Satellite-assisted determination of motor vehicle in covered area

Abstract

The invention relates to a position determination system for a motor vehicle (12) for determining whether the motor vehicle is in an area (14, 24) that is covered by a ceiling element of a building, comprising: a receiving unit (13) which is designed to receive navigation signals (Sig1, Sig2, Sig3, Sig4) from a plurality of satellites (Sat1, Sat2, Sat3, Sat4) of one or more global navigation satellite systems and to detect a temporal change of the signal strength of the respective navigation signals. An evaluation unit (15) determines line of sights (LoS1, LoS2, LoS3, LoS4) from the motor vehicle to the respective satellites, the navigation signals of which have been received, evaluates the temporal change of the signal strength of the respective navigation signals with respect to the respectively determined line of sight and determines the entry of the motor vehicle into the covered area by correlation of a driving movement (x) of the motor vehicle with the respective line of sights.The invention also relates to a motor vehicle (12) comprising such a position determination system. The invention further relates to a corresponding method.

Description

technical field [0001] The invention relates to a motor vehicle locating system according to the preamble of claim 1 for determining whether a motor vehicle is in an area covered by a roof element of a building. Furthermore, the invention relates to a motor vehicle with such a positioning system. Furthermore, the invention relates to a method according to the preamble of claim 10 . Background technique [0002] So far, Global Navigation Satellite System (GNSS) is mainly used for navigation and positioning. In principle, such a system is based on the transit time measurements of different satellites. At least four satellites must be visible at any one time to reliably unambiguously locate. Here, the receiver can determine its own position from the positions of the satellites and the signal propagation times. [0003] To detect roofs, ie roofs, distance-sensing sensors are usually used which are oriented upwards and can thus directly determine whether there is an obstacle ...

AI Technical Summary

Problems solved by technology

[0008] However, this method has the disadvantage that it relies on existing road network database correlations and is only suitable for correspondingly extended buildings, such as tunnels, in which the disconnection of the GPS signal and the associated, predetermined signal quality The low (as described in DE 10 2007 020 434 A1) is very suitable for reliable identification of entering tunnels

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