Tactility and haptic models | Physical Computing



Models for haptic, tactile, ergonomics and forced feedback experiments



Magnetic ticks divided in 18 steps. Every steps haptics are like a bell-curve with a sharper downhill. There is no sound, and the shaky feeling gives associations to the to much coffee syndrome. Its a very pleasant feeling, adding sound would maybe remove the nervous feeling. There is no visual indicator of position. A glass-dust-blown(?) surface with a sharp edge gives precise tactile feedback of rotation and movement.
The wheel is concave, and gives the most varied grips by the hand. Its raised above the surface for easy access. When the wheel is released a very interesting shake occurs when it position it self between the magnetic fields. Adding an small impression of Attitude





Very nice and tiny mechanical 12 ticks made by a 0,1mm thick jump of a ball magnet in a row of small BB gun bullets. Thick-mechanism is also the switch for a Led circuit for visual feedback along with the distinct tick sound and vibration. The surface is polished and has a finger-hole for visual and haptic position.
The wheel is leveled with the surface, this makes it harder to control but also has the advantage in using the casing as a reference and support when spinning. The finger-hole is too small for a male finger. If the surface had more friction it would be better in conjunction with the hole.
A polished surfaces friction is depending on the fingers skin-moisture. To dry- no friction, moist- and it may become too much giving a forced feedback mechanism a tough job spinning the wheel.





Larger wheel, Milled surface and a very tiny indicator for both visual and tactile position feedback. The wheels edge is larger than the box allowing a number of grips. This is the forced feedback model, a tiny motor run by a micro-controller simulating different forced feedback functions, sensors counts the speed and direction of the wheel.

A menu with main-levels and sub-levels is divided in resistance in the wheel for short and longer time-span. A function for simulating analog and mechanical flywheel mass is possible for task allocating. A number of Attitude functions may also be experienced with this model.

External Links: Haptiske grensesnitt - å berøre en digital verden
Hans Vanhauwaert Bjelland 28.10.2002

His Homepage

A more detailed rapport on this model experiments is also made.


Team: Pål Espensen and me.

Posted: Ons. - April 5, 2006 at 10:58 PM          

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