CN119803719A - An intelligent temperature measuring device for an inflatable cabinet - Google Patents
An intelligent temperature measuring device for an inflatable cabinet Download PDFInfo
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- CN119803719A CN119803719A CN202510091228.4A CN202510091228A CN119803719A CN 119803719 A CN119803719 A CN 119803719A CN 202510091228 A CN202510091228 A CN 202510091228A CN 119803719 A CN119803719 A CN 119803719A
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- temperature
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- optical fiber
- inflatable cabinet
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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Abstract
The invention relates to the technical field of optical fiber temperature measuring devices, in particular to an intelligent temperature measuring device for an inflatable cabinet. The device comprises a sensing part, a transmission part and a control part, wherein the sensing part comprises a temperature sensing probe, a conductive optical fiber and a conductive interface, the temperature sensing probe is used for acquiring the internal temperature of an inflatable cabinet to be tested, the conductive optical fiber is used for transmitting the internal temperature in an optical signal mode, the sensing part is used for acquiring the internal temperature of the inflatable cabinet to be tested and transmitting the internal temperature to the conductive interface through the conductive optical fiber in an optical signal mode, the sensing part is connected with the transmission part and comprises an ST coupler and a receiving interface, and the transmission part is used for receiving and transmitting a single output signal. The arrangement of the phase change material layer further protects the temperature sensing probe from being damaged due to high temperature, so that the accuracy and the reliability of temperature measurement are ensured.
Description
Technical Field
The invention relates to the technical field of optical fiber temperature measuring devices, in particular to an intelligent temperature measuring device for an inflatable cabinet.
Background
The gas-filled cabinet is an important component in the power system, and key components inside the gas-filled cabinet, such as contacts, bus bars, cable joints and the like, can generate heat under high-current and long-time operation. If the heat dissipation is not timely or the contact resistance is too large, the temperature is increased, so that overheat faults are caused. Overheating not only can reduce the service life of equipment, but also can cause ageing of insulating materials and even cause serious accidents such as short circuit, fire and the like. Therefore, the internal temperature of the gas-filled cabinet is monitored in real time, the overheating problem can be found and processed in time, the occurrence of accidents is avoided, and the safe operation of the power system is ensured.
Therefore, how accurate obtaining of the internal temperature of the gas-filled cabinet is the weight of guaranteeing the normal operation of the gas-filled cabinet, for example, disclose an optical fiber temperature sensor for gas-filled cabinet in the prior art, including the outside protective housing, the left surface fixedly connected with connector of outside protective housing, the side surface of outside protective housing is provided with first recess, the surface fixedly connected with solid fixed ring of connector, the left end fixedly connected with helicitic texture of connector, the surface threaded connection of helicitic texture has the sleeve, telescopic inside fixedly connected with fiber body. The optical fiber temperature measuring sensor applied to the inflatable cabinet consists of an optical fiber temperature measuring sensor, a metal conduit and an ST coupler through the built-in optical fiber, wherein the built-in optical fiber temperature measuring sensor consists of an integrated temperature measuring sensor with one end being a sensing part and the optical fiber, and the other end being the ST coupler, so that the integrated temperature measuring sensor can be directly poured in a cable socket, the withstand voltage value can be increased, the electromagnetic interference can be avoided, and the length of the internal optical fiber can be customized.
However, in the technical scheme of the optical fiber temperature sensor applied to the inflatable cabinet, when the optical fiber temperature sensor is placed in a high-temperature environment for a long time, especially when the internal temperature of the inflatable cabinet frequently exceeds the highest use temperature threshold value of the optical fiber temperature sensor, the optical fiber temperature sensor is damaged in an irreversible way, so that the internal temperature of the inflatable cabinet acquired by the optical fiber temperature sensor is distorted, and the unreliability of monitoring the internal temperature of the inflatable cabinet is further caused.
Disclosure of Invention
The invention aims to provide an intelligent temperature measuring device for an inflatable cabinet, which aims to solve the problem that in the related art, when an optical fiber temperature measuring sensor is placed in a high-temperature environment for a long time, especially when the internal temperature of the inflatable cabinet frequently exceeds the highest use temperature threshold value of the optical fiber temperature measuring sensor, the optical fiber temperature sensor is damaged in an irreversible way, so that the internal temperature of the inflatable cabinet acquired by the optical fiber temperature measuring sensor is distorted, and the unreliability of monitoring the internal temperature of the inflatable cabinet is further caused.
