DIAGNOSIS METHOD OF STRUCTURE AND DIANOSIS SYSTEM

摘要

In a method for diagnosing a structure, a sensing unit receives an ultrasonic signal generated from a target structure by a laser beam. A control unit calculates a number of total peak points in an ultrasonic frequency spectrum generated based on the ultrasonic signal, and calculates a number of threshold peak points which are larger than or equal to a threshold value among the number of total peak points. The control unit determines whether the target structure is damaged based on the number of total peak points and the number of threshold peak points. The method for diagnosing a structure according to embodiments of the present invention uses the number of total peak points and the number of threshold peak points in the frequency spectrum of the ultrasonic signal generated from the target structure to determine whether the target structure is damaged to increase accuracy of structure diagnosis.