A calibration method and system for a fluorescent fiber optic thermometer

Abstract

This invention provides a calibration method and system for a fluorescent fiber optic thermometer. The calibration preparation step involves cleaning and preliminary inspection of the thermometer to be calibrated, eliminating measurement deviations caused by contamination or damage at the source, laying the foundation for subsequent high-precision calibration. The overall error calibration step performs preliminary screening of the excitation wavelength and fluorescence wavelength to ensure that basic parameters meet the set range. When the overall error is within the set range, a refined calibration step is performed to thoroughly calibrate key parameters such as bending radius, temperature reading, alarm temperature error, and dynamic response time, comprehensively covering the temperature measurement needs in medical scenarios. If the overall error exceeds the limit, the device is directly output as unusable, improving calibration efficiency. This method, through a layered calibration strategy, combines macroscopic screening with microscopic refinement, improving the comprehensiveness and adaptability of calibration, and is particularly suitable for the stringent requirements of long-term thermometer stability in high-precision medical environments.

Description

Technical Field

[0001] This invention belongs to the field of fluorescent fiber optic thermometer calibration technology, specifically relating to a fluorescent fiber optic thermometer calibration method and system. Background Technology

[0002] Fluorescent fiber optic thermometers are optical sensors that measure temperature based on the monotonic relationship between the fluorescence lifetime or fluorescence intensity of fluorescent materials and temperature. Due to their advantages such as resistance to electromagnetic interference, small size, good insulation, high temperature resistance, and corrosion resistance, they play a crucial role in the medical field (e.g., cancer hyperthermia, surgical monitoring). For example, during tumor hyperthermia, temperature accuracy needs to be controlled between 42℃ and 44℃ to avoid damage to normal tissues; high-precision temperature measurement is essential, making regular calibration of fluorescent fiber optic thermometers of great significance.

[0003] Currently, the industry generally adopts JJF 1630-2017 "Calibration Specification for Distributed Fiber Optic Thermometers" for calibrating fiber optic thermometers. Distributed fiber optic thermometers mainly use the temperature effect of fiber Raman scattering for temperature measurement. A single temperature-sensing fiber usually has multiple temperature-sensing nodes. Its structure and working principle are completely different from those of fluorescent fiber optic thermometers and are not suitable for fluorescent fiber optic thermometers. Therefore, this calibration method is not applicable to the calibration of fluorescent fiber optic thermometers. As a result, when calibrating fluorescent fiber optic thermometers in current use, only the most basic indication calibration is often used, which has the problems of incomplete calibration and lack of standardization, causing great inconvenience to the use of fluorescent fiber optic thermometers. Summary of the Invention

[0004] To address the problem that in the prior art, the calibration of fluorescent fiber optic thermometers often only uses the most basic indication calibration, which results in incomplete calibration and a lack of standardization, this invention provides a calibration method and system for fluorescent fiber optic thermometers.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: In a first aspect, the present invention provides a calibration method for a fluorescent fiber optic thermometer, comprising: S1: Calibration preparation: Clean and perform a preliminary inspection of the fluorescent fiber optic thermometer to be calibrated to ensure that the fluorescent fiber optic thermometer is free from damage and contamination. S2: Overall error calibration: Use the fluorescent fiber optic thermometer calibration system to perform overall error calibration on the fluorescent fiber optic thermometer to be calibrated and obtain the overall error result; if the overall error result is within the set range, proceed to step S3; otherwise, proceed to step S4. S3: Refined Calibration: The fluorescent fiber optic thermometer calibration system is used to perform refined calibration on the fluorescent fiber optic thermometer to be calibrated, and the refined calibration results are obtained. S4: Generate calibration results: When the overall error result is within the set range, generate and output correction values ​​based on the overall error result and the refined calibration results; when the overall error result is not within the set range, output calibration results as "This fluorescent fiber optic thermometer cannot be used normally".

[0006] Optionally, step S2 includes: S2.1: Use the excitation wavelength calibration unit in the fluorescent fiber optic thermometer calibration system to calibrate the excitation wavelength of the fluorescent fiber optic thermometer to be calibrated, and obtain the excitation wavelength deviation of the fluorescent fiber optic thermometer to be calibrated. S2.2: Use the fluorescence wavelength calibration unit of the fluorescence fiber optic thermometer calibration system to perform fluorescence wavelength calibration on the fluorescence fiber optic thermometer to be calibrated, and obtain the fluorescence wavelength deviation of the fluorescence fiber optic thermometer to be calibrated. S2.3: Compare the excitation wavelength deviation and fluorescence wavelength deviation of the fluorescent fiber thermometer to be calibrated with the preset range. If both the excitation wavelength deviation and fluorescence wavelength deviation are within the set range, proceed to step S3; otherwise, proceed to step S4.

[0007] Optionally, the setting range is ±5 nanometers.

[0008] Optionally, step S2.1 includes: S2.1.1: Obtain the nominal wavelength of the excitation light of the fluorescent fiber optic thermometer to be calibrated; S2.1.2: Connect the fiber optic port of the fluorescent fiber optic thermometer to be calibrated to the spectrometer in the excitation wavelength calibration unit via optical fiber; S2.1.3: Start the fluorescent fiber optic thermometer to be calibrated, output excitation light to the spectrometer in the excitation wavelength calibration unit through the optical fiber, and obtain the actual excitation wavelength of the fluorescent fiber optic thermometer to be calibrated through the spectrometer; S2.1.4: Obtain the difference between the actual excitation wavelength and the nominal wavelength of the fluorescent fiber optic thermometer to be calibrated, as the excitation wavelength deviation.

