Vibration generator using rotary bodies having unbalanced weight

Details Vibration generator using rotary bodies having unbalanced weight Vibration generator using rotary bodies having unbalanced weight

1990-03-16

1993-01-26

Hafer, Robert A.

Surgery

Truss

Perineal

A61H 100

Patent

active

051815044

ABSTRACT:
A miniaturized inexpensive vibration generator using rotary bodies having unbalanced weights with no absolute encoders provided on the rotary body driving means. Rotary bodies having unbalanced weights are disposed in an opposed state. Members to be detected are fixed to the rotary bodies so that the members to be detected have a predetermined positional relation with the relative weights and rotation detectors are provided fixedly in the positions close to the loci of the rotational movements of the members to be detected, and adapted to output signals representative of what are detected thereby in the form of pulses each of which is generated every time each of the members to be detected passes the relative rotation detector, i.e., every time each member to be detected is revolved 360.degree., a phase difference computing element computes a phase difference between the unbalanced weights on the basis of the signals from the rotation detectors.

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"Characteristics of Vibration-Induced Finger Flexion Reflex and Its Clinical Applications", Yoichi Endo et al., Jikeikai Med. J., 28: 187-192, 1981.

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