Cable joint temperature detection method and device, electronic equipment and storage medium

Abstract

The invention provides a cable joint temperature detection method and device, electronic equipment and a storage medium, and belongs to the technical field of optical fiber temperature measurement, and the method comprises the steps: determining a target collection duration based on the attributes of a cable joint and the characteristics of a fluorescent material, and determining a target collection frequency based on the attributes of the cable joint and the characteristics of the fluorescent material; the fluorescent material is a fluorescent substance in an optical fiber probe of the optical fiber temperature measurement 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 environment information of the cable joint to obtain a second temperature of the cable joint. According to the invention, the temperature measurement error of the cable joint can be reduced, and the temperature measurement accuracy is improved.

Description

Technical Field

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

[0002] In modern power transmission, industrial electrical equipment operation, and various complex scenarios involving the use of cables, cable joints are key connection parts of cable lines, and the stability of their operating status plays a vital role in the safety and reliability of the entire system. Cable joints are easily affected by many factors such as contact resistance, heat dissipation conditions, and load current fluctuations. Abnormal temperature rise is very likely to occur in cable joints. Once the temperature is out of control and exceeds the safety threshold, it may cause accelerated insulation aging, short circuit failures, and even cause fires, large-scale power outages and other serious consequences, causing huge losses and inconveniences to production and life.

[0003] Traditional methods for monitoring cable joint temperature have many limitations. For example, the temperature measurement method based on thermocouples and thermal resistors requires close physical contact between these contact temperature measuring elements and the object being measured. However, these elements will destroy the contact stability due to long-term vibration and thermal expansion and contraction of the cable joint, resulting in increased temperature measurement errors. Summary of the invention

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

[0005] A first aspect of an embodiment of the present disclosure provides a cable joint temperature detection method, comprising: The target acquisition duration is determined based on the properties of the cable connector and the characteristics of the fluorescent material, and the target acquisition frequency is determined based on the properties of the cable connector 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; Measuring the temperature of the cable joint based on the target acquisition duration and the target acquisition frequency to obtain a first temperature; The first temperature is calibrated based on the environmental information of the cable connector to obtain the second temperature of the cable connector.

[0006] A second aspect of the embodiments of the present disclosure provides a cable joint temperature detection device, comprising: A first calculation module is used to determine the target acquisition duration based on the properties of the cable connector and the characteristics of the fluorescent material, and to determine the target acquisition frequency based on the properties of the cable connector 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; A second calculation module, 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; A calibration module is used to calibrate the first temperature based on the environmental information of the cable connector to obtain a second temperature of the cable connector.

[0007] According to a third aspect of an embodiment of the present disclosure, an electronic device is provided, comprising a memory, a processor, and a computer program stored in the memory and running on the processor, wherein the processor implements the steps of the above-mentioned cable connector temperature detection method when executing the computer program.

[0008] According to a fourth aspect of the embodiments of the present disclosure, a computer-readable storage medium is provided, wherein 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.

[0009] The cable joint temperature detection method and device, electronic device, and storage medium provided by the embodiments of the present disclosure have the following beneficial effects: The disclosed embodiment takes into account the actual situation of fiber optic temperature measurement. First, the acquisition frequency and acquisition time are accurately determined according to the inherent properties of the cable connector and the unique characteristics of the fluorescent material in the fiber optic probe, and the first temperature is determined according to the acquisition frequency and acquisition time. Secondly, in order to effectively eliminate interference factors, the environmental information of the cable connector 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 connector. Based on accurate temperature data, maintenance plans can be reasonably arranged, equipment replacement cycles can be optimized, and the overall service life of the cable connector and temperature measurement system can be extended. At the same time, frequent inspections and blind maintenance manpower and material resources can be saved, and the economic benefits of power operation and maintenance can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0011] Figure 1 A schematic diagram of a process for detecting temperature of a cable joint provided in an embodiment of the present disclosure; Figure 2 A structural block diagram of a cable joint temperature detection device provided by an embodiment of the present disclosure; Figure 3 A schematic block diagram of an electronic device provided by an embodiment of the present disclosure. DETAILED DESCRIPTION

[0012] In the following description, specific details such as specific system structures and technologies are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present disclosure. However, it should be clear to those skilled in the art that the present disclosure may 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 obstructing the description of the present disclosure with unnecessary details.

[0013] In order to make the purpose, technical solutions and advantages of the present disclosure more clear, specific embodiments will be described below in conjunction with the accompanying drawings.

[0014] Please refer to Figure 1 , Figure 1 A schematic diagram of a process for detecting cable joint temperature according to an embodiment of the present disclosure, the method comprising: S101: determining a target acquisition duration based on the properties of the cable connector and the characteristics of the fluorescent material, and determining a target acquisition frequency based on the properties of the cable connector 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.