[0009] Optionally, step S2.2 includes: S2.2.1: Obtain the nominal wavelength of the fluorescent material of the fluorescent fiber optic thermometer to be calibrated; S2.2.2: Connect the trunk end of the Y-type fiber optic splitter in the fluorescence wavelength calibration unit to the fluorescence fiber optic thermometer to be calibrated, and connect the branch ends of the Y-type fiber optic splitter to the spectrometer and the excitation source respectively. S2.2.3: Start the fluorescence wavelength calibration unit and obtain the actual fluorescence wavelength of the fluorescence fiber optic thermometer to be calibrated through the spectrometer; S2.2.4: Obtain the difference between the actual fluorescence wavelength of the fluorescent fiber thermometer to be calibrated and the nominal wavelength of the fluorescent material, as the fluorescence wavelength deviation.

[0010] Optionally, step S3 includes: S3.1: Use the bending radius test unit in the fluorescence fiber optic thermometer calibration system to test the bending radius of the fiber optic sensing part of the fluorescence fiber optic thermometer to be calibrated, and obtain the bending radius data of the fluorescence fiber optic thermometer to be calibrated. S3.2: Use the temperature indication calibration unit in the fluorescent fiber optic thermometer calibration system to calibrate the temperature indication of the fluorescent fiber optic thermometer to be calibrated, and obtain the temperature indication error of the fluorescent fiber optic thermometer to be calibrated. S3.3: Use the alarm temperature error calibration unit in the fluorescent fiber optic thermometer calibration system to perform alarm temperature error calibration on the fluorescent fiber optic thermometer to be calibrated, and obtain the alarm temperature error of the fluorescent fiber optic thermometer to be calibrated. S3.4: Use the dynamic response time calibration unit in the fluorescent fiber optic thermometer calibration system to perform dynamic response time calibration on the fluorescent fiber optic thermometer to be calibrated, and obtain the dynamic response time error of the fluorescent fiber optic thermometer to be calibrated. S3.5: Use the bending radius data, temperature indication error, alarm temperature error, and dynamic response time error of the fluorescent fiber optic thermometer to be calibrated as the refined calibration results.

[0011] Optionally, the process also includes step S5: cleaning and disinfecting the calibrated fluorescent fiber optic thermometer and storing it.

[0012] Secondly, the present invention provides a fluorescent fiber optic thermometer calibration system for implementing the above-mentioned fluorescent fiber optic thermometer calibration method, including an excitation wavelength calibration unit, a fluorescence wavelength calibration unit, a bending radius testing unit, a temperature indication calibration unit, an alarm temperature error calibration unit, a dynamic response time calibration unit, and a result output unit. The excitation wavelength calibration unit is used to calibrate the excitation wavelength of the fluorescent fiber optic thermometer to be calibrated, and to obtain the excitation wavelength deviation of the fluorescent fiber optic thermometer to be calibrated. The fluorescence wavelength calibration unit is used to calibrate the fluorescence wavelength of the fluorescent fiber optic thermometer to be calibrated, and to obtain the fluorescence wavelength deviation of the fluorescent fiber optic thermometer to be calibrated. The bending radius testing unit is used to test the bending radius of the fluorescent fiber optic thermometer to be calibrated, and to obtain the bending radius data of the fluorescent fiber optic thermometer to be calibrated. The temperature indication calibration unit is used to calibrate the temperature indication of the fluorescent fiber optic thermometer to be calibrated, and to obtain the temperature indication error of the fluorescent fiber optic thermometer to be calibrated. The alarm temperature error calibration unit is used to calibrate the alarm temperature error of the fluorescent fiber optic thermometer to be calibrated, and to obtain the alarm temperature error of the fluorescent fiber optic thermometer to be calibrated. The dynamic response time calibration unit is used to perform dynamic response time calibration on the fluorescent fiber optic thermometer to be calibrated, and to obtain the dynamic response time error of the fluorescent fiber optic thermometer to be calibrated. The result output unit is used to generate and output calibration results.

[0013] Optionally, the excitation wavelength calibration unit includes a spectrometer and a connecting optical fiber; The fluorescence wavelength calibration unit includes a Y-type fiber beam splitter, a spectrometer, and an excitation source.

[0014] Optionally, the system also includes a disinfection and cleaning unit.

[0015] The beneficial effects of this invention are: This invention provides a calibration method and system for a fluorescent fiber optic thermometer. Through a step-by-step process encompassing calibration preparation, overall error calibration, refined calibration, and result generation, the system ensures the systematic nature and reliability of the calibration process. Specifically, the calibration preparation step cleans and preliminarily inspects the fluorescent fiber optic thermometer to be calibrated, eliminating measurement deviations caused by contamination or damage at the source, laying the foundation for subsequent high-precision calibration. The overall error calibration step performs preliminary screening of the excitation wavelength and fluorescence wavelength to ensure that basic parameters meet the set range. When the overall error is within the set range, the refined calibration step is executed to deeply calibrate key parameters such as bending radius, temperature reading, alarm temperature error, and dynamic response time, comprehensively covering the temperature measurement needs in medical scenarios. If the overall error exceeds the limit, the system directly outputs a "device unusable" result, improving calibration efficiency. The calibration result generation step outputs correction values ​​based on the overall error and refined calibration data, enabling traceability and consistency of temperature measurements in medical applications such as cancer hyperthermia, significantly reducing medical risks caused by equipment inaccuracies. This method combines macroscopic screening with microscopic refinement through a stratified calibration strategy, which improves the comprehensiveness and adaptability of calibration, and is especially suitable for the stringent requirements of long-term thermometer stability in high-precision medical environments. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the fluorescence fiber optic thermometer calibration method in this invention; Figure 2 This is a schematic diagram of the excitation wavelength calibration unit in this invention; Figure 3 This is a schematic diagram of the fluorescence wavelength calibration unit in this invention; Figure 4 This is a schematic diagram of the bending radius testing unit in this invention; Figure 5This is a schematic diagram of the temperature indication calibration unit in this invention; Figure 6 This is a schematic diagram of the dynamic response time calibration unit in this invention.