Therefore, the invention provides an intelligent temperature measuring device for an inflatable cabinet, which comprises:
the sensing part comprises a temperature sensing probe, a conductive optical fiber and a conductive interface;
the temperature sensing probe is used for acquiring the internal temperature of the inflatable cabinet to be tested;
The conducting optical fiber is used for transmitting the internal temperature in the form of an optical signal;
the sensing part is used for acquiring the internal temperature of the inflatable cabinet to be tested and transmitting the internal temperature to the conduction interface through the conduction optical fiber in an optical signal;
A transmission unit connected to the sensing unit and including an ST coupler and a reception interface;
the transmission part is used for receiving one or more optical signals in the conducting optical fiber and combining the optical signals to form a single output signal;
The conduction interface is connected with the receiving interface through threads.
The conduction interface is connected with the receiving interface through threaded engagement, and specifically comprises:
the inner side surface of the conduction interface is provided with a thread tooth;
the outer side surface of the receiving interface is provided with a thread tooth;
the diameter of the conducting interface is larger than the diameter of the receiving interface.
One end of the sensing part is the temperature sensing probe, the other end is the conduction interface, and the sensing part specifically comprises:
The temperature sensing probe is integrally connected with the conducting optical fiber, and the conducting optical fiber is integrally connected with the conducting interface to form the sensing part.
The conductive interface is of a hollow structure, and a protruding conductive socket is arranged in the center of the inner side of the conductive interface.
The conducting interface, the receiving interface and the protruding conducting socket are all made of copper materials.
The conductive optical fiber consists of a conductive fiber core and a protective layer, and specifically comprises the following components:
The protective layer is coated on the outer side surface of the conductive fiber core, and the protective layer is made of polytetrafluoroethylene and has a thickness of 2mm.
And the ST coupler is symmetrically provided with a groove with the same depth.
Two pouring points are symmetrically arranged on the outer side surface of the ST coupler at the same horizontal height;
the two pouring points are symmetrically arranged, and any one of the pouring points is horizontally equidistant from the groove.
The outside of the temperature sensing probe is also coated with a phase change material layer, which is specifically:
when the internal temperature is higher than the threshold temperature, the phase change material in the phase change material layer is melted from solid state to liquid state through heat absorption, so that the induction temperature of the temperature sensing probe is not higher than the threshold temperature.
When the internal temperature is reduced from being higher than the threshold temperature to being lower than the threshold temperature, gradually cooling and solidifying the phase change material in the phase change material layer from a liquid state to form a solid state;
The phase change material layer is characterized in that the physical state of the phase change material in the phase change material layer is only determined by the internal temperature, and the phase change material can be converted from a liquid state to a solid state and from the solid state to the liquid state for any plurality of times.
The beneficial effects of the invention are as follows:
The intelligent temperature measuring device for the inflatable cabinet can accurately monitor the internal temperature of the inflatable cabinet in real time through the integrated high-precision temperature measuring device, and can accurately acquire and transmit the internal temperature of the inflatable cabinet in real time through the integrated temperature sensing probe and the conductive optical fiber which are connected with each other and the high-efficiency optical signal transmission mode. The arrangement of the phase change material layer further protects the temperature sensing probe from being damaged due to high temperature, so that the accuracy and the reliability of temperature measurement are ensured.
Further, when the internal temperature exceeds the threshold temperature, the phase-change material layer can absorb heat and melt, so that the temperature of the temperature sensing probe is reduced, and the temperature sensing probe is prevented from being damaged due to high temperature. When the temperature is reduced below the threshold value, the phase change material can solidify again, and the protection for the temperature sensing probe is continuously provided. The mechanism ensures that the device can stably operate in a high-temperature environment for a long time, and improves the high-temperature resistance, thereby ensuring the accuracy and the reliability of temperature measurement.
Further, the phase change material layer is helpful to prolong the service life of the whole temperature measuring device by protecting the temperature sensing probe from high temperature damage. This reduces the cost of replacement and maintenance, improving the economy and practicality of the device.
Further, the conducting interface is connected with the receiving interface through threaded engagement, so that the installation and the disassembly processes are simpler and more convenient. The connecting mode also provides good sealing performance, prevents external factors such as dust, moisture and the like from influencing the device, and further improves the reliability and the stability of the device.