[0015] In this embodiment, the properties of the cable joint include the material of the joint, the size of the joint, the electrical parameters, etc. The material of the joint can be metal (such as copper, aluminum), plastic or ceramic, etc. Different materials have different physical properties such as thermal conductivity, electrical conductivity, thermal expansion coefficient, etc. For example, metal materials have good thermal conductivity, and heat is quickly conducted in the joint; plastic materials have poor thermal conductivity, heat transfer is relatively slow, and they are easy to expand when heated; ceramic materials are resistant to high temperatures, have high hardness but are relatively brittle. These material properties 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.

[0016] The connector size specifications include the length, diameter, thickness and other dimensional parameters of the cable connector. Large-sized connectors will lead to uneven heat distribution, longer internal heat conduction paths, and correspondingly longer response times to temperature changes. Electrical parameters such as the operating voltage and current carrying capacity of the cable connector are also its properties. High-voltage and high-current cable connectors 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 connector, Joule heat will be generated due to the presence of contact resistance. The greater the current, the more heat will be generated and the faster the temperature will rise. In addition, this may be accompanied by electromagnetic interference, which will affect the normal operation of the optical fiber temperature measurement system.

[0017] Fluorescent material is the fluorescent substance in the optical fiber probe of the optical fiber temperature sensor. The optical fiber probe is the part of the optical fiber temperature sensor that is in direct contact or close contact with the object to be measured (cable joint), and contains fluorescent substances inside. This fluorescent substance will produce fluorescence when irradiated with excitation light of a suitable wavelength. The fluorescence properties of the fluorescent substance (such as fluorescence lifetime, emission spectrum, intensity, etc.) will change with temperature. The temperature of the cable joint can be measured by detecting the changes in these fluorescence properties.

[0018] The characteristics of fluorescent materials include fluorescence lifetime characteristics, fluorescence emission spectrum characteristics, fluorescence intensity characteristics, etc.

[0019] Fluorescence lifetime refers to the time required for the fluorescence intensity of a fluorescent substance to decay to 1 / e (about 36.8%) of the initial intensity after the excitation light stops. Different fluorescent materials have different fluorescence lifetimes, and the fluorescence lifetime will change with temperature.

[0020] Fluorescence emission spectrum refers to the wavelength distribution of light emitted by a fluorescent substance after being excited. Each fluorescent material has its own specific emission spectrum, including parameters such as emission peak position (peak wavelength) and half-height width (width at half the emission peak intensity).

[0021] Fluorescence intensity refers to the intensity of light emitted by fluorescent substances. It is affected by many factors, such as the intensity of the excitation light, the concentration of the fluorescent material, and temperature.

[0022] In this embodiment, the properties of the cable joint and the characteristics of the fluorescent material are factors that affect the optical fiber temperature sensor to measure the temperature of the cable joint. Based on the above two characteristics, the target acquisition time and target acquisition frequency can be determined to achieve accurate measurement of the cable joint temperature.

[0023] S102: Measuring the temperature of the cable joint based on the target acquisition duration and the target acquisition frequency to obtain a first temperature.

[0024] In this embodiment, the target acquisition duration refers to the length of time required for the optical fiber temperature sensor to obtain a fluorescent 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 optical fiber temperature sensor measures the temperature of the cable joint (i.e., collects fluorescent signals) per unit time. It is interrelated with the target acquisition duration and together determines the accuracy and real-time performance of the temperature measurement.

[0025] For example, if the cable connector is made of plastic with poor thermal conductivity, it may take a long time for the heat to transfer to the fiber optic probe. At the same time, the fluorescence lifetime of the fluorescent material is long and temperature changes affect its fluorescent signal slowly. In this case, the target acquisition time needs to be set longer to ensure that the fluorescent signal changes that can accurately reflect the connector temperature can be fully captured.

[0026] If the temperature of the cable connector changes very quickly and the fluorescent signal of the fluorescent material can respond quickly to the temperature change, a higher acquisition frequency is required to capture the rapid temperature change in time and avoid missing important temperature information. On the contrary, if the temperature changes slowly and the fluorescent signal responds slowly, the acquisition frequency can be appropriately reduced to reduce the amount of data and system resource usage.

[0027] In this embodiment, when the fluorescent material is irradiated by a laser of a specific wavelength, the electrons in the outer layer absorb energy and transition to a high energy level. After the laser disappears, the electrons return to the ground state and release energy, generating fluorescence. The fluorescence afterglow decay (i.e., fluorescence lifetime) is directly related to the temperature. By measuring the decay of the fluorescence afterglow, the first temperature of the cable connector can be calculated.

[0028] S103: Calibrate the first temperature based on the environment information of the cable connector to obtain a second temperature of the cable connector.

[0029] In this embodiment, the environmental information of the cable connector includes ambient temperature, ambient humidity, ambient light intensity, etc. These environmental factors may affect the fluorescent material in the optical fiber probe, thereby affecting the accuracy of temperature measurement. For example, the ambient temperature may change the fluorescent life of the fluorescent material, the ambient humidity may affect the luminous efficiency of the fluorescent material, and the ambient light intensity may interfere with the detection of the fluorescent signal.