[0017] The components include: 1. Fluorescent fiber optic thermometer to be calibrated; 11. Fiber optic port; 12. Fiber optic sensing component; 2. Spectrometer; 3. Fiber optic cable; 31. ST fiber optic connector; 4. Y-type fiber optic splitter; 41. Trunk end; 42. Branch end; 5. Excitation source; 61. Constant temperature water bath; 62. Fixing bracket; 63. Thermometer; 64. Electrical measuring instrument; 65. Fiber coil clamp; 66. Thermocouple thermometer; 67. Release device; 7. High-speed data acquisition unit; 8. High-speed camera; 9. Weights. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0020] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0021] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this invention. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0022] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0023] Example 1 See Figure 1 The diagram illustrates a calibration method for a fluorescent fiber optic thermometer according to the present invention, comprising: S1: Calibration preparation: Clean and perform a preliminary inspection of the fluorescent fiber optic thermometer to be calibrated to ensure that the fluorescent fiber optic thermometer is free from damage and contamination. S2: Overall error calibration: Use the fluorescent fiber optic thermometer calibration system to perform overall error calibration on the fluorescent fiber optic thermometer to be calibrated and obtain the overall error result; if the overall error result is within the set range, proceed to step S3; otherwise, proceed to step S4. S3: Refined Calibration: The fluorescent fiber optic thermometer calibration system is used to perform refined calibration on the fluorescent fiber optic thermometer to be calibrated, and the refined calibration results are obtained. S4: Generate calibration results: When the overall error result is within the set range, generate and output correction values ​​based on the overall error result and the refined calibration results; when the overall error result is not within the set range, output calibration results as "This fluorescent fiber optic thermometer cannot be used normally".

[0024] In this embodiment, a step-by-step process—calibration preparation, overall error calibration, refined calibration, and result generation—ensures the systematic nature and reliability of the calibration process. Specifically, the calibration preparation step cleans and preliminarily inspects the fluorescent fiber optic thermometer to be calibrated, eliminating measurement deviations caused by contamination or damage at the source and laying the foundation for subsequent high-precision calibration. The overall error calibration step performs preliminary screening of the excitation wavelength and fluorescence wavelength to ensure that basic parameters meet the set range. When the overall error is within the set range, the refined calibration step is executed to perform in-depth calibration of key parameters such as bending radius, temperature reading, alarm temperature error, and dynamic response time, comprehensively covering the temperature measurement needs in medical scenarios. If the overall error exceeds the limit, the result "device unusable" is directly output, improving calibration efficiency. The calibration result generation step outputs correction values ​​based on the overall error and refined calibration data, enabling the thermometer to achieve traceability and consistency in temperature measurement in medical applications such as cancer hyperthermia, significantly reducing medical risks caused by equipment inaccuracies. This method combines macroscopic screening with microscopic refinement through a stratified calibration strategy, which improves the comprehensiveness and adaptability of calibration, and is especially suitable for the stringent requirements of long-term thermometer stability in high-precision medical environments.

[0025] Optionally, step S2 in this invention includes: S2.1: Use the excitation wavelength calibration unit in the fluorescent fiber optic thermometer calibration system to calibrate the excitation wavelength of the fluorescent fiber optic thermometer to be calibrated, and obtain the excitation wavelength deviation of the fluorescent fiber optic thermometer to be calibrated. S2.2: Use the fluorescence wavelength calibration unit of the fluorescence fiber optic thermometer calibration system to perform fluorescence wavelength calibration on the fluorescence fiber optic thermometer to be calibrated, and obtain the fluorescence wavelength deviation of the fluorescence fiber optic thermometer to be calibrated. S2.3: Compare the excitation wavelength deviation and fluorescence wavelength deviation of the fluorescent fiber thermometer to be calibrated with the preset range. If both the excitation wavelength deviation and fluorescence wavelength deviation are within the set range, proceed to step S3; otherwise, proceed to step S4.

[0026] Optionally, the setting range in this invention is ±5 nanometers.

[0027] In this embodiment, the excitation wavelength calibration unit ensures the stability of the excitation source by measuring the deviation between the actual excitation wavelength and the nominal wavelength, avoiding a decrease in fluorescence excitation efficiency caused by wavelength drift, thereby guaranteeing the reliability of the thermometer signal source. The fluorescence wavelength calibration unit connects the spectrometer and the excitation source via a Y-type fiber optic beam splitter to accurately measure the emission wavelength deviation of the fluorescent material, verifying the performance consistency of the fluorescent material after long-term use. This invention compares the excitation wavelength deviation and fluorescence wavelength deviation with preset ranges as a prerequisite for performing refined calibration, making the calibration process logically progressive. Subsequent complex parameter calibrations are only performed when both deviations are within reasonable ranges, avoiding waste of calibration resources due to abnormal basic parameters. This step-by-step verification mechanism enhances the intelligence of the calibration system, ensuring that the medical fluorescence fiber optic thermometer maintains a high signal-to-noise ratio in electromagnetic interference-resistant scenarios, and improving the accuracy of temperature control during thermotherapy.

[0028] Optionally, refer to Figure 2 Step S2.1 in this invention includes: S2.1.1: Obtain the nominal wavelength of the excitation light of the fluorescent fiber optic thermometer to be calibrated; S2.1.2: Connect the fiber optic port 11 of the fluorescent fiber optic thermometer 1 to be calibrated to the spectrometer 2 in the excitation wavelength calibration unit via fiber optic cable 3; S2.1.3: Start the fluorescent fiber optic thermometer to be calibrated, output excitation light to the spectrometer in the excitation wavelength calibration unit through the optical fiber, and obtain the actual excitation wavelength of the fluorescent fiber optic thermometer to be calibrated through the spectrometer; S2.1.4: Obtain the difference between the actual excitation wavelength and the nominal wavelength of the fluorescent fiber optic thermometer to be calibrated, as the excitation wavelength deviation.

