Moving transducer systems

Details Moving transducer systems Moving transducer systems

1979-03-01

1980-11-11

Gill, James J.

Measuring and testing

Vibration

By mechanical waves

73628, G01N 2904

Patent

active

042325560

ABSTRACT:
In an ultrasonic transducer probe having multiple rotating transducer elements the transducer outputs are switched in response to sine and cosine signals from a resolver. The same signals are used to switch and time the display scan. If the transducers are misaligned a multiple blurred image may result. It is proposed to modify the resolver signals changing the phase of the signals for at least one transducer to bring the display signals into registration. In one example it is achieved by, for at least one transducer element output, mixing a proportion of at least one of the sine and cosine signals with the other.

REFERENCES:
patent: 3779234 (1973-12-01), Eggleton et al.
"Ultrasonic Visualization of Left Ventricular Dynamics", from IEEE Transactions on Sonics and Ultrasonics, Jul. 1970.

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