An intelligent temperature control system based on optical fiber temperature sensor

Abstract

The present invention relates to the field of optical fiber temperature measurement technology, and in particular to an intelligent temperature control system based on an optical fiber temperature sensor. The optical fiber temperature sensor is used to obtain the connection temperature of the connecting component between the gas cabinet and the cable head and transmit an output signal; the demodulation module is used to determine the connection temperature of the connecting component; the correction module is used to correct the measured temperature of the optical fiber temperature sensor when the optical fiber temperature sensor is in a phase change state to secondary determine the connection temperature of the connecting component; the control module is used to adjust the operating state of the gas cabinet according to the connection temperature of the connecting component. The system of the present invention can monitor the connection temperature of the connecting component in real time and accurately, and is provided with a control module to make corresponding control adjustments for different temperature conditions to ensure the safe and stable operation of the gas cabinet. The temperature measuring probe of the optical fiber temperature sensor of the present invention is coated with a phase change material layer to prevent it from being damaged due to being in a high temperature environment for a long time, effectively improving the stability of the temperature control system.

Description

Technical Field

[0001] The present invention relates to the technical field of optical fiber temperature measurement, and in particular to an intelligent temperature control system based on an optical fiber temperature measurement sensor. Background Art

[0002] As an essential component of the power system, the key components within the gas cabinet (including contacts, busbars, and cable connectors) are susceptible to heat accumulation during prolonged high-current operation. Poor heat dissipation or high contact resistance will cause temperatures to rise, potentially leading to overheating failures. Overheating not only shortens equipment life but also accelerates the aging of insulation materials. In severe cases, it can cause serious safety hazards such as short circuits and fires. Therefore, real-time monitoring of the internal temperature of the gas cabinet is crucial to promptly detect and resolve overheating issues, effectively prevent accidents, and ensure the stable and safe operation of the power system.

[0003] Therefore, how to accurately obtain the internal temperature of the gas cabinet through an optical fiber temperature sensor is of paramount importance to ensure the normal operation of the gas cabinet. For example, the prior art discloses an optical fiber temperature sensor for use in a gas cabinet, comprising an outer protective shell, a connector fixedly connected to the left surface of the outer protective shell, a first groove provided on the side surface of the outer protective shell, a fixing ring fixedly connected to the outer surface of the connector, a threaded structure fixedly connected to the left end of the connector, a sleeve threadedly connected to the outer surface of the threaded structure, and an optical fiber body fixedly connected to the inside of the sleeve. The optical fiber temperature sensor for use in a gas cabinet is composed of an optical fiber temperature sensor, a metal conduit, and an ST coupler through a built-in optical fiber. The built-in optical fiber temperature sensor is an integrated structure consisting of a sensing part and an optical fiber at one end and an ST coupler at the other end. It can be directly cast in a cable socket, which can increase the withstand voltage value and avoid electromagnetic interference, and the length of the internal optical fiber can be customized.

[0004] However, in the above-mentioned technical solution of the fiber optic temperature sensor applied to the gas cabinet, when the fiber optic temperature sensor is continuously in a high-temperature environment, especially when the temperature inside the gas cabinet frequently exceeds the maximum temperature limit that the fiber optic temperature sensor can tolerate, such extreme conditions will cause irreversible damage to the fiber optic temperature sensor, thereby causing deviations in the gas cabinet connection temperature information obtained by it. Furthermore, the distortion of the temperature data may further cause problems in subsequent control links, and the control system may make wrong judgments, resulting in the inability to effectively adjust and control the operating status of the gas cabinet, thereby reducing the reliability of the temperature control system. Summary of the Invention

[0005] The purpose of the present invention is to provide an intelligent temperature control system based on an optical fiber temperature sensor to solve the problem in the related art that when the optical fiber temperature sensor is continuously in a high-temperature environment, especially when the temperature inside the inflatable cabinet frequently exceeds the maximum temperature limit that the optical fiber temperature sensor can tolerate, such extreme conditions will cause irreversible damage to the optical fiber temperature sensor, thereby causing deviations in the inflatable cabinet connection temperature information obtained by it. Furthermore, the distortion of temperature data may further cause problems in subsequent control links, and the control system may make wrong judgments, resulting in the inability to effectively adjust and control the operating status of the inflatable cabinet, thereby reducing the reliability of the temperature control system.

