Cable Joint Temperature Detection Method and Device, Electronic Equipment, Storage Medium

Abstract

The present disclosure provides a method and device for detecting the temperature of a cable joint, an electronic device, and a storage medium, belonging to the technical field of optical fiber temperature measurement. The method includes: determining a target acquisition duration based on the attributes of the cable joint and the characteristics of the fluorescent material, and determining a target acquisition frequency based on the attributes of the cable joint and the characteristics of the fluorescent material; the fluorescent material is the fluorescent substance in the optical fiber probe of the optical fiber temperature sensor; performing temperature measurement on the cable joint based on the target acquisition duration and the target acquisition frequency to obtain a first temperature; and calibrating the first temperature based on the environmental information where the cable joint is located to obtain a second temperature of the cable joint. The present disclosure can reduce the temperature measurement error of the cable joint and improve the accuracy of temperature measurement.

Description

Technical Field

[0001] The present disclosure belongs to the technical field of optical fiber temperature measurement, and more specifically, relates to a method and device for detecting the temperature of a cable joint, an electronic device, and a storage medium. Background Art

[0002] In modern power transmission, operation of industrial electrical equipment, and various complex scenarios involving the use of cables, the cable joint, as a key connection part of the cable line, plays a crucial role in the safety and reliability of the entire system. Due to various factors such as contact resistance, heat dissipation conditions, and load current fluctuations, the cable joint is extremely prone to abnormal temperature rise. Once the temperature gets out of control and exceeds the safety threshold, it may cause accelerated insulation aging, short - circuit faults, and even serious consequences such as fires and large - scale power outages, bringing huge losses and inconveniences to production and life.

[0003] Traditional means for monitoring the temperature of cable joints have many limitations. For example, in the temperature measurement methods based on thermocouples and thermal resistors, these contact - type temperature - measuring elements need to be in close physical contact with the object to be measured. However, these elements will be affected by the long - term vibration, thermal expansion and contraction of the cable joint, which will damage the contact stability and lead to an increase in temperature measurement error. Summary of the Invention

[0004] The purpose of the present disclosure is to provide a method and device for detecting the temperature of a cable joint, an electronic device, and a storage medium, so as to reduce the temperature measurement error of the cable joint and improve the accuracy of temperature measurement.

[0005] In the first aspect of the embodiments of the present disclosure, a method for detecting the temperature of a cable joint is provided, including:

[0006] Determining a target acquisition duration based on the attributes of the cable joint and the characteristics of the fluorescent material, and determining a target acquisition frequency based on the attributes of the cable joint and the characteristics of the fluorescent material; the fluorescent material is the fluorescent substance in the optical fiber probe of the optical fiber temperature sensor;

[0007] Measuring the temperature of the cable joint based on the target acquisition duration and the target acquisition frequency to obtain a first temperature;

[0008] Calibrating the first temperature based on the environmental information where the cable joint is located to obtain a second temperature of the cable joint.

[0009] In the second aspect of the embodiments of the present disclosure, a device for detecting the temperature of a cable joint is provided, including:

[0010] A first calculation module, configured to determine a target acquisition duration based on the attributes of the cable joint and the characteristics of the fluorescent material, and determine a target acquisition frequency based on the attributes of the cable joint and the characteristics of the fluorescent material; the fluorescent material is the fluorescent substance in the optical fiber probe of the optical fiber temperature sensor.

[0011] A second calculation module, configured to perform temperature measurement on the cable joint based on the target acquisition duration and the target acquisition frequency to obtain a first temperature.

[0012] A calibration module, configured to calibrate the first temperature based on the environmental information where the cable joint is located to obtain a second temperature of the cable joint.

[0013] In a third aspect of the embodiments of the present disclosure, an electronic device is provided, including a memory, a processor, and a computer program stored in the memory and running on the processor. When the processor executes the computer program, the steps of the above-mentioned cable joint temperature detection method are implemented.

[0014] In a fourth aspect of the embodiments of the present disclosure, a computer-readable storage medium is provided. The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the above-mentioned cable joint temperature detection method are implemented.

[0015] The beneficial effects of the cable joint temperature detection method, device, electronic device, and storage medium provided by the embodiments of the present disclosure are as follows:

[0016] Considering the actual situation of optical fiber temperature measurement, the embodiments of the present disclosure first accurately determine the acquisition frequency and acquisition duration according to the self-attributes of the cable joint and the unique characteristics of the fluorescent material in the optical fiber probe, and determine the first temperature according to the acquisition frequency and acquisition duration. Secondly, in order to effectively eliminate interference factors, the environmental information where the cable joint is located is taken into account, and the calculated first temperature is corrected according to the environmental information to obtain the second temperature. This embodiment can accurately determine the measurement parameters and improve the temperature measurement accuracy of the cable joint. Based on the accurate temperature data, the maintenance plan can be reasonably arranged, the equipment replacement cycle can be optimized, the overall service life of the cable joint and the temperature measurement system can be extended, and at the same time, the manpower and material resources for frequent inspections and blind repairs can be saved, and the economic benefits of power operation and maintenance can be improved. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1Schematic flowchart of a cable joint temperature detection method provided by an embodiment of the present disclosure;

[0019] Figure 2 Block diagram of the structure of a cable joint temperature detection device provided by an embodiment of the present disclosure;

[0020] Figure 3 Schematic block diagram of an electronic device provided by an embodiment of the present disclosure. Detailed implementation manners

[0021] In the following description, specific details such as specific system architectures and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present disclosure. However, those skilled in the art should clearly understand that the present disclosure can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details from interfering with the description of the present disclosure.

[0022] To make the objectives, technical solutions, and advantages of the present disclosure clearer, the following will be described through specific embodiments with reference to the accompanying drawings.

[0023] Please refer to Figure 1 , Figure 1 Schematic flowchart of a cable joint temperature detection method provided by an embodiment of the present disclosure. The method includes:

[0024] S101: Determine a target acquisition duration based on the attributes of the cable joint and the characteristics of the fluorescent material, and determine a target acquisition frequency based on the attributes of the cable joint and the characteristics of the fluorescent material; the fluorescent material is the fluorescent substance in the optical fiber probe of the optical fiber temperature sensor.

