Abstract
Trams are the most durable and resource efficient forms of public transportation. However, because of the varying wear in dependence on their operation mode and load levels, there is a need for condition monitoring and early maintenance. Vibration sensors provide interesting possibilities to monitor the relevant tram drive components. In this contribution we investigate their use under real conditions. On the basis of cable bound vibration measurements, the influence of the crossed track section, the tram speed and the tram condition is shown. Based on the investigation results, a concept is proposed in which a meshed and wireless sensor network, event-triggered, can acquire vibration measurement data, which are suitable for the diagnosis of tram drive components. The proposed concept has the potential to operate the sensor nodes in an energy efficient way through decentralized data evaluation taking place on the sensor node.
Highlights
For urban mobility, trams offer many advantages in terms of environmental protection [1], health care [2] and modern urban and transport planning [3]
Vibration based measurements in trams provide interesting possibilities for condition monitoring of the drive components. The influencing factors such as tram speed, crossed rail sections and tram condition were investigated under real conditions
Based on the results of the vibration measurements, a concept was developed for the reliable assessment of the tram condition using meshed and autonomous sensor nodes
Summary
Trams offer many advantages in terms of environmental protection [1], health care [2] and modern urban and transport planning [3]. [4,5,6,7] show the essential aspects and advantages of autonomous and energy efficient sensor networks in trams compared to conventional (cable bound) measurements. In this context, there are restrictions in the feasibility of vibration tests. CONCEPT FOR AN EVENT-TRIGGERED WIRELESS SENSOR NETWORK FOR VIBRATION-BASED DIAGNOSIS IN TRAMS.
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