Methods for controlling sensitivity of electrostrictive transduc

Details Methods for controlling sensitivity of electrostrictive transduc Methods for controlling sensitivity of electrostrictive transduc

1996-09-11

1997-11-04

Noland, Thomas P.

Measuring and testing

Instrument proving or calibrating

Volume of flow, speed of flow, volume rate of flow, or mass...

324601, G01N 2922

Patent

active

056842430

ABSTRACT:
Apparatus and methods for controlling electrostrictive transducer sensitivity in a pulse-echo medical ultrasound system. Certain characteristics of each transducer element are tested after manufacture and recorded on a storage medium. The stored data is then used, along with certain model relations, for monitoring certain operational parameters of the transducer during use, and feedback compensation applied for maintaining the transducer sensitivity substantially constant. The parameters to be monitored may include the temperature, acoustic pressure, input power, and a figure of merit determined from the dielectric constant and coupling coefficient.

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