Title:
Sensing Sheet for Damage Detection Over Large Surfaces of Structures
Author(s):
Glisic
Publication:
Web Session
Volume:
Issue:
Appears on pages(s):
Keywords:
DOI:
Date:
10/23/2022
Abstract:
Currently available strain sensors are either discrete or 1D distributed. The discrete sensors, short- or long-gauge, are not suitable for fine grain damage detection over large areas of structures as they either provide severely insufficient spatial-resolution and rely on complex algorithms that degrade specificity against practical environmental conditions or require expensive solutions involving large number of sensors. 1D distributed sensors improve spatial resolution but remain expensive if coverage of large areas of structure is required. Sensing Sheet is novel 2D quasi-distributed sensor that addresses the challenge of achieving high spatial resolution in damage detection, yet keeping the costs limited. It is based on dense arrays of resistive strain sensors patterned on large-area substrate and combined with wireless integrated circuits for sensor readout, data processing, and energy management. At the current state, the components of sensing sheets were developed, and its prototype tested in lab and on a real structure – Streicker Bridge on Princeton University campus. This presentation provides overview on the current state of development of the Sensing Sheet, including the functioning principle, components, data analysis algorithms, and lab and field test results.