[0029] In this embodiment, the excitation wavelength of the fluorescent fiber thermometer to be calibrated is calibrated by the excitation wavelength calibration unit. Specifically, the excitation wavelength calibration system includes a spectrometer and a connecting fiber. The two ends of the connecting fiber 3 are connected to the fiber port 11 of the fluorescent fiber thermometer to be calibrated and the spectrometer 2 respectively through ST fiber connectors 31, so as to realize the measurement of the actual excitation wavelength.

[0030] Specifically, the purpose of calibrating the excitation source wavelength in this invention is to check whether the excitation source wavelength has drifted. If the excitation source wavelength drifts, it will be unable to effectively excite the fluorescent material, which will have a significant impact on the temperature error of the fluorescent fiber optic thermometer, and adjustment is required.

[0031] Optionally, refer to Figure 3 Step S2.2 in this invention includes: S2.2.1: Obtain the nominal wavelength of the fluorescent material of the fluorescent fiber optic thermometer 1 to be calibrated; S2.2.2: Connect the trunk end 41 of the Y-type fiber beam splitter 4 in the fluorescence wavelength calibration unit to the fluorescence fiber thermometer 1 to be calibrated, and connect the branch end 42 of the Y-type fiber beam splitter 4 to the spectrometer 2 and the excitation source 5 respectively. S2.2.3: Start the fluorescence wavelength calibration unit and obtain the actual fluorescence wavelength of the fluorescence fiber thermometer 1 to be calibrated through the spectrometer 2; S2.2.4: Obtain the difference between the actual fluorescence wavelength of the fluorescent fiber thermometer 1 to be calibrated and the nominal wavelength of the fluorescent material, as the fluorescence wavelength deviation.

[0032] In this embodiment, the fluorescence wavelength calibration unit performs fluorescence wavelength calibration on the fluorescent fiber optic thermometer to be calibrated to obtain the fluorescence wavelength deviation of the fluorescent fiber optic thermometer to be calibrated. Specifically, the fluorescence wavelength calibration unit includes a spectrometer, a Y-type fiber optic splitter and an excitation source. The main end 41 of the Y-type fiber optic splitter is connected to the fiber optic sensor through the ST fiber optic connector 31, and the branches of the Y-type fiber optic splitter are connected to the excitation source and the spectrometer respectively, for measuring the fluorescence wavelength of the fluorescent material.

[0033] Specifically, the purpose of measuring the fluorescence wavelength of the fluorescent material in this invention is to check whether the fluorescence wavelength has drifted. If the fluorescence wavelength drifts, the photodetector will not be able to receive the fluorescence at the target wavelength, which will have a significant impact on the temperature error of the fluorescent fiber optic thermometer.

[0034] Optionally, step S3 in this invention includes: S3.1: Reference Figure 4 The bending radius test unit in the fluorescence fiber optic thermometer calibration system is used to test the bending radius of the fiber optic sensing part 12 of the fluorescence fiber optic thermometer to be calibrated, thereby obtaining the bending radius data of the fluorescence fiber optic thermometer to be calibrated. Specifically, the bending radius test unit includes a constant temperature water bath 61, a fixed bracket 62, a thermometer 63, an electrical measuring instrument 64, and multiple fiber coiling clamps 65 with different diameters. The bending radius test specifically includes: S3.1.1: Keep the fiber optic sensing part of the fluorescent fiber optic thermometer to be calibrated in a straight line and test its temperature error t0; S3.1.2: If the fluorescent fiber thermometer to be calibrated has a nominal bending radius, then wind its fiber evenly around its corresponding fiber winding fixture, and then place it in the constant temperature water bath 61 to test the temperature error before and after. If the absolute value of the temperature error before and after is <0.1℃, then the requirement is met; if the fluorescent fiber thermometer to be calibrated has not a nominal bending radius, then proceed to step S3.1.3. S3.1.3: Arrange the fiber optic coiling fixtures in descending order of diameter, select the fiber optic coiling fixture with the largest bending radius, evenly wind the fiber of the fluorescent fiber optic thermometer to be calibrated onto the fixture, place it in the constant temperature water bath 61, test its temperature error, and calculate the temperature error change value. S3.1.4: If the temperature error change value is <0.1℃ at this time, replace the fiber optic coiling fixture with the next diameter and repeat step S3.1.3 until the temperature error change value is >0.1℃. Record the diameter of the fiber optic coiling fixture at this time, and take half of it as the bending radius data of the fluorescent fiber optic thermometer to be calibrated.

[0035] Furthermore, the thermometer is a Class II standard platinum resistance thermometer.

[0036] Furthermore, the bending radius test is performed in this embodiment because, during the use of the fluorescent fiber optic thermometer, if the bending radius of the fiber is too small, it will affect the transmission of light and cause a large error. Therefore, obtaining a suitable bending radius test is of great significance for practical use.

[0037] S3.2: Reference Figure 5 The temperature indication calibration unit in the fluorescent fiber optic thermometer calibration system is used to calibrate the temperature indication of the fluorescent fiber optic thermometer to be calibrated, thereby obtaining the temperature indication error of the fluorescent fiber optic thermometer to be calibrated. Specifically, the temperature indication calibration unit includes a constant temperature water bath 61, a fixed bracket 62, a thermometer 63, and an electrical measuring instrument 64. The following method is used when calibrating the temperature indication: S3.2.1: Standard Temperature Measurement: Based on usage requirements, set the interval temperature. Within the measurement range of the fluorescent fiber optic thermometer to be calibrated, measure the temperature using thermometer 63 at the set intervals, from the lowest to the highest temperature point of the measurement range. Record the readings sequentially. t s1 , t s2 , t s3 , ..., t sn ; where t s1 The lowest temperature point representing the metering range. t sn The highest temperature point in the measurement range is represented by n, where n is the number of measurement points. S3.2.2: Measurement with the fluorescent fiber optic thermometer to be calibrated: At the same temperature points according to the set temperature intervals, the temperature is measured using the fluorescent fiber optic thermometer to be calibrated, and the readings are recorded sequentially. t d1 , t d2 , t d3, ..., t dn ; S3.2.3: Divide the temperature range and calculate the correction factor: Divide the measurement range of the fluorescent fiber optic thermometer to be calibrated into several intervals according to the measurement points. For each interval ( t s(n 1) - t sn ), calculate the correction factor k This correction factor reflects the linear relationship between the reading to be calibrated and the standard reading: The calibration of the fluorescent fiber optic thermometer to be calibrated is completed by reflecting the linear relationship between the reading to be calibrated and the standard reading based on the correction factor. S3.2.4: Application of Correction Formula: In practical use, for a calibrated fluorescent fiber optic thermometer, when any measured value is obtained during use... t c Determine its location Intervals and corresponding The corrected reading t is calculated using the correction formula: This yields the corrected temperature reading.

