FIG 2 (IMAGE)
Caption
Fig. 2. Validation of shape and hardness recognition ability of multiphotonic tactile neurons. (a) Schematic of the force applied to a single sensing unit of a multiphotonic neuron. (b) Changes in the path of light passing through the waist region under three forces. (c) Stress and deformation diagrams (indicated by color bars) of the waist region of a single sensing unit under three forces. (d) Optical power response plots of a single sensing unit under 0 to 3N normal contact force in steps of 0.2N, with each force transformation held for 5 s. (e) Normal force sensitivity from 0 to 3N, with error bars indicating slight variations in optical power from the response time. (f) Individual sensing unit optical power response when pressure (1N) is repeatedly applied more than 5000 times. The inset shows the optical power response in the two time domains after zooming in. (g) Pressure recognition based on object hardness and shape for six species using support vector machine-SVM machine learning algorithm. (h) Cluster data visualization. (i) Confusion matrix of the six measured objects with 100% recognition accuracy.
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OEA
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