This paper develops an energy-aware ultrasonic sensor network architecture using a Pulse Switching approach for lightweight,
through-substrate operation in Structural Health Monitoring applications. Pulse Switching protocols employ
single pulses instead of multi-bit packets for information delivery with maximal lightness in event monitoring with
binary sensing requirements i.e. where event information transmitted is only a single bit (YES / NO) based on evaluation
of structural characteristics. The paper presents a simulation study of the Energy-Aware Through-Substrate Pulse
Switching protocol performance for structural monitoring when operated using energy harvested from intermittent
vibrations in the structure itself. The paper incorporates an energy harvesting model for simulating memory-less
vibration patterns using exponentially distributed random processes at different networked nodes. These nodes are
placed inside a rectangular plate structure and the corresponding harvested energy profiles are simulated. The vibration
profiles are a function of the position of the node on the plate as well as time. Such spatio-temporal variation leads to
interesting dynamics in the energy-aware protocol operation which have been explored in the current paper setting.
Through the simulations, it is shown that the proposed Energy-Aware Pulse Switching protocol mechanisms can offer a
robust through-substrate network that can be reliably used for Structural Health Monitoring using vibration-harvested
Saptarshi Das, Yan Shi, Bo Dong, and Subir Biswas, "Impacts of structural vibration on the performance of ultrasound sensor networks powered by vibration-harvested energy," Proc. SPIE 9803, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2016, 98032G (Presented at SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring: March 23, 2016; Published: 20 April 2016); https://doi.org/10.1117/12.2219445.
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