Holder for ultrasonic transducers

Details Holder for ultrasonic transducers Holder for ultrasonic transducers

1996-10-21

1998-09-29

Biegel, Ronald L.

Measuring and testing

Volume or rate of flow

By measuring vibrations or acoustic energy

G01F 166

Patent

active

058147365

ABSTRACT:
In ultrasound flow rate meters, an acoustical short circuit between ultrasonic transducers is a special problem. Such a short circuit results in an ultrasonic signal being propagated through a wall of a measuring tube from a sending to a receiving transducer and not being influenced by a medium in the measuring tube. Sealing off a gas path around the ultrasonic transducers is also problematic. In order to solve the problem, the ultrasonic transducers are sheathed with an elastomer molded body. From 25% to 60% of an outer surface of the ultrasonic transducer, which is constructed as a cup-type transducer, is lined with the elastomer molded body, beginning at a cup edge thereof. Contact of the holder with the ultrasonic transducer is minimal and occurs only in an acoustically quiet zone.

REFERENCES:
patent: 3771117 (1973-11-01), Shaffer et al.
patent: 4011473 (1977-03-01), Massa
patent: 4593699 (1986-06-01), Poncy et al.

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