PMID- 27748379
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20180402
LR  - 20181113
IS  - 2045-2322 (Electronic)
IS  - 2045-2322 (Linking)
VI  - 6
DP  - 2016 Oct 17
TI  - Enhanced flexural wave sensing by adaptive gradient-index metamaterials.
PG  - 35048
LID - 10.1038/srep35048 [doi]
LID - 35048
AB  - Increasing sensitivity and signal to noise ratios of conventional wave sensors is 
      an interesting topic in structural health monitoring, medical imaging, aerospace 
      and nuclear instrumentation. Here, we report the concept of a gradient 
      piezoelectric self-sensing system by integrating shunting circuitry into 
      conventional sensors. By tuning circuit elements properly, both the quality and 
      quantity of the flexural wave measurement data can be significantly increased for 
      new adaptive sensing applications. Through analytical, numerical and experimental 
      studies, we demonstrate that a metamaterial-based sensing system (MBSS) with 
      gradient bending stiffness can be designed by connecting gradient negative 
      capacitance circuits to an array of piezoelectric patches (sensors). Furthermore, 
      we demonstrate that the proposed system can achieve more than two orders of 
      magnitude amplification of flexural wave signals to overcome the detection limit. 
      This research encompasses fundamental advancements in the MBSS with improved 
      performance and functionalities, and will yield significant advances for a range 
      of applications.
FAU - Chen, Y Y
AU  - Chen YY
AD  - Department of Mechanical and Aerospace Engineering, University of Missouri, 
      Columbia, MO, 65211, USA.
FAU - Zhu, R
AU  - Zhu R
AD  - Department of Mechanical and Aerospace Engineering, University of Missouri, 
      Columbia, MO, 65211, USA.
FAU - Barnhart, M V
AU  - Barnhart MV
AD  - Department of Mechanical and Aerospace Engineering, University of Missouri, 
      Columbia, MO, 65211, USA.
FAU - Huang, G L
AU  - Huang GL
AD  - Department of Mechanical and Aerospace Engineering, University of Missouri, 
      Columbia, MO, 65211, USA.
LA  - eng
PT  - Journal Article
PT  - Research Support, U.S. Gov't, Non-P.H.S.
DEP - 20161017
PL  - England
TA  - Sci Rep
JT  - Scientific reports
JID - 101563288
PMC - PMC5066180
EDAT- 2016/10/18 06:00
MHDA- 2016/10/18 06:01
PMCR- 2016/10/17
CRDT- 2016/10/18 06:00
PHST- 2016/06/17 00:00 [received]
PHST- 2016/09/08 00:00 [accepted]
PHST- 2016/10/18 06:00 [entrez]
PHST- 2016/10/18 06:00 [pubmed]
PHST- 2016/10/18 06:01 [medline]
PHST- 2016/10/17 00:00 [pmc-release]
AID - srep35048 [pii]
AID - 10.1038/srep35048 [doi]
PST - epublish
SO  - Sci Rep. 2016 Oct 17;6:35048. doi: 10.1038/srep35048.