Anti-vibration fluorescent optical fiber temperature sensor probe, preparation method and temperature measurement system

Abstract

The invention provides an anti-vibration fluorescent optical fiber temperature sensor probe, a preparation method and a temperature measurement system, the temperature sensor probe comprises a three-stage composite structure from inside to outside, the inner layer is a fluorescent optical fiber wrapped by a protection tube, and the protection tube is filled with cured optical cement to form an optical coupling layer; the middle layer is a tensile mechanical enhancement layer, and the tensile mechanical enhancement layer is formed by spirally winding tensile metal wires; the outer layer is a mechanical buffer layer, and the mechanical buffer layer comprises a stainless steel corrugated pipe and an elastic buffer material filled in the stainless steel corrugated pipe; and the three-layer structure of the inner layer, the middle layer and the outer layer forms a metalized sealing structure at the end part. According to the temperature sensor probe, a three-stage buffer structure is adopted to realize anti-vibration performance, vibration energy absorption efficiency is remarkably improved, optical signals are kept highly stable in a broadband vibration environment, extreme tension can be borne, mechanical reliability is improved, and temperature measurement precision is improved.

Description

Technical Field

[0001] This application relates to the field of fiber optic temperature sensing, specifically to a vibration-resistant fluorescent fiber optic temperature sensor probe, its preparation method, and a temperature measurement system. Background Technology

[0002] Temperature monitoring is crucial in medical treatment, transportation, high-energy magnetic fields, and daily life. Fluorescent fiber optic temperature sensors, as a novel sensing technology, are gradually becoming an ideal choice for environmental temperature monitoring due to their advantages such as no electromagnetic interference, radiation resistance, small size, high temperature resistance, and corrosion resistance. The principle behind temperature measurement using fluorescent fiber optic temperature sensors is as follows: when a fluorescent material is excited by light, it emits excitation light of a specific wavelength. After the excitation stops, the fluorescence emission phenomenon continues for a period of time. Fluorescence lifetime refers to the decay time constant of fluorescence that decays exponentially. Within a certain temperature range, the fluorescence lifetime of a luminescent material exhibits a temperature dependence, decreasing monotonically with increasing temperature. Based on this correlation, fluorescent fiber optic temperature sensors have been developed for temperature measurement.

[0003] However, the fluorescence signals transmitted by existing fluorescent fiber optic temperature sensors are generally very weak and easily interfered with by signal noise under mechanical vibration, leading to a decrease in temperature measurement accuracy. In 2016, Northeastern University proposed a small fluorescent fiber optic temperature sensor. However, traditional small fluorescent fiber optic temperature sensors are susceptible to noise introduced by mechanical disturbances, resulting in reduced temperature measurement accuracy in complex temperature measurement environments and a tendency for malfunctions such as fluorescent material shedding. Therefore, the development of a vibration-resistant composite buffered fluorescent fiber optic temperature probe is of great significance.

[0004] A search revealed a patent with publication number CN 101825503 A, which discloses a fluorescent fiber optic temperature sensor probe and its fabrication method. This probe includes a light-transmitting fiber, one end of which is fixed in a connector using epoxy resin, and the other end is housed in a protective sleeve. A reflective resin layer is disposed on the end face of the fiber within the protective sleeve, and a fluorescent layer is disposed on the reflective resin layer. The protective sleeve and the connector are sealed together using epoxy resin. This fiber optic probe has advantages such as simple structure, small size, light weight, high measurement accuracy, large measurement range, good repeatability, long service life, and resistance to chemical corrosion and electromagnetic interference. However, it still has shortcomings in vibration resistance, and the aforementioned problem of reduced temperature measurement accuracy in complex temperature measurement environments such as mechanical vibration persists. Summary of the Invention

[0005] In view of the deficiencies in the prior art, the purpose of this application is to provide a vibration-resistant fluorescent fiber optic temperature sensor probe, its preparation method, and a temperature measurement system.

[0006] A first aspect of this application provides a vibration-resistant fluorescent fiber optic temperature sensor probe, the temperature sensor probe comprising a three-level composite structure from the inside out, wherein: The inner layer is a fluorescent optical fiber wrapped in a protective tube, and the protective tube is filled with cured optical adhesive to form an optical coupling layer; The middle layer is a tensile mechanical reinforcement layer, which is formed by spirally winding tensile metal wires; The outer layer is a mechanical buffer layer, which includes a stainless steel corrugated pipe and an elastic buffer material filled inside it; The three-layer structure of the inner layer, the middle layer, and the outer layer forms a metallized sealing structure at the ends.

