Wertewandel im Erwachsenenalter

Fengler, Jörg; Pampuch, Fiona

doi:10.13109/erbi.2016.62.4.163

Cited by 1 publication

(2 citation statements)

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“…The sensor system presented in [29] is equipped with an acceleration sensor on the switch nose and an inductive unit, which is used to measure the speed of the train. This data can be used to determine the contact position of wheels on the nose.…”

Section: Track-side Acceleration Measurement Systems Tailored To Swit...mentioning

confidence: 99%

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Analysis of Local Track Discontinuities and Defects in Railway Switches Based on Track-Side Accelerations

Reetz,

Najeh,

Lundberg

et al. 2024

Sensors

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Switches are an essential, safety-critical part of the railway infrastructure. Compared to open tracks, their complex geometry leads to increased dynamic loading on the track superstructure from passing trains, resulting in high maintenance costs. To increase efficiency, condition monitoring methods specific to railway switches are required. A common approach to track superstructure monitoring is to measure the acceleration caused by vehicle track interaction. Local interruptions in the wheel–rail contact, caused for example by local defects or track discontinuities, appear in the data as transient impact events. In this paper, such transient events are investigated in an experimental setup of a railway switch with track-side acceleration sensors, using frequency and waveform analysis. The aim is to understand if and how the origins of these impact events can be distinguished in the data of this experiment, and what the implications for condition monitoring of local track discontinuities and defects with wayside acceleration sensors are in practice. For the same experimental configuration, individual impact events are shown to be reproducible in waveform and frequency content. Nevertheless, with this track-side sensor setup, the different types of track discontinuities and defects (squats, joints, crossing) could not be clearly distinguished using characteristic frequencies or waveforms. Other factors, such as the location of impact event origin relative to the sensor, are shown to have a much stronger influence. The experimental data suggest that filtering the data to narrow frequency bands around certain natural track frequencies could be beneficial for impact event detection in practice, but differentiating between individual impact event origins requires broadband signals. A multi-sensor setup with time-synchronized acceleration sensors distributed over the switch is recommended.

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Section: Track-side Acceleration Measurement Systems Tailored To Swit...mentioning

confidence: 99%

“…Thus, track-side acceleration sensor systems that are specifically dedicated to condition monitoring of the crossing (cf. [29]) and that are mounted directly to or close to the crossing seem justified. Acceleration data measured at this point of the switch are naturally dominated by the impacts of wheels on the crossing.…”

Section: Crossingmentioning

confidence: 99%