Map matching system of integrated vehicle navigation in cave, and error correction method thereof

Abstract

The invention discloses a map matching system of integrated vehicle navigation in a cave, and an error correction method thereof. The map matching system comprises a cave map database and a map matching unit; the map matching unit comprises a data receiving unit, a data solution unit, a data matching unit, a data fusion unit, a data output unit, a data storage unit and a data display unit; the mapdatabase comprises the first general table and several sub-tables; the data receiving unit receives data of integrated navigation; the data solution unit performs solution; the data matching unit completes matching of the integrated navigation and the map database, and performs error correction on the position information output by the integrated navigation; and finally, the data fusion unit outputs, stores and displays data after fusing the data. Thereby, the problem that the position information precision is poor in a condition that the vehicle navigation loses a GPS signal in a cave and tunnel can be solved; a matching algorithm having a two-layer nested structure is adopted; and the method has the advantages of being good in real-time performance, high in precision, low in cost and the like.

Description

technical field [0001] The invention belongs to the field of vehicle navigation, and in particular relates to a map matching system for vehicle integrated navigation in a cave and an error correction method thereof. Background technique [0002] In the development of human civilization, the research and development of navigation systems has a long history. In ancient times, people judged the location and direction by observing the sky, and later invented the compass. The legend about the compass in our country can be traced back to the Yanhuang period. With the advancement of science and technology, people's demand for location information is increasing; in the 1970s, the establishment of the United States' Global Positioning System (GPS) and the former Soviet Union's GLONAAS marked the gradual maturity of navigation and positioning technology. [0003] With the advancement of technology, many new vehicle navigation technologies such as integrated navigation have emerged. I...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a map matching system and an error correction method for vehicle integrated navigation in caves. When vehicle navigation loses GPS signals in caves and tunnels, the accuracy of position information is poor and the update is not timely.

Images