[0007] Optionally, the fluorescent material is coated on the end of the fluorescent optical fiber to form a fluorescent sensitive layer with a thickness of 10-50 μm.

[0008] Optionally, the protective tube may be either a polyimide protective tube or a PVC protective tube.

[0009] Optionally, the filling rate of the cured optical adhesive is not less than 95%; the cured optical adhesive has a bubble-free optical interface, which is any one of PMMA, optical grade polyurethane and epoxy acrylate.

[0010] Optionally, the diameter of the tensile metal wire is 0.3 mm, the winding angle is 30°-60°, and the winding density is 30-35 turns / cm; the tensile metal wire is any one of silver-plated bulletproof wire, nickel-plated copper alloy wire, and titanium alloy wire.

[0011] Optionally, the filling thickness of the elastic cushioning material is 60%-80% of the difference between the inner diameter of the stainless steel corrugated pipe and the outer diameter of the tensile mechanical reinforcement layer; the elastic cushioning material is any one of silicone rubber foam, modified polyurethane foam and PDMS foam.

[0012] Optionally, a metallized seal can be formed at both ends of the temperature sensor probe by laser welding.

[0013] A second aspect of this application provides a method for fabricating the above-mentioned vibration-resistant fluorescent fiber optic temperature sensor probe, comprising: The fluorescent optical fiber coated with fluorescent material is pre-threaded into the protective tube; Pretreated optical adhesive is injected into the gap between the protective tube and the fluorescent optical fiber; After the optical adhesive has cured, tensile metal wire is spirally wound around the outside of the protective tube at a set angle; A stainless steel corrugated tube is sleeved on the outside of the tensile metal wire, and an elastic cushioning material is filled inside the stainless steel corrugated tube. Welding seals both ends of the sensor probe to obtain a vibration-resistant fluorescent fiber optic temperature sensor probe.

[0014] Optionally, the pretreated optical adhesive is injected into the gap between the protective tube and the fluorescent optical fiber, wherein the pretreated optical adhesive undergoes degassing treatment and viscosity adjustment, and the filling rate of the pretreated optical adhesive in the gap is ≥95%.

[0015] A third aspect of this application provides a temperature measurement system comprising the aforementioned vibration-resistant fluorescent fiber optic temperature sensor probe.

[0016] The temperature measurement system includes an optical path coupling system adapted to different fluorescent materials, which includes an optical path fixture, a filter, a coupling lens, an excitation source (i.e., an excitation light source), and a photoelectric conversion device; as well as a signal demodulation circuit and a host computer responsible for processing the fluorescent signal.

[0017] Optionally, the optical path coupling system has an optical path clamp with three ports, which are respectively connected to the optical fiber, the excitation light source, and the photoelectric conversion device. A filter and a coupling lens are provided in the optical path clamp.

[0018] Optionally, one end of the optical fiber is connected to the optical path coupling system via an ST-type, LC-type, SC-type, or FC-type optical fiber connector.

[0019] Optionally, the optical path fixture has a shape of 3. 2.8 A 1.5cm cuboid.

[0020] Optionally, the filter is a narrowband filter with a thickness of 0.5mm-1mm.

[0021] Optionally, the signal demodulation circuit of the fluorescence signal is connected to the excitation source and photoelectric conversion device of the optical path coupling system.

[0022] Optionally, the host computer communicates with the signal demodulation circuit of the fluorescence signal.

[0023] The vibration-resistant fluorescent fiber optic temperature sensor probe provided in this application adopts a three-level buffer structure to achieve vibration resistance, significantly improves vibration energy absorption efficiency, maintains high stability of optical signal in a wide frequency vibration environment, and can withstand extreme tension to improve mechanical reliability. It solves the pain point of traditional probes being susceptible to mechanical interference, greatly reduces the impact of environmental factors on measurement results, improves temperature measurement accuracy, and significantly reduces the failure rate of the sensor under harsh working conditions such as vibration and radiation, and significantly extends its service life compared with traditional products.

