| 摘要 |
This invention concerns a pedestrian navigation system for using GIS in the area which is difficult to acquire GPS signal, which determines the user's position by calculating the horizontal and vertical displacement with the tilt angles of upper leg and lower leg, or by measuring the distance vector from the center of body to the foot which is determined by the arrival time differences of radio wave pulse and ultrasonic pulse transmitted from the foot when foot contacts with the ground, at each step during walking or running.
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