Fig. 6: CASA with sensing capability and its application to tactile communication.
From: Actuating compact wearable augmented reality devices by multifunctional artificial muscle

a Schematic of CASA’s sensing capability measuring the external contact. b Normalized resistance as a function of applied force under loading–unloading test. c Concept of tactile communication using actuation and sensing capability of the CASA. d, e Normalized sensor output for each finger and corresponding Braille code to input H, O, W, A, R, E, Y, O, U, ? and G, R, E, A, T, !, respectively.