DETECTOR FOR STRIP-SHAPED MATERIAL

Japanese Patent JPH02254303

A

PURPOSE:To detect the snaking amount and the width of a strip-shaped material accurately and stably by providing a pair of mounts, a pair of three-dimensional image sensing devices, purging devices, an image processing device, and an operating device. CONSTITUTION:Mounts 13 and 13 have moving means for movement in the width direction of a strip-shaped material. Three-dimensional image sensing devices 18 and 18 using optical cameras 18a and 18b and 18c and 18d accommodate both edge parts of the strip-shaped material 11 in the direction of the width in the fields of view. Purging devices 22 and 22 always purify the fields of view of the three-dimensional image sensing devices 18 and 18 effectively. An image processing device 20 computes the edge positions in the fields of view of the cameras based on the image signals from the cameras. An operating device 17 computes the two-dimensional position coordinates of the edge positions in the direction of the height and the direction of the width based on the edge positions by a triangulation method. The snaking amount or the width of the strip-shaped material is computed based on the position coordinates of both edges and the position coordinates of the mounts. In this way, the snaking amount and the width of the strip-shaped material can be detected accurately without the effects of up and down movement and the inclination of the strip-shaped material.

YOSHIKAWA HIROBUMI
NISHIZAKI JUNICHI
WATANABE MAKOTO
KAWADA NORIYUKI
OKAI TAKASHI

JP7492089A

October 15, 1990

March 29, 1989

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MITSUBISHI HEAVY IND LTD

G01B11/04; B21C51/00; B65H23/022; B65H26/02; (IPC1-7): B21C51/00; B65H23/022; B65H26/02; G01B11/04

JP59071109B

Mitsuishi Toshiro

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