Hitachi-ge Nuclear Energy, Ltd.

Hitachi, Ltd.

Mitsubishi Hitachi Power Systems, Ltd.

Naoyuki Kono

Atsushi Baba

So Kitazawa

Yoshio Nonaka

Masahiro Miki

Motoyuki Nakamura

Tetsuya Matsui

Masahiro Koike

Yoshinori Musha

Masahiro Tooma

Hirohisa Mizota

Satoshi Shinohara

Isao Yoshida

Kenichi Otani

Masafumi Imai

Satoshi Okada

Hiroyuki Nakano

Hiroshi Kitaguchi

Yuji Matsui

Akira Nishimizu

Kouichi Kurosawa

Kouichi Ushiroda

Katsuhiko Hirano

Hisashi Endo

Ryosuke Kobayashi

Hayato Mori

Yosuke Takatori

Shinobu Okido

Sou Kitazawa

Hirofumi Ouchi

Kazuya Ehara

Makoto Senoo

Toshimi Kimura

Hirokazu Adachi

Takao Shimura

Naoya Fukutsuka

Taiichiro Yamada

Yuki Oshima

Chihiro Matsuoka

Yuki Ohshima

An ultrasonic transmission probe is arranged such that an ultrasonic wave transmitted from the ultrasonic transmission probe toward a pipe propagates in a thick part of the pipe, is at least reflected on the outer peripheral face of the pipe, and travels toward an inspection site on the pipe, and an ultrasonic reception probe is arranged to be symmetrical to the ultrasonic transmission probe with reference to the xz plane including the inspection site and perpendicular to the center axis of the pipe.

Piping inspection apparatus

Chirp waves generated in a transmitting/receiving unit is supplied to ultrasonic sensors. Signals output from the ultrasonic sensors are supplied to the transmitting/receiving unit and summed in a signal processing/recording unit. The signal processing/recording unit performs mutual correlation processing between the summed signals and the chirp waves and calculates a peak generation time difference. Necessity of exchanging a pipe is determined by calculating and recording the thickness of a pipe from the calculated time difference and calculating a difference between thicknesses measured in the past and the present.

Ultrasonic thickness reduction inspection method/apparatus

A single-element ultrasonic sensor includes a single transducer element and transmits an ultrasonic wave on the basis of a pulse wave. An ultrasonic array sensor includes a plurality of transducer elements and receives an ultrasonic reflected wave. A pulsar supplies the pulse wave to the single element ultrasonic sensor. A receiver receives electric signals from the transducer elements included in the ultrasonic array sensor. An amplification and conversion unit amplifies the electric signals received from the transducer elements included in the ultrasonic array sensor, converts the electric signals into digital signals, and arranges the digital signals in a serial order so as to generate a serial digital signal. An image generator generates an image on the basis of the serial digital signal.

Ultrasonic observation equipment, ultrasonic observation system, and ultrasonic observation method

The invention is directed to an ultrasonic inspection method, an ultrasonic test method, and an ultrasonic inspection apparatus that enable sizing to be executed even for a minute defect using an ultrasonic wave. A holder holds a transmitting probe for executing an angle beam method and a receiving probe for executing a vertical beam method. A motor and a guide rail form a movement mechanism for the transmitting probe and the receiving probe. In an ultrasonic test mode, the transmitting probe executes the angle beam method and transmits and receives an ultrasonic wave. In a sizing mode, the transmitting probe transmits an ultrasonic wave and the receiving probe receives this wave. A tip echo of a wave diffracted from a tip of a defect on a sample and a corner echo reflected from a corner of the defect are measured from a waveform received by the receiving probe.

Ultrasonic inspection method, ultrasonic test method and ultrasonic inspection apparatus

A system for attitude control of an underwater vehicleof the present invention includes an underwater vehiclewith a thruster, an assist devicethat is coupled to the underwater vehiclewith a cableand has cable handling equipmentand a thruster, a cable attachment-to-attachment distance detection unitthat detects distance between a cable attachment of the underwater vehicleand a cable dispenser of the assist device, and a control unitthat previously stores the relationship between the attachment-to-attachment distance and cable length including a predetermined amount of slack and determines the amount of cable to be wound up or let out based on the cable length associated with the detected attachment-to-attachment distance.

System for attitude control of underwater vehicle and method for attitude control of underwater vehicle

An eddy current flaw detection system includes an eddy current flaw detection probe having a substrate facing an inspection surface, and at least one exciting coil and at least two detecting coils provided on the substrate, a scanning device which scans the probe on the inspection surface, a scan control device which drives and controls the scanning device, an eddy current flaw detection device which acquires results of detection of a plurality of detection points corresponding to combinations of the exciting and detecting coils for each scan position of the probe, and a data processing/display device which processes data from the scan control device and the eddy current flaw detection device and thereby displays a result of flaw detection. The data processing/display device acquires three-dimensional coordinates of the detection points for each scan position of the probe and thereby creates three-dimensional flaw detection data.

Eddy current flaw detection system and eddy current flaw detection method

An ultrasonic inspection method and an ultrasonic inspection device allow three-dimensional inspection data and three-dimensional shape data to be appropriately positioned on a display screen and allow a defect echo and a shape echo to be quickly identified even when information on the relative positions of a probe and an object to be inspected is not provided. The ultrasonic inspection data that is generated from the waveforms of ultrasonic waves received by an ultrasonic probe is compared with a plurality of ultrasonic propagation data pieces calculated by a ray tracing method on the basis of the three-dimensional shape data on an object to be inspected. The position of the three-dimensional inspection data or the three-dimensional shape data is moved relative to the other data position on the basis of the comparison results, thereby displaying the three-dimensional inspection data and the three-dimensional shape data while overlapping each other.

