Ultra-low power flexible piezoelectric audio recognition sensor for Internet-of-Things

Abstract

The piezoelectric voice recognition sensor according to the present invention includes: a flexible film (600); a piezoelectric substance layer (300) laminated on the flexible film (600); and an electrode (500) laminated on the piezoelectric substance layer (300), and the electrode (500) includes a plurality of frequency-separated channels arranged in a line, the plurality of frequency-separated channels being in a state of different lengths from each other. The present invention separates voices sensed by a plurality of frequency separation channels configured in a trapezoidal shape by the plurality of channels according to frequency, and converts the separated voice signals into electric signals by mechanical vibration signals through a piezoelectric element, thereby performing recognition.