[0006] To this end, the present invention provides an intelligent temperature control system based on an optical fiber temperature sensor, comprising:

[0007] An optical fiber temperature sensor is used to obtain the connection temperature of the connection component between the inflatable cabinet and the cable head in the form of an optical signal and transmit an output signal;

[0008] The operating state of the optical fiber temperature sensor includes a stable state and a phase change state;

[0009] a demodulation module connected to the plurality of optical fiber temperature sensors, configured to receive the plurality of output signals and demodulate the signals to determine the connection temperature;

[0010] a correction module connected to the optical fiber temperature sensor, for correcting the measured temperature of the optical fiber temperature sensor to re-determine the connection temperature when the optical fiber temperature sensor is in the phase change state;

[0011] A control module is connected to the demodulation module, the correction module and the inflatable cabinet, and is used to adjust the operating state of the inflatable cabinet according to the connection temperature.

[0012] The optical fiber temperature sensor includes a temperature measuring part and an integration part;

[0013] The temperature measuring unit includes a temperature measuring probe, a transmission optical fiber and a transmission interface;

[0014] The temperature measuring unit is used to obtain the internal temperature of the inflatable cabinet and transmit the internal temperature to the transmission interface via the transmission optical fiber using the optical signal;

[0015] The integrated part is connected to the temperature measuring part and includes an ST coupler and a signal receiving interface;

[0016] The transmission interface is connected to the receiving interface via a thread;

[0017] The integration unit is used to receive a plurality of the optical signals in the transmission optical fiber and combine them to form a single output signal.

[0018] One end of the temperature measuring part is the temperature measuring probe, and the other end is the transmission interface, specifically:

[0019] The temperature measuring probe is integrally connected to the transmission optical fiber, and the transmission optical fiber is integrally connected to the transmission interface to form the temperature measuring portion;

[0020] Wherein, the transmission optical fiber is a multimode optical fiber;

[0021] Wherein, a raised conductive socket is provided at the inner center of the transmission interface.

[0022] The integrated part combines the circuits to form a single output signal:

[0023] The ST coupler adopts cumulative average filtering, that is, a plurality of optical signals are accumulated and averaged to form a single output signal.

[0024] The operating state of the optical fiber temperature sensor includes the stable state and the phase change state, specifically:

[0025] If the connection temperature is greater than or equal to the phase transition temperature, the operating state of the optical fiber temperature sensor corresponds to the phase transition state;

[0026] If the connection temperature is lower than the phase transition temperature, the operating state of the optical fiber temperature sensor corresponds to the stable state.

[0027] The temperature measuring probe is also coated with a phase change material layer, specifically:

[0028] When the connection temperature is greater than the phase change temperature, the phase change material in the phase change material layer absorbs heat and melts from a solid state to a liquid state, so that the temperature of the temperature measuring probe is not greater than a threshold temperature;

[0029] Wherein, the threshold temperature is greater than or equal to the phase transition temperature.

[0030] When the connection temperature decreases from greater than the threshold temperature to less than the threshold temperature, the phase change material in the phase change material layer gradually cools and solidifies from a liquid state to a solid state.

[0031] The physical state of the phase change material in the phase change material layer is determined only by the connection temperature, and the phase change material can be transformed from liquid to solid and from solid to liquid any number of times.

[0032] When the optical fiber temperature sensor is in the phase change state, the correction module corrects the measured temperature to re-determine the connection temperature, specifically:

[0033] The correction module determines the connection temperature secondarily according to the phase change latent heat, phase change coefficient and specific heat capacity of the phase change material layer:

[0034] (1),

[0035] Wherein, T' is the connection temperature determined by the correction module twice, Tmeasured is the measured temperature of the optical fiber temperature sensor, k is the phase change coefficient, ΔH is the phase change latent heat, c 介 is the specific heat capacity of the medium.