[0038] It should be noted that temperature indication error is the most significant characteristic of fluorescent fiber optic thermometers. This embodiment obtains a correction value or correction factor through temperature indication error calibration to improve temperature measurement accuracy.

[0039] It should be noted that in actual use, after each calibration of the fluorescent fiber optic thermometer, the obtained correction factor or correction formula should be added to the calibration report of the fluorescent fiber optic thermometer so that the user can verify it.

[0040] S3.3: The alarm temperature error calibration unit in the fluorescent fiber optic thermometer calibration system is used to calibrate the alarm temperature error of the fluorescent fiber optic thermometer to be calibrated, thereby obtaining the alarm temperature error of the fluorescent fiber optic thermometer to be calibrated. Specifically, the alarm temperature error calibration unit includes a constant temperature water bath, a fixed bracket, a thermometer, and electrical measuring instruments. The alarm temperature error calibration process specifically includes: S3.3.1: Set the constant temperature water bath to be slightly lower than the preset alarm temperature of the fluorescent fiber optic thermometer to be calibrated (e.g., 1°C), and adjust it to stabilize the temperature of the constant temperature water bath. S3.3.2: Place the fluorescent fiber optic thermometer to be calibrated into a constant temperature water bath. If the fluorescent fiber optic thermometer alarms at this time, continue to reduce the temperature of the constant temperature water bath (e.g., in 0.5℃ increments) until no alarm occurs. S3.3.3: Increase the temperature of the constant temperature water bath in increments of 0.1℃. After the temperature of the constant temperature water bath stabilizes, if the fluorescent fiber optic thermometer to be calibrated does not alarm, increase the temperature of the constant temperature water bath by another 0.1℃ until an alarm occurs. At this point, record the metrological standard temperature. S3.3.4: Remove the fluorescent fiber optic thermometer to be calibrated from the constant temperature water bath, wait for the alarm to clear for 10 seconds, and then quickly put it back into the constant temperature water bath. S3.3.5: If the fluorescent fiber optic thermometer to be calibrated alarms, repeat step S3.3.4 for at least 4 times. If no alarm is triggered in any of the 4 attempts, return to step S3.3.3. S3.3.6: The lowest standard temperature at which all four alarms occur shall be taken as the alarm temperature of the fluorescent fiber optic thermometer to be calibrated; the alarm temperature measurement error shall be calculated using the following formula: Where t is the preset alarm temperature point; t s This is the lowest standard temperature for measurement.

[0041] It should be noted that fluorescent fiber optic thermometers, especially those used in medical applications, all have a temperature warning function to improve safety during use. For example, microwave hyperthermia research shows that between 42℃ and 44℃, the survival rate of cancer cells decreases significantly with increasing temperature, while the effect diminishes after 45℃. However, heating normal human tissue to 45℃ causes irreversible damage. Therefore, obtaining the alarm temperature error and eliminating related errors is of great importance in use.

[0042] S3.4: Reference Figure 6 The dynamic response time calibration unit in the fluorescence fiber optic thermometer calibration system is used to calibrate the dynamic response time of the fluorescence fiber optic thermometer to be calibrated, thereby obtaining the dynamic response time error of the thermometer. Specifically, the dynamic response time calibration unit includes: a constant temperature water bath 61, a reference thermocouple thermometer 66, a releasable device 67, a high-speed data acquisition unit 7, a high-speed camera 8, and weights 9. The dynamic response time calibration process specifically includes: S3.4.1: Turn on and adjust the constant temperature water bath to keep the temperature of the constant temperature water bath at the set calibration point temperature, with a deviation from the calibration point not exceeding ±0.02℃, and the total temperature change not exceeding 0.04℃; S3.4.2: Fix the sensing end of the reference thermocouple thermometer to the fluorescence probe of the fluorescent fiber optic thermometer to be calibrated, and then fix it to the release device 67 controlled by the weight 9. Fix the release device 67 about 10cm above the constant temperature water bath. S3.4.3: Release weight 9 so that the sensing end of the reference thermocouple thermometer and the fluorescence probe of the fluorescent fiber optic thermometer to be calibrated fall from the room temperature environment into the constant temperature environment. S3.4.4: Use high-speed data acquisition unit 7 and high-speed camera 8 to record the temperature change relationship with time output from reference thermocouple thermometer and fluorescent fiber optic thermometer to be calibrated; S3.4.5: Use high-speed camera 8 to determine the moment when the temperature step begins and the thermal response time when the output of the temperature sensor changes to 90.0% of the temperature step. To ensure the reliability and repeatability of the results, three tests should be performed under the same conditions and the average value should be taken to obtain the dynamic response time error of the fluorescent fiber optic thermometer to be calibrated.

[0043] It should be noted that the faster the dynamic response of a fluorescent fiber optic thermometer, the faster it can measure temperature changes. Taking hyperthermia as an example, for sensors with slow dynamic response, the actual temperature may have already exceeded the safety limit, but the measured value may not have reached the limit yet. In this case, the operator may continue the heating operation, which could harm the patient.

