A contactless positioning system for monitoring discontinuities in three dimensions with geological and geotechnical applications

Rinaldi-Montes, N.; Rowberry, Matthew David; Frontera, C.; Baroň, I.; Garcés, G.; Blahůt, Jan; Pérez-López, R.; Pennos, C.; Martí, Xavier

doi:https://dx.doi.org/10.1063/1.4993925

Number of the records: 1

A contactless positioning system for monitoring discontinuities in three dimensions with geological and geotechnical applications

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SYSNO ASEP	0481700
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	A contactless positioning system for monitoring discontinuities in three dimensions with geological and geotechnical applications
Author(s)	Rinaldi-Montes, N. (ES) Rowberry, Matthew David (USMH-B)_{RID, ORCID, SAI} Frontera, C. (ES) Baroň, I. (AT) Garcés, G. (ES) Blahůt, Jan (USMH-B)_{RID, ORCID, SAI} Pérez-López, R. (ES) Pennos, C. (GR) Martí, Xavier (FZU-D)_{RID, ORCID}
Article number	074501
Source Title	Review of Scientific Instruments. - : AIP Publishing - ISSN 0034-6748 Roč. 88, č. 7 (2017)
Number of pages	8 s.
Publication form	Print - P
Language	eng - English
Country	US - United States
Keywords	mechanical discontinuities ; contactless positioning system ; magnetoresistive sensing ; geotechnical engineering ; structural health monitoring
Subject RIV	JB - Sensors, Measurment, Regulation
OECD category	Environmental and geological engineering, geotechnics
Subject RIV - cooperation	Institute of Physics - Solid Matter Physics ; Magnetism
R&D Projects	LM2010008 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
Institutional support	USMH-B - RVO:67985891 ; FZU-D - RVO:68378271
UT WOS	000406773700031
EID SCOPUS	85025135985
DOI	10.1063/1.4993925
Annotation	In this paper, a contactless positioning system is presented which has been designed to monitor the kinematic behavior of mechanical discontinuities in three dimensions. The positioning system comprises a neodymium magnet, fixed on one side of a discontinuity, and a magnetoresistive sensing array, fixed on the opposing side. Each of the anisotropic magnetoresistive sensors in the sensing array records the magnetic field along three orthogonal directions. The positioning system intrinsically generates compact data packages which are transmitted effectively using a range of standard wireless telecommunication technologies. These data are then modeled using a global least squares fitting procedure in which the adjustable parameters are represented by the position and orientation of the neodymium magnet. The instrumental resolution of the positioning system can be tuned depending on the strength of the magnetic field generated by the neodymium magnet and the distance between the neodymium magnet and the magnetoresistive sensing array. For a typical installation, the displacement resolution is shown to be circa 10 mu m while the rotation resolution is circa 0.1 degrees. The first permanently deployed positioning system was established in June 2016 to monitor the behavior of an N-S trending fault located at the contact between the eastern Alps and the Vienna Basin. The robust design of the positioning system is demonstrated by the fact that no interruptions in the broadcasted data streams have occurred since its installation. It has a range of potential applications in many areas of basic and applied research including geology, geotechnical engineering, and structural health monitoring.
Workplace	Institute of Rock Structure and Mechanics
Contact	Iva Švihálková, svihalkova@irsm.cas.cz, Tel.: 266 009 216
Year of Publishing	2018

Number of the records: 1