[0024] Other technical effects resulting from the additional features will be further illustrated in the corresponding embodiments. Attached Figure Description

[0025] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the structure of a vibration-resistant fluorescent fiber optic temperature sensor probe according to an exemplary embodiment; Figure 2 This is a flowchart illustrating a method for fabricating a vibration-resistant fluorescent fiber optic temperature sensor probe according to an exemplary embodiment. Figure 3 This is a schematic flowchart illustrating a method for fabricating a vibration-resistant fluorescent fiber optic temperature sensor probe according to an exemplary embodiment. Figure 4 This study compares the temperature measurement capabilities of a vibration-resistant fluorescent fiber optic temperature sensor probe and a conventional fluorescent fiber optic temperature probe under vibration conditions.

[0026] In the diagram: 1 is fluorescent optical fiber, 2 is cured optical adhesive, 3 is protective tube, 4 is tensile mechanical reinforcement layer, 5 is elastic buffer material, 6 is stainless steel corrugated pipe, and 7 is fluorescent material. Detailed Implementation

[0027] The present application will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present application, but do not limit the present application in any way. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present application, and these all fall within the protection scope of the present application. Parts not described in detail in the following embodiments can be implemented using existing technology.

[0028] Existing fluorescent fiber optic temperature probes suffer from high failure rates under strong mechanical vibration environments, are prone to signal noise, and lead to decreased temperature measurement accuracy. To address these issues, this application provides a vibration-resistant fluorescent fiber optic temperature sensor probe.

[0029] Reference Figure 1 As shown, in one embodiment of this application, the vibration-resistant fluorescent fiber optic temperature sensor probe includes a three-level composite structure from the inside out, wherein: the inner layer is a fluorescent fiber 1 wrapped in a protective tube 3, the fluorescent fiber 1 is coated with fluorescent material 7, and the protective tube 3 is filled with cured optical adhesive 2 to form an optical coupling layer; the middle layer is a tensile mechanical reinforcement layer 4, which is formed by spirally winding tensile metal wire; the outer layer is a mechanical buffer layer, which includes a stainless steel corrugated tube 6 and an elastic buffer material 5 filled inside it; the three-layer structure of inner, middle and outer layers forms a metallized sealing structure at the ends.

[0030] Specifically, this vibration-resistant composite buffered fluorescent fiber optic temperature sensor probe achieves enhanced vibration resistance through a three-level synergistic protection mechanism and optimized material-structure design. Specifically: an optical coupling buffer structure is formed by the inner protective tube 3 and optical adhesive, absorbing high-frequency micro-vibrations and stabilizing optical signal transmission; a tensile mechanical reinforcement layer 4 composed of wound metal wires in the middle layer resists axial tensile stress and transverse shear force, reducing displacement under fiber vibration; and a mechanical buffer layer composed of an outer stainless steel corrugated tube 6 and elastic buffer material 5, combined with a sealing structure, absorbs low-frequency, large-amplitude vibrations and isolates environmental interference.

[0031] The embodiments described above employ a three-level buffer structure to achieve vibration resistance, significantly improving vibration energy absorption efficiency, maintaining high stability of the optical signal under wide-frequency vibration environments, and withstanding extreme tensile forces to enhance mechanical reliability. This solves the problem of traditional probes being susceptible to mechanical interference, greatly reduces the impact of environmental factors on measurement results, improves temperature measurement accuracy, and significantly reduces the failure rate of the sensor under harsh conditions such as vibration and radiation, resulting in a significantly longer service life compared to traditional products.

[0032] In order to accurately, efficiently and stably convert temperature into light signals and thus measure temperature through fluorescent optical signals, in some specific embodiments of this application, fluorescent material 7 is coated on the end of fluorescent optical fiber 1 to form a fluorescent sensitive layer with a thickness of 10-50 μm. This thickness of fluorescent sensitive layer can ensure sufficient fluorescence emission and avoid slow temperature transmission and slow response caused by an excessively thick fluorescent sensitive layer.

[0033] Specifically, the luminescent properties of fluorescent material 7 (such as intensity, lifetime, and wavelength) change with temperature. By measuring the changes in these parameters, the ambient temperature can be accurately determined. The end is the part of the probe that is directly exposed to the environment at the temperature to be measured.

[0034] For example, fluorescent optical fiber 1 is a plastic optical fiber or a quartz optical fiber.

[0035] In order to improve the shock absorption effect of the inner optical coupling layer, in some specific embodiments of this application, the protective tube 3 is a flexible polymer protective tube, such as a polyimide protective tube or a PVC protective tube, to absorb high-frequency vibration and protect the probe from external impact.

