Electromyographic virtual reality system
First Claim
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1. A method of manipulating a computer simulation of a physical structure in response to an operator having musculature, said method comprising:
- detecting an electromyographic signal from said musculature;
producing a force signal in response to said electromyographic signal;
applying said force to a computer model of said physical structure, said model having nodes;
determining force values and displacements for said nodes; and
providing a visual representation of said model, said representation being formed in response to said displacements.
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Abstract
A finite element model of a structure is manipulated according to electromyographic signal from the musculature of an operator. The resulting forces are fed back to the operator and a display provides visual feedback of the resulting displacements.
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Citations
11 Claims
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1. A method of manipulating a computer simulation of a physical structure in response to an operator having musculature, said method comprising:
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detecting an electromyographic signal from said musculature;
producing a force signal in response to said electromyographic signal;applying said force to a computer model of said physical structure, said model having nodes; determining force values and displacements for said nodes; and providing a visual representation of said model, said representation being formed in response to said displacements. - View Dependent Claims (2, 3, 4, 5)
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6. An apparatus for manipulating a computer simulation of a physical structure in response to an operator having musculature, said apparatus comprising:
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a detector for detecting an electromyographic signal from said musculature; a signal processor producing a force signal in response to said electromyographic signal; a modelling engine containing a computer model of said physical structure, said model having nodes and said force signal being applied to said model to determine force values and displacements for said nodes; and a visual display, said display displaying a representation of said model being deformed in response to said displacements. - View Dependent Claims (7, 8, 9, 10)
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11. An apparatus for manipulating a computer simulation of a physical structure in response to an operator having musculature, said apparatus comprising:
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a sensor connected to said musculature for sensing an electromyographic signal; a band pass filter communicating with said sensor for filtering said electromyographic signal; a mean-square calculating device communicating with said filter for determining the mean-square value of said filtered electromyographic signal; a look-up table communicating with said calculating device, said mean-square value producing a corresponding force signal; a modelling engine containing a finite element computer model of said physical structure, said model having nodes and said force signal being applied to said model to determine force values and displacements for said nodes; a visual display communicating with said modelling engine and displaying a representation of said model being deformed in response to said displacements; and a force feedback device communicating with said modelling engine and providing a force to said musculature in response to said force values.
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Specification