Silver-platinum thermoelectric temperature sensor for radiation pyrometry and method for making the same

Abstract

The present invention proposes a silver-platinum thermoelectric temperature sensor for radiative high temperature measurement and a preparation method thereof, comprising an optical fiber, a dielectric slurry transition layer, a silver electrode layer, a dielectric slurry insulating layer, a platinum electrode layer, a dielectric slurry oxide layer and a Fabry-Perot cavity structure arranged sequentially from the inside to the outside; the optical fiber, the dielectric slurry transition layer, the silver electrode layer, the dielectric slurry insulating layer, the platinum electrode layer and the dielectric slurry oxide layer are flush at one end, and the length of the other end decreases layer by layer from the inside to the outside; the Fabry-Perot cavity structure includes a reflector formed at the end of the optical fiber and another reflector formed by plating a high-reflection film at the end of the optical fiber, and a cavity between the two. The sensor of the present invention has the characteristics of high sensitivity, fast response and high stability, is suitable for temperature monitoring in extreme environments, and greatly expands the application range of the silver-platinum thermoelectric temperature sensor.

Description

Technical Field

[0001] The present invention relates to the technical field of radiation high temperature measurement and monitoring system, in particular to a silver-platinum thermoelectric temperature sensor for radiation high temperature measurement and a preparation method thereof. Background Art

[0002] With the increasing requirements for temperature measurement accuracy and real-time performance in modern industry and scientific research, traditional temperature measurement technology has gradually failed to meet the needs of accurate temperature measurement in extreme environments. In particular, in situations where remote monitoring, high response speed or temperature measurement in a small space is required, traditional temperature measurement methods are unable to meet the needs.

[0003] In this context, fiber optic sensor technology has attracted attention due to its unique advantages. Fiber optic sensors have the advantages of strong anti-electromagnetic interference ability, small size, light weight, bendability, high temperature and high pressure resistance, etc., which are very suitable for measurements in extreme environments. Since silver and platinum have good thermoelectric properties, they can be used as electrode materials for thermocouples to determine the temperature by measuring the potential difference between the two ends.

[0004] However, the traditional silver-platinum thermocouple has a complex manufacturing process, high cost, and is difficult to integrate with optical fiber. Summary of the invention

[0005] In order to solve the above technical problems existing in the prior art, the present invention proposes a silver-platinum thermoelectric temperature sensor for radiation high temperature measurement and a preparation method and a temperature measurement method thereof, thereby solving the above technical problems.

[0006] According to a first aspect of the present invention, a silver-platinum thermoelectric temperature sensor for radiation high temperature measurement is proposed, comprising an optical fiber, a dielectric slurry transition layer, a silver electrode layer, a dielectric slurry insulating layer, a platinum electrode layer, a dielectric slurry oxide layer and a Fabry-Perot cavity structure arranged in sequence from the inside to the outside; the dielectric slurry transition layer is formed by immersion-lifting and printing on the surface of the optical fiber, the silver electrode layer is formed by immersion-lifting and printing on the surface of the dielectric slurry transition layer, the dielectric slurry insulating layer is formed by immersion-lifting and printing on the surface of the silver electrode layer, the platinum electrode layer is formed by immersion-lifting and printing on the surface of the dielectric slurry insulating layer, and the dielectric slurry oxide layer is formed by immersion-lifting and printing on the surface of the platinum electrode layer; and the optical fiber, the dielectric slurry transition layer, the silver electrode layer, the dielectric slurry insulating layer, the platinum electrode layer and the dielectric slurry oxide layer are flush at one end, and the length of the other end decreases layer by layer from the inside to the outside; the Fabry-Perot cavity structure includes a reflector formed at the end of the optical fiber and another reflector formed by coating a high-reflection film at the end of the optical fiber, and a cavity between the two.

