1996 Volume 20 Issue 46 Pages 85-92
In this study, a tracking system for walkers using digital portable telephones is considered. A walker's system that consists of a terrestrial magnetic sensor. a pedometer and a microcomputer computes the position of the walker. And its positional information is transmitted to the tracking center using portable telephones. It is difficult to detect the position using the GPS in the places like bustling streets and underground markets, because the GPS can not receive signals from more than four satellites there. On the other hand the results of some walking experiments in the proposed system, show that this system can track the walker there. And we make clear the usefuluess of this system for the tracking of the wandering elderly. But it is necessary to simplify this walker's system for the practical use.
