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Article

New Hydraulic Sensor for Distributed and Automated Displacement Measurements with Temperature Compensation System

1
Department of Mechanics and Vibroacoustics, Faculty of Mechanical Engineering and Robotics, AGH University of Science and Technology in Krakow, Mickiewicza 30, 30-059 Krakow, Poland
2
Reinforced Concrete Structures Division, Faculty of Civil Engineering, Cracow University of Technology, Warszawska 24, 31-155 Krakow, Poland
3
Menard Polska Sp. z o.o., Powązkowska 44c, 01-797 Warsaw, Poland
4
SHM System Sp. z o.o., Sp. kom., Libertów, ul. Jana Pawła II 82A, 30-444 Kraków, Poland
*
Author to whom correspondence should be addressed.
Academic Editors: Jaroslaw Rybak, Marian Drusa and Andrea Segalini
Sensors 2021, 21(14), 4678; https://doi.org/10.3390/s21144678
Received: 31 May 2021 / Revised: 28 June 2021 / Accepted: 1 July 2021 / Published: 8 July 2021
(This article belongs to the Special Issue Sensors and Measurements in Geotechnical Engineering)
Structural health monitoring (SHM) is a challenging task, especially in the context of ground and geotechnical structures. They are characterized by a set of random mechanical parameters, depending on the location but also changing with external conditions (such as humidity or temperature) over time. Theoretical predictions and results of numerical simulations are, therefore, considerably uncertain. On the other hand, measurements aimed at improving construction and operation of such structures are very often performed only in selected points, which significantly increases the risk of data misinterpretation. Reliable measurement data related to structural condition are of the great importance because they allow for improvement of work quality but also reduce construction time and, thereby, save money. That is why scientists and engineers are still searching for new measurement solutions to overcome existing limitations. The purpose of the study is to present the design and practical application of a new hydraulic sensor dedicated to vertical displacement sensing. The novelty of the presented solution lies in several features, including the possibility of performing automatic measurements and compensating the results due to temperature effects. The article describes the sensor’s design, including the concept of a thermal compensation system and example results from laboratory tests, where the sensor’s performance was investigated in a dual-zone thermal chamber. Finally, the sensor was installed within the field conditions under an embankment constructed above the improved substrate. Example results verified by reference distributed fiber optic technique are presented and discussed hereafter, raising high prospects in the context of possible structural health monitoring applications of the new solution. View Full-Text
Keywords: hydraulic sensor; displacements; settlements; measurements; temperature; thermal compensation; embankment; laboratory; distributed sensing; DFOS hydraulic sensor; displacements; settlements; measurements; temperature; thermal compensation; embankment; laboratory; distributed sensing; DFOS
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MDPI and ACS Style

Bednarski, Ł.; Sieńko, R.; Kanty, P.; Howiacki, T. New Hydraulic Sensor for Distributed and Automated Displacement Measurements with Temperature Compensation System. Sensors 2021, 21, 4678. https://doi.org/10.3390/s21144678

AMA Style

Bednarski Ł, Sieńko R, Kanty P, Howiacki T. New Hydraulic Sensor for Distributed and Automated Displacement Measurements with Temperature Compensation System. Sensors. 2021; 21(14):4678. https://doi.org/10.3390/s21144678

Chicago/Turabian Style

Bednarski, Łukasz, Rafał Sieńko, Piotr Kanty, and Tomasz Howiacki. 2021. "New Hydraulic Sensor for Distributed and Automated Displacement Measurements with Temperature Compensation System" Sensors 21, no. 14: 4678. https://doi.org/10.3390/s21144678

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