Detection thresholds for small haptic effects.
Detection thresholds for small haptic effects.
Inevitably a haptic device which meets the strict weight, power and volume requirements of a hand held device will be capable of only very small forces and displacements compared to existing desktop devices. This leads to two aspects to the question. FHD, a 2 DOF, low friction, direct drive, planar haptic display capable of high fidelity representation of virtual surfaces. Using a forced-choice experiment incorporating an adaptive threshold algorithm, we measured the weakest haptic effects that are detectable via the haptic interface. In the first experiment, the subject is presented with two targets 5 mm wide, spaced 10 mm apart, and located on a horizontal line.