| 摘要 |
<p>The sensor (1) has a body (20) delimiting a detection cavity (22), and a transducer comprising an actuating unit to vibrate a taut detection cord (210) of the transducer, where the cord includes a portion made of sensitive material. The transducer comprises a measuring unit to measure vibration characteristics e.g. frequencies, of the vibrated cord or to detect variation of the characteristics of the cord related to variation of a physical characteristic e.g. viscosity, density and pressure, of a gaseous medium. The actuating unit and/or measuring unit are formed by a piezoelectric system.</p> |
