2010.10.27 ITS World Congress
Extensional Smartphone Probe For Road Bump Detection
When a wide area disaster like an earthquake is occurred, an immediate monitoring and sharing of traffic situation and road condition are important for the quick rescue operation at disaster area. A road bump is one kind of conditions which is needed to an immediate monitoring and sharing. But currently, because of a road bump detection is done by human visual confirmation and a mechanical measuring of road surface shapes using profile meter, it need to use many human resources, long lead time and special equipment. In this paper, a road bump detection method is proposed that can be done more easily, which is named BumpRecorder. That is one kind of a extensional smartphone probe which is a smartphone only put on a vehicle dashboard, and the vehicle is driven as usual. At first, for a prototype BumpRecorder which is used pedometer, a bump detection principle and actual measurement result are explained which was measured at the Niigataken Chuetsu-oki Earthquake in 2007. And next, for the first generation BumpRecorder which is used three-dimensional accelerometer that is installed on a smartphone, bump detection logic and an experiment result are explained. At last, for the second generation BumpRecorder which is used three-dimensional gyro sensor is explained.