[0036] The control module compares the connection temperature with a corresponding standard value, specifically:

[0037] If the connection temperature is greater than or equal to a first safety temperature, the control module adjusts the output power of the inflatable cabinet to reduce the connection temperature of the inflatable cabinet;

[0038] If the connection temperature is greater than or equal to a second safety temperature, the control module shuts down the inflatable cabinet to reduce the connection temperature of the inflatable cabinet;

[0039] Wherein, the second safety temperature is greater than the first safety temperature.

[0040] The beneficial effects of the present invention are:

[0041] The present invention provides an intelligent temperature control system based on an optical fiber temperature sensor. By integrating a high-precision temperature measurement system, the system can accurately monitor the connection temperature of the gas cabinet in real time. The system also includes a control module that, while accurately acquiring the connection temperature of the gas cabinet, can promptly and effectively make corresponding control adjustments for different temperature conditions to ensure the safe and stable operation of the gas cabinet. Furthermore, the temperature probe of the optical fiber temperature sensor of the present invention is coated with a layer of phase change material, further protecting the probe from damage due to long-term exposure to high temperatures, ensuring the accuracy and reliability of the entire temperature control system and effectively improving the stability of the temperature control system.

[0042] Furthermore, when the internal temperature of the phase-change material layer exceeds a threshold, it absorbs heat and melts, thereby lowering the temperature of the temperature probe and preventing damage from high temperatures. When the temperature drops below the threshold, the phase-change material solidifies again, continuing to protect the temperature probe. This mechanism enables the device to operate stably and for extended periods in high-temperature environments, improving its high-temperature resistance and further enhancing the stability of the temperature control system.

[0043] Furthermore, by protecting the temperature probe from damage caused by high temperatures, the phase change material layer helps extend the service life of the entire temperature measurement device, reducing replacement and maintenance costs and improving the cost-effectiveness and practicality of the temperature control system.

[0044] Furthermore, a correction module is provided to correct the temperature measured by the optical fiber temperature sensor during its phase change state, thereby re-determining the connection temperature of the inflatable cabinet. This effectively solves the problem of temperature measurement deviation caused by temperature changes of the sensor itself and improves the accuracy of temperature measurement.

[0045] Furthermore, the integrated part of the present invention adopts ST coupler and cumulative average filtering technology to combine multiple optical signals and form a single output signal, thereby improving the stability of signal transmission and processing efficiency.

[0046] Furthermore, the transmission interface and the receiving interface are connected by a threaded connection, making installation and removal easier. This connection method also provides good sealing performance, preventing external factors such as dust and moisture from affecting the device, further improving the stability of the temperature control system. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 This is a structural block diagram of an intelligent temperature control system based on an optical fiber temperature sensor in an embodiment of the present invention;

[0048] Figure 2 : is a structural block diagram of an optical fiber temperature sensor in an embodiment of the present invention;

[0049] Figure 3 Schematic diagram of the structure of an optical fiber temperature detector in an embodiment of the present invention;

[0050] Figure 4 This is a schematic diagram of a partially enlarged structure of a temperature measuring probe in an embodiment of the present invention;

[0051] Figure 5 is a decision block diagram of a control module in an embodiment of the present invention;

[0052] Among them, there are 1 temperature measuring probe, 2 transmission optical fiber, 3 transmission interface, 4 receiving interface, 5ST coupler, and 6 phase change material layer. DETAILED DESCRIPTION

[0053] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0054] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0055] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0056] In order to better understand the present invention, the terms in the present invention are explained below:

[0057] Combining: Combining two or more fiber optic signals into a single fiber optic signal.

[0058] Integrated connection: a fixed connection that cannot be removed or separated.