[0030] In order to obtain a more accurate cable joint temperature, the first temperature needs to be calibrated according to the environmental information. This involves establishing a relationship model between environmental factors and temperature deviation. For example, through experiments or theoretical analysis, the quantitative relationship between the change in ambient temperature and the change in fluorescence lifetime, or the relationship between the ambient light intensity and the degree of interference with the fluorescence signal is determined. Then, the first temperature is corrected according to these relationships to obtain a calibrated temperature value, i.e., the second temperature.

[0031] It can be concluded from the above that this embodiment takes into account the actual situation of optical fiber temperature measurement. First, the acquisition frequency and acquisition time are accurately determined according to the inherent properties of the cable connector and the unique characteristics of the fluorescent material in the optical fiber probe, and the first temperature is determined according to the acquisition frequency and acquisition time. Secondly, in order to effectively eliminate interference factors, the environmental information of the cable connector 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 connector. Based on accurate temperature data, maintenance plans can be reasonably arranged, equipment replacement cycles can be optimized, and the overall service life of the cable connector and temperature measurement system can be extended. At the same time, frequent inspections and blind maintenance manpower and material resources can be saved, and the economic benefits of power operation and maintenance can be improved.

[0032] In one embodiment of the present disclosure, the properties of the cable connector include connector material; The target acquisition duration is determined based on the properties of the cable connector and the characteristics of the fluorescent material, and the target acquisition frequency is determined based on the properties of the cable connector and the characteristics of the fluorescent material, including: Determine a first acquisition time based on the characteristics of the fluorescent material, update the first acquisition time based on the material of the joint to obtain a first target acquisition time, and use the first target acquisition time as the target acquisition time; A first acquisition frequency is determined based on the characteristics of the fluorescent material, and the first acquisition frequency is updated based on the material of the joint to obtain a first target acquisition frequency; and the first target acquisition frequency is used as the target acquisition frequency.

[0033] In this embodiment, the properties of the cable connector include the connector material. The connector material includes metal, plastic and ceramic. The thermal conductivity of a metal cable connector is greater than that of a ceramic cable connector, and the thermal conductivity of a ceramic cable connector is greater than that of a plastic cable connector. Because there are a large number of free electrons inside the metal, these free electrons can move quickly between the lattices when heated, thereby effectively transferring heat, so the thermal conductivity of the metal is the highest. Plastic is an organic material composed of large molecular chains, and the molecular chains mainly interact with each other through weak van der Waals forces. This structure makes the heat transfer inside the plastic mainly rely on the vibration of the molecules, and there is no efficient heat transfer mechanism like the free electrons in the metal. Therefore, the thermal conductivity of the plastic cable connector is the lowest.

[0034] In this embodiment, the characteristic of the fluorescent material includes a sensitivity curve of the fluorescence lifetime to temperature.

[0035] Determining a first acquisition duration based on the characteristics of the fluorescent material includes: The preset time is corrected based on the sensitivity curve of the fluorescence lifetime changing with temperature to obtain a first acquisition time; Determining a first acquisition frequency based on a characteristic of the fluorescent material includes: The preset frequency is corrected based on the sensitivity curve of the fluorescence lifetime changing with temperature to obtain the first acquisition frequency.

[0036] Among them, the preset duration is the collection duration of the fluorescent material at room temperature (25°C). The sensitivity curve of fluorescence lifetime versus temperature is a curve that describes the relationship between the optical properties of fluorescent materials and temperature. It shows how the fluorescence lifetime of fluorescent materials changes under different temperature conditions and reflects the sensitivity of this change. Fluorescence lifetime refers to the time required for the fluorescence intensity of a fluorescent substance to decay to 1 / e (about 36.8%) of the initial intensity after the excitation stops after being irradiated by the excitation light.

[0037] For example, if the sensitivity of the fluorescent material changes slowly in the low temperature range and changes sharply in the high temperature range, the acquisition time in the high temperature zone can be shortened to 60%-80% of the preset time and the acquisition frequency can be increased to 1-2 times of the preset frequency to accurately track the rapid temperature fluctuations of the cable joint under high temperature.

[0038] The first acquisition duration is updated based on the joint material to obtain a first target acquisition duration, including: If the joint material is metal, the first collection duration is updated according to the first step duration to obtain the first target collection duration.

[0039] If the material of the joint is ceramic, the first acquisition time is updated according to the second step length to obtain the first target acquisition time.

[0040] If the joint material is plastic, the first acquisition time is updated according to the third step length to obtain the first target acquisition time length. The first step length is smaller than the second step length, and the second step length is smaller than the third step length.

[0041] The first acquisition frequency is updated based on the material of the joint to obtain the first target acquisition frequency, including: if the material of the joint is metal, the first acquisition frequency is updated according to the fourth step length to obtain the first target acquisition frequency.

[0042] If the material of the joint is ceramic, the first acquisition frequency is updated according to the fifth step length to obtain the first target acquisition frequency.

