Diamond first-order Raman spectrum-based temperature measurement method and temperature measurement device

Abstract

The invention discloses a diamond first-order Raman spectrum-based temperature measurement method, which comprises the following steps of: 1, acquiring first-order Raman spectrum data of a diamond at different temperatures, and recording corresponding temperature values as a data set; step 2, based on the data set obtained in the step 1, fitting through a Voigt fitting function to obtain a full width at half maximum value, a central position and peak intensity of a corresponding Raman peak; step 3, constructing a monotonic function curve group about temperature change through nonlinear fitting; 4, putting the diamond into a temperature field to be measured, and obtaining the full width at half maximum, the central position and the peak intensity of a corresponding Raman peak based on the fitting function in the step 2; and 5, inputting the data measured in the step 4 into a monotonic function curve group, and outputting a final temperature value through analysis and judgment. The invention further provides a temperature measuring device based on the method. According to the method provided by the invention, on the basis of completing temperature detection, the accuracy of a final temperature measurement result is ensured at the same time.

Description

technical field [0001] The invention relates to the technical field of temperature detection, in particular to a temperature measurement method and a temperature measurement device based on diamond first-order Raman spectroscopy. Background technique [0002] Non-contact temperature measurement technology has the characteristics of high temperature measurement limit and no damage to the scene, and is widely used in production and life, scientific research, modern national defense and other fields. Infrared temperature measurement is a common non-contact temperature measurement method. However, this method is greatly affected by the emissivity, reflectivity and ambient atmosphere of the measured surface, which greatly reduces the measurement accuracy. For temperature measurement in harsh environments such as radiation, corrosion, high frequency and high pressure, conventional measurement methods cannot meet the requirements, so it is urgent to develop effective temperature me...

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Problems solved by technology

[0007] In this method, diamond is only used as a temperature carrier and has nothing to do with the final temperature detection, and the change of magnetic field strength is easily affected by the external environment

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