Measurement of Longitudinal Irregularities on Rails Using an Axlebox Accelerometer System

摘要

Axlebox accelerometer (ABA) systems offer a means of measuring or monitoring the longitudinal profile of track at a relatively high speed over the wavelength range associated with corrugation: typically 10-1000 mm. There is little or no published data on the use of ABA systems for measuring longer wavelengths, in particular 1000-3000 mm. This paper provides data from one ABA system which was mounted in a road-rail vehicle that was used as a track recording car. Repeatability and accuracy are assessed in a similar and novel way that has not previously been presented in the literature. Both are shown to be quite acceptable throughout the wavelength range 10-3000 mm, with a correlation coefficient exceeding 0.9 for both repeatability and accuracy.