Ultrasonic scanner

Details Ultrasonic scanner Ultrasonic scanner

1984-10-05

1986-04-01

Howell, Kyle L.

Surgery

Truss

Pad

73620, A61B 1000

Patent

active

045791228

ABSTRACT:
The rotation of a motor is converted into a swinging movement of an ultrasonic transducer by a conversion mechanism. The relationship between a rotation angle .theta. of the motor and a swinging angle .eta. of the ultrasonic transducer can be expressed by .eta.=tan.sup.-1 (sin.theta.). The rotation of the motor is detected by a rotation detector of a reluctance type having an eccentric rotor. A signal having a nonlinear relationship with respect to an actual rotation angle .theta. of the motor, which can be expressed by the following equation, is supplied to a motor driver from the rotation detector:

REFERENCES:
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patent: 4106492 (1978-08-01), Schuette et al.
patent: 4120291 (1978-10-01), Paton et al.
patent: 4149419 (1979-04-01), Connell, Jr. et al.
patent: 4151834 (1979-05-01), Sato et al.
patent: 4215585 (1980-08-01), Kunii et al.
patent: 4399703 (1983-08-01), Matzuk
patent: 4418698 (1983-12-01), Dory
patent: 4421118 (1983-12-01), Dow et al.
patent: 4424813 (1984-01-01), Havlice et al.
patent: 4479388 (1983-10-01), Matzuk

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