[0044] S3.5: Use the bending radius data, temperature indication error, alarm temperature error, and dynamic response time error of the fluorescent fiber optic thermometer to be calibrated as the refined calibration results.

[0045] In this embodiment, the bending radius testing unit simulates a clinical cabling scenario using a coiled fixture to evaluate the fiber's bending resistance and prevent temperature measurement deviations caused by bending losses. The temperature indication calibration unit uses a constant-temperature water bath and a standard thermometer to correct indication errors and improve basic temperature measurement accuracy. The alarm temperature error calibration unit verifies the alarm threshold through progressive temperature approximation to ensure the safety boundary of hyperthermia. The dynamic response time calibration unit measures the temperature step response to ensure the thermometer's real-time performance in sudden change environments. This multi-parameter integrated calibration covers all the key indicators of medical thermometers, making the calibration results highly reliable and adaptable in applications such as cancer hyperthermia.

[0046] Optionally, the present invention further includes step S5: cleaning and disinfecting the calibrated fluorescent fiber optic thermometer and storing it.

[0047] In this embodiment, cleaning and disinfection remove contaminants from the calibration process, ensuring the biosafety of the thermometer in medical use; standardized storage procedures extend the lifespan of the equipment, meeting the specific requirements of medical equipment calibration, and combining metrological calibration with clinical management to improve overall medical quality.

[0048] Example 2 Secondly, the present invention also provides a fluorescence fiber optic thermometer calibration system for implementing the fluorescence fiber optic thermometer calibration method in Embodiment 1, including an excitation wavelength calibration unit, a fluorescence wavelength calibration unit, a bending radius testing unit, a temperature indication calibration unit, an alarm temperature error calibration unit, a dynamic response time calibration unit, and a result output unit. The excitation wavelength calibration unit is used to calibrate the excitation wavelength of the fluorescent fiber optic thermometer to be calibrated, and to obtain the excitation wavelength deviation of the fluorescent fiber optic thermometer to be calibrated. The fluorescence wavelength calibration unit is used to calibrate the fluorescence wavelength of the fluorescent fiber optic thermometer to be calibrated, and to obtain the fluorescence wavelength deviation of the fluorescent fiber optic thermometer to be calibrated. The bending radius test unit is used to test the bending radius of the fluorescent fiber optic thermometer to be calibrated, and to obtain the bending radius data of the fluorescent fiber optic thermometer to be calibrated. The temperature indication calibration unit is used to calibrate the temperature indication of the fluorescent fiber optic thermometer to be calibrated, and to obtain the temperature indication error of the fluorescent fiber optic thermometer to be calibrated. The alarm temperature error calibration unit is used to calibrate the alarm temperature error of the fluorescent fiber optic thermometer to be calibrated, and to obtain the alarm temperature error of the fluorescent fiber optic thermometer to be calibrated. The dynamic response time calibration unit is used to perform dynamic response time calibration on the fluorescent fiber optic thermometer to be calibrated, and to obtain the dynamic response time error of the fluorescent fiber optic thermometer to be calibrated. The result output unit is used to generate and output the calibration results.

[0049] In this embodiment, modular control of calibration parameters is achieved through unitized design. The excitation wavelength calibration unit ensures light source stability, the fluorescence wavelength calibration unit maintains material consistency, the bending radius testing unit evaluates mechanical properties, the temperature indication calibration unit provides a reference, the alarm temperature error calibration unit ensures a safety threshold, and the dynamic response time calibration unit optimizes response speed. These units work collaboratively, enabling the system to adapt to the calibration needs of different batches of thermometers, improving calibration efficiency and scalability in medical environments. It should be noted that the fluorescence fiber optic thermometer calibration system in this embodiment corresponds completely to the fluorescence fiber optic thermometer calibration method in Embodiment 1 in terms of usage and beneficial effects, and will not be repeated here.

[0050] Optionally, the excitation wavelength calibration unit in this invention includes a spectrometer and a connecting optical fiber; The fluorescence wavelength calibration unit includes a Y-type fiber beam splitter, a spectrometer, and an excitation source.

[0051] Optionally, the system of the present invention further includes a disinfection and cleaning unit.

[0052] Example 3 This embodiment uses a specific example to illustrate the calibration method of the fluorescent fiber optic thermometer in Embodiment 1 of the present invention.

[0053] In this example, the fluorescent fiber optic thermometer to be calibrated is a four-channel fluorescent fiber optic thermometer. Specifically, the calibration process is as follows: S1: Calibration preparation: Clean and perform a preliminary inspection of the fluorescent fiber optic thermometer to be calibrated to ensure that the fluorescent fiber optic thermometer is free from damage and contamination. S2: Overall error calibration: Use the fluorescent fiber optic thermometer calibration system to perform overall error calibration on the fluorescent fiber optic thermometer to be calibrated and obtain the overall error result; if the overall error result is within the set range, proceed to step S3; otherwise, proceed to step S4. S2.1: Use the excitation wavelength calibration unit in the fluorescence fiber optic thermometer calibration system to calibrate the excitation wavelength of the fluorescence fiber optic thermometer to be calibrated, and obtain the excitation wavelength deviation of the fluorescence fiber optic thermometer to be calibrated: S2.1.1: Obtain the nominal wavelength of the excitation light of the fluorescent fiber optic thermometer to be calibrated as 400nm; S2.1.2: Connect the four channels, i.e. the fiber optic ports, of the fluorescent fiber optic thermometer to be calibrated to the spectrometer in the excitation wavelength calibration unit via optical fibers. S2.1.3: Start the fluorescent fiber optic thermometer to be calibrated, output excitation light to the spectrometer in the excitation wavelength calibration unit through the optical fiber, and obtain the actual excitation wavelength of the fluorescent fiber optic thermometer to be calibrated through the spectrometer; S2.1.4: Obtain the difference between the actual excitation wavelength and the nominal wavelength of the fluorescent fiber optic thermometer to be calibrated, and record the result as the excitation wavelength deviation. Refer to Table 1 for the result.

