Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Having electrical actuator
Patent
1994-07-26
1995-10-17
Willse, David H.
Prosthesis (i.e., artificial body members), parts thereof, or ai
Having electrical actuator
623 58, 623 63, A61F 254, A61F 270
Patent
active
054586550
ABSTRACT:
A control system and method for prosthetic devices is provided. The control system comprises a transducer for receiving movement from a body part for generating a sensing signal associated with that movement. The sensing signal is processed by a linearizer for linearizing the sensing signal to be a linear function of the magnitude of the distance moved by the body part. The linearized sensing signal is normalized to be a function of the entire range of body part movement from the no-shrug position of the moveable body part through the full-shrug position of the moveable body part. The normalized signal is divided into a plurality of discrete command signals. The discrete command signals are used by typical converter devices which are in operational association with the prosthetic device. The converter device uses the discrete command signals for driving the moveable portions of the prosthetic device and its sub-prosthesis. The method for controlling a prosthetic device associated with the present invention comprises the steps of receiving the movement from the body part, generating a sensing signal in association with the movement of the body part, linearizing the sensing signal to be a linear function of the magnitude of the distance moved by the body part, normalizing the linear signal to be a function of the entire range of the body part movement, dividing the normalized signal into a plurality of discrete command signals, and implementing the plurality of discrete command signals for driving the respective moveable prosthesis device and its sub-prosthesis.
REFERENCES:
patent: 3609769 (1971-10-01), Suzuki et al.
patent: 3866246 (1975-02-01), Seamone et al.
patent: 4067070 (1978-01-01), Seamone et al.
Barr Hardie R.
The United States of America as represented by the United States
Willse David H.
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