Flexible electrode matrix (6x4) to deliver electrostimulation. Displaying contact on the capacitive array and. Controlling the electrotactile stimulation. PROTOCOL.
ELECTROTACTILE FEEDBACK FROM AN ELECTRONIC SKIN THROUGH FLEXIBLE ELECTRONIC MATRIX M.
1 Franceschi ,
L.
1 Seminara ,
S.
2 Dosen ,
L.
1Cosmic
1 Pinna ,
H.
1 Fares ,
M.
1 Alameh ,
M.
1 Saleh ,
Lab, DITEN, University of Genova, Italy 2Center for Sensory-Motor Interaction, Aalborg University, Denmark 3Department of Bioengineering, Imperial College London, London, United Kingdom
M.
1 Valle ,
D.
3 Farina
Research on active prosthetics for upper limbs focused on improving the control of prostheses [1] (feed-forward interfaces). However, to foster the prosthesis embodiment and utility, it is necessary to have a prosthetic system that also transmits back to the user the information about the current state of the prosthesis. Our scope is to develop a tactile feedback system that is able to sense touch on a prosthesis using an artificial skin based on piezoelectric polymer sensors and deliver this tactile information to the prosthesis user through cutaneous electrotactile stimulation.
M O T I V A T I O N
TARGET SYSTEM
EXISTING: Intuitive motor control from the brain to the prosthesis MISSING: Sensory feedback from the prosthesis to the brain Courtesy of Otto Bock ®
DEMO SYSTEM [2]
B
A
C
D
E
PROTOCOL The volunteer applies different touch patterns on the capaticive array. The demo presenters, not being able to see the touch sensor, only receive information through electrostimulation.
TO BE GUESSED: Position
SETUP A
Capacitive sensor array to receive touch (13x9)
B
Signal Conditioning and Data Acquisition
C
Displaying contact on the capacitive array and Controlling the electrotactile stimulation
D
Programmable multichannel stimulator
E
Flexible electrode matrix (6x4) to deliver electrostimulation
(single touch)
Trajectory (line)
Shape
References [1] Franceschi, M., Seminara, L., Dosen, S., Strbac, M., Valle, M., Farina, D., “A System for Electrotactile Feedback Using Electronic Skin and Flexible Matrix Electrodes: Experimental Evaluation”, (2016) IEEE Transactions on Haptics, 10 (2), pp. 162-172. DOI: 10.1109/TOH.2016.2618377 [2] N. Jiang , S. Dosen , K.-R. Muller and D. Farina, "Myoelectric Control of Artificial Limbs — Is There a Need to Change Focus? [In the Spotlight]," IEEE Signal Processing Magazine, Vol. 29, no. 5, pp. 152,148-150, Sept. 2012