[0043] If the material of the connector is plastic, the first acquisition frequency is updated according to the sixth step to obtain the first target acquisition frequency.

[0044] The fourth step is longer than the fifth step, and the fifth step is longer than the sixth step.

[0045] In this embodiment, if the joint material is metal, the thermal conductivity is large, and the acquisition time does not need to be too long to measure the temperature value of the cable joint. Therefore, the first step length is smaller than the second step length. For example, if the first acquisition time length is 10 seconds, the first step length can be 2 seconds; if the first acquisition time length is 20 seconds, the second step length can be 5 seconds; if the first acquisition time length is 30 seconds, the third step length can be 30 seconds.

[0046] If the connector is made of metal, the temperature change is quickly transmitted to the fiber optic probe, and the temperature changes are frequent and rapid. In order to capture these rapid temperature changes in time, the fourth step is a relatively large frequency adjustment to increase the acquisition frequency. Such a higher acquisition frequency can better track the rapidly changing temperature of the metal connector, ensuring that no important temperature fluctuation information is missed.

[0047] It can be concluded from the above that this embodiment accurately determines the target acquisition duration and target acquisition frequency by comprehensively considering the characteristics of the connector material and the fluorescent material of the cable connector. This method can ensure that the collected data fully reflects the connector status and avoids unnecessary waste of resources. The collection parameters are adjusted individually according to the connector material, which improves the pertinence and efficiency of data collection and provides more reliable data support for the status monitoring and maintenance of the cable connector.

[0048] In one embodiment of the present disclosure, the properties of the cable connector include connector size specifications; The target acquisition duration is determined based on the properties of the cable connector and the characteristics of the fluorescent material, and the target acquisition frequency is determined based on the properties of the cable connector and the characteristics of the fluorescent material, including: Determine a first acquisition time based on the characteristics of the fluorescent material, update the first acquisition time based on the joint size specification to obtain a second target acquisition time, and use the second target acquisition time as the target acquisition time; A first acquisition frequency is determined based on the characteristics of the fluorescent material, and the first acquisition frequency is updated based on the joint size specification to obtain a second target acquisition frequency, and the second target acquisition frequency is used as the target acquisition frequency.

[0049] In this embodiment, the first acquisition duration is updated based on the joint size specification to obtain the second target acquisition duration, including: When the length of the cable connector is greater than the first length, or the diameter of the cable connector is greater than the first diameter, or the thickness of the cable connector is greater than the first thickness, the first acquisition duration plus the increased duration equals the second target acquisition duration. The first acquisition frequency multiplied by the adjustment coefficient obtains the second target acquisition frequency.

[0050] When the length of the cable connector is less than the first length, or the diameter of the cable connector is less than the first diameter, or the thickness of the cable connector is less than the first thickness, the first acquisition duration minus the increased duration equals the second target acquisition duration. The first acquisition frequency is divided by the adjustment coefficient to obtain the second target acquisition frequency.

[0051] For example, for large-sized joints, based on the time delay characteristics of heat conduction inside them and the lag in the temperature response of the fluorescent material, the original collection time of 5 seconds is increased by 2 seconds to obtain the second target collection time; the collection frequency is increased to twice the original to obtain the second target collection frequency, ensuring timely acquisition of comprehensive temperature information.

[0052] It can be concluded from the above that this embodiment combines the size specifications of the cable connector and the characteristics of the fluorescent material to scientifically set the target collection time and frequency, thereby ensuring that the data collection process is both efficient and accurate and can fully reflect the actual conditions of connectors of different sizes.

[0053] In one embodiment of the present disclosure, a cable joint temperature detection method is applied to a distributed cable joint detection system; The target acquisition duration is determined based on the properties of the cable connector and the characteristics of the fluorescent material, and the target acquisition frequency is determined based on the properties of the cable connector and the characteristics of the fluorescent material, including: Determine a second acquisition time based on the properties of the cable connector and the characteristics of the fluorescent material, and update the second acquisition time based on the heat conduction characteristics between adjacent cable connectors to obtain a target acquisition time; The second acquisition frequency is determined based on the properties of the cable connector and the characteristics of the fluorescent material, and the second acquisition frequency is updated based on the heat conduction characteristics between adjacent cable connectors to obtain a target acquisition frequency.

[0054] 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 at the same time.

[0055] Cable joints generate heat during operation, and adjacent cable joints will affect each other due to heat conduction. For example, when the temperature of a joint rises, the heat will be conducted to the adjacent joint through the cable itself or the surrounding medium, causing the temperature of the adjacent joint to change. This heat conduction interference makes the temperature of each joint no longer independent, but interrelated. If this 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, the temperature change of a joint may be misjudged due to heat conduction of adjacent joints, or the temperature fluctuation caused by heat conduction may not be captured in time.

[0056] Finite element simulation of heat conduction is a method of analyzing heat conduction phenomena through computer modeling. By dividing the cable joint and its surroundings into many small units (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 unit, the heat conduction process between joints and between joints and the surrounding environment can be simulated.