[0036] In order to improve the absorption of high-frequency micro-vibrations by the optical coupling buffer structure without affecting the fluorescence excitation effect, in some specific embodiments of this application, the filling rate of the cured optical adhesive 2 is not less than 95%; the cured optical adhesive 2 has a bubble-free optical interface, which is any one of PMMA, optical grade polyurethane and epoxy acrylate.

[0037] Specifically, a pre-treated optical adhesive is used, which forms a bubble-free optical interface after curing at room temperature. This avoids air holes in the optical coupling buffer structure caused by residual air bubbles after curing, which would affect the vibration absorption effect.

[0038] To ensure that the cured optical adhesive 2 is fully filled, the gap between the inner diameter of the protective tube of the optical coupling layer and the outer diameter of the fluorescent optical fiber is 0.1-0.3 mm.

[0039] In order to improve the ability of the tensile mechanical reinforcement layer 4 to resist axial tensile stress and transverse shear force, in some specific embodiments of this application, the diameter of the tensile metal wire is 0.3 mm and the winding density is 30-35 turns / cm. The tensile metal wire can enhance the probe's ability to resist axial tensile stress and transverse shear force. The tensile metal wire can be any one of silver-plated bulletproof wire, nickel-plated copper alloy wire, and titanium alloy wire.

[0040] In order to improve the shock absorption effect of the mechanical buffer layer, in some specific embodiments of this application, the filling thickness of the elastic buffer material 5 is 60%-80% of the difference between the inner diameter of the stainless steel corrugated pipe and the outer diameter of the tensile mechanical reinforcement layer; the elastic buffer material 5 is any one of silicone rubber foam, modified polyurethane foam and PDMS foam.

[0041] It should be noted that the buffer layers in the above embodiments of this application may also be made of other types of materials, as long as they can achieve the same function as described above.

[0042] In order to achieve a seal at both ends of the temperature sensor probe, in some specific embodiments of this application, laser welding is used to form a metallized seal at both ends of the temperature sensor probe.

[0043] Specifically, the laser welding process parameters are: pulse frequency 20-50kHz; peak power 80-500W; and the shielding gas is a mixture of argon and nitrogen.

[0044] The above-mentioned method for preparing a vibration-resistant fluorescent fiber optic temperature sensor probe includes the following steps: Step 1: Insert the fluorescent optical fiber 1 coated with fluorescent material 7 into the protective tube 3; Step 2: Inject pretreated optical adhesive into the gap between the protective tube 3 and the fluorescent optical fiber 1; Step 3: After the optical adhesive has cured, spirally wrap the tensile metal wire around the outside of the protective tube 3 at a set angle; Step 4: Stainless steel corrugated pipe 6 is sleeved on the outside of the tensile metal wire, and elastic cushioning material 5 is filled inside the stainless steel corrugated pipe 6; Step 5: Weld the two ends of the sealed sensor probe to obtain the vibration-resistant fluorescent fiber optic temperature sensor probe.

[0045] In order to form an optical coupling buffer structure, in some specific embodiments of this application, a pre-treated optical adhesive is injected into the gap between the protective tube 3 and the fluorescent optical fiber 1. The pre-treated optical adhesive undergoes degassing and viscosity adjustment to ensure that the optical adhesive can be smoothly injected into the gap between the protective tube 3 and the fluorescent optical fiber 1, and to avoid air holes in the optical coupling buffer structure caused by residual air bubbles after curing, which would affect the vibration absorption effect. Furthermore, the pre-treated optical adhesive can be filled with ≥95% of the gap.

[0046] In the above embodiments of this application, the fluorescent optical fiber 1 is first pre-inserted into the protective tube 3, and the tube is filled with transparent elastic colloid to form a primary buffer. Metal reinforcing wires are spirally wound on the outer surface of the protective tube 3 to form a tensile stress dispersion network. Then, a deformable metal corrugated tube is sleeved on it, and porous elastic material is filled between it and the protective tube 3. The end of the corrugated tube is hermetically sealed by laser welding, thereby obtaining a vibration-resistant composite buffer fluorescent optical fiber temperature sensor probe.

[0047] Another embodiment of this application provides a temperature measurement system, which includes the above-described vibration-resistant fluorescent fiber optic temperature sensor probe.

[0048] Specifically, the vibration-resistant composite buffered fluorescent fiber optic temperature sensor probe is followed by an optical path coupling system and a signal demodulation system. Excitation light excites the fluorescent material at the end of the fiber to emit fluorescence, and the fluorescence signal returns to the signal acquisition system through the fiber. Temperature measurement is then achieved through fluorescence lifetime demodulation.