Drawings
FIG. 1 is a block diagram of an intelligent temperature measuring device for an inflatable cabinet in an embodiment of the invention;
FIG. 2 is a schematic structural diagram of an intelligent temperature measuring device for an air-filled cabinet according to an embodiment of the present invention;
FIG. 3 is a schematic view of a partially enlarged structure of a conductive interface according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a partial enlarged structure of an ST coupler according to an embodiment of the present invention;
FIG. 5 is a schematic view of a partial enlarged structure of a temperature sensing probe according to an embodiment of the present invention;
The temperature sensing probe comprises a temperature sensing probe body 1, a conductive optical fiber 2, a conductive interface 3, a receiving interface 4, a 5ST coupler, a protruding type conductive socket 6, a pouring point 7 and a phase change material layer 8.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
For a better understanding of the present invention, the terms in the present invention are explained as follows:
combining, namely combining two or more optical fiber signals to form a single optical fiber signal.
Integrated connection, namely non-detachable and separated fixed connection.
Referring to fig. 1 and 2, the intelligent temperature measuring device for an air charging cabinet provided by the invention includes:
The sensing part comprises a temperature sensing probe 1, a conductive optical fiber 2 and a conductive interface 3;
The temperature sensing probe 1 is used for acquiring the internal temperature of the inflatable cabinet to be tested;
the conducting optical fiber 2 is used for transmitting the internal temperature in the form of an optical signal;
the sensing part is used for acquiring the internal temperature of the inflatable cabinet to be detected and transmitting the internal temperature to the conduction interface 3 through the conduction optical fiber 2 by an optical signal;
A transmission unit connected to the induction unit and including an ST coupler 5 and a reception interface 4;
The transmission part is used for receiving one or more optical signals in the conducting optical fiber and combining the optical signals to form a single output signal;
In a specific embodiment, the length of the conductive optical fiber 2 is 3 m-50 m, the bending radius is not less than 4.4cm, and the dimension diameter is 2mm.
It will be appreciated that the length of the conductive optical fiber 2 may be correspondingly set according to the size of the practical application site.
In detail, the temperature sensing probe is characterized in that after the fluorescent material doped with rare ions is excited by light with a specific wavelength, the fluorescent material transits from a ground state to an excited state, then returns to the ground state in a radiation transition mode, emits characteristic fluorescence, and changes the ground state and the excited state particle number distribution of the rare ions along with the rise of temperature, so that parameters such as fluorescence spectrum intensity, fluorescence peak position, fluorescence service life and the like are changed. By establishing a calibration relation between the fluorescent parameter and the temperature, accurate measurement of the temperature can be realized. The method can be used for obtaining the accurate temperature in the conical socket in the gas cabinet to be detected.
Furthermore, the ST coupler is widely applied to local area networks, wide area networks, optical fiber communication systems and data centers, is suitable for connecting multimode optical fibers and single-mode optical fibers, and supports high-speed data transmission.
Further, the above-mentioned conducting optical fiber adopts a multimode optical fiber, which allows the optical signal to be incident at various angles and simultaneously transmits the optical signal of various propagation modes (i.e., various different paths or phases) by using a larger core diameter, thereby realizing the transmission of the optical signal.
In the above steps, the intelligent temperature measuring device for the inflatable cabinet provided by the embodiment can accurately monitor the internal temperature of the inflatable cabinet in real time through the integrated high-precision temperature measuring device, and can accurately acquire and transmit the internal temperature of the inflatable cabinet in real time through the integrated connected temperature sensing probe and the conductive optical fiber and the efficient optical signal transmission mode. The arrangement of the phase change material layer further protects the temperature sensing probe from being damaged due to high temperature, so that the accuracy and the reliability of temperature measurement are ensured.
Further, when the internal temperature exceeds the threshold temperature, the phase-change material layer can absorb heat and melt, so that the temperature of the temperature sensing probe is reduced, and the temperature sensing probe is prevented from being damaged due to high temperature. When the temperature is reduced below the threshold value, the phase change material can solidify again, and the protection for the temperature sensing probe is continuously provided. The mechanism ensures that the device can stably operate in a high-temperature environment for a long time, and improves the high-temperature resistance, thereby ensuring the accuracy and the reliability of temperature measurement.
Further, the phase change material layer is helpful to prolong the service life of the whole temperature measuring device by protecting the temperature sensing probe from high temperature damage. This reduces the cost of replacement and maintenance, improving the economy and practicality of the device.
Further, the conducting interface is connected with the receiving interface through threaded engagement, so that the installation and the disassembly processes are simpler and more convenient. The connecting mode also provides good sealing performance, prevents external factors such as dust, moisture and the like from influencing the device, and further improves the reliability and the stability of the device.
The conduction interface is connected with the receiving interface through threads.