[0025] In this embodiment, the attributes of the cable joint include joint material, joint size specification, electrical parameters, etc. The joint material can be metal (such as copper, aluminum), plastic, or ceramic, etc. Different materials have different physical properties such as thermal conductivity, electrical conductivity, and coefficient of thermal expansion. For example, metal materials have good thermal conductivity, and heat conducts quickly inside the joint; plastic materials have poor thermal conductivity, heat transfer is relatively slow, and they are prone to expansion when heated; ceramic materials are high-temperature resistant, hard but brittle. These material characteristics will affect the way and speed of heat transfer in the cable joint, and thus affect the process of the optical fiber temperature sensor sensing temperature changes.

[0026] The joint size specifications include size parameters such as the length, diameter, and thickness of the cable joint. Larger-sized joints can lead to uneven heat distribution, longer internal heat conduction paths, and correspondingly longer response times for temperature changes. Electrical parameters such as the working voltage and current-carrying capacity of the cable joint also belong to its properties. Cable joints with high voltage and large current will have more complex temperature changes during operation due to factors such as resistance heating and electromagnetic effects. For example, when current passes through the joint, Joule heat is generated due to the existence of contact resistance. The larger the current, the more heat is generated and the faster the temperature rises. Moreover, in this case, there may also be electromagnetic interference, affecting the normal operation of the fiber optic temperature measurement system.

[0027] The fluorescent material is the fluorescent substance in the fiber optic probe of the fiber optic temperature sensor. The fiber optic probe is the part of the fiber optic temperature sensor that is in direct contact or close contact with the object to be measured (cable joint), and it contains a fluorescent substance inside. When this fluorescent substance is irradiated by an excitation light with a suitable wavelength, it will emit fluorescence. The fluorescence characteristics (such as fluorescence lifetime, emission spectrum, intensity, etc.) of the fluorescent substance will change with temperature, and by detecting these changes in fluorescence characteristics, the temperature of the cable joint can be measured.

[0028] The characteristics of the fluorescent material include fluorescence lifetime characteristics, fluorescence emission spectrum characteristics, fluorescence intensity characteristics, etc.

[0029] The fluorescence lifetime refers to the time required for the fluorescence intensity of the fluorescent substance to decay to 1 / e (about 36.8%) of the initial intensity after the excitation light irradiation stops. Different fluorescent materials have different fluorescence lifetimes, and the fluorescence lifetime will change with temperature.

[0030] The fluorescence emission spectrum refers to the wavelength distribution of the light emitted by the fluorescent substance after being excited. Each fluorescent material has its specific emission spectrum, including parameters such as the emission peak position (peak wavelength) and full width at half maximum (width at half of the emission peak intensity).

[0031] The fluorescence intensity refers to the intensity of the light emitted by the fluorescent substance. It is affected by various factors, such as the excitation light intensity, the concentration of the fluorescent material, and temperature.

[0032] In this embodiment, the properties of the cable joint and the characteristics of the fluorescent material are all factors affecting the measurement of the cable joint temperature by the fiber optic temperature sensor. Determining the target acquisition duration and target acquisition frequency based on the above two characteristics can achieve accurate measurement of the cable joint temperature.

[0033] S102: Measure the temperature of the cable joint based on the target acquisition duration and target acquisition frequency to obtain the first temperature.

[0034] In this embodiment, the target acquisition duration refers to the time length required for the fiber optic temperature sensor to obtain a fluorescence signal that can accurately reflect the temperature of the cable joint when measuring the temperature of the cable joint. The target acquisition frequency refers to the number of times the fiber optic temperature sensor measures the temperature of the cable joint (i.e., acquires the fluorescence signal) per unit time. It is interrelated with the target acquisition duration and jointly determines the accuracy and real-time performance of temperature measurement.

[0035] For example, if the cable joint is made of a plastic material with poor thermal conductivity, it may take a relatively long time for heat to transfer to the position of the fiber optic probe. At the same time, the fluorescence lifetime of the fluorescent material is relatively long and the influence of temperature change on its fluorescence signal is relatively slow. Then, the target acquisition duration needs to be set relatively long to ensure that the change of the fluorescence signal that can accurately reflect the joint temperature can be completely captured.

[0036] If the temperature of the cable joint changes very quickly and the fluorescence signal of the fluorescent material can quickly respond to the temperature change, then a higher acquisition frequency is required to be able to timely capture the rapid temperature change situation and avoid missing important temperature information; conversely, if the temperature change is slow and the fluorescence signal response is also relatively sluggish, the acquisition frequency can be appropriately reduced to reduce the data volume and system resource occupancy.

[0037] In this embodiment, when the fluorescent substance is irradiated by a laser with a specific wavelength, the outer electrons will absorb energy and transition to a higher energy level. After the laser disappears, the electrons will return to the ground state and release energy to generate fluorescence. The decay of the fluorescence afterglow (i.e., the fluorescence lifetime) has a direct relationship with temperature. By measuring the decay of the fluorescence afterglow, the first temperature of the cable joint can be calculated.

[0038] S103: Calibrate the first temperature based on the environmental information of the cable joint to obtain the second temperature of the cable joint.

[0039] In this embodiment, the environmental information of the cable joint includes environmental temperature, environmental humidity, environmental light intensity, etc. These environmental factors will affect the fluorescent substance in the fiber optic probe, thereby affecting the accuracy of temperature measurement. For example, the environmental temperature can change the fluorescence lifetime of the fluorescent substance, the environmental humidity can affect the luminescence efficiency of the fluorescent substance, and the environmental light intensity may interfere with the detection of the fluorescence signal.

