly understand the technical means of the embodiments of the present invention, they can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the embodiments of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are specifically listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings are only used to illustrate the embodiments and are not to be considered as limiting the present invention. In addition, the same reference symbols are used to represent the same components throughout the drawings. In the drawings:

[0035] Figure 1 A schematic flow chart of a first embodiment of a distributed optical fiber embedded superconducting magnet quench detection method provided by the present invention is shown;

[0036] Figure 2 A schematic diagram showing the position calibration of the first optical fiber and the second optical fiber in front of the superconducting magnet of the present invention is shown;

[0037] Figure 3 A schematic diagram showing the inter-turn structure of the first optical fiber and the second optical fiber superconducting magnet layers of the present invention is shown;

[0038] Figure 4 shows a quench detection logic flow chart of the present invention;

[0039] Figure 5 A schematic diagram of a method for determining the quench threshold of a superconducting magnet according to the present invention is shown;

[0040] Figure 6 shows a schematic diagram of quench positioning of the present invention;

[0041] Figure 7 A schematic diagram of the quench cause judgment logic of the present invention is shown. DETAILED DESCRIPTION

[0042] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein.

[0043] Example 1,

[0044] Figure 1-6 A first embodiment of a distributed optical fiber embedded in a superconducting magnet quench detection method of the present invention is shown. The method comprises:

[0045] 101. Embedding a first optical fiber and a second optical fiber into a superconducting magnet, wherein the first optical fiber and the second optical fiber have different temperature sensitivity coefficients and strain sensitivity coefficients. In step 101, embedding the first optical fiber and the second optical fiber into the superconducting magnet comprises: connecting one end of the first optical fiber and the second optical fiber to an optical fiber demodulator, opening optical fiber data acquisition software, bonding the other ends of the first optical fiber and the second optical fiber to the surface of the superconducting magnet wire, performing force calibration, and recording the absolute position displayed by the optical fiber at the force calibration point as X0; wherein the first optical fiber is passed through a metal capillary and then bonded to the surface of the superconducting magnet wire. Embedding the first optical fiber and the second optical fiber into the superconducting magnet further comprises: winding the first optical fiber and the second optical fiber with the superconducting magnet wire into n layers of coils, recording the coils as Xn, and after the winding is completed, leading the first optical fiber and the second optical fiber out along the current lead of the superconducting magnet, and curing the superconducting magnet with epoxy resin.

[0046] 102. The optical fiber signals of the first optical fiber and the second optical fiber are collected in real time by an optical fiber demodulator, and the optical fiber signals are measured to obtain the temperature information and strain information of the superconducting magnet. In step 102, the optical fiber signals of the first optical fiber and the second optical fiber are collected in real time by an optical fiber demodulator, and the optical fiber signals are measured to obtain the temperature information and strain information of the superconducting magnet, including: obtaining the first frequency signal Δν1, the first strain sensitivity coefficient Kε1, and the first temperature sensitivity coefficient KT1 of the first optical fiber; obtaining the second frequency signal Δν2, the second strain sensitivity coefficient Kε2, and the second temperature sensitivity coefficient KT2 of the second optical fiber; calculating the temperature information and strain information according to the first frequency signal Δν1, the first strain sensitivity coefficient Kε1, the first temperature sensitivity coefficient KT1, the second frequency signal Δν2, the second strain sensitivity coefficient Kε2, and the second temperature sensitivity coefficient KT2; and outputting the temperature information and strain information to the optical fiber data acquisition software.

[0047] 103. Determine whether a superconducting magnet has quenched and the quench location based on the temperature information, and determine the cause of the superconducting magnet quench based on the strain information. In step 103, determining whether a superconducting magnet has quenched based on the temperature information includes: obtaining temperature information of the superconducting magnet at the start of excitation; determining whether the temperature information exceeds a preset quench temperature threshold; if so, determining whether the temperature change rate exceeds the temperature change rate threshold; if so, determining that the superconducting magnet has quenched; otherwise, no processing is performed and the temperature information is continuously monitored. Determining the superconducting magnet quench location based on the temperature information includes: collecting temperature information using fiber optic data acquisition software and creating a Gaussian distribution chart. When the superconducting magnet temperature information reaches the highest temperature value in the Gaussian distribution chart, querying the Gaussian distribution chart to identify the superconducting magnet position corresponding to the quench location. Determining the cause of the superconducting magnet quench based on the strain information includes: obtaining quench strain information at the time of the quench, and comparing the quench strain information with normal strain information of a normal superconducting magnet to determine the cause of the quench. The quench strain information is compared with the normal strain information of a normal superconducting magnet to determine the cause of the quench. If the quench strain information changes suddenly, it is determined that the quench is caused by structural damage of the superconducting magnet; if the quench strain information does not change suddenly and changes linearly, it is determined that the quench is caused by mechanical deformation of the superconducting magnet; if the quench strain information does not change, it is determined that the quench is caused by thermal loss of the superconducting magnet.

