GPS System for determining reliability level of GPS information and providing method thereof

摘要

A reliability level determination system of GPS information capable of determining a reliability level of GPS information output from a GPS device mounted on a mobile object such as a vehicle by comparing information provided by the GPS device with information of the traveling record system and the inertial measurement device And a method of providing the same. According to an aspect of the present invention, there is provided a system for determining a reliability level of GPS information for determining a reliability level of GPS information output from a GPS device mounted on a mobile device, module; A first speed change amount calculating module for calculating a first comparison speed change amount corresponding to each GPS information from GPVTG information included in each GPS information for each received GPS information; A second speed change amount calculating module that calculates, for each of the received GPS information, a second comparison speed change amount corresponding to each GPS information based on information periodically outputted from an odometer mounted on the mobile body; A first azimuth change amount calculating module for calculating a first comparison azimuth change amount corresponding to each GPS information from GPVTG information included in each GPS information for each received GPS information; A second azimuth change amount calculating unit for calculating a second azimuth change amount corresponding to each GPS information based on information periodically outputted from an inertial measurement unit mounted on the mobile unit, Output module; And a difference value between a first comparison object speed change amount and a second comparison object speed change amount corresponding to each of latest GPS information most recently outputted from the GPS device and at least one past GPS information outputted before the latest GPS information, And a control module for determining a confidence level of the latest GPS information based on the difference between the first comparison target azimuth change amount and the second comparison target azimuth change amount corresponding to each of the latest GPS information and the at least one past GPS information A system for judging the reliability level of the GPS information is provided.