Handwriting apparatus for information collection based on force and position
First Claim
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1. An apparatus for gathering and collecting handwritten information based upon force and position of a writing instrument comprising in combination:
- a tablet means for sensing a first position component along a first axis in a Cartesian coordinate system and for sensing a second position component along a second axis in said Cartesian coordinate system transverse to said first axis;
force sensing means within said writing instrument for sensing force generated by the writing instrument about a point at the intersection of said first axis and said second axis, said force being expressible in third, fourth and fifth spatial axes related to orientation of said writing instrument, said force sensing means including;
means for sensing a first force component in said third axis,means for sensing a second force component in said fourth axis transverse to said third axis, andmeans for sensing a third force component in said fifth axis transverse to said third axis and said fourth axis;
means for logging, with respect to time, said first position component, said second position component, said first force component, said second force component and said third force component to produce logged position and force information; and
means responsive to said logged position and force information for combining said logged position and force information to produce output information.
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Abstract
An apparatus for collecting information directly at a point on a surface comprises the combination of a stylus with means for sensing force along at least one axis in a surface at a point on the surface and a position sensing platen or pad with means for sensing a true position along at least one axis on the surface at the point in question. Collected information is processed to obtain figures of merit. Features extraction or rubbery correlation in five dimensions may be employed to obtain suitable figures of merit for objective evaluation.
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Citations
12 Claims
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1. An apparatus for gathering and collecting handwritten information based upon force and position of a writing instrument comprising in combination:
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a tablet means for sensing a first position component along a first axis in a Cartesian coordinate system and for sensing a second position component along a second axis in said Cartesian coordinate system transverse to said first axis; force sensing means within said writing instrument for sensing force generated by the writing instrument about a point at the intersection of said first axis and said second axis, said force being expressible in third, fourth and fifth spatial axes related to orientation of said writing instrument, said force sensing means including; means for sensing a first force component in said third axis, means for sensing a second force component in said fourth axis transverse to said third axis, and means for sensing a third force component in said fifth axis transverse to said third axis and said fourth axis; means for logging, with respect to time, said first position component, said second position component, said first force component, said second force component and said third force component to produce logged position and force information; and means responsive to said logged position and force information for combining said logged position and force information to produce output information. - View Dependent Claims (2, 3, 4)
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5. A method for gathering and collecting information based upon force and position of a stylus point of a writing instrument, said method comprising the steps of:
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(a) sensing a first position component of a stylus point along a first axis in a Cartesian coordinate system with respect to time; (b) sensing a second position component of said stylus point along a second axis in said Cartesian coordinate system transverse to said first axis with respect to time; (c) sensing a first force component at said stylus point at an intersection of said first axis and said second axis in a third axis related to orientation of said writing instrument with respect to time; (d) sensing a second force component at said stylus point at said intersection of said first axis and said second axis in a fourth axis related to orientation of said writing instrument transverse to said third axis with respect to time; and (e) sensing a third force component at said stylus point at an intersection of said first axis and said second axis in a fifth axis related to orientation of said writing instrument transverse to said third axis and to said fourth axis with respect to time; (f) logging, with respect to a common time reference, said first position component, said second position component, said first force component, said second force component and said third force component to obtain force and position information relative to a common stylus point which is time correlated; (g) combining said first and second position components and said first, second and third force components to produce output information; and (h) providing said output information to an output device. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12)
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Specification