Ultrasonic transducer
AssigneeEndress + Hauser GmbH + Co. KG
InventorManfred Eckert
Life of this patent
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Abstract
This ultrasonic transducer has a high chemical resistance and a small diameter and can be used over a very wide temperature range. It has a single-piece, can-shaped housing (1) sealed off by a diaphragm (12), a sensor element (2), arranged in the housing (1), for transmitting and receiving ultrasound, a matching layer (3) arranged between the diaphragm (12) and the sensor element (2), a stress equalizing layer (5) which completely encloses the sensor element (2) apart from a front area adjoining the matching layer (3) and is made of a thermosetting plastic, especially of an epoxy resin, a clamping ring (4) coaxially enclosing the matching layer (3), and a damping layer (6) that fills a cavity that remains in the housing (1) and is bounded by the clamping ring (4), the stress equalizing layer (5) and the housing (1).
Claims8
An ultrasonic transducer having
- a single-piece can-shaped housing (1) sealed off by a diaphragm (12),
- a sensor element (2), arranged in the housing (1), for transmitting and receiving ultrasound,
- a matching layer (3) arranged between the diaphragm (12) and the sensor element (2),
- a stress equalizing layer (5) which completely encloses the sensor element (2) except for a front side adjoining the matching layer (3) and is made of of an epoxy resin,
- a clamping ring (4) coaxially enclosing the matching layer (3), and
- a damping layer (6) that fills a cavity that remains in the housing (1) and is bounded by the clamping ring (4), the stress equalizing layer (5) and the housing (1).
Dependencies are inferred from the claim text.