[0007] In some specific embodiments, the dielectric slurry transition layer, the silver electrode layer, the dielectric slurry insulating layer, the platinum electrode layer and the dielectric slurry oxide layer are printed in sequence by the immersion pulling technology, and the specific parameter settings include: when immersing and pulling the dielectric slurry transition layer, the descending rate is set to 100 μm / s, the immersion depth is 9 mm, the immersion time is 120 s, and the rising rate is 10 μm / s; when immersing and pulling the silver electrode layer, the descending rate is set to 100 μm / s, the immersion depth is 8 mm, the immersion time is 120 s, and the rising rate is 1 0μm / s; immersion and pulling of dielectric slurry insulating layer, set the descending rate to 100μm / s, immersion depth to 7mm, immersion time to 120s, and rising rate to 10μm / s; immersion and pulling of platinum electrode layer, set the descending rate to 100μm / s, immersion depth to 6mm, immersion time to 120s, and rising rate to 10μm / s; immersion and pulling of dielectric slurry oxide layer, set the descending rate to 100μm / s, immersion depth to 5mm, immersion time to 120s, and rising rate to 10μm / s.

[0008] In some specific embodiments, the thickness of the dielectric slurry transition layer, the silver electrode layer, the dielectric slurry insulation layer, the platinum electrode layer, and the dielectric slurry oxide layer are all 20 μm, and the optical fiber diameter is 0.125 mm. Appropriate layer thickness helps to ensure that the performance of each layer of material is fully utilized. For example, the specific thickness of the silver electrode layer and the platinum electrode layer can achieve stable signal transmission while ensuring good thermoelectric performance; the thickness of the dielectric slurry layer can take into account the functions of insulation, transition and protection, and at the same time match the optical fiber diameter, making the entire sensor structure more physically stable and reliable, which is conducive to improving the overall performance and measurement accuracy of the sensor.

[0009] In some specific embodiments, the surfaces of the silver electrode layer and the platinum electrode layer are connected to silver wires and platinum wires respectively for signal extraction. Silver and platinum are excellent conductive materials, and their wire connection ensures low loss and high stability of the signal during transmission, reduces signal interference, ensures the accuracy of the measurement results, enables the sensor to accurately reflect temperature changes, and provides a reliable signal source for subsequent temperature data processing and analysis.

[0010] In some specific embodiments, the optical fiber is 10 mm long and 0.125 mm in diameter. While ensuring sufficient light transmission capacity and mechanical strength, the optical fiber of this size is compatible with the other layers of structure to form a compact and fully functional temperature sensor. The appropriate length helps to control the overall size of the sensor, making it more flexible in application; while the specific diameter affects the transmission characteristics of light in the optical fiber and the interaction with other layer materials, ensuring the accuracy and stability of the sensor during temperature measurement.

[0011] According to a second aspect of the present invention, a method for preparing the silver-platinum thermoelectric temperature sensor as described above is provided, comprising:

[0012] S1: The dielectric slurry transition layer, silver electrode layer, dielectric slurry insulation layer, platinum electrode layer and dielectric slurry oxide layer are printed on the optical fiber in sequence by using the dip-pull technique;

[0013] S2: A high-reflection film is coated on the end of the optical fiber to form a reflector of the Fabry-Perot cavity structure.

[0014] In some specific embodiments, in S1, the dielectric slurry transition layer, the silver electrode layer, the dielectric slurry insulating layer, the platinum electrode layer and the dielectric slurry oxide layer are printed in sequence by the immersion and pulling technology. The specific parameter settings include: when immersing and pulling the dielectric slurry transition layer, the descending rate is set to 100 μm / s, the immersion depth is 9 mm, the immersion time is 120 s, and the rising rate is 10 μm / s; when immersing and pulling the silver electrode layer, the descending rate is set to 100 μm / s, the immersion depth is 8 mm, the immersion time is 120 s, and the rising rate is 10μm / s; dip and pull the dielectric slurry insulation layer, set the descending rate to 100μm / s, the dipping depth to 7mm, the dipping time to 120s, and the rising rate to 10μm / s; dip and pull the platinum electrode layer, set the descending rate to 100μm / s, the dipping depth to 6mm, the dipping time to 120s, and the rising rate to 10μm / s; dip and pull the dielectric slurry oxide layer, set the descending rate to 100μm / s, the dipping depth to 5mm, the dipping time to 120s, and the rising rate to 10μm / s. When dip and pull each layer, set specific parameters such as descending rate, dipping depth, dipping time, and rising rate, which can accurately control the adhesion and distribution uniformity of each layer of material on the optical fiber surface.

