title: Impact localization combined with haptic feedback for touch panel applications based on the time-reversal approach.
abstract: In this paper, a combined impact localization and haptic feedback system based on time-reversal signal processing is presented for touch panel applications. Theoretical impulse responses are derived from a propagation model of bending waves in a thin elastic plate. On the basis of the impulse responses, the time-reversal technique is exploited to spot the impact location as well as to generate haptic feedback. The chief advantage of the time-reversal technique lies in its robustness of tackling broadband sources in a reverberant environment. Piezoelectric ceramic plates and voice-coil motors are used as sensors for localization, whereas only voice-coil motors are used as the actuator for haptic feedback. Experimental results demonstrated that the proposed system was effective in precise impact localization for a thin panel, while haptic feedback also implemented using time-reversal principle can generate an impulse at the previously touched position. The combined impact localization and haptic feedback system is capable of enhancing the sensation of man-machine interaction in real time fashion.
authors.affiliation: Department of Power Mechanical Engineering, National Tsing-Hua University, 101 Sectoin 2, Kuang-Fu Raod, Hsin-Chu 300, Taiwan. msbai@pme.nthu.edu.tw
authors.forename: Mingsian R
authors.initials: MR
authors.lastname: Bai
authors.forename: Yao Kun
authors.initials: YK
authors.lastname: Tsai
mesh_terms: D000704:Analysis of Variance; D002516:Ceramics; D003198:Computer Simulation; D004548:Elasticity; D004867:Equipment Design; D005246:Feedback; D006801:Humans; D008328:Man-Machine Systems; D008962:Models, Theoretical; D011312:Pressure; D015203:Reproducibility of Results; D012815:Signal Processing, Computer-Assisted; D013997:Time Factors; D014110:Touch; D014160:Transducers, Pressure; D014584:User-Computer Interface