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Open AccessArticle

Satellite-Based Wireless Sensor Development and Deployment Studies for Surface Wave Testing

by Pengju Xu 1,† and Wentao Wang 2,*,†
1
Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education, Harbin Institutive of Technology, Harbin 150090, China
2
Department of Civil and Environmental Engineering, University of Michigan, Ann Arbor, MI 48109-2125, USA
*
Author to whom correspondence should be addressed.
These two authors contributed equally to this work.
Sensors 2019, 19(20), 4364; https://doi.org/10.3390/s19204364
Received: 24 July 2019 / Revised: 30 August 2019 / Accepted: 11 September 2019 / Published: 9 October 2019
(This article belongs to the Special Issue Sensors Based NDE and NDT)
Although cable-based seismic sensing systems have provided reliable data in the past several decades, they become a bottleneck for large-area monitoring and critical environmental (volcanic eruptions) sensing because of their cost, difficulty in deploying and expanding, and lack of accurate three-dimensional geographic information. In this paper, a new wireless sensing system is designed consisting of a portable satellite device, a self-sustaining power source, a low-cost computational core, and a high-precision sensor. The emphasis of this paper is to implement in low-cost hardware without requirements of highly specialized and expensive data acquisition instruments. Meanwhile, a computational-core-embedded algorithm based on compressive sensing (CS) is also developed to compress data size for transmission and encrypt the measured data preventing information loss. Seismic data captured by the accelerometer sensor are coded into compressive data packages and then transferred via satellite communication to a cloud-based server for storage. Acceleration and GPS information is decrypted by the ℓ1-norm minimization optimization algorithm for further processing. In this research, the feasibility of the proposed sensing system for the acquisition of seismic testing is investigated in an outdoor field surface wave testing. Results indicate the proposed low-cost wireless sensing system has the capability of collecting ground motions, transferring data, and sharing GPS information via satellite communication for large area monitoring. In addition, it has a great potential of recovering measurements even with significant data package loss. View Full-Text
Keywords: wireless sensing; embedded data processing; GPS; surface wave test; Rayleigh wave; compressive sampling; nondestructive testing/evaluation wireless sensing; embedded data processing; GPS; surface wave test; Rayleigh wave; compressive sampling; nondestructive testing/evaluation
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Xu, P.; Wang, W. Satellite-Based Wireless Sensor Development and Deployment Studies for Surface Wave Testing. Sensors 2019, 19, 4364.

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