[0015] In some specific embodiments, the dielectric slurry transition layer, the dielectric slurry insulating layer, and the dielectric slurry oxidation layer are cured at 800° C. for 30 minutes.

[0016] In some specific embodiments, the silver electrode layer and the platinum electrode layer are cured at 1000°C for 30 minutes. High temperature curing can promote the complete chemical reaction in the dielectric slurry, improve its hardness, strength and chemical stability, thereby enhancing its insulation performance, protecting the function of the internal electrode layer and its adaptability as a transition layer, ensuring that each layer can function stably during the operation of the sensor and improving the reliability and durability of the sensor.

[0017] According to a third aspect of the present invention, a temperature measurement method using the silver-platinum thermoelectric temperature sensor as described above is provided, comprising:

[0018] The temperature change is monitored by using the resonant wavelength change of the Fabry-Perot cavity structure;

[0019] The optical signal reflected by the Fabry-Perot cavity is received by a photodetector;

[0020] Convert optical signals into electrical signals;

[0021] The electrical signal is demodulated by an electronic demodulator to obtain temperature information. The temperature change is monitored by using the change in the resonant wavelength of the Fabry-Perot cavity structure. Based on the optical interference principle of the Fabry-Perot cavity, its resonant wavelength is extremely sensitive to temperature and can accurately reflect tiny temperature changes. By monitoring the change in the resonant wavelength, high-precision temperature measurement can be achieved, and the measurement accuracy can reach a high level, meeting application scenarios with demanding requirements for temperature measurement accuracy, such as high-precision temperature control experiments in scientific research, temperature monitoring of precision machining processes in industrial production, etc.

[0022] The silver-platinum thermoelectric temperature sensor for radiation high temperature measurement proposed in the present invention, as well as its preparation method and temperature measurement method, can not only realize the integrated integration of silver-platinum thermocouple and optical fiber, but also simplify the manufacturing process, reduce costs, and improve production efficiency through the dip-pull printing technology, while maintaining the performance and reliability of the sensor. This application can provide a new solution for high temperature measurement and promote the application and development of optoelectronic integrated systems in the fields of industry and scientific research. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are included to provide a further understanding of the embodiments and are incorporated into and constitute a part of this specification. The accompanying drawings illustrate the embodiments and together with the description are used to explain the principles of the present invention. Other embodiments and many of the expected advantages of the embodiments will be readily appreciated as they become better understood by reference to the following detailed description. Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of the non-limiting embodiments made with reference to the following drawings:

[0024] Figure 1 is a schematic structural diagram of a silver-platinum thermoelectric temperature sensor according to an embodiment of the invention;

[0025] Figure 2 is a flow chart of a method for preparing a silver-platinum thermoelectric temperature sensor according to an embodiment of the invention;

[0026] Figure 3 is a flow chart of a temperature measurement method according to an embodiment of the invention. DETAILED DESCRIPTION

[0027] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It should also be noted that, for ease of description, only the parts related to the relevant invention are shown in the accompanying drawings.

