Apparatus and methods for controlling sensitivity of transducers

Details Apparatus and methods for controlling sensitivity of transducers Apparatus and methods for controlling sensitivity of transducers

1994-10-31

1996-12-17

Noland, Thomas P.

Measuring and testing

Instrument proving or calibrating

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

12866203, 324601, G01N 2922

Patent

active

055855466

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 substantailly 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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