[0057] Using the results of thermal conduction finite element simulation, we can understand the specific conditions of heat conduction between adjacent joints, including the direction and intensity of heat flow and the changing pattern of temperature distribution. Based on these simulation results, the acquisition parameters (acquisition time and acquisition frequency) of the optical fiber sensor corresponding to each joint can be adjusted differently. For example, if the simulation results show that a certain joint is greatly affected by the thermal conduction of the adjacent joint, it is necessary to shorten the acquisition time to capture temperature changes more quickly, or increase the acquisition frequency to monitor temperature fluctuations more accurately.

[0058] From the above, it can be concluded that this embodiment can determine the initial acquisition parameters according to the joint properties and the characteristics of the fluorescent material, and then update the initial acquisition parameters in combination with the influence of the thermal conductivity characteristics of the adjacent joints to obtain the final acquisition parameters. This method avoids data deviation caused by unified settings and makes temperature measurement more accurate.

[0059] In one embodiment of the present disclosure, the environmental information includes environmental temperature, environmental humidity, and environmental light intensity; The first temperature is calibrated based on the environment information of the cable joint to obtain the second temperature of the cable joint, including: The first temperature is calibrated based on the ambient temperature, ambient humidity and ambient light intensity of the cable joint to obtain the second temperature of the cable joint.

[0060] In this embodiment, the environmental information of the cable connector includes three key information: ambient temperature, ambient humidity, and ambient light intensity. The ambient temperature is directly related to the heat exchange between the connector and the outside world, affecting the temperature state of the connector itself; the ambient humidity will affect the performance of the optical fiber probe and the fluorescent material. For example, humidity changes can change the fluorescence efficiency or cause water vapor interference on the probe surface; the ambient light intensity is easily mixed into the detection optical path, making the intensity of the fluorescent signal inaccurate.

[0061] Based on the above multi-dimensional environmental information, the first temperature is calibrated to obtain the second temperature. For ambient temperature, the measurement deviation caused by temperature difference is corrected according to the change law of the fluorescence lifetime and intensity with ambient temperature. In terms of ambient 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 ambient light intensity, spectral analysis, shading and background subtraction can be used to eliminate light interference and obtain the second temperature through comprehensive adjustment.

[0062] In this embodiment, the first temperature is calibrated according to the first formula to obtain the second temperature of the cable connector. The first formula is:

[0063] Wherein, T2 represents the second temperature, T1 represents the first temperature, k1 represents the correction coefficient related to the influence of ambient temperature in the i-th ambient temperature interval, which is dimensionless; k2 represents the correction coefficient related to the influence of ambient humidity in the j-th ambient temperature interval; k3 represents the correction coefficient related to the influence of ambient humidity in the l-th ambient temperature interval; n represents the number of different ambient temperature intervals, m represents the number of different ambient humidity intervals, and p represents the number of different ambient light intensity intervals, and n, m, and p are all positive integers; represents the rate at which the fluorescence lifetime changes with temperature, Indicates the measured value of the ambient temperature. It indicates the ambient temperature reference value set under ideal, standard and interference-free conditions. It represents the time weight factor of the impact of the duration of temperature change on the temperature deviation in the i-th ambient temperature interval; represents the rate at which the fluorescence lifetime changes with the ambient humidity, Indicates the actual measured current humidity value of the cable connector environment, dimensionless, Indicates the reference environmental humidity value used for calibration, which is the humidity reference value in a set standard interference-free environment. It represents the time weight factor of the effect of humidity change duration on temperature deviation in the jth ambient humidity interval; represents the rate at which the fluorescence intensity changes with the ambient light intensity, It indicates the actual measured intensity value of the current ambient light in the environment where the cable connector is located at the fluorescence emission wavelength. It indicates the intensity value of the reference ambient light used for calibration at the fluorescence emission wavelength. It is the light intensity reference value in a set standard interference-free environment. It represents the time weight factor of the effect of the duration of light intensity change on the temperature deviation in the lth ambient light intensity interval.

[0064] From the above, it can be concluded that this embodiment takes into account the ambient temperature, and can correct the problem of changes in fluorescence characteristics and inaccurate measurements caused by the difference in external temperature, so as to ensure that the measured temperature reflects the actual temperature of the cable connector. This embodiment takes into account the ambient humidity, and compensates for its influence on the fluorescence efficiency and heat conduction, so as to prevent humidity from interfering with temperature measurement. This embodiment also takes into account the influence of ambient light intensity, and eliminates the interference of light mixing with the measurement of fluorescence signals.

