Patent ID: 8880342

Claim:
A moving body position detection system comprising: a dead reckoning navigation information acquisition unit that acquires dead reckoning navigation information including a direction of a moving body; a position identification unit that identifies a position of the moving body based on the dead reckoning navigation information on the moving body; a position prediction unit that predicts a predicted position at which the moving body is to arrive after an elapse of a predetermined interval from the position of the moving body, identified by the position identification unit, based on the dead reckoning navigation information on the moving body; a direction angle calculation unit that calculates a difference direction angle that is an angular difference between a direction from the position of the moving body, identified by the position identification unit, to the predicted position and the direction of the moving body; a direction angle correction unit that corrects the difference direction angle if the difference direction angle is equal to or larger than a threshold; and a position update unit that updates the position of the moving body, identified by the position identification unit, based on the difference direction angle.