Real-Time Monitoring of Structure Movements Using Low-Cost, Wall-Mounted, Hand-held RTK-GNSS Receivers

So Takahashi, Nobuaki Kubo, Norihiro Yamaguchi, Takashi Yokoshima

Abstract:	It is useful and innovative to monitor the displacement of structures caused by seismic shaking and landslides irrespective of observation points by using a single piece of equipment to collect data for some construction companies, research institutes and so on. Global Navigation Satellite System (GNSS) receivers and antenna on the roof of a steel tower to monitor the displacement of a structure (caused by wind, other natural elements, etc.) have already been reported in Japan, but our study is the first study on low-cost GNSS systems that can be attached to the walls of a building to monitor movement. Specifically, this research focuses on the real-time monitoring of structure movement using wall-mounted, hand-held Real-Time Kinematic GNSS (RTK-GNSS) receivers. Generally, it is not easy to set the antenna on the roof of buildings, so this approach attempting to attach the antenna to the wall has an advantage of the aspect of the readily installing. RTK positioning is normally performed using expensive, dual-frequency, geodetic-level receivers and antennas because it is commonly used in surveying world. However, aside from its high cost, this type of equipment is not easy to procure. This study addresses this problem using a low-cost, single-frequency, consumer-level receiver, which produces comparable centimeter-level results. The methods presented use horizontal spread and statistical values to determine positioning results. Our work on the proposed monitoring system, with its robust RTK improvement method, will serve as a reference for monitoring the fluctuations and movements of structures in the fields of architecture, construction and so on.
Published in:	Proceedings of the 31st International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2018) September 24 - 28, 2018 Hyatt Regency Miami Miami, Florida
Pages:	2074 - 2086
Cite this article:	Takahashi, So, Kubo, Nobuaki, Yamaguchi, Norihiro, Yokoshima, Takashi, "Real-Time Monitoring of Structure Movements Using Low-Cost, Wall-Mounted, Hand-held RTK-GNSS Receivers," Proceedings of the 31st International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2018), Miami, Florida, September 2018, pp. 2074-2086. https://doi.org/10.33012/2018.16021
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