Journal
SMART MATERIALS AND STRUCTURES
Volume 23, Issue 12, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0964-1726/23/12/125030
Keywords
SHM; PZT transducers; stress wave; smart aggregate; channel response; channel capacity
Funding
- National Science Foundation [ECCS-1101547, CNS-0832089, CCSS-CPS1102195]
- National Science Foundation of China [51278084]
- Directorate For Engineering [1101547] Funding Source: National Science Foundation
- Div Of Electrical, Commun & Cyber Sys [1101547] Funding Source: National Science Foundation
- Div Of Electrical, Commun & Cyber Sys
- Directorate For Engineering [1102195] Funding Source: National Science Foundation
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In this paper, we explore the characteristics of a concrete block as a communication medium with piezoelectric transducers. Lead zirconate titanate (PZT) is a piezoceramic material used in smart materials intended for structural health monitoring (SHM). Additionally, a PZT based smart aggregate (SA) is capable of implementing stress wave communications which is utilized for investigating the properties of an SA based concrete channel. Our experiments characterize single-input single-output and multiple-input multiple-output (MIMO) concrete channels in order to determine the potential capacity limits of SAs for stress wave communication. We first provide estimates and validate the concrete channel response. Followed by a theoretical upper bound for data rate capacity of our two channels, demonstrating a near-twofold increase in channel capacity by utilizing multiple transceivers to form an MIMO system. Our channel modeling techniques and results are also helpful to researchers using SAs with regards to SHM, energy harvesting and stress wave communications.
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