Crack detection method and device, computing equipment and computer readable storage medium

The embodiment of the invention relates to the technical field of artificial intelligence, and relates to a crack detection method and device, computing equipment and a storage medium. According to the specific implementation scheme, the method comprises a receiving step used for receiving an ultrasonic signal through a first ultrasonic transducer, and the ultrasonic signal is transmitted from a second ultrasonic transducer and is transmitted on the outer surface of a detected part; a first processing step used for processing the ultrasonic signal to obtain a fundamental wave amplitude and a second harmonic amplitude of the ultrasonic signal; the second processing step is used for obtaining a relative nonlinear coefficient of the measured part according to the fundamental wave amplitude and the second harmonic amplitude; and the third processing step is used for obtaining the crack size of the outer surface of the measured part according to the relative nonlinear coefficient of the measured part and the fitti