Sound velocity calculation device, sound speed calculation method, and sound speed calculation program

摘要

The first vibration detection unit 110 /b A detects a first vibration W b 10 propagating through a structure (a pipe 900 or the like). The second vibration detection unit 110 /b B detects the second vibration W b 20 propagating through the structure. The rise time difference calculation unit 121 calculates a rise time difference t which is a time difference between a first rise time ta at which the first oscillation W 10 rises and a second rise time tb at which the second oscillation W 20 rises. The correlation function calculation unit 122 calculates a correlation function between the first vibration W 10 and the second vibration W 20. The sound velocity calculation unit 123 calculates the sound velocity c of the structure based on the correlation function, the rise time difference t, and the distance D between the first vibration detection unit 110 A and the second vibration detection unit 110 B. As a result, it is possible to more accurately calculate the sound velocity of a structure (piping 900 or the like).