Marelli Autronica

Gilberto Dendi

Giuseppe Dell'Orto

Roberto Dell'Acqua

Giuseppina Rossi

The sensor includes a rigid support and a diaphragm having a peripheral portion fixed by a layer of glue to the support. The central portion of the diaphragm is spaced from the support and, on its surface facing the support, carries at least one thick-film resistor acting as a piezo-resistive transducer. The diaphragm can deform resiliently towards the support when a pressure is exerted on its other surface. The surface of the support which is connected to the diaphragm is flat, and the layer of glue has a calibrated thickness such that the distance between the diaphragm and the surface of the support at rest is substantially equal to the deflection of the diaphragm corresponding to a predetermined maximum pressure measured.

Pressure sensor

A pressure measuring device comprises a support casing having an aperture, a substrate mounted in the casing and deformable through the effect of a pressure to be measured introduced into the casing through the aperture, at least one electrical deformation sensor, preferably a thick-film resistor, applied to the substrate, circuit means housed in the casing and connected to the at least one electrical deformation sensor for outputting electrical signals indicative, according to a predetermined response curve, of the deformations of the substrate and hence of the pressure acting thereon, and manually-operable electrical adjustment means mounted in the casing and connected to the circuit means, for modifying predetermined characteristics of the response curve.

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Milan, Italy

Gilberto Dendi