Ultrasonic inspection method and ultrasonic inspection device

An ultrasonic testing method is provided to measure a thickness of an object in a simple and highly accurate manner when crystal grains that form a metal solidification structure of a directionally-solidified material cast or the like have a statistical variation. An ultrasonic probecauses a longitudinal ultrasonic wave to be incident on a test objectin a direction perpendicular to a surfaceA of the test object. As a velocity of the longitudinal ultrasonic wave, the average of velocities of longitudinal ultrasonic waves propagating in directions of crystal orientations &#x3c;100&#x3e;, &#x3c;110&#x3e;, and &#x3c;210&#x3e; is used. The thickness of the test objectis measured on the basis of the velocity of the ultrasonic wave and a time period for the propagation of the ultrasonic wave.

Ultrasonic testing method

An apparatus and a method for ultrasonic testing obtains high-resolution and high-S/N ratio testing results by driving a number of piezoelectric elements using fewer pulsers and receivers in comparison with the number of elements composing an array transducer. A sensor information setter sets a plurality of piezoelectric element groups used for transmission and a plurality of piezoelectric element groups used for reception among the plurality of piezoelectric elements composing an ultrasonic array transducer. A computer transmits an ultrasonic wave from the element cluster set for transmission, and stores an ultrasonic wave received by the element cluster set for reception. The procedure is repeated including different element cluster sets for transmission and reception to obtain first receive signals. The first receive signals are summed to obtain a second receive signal; and the second receive signal is displayed with reference to the sensor center position on a display unit.

Apparatus and method for ultrasonic testing

An ultrasonic inspection device allows position adjustment of three-dimensional inspection data and shape data to be easily performed on a display screen and allows a defect echo and a shape echo to be quickly identified. A calculator generates the three-dimensional inspection data from waveforms stored in a data storage unit. A three-dimensional display unit displays the three-dimensional inspection data generated by the calculator and the three-dimensional shape data on an object to be inspected. The calculator corrects the relative displayed positions of the three-dimensional inspection data and the three-dimensional shape data on the basis of a coordinate system defined by points and a surface that constitute a part of the three-dimensional shape data displayed by the three-dimensional display unit, and causes the three-dimensional display unit to display the three-dimensional inspection data and the three-dimensional shape data while the three-dimensional inspection data and the three-dimensional shape data overlap each other.

Ultrasonic inspection device and ultrasonic inspection method

Ultrasonic inspection equipment facilitates alignment of display positions of three-dimensional ultrasonic inspection data and three-dimensional shape data, and quickly discriminates between a defect echo and an inner-wall echo. A computerA has a position correction function of correcting a relative display position between three-dimensional shape data and three-dimensional ultrasonic inspection data. A display position of the three-dimensional ultrasonic inspection data or that of the three-dimensional shape data is moved by a norm of a mean vector along the mean vector that is calculated from a plurality of vectors defined by a plurality of points selected in the three-dimensional ultrasonic inspection data and by a plurality of points selected in the three-dimensional shape data. The three-dimensional shape data and the three-dimensional ultrasonic inspection data are displayed in such a manner as to be superimposed on each other on a three-dimensional display unitC.

Ultrasonic inspection equipment and ultrasonic inspection method

An ultrasonic measurement method and an ultrasonic measurement apparatus are capable of performing an inspection for a short time with a high SN ratio and a small variation An ultrasonic measurement method and an ultrasonic measurement apparatus are capable of performing an inspection for a short time with a high SN ratio and a small variation in sensitivity in a process for detecting a defect in all directions at 360 degrees using a matrix array sensor without performing mechanical scanning in all directions, while reducing noise that is caused by a bottom surface echo. An element selecting circuit selects a group of a plurality of ultrasonic transducer elements for transmission from among ultrasonic transducer elements that constitute a two-dimensional array sensor so that the ultrasonic transducer elements for selected for transmission are arranged in line symmetry with respect to a first line symmetric axis to set the group selected for transmission. The element selecting circuit selects a group of a plurality of ultrasonic transducer elements for reception so that the ultrasonic transducer elements selected for reception are arranged in line symmetry with respect to a second line symmetric axis that is perpendicular to the first line symmetric axis to set the group selected for reception. A transmitting element selector selects, as transmitting elements, the ultrasonic transducer elements set by the element selecting circuit. A receiving element selector selects, as receiving elements, the ultrasonic transducer elements set by the element selecting circuit.

Ultrasonic measurement method, ultrasonic measurement apparatus, and ultrasonic sensor

An object of the present invention is to provide an inspection apparatus for inspecting weld zones in a reactor pressure vessel, the inspection apparatus comprising: an ultrasonic probefor emitting an ultrasonic wave; a probe holding unitfor holding the ultrasonic probesuch that a ultrasonic wave transmitting surface of the ultrasonic probeis kept in direct contact with or at a constant distance from the outer surface of the reactor pressure vessel; a pressing unitfor pressing the probe holding unitparallel to a central axis of a control rod drive housingagainst the reactor pressure vessel; and a rotatorfor rotating the probe holding unitand the pressing unitabout the central axis of the control rod drive housing

Apparatus for ultrasonic inspection of reactor pressure vessel

In an ultrasonic inspection method or ultrasonic inspection system in which an ultrasonic wave is propagated to an test object via a medium such as a liquid or a gas, an incident position of the ultrasonic wave is accurately and reliably identified. In an ultrasonic inspection method based on an immersion technique, an optical irradiator is mounted on an ultrasonic wave transmitting/receiving unit, an optical marker is irradiated from the optical irradiator to the test object, and an irradiated position of the optical marker is imaged using imaging equipment in order to perform inspection.

Ultrasonic inspection system and ultrasonic inspection method

Growing community of inventors

Mito, Japan

Naoyuki Kono