紀要論文

手に保持された端末による歩行状態及び移動経路推定

Walking State and Position Tracking using Mobile Handheld Devices

jpn

18810667

https://doi.org/10.15002/00010527

法政大学大学院情報科学研究科

9

89

94

2014-03

Version of Record

GPS becomes a common technology for tracking the position of outdoor users. It uses radio waves from the satellites on detecting a position, and therefore, it is hard to use it for indoor. Some methods using inertial sensors are developed for indoor position tracking. However, they work only for the movement on a single floor. They also require to fix the specific sensors on body strictly to get the stable outputs from them. In this paper, we use the inertial sensors of smartphones which become popular now. No extra sensor is required for this method using accelerometer equipped on common smartphones. One problem on using the sensor on the handheld smartphone, values always fluctuate with movement. We propose a user's position tracking method which cooperates with the walking state estimation. In our method, the parameters used on the position tracking depend on the three walking states, walking the flat passage way, going up the stairs and going down the stairs. LPC cepstrum is used to analyze the output of the accelerom- eter, then determine the walking state using the sensor fusion. Finally, walking steps and distance are estimated from the values of the specific axis.

Article

AA12222297