Low-power multi-sensor system with normally-off sensing technology for IoT applications

Abstract

We propose the low-power multi-sensor system with normally-off sensing technology for IoT applications, which achieves almost zero standby power at the no-operation modes. A hierarchical power management scheme with activity localization can be reduced the number of transitions between power-on and power-off modes with re-scheduling and bundling task procedures. We also propose autonomously standby mode transition control by selecting optimum standby mode of microcontrollers, reducing total power consumption in the multisensor network. The prototyping evaluation boards with sensors are developed and demonstrated, observing 91% power reductions by adopting the proposed power gating and autonomously standby mode transition control.