[0049] For example, the temperature measurement system includes an optical path coupling system adapted to different fluorescent materials, comprising an optical path clamp, a filter, a coupling lens, an excitation source, and a photoelectric conversion device; as well as a signal demodulation circuit and a host computer responsible for processing the fluorescence signal. One end of the optical fiber is connected to the optical path coupling system via ST, LC, SC, or FC fiber optic connectors. The optical path clamp of the optical path coupling system has three ports, which are respectively connected to the optical fiber, the excitation source, and the photoelectric conversion device. A filter and a coupling lens are disposed within the optical path clamp. The optical path clamp has a three-dimensional shape. 2.8 A 1.5cm rectangular prism. The filter is a narrow-band filter, 0.5mm-1mm thick. The fluorescence signal demodulation circuit is connected to the excitation source and photoelectric conversion device of the optical path coupling system. The host computer communicates with the fluorescence signal demodulation circuit.

[0050] The embodiments described above in this application achieve improved vibration resistance through a three-tiered protective structure design: the inner layer employs an optical coupling structure of a protective tube and specially treated optical adhesive; the middle layer features a tensile-resistant metal wire winding layer; and the outer layer combines a stainless steel corrugated tube with elastic buffer material for mechanical cushioning. Through the synergistic effect of material selection and structural optimization, including an optimized optical adhesive filling process, a spring-resistant wire winding method, and the mechanical fit of the corrugated tube, as well as a graded energy absorption mechanism, the embodiments of this application maintain the electromagnetic interference resistance of the fluorescent fiber optic sensor while significantly improving temperature measurement stability under strong vibration environments. This makes it suitable for temperature monitoring in complex operating conditions such as power equipment and rail transportation.

[0051] The preferred features in the above embodiments can be used individually in any embodiment, or in any combination thereof, provided they do not conflict with each other. Furthermore, parts not described in detail in the embodiments can be implemented using existing technologies.

[0052] The following examples and comparative examples will be used to further illustrate this application in order to better understand the above-mentioned technical solutions. It should be understood that the following are only some examples and are not intended to limit this application.

[0053] Application Example 1: Reference Figure 2 and Figure 3 The vibration-resistant fluorescent fiber optic temperature sensor probe provided in this application example is fabricated as follows: S0: Material pretreatment, specifically referring to the removal of surface impurities from a 0.2mm diameter fluorescent optical fiber coated with fluorescent material via plasma cleaning, followed by drying in a 60℃ oven for 30 minutes. A 0.5mm inner diameter polyimide tube is selected, ultrasonically cleaned with ethanol, and then coated with a silane coupling agent on its inner wall to enhance adhesion.

[0054] S1: Device assembly, specifically referring to using a vacuum-assisted fiber threading device to insert the optical fiber centered into the polyimide tube and fix the fiber. After fixing both ends, a pre-tightening force is applied to keep the fiber straight. Then, nano-silica modified PMMA adhesive with a viscosity of 3500 cps is injected between the optical fiber and the polyimide tube, and maintained in a 0.08 MPa vacuum environment for 20 minutes to ensure a filling rate of ≥95%. Next, silver-plated bulletproof wire is wound around the outside of the protective tube at a 45° helix angle, 3-4 turns per millimeter, and the ends are fixed with conductive adhesive.

[0055] S2: Buffer layer encapsulation specifically refers to fitting the assembled device into a 0.1mm thick 316L stainless steel corrugated tube, with the gap between the stainless steel corrugated tube and the polyimide tube controlled at 0.5±0.05mm. Then, a secondary filling of the gap between the stainless steel corrugated tube and the polyimide tube is performed by injecting silicone rubber foam with a density of 0.45g / cm³, followed by curing at 80℃ for 1 hour to form an elastic buffer layer. Finally, an 80W, 20Hz pulsed laser welding method is used to seal the six ends of the stainless steel corrugated tube, completing the encapsulation.

[0056] Comparative Example 1: Reference Figure 4 This comparative example provides a comparison of temperature measurement under vibration conditions between a vibration-resistant fluorescent fiber optic temperature sensor probe and a conventional fluorescent fiber optic temperature probe (without vibration-resistant structural design). One end of both the vibration-resistant and conventional fluorescent fiber optic temperature probes were placed on a high-frequency vibration table, and the other end was connected to a temperature measurement system. The entire setup was placed in a constant temperature chamber at approximately 22°C.

