Diaphragm pressure transducer comprising a shock protective system, and gradiomanometer incorporating such a transducer

摘要

A pressure transducer (sensor) (20) includes a deformable diaphragm (22) which closes off a fluid passage (18) in a leaktight manner. In order to protect the diaphragm (22) against shocks, the passage (18), comprises a constriction (44) whose dimensions are defined so as to limit the pressure peak applied to the diaphragm to a cutoff value which can be withstood by this diaphragm. The constriction (44) may be formed in a removable capillary tube (42) or may be in the form of grooves made in a silicon wafer integrated with the active part of the sensor.