Development of a Mobile Sensing Unit and Its Prototype Implementation  

作　　者：Yusuke Mizuno Yozo Fujino Keita Kataoka Yoshihiro Matsumoto 

机构地区：[1]Research Center for Environmental Safety, Yamaguchi University [2]Department of Civil Engineering, The University of Tokyo [3]Research and Development Center, East Japan Railway Company [4]Kansai Electric Power Co., Inc.

出　　处：《Tsinghua Science and Technology》2008年第S1期223-227,共5页清华大学学报（自然科学版（英文版）

基　　金：the joint research project between East Japan Railway Company and the University of Tokyo

摘　　要：This paper represents a design and development of a mobile sensing unit as well as its prototype implementation for railway track monitoring. The unit consists of an ultra-small personal computer (PC), a global positioning system (GPS) receiver, an accelerometer and an ADC (Analog/Digital Converter) so that the unit can trace the route while capturing an acceleration response of a passenger vehicle. The unit enables more frequent and qualitative data acquisition compared with traditional and the state of the practice railway track inspection equipments. Locating disorder is the key of our unit, which has a reasonable accuracy of positioning with GPS data, existing facilities landmarks, and car acceleration responses. The proposed unit is a promising device for efficient properties management of railway agencies. The prototype implementation shows a result that car acceleration responses are related with the track displacements in low frequencies. The results also imply that sensor settlement on a vehicle floor, not axes or bogies, is effective for capturing track vertical displacements.This paper represents a design and development of a mobile sensing unit as well as its prototype implementation for railway track monitoring. The unit consists of an ultra-small personal computer (PC), a global positioning system (GPS) receiver, an accelerometer and an ADC (Analog/Digital Converter) so that the unit can trace the route while capturing an acceleration response of a passenger vehicle. The unit enables more frequent and qualitative data acquisition compared with traditional and the state of the practice railway track inspection equipments. Locating disorder is the key of our unit, which has a reasonable accuracy of positioning with GPS data, existing facilities landmarks, and car acceleration responses. The proposed unit is a promising device for efficient properties management of railway agencies. The prototype implementation shows a result that car acceleration responses are related with the track displacements in low frequencies. The results also imply that sensor settlement on a vehicle floor, not axes or bogies, is effective for capturing track vertical displacements.

关 键 词：mobile sensing railway track monitoring INSTRUMENTATION data acquisition passenger vehicle global positioning system (GPS) 

分 类 号：U216.3[交通运输工程—道路与铁道工程]