[0040] To obtain a more accurate temperature of the cable joint, it is necessary to calibrate the first temperature according to the environmental information. This involves establishing a relationship model between environmental factors and temperature deviation. For example, through experiments or theoretical analysis, determine the quantitative relationship between environmental temperature change and fluorescence lifetime change, or the relationship between environmental light intensity and fluorescence signal interference degree. Then, correct the first temperature according to these relationships to obtain the calibrated temperature value, that is, the second temperature.

[0041] As can be seen from the above, in this embodiment, considering the actual situation of optical fiber temperature measurement, the acquisition frequency and acquisition duration are accurately determined first according to the inherent attributes of the cable joint and the unique characteristics of the fluorescent material in the optical fiber probe, and the first temperature is determined based on the acquisition frequency and acquisition duration. Secondly, in order to effectively eliminate interference factors, the environmental information of the cable joint is taken into account, and the calculated first temperature is corrected according to the environmental information to obtain the second temperature. This embodiment can accurately determine the measurement parameters and improve the temperature measurement accuracy of the cable joint. Based on the accurate temperature data, the maintenance plan can be reasonably arranged, the equipment replacement cycle can be optimized, the overall service life of the cable joint and the temperature measurement system can be extended, and at the same time, the manpower and material resources for frequent inspections and blind repairs can be saved, and the economic benefits of power operation and maintenance can be improved.

[0042] In one embodiment of the present disclosure, the attributes of the cable joint include the joint material;

[0043] Determining the target acquisition duration based on the attributes of the cable joint and the characteristics of the fluorescent material, and determining the target acquisition frequency based on the attributes of the cable joint and the characteristics of the fluorescent material, includes:

[0044] Determining the first acquisition duration based on the characteristics of the fluorescent material, updating the first acquisition duration based on the joint material to obtain the first target acquisition duration, and taking the first target acquisition duration as the target acquisition duration;

[0045] Determining the first acquisition frequency based on the characteristics of the fluorescent material, updating the first acquisition frequency based on the joint material to obtain the first target acquisition frequency; taking the first target acquisition frequency as the target acquisition frequency.

[0046] In this embodiment, the attributes of the cable joint include the joint material. The joint material includes metal, plastic, and ceramic. The thermal conductivity of the metal material cable joint is greater than that of the ceramic material cable joint, and the thermal conductivity of the ceramic material cable joint is greater than that of the plastic cable joint. Because there are a large number of free electrons inside the metal, these free electrons can move quickly between the lattices when heated, thus effectively transferring heat, so the thermal conductivity of the metal is the highest. Plastic is an organic material composed of macromolecular chains, and the molecular chains are mainly interacted with each other by weak van der Waals forces. This structure makes the heat transfer inside the plastic mainly rely on the vibration of molecules, without an efficient heat transfer mechanism like the free electrons in the metal. Therefore, the thermal conductivity of the plastic cable joint is the lowest.

[0047] In this embodiment, the characteristics of the fluorescent material include the sensitivity curve of the fluorescence lifetime varying with temperature.

[0048] Determining the first acquisition duration based on the characteristics of the fluorescent material, includes:

[0049] The preset duration is corrected based on the sensitivity curve of the fluorescence lifetime varying with temperature to obtain the first acquisition duration;

[0050] Determine the first acquisition frequency based on the characteristics of the fluorescent material, including:

[0051] The preset frequency is corrected based on the sensitivity curve of the fluorescence lifetime varying with temperature to obtain the first acquisition frequency.

[0052] Among them, the preset duration is the acquisition duration of the fluorescent material at room temperature (25 °C). The sensitivity curve of the fluorescence lifetime varying with temperature is a curve that describes the relationship between the optical properties of the fluorescent material and temperature. It shows how the fluorescence lifetime of the fluorescent material changes under different temperature conditions and reflects the sensitivity of this change. The fluorescence lifetime refers to the time required for the fluorescence intensity of the fluorescent substance to decay to 1 / e (about 36.8%) of the initial intensity after the excitation light irradiation stops.

[0053] For example, if the sensitivity of the fluorescent material changes gently in the low-temperature range and changes sharply in the high-temperature range, the acquisition duration can be shortened to 60%-80% of the preset duration in the high-temperature area and the acquisition frequency can be increased to 1-2 times the preset frequency to accurately track the rapid temperature fluctuations of the cable joint at high temperature.

[0054] Update the first acquisition duration based on the joint material to obtain the first target acquisition duration, including:

[0055] If the joint material is a metal material, update the first acquisition duration according to the first step length to obtain the first target acquisition duration.

[0056] If the joint material is a ceramic material, update the first acquisition duration according to the second step length to obtain the first target acquisition duration.

[0057] If the joint material is a plastic material, update the first acquisition duration according to the third step length to obtain the first target acquisition duration. The first step length is less than the second step length, and the second step length is less than the third step length.

[0058] Update the first acquisition frequency based on the joint material to obtain the first target acquisition frequency, including: If the joint material is a metal material, update the first acquisition frequency according to the fourth step length to obtain the first target acquisition frequency.

[0059] If the joint material is a ceramic material, update the first acquisition frequency according to the fifth step length to obtain the first target acquisition frequency.

[0060] If the joint material is a plastic material, update the first acquisition frequency according to the sixth step length to obtain the first target acquisition frequency.

[0061] The fourth step length is greater than the fifth step length, and the fifth step length is greater than the sixth step length.

[0062] In this embodiment, if the joint material is a metal material, the thermal conductivity is high, and the temperature value of the cable joint can be measured without a long acquisition time. Therefore, the first step length is less than the second step length. For example, if the first acquisition time is 10 seconds, the first step length can be 2 seconds; if the first acquisition time is 20 seconds, the second step length can be 5 seconds; if the first acquisition time is 30 seconds, the third step length can be 30 seconds.

[0063] If the joint material is a metal material, the temperature change is quickly transmitted to the fiber optic probe, and the temperature change is relatively frequent and rapid. In order to be able to capture these rapid temperature changes in a timely manner, the fourth step length is a relatively large frequency adjustment amount for increasing the acquisition frequency. Such a high acquisition frequency can better track the rapidly changing temperature of the metal joint and ensure that no important temperature fluctuation information is missed.

