| 摘要 |
PROBLEM TO BE SOLVED: To provide a temperature measuring method in which a temperature on the inner surface of a structure is measured without installing a temperature measuring apparatus or the like at the inside of the structure, and which measures the temperature on the inner surface of the structure in an arbitrary position, and to provide the temperature measuring apparatus. SOLUTION: The temperature on the inner surface of the structure is measured, ultrasonic waves are transmitted toward the inner surface of the structure by an ultrasonic transmitting-receiving element installed on the outer surface of the structure, and the ultrasonic waves reflected by the inner surface of the structure are received by the transmitting-receiving element. Further, a sound velocity passing the inside of a wall of the structure is calculated on the basis of the propagation time of the ultrasonic waves, a temperature in the central part of the wall of the structure is found on the basis of a relationship between the sound velocity and the temperature, and the temperature on the inner surface of the structure is found on the basis of the temperature in the central part and on the basis of the temperature on the outer surface of the structure. COPYRIGHT: (C)2004,JPO
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