Oscillation degree measuring apparatus

Details Oscillation degree measuring apparatus Oscillation degree measuring apparatus

1990-10-26

1992-11-10

Shay, David M.

Surgery

Truss

Perineal

12866001, 604 22, 73573, 73576, 73579, 73602, A61B 1760

Patent

active

051615215

ABSTRACT:
An oscillation degree measuring apparatus measures the fixing state of an object to be measured as a numerical value of the degree of oscillation and comprises an ultrasonic exciter for generating ultrasonic waves which shock the object and exciting oscillations, an oscillation detector for detecting the oscillations of the object and converting the oscillations into electrical signals, a band amplifier for extracting a signal element of a predetermined frequency band including a resonant frequency of the object from the detected signals from the oscillation detector, a smoothing circuit for smoothing the signals amplified by the band amplifier, an A/D converter for converting the signals smoothed by the smoothing circuit into digital signals, a control device for operating the A/D converter a plurality of times every time a predetermined time passes, and a data processor for finding an average value of a plurality of digital data obtained by the A/D converter and calculating the degree of oscillation based on the average value.

REFERENCES:
patent: 4383446 (1983-05-01), Roeder et al.
patent: 4502329 (1985-03-01), Fukunaga et al.
patent: 4543827 (1985-10-01), Tominaga et al.

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