[0064] From the above, it can be concluded that in this embodiment, by comprehensively considering the joint material of the cable joint and the characteristics of the fluorescent material, the target acquisition time and the target acquisition frequency are accurately determined. This method can ensure that the collected data fully reflects the joint state and avoids unnecessary resource waste. By making personalized adjustments to the acquisition parameters based on the joint material, the pertinence and efficiency of data acquisition are improved, providing more reliable data support for the condition monitoring and maintenance of cable joints.

[0065] In an embodiment of the present disclosure, the attributes of the cable joint include the joint size specification;

[0066] Determining the target acquisition time based on the attributes of the cable joint and the characteristics of the fluorescent material, and determining the target acquisition frequency based on the attributes of the cable joint and the characteristics of the fluorescent material, includes:

[0067] Determining the first acquisition time based on the characteristics of the fluorescent material, updating the first acquisition time based on the joint size specification to obtain the second target acquisition time, and using the second target acquisition time as the target acquisition time;

[0068] Determining the first acquisition frequency based on the characteristics of the fluorescent material, updating the first acquisition frequency based on the joint size specification to obtain the second target acquisition frequency, and using the second target acquisition frequency as the target acquisition frequency.

[0069] In this embodiment, updating the first acquisition time based on the joint size specification to obtain the second target acquisition time includes:

[0070] When the length of the cable joint is greater than the first length, or the diameter of the cable joint is greater than the first diameter, or the thickness of the cable joint is greater than the first thickness, then the first acquisition duration plus the increased duration equals the second target acquisition duration. The first acquisition frequency multiplied by the adjustment coefficient gives the second target acquisition frequency.

[0071] When the length of the cable joint is less than the first length, or the diameter of the cable joint is less than the first diameter, or the thickness of the cable joint is less than the first thickness, then the first acquisition duration minus the increased duration equals the second target acquisition duration. The first acquisition frequency divided by the adjustment coefficient gives the second target acquisition frequency.

[0072] For example, for large-sized connectors, based on the time-delay characteristic of heat conduction inside them and the hysteresis of the temperature response of the fluorescent material, the original acquisition duration of 5 seconds is increased by 2 seconds to obtain the second target acquisition duration; the acquisition frequency is increased to twice the original to obtain the second target acquisition frequency, ensuring timely and comprehensive temperature information acquisition.

[0073] It can be concluded from the above that in this embodiment, by combining the size specifications of the cable joint and the characteristics of the fluorescent material, the target acquisition duration and acquisition frequency are scientifically set, ensuring that the data acquisition process is both efficient and accurate, and can comprehensively reflect the actual situation of connectors of different sizes.

[0074] In an embodiment of the present disclosure, the cable joint temperature detection method is applied to a distributed cable joint detection system;

[0075] Determining the target acquisition duration based on the attributes of the cable joint and the characteristics of the fluorescent material, and determining the target acquisition frequency based on the attributes of the cable joint and the characteristics of the fluorescent material, includes:

[0076] Determining the second acquisition duration based on the attributes of the cable joint and the characteristics of the fluorescent material, and updating the second acquisition duration based on the heat conduction characteristics between adjacent cable joints to obtain the target acquisition duration;

[0077] Determining the second acquisition frequency based on the attributes of the cable joint and the characteristics of the fluorescent material, and updating the second acquisition frequency based on the heat conduction characteristics between adjacent cable joints to obtain the target acquisition frequency.

[0078] In this embodiment, in the distributed cable joint monitoring system, there are multiple cable joints, which are interconnected to form a complex network. The temperature of each cable joint is very important because the abnormal temperature of one joint may affect the operation of the entire system. Therefore, it is necessary to monitor the temperature of multiple joints simultaneously.

[0079] During the operation of a cable joint, heat is generated, and adjacent cable joints will affect each other due to heat conduction. For example, when the temperature of one joint increases, heat will be conducted to adjacent joints through the cable itself or the surrounding medium, resulting in a change in the temperature of the adjacent joints. This heat conduction interference makes the temperature of each joint no longer independent but correlated. If the heat conduction interference between adjacent joints is not considered when determining the acquisition duration and frequency, the true temperature of each joint cannot be accurately measured. For example, misjudging the temperature change of a joint due to the heat conduction of adjacent joints, or failing to capture the temperature fluctuations caused by heat conduction in a timely manner.

[0080] Finite element simulation of heat conduction is a method to analyze heat conduction phenomena through computer modeling. By dividing the cable joint and its surrounding environment into many small elements (finite elements) and setting the material properties (such as thermal conductivity, specific heat capacity, etc.), boundary conditions (such as surface heat dissipation) and initial conditions (such as initial temperature) of each element, the heat conduction process between joints and between the joints and the surrounding environment can be simulated.

[0081] Using the results of the finite element simulation of heat conduction, the specific situation of heat conduction between adjacent joints can be understood, including the direction and intensity of heat flow and the change law of temperature distribution, etc. According to these simulation results, the acquisition parameters (acquisition duration and acquisition frequency) corresponding to the fiber optic sensor of each joint can be adjusted differentially. For example, if the simulation results show that a certain joint is greatly affected by the heat conduction of adjacent joints, it is necessary to shorten the acquisition duration to capture temperature changes more quickly, or increase the acquisition frequency to monitor temperature fluctuations more precisely.

[0082] It can be concluded from the above that in this embodiment, after determining the initial acquisition parameters according to the joint attributes and fluorescent material characteristics, the initial acquisition parameters can be updated in combination with the influence of the heat conduction characteristics of adjacent joints to obtain the final acquisition parameters. This method avoids data deviation caused by unified setting and makes temperature measurement more accurate.

[0083] In an embodiment of the present disclosure, the environmental information includes environmental temperature, environmental humidity, and environmental light intensity;

[0084] Calibrating the first temperature based on the environmental information where the cable joint is located to obtain the second temperature of the cable joint includes:

[0085] Calibrating the first temperature based on the environmental temperature, environmental humidity, and environmental light intensity where the cable joint is located to obtain the second temperature of the cable joint.

