Mitsubishi Heavy Industries Limited

Nobuhiro Higuchi

Nozomi Saito

Takashi Yari

Misaki Fukuyama

Natsuse Morimoto

A defect detection method includes: a step of irradiating an object with a pulsed laser beam to continuously generate ultrasonic waves in the object; and a step of detecting the presence or absence of an internal defect of the object on the basis of the presence or absence of resonance of the ultrasonic waves occurring between a surface of the object and the internal defect. In this method, the internal defect is detected on the basis of the presence or absence of resonance of the ultrasonic waves occurring between the surface of the object and the internal defect. The internal defect can be thus detected even when the internal defect is in a surface layer of the object. The detected internal defect is crack or void.

Defect detection method, defect detection device, and additive manufacturing device

The present invention comprises: a fatigue estimation unit that estimates the fatigue life of a prescribed area of a fuselage, on the basis of the level of damage in the prescribed area during operation; a determination unit that determines whether the estimated fatigue life will be reached after a prescribed period of time has elapsed; a repair determination unit that determines that repair of the fuselage is unnecessary if a determination is made that the estimated fatigue life will be reached after the prescribed period of time has elapsed, and that determines that the fuselage is to be repaired if a determination is made that the estimated fatigue life will be reached within the prescribed period of time; and a selection unit that, if a determination is made that the fuselage is to be repaired, selects a repair method corresponding to the detected degree of damage in the prescribed area.

Aircraft management device, method, and program

To provide a repairing member, a repair structure, and a damage detection method that enable accurate detection of damage that occurs in a repairing member and a repairing target member. The repair structure includes a skin in which an opening is formed, and a plate-like repairing member fixed to the skin to cover the opening. The repairing member has a recess formed on a contact face side in contact with the skin, and an ultrasonic search unit is placed inside the recess. The ultrasonic search unit is placed so as to be in contact with both the repairing member and the skin.

Growing community of inventors

Tokyo, Japan

Nobuhiro Higuchi