[0028] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0029] Figure 1 FIG. 4 shows a schematic structural diagram of a silver-platinum thermoelectric temperature sensor according to an embodiment of the invention. Figure 1 As shown, the silver-platinum thermoelectric temperature sensor includes an optical fiber 1, a dielectric slurry transition layer 2, a silver electrode layer 3, a dielectric slurry insulating layer 4, a platinum electrode layer 5, and a dielectric slurry oxide layer 6, which are printed sequentially from the inside to the outside. The optical fiber 1, the dielectric slurry transition layer 2, the silver electrode layer 3, the dielectric slurry insulating layer 4, the platinum electrode layer 5, and the dielectric slurry oxide layer 6 are flush at one end, the length of the dielectric slurry transition layer 2 is shorter than the length of the optical fiber 1, the length of the silver electrode layer 3 is slightly shorter than the dielectric slurry transition layer 2, the length of the dielectric slurry insulating layer 4 is slightly shorter than the silver electrode layer 3, the length of the platinum electrode layer 5 is slightly shorter than the dielectric slurry insulating layer 4, and the length of the dielectric slurry oxide layer 6 is slightly shorter than the platinum electrode layer 5. A reflector formed at the end of the optical fiber 1 and another reflector formed by coating a high-reflection film at the end of the optical fiber 1, as well as a cavity between the two, form a Fabry-Perot cavity structure. By arranging the optical fiber 1, the dielectric slurry transition layer 2, the silver electrode layer 3, the dielectric slurry insulation layer 4, the platinum electrode layer 5, the dielectric slurry oxide layer 6 and the Fabry-Perot cavity structure from the inside to the outside, the integration of multiple functional components on the optical fiber is realized, and a complete temperature sensor system is formed. The layers work together, which can not only use the silver-platinum thermoelectric effect to generate a potential difference to reflect the temperature change, but also use the resonance characteristics of the Fabry-Perot cavity structure to measure the temperature with high precision, thus realizing the integration of the temperature measurement function. The design of the optical fiber 1 and each layer with one end flush and the other end decreasing layer by layer helps to optimize the physical connection and signal transmission path between the layers while ensuring the compactness of the overall structure of the sensor. This structure can reduce unnecessary space occupation, make the sensor more compact in size, and is conducive to use in small spaces or application scenarios with high space requirements. It is also convenient for operation and control during the manufacturing process. The Fabry-Perot cavity structure consists of a reflector at the end of the optical fiber, another reflector formed by coating a high-reflection film, and a cavity between the two. Using the optical interference principle of the Fabry-Perot cavity, its resonant wavelength is extremely sensitive to temperature changes. When the temperature changes, the optical length inside the Fabry-Perot cavity will change, resulting in a change in the resonant wavelength. By monitoring the change in the resonant wavelength, accurate temperature measurement can be achieved, greatly improving the sensitivity and measurement accuracy of the temperature sensor.

[0030] In a specific embodiment, the length of the optical fiber 1 is 10 mm and the diameter is 0.125 mm. The thickness of the dielectric slurry transition layer 2, the silver electrode layer 3, the dielectric slurry insulation layer 4, the platinum electrode layer 5, and the dielectric slurry oxide layer 6 are all 20 μm. The optical fiber of this size is compatible with the other layers while ensuring sufficient light transmission capacity and mechanical strength, and together constitutes a compact and fully functional temperature sensor. The appropriate length helps to control the overall size of the sensor, making it more flexible in application; while the specific diameter affects the transmission characteristics of light in the optical fiber and the interaction with other layer materials, ensuring the accuracy and stability of the sensor during temperature measurement. The appropriate layer thickness helps to ensure that the performance of each layer of material is fully utilized. For example, the specific thickness of the silver electrode layer and the platinum electrode layer can achieve stable signal transmission while ensuring good thermoelectric performance; the thickness of the dielectric slurry layer can take into account the functions of insulation, transition and protection, and at the same time match the diameter of the optical fiber, making the entire sensor structure more physically stable and reliable, which is conducive to improving the overall performance and measurement accuracy of the sensor. Fixed layer thickness and fiber diameter provide standardized parameters for sensor manufacturing, making it easier to control product quality, improve production efficiency and reduce production costs during mass production. Manufacturers can use a unified process to produce according to these clear dimensional requirements to ensure the performance consistency of each sensor, thereby improving product reliability and market competitiveness.