[0065] In one embodiment of the present disclosure, calibrating the first temperature based on the ambient temperature, ambient humidity, and ambient light intensity of the cable joint to obtain the second temperature of the cable joint includes: Construct temperature-fluorescent material fluorescence efficiency correction curve, humidity-fluorescent material fluorescence efficiency correction curve, ambient light intensity-fluorescent material fluorescence efficiency correction curve; A first calibration value is obtained based on a temperature-fluorescent material fluorescence efficiency correction curve and the ambient temperature of the cable connector; a second calibration value is obtained based on a humidity-fluorescent material fluorescence efficiency correction curve and the ambient humidity of the cable connector; a third calibration value is obtained based on an ambient light intensity-fluorescent material fluorescence efficiency correction curve and the ambient light intensity of the cable connector; The first temperature is calibrated based on a first weight corresponding to the first calibration quantity, a second weight corresponding to the second calibration quantity, and a third weight corresponding to the third calibration quantity to obtain a second temperature of the cable joint.

[0066] In this embodiment, temperature-fluorescent material fluorescence efficiency correction curve: This curve describes the relationship between 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 rises, 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. By measuring the fluorescence efficiency of the fluorescent material at different temperature points, and then fitting these data points to form a curve, the corresponding relationship between temperature and fluorescence efficiency can be obtained.

[0067] Humidity-fluorescence efficiency correction curve of fluorescent materials: Ambient humidity mainly affects the fluorescence efficiency by changing the medium environment around the fluorescent material. A high humidity environment will cause water molecules to adsorb on the surface of the fluorescent material, and these water molecules may interact with the fluorescent material and change its optical properties. By constructing a humidity-fluorescence efficiency correction curve, we can find the quantitative relationship between humidity changes and fluorescence efficiency changes. By conducting experiments under different humidity conditions and measuring the fluorescence efficiency, we can obtain a correlation curve between humidity and fluorescence efficiency, so that the fluorescence efficiency can be corrected according to the actual humidity conditions later.

[0068] Ambient light intensity-fluorescent material fluorescence efficiency correction curve: Ambient light intensity will interfere with the detection of fluorescent signals. When the ambient light intensity is within the emission wavelength range of the fluorescent material, the intensity of the detected fluorescent signal will change. By constructing this curve, the relationship between ambient light intensity and fluorescence efficiency can be clearly defined. Under different ambient light intensities, the true fluorescence efficiency of the fluorescent material is measured to obtain the ambient light intensity-fluorescence efficiency curve, which is used to correct the fluorescence efficiency deviation caused by ambient light.

[0069] In this embodiment, first, the ambient temperature, ambient humidity and ambient light intensity data of the cable joint are obtained by installing a temperature sensor, a humidity sensor and a light intensity sensor near the cable joint. According to the correction curve constructed above, when the real-time value of the ambient temperature is obtained, the corresponding fluorescence efficiency change can be found from the temperature-fluorescence efficiency correction curve. Similarly, for the real-time detection values ​​of the ambient humidity and the ambient light intensity, the fluorescence efficiency change caused by them can also be obtained from the corresponding correction curves. These changes 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 (first temperature), the first temperature can be calibrated by correcting the fluorescence signal attenuation deviation. For example, if the fluorescence signal is attenuated due to environmental factors, so that the first temperature calculated based on the fluorescence signal intensity is low, then by reversely compensating the attenuation deviation, a more accurate second temperature can be obtained, and this second temperature is closer to the actual temperature of the cable joint.

[0070] Exemplarily, the second temperature of the cable joint may be obtained by calibrating the first temperature based on a first weight corresponding to the first calibration quantity, a second weight corresponding to the second calibration quantity, and a third weight corresponding to the third calibration quantity.

[0071] For example, the first temperature is T1, the first calibration amount is Δa, the second calibration amount is Δb, the third calibration amount is Δc, the first weight is w1, the second weight is w2, and the third weight is w3, then the second temperature is: T2=T1+w1×Δa+ w2×Δb+ w3×Δc 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.

[0072] It can be concluded from the above that this embodiment can accurately quantify the impact of environmental factors on the fluorescence efficiency of fluorescent materials by constructing three correction curves.

[0073] Corresponding to the cable joint temperature detection method of the above embodiment, Figure 2 This is a structural block diagram of a cable joint temperature detection device provided by an embodiment of the present disclosure. For ease of description, only the parts related to the embodiment of the present disclosure are shown. 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.

[0074] The first calculation module 21 is used to determine the target acquisition duration based on the properties of the cable connector and the characteristics of the fluorescent material, and to determine the target acquisition frequency based on the properties of the cable connector 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; A second calculation module 22, configured to measure the temperature of the cable joint based on a target acquisition duration and a target acquisition frequency to obtain a first temperature; The calibration module 23 is used to calibrate the first temperature based on the environmental information of the cable connector to obtain the second temperature of the cable connector.

[0075] In one embodiment of the present disclosure, the properties of the cable connector include the connector material; the first calculation module 21 is specifically used for: Determine a first acquisition time based on the characteristics of the fluorescent material, update the first acquisition time based on the material of the joint to obtain a first target acquisition time, and use the first target acquisition time as the target acquisition time; A first acquisition frequency is determined based on the characteristics of the fluorescent material, and the first acquisition frequency is updated based on the material of the joint to obtain a first target acquisition frequency; and the first target acquisition frequency is used as the target acquisition frequency.

