TRANSDUCER MINI-HORN ARRAY FOR ULTRASONIC FLOW METER

摘要

A monolithic matching structure for use in an ultrasonic transducer. The matching structure includes a mini-horn array. The mini-horn array includes a back plate, a plurality of horns, and a front plate. The plurality of horns extend from the back plate. Each of the horns includes a base and a neck. The base is adjacent the back plate. The neck extends from the base. Transverse area of the base is larger than transverse area of the neck. The front plate is adjacent the neck of each of the horns.

主权项

1. An ultrasonic flow meter, comprising:
a central passage for flow of a fluid stream to be metered; a plurality of pairs of ultrasonic transducers, each pair of transducers configured to form a chordal path across the passage between the transducers, each of the transducers comprising:
a piezoelectric crystal; anda matching structure comprising a mini-horn array that is coupled to the piezoelectric crystal, the mini-horn array comprising:
a back plate adjacent to the piezoelectric crystal;a plurality of horns extending from the back plate and away from the piezoelectric crystal, each of the horns comprising:
a base adjacent the back plate; anda neck extending from the base, wherein transverse area of the base is larger than transverse area of the neck;a front plate adjacent the neck of each of the horns.