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Open AccessArticle

A Track Geometry Measuring System Based on Multibody Kinematics, Inertial Sensors and Computer Vision

1
Department of Mechanical and Manufacturing Engineering, University of Seville, Seville 41092, Spain
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Department of Materials and Transportation Engineering, University of Seville, Seville 41092, Spain
*
Author to whom correspondence should be addressed.
Academic Editor: Felipe Jiménez
Sensors 2021, 21(3), 683; https://doi.org/10.3390/s21030683
Received: 22 December 2020 / Revised: 14 January 2021 / Accepted: 15 January 2021 / Published: 20 January 2021
This paper describes the kinematics used for the calculation of track geometric irregularities of a new Track Geometry Measuring System (TGMS) to be installed in railway vehicles. The TGMS includes a computer for data acquisition and process, a set of sensors including an inertial measuring unit (IMU, 3D gyroscope and 3D accelerometer), two video cameras and an encoder. The kinematic description, that is borrowed from the multibody dynamics analysis of railway vehicles used in computer simulation codes, is used to calculate the relative motion between the vehicle and the track, and also for the computer vision system and its calibration. The multibody framework is thus used to find the formulas that are needed to calculate the track irregularities (gauge, cross-level, alignment and vertical profile) as a function of sensor data. The TGMS has been experimentally tested in a 1:10 scaled vehicle and track specifically designed for this investigation. The geometric irregularities of a 90 m-scale track have been measured with an alternative and accurate method and the results are compared with the results of the TGMS. Results show a good agreement between both methods of calculation of the geometric irregularities. View Full-Text
Keywords: rail vehicles; track irregularities; multibody dynamics; inertial sensors; computer vision rail vehicles; track irregularities; multibody dynamics; inertial sensors; computer vision
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MDPI and ACS Style

Escalona, J.L.; Urda, P.; Muñoz, S. A Track Geometry Measuring System Based on Multibody Kinematics, Inertial Sensors and Computer Vision. Sensors 2021, 21, 683. https://doi.org/10.3390/s21030683

AMA Style

Escalona JL, Urda P, Muñoz S. A Track Geometry Measuring System Based on Multibody Kinematics, Inertial Sensors and Computer Vision. Sensors. 2021; 21(3):683. https://doi.org/10.3390/s21030683

Chicago/Turabian Style

Escalona, José L.; Urda, Pedro; Muñoz, Sergio. 2021. "A Track Geometry Measuring System Based on Multibody Kinematics, Inertial Sensors and Computer Vision" Sensors 21, no. 3: 683. https://doi.org/10.3390/s21030683

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