[0086] In this embodiment, the environmental information where the cable joint is located includes three key pieces of information: environmental temperature, environmental humidity, and environmental light intensity. The environmental temperature is directly related to the heat exchange between the joint and the outside world, affecting the temperature state of the joint itself; the environmental humidity affects the performance of the optical fiber probe and the fluorescent material. For example, a change in humidity can change the fluorescence efficiency or cause water vapor interference on the surface of the probe; the environmental light intensity is easily mixed into the detection optical path, making the intensity of the fluorescence signal inaccurate.

[0087] Based on the above multi-dimensional environmental information, the first temperature is calibrated to obtain the second temperature. For the environmental temperature, according to its variation laws with the fluorescence lifetime and intensity as the environmental temperature changes, the measurement deviation caused by abnormal temperature differences is corrected. In terms of environmental humidity, the relationship between humidity and fluorescence characteristics and heat conduction is modeled to compensate for the interference of humidity on the probe temperature. For the environmental light intensity, light interference can be excluded through spectral analysis, shading to subtract the background, etc., and the second temperature is obtained through comprehensive adjustment.

[0088] In this embodiment, the first temperature is calibrated according to the first formula to obtain the second temperature of the cable joint. The first formula is:

[0089]

[0090] where T2 represents the second temperature, T1 represents the first temperature, k1 represents the correction coefficient related to the influence of the environmental temperature in the i-th environmental temperature interval, dimensionless; k2 represents the correction coefficient related to the influence of the environmental humidity in the j-th environmental humidity interval; k3 represents the correction coefficient related to the influence of the environmental light intensity in the l-th environmental light intensity interval; n represents the number of different environmental temperature intervals divided, m represents the number of different environmental humidity intervals divided, p represents the number of different environmental light intensity intervals divided, and n, m, and p are all positive integers; represents the rate of change of the fluorescence lifetime with temperature, represents the measured value of the environmental temperature, represents the environmental temperature reference value set under ideal and standard interference-free conditions, represents the time weight factor of the influence of the temperature change duration on the temperature deviation in the i-th environmental temperature interval;

[0091] represents the rate of change of the fluorescence intensity with the environmental humidity, represents the current humidity value of the environment where the cable joint is located obtained by actual measurement, dimensionless, represents the reference environmental humidity value for calibration, which is the humidity reference value under the set standard interference-free environment, represents the time weight factor of the influence of the humidity change duration on the temperature deviation in the j-th environmental humidity interval;

[0092] Represents the rate of change of fluorescence intensity with respect to ambient light intensity, Represents the intensity value of the current ambient light at the fluorescence emission wavelength in the environment where the cable joint is actually measured, Represents the intensity value of the reference ambient light for calibration at the fluorescence emission wavelength, which is the light intensity reference value in a set standard interference-free environment, Represents the time weighting factor of the influence of the light intensity change duration on the temperature deviation within the l-th ambient light intensity interval.

[0093] It can be concluded from the above that in this embodiment, considering the ambient temperature, it can correct the problems of changes in fluorescence characteristics and inaccurate measurement caused by external cold and warm differences, and ensure that the measured temperature reflects the true temperature of the cable joint. In this embodiment, considering the ambient humidity, it compensates for its influence on fluorescence efficiency and heat conduction to avoid humidity interference in temperature measurement. This embodiment also considers the influence of ambient light intensity and excludes the interference of light mixing on the measurement of fluorescence signals.

[0094] In an embodiment of the present disclosure, calibrating the first temperature based on the ambient temperature, ambient humidity, and ambient light intensity where the cable joint is located to obtain the second temperature of the cable joint includes:

[0095] Constructing a temperature-fluorescent material fluorescence efficiency correction curve, a humidity-fluorescent material fluorescence efficiency correction curve, and an ambient light intensity-fluorescent material fluorescence efficiency correction curve;

[0096] Obtaining a first calibration quantity based on the temperature-fluorescent material fluorescence efficiency correction curve and the ambient temperature where the cable joint is located; obtaining a second calibration quantity based on the humidity-fluorescent material fluorescence efficiency correction curve and the ambient humidity where the cable joint is located; obtaining a third calibration quantity based on the ambient light intensity-fluorescent material fluorescence efficiency correction curve and the ambient light intensity where the cable joint is located;

[0097] Calibrating the first temperature based on the first weight corresponding to the first calibration quantity, the second weight corresponding to the second calibration quantity, and the third weight corresponding to the third calibration quantity to obtain the second temperature of the cable joint.

[0098] In this embodiment, the temperature-fluorescent material fluorescence efficiency correction curve: This curve describes the relationship between the ambient temperature and the fluorescence efficiency of the fluorescent material. Temperature affects the molecular motion and energy level structure of the fluorescent material, thereby changing the fluorescence efficiency. For example, as the temperature increases, the molecular vibration of the fluorescent material intensifies, which may lead to an increase in non-radiative transitions and a decrease in fluorescence efficiency. By constructing this curve, this influence can be quantified. Measuring the fluorescence efficiency of the fluorescent material at different temperature points and then fitting these data points to form a curve can obtain the corresponding relationship between temperature and fluorescence efficiency.

[0099] Humidity-Fluorescent Material Fluorescence Efficiency Correction Curve: The ambient humidity mainly affects the fluorescence efficiency by changing the medium environment around the fluorescent material. In a high-humidity environment, water molecules are adsorbed on the surface of the fluorescent material, and these water molecules may interact with the fluorescent material, changing its optical properties. By constructing the humidity-fluorescence efficiency correction curve, the quantitative relationship between humidity changes and fluorescence efficiency changes can be found. Through experiments under different humidity conditions, the fluorescence efficiency is measured, and then the correlation curve between humidity and fluorescence efficiency is obtained for subsequent correction of the fluorescence efficiency according to the actual humidity situation.

