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Mathematical Problems in Engineering
Volume 2016, Article ID 2132454, 10 pages
http://dx.doi.org/10.1155/2016/2132454
Research Article

Evaluation of Bus Vibration Comfort Based on Passenger Crowdsourcing Mode

1School of Computer and Communication, Lanzhou University of Technology, Lanzhou 730050, China
2Department of Mathematics and Computer Science, Fort Valley State University, Fort Valley, GA 31030, USA

Received 26 January 2016; Accepted 24 March 2016

Academic Editor: Yongjun Shen

Copyright © 2016 Hong Zhao et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Vibration comfort is an important factor affecting the quality of service (QoS) of bus. In order to make people involved in supervising bus’s vibration comfort and improve passengers’ riding experience, a novel mode of passenger crowdsourcing is introduced. In this paper, comfort degree of bus vibration is calculated from bus’s vibration signals collected by passengers’ smartphones and sent through WiFi to the Boa web server which shows the vibration comfort on the LCD deployed in bus and maybe trigger alarm lamp when the vibration is beyond the threshold. Three challenges here have been overcome: firstly, space coordinate transformation algorithm is used to solve the constant drift of signals collected; secondly, a low-pass filter is designed to isolate gravity from signals real-timely via limited computing resources; thirdly, an embedded evaluation system is developed according to the calculation procedure specified by criterion ISO 2631-1997. Meanwhile, the model proposed is tested in a practical running environment, the vibration data in whole travel are recorded and analyzed offline. The results show that comfort degree of vibration obtained from the experimental system is identical with the truth, and this mode is proved to be effective.