[0059] Demodulation: The process of converting an optical signal transmitted through an optical fiber into an electric current signal using the photoelectric effect through a photodetector, and then restoring it to the original electrical signal through a decoder after amplification, filtering and further processing.

[0060] Multimode fiber: Multimode fiber (MMF) is an optical fiber that can support multiple transverse waveguide modes under given optical frequency and polarization conditions.

[0061] See also Figure 1 As shown, the intelligent temperature control system based on the optical fiber temperature sensor provided by the present invention includes:

[0062] Optical fiber temperature sensor, used to obtain the connection temperature of the connection component between the inflatable cabinet and the cable head in the form of an optical signal and transmit the output signal;

[0063] Among them, the operating state of the optical fiber temperature sensor includes a stable state and a phase change state;

[0064] a demodulation module connected to the plurality of optical fiber temperature sensors, configured to receive the plurality of output signals and demodulate the signals to determine the connection temperature;

[0065] a correction module connected to the optical fiber temperature sensor, for correcting the measured temperature of the optical fiber temperature sensor to secondarily determine the connection temperature when the optical fiber temperature sensor is in a phase change state;

[0066] The control module is connected to the demodulation module, the correction module and the inflatable cabinet, and is used to adjust the operating state of the inflatable cabinet according to the connection temperature.

[0067] In practice, the connection temperature of the above-mentioned gas cabinet specifically monitors the temperature changes of the connection part between the cable head and the gas cabinet, rather than just focusing on the overall connection temperature of the gas cabinet. This monitoring process uses professional equipment such as infrared thermal imagers and temperature sensors to capture the tiny temperature changes of the connection part during operation in real time and generate detailed temperature data reports to promptly detect local overheating risks caused by factors such as poor contact, material aging, or excessive load. By comprehensively analyzing and evaluating the monitored temperature data, potential safety hazards can be quickly identified and corresponding measures can be taken, such as adjusting the load, optimizing heat dissipation, or replacing connection components, thereby effectively preventing serious faults such as fire and short circuits and ensuring the reliability and safety of power transmission.

[0068] In the above steps, this embodiment provides an intelligent temperature control system based on an optical fiber temperature sensor. This system, by integrating a high-precision temperature measurement system, can accurately monitor the connection temperature of the gas cabinet in real time. At the same time, the system is provided with a control module, which can accurately obtain the connection temperature of the gas cabinet and make corresponding control adjustments in a timely and effective manner for different temperature conditions to ensure the safe and stable operation of the gas cabinet. In addition, the temperature probe of the optical fiber temperature sensor of the present invention is coated with a phase change material layer, which further protects the temperature probe from damage due to long-term exposure to high temperature environments, ensuring the accuracy and reliability of the entire temperature control system, thereby effectively improving the stability of the temperature control system.

[0069] Furthermore, when the internal temperature of the phase-change material layer exceeds a threshold, it absorbs heat and melts, thereby lowering the temperature of the temperature probe and preventing damage from high temperatures. When the temperature drops below the threshold, the phase-change material solidifies again, continuing to protect the temperature probe. This mechanism enables the device to operate stably and for extended periods in high-temperature environments, improving its high-temperature resistance and further enhancing the stability of the temperature control system.

[0070] Furthermore, by protecting the temperature probe from damage caused by high temperatures, the phase change material layer helps extend the service life of the entire temperature measurement device, reducing replacement and maintenance costs and improving the cost-effectiveness and practicality of the temperature control system.

[0071] Furthermore, a correction module is provided to correct the temperature measured by the optical fiber temperature sensor during its phase change state, thereby re-determining the connection temperature of the inflatable cabinet. This effectively solves the problem of temperature measurement deviation caused by temperature changes of the sensor itself and improves the accuracy of temperature measurement.

