Apparatus for measuring the flatness of a sheet of

专利名称：Apparatus for measuring the flatness of a

sheet of metal under tension

发明人：VALENCE, MARC申请号：EP83402523.1申请日：19831223公开号：EP0112781B1公开日：19870318

摘要：1. Device for measuring the flatness of a metal strip under tension, including adeflection roller which is transverse with respect to the strip and formed from a shaft (1)carrying a number of rings (2) rotatively mounted on the shaft (1), one after the other, inthe axial direction of the roller, each by means of at least one magnetic bearing, each ringbeing associated with at least one detector (10), fixed on the shaft (1), for measuring theseparation between the rotor and the stator of the magnetic bearing, characterized inthat each of the magnetic bearings of each of the rings (2) is an active magnetic bearing(4) formed from at least one power winding (8) associated with at least one separationdetector (10) and in that the device also includes at least one means of adjustment (32-33) of the energizing currents of the power windings (8) as a function of the separationsmeasured by the corresponding detectors (10) in order to maintain a constant air-gap \"e\"between each of the rings (2) and the shaft (1) and a means (35) of determination, fromthese energizing currents, of the traction in the strip at the position of each of themagnetic bearings (4), representing the flatness of the strip.

申请人：CLECIM

地址：107 boulevard de la Mission Marchand F-92400 Courbevoie FR

国籍：FR

代理机构：Phélip, Bruno

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