Resumo

BOTERO-VALENCIA, Juan Sebastián  e  MORANTES-GUZMAN, Luis Javier. Distance Estimation with Reflective Optical Sensors Using Neural Networks with Radial Basis Functions for Embedded Applications. Ing. Univ. [online]. 2013, vol.17, n.1, pp.27-40. ISSN 0123-2126.

Reflective optical sensors that measure distances are characterized by the non-linearity of their output. Processing units in which these are used must allow for such conditions. This paper aims to reduce computational costs regarding storage capacity and processing times by linearizing sensor outputs to be used in low-budget embedded systems. Results from two different sensors show that the esteemed exponential curve can be adjusted using neural networks with radial basis functions, with a reduction of over 50% in processing time. Regarding the design of the network, the paper focused on its efficiency in terms of the size of the network and the distribution of centroids, yielding important results. The achieved reduction in time and space allows for the use of the system's resources in other tasks, while it also allows for an increase of the sampling frequency in data acquisition.

Palavras-chave : Sensor linearization; distance optical sensors; neural networks with radial basis functions.

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