Sensor apparatus
AssigneeGEC-Marconi Limited
InventorRoger M. Langdon
Life of this patent
Estimating the term…
Abstract
A sensor, for use in determining physical properties of fluid, comprises a flexible diaphragm having a plane. Two tines depend from the diaphragm substantially at right angles to the plane. First and second substantially planar transducers are each bonded to the diaphragm so that the plane of the transducers are parallel to that of the diaphragm. A first one of the transducers is operative, in use, to flex between in its plane and to couple an alternating driving force into the plane of the diaphragm such that the tines vibrate in an oscillatory motion. Second of the transducers is operative to detect vibrations of the diaphragm.
Claims16
A sensor, for use in determining physical properties of a fluid, comprising a flexible diaphragm having a plane, two tines depending from said diaphragm substantially at right angles to the plane of said diaphragm, first and second substantially planar transducers each bonded to said diaphragm such that the plane of each transducer is parallel to the plane of said diaphragm, a first of said transducers being operative, in use, to flex in its plane and to couple an alternating driving force into the plane of the diaphragm such that the tines vibrate in an oscillatory motion, the second of said transducers being operative to detect vibrations of the diaphragm.
A sensor, according to claim wherein the transducers are located within an enclosed compartment having walls and where each transducer is uncompressed by the walls of the compartment.
Dependencies are inferred from the claim text.