Hitachi, Ltd.

Hitachi-ge Nuclear Energy, Ltd.

Hitachi Engineering Services Co., Ltd.

Mitsubishi Hitachi Power Systems, Ltd.

Mitsuru Odakura

Kazuhiro Suzuki

Yutaka Suzuki

Tetsuya Matsui

Satoshi Okada

Masahiro Koike

Kojirou Kodaira

Kenji Kumasaka

Katsumi Isaka

Kenji Tayama

Yuuji Adachi

Masahiro Miki

Yoshiaki Nagashima

Masao Endou

Kojiro Kodaira

Ryosuke Kobayashi

Masahiro Tooma

Yosuke Takatori

Yutaka Kometani

A nondestructive inspection apparatus includes a pair of guided wave sensors disposed on an outer surface of a piping and a guided wave inspection device connected to the pair of guided wave sensors which, outputs a transmitting signal for propagating a guided wave to the guided wave sensors, and obtains a receiving signal by receiving a propagated signal by the guided wave sensors. An inspection-result storage device stores the guided wave as a digitized signal of the received wave and an inspection-result diagnostic device performs arithmetic processing of judging whether or not a signal associated with a defect exists.

Nondestructive inspection apparatus and nondestructive inspection method using guided wave

The position detection system includes a pressure sensor that detects the vertical position of an underwater vehicle, a range sensor unit that detects the relative distances of the underwater vehicle from its surrounding structures; a measurement image acquisition unit that acquires a measurement image of the horizontal plane, an image storage unit that stores images, an image selector that selects one of the stored images that corresponds to the horizontal plane in which the relative distances have been detected, a corresponding-area identification unit that identifies the area in the selected image that corresponds to the measurement image by performing map matching, and a horizontal position calculator that identifies, the pixel that corresponds to the position at which the relative distances have been detected and calculates the horizontal position of the underwater vehicle.

System and method for detecting position of underwater vehicle

Disclosed herein are an apparatus and a technique for quickly detecting a defective portion including wastage, which has occurred in piping having a straight piping portion or a bending zone, in the nondestructive inspection using a guided wave. A guided wave sensorincluded in a guided wave inspection deviceis mounted to the outer surface of piping. A guided wave is propagated to an inspection area of the piping. If a defective portion exists, the guided wave sensorreceives the guided wave that has been reflected from the defective portion. As a result, the guided wave inspection devicecan acquire receive information including receive information derived from the defect.

An eddy current testing method for a turbine rotor including a disc, a plurality of turbine blades disposed along the periphery of the disc, and a plurality of pins for joining a blade fork portion formed on each of the plurality of turbine blades to a disc fork portion formed on the disc, the method including inserting a probe having an eddy current testing sensor into a hole formed through the disc fork portion and the blade fork portion by pulling out one of the plurality of pins in a state that the blade fork portion is still inserted into the disc fork portion; and performing eddy current testing for at least part of an internal surface of the hole by using the probe.

Eddy current testing apparatus and eddy current testing method

An ultrasonic testing apparatus for a turbine fork of a turbine blade joined to a turbine disc, comprising:

Ultrasonic testing apparatus for turbine forks and method thereof

The eddy current testing apparatus includes a probe having an eddy current testing sensor including a pair of eddy current testing coils. The apparatus also includes an eddy current testing flaw detector inputting detection signals from the eddy current testing sensor. The diameter of a magnetic core used in each of the pair of eddy current testing coils is within the range of 0.1 mm to 0.5 mm.

Eddy current testing method

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Hitachi, Japan

Mitsuru Odakura