[0072] See also Figure 2 and Figure 3 As shown, the optical fiber temperature sensor includes a temperature measuring part and an integration part;

[0073] The temperature measurement unit includes a temperature measurement probe 1, a transmission optical fiber 2 and a transmission interface 3;

[0074] The temperature measuring unit is used to obtain the internal temperature of the inflatable cabinet and transmit the internal temperature to the transmission interface via the transmission optical fiber 2 as an optical signal;

[0075] The integration part is connected to the temperature measurement part, and includes an ST coupler 5 and a signal receiving interface 4;

[0076] The transmission interface 3 and the receiving interface 4 are connected by threads;

[0077] The integrated part is used to receive a plurality of optical signals in the transmission optical fiber 2 and combine them to form a single output signal.

[0078] In a specific embodiment, the transmission optical fiber 2 has a length of 3 m to 50 m, a bending radius of not less than 4.4 cm, and a diameter of 2 mm.

[0079] It is understandable that the length of the transmission optical fiber 2 can be set accordingly according to the size of the actual application site.

[0080] Specifically, the temperature probe 1 contains a fluorescent material doped with rare earth ions. Upon being excited by light of a specific wavelength, it transitions from the ground state to an excited state, then returns to the ground state via radiative transition, emitting characteristic fluorescence. As temperature rises, the population distribution of the rare earth ions in the ground and excited states shifts, causing changes in parameters such as fluorescence spectral intensity, peak position, and lifetime. By establishing a calibration relationship between fluorescence parameters and temperature, accurate temperature measurement can be achieved.

[0081] Furthermore, the above-mentioned ST coupler 5 is widely used in local area networks, wide area networks, optical fiber communication systems and data centers, is suitable for multi-mode optical fiber and single-mode optical fiber connection, and supports high-speed data transmission.

[0082] The integrated part of the present invention adopts ST coupler and cumulative average filtering technology to combine multiple optical signals and form a single output signal, thereby improving the stability of signal transmission and processing efficiency.

[0083] Furthermore, the transmission interface 3 and the receiving interface 4 are connected by a threaded engagement, making the installation and removal process more convenient. This connection method also provides good sealing performance, preventing external factors such as dust and moisture from affecting the device, and further improving the stability of the temperature control system.

[0084] As the preferred technical solution for the intelligent temperature control system based on optical fiber temperature sensors, copper is selected to form the transmission interface, receiving interface and raised conduction socket, mainly due to copper's excellent conductivity, corrosion resistance, thermal stability, high strength and wear resistance. These characteristics ensure low signal loss and stability during transmission, and improve the accuracy and reliability of the temperature measuring device. At the same time, copper is easy to process and connect, and is convenient for customization and installation according to actual needs, thereby ensuring the efficient, stable and reliable operation of the temperature measuring device in the complex environment inside the inflatable cabinet.

[0085] In a specific implementation, a groove with the same depth is symmetrically provided on the ST coupler 5 .

[0086] The groove design allows for more precise positioning of the ST coupler when connecting to other devices or fiber optic connectors, ensuring that the coupler is accurately aligned and inserted into the corresponding slot or interface, thus avoiding signal transmission problems caused by misalignment.

[0087] As the preferred technical solution for the intelligent temperature control system based on optical fiber temperature sensors, two casting points are symmetrically arranged at the same horizontal height on the outer surface of the ST coupler; the two casting points are symmetrically arranged, and any casting point is equidistant from the groove horizontally.

[0088] In a specific embodiment, the present invention's intelligent temperature control system, based on optical fiber temperature sensors, is embedded within the product during the casting of the plug, completely interlocking with the plug without changing the original form of the plug and cable connector, nor degrading the performance of the cable connector or the entire cabinet. The plug and the entire cabinet, equipped with the intelligent temperature control system based on optical fiber temperature sensors, can successfully pass partial discharge and withstand voltage tests. Preferably, the tensile strength at the casting point should be 40 to 100 Newtons.

[0089] Please continue reading Figure 3 As shown, one end of the temperature measuring part is a temperature measuring probe 1, and the other end is a transmission interface 3, specifically:

[0090] The temperature measuring probe 1 and the transmission optical fiber 2 are integratedly connected, and the transmission optical fiber 2 and the transmission interface 3 are integratedly connected to form a temperature measuring part;

[0091] Wherein, the transmission optical fiber 2 is a multimode optical fiber;

[0092] Among them, a raised conductive socket is set at the center of the inner side of the transmission interface.