[0048] An embodiment of the present invention provides a distributed optical fiber embedded superconducting magnet quench detection method. The method comprises: embedding a first optical fiber and a second optical fiber in the superconducting magnet, wherein the first optical fiber is sensitive to temperature, and the second optical fiber is sensitive to a mixed signal of temperature and strain; using an optical fiber demodulator to collect optical fiber signals from the first and second optical fibers in real time, and measuring the optical fiber signals to obtain temperature and strain information of the superconducting magnet; determining whether a quench has occurred in the superconducting magnet and the quench location based on the temperature information, and determining the cause of the quench based on the strain information. The present invention can detect continuous quenches in superconducting magnets, determine the specific quench location between turns of superconducting magnet layers, and identify the cause of the quench in the superconducting magnet. This method enables rapid and efficient quench detection and accurate location of the quench source.

[0049] Example 2,

[0050] Based on the above embodiment 1, see Figure 2-3 In this embodiment, a first optical fiber and a second optical fiber are embedded in a superconducting magnet, wherein the first optical fiber and the second optical fiber have different temperature sensitivity coefficients and strain sensitivity coefficients. Specifically, the first optical fiber and the second optical fiber can be optical frequency domain scatterometers, and the two optical frequency domain scatterometers are embedded in the superconducting magnet, and the positions of the first optical fiber and the second optical fiber are calibrated; wherein the superconducting magnet can be a YBCO superconducting magnet;

[0051] In one implementation of this embodiment, two identical optical frequency domain scatterometers are embedded within a superconducting magnet. One optical frequency domain scatterometer, or the first optical fiber, is pre-threaded into the superconducting magnet's metal capillary and is sensitive only to temperature signals. The other optical frequency domain scatterometer, or the second optical fiber, is directly bonded to the surface of the superconducting magnet's wire and is sensitive to both applied temperature and strain signals. Furthermore, the two optical frequency domain scatterometers can have different temperature and strain sensitivities. Subsequently, the first optical fiber with the metal capillary is also bonded to the surface of the superconducting wire / material. One end of each optical frequency domain scatterometer is connected to a demodulator, and monitoring software is activated on a computer. The force applied to the other end of the optical frequency domain scatterometer bonded to the superconducting magnet's wire is then calibrated, and the optical fiber monitoring software records the position of the optical fiber at that point as the origin X0. Two optical frequency domain scatterometers are embedded between turns of the superconducting magnet. After the first layer / turn of the superconducting magnet wire is wound, the optical fiber bonded to the surface is recorded using fiber monitoring software as X1. Following this method, the corresponding end positions of the embedded optical fiber for the second, third, fourth, and nth layers / turns are calibrated as X2, X3, X4, and so on. Once the superconducting magnet is wound, the optical fiber transmission lines of the two optical frequency domain scatterometers are led out along the current leads of the superconducting magnet wire, and the optical frequency domain scatterometers are naturally embedded between the turns of the superconducting magnet. Finally, epoxy resin is used to cure the superconducting magnet.

[0052] Example 3,

[0053] Based on the above embodiment 1, see Figure 4 , using an optical fiber demodulator to collect optical fiber signals of the first optical fiber and the second optical fiber in real time, and measuring the optical fiber signals to obtain temperature information and strain information of the superconducting magnet, including: obtaining a first frequency signal Δν1, a first strain sensitivity coefficient Kε1, and a first temperature sensitivity coefficient KT1 of the first optical fiber; obtaining a second frequency signal Δν2, a second strain sensitivity coefficient Kε2, and a second temperature sensitivity coefficient KT2 of the second optical fiber; calculating temperature information and strain information according to the first frequency signal Δν1, the first strain sensitivity coefficient Kε1, the first temperature sensitivity coefficient KT1, the second frequency signal Δν2, the second strain sensitivity coefficient Kε2, and the second temperature sensitivity coefficient KT2; and outputting the temperature information and strain information to optical fiber data acquisition software.

[0054] The temperature information and strain information are calculated according to the first frequency signal Δν1, the first strain sensitivity coefficient Kε1, the first temperature sensitivity coefficient KT1, the second frequency signal Δν2, the second strain sensitivity coefficient Kε2, and the second temperature sensitivity coefficient KT2, using the following formula:

[0055]

[0056] Among them, Δε is the strain information and ΔT is the temperature information.

