Kawasaki Jukogyo Kabushiki Kaisha

Central Motor Wheel Co., Ltd.

East Japan Railway Company

Tadao Shimada

Masayuki Enomoto

Hiroyuki Matsuda

Masayuki Mitsue

Yukimitsu Suzuki

Kazuhiko Onoue

Hirotaka Uehara

Yohichi Nakamura

Ichiro Arita

Sadao Kubo

Keita Kataoka

Masanobu Kozeki

Hirotaka Kinoshita

A range image obtaining system for a track includes a laser slit light source disposed within a plane perpendicular to a tread of a rail and emits laser slit light within the plane; a two-dimensional image imaging device which is disposed to have an angle with respect to the plane perpendicular to the tread of the rail and obtains a light sectioning image generated from the laser slit light; and an image signal processing device for generating a range image based on a distance from the two-dimensional image imaging device based on the light sectioning image.

Distance image obtaining system for track

A displacement detecting apparatus is provided with a self-position detector for detecting a position and an orientation of the apparatus relative to a preset reference position and a preset reference orientation. Displacement of a rail at an upper surface reference point and a side surface reference point relative to a preset reference position is calculated from imaged image data of the surfaces of the rail using an optical cutting method, and the calculated displacement of the rail is corrected using data obtained from the self-position detector, thereby compensating for errors caused by differences in position and orientation of the apparatus associated with a vehicle running motion. By doing so, the displacement detecting apparatus is superior in maintenance and unlikely to cause measurement errors.

Displacement detecting apparatus for railroad rails

A method of measuring a welding-groove position for an over-lapped fillet welding of thin members, comprising a projection step of projecting a slit light so that the slit light is projected on both the thin members crossing a welding-groove face, a two-dimensional image acquisition step of capturing the slit-light image projected on each of the thin members as two-dimensional images; a three-dimensional conversion step of converting the two-dimensional images into three-dimensional images using a predetermined three-dimensional conversion parameter, and a calculation step of calculating the welding-groove position based on the three-dimensional data of the projected slit-light images, and relative positions between the projected slit-light images in the three-dimensional data defined by shapes and arrangement of the thin members.

Method, apparatus and system for measuring a welding-groove position

Growing community of inventors

Akashi, Japan

Tadao Shimada