Temperature measurement device, temperature measurement method, and computer-readable non-transitory medium

A temperature measurement method characterized by comprising:

• with a detector, detecting a first Stokes component and a first anti-Stokes component from a back scattering light generated when a light is input into a first end of an optical fiber and detecting a second Stokes component and a second anti-Stokes component from a back scattering light generated when a light is input into a second end of the optical fiber;
• within a predetermined region including a sample point of a partial region on the first end side of the optical fiber, replacing the second anti-Stokes component with a value according to the first Stokes component, the first anti-Stokes component and the second Stokes component when any one of correlations of the second anti-Stokes component to the first Stokes component and the first anti-Stokes component is less than or equal to a threshold value;
• and
• measuring a temperature at the sample point by using the first Stokes component, the first anti-Stokes component, the second Stokes component, and the second anti-Stokes component that is replaced by the replacing.

A computer-readable, non-transitory medium storing a program that causes a computer to execute a process, the process comprising:

• detecting a first Stokes component and a first anti-Stokes component from a back scattering light generated when a light is input into a first end of an optical fiber and detecting a second Stokes component and a second anti-Stokes component from a back scattering light generated when a light is input into a second end of the optical fiber;
• within a predetermined region including a sample point of a partial region on the first end side of the optical fiber, replacing the second anti-Stokes component with a value according to the first Stokes component, the first anti-Stokes component and the second Stokes component when any one of correlations of the second anti-Stokes component to the first Stokes component and the first anti-Stokes component is less than or equal to a threshold value;
• and
• measuring a temperature at the sample point by using the first Stokes component, the first anti-Stokes component, the second Stokes component, and the second anti-Stokes component that is replaced by the replacing.