Robustness of contact-less optical method, used for measuring contact wire position in changeable lighting conditions

Skibicki, Jacek

doi:10.17559/tv-20151022121953

Cited by 1 publication

(2 citation statements)

References 13 publications

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“…In order to process recorded images, authors developed original software using the LabVIEW environment. Typical analysis modules were used for image processing, i.e., thresholding, partial filtration and dilation [ 42 , 43 , 44 ]. Digital filtering of the raw measurement results was performed by using the Whittaker algorithm [ 45 ].…”

Section: Experimental Test Standmentioning

confidence: 99%

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Novel Vision Monitoring Method Based on Multi Light Points for Space-Time Analysis of Overhead Contact Line Displacements

Wilk

Gelman

Skibicki

et al. 2022

Sensors

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The article presents an innovative vision monitoring method of overhead contact line (OCL) displacement, which utilizes a set of LED light points installed along it. A light point is an, LED fed from a battery. Displacements of the LED points, recorded by a camera, are interpreted as a change of OCL shape in time and space. The vision system comprises a camera, properly situated with respect to the OCL, which is capable of capturing a dozen light points in its field of view. The monitoring system can be scaled by increasing the number of LED points and video cameras; thus, this method can be used for monitoring the motion of other large-size objects (e.g., several hundred meters). The applied method has made it possible to obtain the following novel results: vibration damping in a contact wire is nonlinear by nature and its intensity depends on the wire vibration amplitude; the natural frequency of contact wire vibration varies, and it is a function of vibration amplitude; the natural frequency of contact wire vibration also depends on the wire temperature. The proposed method can be used to monitor the uplift of contact and messenger wires in laboratory conditions, or for experimental OCL testing, as well as for verifying simulation models of OCL.

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Section: Experimental Test Standmentioning

confidence: 99%

“…The code has been optimized to ensure good computation performance on a standard PC platform. Detailed information related to the applied image processing algorithm can be found in [ 42 , 43 , 44 ].…”

Section: Experimental Test Standmentioning

confidence: 99%