| 摘要 |
An oscillatory pressure sensor providing an alternating electrical signal representing an oscillation in differential pressure comprises a piezo electric transducer contained within a cavity included in the sensor body in a compressed relationship between two opposite thin side walls of the cavity, which two opposite thin side walls are respectively connected to deflective portions of two thin deflective partitioning walls respectively constituting a planar barrier between two fluid pressures, wherein the combination of deflective motions of the two thin deflective partitioning walls produced by the differential pressure thereacross induces an alternating stress in a piezo electric disc included in the piezo electric transducer and generates an alternating electrical signal from the piezo electric transducer.
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