[0076] In one embodiment of the present disclosure, the properties of the cable connector include connector size specifications; the first calculation module 21 is specifically used to: Determine a first acquisition time based on the characteristics of the fluorescent material, update the first acquisition time based on the joint size specification to obtain a second target acquisition time, and use the second target acquisition time as the target acquisition time; A first acquisition frequency is determined based on the characteristics of the fluorescent material, and the first acquisition frequency is updated based on the joint size specification to obtain a second target acquisition frequency, and the second target acquisition frequency is used as the target acquisition frequency.

[0077] In one embodiment of the present disclosure, the characteristics of the fluorescent material include a sensitivity curve of the fluorescence lifetime as a function of temperature; The first calculation module 21 is specifically used for: The preset time is corrected based on the sensitivity curve of the fluorescence lifetime changing with temperature to obtain a first acquisition time; The preset frequency is corrected based on the sensitivity curve of the fluorescence lifetime changing with temperature to obtain the first acquisition frequency.

[0078] In one 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 used for: Determine a second acquisition time based on the properties of the cable connector and the characteristics of the fluorescent material, and update the second acquisition time based on the heat conduction characteristics between adjacent cable connectors to obtain a target acquisition time; The second acquisition frequency is determined based on the properties of the cable connector and the characteristics of the fluorescent material, and the second acquisition frequency is updated based on the heat conduction characteristics between adjacent cable connectors to obtain a target acquisition frequency.

[0079] In one embodiment of the present disclosure, the environmental information includes environmental temperature, environmental humidity, and environmental light intensity; The calibration module 23 is specifically used for: The first temperature is calibrated based on the ambient temperature, ambient humidity and ambient light intensity of the cable joint to obtain the second temperature of the cable joint.

[0080] In one embodiment of the present disclosure, the calibration module 23 is specifically used for: Construct temperature-fluorescent material fluorescence efficiency correction curve, humidity-fluorescent material fluorescence efficiency correction curve, ambient light intensity-fluorescent material fluorescence efficiency correction curve; A first calibration value is obtained based on a temperature-fluorescent material fluorescence efficiency correction curve and the ambient temperature of the cable connector; a second calibration value is obtained based on a humidity-fluorescent material fluorescence efficiency correction curve and the ambient humidity of the cable connector; a third calibration value is obtained based on an ambient light intensity-fluorescent material fluorescence efficiency correction curve and the ambient light intensity of the cable connector; The first temperature is calibrated based on a first weight corresponding to the first calibration quantity, a second weight corresponding to the second calibration quantity, and a third weight corresponding to the third calibration quantity to obtain a second temperature of the cable joint.

[0081] See also Figure 3 , Figure 3 A schematic block diagram of an electronic device provided by an embodiment of the present disclosure. Figure 3 The electronic device 300 in the embodiment shown 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 processors 301, input devices 302, output devices 303 and memories 304 communicate with each other via a communication bus 305. The memory 304 is used to store computer programs, which include program instructions. The processor 301 is used to execute the program instructions stored in the memory 304. 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 modules 21 to 23 are shown.

[0082] It should be understood that in the embodiment of the present disclosure, the processor 301 may be a central processing unit (CPU), and the processor may also be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0083] The input device 302 may include a touch panel, a fingerprint collection sensor (for collecting the user's fingerprint information and fingerprint direction information), a microphone, etc., and the output device 303 may include a display (LCD, etc.), a speaker, etc.

[0084] The memory 304 may include a read-only memory and a random access memory, and provide instructions and data to the processor 301. A portion 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.

[0085] In a specific implementation, the processor 301, input device 302, and output device 303 described in the embodiments of the present disclosure can execute the implementation methods described in the first and second embodiments of the cable connector temperature detection method provided in the embodiments of the present disclosure, and can also execute the implementation methods of the electronic device described in the embodiments of the present disclosure, which will not be repeated here.

[0086] In another embodiment of the present disclosure, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores a computer program, wherein the computer program includes program instructions, and when the program instructions are executed by the processor, all or part of the processes in the above-mentioned embodiment method are implemented, and the computer program can also be completed by instructing the relevant hardware through the computer program. The computer program can be stored in a computer-readable storage medium, and when the computer program is executed by the processor, the steps of each of the above-mentioned method embodiments can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form, etc. The computer-readable medium can include: any entity or device capable of carrying computer program code, recording medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium, etc.

[0087] The computer-readable storage medium may be an internal storage unit of the electronic device of any of the aforementioned embodiments, such as a 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, a smart memory card (Smart Media Card, SMC), a secure digital (SecureDigital, SD) card, a flash card (Flash Card), etc. equipped on the electronic device. Furthermore, the computer-readable storage medium may also include both an internal storage unit of the electronic device and an external storage device. The computer-readable storage medium is used to store computer programs and other programs and data required by the electronic device. The computer-readable storage medium may also be used to temporarily store data that has been output or is to be output.