[0100] Ambient Light Intensity-Fluorescent Material Fluorescence Efficiency Correction Curve: The ambient light intensity interferes with the detection of the fluorescence signal. When there is strong light in the emission wavelength range of the fluorescent material, the intensity of the detected fluorescence signal will change. By constructing this curve, the relationship between the ambient light intensity and the fluorescence efficiency can be clarified. Under different ambient light intensities, the true fluorescence efficiency of the fluorescent material is measured to obtain the ambient light intensity-fluorescence efficiency curve for correcting the fluorescence efficiency deviation caused by the ambient light.

[0101] In this embodiment, first, the ambient temperature, ambient humidity, and ambient light intensity data of the cable joint are obtained through temperature sensors, humidity sensors, and light intensity sensors installed near the cable joint. According to the above-constructed correction curves, when the real-time value of the ambient temperature is obtained, the corresponding fluorescence efficiency change amount can be found from the temperature-fluorescence efficiency correction curve. Similarly, for the real-time detection values of the ambient humidity and ambient light intensity, the fluorescence efficiency change amounts caused by them can also be obtained from the corresponding correction curves respectively. These change amounts together reflect the attenuation deviation of the fluorescence signal due to environmental factors. Since the attenuation deviation of the fluorescence signal is caused by environmental factors and the fluorescence signal intensity is associated with the temperature measurement (the first temperature), the first temperature can be calibrated by correcting the attenuation deviation of the fluorescence signal. For example, if the fluorescence signal decays due to environmental factors, resulting in a lower first temperature calculated based on the fluorescence signal intensity, then by compensating the attenuation deviation in the reverse direction, a more accurate second temperature can be obtained, and this second temperature is closer to the real temperature of the cable joint.

[0102] Exemplarily, the second temperature of the cable joint can be calibrated based on the first weight corresponding to the first calibration quantity, the second weight corresponding to the second calibration quantity, and the third weight corresponding to the third calibration quantity for the first temperature.

[0103] For example, if the first temperature is T1, the first calibration quantity is Δa, the second calibration quantity is Δb, the third calibration quantity is Δc, the first weight is w1, the second weight is w2, and the third weight is w3, then the second temperature is:

[0104] T2 = T1 + w1×Δa + w2×Δb + w3×Δc

[0105] Different weights represent different degrees of influence on temperature. The larger the weight, the greater the influence, and the smaller the weight, the smaller the influence.

[0106] It can be concluded from the above that in this embodiment, by constructing three correction curves, the influence of environmental factors on the fluorescence efficiency of the fluorescent material can be accurately quantified.

[0107] Corresponding to the cable joint temperature detection method in the above embodiment, Figure 2 is a structural block diagram of a cable joint temperature detection device provided by an embodiment of the present disclosure. For the sake of illustration, only the parts related to the embodiments of the present disclosure are shown. Refer to Figure 2 The cable joint temperature detection device 20 includes: a first calculation module 21, a second calculation module 22, and a calibration module 23.

[0108] Among them, the first calculation module 21 is used to determine the target acquisition duration based on the attributes of the cable joint and the characteristics of the fluorescent material, and determine the target acquisition frequency based on the attributes of the cable joint and the characteristics of the fluorescent material; the fluorescent material is the fluorescent substance in the optical fiber probe of the optical fiber temperature sensor;

[0109] The second calculation module 22 is used to measure the temperature of the cable joint based on the target acquisition duration and the target acquisition frequency to obtain the first temperature;

[0110] The calibration module 23 is used to calibrate the first temperature based on the environmental information where the cable joint is located to obtain the second temperature of the cable joint.

[0111] In an embodiment of the present disclosure, the attributes of the cable joint include the joint material; the first calculation module 21 is specifically used for:

[0112] Determine the first acquisition duration based on the characteristics of the fluorescent material, update the first acquisition duration based on the joint material to obtain the first target acquisition duration, and use the first target acquisition duration as the target acquisition duration;

[0113] Determine the first acquisition frequency based on the characteristics of the fluorescent material, update the first acquisition frequency based on the joint material to obtain the first target acquisition frequency; use the first target acquisition frequency as the target acquisition frequency.

[0114] In an embodiment of the present disclosure, the attributes of the cable joint include the joint size specification; the first calculation module 21 is specifically used for:

[0115] Determine the first acquisition duration based on the characteristics of the fluorescent material, update the first acquisition duration based on the joint size specification to obtain the second target acquisition duration, and use the second target acquisition duration as the target acquisition duration;

[0116] Determine the first acquisition frequency based on the characteristics of the fluorescent material, update the first acquisition frequency based on the joint size specification to obtain the second target acquisition frequency, and use the second target acquisition frequency as the target acquisition frequency.

[0117] In an embodiment of the present disclosure, the characteristics of the fluorescent material include the sensitivity curve of the fluorescence lifetime varying with temperature;

[0118] The first calculation module 21 is specifically configured to:

[0119] Correct the preset duration based on the sensitivity curve of the fluorescence lifetime varying with temperature to obtain the first acquisition duration;

[0120] Correct the preset frequency based on the sensitivity curve of the fluorescence lifetime varying with temperature to obtain the first acquisition frequency.

[0121] In an embodiment of the present disclosure, the cable joint temperature detection method is applied to a distributed cable joint detection system; the first calculation module 21 is specifically configured to:

[0122] Determine the second acquisition duration based on the attributes of the cable joint and the characteristics of the fluorescent material, and update the second acquisition duration based on the heat conduction characteristics between adjacent cable joints to obtain the target acquisition duration;

[0123] Determine the second acquisition frequency based on the attributes of the cable joint and the characteristics of the fluorescent material, and update the second acquisition frequency based on the heat conduction characteristics between adjacent cable joints to obtain the target acquisition frequency.

[0124] In an embodiment of the present disclosure, the environmental information includes environmental temperature, environmental humidity, and ambient light intensity;

[0125] The calibration module 23 is specifically configured to:

[0126] Calibrate the first temperature based on the environmental temperature, environmental humidity, and ambient light intensity where the cable joint is located to obtain the second temperature of the cable joint.