[0057] In a vibrating environment, the temperature measurement error of a conventional fluorescent fiber optic temperature probe reaches ±1.2K, while the temperature measurement error of the vibration-resistant fluorescent fiber optic temperature sensor probe is only ±0.4K, demonstrating excellent vibration-resistant temperature measurement performance.

[0058] In the description of the embodiments of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0059] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0060] In the description of the embodiments in this application, "multiple" means two or more, unless otherwise explicitly specified. In this application, unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," "fixed," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0061] The terms "comprising" and "having," and any variations thereof, in the embodiments of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such processes, methods, products, or devices.

[0062] The foregoing has described some specific embodiments of this application. It should be understood that this application is not limited to the specific embodiments described above, and those skilled in the art can make various modifications or variations within the scope of the claims, which do not affect the substantive content of this application. The above-described preferred features can be used in any combination without conflict.

Claims

1. A vibration-resistant fluorescent fiber optic temperature sensor probe, characterized in that, The temperature sensor probe comprises a three-level composite structure from the inside out, wherein: The inner layer is a fluorescent optical fiber wrapped in a protective tube, and the protective tube is filled with cured optical adhesive to form an optical coupling layer; The middle layer is a tensile mechanical reinforcement layer, which is formed by spirally winding tensile metal wires; The outer layer is a mechanical buffer layer, which includes a stainless steel corrugated pipe and an elastic buffer material filled inside it; The three-layer structure of the inner layer, the middle layer, and the outer layer forms a metallized sealing structure at the ends.

2. The vibration-resistant fluorescent fiber optic temperature sensor probe according to claim 1, characterized in that, The fluorescent material is coated onto the end of the fluorescent optical fiber to form a fluorescent sensitive layer with a thickness of 10-50 μm.

3. The vibration-resistant fluorescent fiber optic temperature sensor probe according to claim 1, characterized in that, The protective tube can be either a polyimide protective tube or a PVC protective tube.

4. The vibration-resistant fluorescent fiber optic temperature sensor probe according to claim 1, characterized in that, The curing optical adhesive has a filling rate of not less than 95%; the curing optical adhesive has a bubble-free optical interface and is made of any one of PMMA, optical grade polyurethane and epoxy acrylate.

5. The vibration-resistant fluorescent fiber optic temperature sensor probe according to claim 1, characterized in that, The tensile metal wire has a diameter of 0.3 mm, a winding angle of 30°-60°, and a winding density of 30~35 turns / cm; the tensile metal wire can be any one of silver-plated bulletproof wire, nickel-plated copper alloy wire, and titanium alloy wire.

6. The vibration-resistant fluorescent fiber optic temperature sensor probe according to claim 1, characterized in that, The filling thickness of the elastic cushioning material is 60%-80% of the difference between the inner diameter of the stainless steel corrugated pipe and the outer diameter of the tensile mechanical reinforcement layer; the elastic cushioning material is any one of silicone rubber foam, modified polyurethane foam and PDMS foam.

7. The vibration-resistant fluorescent fiber optic temperature sensor probe according to claim 1, characterized in that, Laser welding is used to form a metallized seal at both ends of the temperature sensor probe.

8. A method for preparing a vibration-resistant fluorescent fiber optic temperature sensor probe according to any one of claims 1-7, characterized in that, include: The fluorescent optical fiber coated with fluorescent material is pre-threaded into the protective tube; Pretreated optical adhesive is injected into the gap between the protective tube and the fluorescent optical fiber; After the optical adhesive has cured, tensile metal wire is spirally wound around the outside of the protective tube at a set angle; A stainless steel corrugated tube is sleeved on the outside of the tensile metal wire, and an elastic cushioning material is filled inside the stainless steel corrugated tube. Welding seals both ends of the sensor probe to obtain a vibration-resistant fluorescent fiber optic temperature sensor probe.

9. The method for preparing the vibration-resistant fluorescent fiber optic temperature sensor probe according to claim 8, characterized in that, The pretreated optical adhesive is injected into the gap between the protective tube and the fluorescent optical fiber, wherein the pretreated optical adhesive has undergone degassing treatment and viscosity adjustment, and the filling rate of the pretreated optical adhesive in the gap is ≥95%.

10. A temperature measurement system, characterized in that, Including the vibration-resistant fluorescent fiber optic temperature sensor probe according to any one of claims 1-7.

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