Patent ID: 7180285
Filing Date: 2007-02-20
Classification: A47L,D06F,G01L

Abstract:
1. An electrodynamic position transducer comprising: a hollow rigid casing with a membrane mounted therein, which defines at least one chamber of variable volume; at least one winding; an interaction element that interacts magnetically with the winding by the effect of a displacement of the membrane so that the inductance of the winding is variable as a function of the relative position of the interaction element with respect to the winding; and circuit means connected to said winding that provides electrical signals of which one parameter is variable depending on the inductance of said winding; wherein said circuit means comprises electronic memory means that store data representative of corrective values which, when applied to effective instantaneous values of said parameter, to obtain the correct values of said parameter corresponding to a predetermined transduction characteristic; wherein said memory means comprises an input and an output accessible from outside said transducer and connectable to an electronic control unit of an appliance in which the transducer is incorporated, thereby enabling said unit to access the corrective values stored in the said memory means to apply them to the effective instantaneous values of said parameter generated during operation of the transducer.