[0057] Example 4,

[0058] Based on the above-mentioned embodiment 1 or 3, this embodiment specifically determines whether a superconducting magnet has quenched based on temperature information, including: obtaining the temperature information of the superconducting magnet at the start of excitation; determining whether the temperature information exceeds a preset quench temperature threshold, and if so, determining whether the temperature change rate exceeds the temperature change rate threshold, and if so, determining that the superconducting magnet has quenched; otherwise, no processing is performed and the temperature information is continued to be monitored. Specifically, the optical frequency domain scatterometer is embedded in the quench detection logic between the turns of the superconducting magnet, including: turning on the optical fiber demodulator and the computer, collecting data in real time and providing them to the computer for calculation and processing, and calculating the temperature value (T op ), the measured temperature signal is used as the quench detection signal. When the measured temperature signal exceeds the quench threshold of the superconducting magnet (T op ≥T c ), and then calculate the temperature change rate of the superconducting magnet from the initial temperature at the beginning of excitation to the quench threshold When both the measured temperature value and the temperature change rate exceed the quench threshold It can be considered that the YBCO superconducting magnet has quenched.

[0059] In one implementation of the above embodiment, see Figure 5 Determining the superconducting magnet quench threshold involves selecting a short superconducting magnet test sample, subjecting it to the same cooling method, and conducting an excitation test. Using a heater on the sample, the sample is randomly triggered to quench, and the voltage and temperature signals across the superconducting magnet sample are monitored in real time. The temperature at which the measured voltage reaches 1μV / cm is the temperature quench threshold. The ratio of the temperature change before and after the quench is triggered to the time interval is the temperature change rate threshold.

[0060] In an alternative approach, see Figure 6The optical frequency domain scatterometer is embedded in the turns of a superconducting magnet layer to locate the quench, including: when the superconducting magnet quenches, the temperature value measured by the optical frequency domain scatterometer shows a sharp upward trend after the quench, then drops sharply after reaching a maximum value, and gradually recovers to the initial excitation temperature, that is, when it presents a Gaussian distribution, the corresponding optical fiber position is the location where the superconducting magnet first quenches. The quench position of the superconducting magnet is determined based on the temperature information, including: collecting temperature information through optical fiber data acquisition software and creating a Gaussian distribution chart. When the temperature information of the superconducting magnet reaches the highest temperature value in the Gaussian distribution chart, the superconducting magnet position corresponding to the Gaussian distribution chart is found to be the quench position. Specifically, after the superconducting magnet quenches, the absolute position of the optical fiber at the absolute position of the optical fiber is calculated to show that the first temperature signal curve of the superconducting magnet first rises above the critical temperature and then returns to the original temperature, that is, when it presents a Gaussian distribution, the absolute position recorded by the optical fiber at this point is the location where the quench first occurs. Assume that the absolute position of the optical fiber at this point is m, and m is the highest point of the Gaussian distribution. When the value of m is between X0 and X1, the quench can be determined to be at the first turn of the superconducting magnet. When the value of m is between X1 and X2, the quench can be determined to be at the second turn of the superconducting magnet. By analogy, when the value of m is between Xn-1 and Xn, the quench can be determined to be at the nth turn of the superconducting magnet.

[0061] In an alternative approach, see Figure 7 Determining the cause of a superconducting magnet quench based on strain information includes obtaining quench strain information at the time of the quench and comparing the quench strain information with normal strain information of a normal superconducting magnet to determine the cause of the quench. Comparing the quench strain information with normal strain information of a normal superconducting magnet to determine the cause of the quench includes: if the quench strain information changes abruptly, determining that the quench is caused by structural damage to the superconducting magnet; if the quench strain information does not change abruptly and changes linearly, determining that the quench is caused by mechanical deformation of the superconducting magnet; and if the quench strain information does not change, determining that the quench is caused by thermal loss of the superconducting magnet. Specifically, during the cooling process of the superconducting magnet, the signal change curves of the embedded first optical fiber and the embedded second optical fiber are recorded. When the superconducting magnet is excited and a quench occurs, the difference between the signal change curves of the embedded first optical fiber and the embedded second optical fiber recorded by the optical fiber and the optical fiber signal during the cooling process is the signal caused by the mechanical strain of the superconducting magnet. If the measured mechanical strain information suddenly changes during the excitation quench, the quench is determined to be caused by structural damage to the superconducting magnet. If the measured mechanical strain information does not suddenly change and changes linearly, the quench is determined to be caused by mechanical deformation of the superconducting magnet. If the measured mechanical strain information does not change, the quench is determined to be caused by heat loss in the superconducting magnet.

[0062] The algorithms or displays provided herein are not inherently related to any particular computer, virtual system or other device. In addition, the embodiments of the present invention are not directed to any particular programming language.

[0063] In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the present invention may be practiced without these specific details. Similarly, in order to streamline the present invention and aid in understanding one or more of the various inventive aspects, in the above description of exemplary embodiments of the present invention, various features of embodiments of the present invention are sometimes grouped together into a single embodiment, figure, or description thereof. The claims that follow the detailed description are hereby expressly incorporated into that detailed description, with each claim itself serving as a separate embodiment of the present invention.

