TY - GEN
T1 - RF-Tag-Referenced Structural Displacement Measurements with Multiple Moving Interferers
AU - Rodrigues, Davi V.Q.
AU - Li, Changzhi
N1 - Funding Information:
The authors wish to acknowledge National Science Foundation (NSF) for funding support under the Grant 1808613 and the Grant 2030094.
Publisher Copyright:
© 2022 IEEE.
PY - 2022
Y1 - 2022
N2 - Doppler radars have potential for accurate structural displacement measurements by transmitting radio frequency (RF) waves that are phase-modulated by the motion of a vibrating target. Existing works have considered the use of active and passive tags to improve the measurement accuracy by either increasing the signal to noise ratio of the received signal or by doubling the frequency of the returned signal. However, structural displacement estimation using Doppler radars in scenarios with strong interferences has not been reported. In this paper, the feasibility of using Doppler radars assisted by active RF tags to estimate structural displacement when multiple moving objects are also illuminated by the same sensor is investigated. Leveraging an active tag, the signal associated with the structural vibration is upconverted to allow easy frequency discrimination for the signal of interest. By applying a digital filtering-based approach, interference rejection is achieved, and an accurate tag-referenced displacement can be retrieved.
AB - Doppler radars have potential for accurate structural displacement measurements by transmitting radio frequency (RF) waves that are phase-modulated by the motion of a vibrating target. Existing works have considered the use of active and passive tags to improve the measurement accuracy by either increasing the signal to noise ratio of the received signal or by doubling the frequency of the returned signal. However, structural displacement estimation using Doppler radars in scenarios with strong interferences has not been reported. In this paper, the feasibility of using Doppler radars assisted by active RF tags to estimate structural displacement when multiple moving objects are also illuminated by the same sensor is investigated. Leveraging an active tag, the signal associated with the structural vibration is upconverted to allow easy frequency discrimination for the signal of interest. By applying a digital filtering-based approach, interference rejection is achieved, and an accurate tag-referenced displacement can be retrieved.
KW - Doppler radar
KW - RF tag
KW - clutter rejection
KW - displacement measurement
KW - remote detection
KW - structural health monitoring (SHM)
UR - http://www.scopus.com/inward/record.url?scp=85127459524&partnerID=8YFLogxK
U2 - 10.1109/WiSNet53095.2022.9721376
DO - 10.1109/WiSNet53095.2022.9721376
M3 - Conference contribution
AN - SCOPUS:85127459524
T3 - 2022 IEEE Topical Conference on Wireless Sensors and Sensor Networks, WiSNeT 2022
SP - 14
EP - 17
BT - 2022 IEEE Topical Conference on Wireless Sensors and Sensor Networks, WiSNeT 2022
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2022 IEEE Topical Conference on Wireless Sensors and Sensor Networks, WiSNeT 2022
Y2 - 16 January 2022 through 19 January 2022
ER -