Temperature sensor, temperature measuring method and device

Abstract

The invention discloses a temperature sensor, a temperature measuring method and a device, and belongs to the technical field of measurement. A nonlinear optical crystal is used as a temperature sensor, light frequency conversion of quasi-phase matching is performed by the aid of the nonlinear optical crystal at a temperature to be measured, the quasi-phase matching period lambda (T) of the nonlinear optical crystal at the temperature to be measured is obtained, the temperature T to be measured is calculated according to the formula lambda (T) =lambda (T0) [1+alpha*(T-T0) +beta*(T-T0)2], wherein the lambda (T0) refers to the quasi-phase matching period of the nonlinear optical crystal at the reference temperature T0, and the alpha and the beta refer to the thermal expansion coefficient of the nonlinear optical crystal. The temperature is measured by the aid of the relationship between the quasi-phase matching period and environmental temperature of the nonlinear optical crystal, the measuring range is greatly improved, and a new direction is indicated by temperature measuring technology.

Description

technical field [0001] The invention relates to a temperature sensor, a temperature measurement method and a device, and belongs to the technical field of measurement. Background technique [0002] Temperature is an important state parameter of matter. Its measurement and control are of great significance to people's daily life, industrial production, scientific research and other fields. Therefore, temperature sensors have always been widely concerned. After continuous research and market development, the performance of temperature sensors in terms of measurement range and measurement accuracy has been continuously improved, and its application has also expanded from the field of life and general industrial production to the measurement environment of metallurgy, materials, aerospace and weapon testing. Complex special application areas. [0003] At present, although there are many types of temperature sensors, the commonly used temperature measurement methods have certain...

AI Technical Summary

Problems solved by technology

[0003] At present, although there are many types of temperature sensors, the commonly used temperature measurement methods have certain limitations, and cannot be well adapted to the temperature measurement needs of large ranges and harsh environments.

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