Tactile on-chip pre-processing with techniques from artificial retinas

R. Maldonado-Lopez; F. Vidal-Verdu; G. Linan; E. Roca; A. Rodriguez-Vazquez

doi:10.1117/12.607605

29 June 2005 Tactile on-chip pre-processing with techniques from artificial retinas

R. Maldonado-Lopez, F. Vidal-Verdu, G. Linan, E. Roca, A. Rodriguez-Vazquez

Proceedings Volume 5839, Bioengineered and Bioinspired Systems II; (2005) https://doi.org/10.1117/12.607605
Event: Microtechnologies for the New Millennium 2005, 2005, Sevilla, Spain

Abstract

The interest in tactile sensors is increasing as their use in complex unstructured environments is demanded, like in telepresence, minimal invasive surgery, robotics etc. The matrix of pressure data these devices provide can be managed with many image processing algorithms to extract the required information. However, as in the case of vision chips or artificial retinas, problems arise when the array size and the computation complexity increase. Having a look to the skin, the information collected by every mechanoreceptor is not carried to the brain for its processing, but some complex pre-processing is performed to fit the limited throughput of the nervous system. This is specially important for high bandwidth demanding tasks. Experimental works report that neural response of skin mechanoreceptors encodes the change in local shape from an offset level rather than the absolute force or pressure distributions. This is also the behavior of the retina, which implements a spatio-temporal averaging. We propose the same strategy in tactile preprocessing, and we show preliminary results when it faces the detection of the slip, which involves fast real-time processing.

Citation Download Citation

R. Maldonado-Lopez, F. Vidal-Verdu, G. Linan, E. Roca, and A. Rodriguez-Vazquez "Tactile on-chip pre-processing with techniques from artificial retinas", Proc. SPIE 5839, Bioengineered and Bioinspired Systems II, (29 June 2005); https://doi.org/10.1117/12.607605

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