[0031] In a specific embodiment, the surfaces of the silver electrode layer 3 and the platinum electrode layer 6 are respectively connected to the silver wire 7 and the platinum wire 8 for signal extraction. This connection method can efficiently transmit the potential difference signal generated by the silver-platinum thermoelectric effect to the external measurement circuit. Silver and platinum are excellent conductive materials, and their wire connection ensures low loss and high stability of the signal during transmission, reduces signal interference, ensures the accuracy of the measurement results, enables the sensor to accurately reflect the temperature change, and provides a reliable signal source for subsequent temperature data processing and analysis. By extracting the signal through the wire, the silver-platinum thermoelectric temperature sensor can be easily integrated with other electronic devices or measurement systems. Whether it is connected to a data acquisition card, a temperature monitoring instrument or an automated control system, seamless docking can be achieved through a standard electrical interface, which is convenient for building a more complex temperature measurement and control system, broadens the application range of the sensor, and meets the needs of temperature monitoring in different fields and scenarios.

[0032] In a specific embodiment, the dielectric slurry transition layer is formed by dip-lift printing on the surface of the optical fiber, the silver electrode layer is formed by dip-lift printing on the surface of the dielectric slurry transition layer, the dielectric slurry insulating layer is formed by dip-lift printing on the surface of the silver electrode layer, the platinum electrode layer is formed by dip-lift printing on the surface of the dielectric slurry insulating layer, and the dielectric slurry oxidation layer is formed by dip-lift printing on the surface of the platinum electrode layer. The dip-lift printing technology is used to form each layer in sequence on the surface of the optical fiber, and the thickness and uniformity of each layer of material can be accurately controlled to ensure good adhesion of each layer on the surface of the optical fiber. The dip-lift process can make the material evenly distributed on the surface of the optical fiber, avoiding problems such as uneven thickness or material agglomeration, thereby ensuring the performance consistency and stability of the sensor. Each layer is formed in sequence by dip-lift printing, so that two adjacent layers can be tightly combined. During the printing process, each layer of material is in full contact with the lower layer of material in a liquid state, and after curing, chemical bonding or physical adsorption is formed, which enhances the bonding force between layers, prevents peeling or loosening between layers, improves the integrity and reliability of the sensor structure, and is conducive to the long-term stable operation of the sensor in complex environments, reducing performance degradation or failures caused by interlayer problems.

[0033] Figure 2 A flow chart of a method for preparing a silver-platinum thermoelectric temperature sensor according to an embodiment of the invention is shown. Figure 2 As shown, the following steps are included:

[0034] S201: Printing a dielectric slurry transition layer, a silver electrode layer, a dielectric slurry insulating layer, a platinum electrode layer and a dielectric slurry oxide layer in sequence on the optical fiber using a dip-pull technique.

[0035] In a specific embodiment, by setting specific parameters such as the descent rate, immersion depth, immersion time and rise rate when each layer is dipped and printed, the amount of material attached to the optical fiber surface and the uniformity of distribution can be accurately controlled. For example, different immersion depths and times can ensure that each layer of material reaches the expected thickness, while the appropriate descent and rise rates help to evenly coat the material on the optical fiber surface, avoiding problems such as uneven thickness or poor material flow, thereby ensuring the quality and performance consistency of each layer, thereby improving the overall performance and measurement accuracy of the sensor. The parameters of the immersion pulling in the present application are set as follows: when immersing and pulling the dielectric slurry transition layer, the descending rate is set to 100 μm / s, the immersion depth is 9 mm, the immersion time is 120 s, and the rising rate is 10 μm / s; when immersing and pulling the silver electrode layer, the descending rate is set to 100 μm / s, the immersion depth is 8 mm, the immersion time is 120 s, and the rising rate is 10 μm / s; when immersing and pulling the dielectric slurry insulating layer, the descending rate is set to 100 μm / s, the immersion depth is 7 mm, the immersion time is 120 s, and the rising rate is 10 μm / s; when immersing and pulling the platinum electrode layer, the descending rate is set to 100 μm / s, the immersion depth is 6 mm, the immersion time is 120 s, and the rising rate is 10 μm / s; when immersing and pulling the dielectric slurry oxide layer, the descending rate is set to 100 μm / s, the immersion depth is 5 mm, the immersion time is 120 s, and the rising rate is 10 μm / s. According to the characteristics of different layers of materials, the structural relationship between the layers can be optimized through the above precise parameter settings. For example, when printing the silver electrode layer and the platinum electrode layer, the appropriate parameters can ensure the density and good conductivity of the electrode material; in the printing of the dielectric slurry layer, precise parameter control helps to achieve good insulation performance and transition effect, so that the layers can cooperate with each other to achieve the best state, together forming a high-performance temperature sensor, and improving the sensor's response speed and accuracy to temperature changes.