Specifically, the conduction interface is connected with the receiving interface through threaded engagement, specifically:
The inner side surface of the conduction interface is provided with a thread tooth;
the outer side surface of the receiving interface is provided with a thread tooth;
The diameter of the conductive interface is larger than the diameter of the receiving interface.
In a specific embodiment, the inner surface of the conductive interface is provided with screw threads, which are arranged in a spiral pattern to provide a secure mechanical connection, and the outer surface of the receiving interface is provided with mating screw threads accordingly. In the connecting process, the diameter of the conducting interface is slightly larger than that of the receiving interface, so that the receiving interface can be easily screwed into the conducting interface until the thread tooth openings of the receiving interface and the conducting interface are tightly meshed to form stable and reliable connection. The screw connection mode not only ensures the tight connection between the conduction interface and the receiving interface, but also provides good sealing performance and prevents the influence of external factors on the inside of the device.
Further, sensing part one end is the temperature sensing probe, and the other end is the conduction interface, specifically does:
The temperature sensing probe is connected with the conducting optical fiber in an integrated mode, and the conducting optical fiber is connected with the conducting interface in an integrated mode to form the sensing part.
In implementation, each part of the sensing part is connected in an integrated manner, so that the fault risk caused by poor connection or loose interface is reduced, the stability and consistency of optical signals are maintained, the accuracy of temperature measurement is improved, meanwhile, the installation process of the system is simplified due to the integrated connection, the installation steps and the required time are reduced, the maintenance and the overhaul are also facilitated, and the maintenance cost and the difficulty are reduced.
Referring to fig. 3, the conductive interface 3 has a hollow structure, and a protruding conductive socket 6 is disposed at the center of the inner side of the conductive interface 3.
In a specific embodiment, the conducting interface 3 of the optical fiber temperature measuring sensor is firmly connected with the receiving interface in a threaded engagement mode, and the protruding conducting socket 6 designed in the conducting interface is automatically aligned and inserted into the corresponding slot of the receiving interface after being connected, so that the temperature information in the inflatable cabinet, namely, the high-efficiency and stable transmitted optical signals in the conducting optical fiber, can be ensured to be accurately transmitted to the receiving interface, and further, the acquisition and the processing of the temperature data in the inflatable cabinet are realized.
As the preferable technical proposal of the intelligent temperature measuring device for the air charging cabinet, the conducting interface, the receiving interface and the protruding conducting socket are all made of copper materials.
As the preferable technical scheme of intelligent temperature measuring device for the inflatable cabinet, the copper material is selected to form the conduction interface, the receiving interface and the protruding conduction socket, and the characteristics of the conduction interface, the receiving interface, the protruding conduction socket are mainly beneficial to the excellent conductivity, the corrosion resistance, the thermal stability, the high strength and the wear resistance of copper, the characteristics of the conduction interface, the receiving interface and the protruding conduction socket ensure the low loss and the stability of signals in the transmission process, the accuracy and the reliability of the temperature measuring device are improved, meanwhile, the copper material is easy to process and connect, and the customization and the installation according to actual requirements are convenient, so that the efficient, stable and reliable operation of the temperature measuring device in the complex environment inside the inflatable cabinet is ensured.
Further, the conductive optical fiber is composed of a conductive fiber core and a protective layer, specifically:
The protective layer is coated on the outer side surface of the conductive fiber core, and the protective layer is made of polytetrafluoroethylene and has a thickness of 2mm.
In a specific embodiment, the optical fiber protective sleeve is made of polytetrafluoroethylene material, can be used at-180-260 ℃ for a long time, has the characteristics of acid resistance, alkali resistance, various organic solvents resistance, high temperature resistance and the like, and is made of polytetrafluoroethylene material with the diameter of 2mm, so that the optical fiber protective sleeve is more suitable for pouring of cable joints.
The ST coupler is symmetrically provided with a groove with the same depth.
The groove design enables the ST coupler to provide more accurate positioning when connected to other equipment or fiber optic connectors. It is ensured that the coupler can be accurately aligned and inserted into the corresponding slot or interface, thereby avoiding signal transmission problems due to misalignment.
Referring to fig. 4, two pouring points are symmetrically arranged on the outer side surface of the ST coupler at the same horizontal height;
wherein, two are pour symmetrical setting, and arbitrary pouring point and equidistant from the recess level.
In a specific embodiment, the intelligent temperature measuring device for the inflatable cabinet is embedded into a product when the plug is poured and is completely embedded with the plug, the original forms of the plug and the cable head are not changed, the performances of the cable head and the whole cabinet are not reduced, and the plug and the whole machine of the intelligent temperature measuring device for the preset inflatable cabinet can normally pass through a partial discharge test, a pressure resistance test and the like. Preferably, the tensile strength of the pouring point is 40-100N.
