Dresden 2017 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
BP: Fachverband Biologische Physik
BP 31: Posters - Biotechnology and Bioengineering
BP 31.2: Poster
Dienstag, 21. März 2017, 14:00–16:00, P2-OG1
Bionic electrolocation strategy of objects in fluids based on superposition of numerically extracted and shifted EEVs — •Sabine Wolf-Homeyer1, Jacob Engelmann2, and Axel Schneider1 — 1Bielefeld University of Applied Sciences, Germany — 2Bielefeld University, Germany
Additionally to visual sense, weakly electric fish use electrolocation for navigation and to find food even in dark or turbid waters. Specialized muscle cells in the tail region generate a weak electric field around the fish's body. Sensed by electroreceptors on the animals' skin, distortion of the self-generated electric field, caused by objects, is perceived. Furthermore the fish executes scanning behavior to obtain additional sensory information like size, shape and material properties of detected objects in their vicinity. Inspired by the biological model, a fixed minimal scanning strategy, composed of active receptor-system movements, is developed. The aim of this strategy is the unique identification of object-positions. With the aid of a bio-mimetic abstraction of the receptor-system, a scanning-method for active electrolocation is developed. The method is based on the superposition of numerical extracted EEV- (Ensemble of Electrosensory Viewpoints) contour-rings [Solberg et al., International Journal of Robotics Research, 27(5), pp. 529-548], which are previously simulated by means of FEM. To identify an optimal scanning strategy, the uniqueness of object positions for permutations of sensor movement sequences was evaluated. The best resulting concatenation of receptor-system movements consists of the combination of a linear shift, a rotation and the original EEV.