[0036] In a specific embodiment, when printing a silver-platinum thermoelectric temperature sensor using the immersion pulling method, the most important factor affecting the thickness of each layer is the rising rate during pulling (the falling rate and the immersion depth have no effect on the film thickness, and the different immersion depths are only to prevent the film layer printed later from completely covering the film layer printed earlier, so that each layer is partially exposed). After using a certain gradient of rising rate for parameter exploration, this application found that when the rising rate is 10μm / s, the thickness of the printed dielectric slurry layer and electrode layer is about 20μm. As shown in the following table:

[0037] Rising rate / μm / s 5 10 15 20 Average film thickness / μm 14，2 20，0 24．5 28.3

[0038] In a specific embodiment, the dielectric slurry transition layer, dielectric slurry insulation layer, and dielectric slurry oxide layer are cured at 800°C for 30 minutes. This specific curing condition can fully cure the dielectric slurry to form a stable structure. High temperature curing can promote the complete chemical reaction in the dielectric slurry, improve its hardness, strength and chemical stability, thereby enhancing its insulation performance, protecting the internal electrode layer and its adaptability as a transition layer, ensuring that each layer can function stably during the operation of the sensor, and improving the reliability and durability of the sensor. Appropriate curing conditions help to eliminate the internal stress that may be generated by the dielectric slurry during the printing process, and prevent interlayer cracking or material performance changes due to stress release during subsequent use. Through sufficient curing, the dielectric slurry layer can better maintain its shape and physical and chemical properties, provide a stable support and insulation environment for the silver electrode layer and the platinum electrode layer, and ensure that the optical performance of the Fabry-Perot cavity structure is not affected, thereby ensuring the performance stability of the entire sensor under different temperature environments and reducing measurement errors caused by dielectric slurry layer problems.

[0039] In a specific embodiment, the silver electrode layer and the platinum electrode layer are cured by keeping the temperature at 1000°C for 30 minutes. This high-temperature curing process has an important influence on the performance of silver and platinum electrode materials. For the silver electrode layer, high-temperature curing can promote the diffusion and crystallization of silver atoms, improve the compactness and conductivity of the electrode, and reduce the resistance of the electrode, thereby enhancing the transmission efficiency and stability of the thermoelectric signal; for the platinum electrode layer, similarly, high-temperature treatment helps to improve its crystal structure, improve its chemical stability and thermoelectric properties, so that the platinum electrode can more accurately reflect the potential difference caused by temperature changes, thereby improving the sensitivity and accuracy of the sensor to temperature measurement. Appropriate curing temperature and time can form a good interface bond between the silver and platinum electrode layers and other layers, reduce interface resistance and thermal stress, and ensure the stable generation and transmission of thermoelectric effects during temperature changes. This helps the sensor maintain stable thermoelectric performance during long-term use, is not interfered by external environmental factors, improves the reliability and repeatability of the sensor, enables it to accurately measure temperature under various complex temperature conditions, and is suitable for application scenarios with high requirements for temperature measurement accuracy.

[0040] S202: A high-reflection film is plated on the end of the optical fiber to form a reflector of a Fabry-Perot cavity structure.