[0093] In a specific embodiment, the transmission optical fiber 2 adopts a multimode optical fiber with a larger core diameter to allow optical signals to be incident at multiple angles and simultaneously transmit optical signals in multiple propagation modes (i.e., multiple different paths or phases), thereby realizing the transmission of optical signals.

[0094] In a specific implementation, a protective layer is further provided, which is coated on the outer surface of the transmission optical fiber 2. The protective layer material is polytetrafluoroethylene and has a thickness of 2 mm. The exemplary optical fiber protective cover is made of polytetrafluoroethylene material, which can be used for a long time at -180 to 260°C. This material has the characteristics of acid and alkali resistance, resistance to various organic solvents, and high temperature resistance. The optical fiber protective cover is made of 2 mm polytetrafluoroethylene material, which is more suitable for cable joint casting.

[0095] The integrated circuit combines the circuits to form a single output signal:

[0096] The ST coupler 5 uses cumulative averaging filtering to accumulate and average a plurality of optical signals to form a single output signal.

[0097] In practice, ST coupler 5 employs a cumulative average filtering algorithm that continuously samples the combined optical signal, accumulates the signal intensities at multiple sampling points, and calculates the average. This process effectively reduces random fluctuations and noise interference in the optical signal, thereby improving signal stability and signal-to-noise ratio. This optimized single optical signal is stably output, providing a high-quality information transmission foundation for subsequent temperature control.

[0098] The operating states of the optical fiber temperature sensor include stable state and phase change state, specifically:

[0099] If the connection temperature is greater than or equal to the phase change temperature, the operating state of the optical fiber temperature sensor corresponds to the phase change state;

[0100] If the connection temperature is lower than the phase transition temperature, the operation state of the optical fiber temperature sensor corresponds to a stable state.

[0101] See also Figure 4 As shown, the temperature probe is also coated with a phase change material layer, specifically:

[0102] When the connection temperature is higher than the phase change temperature, the phase change material in the phase change material layer absorbs heat and melts from solid to liquid, so that the temperature of the temperature measuring probe is not higher than the threshold temperature;

[0103] The threshold temperature is greater than or equal to the phase transition temperature.

[0104] When the connection temperature decreases from a temperature greater than a threshold temperature to a temperature less than a threshold temperature, the phase change material in the phase change material layer gradually cools and solidifies from a liquid state to a solid state.

[0105] The physical state of the phase change material in the phase change material layer is determined only by the connection temperature, and the phase change material can be transformed from liquid to solid and from solid to liquid any number of times.

[0106] It is understandable that the above phase change temperature is related to the phase change material selected in the phase change material layer. For example, the temperature measuring probe has a temperature measuring range of -40°C to 260°C, corresponding to the phase change material with a phase change temperature of 300°C.

[0107] It can be understood that when the above-mentioned optical fiber temperature sensor is in a stable state, the phase change material in the phase change material layer does not undergo phase change; when in a phase change state, the phase change material in the phase change material layer undergoes a phase change, that is, changes from a solid molten state to a liquid state.

[0108] In detail, phase change materials can absorb or release a large amount of heat at a specific temperature, releasing the stored energy through the phase change process to maintain temperature stability or transfer thermal energy.

[0109] In practice, the phase change material in the phase change material layer 6 can be a metal alloy, such as a ferrite-austenite phase change material. When heated to approximately 300°C, the phase change material transforms from ferrite to austenite, or vice versa upon cooling. Alternatively, the phase change material can be a molten salt, such as sodium nitrate (NaNO3). The melting point of sodium nitrate is approximately 307°C, at which point it transforms from a solid to a liquid state, absorbing a significant amount of heat.

