Methods of biomimetic finger control by filtering of distributed forelimib pressures
First Claim
Patent Images
1. A method for controlling digit movement on a prosthesis comprising:
- interconnecting a plurality of mechanical sensors at locations on a forelimb;
acquiring data from the sensors during a training phase by flexing phantom digits while pressure signals are digitally sampled and stored;
filtering the data;
processing the data; and
individually controlling digits of the prosthesis in accordance with the processed data.
1 Assignment
0 Petitions
Accused Products
Abstract
A method for controlling digit movement of a prosthesis based on residual forelimb volitional pressures is provided. A filter is provided for discriminating from the distributed pressures to provide reliable digit control. The extracted commands can be used to control actuators in a hand prosthesis to restore biomimetic finger control to the user. Feature extraction algorithms can be based on signal amplitudes (peak amplitude or root mean square). Training signal validation can be based on cepstral encoding. The filter is trained under user supervision.
-
Citations
12 Claims
-
1. A method for controlling digit movement on a prosthesis comprising:
-
interconnecting a plurality of mechanical sensors at locations on a forelimb;
acquiring data from the sensors during a training phase by flexing phantom digits while pressure signals are digitally sampled and stored;
filtering the data;
processing the data; and
individually controlling digits of the prosthesis in accordance with the processed data. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A method of training a filter for discriminating distributed pressures in a forelimb and controlling movements of digits on a prosthesis comprising:
-
positioning a plurality of sensors on a forelimb;
sampling pressure signals at the sensors on the forelimb corresponding to flexing of selected phantom digits; and
extracting an amplitude feature for each sensor resulting in a feature vector for each digit of the prosthesis. - View Dependent Claims (9, 10, 11, 12)
-
Specification