[0088] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this disclosure.

[0089] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the electronic devices and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here.

[0090] In the several embodiments provided in the present 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 only schematic, for example, the division of units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces or units, or it can be an electrical, mechanical or other form of connection.

[0091] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the embodiments of the present disclosure.

[0092] In addition, each functional unit in each embodiment of the present disclosure may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0093] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present disclosure, and these modifications or replacements should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A cable joint temperature detection method, characterized in that: include: The target acquisition duration is determined based on the properties of the cable connector and the characteristics of the fluorescent material, and the target acquisition frequency is determined based on the properties of the cable connector 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; Measuring the temperature of the cable joint based on the target acquisition duration and the target acquisition frequency to obtain a first temperature; The first temperature is calibrated based on the environmental information of the cable connector to obtain the second temperature of the cable connector.

2. The cable joint temperature detection method according to claim 1, characterized in that: The properties of the cable connector include connector material; The step of determining the target acquisition duration based on the properties of the cable connector and the characteristics of the fluorescent material, and determining the target acquisition frequency based on the properties of the cable connector 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 material of the connector to obtain a first target acquisition duration, and use the first target acquisition duration as the target acquisition duration; A first acquisition frequency is determined based on the characteristics of the fluorescent material, and the first acquisition frequency is updated based on the material of the connector to obtain a first target acquisition frequency; and the first target acquisition frequency is used as the target acquisition frequency.

3. The cable joint temperature detection method according to claim 1, characterized in that: The properties of the cable connector include connector size specifications; The step of determining the target acquisition duration based on the properties of the cable connector and the characteristics of the fluorescent material, and determining the target acquisition frequency based on the properties of the cable connector and the characteristics of the fluorescent material, includes: Determine a first acquisition time based on the characteristics of the fluorescent material, update the first acquisition time based on the joint size specification to obtain a second target acquisition time, and use the second target acquisition time as the target acquisition time; A first acquisition frequency is determined based on the characteristics of the fluorescent material, the first acquisition frequency is updated based on the joint size specification to obtain a second target acquisition frequency, and the second target acquisition frequency is used 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 fluorescence lifetime versus temperature; The determining the first acquisition duration based on the characteristics of the fluorescent material includes: Based on the sensitivity curve of the fluorescence lifetime changing with temperature, the preset duration is corrected to obtain a first acquisition duration; The determining of the first acquisition frequency based on the characteristics of the fluorescent material comprises: The preset frequency is corrected based on the sensitivity curve of the fluorescence lifetime changing with temperature to obtain the 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 step of determining the target acquisition duration based on the properties of the cable connector and the characteristics of the fluorescent material, and determining the target acquisition frequency based on the properties of the cable connector and the characteristics of the fluorescent material, includes: Determine the second acquisition time based on the properties of the cable connector and the characteristics of the fluorescent material, and update the second acquisition time based on the heat conduction characteristics between adjacent cable connectors to obtain the target acquisition time; The second acquisition frequency is determined based on the properties of the cable connector and the characteristics of the fluorescent material, and the second acquisition frequency is updated based on the heat conduction characteristics between adjacent cable connectors to obtain a target acquisition frequency.

6. The cable joint temperature detection method according to claim 1, characterized in that: The environmental information includes ambient temperature, ambient humidity and ambient light intensity; The step of calibrating the first temperature based on the environmental information of the cable connector to obtain the second temperature of the cable connector includes: The first temperature is calibrated based on the ambient temperature, ambient humidity and ambient light intensity of the cable connector to obtain the second temperature of the cable connector.

7. The cable joint temperature detection method according to claim 6, characterized in that: The step of calibrating the first temperature based on the ambient temperature, ambient humidity and ambient light intensity of the cable connector to obtain the second temperature of the cable connector includes: Construct temperature-fluorescent material fluorescence efficiency correction curve, humidity-fluorescent material fluorescence efficiency correction curve, ambient light intensity-fluorescent material fluorescence efficiency correction curve; A first calibration value is obtained based on the temperature-fluorescent material fluorescence efficiency correction curve and the ambient temperature of the cable connector; a second calibration value is obtained based on the humidity-fluorescent material fluorescence efficiency correction curve and the ambient humidity of the cable connector; a third calibration value is obtained based on the ambient light intensity-fluorescent material fluorescence efficiency correction curve and the ambient light intensity of the cable connector; Based on a first weight corresponding to the first calibration quantity, a second weight corresponding to the second calibration quantity, and a third weight corresponding to the third calibration quantity, the first temperature is calibrated to obtain a second temperature of the cable connector.

8. A cable joint temperature detection device, characterized in that: include: A first calculation module is used to determine the target acquisition duration based on the properties of the cable connector and the characteristics of the fluorescent material, and to determine the target acquisition frequency based on the properties of the cable connector 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; A second calculation module, 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; A calibration module is used to calibrate the first temperature based on the environmental information of the cable connector to obtain a second temperature of the cable connector.

9. 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 7 are implemented.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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