Ultrasound transducer and drive system

Details Ultrasound transducer and drive system Ultrasound transducer and drive system

1982-09-20

1984-10-30

Birmiel, Howard A.

Measuring and testing

Vibration

By mechanical waves

73621, 73633, 128660, 310268, 318653, G01N 2900

Patent

active

044793880

ABSTRACT:
An ultrasound probe includes an acoustical mirror that deflects an ultrasound beam generated by an ultrasound crystal toward an object under examination. The probe includes a thin flat motor whose rotor is controlled by a control system. The control system creates commutating signals that are applied to stator coils of the motor. An error signal that is related to the difference between the actual and desired positions of the object rotated by the motor is applied to the commutating signals to alter their amplitude or polarity to change the torque developed by the motor.

REFERENCES:
patent: 4102204 (1978-07-01), Kretz
patent: 4143554 (1979-03-01), Nagy
patent: 4149419 (1979-04-01), Cornell, Jr.
patent: 4187455 (1980-02-01), Martin
patent: 4260920 (1981-04-01), Nakamura et al.
patent: 4264848 (1981-04-01), Jansen
patent: 4330874 (1982-05-01), Sorwick
patent: 4349770 (1982-09-01), Ragen
patent: 4366422 (1982-12-01), Rhodes
patent: 4413895 (1983-11-01), Lee

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