Research Concerning Characteristic Analysis of Moving Distance and Direction by Built-in Smart Phone Sensor

Abstract

Under circumstances out of the mountaineering path, climbers will lose sight of their current location or mountain trails when it becomes impossible to acquire location information from GNSS. Along with that, it will lead them to lose their path which is the maximum factor of distress. For deterring distress, it is necessary to gain a highly reliable movement trajectory at the time of straying. However, the location information acquired from GPS sensor of respective smart phones exhibits unevenness in the accuracy and contains plenty of noises since they differ from each other depending on the around environments or models. As a solution to this problem, a noise elimination method of GNSS in a smart phone has been proposed, but it is difficult to acquire continuous position information in mountainous areas where there are many obstacles such as trees. In this research, we developed a system to calculate moving distance and azimuth using other sensors built-in smart phone, and tried to apply it to assisting position positioning.