Enhancing In-Situ Structural Health Monitoring through RF Energy-Powered Sensor Nodes and Mobile Platform

by   Yu Luo, et al.
The University of Alabama
Mississippi State University

This research contributes to long-term structural health monitoring (SHM) by exploring radio frequency energy-powered sensor nodes (RF-SNs) embedded in concrete. Unlike traditional in-situ monitoring systems relying on batteries or wire-connected power sources, the RF-SN captures radio energy from a mobile radio transmitter for sensing and communication. This offers a cost-effective solution for consistent in-situ perception. To optimize the system performance across various situations, we've explored both active and passive communication methods. For the active RF-SN, we implement a specialized control circuit enabling the node to transmit data through ZigBee protocol at low incident power. For the passive RF-SN, radio energy is not only for power but also as a carrier signal, with data conveyed by modulating the amplitude of the backscattered radio wave. To address the challenge of significant attenuation of the backscattering signal in concrete, we utilize a square chirp-based modulation scheme for passive communication. This scheme allows the receiver to successfully decode the data even under a negative signal-to-noise ratio (SNR) condition. The experimental results indicate that an active RF-SN embedded in concrete at a depth of 13.5 cm can be effectively powered by a 915MHz mobile radio transmitter with an effective isotropic radiated power (EIRP) of 32.5dBm. This setup allows the RF-SN to send over 1 kilobyte of data within 10 seconds, with an additional 1.7 kilobytes every 1.6 seconds of extra charging. For the passive RF-SN buried at the same depth, continuous data transmission at a rate of 224 bps with a 3 transmitter is 23.6 dBm.


page 1

page 3

page 8

page 9

page 10

page 12


RF Energy Harvesting Sensor Networks for Healthcare of Animals: Opportunities and Challenges

In recent years, the radio frequency (RF) energy harvesting technique is...

Design Considerations of a Sub-50 μW Receiver Front-end for Implantable Devices in MedRadio Band

Emerging health-monitor applications, such as information transmission t...

Optimal Time Scheduling for Wireless-Powered Backscatter Communication Networks

This letter introduces a novel wireless-powered backscatter communicatio...

Estimating the Relative Speed of RF Jammers in VANETs

Vehicular Ad-Hoc Networks (VANETs) aim at enhancing road safety and prov...

Super Low Resolution RF Powered Accelerometers for Alerting on Hospitalized Patient Bed Exits

Falls have serious consequences and are prevalent in acute hospitals and...

Sitara: Spectrum Measurement Goes Mobile Through Crowd-sourcing

Software-defined radios (SDRs) are often used in the experimental evalua...

Please sign up or login with your details

Forgot password? Click here to reset