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US 10,870,948 B2Granted
Method of measuring thickness of long sheet material and thickness measuring system
AssigneesP.S.M. International PLC, Procemex Oy
InventorHisataka Shitara
Life of this patent
Estimating the term…
Abstract
A method of measuring the thickness of long sheet material wound on to a reel spool while being pressed by a reel drum, includes: measuring the increase in the roll diameter of the wound roll formed from the long sheet material in a non-contact manner; measuring the number of rotations of the reel spool; and determining the thickness of the long sheet material by calculation using the measured increase in the roll diameter and the number of rotations.
Claims4
A method of measuring thickness of a long sheet material wound on to a reel spool while being pressed by a reel drum, comprising:
- arranging the position of the reel drum to be fixed, and the reel spool to be movable relative to the reel drum in a machine direction in accordance with an increase in a diameter of a wound roll formed by the reel spool and the long sheet material wound on to the reel spool;
- measuring the increase in the diameter of the wound roll by measuring an amount of movement in the machine direction of the center position of a shaft of the reel spool, wherein the measurement is carried out by taking, using a camera, an image of an end surface of the shaft of the reel spool during rotation of the reel spool, and by processing the image taken by the camera to determine the amount of movement of the center position of the shaft of the reel spool during the rotation;
- measuring a number of rotations of the reel spool;
- and
- calculating the thickness of the long sheet material using the measured increase in the diameter of the wound roll and the number of rotations.
2 more elements
Dependencies are inferred from the claim text.