Manufacturing method and temperature detection method for PbSe quantum dot liquid-core optical fiber temperature sensor

Abstract

The invention discloses a manufacturing method and a temperature detection method for a PbSe quantum dot liquid-core optical fiber temperature sensor. The manufacturing method includes the five steps of selecting colloid PbSe quantum dots in various sizes, preparing a colloid PbSe quantum dot solution, injecting the colloid PbSe quantum dot temperature-sensitive fluorescent material solution and a trichloro ethylene solution into hollow optical fibers of the same type respectively to conduct packaging, completing manufacturing of a colloid PbSe quantum dot liquid-core optical fiber sensitive element, and establishing the PbSe quantum dot liquid-core optical fiber temperature sensor. The temperature detection method includes the three steps of manufacturing the colloid PbSe liquid-core optical fiber temperature sensor, calibrating the colloid PbSe quantum dot liquid-core optical fiber temperature sensor, and conducting multi-point temperature detection through the colloid PbSe quantum dot liquid-core optical fiber temperature sensor. By means of a designed device, multi-point temperature detection can be achieved, the adopted fluorescent material is low in cost, long in service life and high in quantum yield, and the designed temperature sensor is low in manufacturing cost, simple in structure and high in stability.

Description

technical field [0001] The invention relates to the fields of temperature detection and optical fiber temperature sensors, and relates to a method for structural design, manufacture and multi-point temperature detection of a colloidal PbSe quantum dot liquid core optical fiber temperature sensor. Background technique [0002] With the rise of fiber optic temperature measurement technology, fiber optic temperature sensors have been widely researched and applied. Optical fiber has the advantages of no charge, small size, light weight, easy bending, and good radiation resistance. At the same time, as a transmission material, it has the advantages of wide operating frequency and large dynamic range. Compared with traditional temperature sensors, optical fiber temperature sensors have many advantages: light waves do not generate electromagnetic interference, are easily received by various detection devices, can perform photoelectric or electro-optical conversion, and are easy to...

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Problems solved by technology

[0005] In order to overcome the shortcomings of the optical fiber fluorescent temperature sensor, such as the life of the fluorescent material being affected by environmental factors, high cost, low quantum yield, narrow wavelength range, etc., the present invention provides a method for manufacturing and temperature detection of a PbSe quantum dot liquid core optical fiber temperature sensor, This method uses colloidal PbSe quantum dots as the temperature-sensitive fluorescent material in the optical fiber, and utilizes its size, temperature-dependent photoluminescence properties and the one-to-one correspondence between the emission spectrum intensity and temperature of colloidal PbSe quantum dots of a specific size, and adopts a series of processes Method, making a temperature sensitive element based on colloidal PbSe quantum dot liquid core optical fiber, and constructing a colloidal PbSe quantum dot liquid core optical fiber temperature sensor

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