Mitsubishi Heavy Industries Limited

Riken Corporation

Mitsubishi Aircraft Corporation

Syusaku Yamamoto

Tatsufumi Aoi

Yoichiro Tsumura

Naoto Murata

Shinichi Hayashi

Yutaka Miyajima

Masatoshi Tominaga

Yuichiro Kamino

Nobuyuki Kamihara

Hiroaki Minamide

Takehiro Naka

Akio Ikeda

Ko Yatabe

Koji Nawata

Keisuke Kajikawa

An inspection device includes: a light source for outputting pulsed excitation light with a time width of 10 picoseconds to 10 nanoseconds; a nonlinear optical crystal for generating a terahertz wave by optical wavelength conversion of the pulsed excitation light; a polarization part for reflecting at least a part of a reflected wave of the terahertz wave reflected by an inspection target; and a detector for detecting the reflected wave reflected by the polarization part.

Inspection device

A lightning protection system for a wind turbine blade, includes: a receptor disposed in a tip portion of the wind turbine blade; a leading edge protection portion made of a metal and electrically connected to the receptor and disposed so as to cover a leading edge of the wind turbine blade; a down conductor connected to the receptor; at least one connecting conductor for electrically connecting the leading edge protection portion and the down conductor at a position between the receptor and a blade root in a blade spanwise direction of the wind turbine blade; and a first current sensor for measuring a current flowing through a blade tip-side portion which is a portion, of the down conductor, between a blade tip and a connection point with the at least one connecting conductor in the blade spanwise direction.

Lightning protection system for wind turbine blade and wind power generation facility, and monitoring method for wind turbine blade

A wind turbine blade includes: a blade body; a down conductor extending along a longitudinal direction of the blade body; and at least a pair of magnetic field sensors disposed inside the blade body and at opposite positions across the down conductor, a pair of magnetic field sensors being configured to detect a local magnetic field at each of the positions. At least the pair of magnetic field sensors includes: a first sensor disposed on a first axis passing through an installation position of the down conductor in a cross section intersecting the longitudinal direction; and a second sensor disposed on a second axis passing through the installation position and being orthogonal to the first axis in the cross section.

Wind turbine blade, monitoring apparatus for wind turbine blade and wind power generating apparatus, and monitoring method for wind turbine blade

A wind turbine blade includes a blade main body and a leading edge protector. The leading edge protector includes a conductive material and covers a leading edge of the blade main body. The leading edge protector is also electrically connected to a down conductor disposed in a hollow space enclosed by a skin in the blade main body or a conductive mesh member provided along an outer surface of the skin.

Wind turbine blade including leading edge protector and wind turbine including the wind turbine blade

An electric wire protecting device is used in order to be capable of being installed in a narrow wiring area like one in a small aircraft, and to minimize a risk of an electric arc inside electric wire bundles at low costs. To this end, the electric wire protecting device includes: power wire groups each of which is an assembly of one or more power wires at the same potential; a tape for binding the power wire groups at different potentials from one another into one bundle at a constant pitch; and a spacer extending in a direction of extension of the power wire groups, and inserted in boundaries between the power wire groups.

Electric wire protecting device

A mobile communication system includes a mobile station provided in a moving object moving along a predetermined route, and a plurality of base stations provided along the route. The mobile station includes an interruption time determining unit that determines whether an interruption time, in which the base station communicating with the mobile station which is currently connected is interrupted communication with the mobile station, is within a predetermined permissible time range for a travel direction side of the route more forward than a current position of the moving object, and a handover processing unit that performs handover processing when the interruption time determining unit determines that the interruption time is not within the permissible time range.

Mobile communication system, mobile communication method, mobile station, program, and recording medium

A mobile communication system includes a mobile station and base stations, and the mobile station includes a base station selection unit, a first selected base station determination unit, a second selected base station determination unit, an inhibition command data transmission unit that transmits data for commanding inhibition of a downlink to a base station when the first selected base station determination unit determines that the base station is selected at the previous time and is not selected at this time, and a permission command data transmission unit that transmits data for commanding permission of a downlink to a base station when the second selected base station determination unit determines that the base station is not selected at the previous time and is selected at this time.

Growing community of inventors

Tokyo, Japan

Syusaku Yamamoto