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Sensors 2018, 18(1), 224; https://doi.org/10.3390/s18010224

Design and Testing of a Flexible Inclinometer Probe for Model Tests of Landslide Deep Displacement Measurement

1
Faculty of Engineering, China University of Geosciences, Wuhan 430074, China
2
School of Mechanical Engineering and Electronic Information, China University of Geosciences, Wuhan 430074, China
*
Authors to whom correspondence should be addressed.
Received: 3 October 2017 / Revised: 25 December 2017 / Accepted: 11 January 2018 / Published: 14 January 2018
(This article belongs to the Section Physical Sensors)
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Abstract

The physical model test of landslides is important for studying landslide structural damage, and parameter measurement is key in this process. To meet the measurement requirements for deep displacement in landslide physical models, an automatic flexible inclinometer probe with good coupling and large deformation capacity was designed. The flexible inclinometer probe consists of several gravity acceleration sensing units that are protected and positioned by silicon encapsulation, all the units are connected to a 485-comunication bus. By sensing the two-axis tilt angle, the direction and magnitude of the displacement for a measurement unit can be calculated, then the overall displacement is accumulated according to all units, integrated from bottom to top in turn. In the conversion from angle to displacement, two spline interpolation methods are introduced to correct and resample the data; one is to interpolate the displacement after conversion, and the other is to interpolate the angle before conversion; compared with the result read from checkered paper, the latter is proved to have a better effect, with an additional condition that the displacement curve move up half the length of the unit. The flexible inclinometer is verified with respect to its principle and arrangement by a laboratory physical model test, and the test results are highly consistent with the actual deformation of the landslide model. View Full-Text
Keywords: landslide model test; displacement monitoring; flexible inclinometer probe; accelerometer; three-spline interpolation landslide model test; displacement monitoring; flexible inclinometer probe; accelerometer; three-spline interpolation
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Zhang, Y.; Tang, H.; Li, C.; Lu, G.; Cai, Y.; Zhang, J.; Tan, F. Design and Testing of a Flexible Inclinometer Probe for Model Tests of Landslide Deep Displacement Measurement. Sensors 2018, 18, 224.

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