Referring to fig. 5, the temperature sensing probe 1 is further coated with a phase change material layer 8, specifically:
when the internal temperature is greater than the threshold temperature, the phase change material in the phase change material layer 8 is melted from solid to liquid by absorbing heat, so that the sensing temperature of the temperature sensing probe 1 is not greater than the threshold temperature.
When the internal temperature is reduced from more than the threshold temperature to less than the threshold temperature, the phase change material in the phase change material layer 9 is gradually cooled and solidified from a liquid state to form a solid state;
The phase change material layer 8 is only determined by the internal temperature, and the phase change material can be changed from the liquid state to the solid state and vice versa for any number of times.
It is understood that the above-mentioned threshold temperature may be set arbitrarily according to the applicable temperature measurement range of the temperature sensing probe 1, and the temperature measurement range of the temperature sensing probe 1 is, for example, -40 ℃ to 260 ℃, and the threshold temperature is set to 300 ℃.
In detail, the phase change material is capable of absorbing or releasing a large amount of heat at a specific temperature, releasing stored energy through a phase change process to maintain temperature stability or perform thermal energy transfer.
In practice, the phase change material in the phase change material layer 8 may be a metal alloy, such as ferrite and austenite phase change materials, and when heated to about 300 degrees, ferrite-to-austenite transformation occurs, or vice versa when cooled. But also a molten salt such as sodium nitrate (NaNO 3) which has a melting point of about 307C, at which temperature it will change from a solid state to a liquid state and absorb a significant amount of heat.
In the implementation, the internal temperature of the inflatable cabinet is output to a digital signal through the sensing part and the transmission part, and the method can be applied to the background in a personalized way, such as alarming, early warning notification, remote monitoring and the like, and can also be used for accessing the internal temperature information of the inflatable cabinet to other systems.
The components described in the embodiments of the present application may be implemented by hardware or software. The described components may also be provided in a system, for example, a thermometry system may be described comprising a thermometry unit, a transmission unit, wherein the names of these units do not in some cases constitute a limitation of the component itself.
The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems and methods according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based devices which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
It is to be understood that the above examples of the present invention are provided for clarity of illustration only and are not limiting of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202510091228.4A CN119803719A (en) | 2025-01-21 | 2025-01-21 | An intelligent temperature measuring device for an inflatable cabinet |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202510091228.4A CN119803719A (en) | 2025-01-21 | 2025-01-21 | An intelligent temperature measuring device for an inflatable cabinet |
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| Publication Number | Publication Date |
|---|---|
| CN119803719A true CN119803719A (en) | 2025-04-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202510091228.4A Pending CN119803719A (en) | 2025-01-21 | 2025-01-21 | An intelligent temperature measuring device for an inflatable cabinet |
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Citations (5)
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| CN1897877A (en) * | 2004-09-24 | 2007-01-17 | 株式会社东芝 | Ultrasonic probe |
| JP2011133275A (en) * | 2009-12-23 | 2011-07-07 | Pilot Ink Co Ltd | Reversible thermochromism recording material |
| CN113056233A (en) * | 2018-12-07 | 2021-06-29 | 通用电气公司 | Ultrasonic probe and preparation method thereof |
| CN117387790A (en) * | 2023-10-30 | 2024-01-12 | 天津创发科技有限公司 | Optical fiber temperature measurement sensor applied to switch cabinet |
| CN118565652A (en) * | 2023-02-28 | 2024-08-30 | 奇贵赐股份有限公司 | Temperature sensor |
-
2025
- 2025-01-21 CN CN202510091228.4A patent/CN119803719A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1897877A (en) * | 2004-09-24 | 2007-01-17 | 株式会社东芝 | Ultrasonic probe |
| JP2011133275A (en) * | 2009-12-23 | 2011-07-07 | Pilot Ink Co Ltd | Reversible thermochromism recording material |
| CN113056233A (en) * | 2018-12-07 | 2021-06-29 | 通用电气公司 | Ultrasonic probe and preparation method thereof |
| CN118565652A (en) * | 2023-02-28 | 2024-08-30 | 奇贵赐股份有限公司 | Temperature sensor |
| CN117387790A (en) * | 2023-10-30 | 2024-01-12 | 天津创发科技有限公司 | Optical fiber temperature measurement sensor applied to switch cabinet |
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