Kabushiki Kaisha Toshiba

Akira Tsuyuki

Satoshi Okada

Masahiro Yoshida

Satoshi Yamamoto

Takahiro Miura

Makoto Ochiai

Hidehiko Kuroda

Masaki Yoda

Mitsuaki Shimamura

Tatsuyuki Maekawa

Itaru Chida

Yoshiaki Ono

Kentaro Tsuchihashi

Fukashi Osakata

Akio Sumita

Toru Onodera

Tetsuro Aikawa

Shunichiro Makino

Ryoichi Saeki

A surface inspecting method including irradiating a laser light to a test object to generate an ultrasonic wave, irradiating a second laser light at a position apart by a known distance from a position where the laser light is irradiated and receiving a reflection light thereof, and correcting a generation surface wave of a received ultrasonic wave by using an ultrasonic wave other than the generation surface wave to thereby detect a flaw of the test object. A characterization of the generation surface wave is divided or integrated by the same characterization of the ultrasonic wave other than the generation surface wave included in an output signal to obtain a performance index value and obtain a depth of the flaw by applying the performance index value to a calibration curve in which a corresponding relation between the performance index value and the depth of the flaw is obtained preliminarily.

Laser-based maintenance apparatus for inspecting flaws based on a generated surface wave

A laser maintenance apparatus including a laser system which includes an optical system for emitting, in a first irradiation condition, a generation laser beam for generating an ultrasonic wave in a portion of an object on which maintenance is to be performed, and including a laser source configured to generate and detect a detection laser beam which interacts with the ultrasonic wave generated by the laser light beam in the first condition. The laser maintenance apparatus also includes a light transmitting device for transmitting laser light emitted from the laser system, a laser irradiation device for irradiating laser light transmitted by the light transmitting device to the object portion, and a transporting/scanning mechanism for transporting the light transmitting device and the laser irradiation device to a portion near the object portion, and scanning over an arbitrary range at the object portion.

Laser ultrasonic detection device including a laser oscillating device which includes a seed laser oscillating element

A surface inspecting method for inspecting a flaw of a test object using a surface wave and estimating a depth of the flaw of the test object from an attenuation ratio of a frequency of a generation wave, the surface inspecting method including calculating a power spectrum of generation wave generating the flaw of the test object; integrating the power spectrum of the generation wave passing the flaw of the test object and calculating an integration value thereof; converting the integration value into a flaw depth based on a calibration created beforehand and calculating the flaw depth of the test object; and displaying the calculated flaw depth of the test object.

Laser-based maintenance apparatus for inspecting flaws

A radiation detector for detecting radiation comprises a scintillator, a first light guide, a plurality of second light guides and a photo detector. The scintillator generates a scintillated light in response to received radiation. The first light guide, which is connected to the scintillator, has a fluorescence characteristic. The second light guide has a common surface arranged at the opposite side of the surface of the scintillator where radiation is received, and the second light guide has a fluorescence characteristic. The photo detector is connected to the first light guide and the second light guide, and detects a fluorescent light therein.

Radiation detector

Growing community of inventors

Yokohama, Japan

Akira Tsuyuki