[0127] In an embodiment of the present disclosure, the calibration module 23 is specifically configured to:

[0128] Construct a temperature-fluorescent material fluorescence efficiency correction curve, a humidity-fluorescent material fluorescence efficiency correction curve, and an ambient light intensity-fluorescent material fluorescence efficiency correction curve;

[0129] Obtain the first calibration quantity based on the temperature-fluorescent material fluorescence efficiency correction curve and the environmental temperature where the cable joint is located; obtain the second calibration quantity based on the humidity-fluorescent material fluorescence efficiency correction curve and the environmental humidity where the cable joint is located; obtain the third calibration quantity based on the ambient light intensity-fluorescent material fluorescence efficiency correction curve and the ambient light intensity where the cable joint is located;

[0130] The first temperature is calibrated based on the first weight corresponding to the first calibration quantity, the second weight corresponding to the second calibration quantity, and the third weight corresponding to the third calibration quantity to obtain the second temperature of the cable joint.

[0131] See Figure 3 , Figure 3 which is a schematic block diagram of an electronic device provided by an embodiment of the present disclosure. As Figure 3 shown, the electronic device 300 in this embodiment may include: one or more processors 301, one or more input devices 302, one or more output devices 303, and one or more memories 304. The above-mentioned processors 301, input devices 302, output devices 303, and memories 304 communicate with each other through a communication bus 305. The memory 304 is used to store computer programs, and the computer programs include program instructions. The processor 301 is used to execute the program instructions stored in the memory 304. Among them, the processor 301 is configured to call the program instructions to execute the functions of each module / unit in the above-mentioned device embodiments, such as Figure 2 the functions of the modules 21 to 23 shown.

[0132] It should be understood that in the embodiments of the present disclosure, the so-called processor 301 may be a central processing unit (CPU), and this processor may also be other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or this processor may also be any conventional processor, etc.

[0133] The input device 302 may include a touchpad, a fingerprint acquisition sensor (for acquiring the fingerprint information and the fingerprint direction information of the user), a microphone, etc., and the output device 303 may include a display (such as an LCD), a speaker, etc.

[0134] The memory 304 may include a read-only memory and a random access memory, and provide instructions and data to the processor 301. A part of the memory 304 may also include a non-volatile random access memory. For example, the memory 304 may also store information about the device type.

[0135] In a specific implementation, the processor 301, input device 302, and output device 303 described in the embodiments of the present disclosure may execute the implementation manners described in the first and second embodiments of the cable joint temperature detection method provided by the embodiments of the present disclosure, and may also execute the implementation manner of the electronic device described in the embodiments of the present disclosure, which will not be elaborated herein.

[0136] In another embodiment of the present disclosure, a computer-readable storage medium is provided. The computer-readable storage medium stores a computer program, and the computer program includes program instructions. When the program instructions are executed by a processor, all or part of the processes in the method of the foregoing embodiments are implemented. It can also be completed by instructing relevant hardware through the computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by the processor, the steps of the foregoing method embodiments can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in the form of source code, object code, executable file, or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disc, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electrical carrier signal, telecommunication signal, and software distribution medium, etc.

[0137] The computer-readable storage medium may be an internal storage unit of the electronic device in any of the foregoing embodiments, such as the hard disk or memory of the electronic device. The computer-readable storage medium may also be an external storage device of the electronic device, such as a plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, etc. equipped on the electronic device. Further, the computer-readable storage medium may also include both the internal storage unit and the external storage device of the electronic device. The computer-readable storage medium is used to store the computer program and other programs and data required by the electronic device. The computer-readable storage medium may also be used to temporarily store the data that has been output or will be output.

[0138] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described according to functions in the above description. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of this disclosure.

[0139] Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the above-described electronic devices and units can refer to the corresponding processes in the foregoing method embodiments and will not be elaborated herein.

[0140] In several embodiments provided in this application, it should be understood that the disclosed electronic devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of units is only a logical function division, and there can be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed couplings or direct couplings or communication connections to each other can be indirect couplings or communication connections through some interfaces or units, or can also be electrical, mechanical, or other forms of connection.

[0141] The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiments of this disclosure.

[0142] In addition, the functional units in each embodiment of this disclosure can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

[0143] The above is only the specific implementation manner of this disclosure, but the protection scope of this disclosure is not limited thereto. Any person skilled in the art can easily think of various equivalent modifications or substitutions within the technical scope disclosed by this disclosure, and these modifications or substitutions should be covered within the protection scope of this disclosure. Therefore, the protection scope of this disclosure should be subject to the protection scope of the claims.

Claims

1. A method for detecting the temperature of a cable joint, characterized in that Including: Determine a target acquisition duration based on the properties of the cable joint and the characteristics of the fluorescent material, and determine a target acquisition frequency based on the properties of the cable joint and the characteristics of the fluorescent material; the fluorescent material is the fluorescent substance in the optical fiber probe of the optical fiber temperature sensor; Perform temperature measurement on the cable joint based on the target acquisition duration and the target acquisition frequency to obtain a first temperature; Calibrate the first temperature based on the ambient temperature, ambient humidity, and ambient light intensity of the cable joint according to a first formula to obtain a second temperature of the cable joint; Wherein, the first formula is: Wherein, T2 represents the second temperature, T1 represents the first temperature, k1 represents the correction coefficient related to the influence of the ambient temperature in the i-th ambient temperature range; k2 represents the correction coefficient related to the influence of the ambient humidity in the j-th ambient humidity range; k3 represents the correction coefficient related to the influence of the ambient light intensity in the l-th ambient light intensity range; n represents the number of different ambient temperature ranges divided, m represents the number of different ambient humidity ranges divided, and p represents the number of different ambient light intensity ranges divided; represents the rate of change of the fluorescence lifetime with temperature, represents the measured value of the ambient temperature, represents the reference value of the ambient temperature set under ideal and standard interference-free conditions, represents the time weight factor of the influence of the temperature change duration on the temperature deviation in the i-th ambient temperature range; represents the rate of change of fluorescence intensity with respect to the ambient humidity, represents the current humidity value of the environment where the cable joint is located as actually measured, represents the reference ambient humidity value for calibration, which is the humidity reference value in a set standard interference-free environment, represents the time-weighting factor of the influence of the humidity change duration on the temperature deviation within the j-th ambient humidity range; Represents the rate of change of fluorescence intensity with respect to the ambient light intensity, Represents the intensity value of the current ambient light at the fluorescence emission wavelength in the environment where the cable joint is actually measured, Represents the intensity value of the reference ambient light for calibration at the fluorescence emission wavelength, which is the light intensity reference value in a set standard interference-free environment, Represents the time weight factor of the influence of the light intensity change duration on the temperature deviation within the l-th ambient light intensity interval.

