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[153] Citation: J. Dosher, B. Hannaford, 'Detection Thresholds for Small Haptic Effects,'
Proceedings, SPIE Teleoperator and Telemanipulator Workshop, Boston MA, October 29, 2001.
Abstract
In prior research we reported on experiments to measure the smallest
haptic effects the FHD can meaningfully communicate to an operator
(Dosher and Hannaford, 2001). These experiments varied the force
displayed to the subject, with all other factors held constant. In
this paper we report on experiments studying the effects of varying
the size, shape, and pulse-duration of a haptic feature. We again
measure the smallest haptic effects that can be meaningfully
communicated to an operator; however, using a variation of icon
widths, icon waveforms, and static pulse-widths. In this paper we
measure the smallest detectable haptics effects with active
exploration of saw-tooth shaped icons sized 3, 4 and 5 mm, a
sine-shaped icon 5 mm wide, and static pulses 50, 100, and 150 ms in
width. Smooth shaped icons resulted in a detection threshold of
approximately 65 mN, twice that of saw-tooth shaped icons. In the case
of static icons, longer pulse-widths corresponded to slightly higher
threshold values.
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Updated: Tue Jul 15 23:54:51 2008
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