Intelligent Power Management System for Wireless Shm That Integrates a Radio-Triggering Function

Abstract eng:
Characterized by its low manufacturing costs, low power requirements, miniaturize size, and the lack of any cables, the wireless sensor network (WSN) is an attractive sensing technology for structural health monitoring (SHM). The conventional sources of energy for sensing nodes in wireless sensors networks (WSN) that are utilized to monitor the health of structures are lithium-ion batteries. Improving the stability and durability of the energy supply for the sensing nodes in a WSN is an important goal in the field of SHM. The periodic entering of control sensors into a low-power mode or sleep state is frequently used to reduce their energy consumption. However, the need for faultless time synchronization makes implementation in large-scale WSNs difficult. If a node receives a sampling command but is in the listening-time cycle, then the sampling process is delayed. In that case, a radio triggering function can improve the stability and durability of a sensing node when it is integrated with an external low-power circuit that is attached to a sensing node. Wirelessly transmitting a wakeup command when particular start-up conditions are met to awaken wireless sampling nodes is effective. This work proposes a dual radio cooperation scheme that is based on the wake-on-radio (WOR) method to construct an intelligent, energy-saving WSN. Four testing cases are investigated and the power consumptions are measured and compared. The intelligent sensor is a more effective conventional sensor than traditional alwayson sensing nodes in measuring structural responses to an earthquake, as it has a longer sleeping time, saves energy and extends the lifetime of the associated wireless sensing system.

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