Patent application for a computer motional command interface
First Claim
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1. A device for sensing presence and motion of a body in an interaction zone, comprising:
- a sensor positioned to pick up electrical fields existing in the interaction zone and providing an output voltage signal representative of the electrical fields sensed;
a first stage buffer amplifier having an input and an output;
a high pass filter connecting the output voltage signal from the sensor to the input of the first stage buffer amplifier;
a second stage amplifier having an input and an output;
a low pass filter connecting the output of the first stage buffer amplifier to the input of the second stage amplifier;
wherein the output of the second stage amplifier is a signal representative of the electrical fields sensed by the sensor within a desired range of frequencies.
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Abstract
A method and apparatus are described for interacting with electronic devices through motional commands. The method uses perturbations of the background quasistatic electric fields. The apparatus measures perturbations in electric potential relative to the background. Body movement is recognized by comparing changes in signals over time. Signals collected from sensors are compared with training sets to recognize specified motional commands or gestures. Upon recognizing the commands, the apparatus issues the predetermined response to the motion.
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Citations
20 Claims
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1. A device for sensing presence and motion of a body in an interaction zone, comprising:
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a sensor positioned to pick up electrical fields existing in the interaction zone and providing an output voltage signal representative of the electrical fields sensed; a first stage buffer amplifier having an input and an output; a high pass filter connecting the output voltage signal from the sensor to the input of the first stage buffer amplifier; a second stage amplifier having an input and an output; a low pass filter connecting the output of the first stage buffer amplifier to the input of the second stage amplifier; wherein the output of the second stage amplifier is a signal representative of the electrical fields sensed by the sensor within a desired range of frequencies. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for sensing presence and motion of a body in an interaction zone, comprising the steps of:
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positioning a sensor to pick up electrical fields existing in the interaction zone and to provide an output voltage signal representative of the electrical fields sensed, the electrical fields sensed including a background electrical field of a particular frequency; eliminating output voltage signal components below a predetermined frequency; thereafter eliminating output voltage signal components above a predetermined frequency; amplifying the resultant signal to provide a processed output signal representative of the electrical fields sensed by the sensor within a desired range of frequencies at a particular time; and comparing the processed output signal representative of the electrical fields sensed by the sensor within a desired range of frequencies at a particular time with a processed output signal obtained for the background electrical field when no body is present in the interaction zone, differences in such signals indicating presence and motion of a body in the interaction zone. - View Dependent Claims (17)
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18. A method of controlling electrical apparatus by a body gesture within an interaction zone, comprising the steps of:
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positioning a sensor to pick up electrical fields existing in the interaction zone and to provide an output voltage signal representative of the electrical fields sensed, the electrical fields sensed including a background electrical field of a particular frequency; eliminating output voltage signal components below a predetermined frequency; thereafter eliminating output voltage signal components above a predetermined frequency; amplifying the resultant signal to provide a processed output signal representative of the electrical fields sensed by the sensor within a desired range of frequencies at a particular time; performing a particular body gesture in the interaction zone and obtaining a plurality of consecutive processed output signals over a particular period of time representing the particular body gesture to create a predefined body gesture signal representative of the particular body gesture; monitoring further processed output signals over monitoring periods of time; comparing the monitored processed output signals with the predefined body gesture signal to determine if the predefined body signal is performed and providing an occurrence signal if the gesture is performed; and using the gesture signal to control the electrical apparatus. - View Dependent Claims (19, 20)
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Specification