[0054] Table 1 Excitation wavelength deviation S2.2: The fluorescence wavelength calibration unit of the fluorescence fiber optic thermometer calibration system is used to calibrate the fluorescence wavelength of the fluorescence fiber optic thermometer to be calibrated, and the fluorescence wavelength deviation of the fluorescence fiber optic thermometer to be calibrated is obtained: S2.2.1: Obtain the nominal wavelength of the fluorescent material of the fluorescent fiber optic thermometer to be calibrated as 658nm; S2.2.2: Connect the trunk end of the Y-type fiber beam splitter in the fluorescence wavelength calibration unit to multiple channels of the fluorescence fiber thermometer to be calibrated, and connect the branch ends of the Y-type fiber beam splitter to the spectrometer and the excitation source, respectively. S2.2.3: Start the fluorescence wavelength calibration unit and obtain the actual fluorescence wavelength of the fluorescence fiber optic thermometer to be calibrated through the spectrometer; S2.2.4: Obtain the difference between the actual fluorescence wavelength of the fluorescent fiber thermometer to be calibrated and the nominal wavelength of the fluorescent material, and record the result as the fluorescence wavelength deviation. Refer to Table 2.

[0055] Table 2 Fluorescence Wavelength Deviation S2.3: Compare the excitation wavelength deviation and fluorescence wavelength deviation of the fluorescent fiber thermometer to be calibrated with the preset range of ±5nm. If the excitation wavelength deviation and fluorescence wavelength deviation of the fluorescent fiber thermometer to be calibrated are both within the set range, proceed to step S3.

[0056] S3: Refined Calibration: The fluorescent fiber optic thermometer calibration system is used to refine the calibration of the fluorescent fiber optic thermometer to be calibrated and obtain the refined calibration results.

[0057] S3.1: The bending radius test unit in the fluorescence fiber optic thermometer calibration system is used to test the bending radius of the fiber optic sensing part of the fluorescence fiber optic thermometer to be calibrated, and the bending radius data of the fluorescence fiber optic thermometer to be calibrated is obtained. The specific results are shown in Table 3.

[0058] Table 3. Bending radius data of the fluorescent fiber optic thermometer to be calibrated S3.2: Use the temperature indication calibration unit in the fluorescence fiber optic thermometer calibration system to calibrate the temperature indication of the fluorescence fiber optic thermometer to be calibrated, and obtain the temperature indication error of the fluorescence fiber optic thermometer to be calibrated. The specific results are shown in Table 4.

[0059] Table 4 Temperature indication error of the fluorescent fiber optic thermometer to be calibrated Furthermore, the correction factor for the fluorescent fiber optic thermometer to be calibrated was calculated, and the correction factor is shown in Table 5.

[0060] Table 5 Correction factors for the fluorescent fiber optic thermometer to be calibrated In practical use, a calibrated fluorescent fiber optic thermometer will measure any value during use. t c Determine its location For the interval, calculate the corrected reading t using the correction formula: This yields the corrected temperature reading.

[0061] S3.3: Use the alarm temperature error calibration unit in the fluorescent fiber optic thermometer calibration system to perform alarm temperature error calibration on the fluorescent fiber optic thermometer to be calibrated, and obtain the alarm temperature error of the fluorescent fiber optic thermometer to be calibrated.

[0062] S3.4: Use the dynamic response time calibration unit in the fluorescence fiber optic thermometer calibration system to perform dynamic response time calibration on the fluorescence fiber optic thermometer to be calibrated, and obtain the dynamic response time error of the fluorescence fiber optic thermometer to be calibrated. The specific results are shown in Table 6.

[0063] Table 6 Dynamic response time error of the fluorescent fiber optic thermometer to be calibrated S4: Generate calibration results: Generate and output correction values ​​based on the overall error results and refined calibration results.

[0064] S5: Clean and disinfect the calibrated fluorescent fiber optic thermometer and store it.

[0065] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0066] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A calibration method for a fluorescent fiber optic thermometer, characterized in that, include: S1: Calibration preparation: Clean and perform a preliminary inspection of the fluorescent fiber thermometer (1) to be calibrated to ensure that the fluorescent fiber thermometer (1) to be calibrated is free from damage and contamination; S2: Overall error calibration: Use the fluorescent fiber optic thermometer calibration system to perform overall error calibration on the fluorescent fiber optic thermometer (1) to be calibrated and obtain the overall error result; when the overall error result is within the set range, execute step S3, otherwise execute step S4; S3: Refined calibration: The fluorescent fiber optic thermometer to be calibrated (1) is finely calibrated using the fluorescent fiber optic thermometer calibration system, and the fine calibration results are obtained. S4: Generate calibration results: When the overall machine error result is within the set range, generate and output correction values ​​based on the overall machine error result and the refined calibration result; When the overall error result is not within the set range, the output calibration result is "This fluorescent fiber optic thermometer cannot be used normally".

2. The calibration method for a fluorescent fiber optic thermometer according to claim 1, characterized in that, Step S2 includes: S2.1: Use the excitation wavelength calibration unit in the fluorescent fiber thermometer calibration system to calibrate the excitation wavelength of the fluorescent fiber thermometer (1) to be calibrated, and obtain the excitation wavelength deviation of the fluorescent fiber thermometer (1) to be calibrated. S2.2: Use the fluorescence wavelength calibration unit of the fluorescence fiber thermometer calibration system to perform fluorescence wavelength calibration on the fluorescence fiber thermometer (1) to be calibrated, and obtain the fluorescence wavelength deviation of the fluorescence fiber thermometer (1) to be calibrated. S2.3: Compare the excitation wavelength deviation and fluorescence wavelength deviation of the fluorescent fiber thermometer (1) to be calibrated with the preset range. If both the excitation wavelength deviation and fluorescence wavelength deviation are within the set range, execute step S3; otherwise, execute step S4.