[0041] In a specific embodiment, a high-reflection film is deposited by vapor deposition, so that the deposited high-reflection film forms a tight bond with the surface of the optical fiber end. During the deposition process, gas-phase atoms or molecules hit the optical fiber surface with high energy, which can penetrate into the surface microstructure and form chemical bonds or physical adsorption with the atoms on the optical fiber surface, ensuring the firm attachment of the reflective film to the optical fiber end. This feature is crucial for the long-term stable operation of the sensor under various environmental conditions. Even when affected by external factors such as vibration and temperature changes, the reflective film is not easy to fall off or be damaged, which ensures the integrity and stability of the Fabry-Perot cavity structure and maintains the performance reliability of the sensor.

[0042] Continue to refer Figure 3 , Figure 3 , shows a flow chart of a temperature measurement method according to an embodiment of the invention, as Figure 3 As shown, the temperature measurement method specifically includes the following steps:

[0043] S301: Monitoring temperature changes by using the resonant wavelength change of the Fabry-Perot cavity structure;

[0044] S302: receiving the light signal reflected by the Fabry-Perot cavity through a photodetector;

[0045] S303: Convert the optical signal into an electrical signal;

[0046] S304: Demodulate the electrical signal through an electronic demodulator to obtain temperature information.

[0047] In a specific embodiment, the temperature change is monitored by using the change of the resonant wavelength of the Fabry-Perot cavity structure. Based on the optical interference principle of the Fabry-Perot cavity, its resonant wavelength has extremely high sensitivity to temperature and can accurately reflect small temperature changes. By monitoring the change of the resonant wavelength, high-precision temperature measurement can be achieved, and the measurement accuracy can reach a high level, meeting the application scenarios with demanding requirements on temperature measurement accuracy, such as high-precision temperature control experiments in scientific research, temperature monitoring of precision machining processes in industrial production, etc. The optical signal reflected by the Fabry-Perot cavity is received by a photoelectric detector, converted into an electrical signal, and then the electrical signal is demodulated by an electronic demodulator to obtain temperature information, thereby realizing a photoelectric integrated temperature measurement process. This photoelectric conversion and demodulation method can quickly and accurately process the optical signal and convert it into directly readable temperature data, with the advantages of fast response speed and strong anti-interference ability. The photoelectric detector can capture the change of the optical signal with high sensitivity, and the electronic demodulator can accurately extract the temperature information from the electrical signal, ensuring the real-time and accuracy of the temperature measurement, and is suitable for occasions requiring fast response and continuous temperature monitoring, such as industrial process automation control, environmental monitoring and other fields.

[0048] The entire temperature measurement method is applicable to a variety of environmental conditions. Whether it is high temperature, low temperature or other complex environments, the sensor can work stably. The characteristics of the Fabry-Perot cavity structure and silver-platinum thermoelectric materials enable the sensor to maintain good performance in extreme environments, and is not easily affected by factors such as electromagnetic interference and chemical corrosion. It can reliably measure temperature changes, providing an effective solution for temperature monitoring in harsh environments, broadening the application range of the sensor, and can be applied to temperature measurement needs in many industries such as aerospace, energy and electricity, and chemical industry.

[0049] The above description is only a preferred embodiment of the present invention and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present invention is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above inventive concept. For example, the above features are replaced with the technical features with similar functions disclosed in the present invention (but not limited to) to form a technical solution.