2. The cable joint temperature detection method according to claim 1, wherein, The properties of the cable joint include the joint material; The determining the target acquisition duration based on the properties of the cable joint and the characteristics of the fluorescent material, and determining the target acquisition frequency based on the properties of the cable joint and the characteristics of the fluorescent material includes: Determine a first acquisition duration based on the characteristics of the fluorescent material, update the first acquisition duration based on the joint material to obtain a first target acquisition duration, and use the first target acquisition duration as the target acquisition duration; Determine a first acquisition frequency based on the characteristics of the fluorescent material, update the first acquisition frequency based on the joint material to obtain a first target acquisition frequency; use the first target acquisition frequency as the target acquisition frequency.

3. The cable joint temperature detection method according to claim 1, characterized in that, The properties of the cable joint include the joint size specification; The determining the target acquisition duration based on the properties of the cable joint and the characteristics of the fluorescent material, and determining the target acquisition frequency based on the properties of the cable joint and the characteristics of the fluorescent material includes: Determine a first acquisition duration based on the characteristics of the fluorescent material, update the first acquisition duration based on the joint size specification to obtain a second target acquisition duration, and use the second target acquisition duration as the target acquisition duration; Determine a first acquisition frequency based on the characteristics of the fluorescent material, update the first acquisition frequency based on the joint size specification to obtain a second target acquisition frequency, and use the second target acquisition frequency as the target acquisition frequency.

4. The cable joint temperature detection method according to claim 2 or 3, characterized in that The characteristics of the fluorescent material include a sensitivity curve of the fluorescence lifetime varying with temperature; The determining the first acquisition duration based on the characteristics of the fluorescent material includes: Correct a preset duration based on the sensitivity curve of the fluorescence lifetime varying with temperature to obtain a first acquisition duration; The determining the first acquisition frequency based on the characteristics of the fluorescent material includes: Correct a preset frequency based on the sensitivity curve of the fluorescence lifetime varying with temperature to obtain a first acquisition frequency.

5. The cable joint temperature detection method according to claim 1, characterized in that, The cable joint temperature detection method is applied to a distributed cable joint detection system; The determining the target acquisition duration based on the properties of the cable joint and the characteristics of the fluorescent material, and determining the target acquisition frequency based on the properties of the cable joint and the characteristics of the fluorescent material includes: Determine a second acquisition duration based on the properties of the cable joint and the characteristics of the fluorescent material, and update the second acquisition duration based on the heat conduction characteristics between adjacent cable joints to obtain the target acquisition duration; Determine a second acquisition frequency based on the properties of the cable joint and the characteristics of the fluorescent material, and update the second acquisition frequency based on the heat conduction characteristics between adjacent cable joints to obtain the target acquisition frequency.

6. A cable joint temperature detection device, characterized in that, Including: The first calculation module is configured to determine a target acquisition duration based on the attributes of the cable joint and the characteristics of the fluorescent material, and determine a target acquisition frequency based on the attributes of the cable joint and the characteristics of the fluorescent material; the fluorescent material is a fluorescent substance in the optical fiber probe of the optical fiber temperature sensor; The second calculation module is configured to measure the temperature of the cable joint based on the target acquisition duration and the target acquisition frequency to obtain a first temperature; The calibration module is configured to calibrate the first temperature according to a first formula based on the ambient temperature, ambient humidity, and ambient light intensity of the cable joint to obtain a second temperature of the cable joint; Wherein, the first formula is: Wherein, T2 represents the second temperature, T1 represents the first temperature, k1 represents the correction coefficient related to the influence of the ambient temperature within the i-th ambient temperature range; k2 represents the correction coefficient related to the influence of the ambient humidity within the j-th ambient humidity range; k3 represents the correction coefficient related to the influence of the ambient light intensity within the l-th ambient light intensity range; n represents the number of different ambient temperature ranges divided, m represents the number of different ambient humidity ranges divided, and p represents the number of different ambient light intensity ranges divided; represents the rate of change of the fluorescence lifetime with temperature, represents the measured value of the ambient temperature, represents the ambient temperature reference value set under ideal and standard interference-free conditions, represents the time weight factor of the influence of the temperature change duration on the temperature deviation within the i-th ambient temperature range; represents the rate of change of fluorescence intensity with respect to environmental humidity, represents the current humidity value of the environment where the cable joint is located obtained from actual measurement, represents the reference environmental humidity value for calibration, which is the humidity reference value in a set standard interference-free environment, represents the time weight factor of the influence of the humidity change duration on the temperature deviation within the j-th environmental humidity range; Represents the rate of change of fluorescence intensity with respect to ambient light intensity, Represents the intensity value of the current ambient light at the fluorescence emission wavelength in the environment where the cable joint is actually measured, Represents the intensity value of the reference ambient light for calibration at the fluorescence emission wavelength, which is the light intensity reference value in a set standard interference-free environment, Represents the time weight factor of the influence of the duration of light intensity change on the temperature deviation within the l-th ambient light intensity interval.

7. An electronic device, comprising a memory, a processor, and a computer program stored in the memory and running on the processor, characterized in that, When the processor executes the computer program, the steps of the method according to any one of claims 1 to 5 are implemented.

8. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, the steps of the method according to any one of claims 1 to 5 are implemented.

Images