Abstract
Civil infrastructure worldwide is subject to factors such as aging and deterioration. Structural health monitoring (SHM) can be used to assess the impact of these processes on structural performance. SHM demands have evolved from routine monitoring to real-time and autonomous assessment. One of the frontiers in achieving effective SHM systems has been the use of wireless smart sensors (WSSs), which are attractive compared to wired sensors, due to their flexibility of use, lower costs, and ease of long-term deployment. Most WSSs use accelerometers to collect global dynamic vibration data. However, obtaining local behaviors in a structure using measurands such as strain may also be desirable. While wireless strain sensors have previously been developed by some researchers, there is still a need for a high sensitivity wireless strain sensor that fully meets the general demands for monitoring large-scale civil infrastructure. In this paper, a framework for synchronized wireless high-fidelity acceleration and strain sensing, which is commonly termed multimetric sensing in the literature, is proposed. The framework is implemented on the Xnode, a next-generation wireless smart sensor platform, and integrates with the strain sensor for strain acquisition. An application of the multimetric sensing framework is illustrated for total displacement estimation. Finally, the potential of the proposed framework integrated with vision-based measurement systems for multi-point displacement estimation with camera-motion compensation is demonstrated. The proposed approach is verified experimentally, showing the potential of the developed framework for various SHM applications.
Highlights
Civil infrastructure plays a vital role in societal activities and economic development.many developed nations worldwide have invested heavily in such infrastructure.For instance, the United States recently introduced a new USD 1 trillion infrastructure bill to construct and maintain existing civil infrastructure
wireless smart sensors (WSSs) eliminate the need for cables through their wireless connection to a central unit, thereby allowing for fast deployment and flexibility of use [11–14]
The modal characteristics can be extracted from measured acceleration data that can inform the global condition of a structure
Summary
Civil infrastructure plays a vital role in societal activities and economic development. Won et al [27] recently developed a multimetric sensor board for strain and acceleration using the Xnode platform. Taking the PGA 900 IC as an example, while it possesses the basic features described it has an in-built microcontroller unit, has a higher cost and power consumption Despite these developments, there is still a need for a high sensitivity wireless strain sensor that fully meets the demands for monitoring large-scale civil infrastructure. Sensors 2022, 22, 1998 acceleration measurements; (ii) multimetric displacement estimation and its use for camera compensation without needing on a stationary using thetointegrate are:motion (i) development of strain acquisition a wirelessreference sensor platform integratewirewith less platform;measurements; and (iii) evaluation under realdisplacement world practical conditions. Framework enables high fidelity multimetric sensing of strain and acceleration
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