Invention Grant
US08509952B2 Method for position-dependent electronic wear state determination of a valve mechanism, and a pneumatic valve 有权
阀机构位置相关电子磨损状态测定方法及气动阀

Method for position-dependent electronic wear state determination of a valve mechanism, and a pneumatic valve
Abstract:
A method and a valve arrangement are provided for electronic wear state determination of the valve arrangement for controlling a process medium flow. A valve element, which is arranged so as to move axially within a valve housing, is moved via electrically drivable linear drive means on the basis of positioning regulation. The valve element has an essentially constant drive force applied to it, and a position speed profile over the switching travel of the valve element is determined by detecting the speed as a function of the current position of the valve element. A change profile is created by comparing the determined speed profile with previous position speed profiles, as a measure of the position-dependent wear state of the valve mechanism.
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