Measurement of dynamic vibration in cycling using portable terminal measurement system

Measurement of dynamic vibration in cycling using portable terminal measurement system

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Bicycling is a potential way to improve sustainable urban transportation system. However, the evaluation methods and metrics for bicycle ride quality and slow traffic pavement condition are still in the preliminary stages. The traditional bicycling vibration measurement used instrumented probe bicycle (IPB), which contains several independent devices and obtains scattering data. This method cannot show the detailed pavement condition. A technical challenge for monitoring real-time bicycling comfort and obtain the pavement condition in detail is to combine the intelligent transportation system (ITS) with bicycles. In this study, two schemes have been proposed to acquire the vibration data based on portable terminal measurement systems. Scheme (1) was based on the IPB using GPS, accelerometers, and sport cameras. The microcontroller was used to integrate several modules to develop scheme (2). Wavelet analysis was introduced to analyse random signal data. Then the pavement condition can be reflected in detail by vibration response. Data derived from the proposed system can be successfully applied to promote the use of bicycles as a reflecting tool for the pavement surface conditions. This method can provide a reference database for pavements’ surface maintenance and for cyclists to choose cycling routes.

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