Temperature sensor based on microstructure fibers, manufacturing method of temperature sensor, and temperature measuring device

Abstract

The invention belongs to the technical field of temperature sensors and provides a temperature sensor based on microstructure fibers, the manufacturing method of the temperature sensor, and a temperature measuring device. The temperature sensor comprises at least two microstructure fibers, wherein every two adjacent microstructure fibers are connected in series through a multimode fiber. For a fiber core and a cladding of each microstructure fiber, air holes distributed in the axial direction are formed in the cladding at least. Quantum dot materials are arranged in the air holes. The wavelength of fluorescent light emitted by the quantum dot materials in a microstructure fiber is different from the wavelength of fluorescent light emitted by the quantum dot materials in another microstructure fiber. Compared with ordinary fluorescent materials, the quantum dots have the advantages of being large in excitation wavelength, adjustable in fluorescent wavelength, stable in fluorescent intensity and the like. By adding quantum dots in different types and sizes into the microstructure fibers, the microstructure fibers can be distinguished in a wavelength domain according to the fluorescent wavelengths, and quasi-distributed sensing is realized.

Description

technical field [0001] The invention belongs to the technical field of temperature sensors, and in particular relates to a temperature sensor based on a microstructure optical fiber, a preparation method thereof, and a temperature measuring device. Background technique [0002] Fluorescence parameters of fluorescent materials are related to temperature, such as fluorescence intensity, intensity ratio, wavelength and lifetime are functions related to temperature, so temperature can be measured by monitoring related fluorescence parameters. However, the fluorescent wavelength range of ordinary fluorescent materials is wide and the adjustable range is narrow, which limits the application of optical fiber sensors based on ordinary fluorescent materials in distributed sensing, and the fluorescence intensity of ordinary fluorescent materials is weak, especially when the excitation light is irradiated for a long time. Under these circumstances, the fluorescent material will produce...

AI Technical Summary

Problems solved by technology

However, the fluorescent wavelength range of ordinary fluorescent materials is wide and the adjustable range is narrow, which limits the application of optical fiber sensors based on ordinary fluorescent materials in distributed sensing, and the fluorescence intensity of ordinary fluorescent materials is weak, especially when the excitation light is irradiated for a long time. Under this condition, the fluorescent material will produce photobleaching phenomenon, resulting in a significant decrease in fluorescence intensity, reducing the sensitivity of the sensor

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