[0110] When the optical fiber temperature sensor is in a phase change state, the correction module corrects the measured temperature to determine the connection temperature again, specifically:

[0111] The correction module determines the connection temperature secondary based on the phase change latent heat of the phase change material layer, the phase change coefficient, and the specific heat capacity of the medium:

[0112] ,

[0113] Where T' is the connection temperature determined by the correction module twice, Tmeasured is the measured temperature of the optical fiber temperature sensor, k is the phase change coefficient, ΔH is the phase change latent heat, c 介 is the specific heat capacity of the medium.

[0114] It is understood that the phase change coefficient k is related to the thickness of the phase change material layer and the proportion of material that has undergone phase change in the phase change material layer. The thickness of the phase change material layer is negatively correlated with the phase change coefficient k, while the proportion of material that has undergone phase change is positively correlated with the phase change coefficient. For example, if the phase change material layer is 2mm thick and the proportion of material that has undergone phase change is 50%, the corresponding phase change coefficient k is 1.2; if the phase change material layer is 1mm thick and the proportion of material that has undergone phase change is 50%, the corresponding phase change coefficient k is 1.35; if the phase change material layer is 1mm thick and the proportion of material that has undergone phase change is 70%, the corresponding phase change coefficient k is 1.65.

[0115] Furthermore, the phase change latent heat ΔH is the amount of heat absorbed or released per unit mass of the phase change material when it changes from one phase to another under isothermal and isobaric conditions. It is understood that the phase change latent heat ΔH is related to the components and proportions in the phase change material.

[0116] It is understood that, given the components and proportions of the phase change material, the above-mentioned phase change latent heat ΔH can be obtained through limited experiments using existing technologies and will not be elaborated here. For example, if the phase change material is composed of sodium nitrate, the corresponding phase change latent heat ΔH is 50 kcal / kg.

[0117] It can be understood that the medium specific heat capacity c 介 is the average specific heat capacity of the phase change material heat transfer medium, including but not limited to the contact surface between the phase change material and the phase change material layer, and the air between the phase change material layers. For example, if the contact surface between the phase change material and the phase change material layer has poor heat transfer properties, and air is used as the primary heat transfer medium, the corresponding medium specific heat capacity c is 1.004 kJ / (kg·K).

[0118] It can be understood that the medium specific heat capacity c 介 The medium specific heat capacity c is related to the actual setting mode and structure of the phase change material. The above medium specific heat capacity c can be obtained through limited experiments using existing technologies such as differential scanning calorimetry (DSC), and will not be elaborated here.

[0119] See also Figure 5 As shown, the control module compares the connection temperature with the corresponding standard value, specifically:

[0120] If the connection temperature is greater than or equal to the first safety temperature, the control module adjusts the output power of the inflatable cabinet to reduce the connection temperature of the inflatable cabinet;

[0121] If the connection temperature is greater than or equal to the second safety temperature, the control module shuts down the inflatable cabinet to reduce the connection temperature of the inflatable cabinet;

[0122] The second safety temperature is greater than the first safety temperature.

[0123] It is understood that the first safety temperature and the second safety temperature can be set arbitrarily according to the structure, material and usage time of the inflatable cabinet. For example, the first safety temperature is 50°C and the second safety temperature is 70°C.

[0124] The components described in the embodiments of this application may be implemented in hardware or software. The components described may also be provided in a system. For example, a temperature measurement system may be described as comprising a temperature measurement unit and a transmission unit. The names of these units do not, in some cases, limit the components themselves.

