Inductive transducer, for electric household appliances, with an electric calibration module, and method of calibrating an inductive transducer

摘要

An inductive transducer (1) for electric household appliances, having a casing (2) having an inner measuring chamber (3) into which a pressurized fluid is fed; a membrane (5) fitted to the inner measuring chamber (3) and deformable by the pressure of the fluid, so as to define, with the inner measuring chamber (3), a variable-volume chamber; a coil (8) facing the membrane (5); an interacting device (6, 7) which deformation of the membrane (5) causes to interact magnetically with the coil (8), so that the inductance (L) of the coil (8) varies as a function of the position of the interacting device (6, 7) with respect to said coil (8); and an electric circuit (9) connected to the coil (8) to supply an electric signal (Sf) whose frequency varies as a function of the inductance (L) of the coil (8); and wherein the electric circuit (9) has a resistive calibration module (15) of variable resistance (R1); the variation in the resistance (R1) of the calibration module (15) adjusting the transduction curve of the transducer (1).