車上測定データによる軌道の異常検出 : 第2報,プローブシステムの開発と検証(機械力学,計測,自動制御)

概要

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Conditions of railway track have conventionally been maintained with exclusive inspection vehicle. If the conditions of the track can be inspected by using service vehicles with condition monitoring system, more efficient maintenance would be possible. This paper describes the development and the verification of the "probe system" which estimates the track conditions without sensors on bogie. To detect the track conditions from the data which can be observed in the interior of a service vehicle, two methods have been proposed: the method to detect track irregularities using RMS of the lateral/vertical accelerations and the rolling of the vehicle body, and the method to detect rail corrugations from the interior noise using the windowed Furrier transform. The probe system including two proposed methods has been developed which is composed by an accelerometer, a rate gyroscope and a microphone for detection of track conditions; a GPS for the localization; and notebook PC for the analysis. The developed system has been installed onto the cab of a service vehicle to carry out a field test for the validation of the system. The results of comparison with the ground data show that the probe system can estimate effectively the amplitude of track irregularities, the grade of rail corrugations and its location.
2009-06-25