Temperature sensor and system based on optical fiber structure

Abstract

The invention relates to a temperature sensor and a temperature sensing system based on an optical fiber structure, and particularly relates to the field of temperature detection devices. The temperature sensor based on the optical fiber structure comprises an optical fiber, a first metal layer, a thermal expansion layer and a second metal layer, wherein the first metal layer and the second metallayer are arranged in the optical fiber; the first metal layer, the second metal layer and the inner wall of the optical fiber form a cavity; the cavity is provided with the thermal expansion layer; and two ends of the optical fiber are respectively an incident port and an emergent port of light. When the temperature sensor is used for measuring temperature, the size of the thermal expansion layeris expanded by the temperature, the thermal expansion layer extrudes the cavity so that two sides of the cavity are inclined, namely, the first metal layer and the second metal layer are inclined, the transmission spectrum of emergent light can be changed due to cavity deformation when light penetrates through the first metal layer and the second metal layer, and the temperature change can be measured according to the change of the transmission spectrum of the structure.

Description

technical field [0001] The invention relates to the field of temperature detection devices, in particular to a temperature sensor and system based on an optical fiber structure. Background technique [0002] Temperature is a physical quantity that characterizes the degree of hot or cold of an object, and it is an important influencing parameter in both daily life and industrial and agricultural production. The temperature monitoring plays a very important role in improving product quality, production efficiency, energy saving and production safety. Therefore, the generation of temperature sensors can effectively help people realize the measurement of temperature. The temperature sensor is the earliest developed and most widely used type of sensor. The temperature sensor is indirectly measured by changing a certain characteristic of an object as the temperature changes. The characteristics of many materials and components change with the change of temperature, so there are ...

AI Technical Summary

Problems solved by technology

At present, the mainstream optical fiber sensors mainly include distributed optical fiber temperature sensors and optical fiber fluorescence temperature sensors. Although the measurement accuracy has been improved, the structure and manufacturing process of most temperature sensors are still relatively complicated. Therefore, it is necessary to study a high-precision optical fiber sensor. And the temperature sensor with simple structure appears

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