[0064] Those skilled in the art will appreciate that the modules in the devices of the embodiments can be adaptively changed and installed in one or more devices different from the embodiments. The modules, units, or components in the embodiments can be combined into one module, unit, or component, and furthermore, they can be divided into multiple submodules, subunits, or subcomponents. Except that at least some of such features and / or processes or units are mutually exclusive.

[0065] It should be noted that the above embodiments illustrate rather than limit the invention, and that alternative embodiments may be devised by a person skilled in the art without departing from the scope of the appended claims. In the claims, any reference signs placed between brackets should not be construed as limiting the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present invention may be implemented by means of hardware comprising several different elements and by means of appropriately programmed computers. In a unit claim enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third etc. does not indicate any order. These words may be interpreted as names. The steps in the above embodiments should not be understood as limiting the order of execution unless otherwise specified.

Claims

1. A distributed optical fiber embedded superconducting magnet quench detection method, characterized in that: The method comprises: embedding a first optical fiber and a second optical fiber in a superconducting magnet, wherein the first optical fiber and the second optical fiber have different temperature sensitivity coefficients and strain sensitivity coefficients; The optical fiber signals of the first optical fiber and the second optical fiber are collected in real time by using an optical fiber demodulator, and the optical fiber signals are measured and calculated to obtain temperature information and strain information of the superconducting magnet; determining whether a superconducting magnet has quenched and the quench location based on the temperature information, and determining the cause of the superconducting magnet quench based on the strain information; The embedding of the first optical fiber and the second optical fiber into the superconducting magnet comprises: connecting one end of the first optical fiber and the second optical fiber to the optical fiber demodulator, opening optical fiber data acquisition software, bonding the other ends of the first optical fiber and the second optical fiber to the surface of the wire of the superconducting magnet, performing force calibration, and recording the absolute position displayed by the optical fiber at the force calibration location as X0, wherein the first optical fiber is pre-inserted into the metal capillary of the superconducting magnet to obtain temperature information of the superconducting magnet, and the second optical fiber is bonded to the surface of the wire of the superconducting magnet to obtain temperature information and strain information of the superconducting magnet; The embedding of the first optical fiber and the second optical fiber into the superconducting magnet further includes: winding the first optical fiber and the second optical fiber with the wire of the superconducting magnet into n layers of coils, which are recorded as Xn; and after the winding is completed, leading the first optical fiber and the second optical fiber out along the current lead of the superconducting magnet, and curing the superconducting magnet with epoxy resin; Determining a quench position of a superconducting magnet according to the temperature information includes: Temperature information is collected using fiber optic data acquisition software, and a Gaussian distribution chart is created. When the temperature information of the superconducting magnet reaches the highest temperature value in the Gaussian distribution chart, the superconducting magnet position corresponding to the Gaussian distribution chart is quenched. When the quench position m is between Xn-1 and Xn, the quench position of the superconducting magnet is determined to be the nth turn.

2. A distributed optical fiber embedded superconducting magnet quench detection method according to claim 1, characterized in that: Determining whether a quench occurs in the superconducting magnet based on the temperature information includes: Acquiring temperature information of the superconducting magnet when the superconducting magnet is first excited; Determining whether the temperature information exceeds a preset quench temperature threshold, and if so, determining whether the temperature change rate exceeds a temperature change rate threshold, and if so, determining that the superconducting magnet is quenched; Otherwise, no processing is performed and the temperature information continues to be monitored.

3. A distributed optical fiber embedded superconducting magnet quench detection method according to claim 2, characterized in that: The quench temperature threshold is obtained by the following steps: A section of superconducting magnet sample was selected and an excitation test was performed after the superconducting magnet sample was cooled. A heater in the superconducting magnet sample was used to randomly trigger a quench, and the voltage and temperature signals at both ends of the superconducting magnet sample were monitored in real time. The temperature at which the measured voltage reached 1μV / cm was the quench temperature threshold. The ratio of the temperature change value before and after the quench was triggered to the time interval was the temperature change rate threshold.

4. The method for detecting quench of a distributed optical fiber embedded in a superconducting magnet according to claim 1, wherein: Determining the cause of the quench of the superconducting magnet based on the strain information includes obtaining quench strain information at the time of the quench, and comparing the quench strain information with normal strain information of a normal superconducting magnet to determine the cause of the quench.

5. A distributed optical fiber embedded superconducting magnet quench detection method according to claim 4, characterized in that: The comparing the quench strain information with normal strain information of a normal superconducting magnet to determine the cause of the quench includes: If the quench strain information changes suddenly, it is determined that the quench is caused by structural damage of the superconducting magnet; If the quench strain information has no sudden change and changes linearly, it is determined that the quench is caused by mechanical deformation of the superconducting magnet; If the quench strain information does not change, it is determined that the quench is caused by heat loss of the superconducting magnet.

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