[0125] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functions and operations that may be implemented according to the systems and methods of various embodiments of the present application. In this regard, each box in the flowchart or block diagram can represent a module, program segment or part of a code, and the module, program segment or part of the code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in an order different from that marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flowchart, as well as the combination of boxes in the block diagram and / or flowchart, can be implemented with a dedicated hardware-based device that performs the specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0126] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. An intelligent temperature control system based on optical fiber temperature sensor, applied to the temperature control of the inflatable cabinet, characterized in that: include: An optical fiber temperature sensor is used to obtain the connection temperature of the connection component between the inflatable cabinet and the cable head in the form of an optical signal and transmit an output signal; The operating state of the optical fiber temperature sensor includes a stable state and a phase change state; a demodulation module connected to the plurality of optical fiber temperature sensors, configured to receive the plurality of output signals and demodulate the signals to determine the connection temperature; a correction module connected to the optical fiber temperature sensor, for correcting the measured temperature of the optical fiber temperature sensor to re-determine the connection temperature when the optical fiber temperature sensor is in the phase change state; a control module connected to the demodulation module, the correction module, and the inflatable cabinet, and configured to adjust the operating state of the inflatable cabinet according to the connection temperature; The operating state of the optical fiber temperature sensor includes the stable state and the phase change state, specifically: If the connection temperature is greater than or equal to the phase transition temperature, the operating state of the optical fiber temperature sensor corresponds to the phase transition state; If the connection temperature is lower than the phase transition temperature, the operation state of the optical fiber temperature sensor corresponds to the stable state; The optical fiber temperature sensor includes a temperature measuring part and an integrated part. The temperature measuring part includes a temperature measuring probe, a transmission optical fiber and a transmission interface. The temperature measuring probe is also coated with a phase change material layer, specifically: When the connection temperature is greater than the phase change temperature, the phase change material in the phase change material layer absorbs heat and melts from a solid state to a liquid state, so that the temperature of the temperature measuring probe is not greater than a threshold temperature; Wherein, the threshold temperature is greater than or equal to the phase transition temperature; When the connection temperature decreases from greater than the threshold temperature to less than the threshold temperature, the phase change material in the phase change material layer gradually cools and solidifies from a liquid state to a solid state; The physical state of the phase change material in the phase change material layer is determined only by the connection temperature, and the phase change material can be transformed from liquid to solid and from solid to liquid any number of times; When the optical fiber temperature sensor is in the phase change state, the correction module corrects the measured temperature to re-determine the connection temperature, specifically: The correction module determines the connection temperature secondarily according to the phase change latent heat, phase change coefficient and specific heat capacity of the phase change material layer: （1） Wherein, T' is the connection temperature determined by the correction module twice, Tmeasured is the measured temperature of the optical fiber temperature sensor, k is the phase change coefficient, ΔH is the phase change latent heat, c 介 is the specific heat capacity of the medium; The control module compares the connection temperature with a corresponding standard value, specifically: If the connection temperature is greater than or equal to a first safety temperature, the control module adjusts the output power of the inflatable cabinet to reduce the connection temperature of the inflatable cabinet; If the connection temperature is greater than or equal to a second safety temperature, the control module shuts down the inflatable cabinet to reduce the connection temperature of the inflatable cabinet; Wherein, the second safety temperature is greater than the first safety temperature.

2. The intelligent temperature control system based on optical fiber temperature sensor according to claim 1 is characterized in that: The temperature measuring unit is used to obtain the internal temperature of the inflatable cabinet and transmit the internal temperature to the transmission interface via the transmission optical fiber using the optical signal; The integrated part is connected to the temperature measuring part and includes an ST coupler and a receiving interface; The transmission interface is connected to the receiving interface via a thread; The integration unit is used to receive a plurality of the optical signals in the transmission optical fiber and combine them to form a single output signal.

3. The intelligent temperature control system based on optical fiber temperature sensor according to claim 2, characterized in that: One end of the temperature measuring part is the temperature measuring probe, and the other end is the transmission interface, specifically: The temperature measuring probe is integrally connected to the transmission optical fiber, and the transmission optical fiber is integrally connected to the transmission interface to form the temperature measuring portion; Wherein, the transmission optical fiber is a multimode optical fiber; Wherein, a raised conductive socket is provided at the inner center of the transmission interface.

4. The intelligent temperature control system based on optical fiber temperature sensor according to claim 3 is characterized in that: The integrated part combines the circuits to form a single output signal: The ST coupler uses cumulative averaging filtering to accumulate and average a plurality of the optical signals to form a single output signal.

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