Claims

1. A silver-platinum thermoelectric temperature sensor for radiative pyrometry, characterized in that It includes an optical fiber, a dielectric slurry transition layer, a silver electrode layer, a dielectric slurry insulation layer, a platinum electrode layer, a dielectric slurry oxide layer and a Fabry-Perot cavity structure which are arranged in sequence from the inside to the outside; The dielectric slurry transition layer is formed by dip-lifting and printing on the surface of the optical fiber, the silver electrode layer is formed by dip-lifting and printing on the surface of the dielectric slurry transition layer, the dielectric slurry insulation layer is formed by dip-lifting and printing on the surface of the silver electrode layer, the platinum electrode layer is formed by dip-lifting and printing on the surface of the dielectric slurry insulation layer, and the dielectric slurry oxidation layer is formed by dip-lifting and printing on the surface of the platinum electrode layer; and the optical fiber, the dielectric slurry transition layer, the silver electrode layer, the dielectric slurry insulation layer, the platinum electrode layer and the dielectric slurry oxidation layer are flush at one end, and the length of the other end decreases layer by layer from the inside to the outside; The Fabry-Perot cavity structure includes a reflector formed at the end of the optical fiber, another reflector formed by coating a high-reflection film at the end of the optical fiber, and a cavity therebetween, and the temperature is measured with high precision by utilizing the resonance characteristics of the Fabry-Perot cavity structure; The dielectric slurry transition layer, the silver electrode layer, the dielectric slurry insulating layer, the platinum electrode layer and the dielectric slurry oxide layer are printed in sequence by the dip-pulling technology. The specific parameter settings include: when the dielectric slurry transition layer is dip-pulled, the descending rate is set to 100 μm / s, the dipping depth is 9 mm, the dipping time is 120 s, and the rising rate is 10 μm / s; when the silver electrode layer is dip-pulled, the descending rate is set to 100 μm / s, the dipping depth is 8 mm, the dipping time is 120 s, and the rising rate is 10 μm / s; when the dielectric slurry insulating layer is dip-pulled, the descending rate is set to 100 μm / s, the dipping depth is 7 mm, The immersion time is 120s, and the rising rate is 10μm / s; the platinum electrode layer is immersed and pulled, and the descending rate is set to 100μm / s, the immersion depth is 6mm, the immersion time is 120s, and the rising rate is 10μm / s; the dielectric slurry oxide layer is immersed and pulled, and the descending rate is set to 100μm / s, the immersion depth is 5mm, the immersion time is 120s, and the rising rate is 10μm / s; the thickness of the dielectric slurry transition layer, the silver electrode layer, the dielectric slurry insulating layer, the platinum electrode layer, and the dielectric slurry oxide layer are all 20μm, the length of the optical fiber is 10mm, and the diameter of the optical fiber is 0.125mm.

2. The silver-platinum thermoelectric temperature sensor for radiation pyrometry according to claim 1, characterized in that The surfaces of the silver electrode layer and the platinum electrode layer are respectively connected to silver wires and platinum wires for signal extraction.

3. A method for preparing a silver-platinum thermoelectric temperature sensor for radiation high temperature measurement as claimed in any one of claims 1 to 2, characterized in that: include: S1: The dielectric slurry transition layer, silver electrode layer, dielectric slurry insulation layer, platinum electrode layer and dielectric slurry oxide layer are printed on the optical fiber in sequence by using the dip-pull technique; S2: coating a high-reflection film at the end of the optical fiber to form a reflector of a Fabry-Perot cavity structure; In the S1, the dielectric slurry transition layer, the silver electrode layer, the dielectric slurry insulating layer, the platinum electrode layer and the dielectric slurry oxide layer are printed in sequence by the dip-pull technique. The specific parameter settings include: when dip-pull the dielectric slurry transition layer, the descending rate is set to 100 μm / s, the dipping depth is 9 mm, the dipping time is 120 s, and the rising rate is 10 μm / s; when dip-pull the silver electrode layer, the descending rate is set to 100 μm / s, the dipping depth is 8 mm, the dipping time is 120 s, and the rising rate is 10 μm / s; when dip-pull the dielectric slurry insulating layer, the descending rate is set to 100 μm / s, the dipping depth is 7 mm, and the dipping time is 120s, rising rate 10μm / s; immersion pulling the platinum electrode layer, set the descending rate 100μm / s, immersion depth 6mm, immersion time 120s, rising rate 10μm / s; immersion pulling the dielectric slurry oxide layer, set the descending rate 100μm / s, immersion depth 5mm, immersion time 120s, rising rate 10μm / s; the dielectric slurry transition layer, the dielectric slurry insulating layer, and the dielectric slurry oxide layer are kept at 800℃ for 30min for curing; the silver electrode layer and the platinum electrode layer are kept at 1000℃ for 30min for curing.

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