Mitsubishi Jukogyo Kabushiki Kaisha

Sumitomo Metal Industries, Inc.

Itsuo Murata

Noriyuki Kawada

Hironari Okitomo

Hirofumi Yoshikawa

Takashi Okai

Koji Horimoto

Kazuto Nagata

Kazunori Tsuruta

Keiichi Kobayashi

Shigetaka Hosaka

Katsumasa Hironaka

Hiroshi Hatakeyama

Osamu Torii

Satoshi Kunimitsu

Hiroaki Himeno

An apparatus for recognizing a position, a diameter and a width of a cylindrical object such as a coil made of thin steel plate being wound while observed by a TV camera in unmanned manner. The coil is irradiated with laser light while the laser light is moved in the direction perpendicular to an axial direction of the coil. An image data by the laser light is obtained from a difference of image data in the case where the coil is irradiated with the laser light and in the case where the coil is not irradiated with the laser light. The image data is analyzed to obtain data such as the position and the like. In order to improve an S/N ratio of the image data, the difference signal is binarized and then integrated for a frame. Influence of the background light can be minimized and a memory capacity for the image data can be reduced.

Apparatus for position data acquisition and an apparatus for coil

A method of centering a hollow cylindrical piece of work comprises measuring the outside and inside diameters and contours of the work by means of outside- and inside-diameter-measuring instruments relative to the common centerline of the instruments taken as the virtual center of the work, inputting the measured values with corrections made for any deflection of the work and for any error arising from the instruments, to an electronic computer, and allowing the computer to memorize the information and operate to find the real center of the hollow cylindrical work on the basis of the stored information, whereby the location of the real center and machining allowances necessary for obtaining a product finished to the desired contours can be be computed.

Method of centering hollow cylindrical workpiece

Growing community of inventors

Hiroshima, Japan

Itsuo Murata