Woven flexible textile structure for wearable power-generating tactile sensor array

초록

In this paper, we propose and demonstrate a power-generating tactile sensor array in which an energy harvester and an array of tactile sensors are integrated in a single device. The device consists of rows and columns of piezoelectric straps woven on a mesh structure of elastic hollow tubes. The fabricated device, which includes 5 x 5 capacitive tactile sensors in an area of 9x9 cm(2), is highly flexible and stretchable. When the device was stretched in a lateral direction, the maximum output voltage and power were measured as 51 V and 850 mu W, respectively. In addition, the capacitance value employed as a signal for the tactile sensor operation was measured while applying a force vertically to the surface using a force gauge. The initial capacitance and sensitivity of a single cell employed as a tactile sensor were approximately 1.727 pF and 40 fF/N, respectively, within a force range of 2 N.

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