Measuring device for the continuous measurement of the thickness of sheet metal strips, in particular for use in the case of sheet metal rolling plants

摘要

The thickness (S) of the strip (13) is deduced from measurements of the positions of the wipers of two potentiometers (16, 17) coupled to respective electrically-insulated rollers (2,1) which are urged against opposite faces by pistons (4,3) sliding in cylinders (8,7) supplied (12) with air under pressure. The pistons have equal surfaces (15, 14) under equal pressures and are constrained by internal springs (10,9). If the strip (13) moves (x or y) into another plane with unaltered thickness, the air column (11) oscillates slightly while roller contact (19) is maintained. ADVANTAGE - Forces on both measuring rollers are maintained equal in different positions of measurement planes.