Patent ID: 8429973

Claim:
An ultrasonic inspection device, comprising: a plurality of piezoelectric transducing parts constituting an ultrasonic transducer, the plural piezoelectric transducing parts being arranged in a matrix or in a line; a flaw detector configured to perform aperture synthesis processing by adding reflection waveforms of ultrasonic waves which are emitted from the piezoelectric transducing parts and are reflected by an inspection object, to synthesize a three-dimensional image of an inside of the inspection object; and a distance measuring device configured to calculate a distance between the ultrasonic transducer and a surface of the inspection object and an inclination of the ultrasonic transducer with respect to the surface of the inspection object, from a detection signal by a distance measuring ultrasonic sensor, to control the distance and the inclination of the ultrasonic transducer with respect to the inspection object based on calculation results by the distance measuring device, wherein at least part of ultrasonic wave transmission/reception by the distance measuring ultrasonic sensor is performed during execution of the aperture synthesis processing during which ultrasonic wave transmission/reception by the ultrasonic transducer is not performed.