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.