Mitsubishi Heavy Industries Limited

Mitsubishi Heavy Industries Compressor Corporation

Mikiyasu Urata

Kiyotaka Aoki

Atsushi Nakajima

Yoshikazu Yamada

Seiichi Kawanami

Shinichi Tsuji

Daisuke Takemura

Masaaki Torichigai

A method includes: an arrangement step of arranging a phased array probe including a plurality of oscillators each of which is capable of emitting ultrasonic waves on an end surface of the rotor disc, in a parallel state in which the plurality of oscillators are arranged along a circumferential direction of the rotor disc; a first transmission step of emitting ultrasonic waves from the plurality of oscillators in the parallel state, while a timing of emitting the ultrasonic waves from each of the oscillators is controlled in a first emission pattern, and receiving reflection waves of the ultrasonic waves; and a second transmission step of emitting ultrasonic waves from the plurality of oscillators in the parallel state, while the timing of emitting the ultrasonic waves from each of the oscillators is controlled in a second emission pattern different from the first emission pattern, and receiving reflection waves of the ultrasonic waves.

Ultrasonic flaw-detection method and apparatus for blade groove in turbine rotor disc

An ultrasound flaw detection device which detects abnormalities within a tube while moving in the tube by pressure of water flow. The ultrasound flaw detector includes an ultrasound probe () which emits an ultrasound wave from an inside of the tube to a tube wall and receives an echo signal, a pulser-receiver () which transmits a pulse signal to the ultrasound probe and to which the received echo signal is inputted, a memory unit () which stores the received echo signal, a control unit () which controls transmitting timing of the pulse signal from the pulser-receiver to the ultrasound probe and controls writing of the received echo signal to the memory unit, and a power supply unit (); a flexible member () which connects the plurality of parts of the ultrasound flaw detector; and a centering member () which keeps the ultrasound probe approximately centered within the tube.

Immersion-type ultrasound flaw detection device and ultrasound flaw detection system

Growing community of inventors

Tokyo, Japan

Mikiyasu Urata