| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To accurately determine the travel direction of a mobile body. <P>SOLUTION: In a travel direction determination device 100, a positioning point selection part 140b selects positioning points Qa, Qb, Qc, Qd. The distance between the positioning point Qa and the positioning point Qb is equal to or more than a search distance Th2. The distance between the positioning point Qa and the positioning point Qd is equal to or more than the search distance Th2. The distance between the positioning point Qd and the positioning point Qc is equal to or more than a search distance Th4. An angle calculation part 140c calculates an angle between a linear line through the positioning point Qa and Qb and a linear line through the positioning point Qc and the positioning point Qd, and a travel direction determination unit 140d determines a travel direction on the basis of the angle. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