3. The calibration method for a fluorescent fiber optic thermometer according to claim 2, characterized in that, The specified range is ±5 nanometers.

4. The calibration method for a fluorescent fiber optic thermometer according to claim 3, characterized in that, Step S2.1 includes: S2.1.1: Obtain the nominal wavelength of the excitation light of the fluorescent fiber optic thermometer (1) to be calibrated; S2.1.2: Connect the fiber optic port (11) of the fluorescent fiber optic thermometer (1) to be calibrated to the spectrometer (2) in the excitation wavelength calibration unit through the fiber optic cable (3); S2.1.3: Start the fluorescent fiber thermometer (1) to be calibrated, output excitation light to the spectrometer (2) in the excitation wavelength calibration unit through the optical fiber, and obtain the actual excitation wavelength of the fluorescent fiber thermometer (1) to be calibrated through the spectrometer (2); S2.1.4: Obtain the difference between the actual excitation wavelength and the nominal wavelength of the fluorescent fiber thermometer (1) to be calibrated, as the excitation wavelength deviation.

5. The calibration method for a fluorescent fiber optic thermometer according to claim 4, characterized in that, Step S2.2 includes: S2.2.1: Obtain the nominal wavelength of the fluorescent material of the fluorescent fiber thermometer (1) to be calibrated; S2.2.2: Connect the trunk end (41) of the Y-type fiber beam splitter (4) in the fluorescence wavelength calibration unit to the fluorescence fiber thermometer (1) to be calibrated, and connect the branch end (42) of the Y-type fiber beam splitter (4) to the spectrometer (2) and the excitation source (5) respectively. S2.2.3: Start the fluorescence wavelength calibration unit and obtain the actual fluorescence wavelength of the fluorescence fiber thermometer (1) to be calibrated through the spectrometer (2); S2.2.4: Obtain the difference between the actual fluorescence wavelength of the fluorescent fiber thermometer (1) to be calibrated and the nominal wavelength of the fluorescent material, as the fluorescence wavelength deviation.

6. The calibration method for a fluorescent fiber optic thermometer according to claim 5, characterized in that, Step S3 includes: S3.1: Use the bending radius test unit in the fluorescent fiber optic thermometer calibration system to perform bending radius test on the fiber optic sensing part (12) of the fluorescent fiber optic thermometer (1) to be calibrated, and obtain the bending radius data of the fluorescent fiber optic thermometer (1) to be calibrated. S3.2: Use the temperature indication calibration unit in the fluorescent fiber optic thermometer calibration system to calibrate the temperature indication of the fluorescent fiber optic thermometer (1) to be calibrated, and obtain the temperature indication error of the fluorescent fiber optic thermometer (1) to be calibrated. S3.3: Use the alarm temperature error calibration unit in the fluorescent fiber optic thermometer calibration system to perform alarm temperature error calibration on the fluorescent fiber optic thermometer (1) to be calibrated, and obtain the alarm temperature error of the fluorescent fiber optic thermometer (1) to be calibrated. S3.4: Use the dynamic response time calibration unit in the fluorescent fiber optic thermometer calibration system to perform dynamic response time calibration on the fluorescent fiber optic thermometer (1) to be calibrated, and obtain the dynamic response time error of the fluorescent fiber optic thermometer (1) to be calibrated. S3.5: Use the bending radius data, temperature indication error, alarm temperature error and dynamic response time error of the fluorescent fiber thermometer (1) to be calibrated as the refined calibration results.

7. The calibration method for a fluorescent fiber optic thermometer according to claim 6, characterized in that, It also includes step S5: cleaning and disinfecting the calibrated fluorescent fiber optic thermometer and storing it.

8. A fluorescence fiber optic thermometer calibration system for implementing the fluorescence fiber optic thermometer calibration method of claim 7, characterized in that, It includes an excitation wavelength calibration unit, a fluorescence wavelength calibration unit, a bending radius testing unit, a temperature indication calibration unit, an alarm temperature error calibration unit, a dynamic response time calibration unit, and a result output unit; The excitation wavelength calibration unit is used to calibrate the excitation wavelength of the fluorescent fiber thermometer (1) to be calibrated, and to obtain the excitation wavelength deviation of the fluorescent fiber thermometer (1) to be calibrated. The fluorescence wavelength calibration unit is used to perform fluorescence wavelength calibration on the fluorescence fiber thermometer (1) to be calibrated, and to obtain the fluorescence wavelength deviation of the fluorescence fiber thermometer (1) to be calibrated. The bending radius testing unit is used to perform bending radius testing on the fluorescent fiber thermometer (1) to be calibrated, and to obtain bending radius data of the fluorescent fiber thermometer (1) to be calibrated. The temperature indication calibration unit is used to calibrate the temperature indication of the fluorescent fiber thermometer (1) to be calibrated, and to obtain the temperature indication error of the fluorescent fiber thermometer (1) to be calibrated. The alarm temperature error calibration unit is used to calibrate the alarm temperature error of the fluorescent fiber thermometer (1) to be calibrated, and to obtain the alarm temperature error of the fluorescent fiber thermometer (1) to be calibrated. The dynamic response time calibration unit is used to perform dynamic response time calibration on the fluorescent fiber thermometer (1) to be calibrated, and to obtain the dynamic response time error of the fluorescent fiber thermometer (1) to be calibrated. The result output unit is used to generate and output calibration results.

9. The fluorescence fiber optic thermometer calibration system according to claim 8, characterized in that, The excitation wavelength calibration unit includes a spectrometer (2) and a connecting optical fiber; The fluorescence wavelength calibration unit includes a Y-type fiber beam splitter (4), a spectrometer (2), and an excitation source (5).

10. The fluorescence fiber optic thermometer calibration system according to claim 8, characterized in that, The system also includes a disinfection and cleaning unit.

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