A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Development of a time-frequency approach to quantify railroad ballast fouling condition using ultra-wide band ground-penetrating radar data
This paper discusses the use of ground-penetrating radar (GPR) to assess railroad track substructure conditions. An ultra-wide band (UWB) GPR system, having a centre frequency at or higher than 2 GHz, can be used to detect the scattering pattern and to predict air void volume in railroad ballast. A time-frequency technique was implemented to characterise the signal in time and frequency domains simultaneously. Because electromagnetic energy attenuation is highly frequency dependent, the frequency sub-bands of the reflected UWB GPR signal can be analysed separately to quantify the fouling material and quantify moisture content. Additionally, to validate the GPR system capability, a ground truth field survey was conducted. Using ballast samples collected from the field for validation, this paper shows that a time-frequency analysis may provide a new method to measure the thickness of clean ballast, detect the trapped water and assess the ballast fouling and moisture content along the track.
Development of a time-frequency approach to quantify railroad ballast fouling condition using ultra-wide band ground-penetrating radar data
This paper discusses the use of ground-penetrating radar (GPR) to assess railroad track substructure conditions. An ultra-wide band (UWB) GPR system, having a centre frequency at or higher than 2 GHz, can be used to detect the scattering pattern and to predict air void volume in railroad ballast. A time-frequency technique was implemented to characterise the signal in time and frequency domains simultaneously. Because electromagnetic energy attenuation is highly frequency dependent, the frequency sub-bands of the reflected UWB GPR signal can be analysed separately to quantify the fouling material and quantify moisture content. Additionally, to validate the GPR system capability, a ground truth field survey was conducted. Using ballast samples collected from the field for validation, this paper shows that a time-frequency analysis may provide a new method to measure the thickness of clean ballast, detect the trapped water and assess the ballast fouling and moisture content along the track.
Development of a time-frequency approach to quantify railroad ballast fouling condition using ultra-wide band ground-penetrating radar data
Al-Qadi, Imad L. (author) / Xie, Wei (author) / Jones, Douglas L. (author) / Roberts, Roger (author)
International Journal of Pavement Engineering ; 11 ; 269-279
2010-08-01
11 pages
Article (Journal)
Electronic Resource
English
| British Library Online Contents | 2008
Quantification of railroad ballast condition using ground penetrating radar data
| Tema Archive | 2006
| British Library Online Contents | 2012