Inductive pressure transducer
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United States of America Patent
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Jun 24, 2003
Grant Date -
N/A
app pub date -
Oct 9, 2001
filing date -
Dec 15, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The transducer (1) includes a support structure (2, 3) in which a metal body (8) is mounted, having a flat surface (8a) and on the opposite side a cavity (8b) for exposure to a pressure to be transduced. A thin wall (8c), resiliently deformable like a membrane under the effect of the pressure, is defined between the bottom of the cavity (8b) and the flat surface (8a). An inductor (10) a body of ferromagnetic material (11)is securely fixed to the metal body (8) and has a flat surface (11a) facing the flat surface (8a) of the metal body (8) and an annular recess (12) which defines a central core (13) with a winding (16) arranged therein and a surrounding sleeve (14). A spacer wing (9) of paramagnetic or diamagnetic material, and a calibrated thickness, is interposed between the metal body (8) and the ferromagnetic body (11).
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