Patent ID: 9335171
Filing Date: 2016-05-10
CPC Classification: G01C,G01S

Claim Text:
1. A travel trace storage apparatus comprising: a location detection device for chronologically detecting a vehicle location based on an electric wave received from a satellite; a positioning trace generation device for generating a positioning trace, in which each of vehicle locations is chronologically arranged, each of vehicle locations having been measured by the location detection device; a movement distance detection device for chronologically detecting a vehicle movement distance; a travel direction detection device for chronologically detecting a vehicle travel direction; a dead reckoning trace generation device for generating a dead reckoning trace, in which each vector is chronologically arranged, each vector being determined by a corresponding vehicle movement distance detected by the movement distance detection device, and a respective vehicle travel direction being detected by the travel direction detection device; a correction positioning trace generation device for generating a correction positioning trace, which is obtained by removing a location that is distant from the dead reckoning trace by a predetermined distance or more from each of locations included in the positioning trace under a condition that the positioning trace generated by the positioning trace generation device is superposed on the dead reckoning trace generated by the dead reckoning trace generation device; a correction dead reckoning trace generation device for generating a correction dead reckoning trace, which is obtained by correcting the dead reckoning trace based on the correction positioning trace, the dead reckoning trace being generated by the dead reckoning trace generation device, and the correction positioning trace being generated by the correction positioning trace generation device; an absolute trace generation device for generating an absolute trace, which is obtained by synthesizing the correction positioning trace and the correction dead reckoning trace, the correction positioning trace being generated by the correction positioning trace generation device, and the correction dead reckoning trace being generated by the correction dead reckoning trace generation device; and an absolute trace memory for storing the absolute trace, which is generated by the absolute trace generation device.