1 April 2010 Infrasonic energy harvesting for embedded structural health monitoring micro-sensors
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Many signals of interest in structural engineering, for example seismic activity, lie in the infrasonic range (frequency less than 20Hz). This poses a significant challenge for developing self-powered structural health monitoring sensors that are required not only to monitor rare infrasonic events but also to harvest the energy for sensing, computation and storage from the signal being monitored. In this paper, we show that a linear injection response of our previously reported piezo-floating-gate sensor is ideal for self-powered sensing and computation of infrasonic signals. Our experimental results demonstrate that the sensor fabricated in a 0.5- μm CMOS technology can compute and record level crossing statistics of an input infrasonic event with total current less than 10nA.
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Chenling Huang, Chenling Huang, Nizar Lajnef, Nizar Lajnef, Shantanu Chakrabartty, Shantanu Chakrabartty, } "Infrasonic energy harvesting for embedded structural health monitoring micro-sensors", Proc. SPIE 7647, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2010, 764746 (1 April 2010); doi: 10.1117/12.847328; https://doi.org/10.1117/12.847328

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