Apparatus for detecting the local temperature variations of an object and the sites of the temperature variations.

摘要

An apparatus for detecting the local temperature variations of an object and the sites of the temperature variations comprises, at least one temperature-sensing element (46) formed of a band-shaped magnetic material (48) having a prescribed Curie temperature; a pulse generator (40) for supplying a pulse signal to at least one end of the temperature-sensing element (46); a pulse time difference detector (42) for detecting a difference between a point of time at which the pulse signal is received and a point of time at which the reflected pulse signal of the pulse signal from the site of the temperature-sensing element (46) where its characteristic impedance has changed is received; and a temperature variation site detector fro determining a site of temperature variation from the detected pulse time difference.