Method and device for ascertaining a navigation position of a navigation system for a motor vehicle, and navigation system

Patent metadata

Field	Value
Publication number	US-11294069-B2
Application number	US-201716469734-A
Country	US
Kind code	B2
Filing date	Dec 11, 2017
Priority date	Dec 16, 2016
Publication date	Apr 5, 2022
Grant date	Apr 5, 2022

Abstract

The invention relates to a navigation system for a motor vehicle for ascertaining a navigation position, having: a plurality of receivers for receiving respective position data of a plurality of different navigation satellite systems, an inertial measuring unit for ascertaining an inertial position of the navigation system, a receiving unit for receiving correction data, an additional receiving unit for receiving certified position data, a device which is coupled to the plurality of receivers, the inertial measuring unit, the receiving unit, and the additional receiving unit so as to transmit signals, wherein the device is designed to ascertain the navigation position on the basis of the position data, the inertial position, the correction data, and the certified position data. The invention additionally relates to a method which can be carried out by the navigation device in particular.

First claim

The invention claimed is:

1. A device for a motor vehicle, said device being designed to carry out operations for ascertaining a navigation position of a navigation system for a motor vehicle, the operations comprising:
receiving respective position data of a plurality of different navigation satellite systems,
ascertaining a respective position of the navigation system based on the position data,
ascertaining a deviation of the respective positions from one another,
ascertaining the navigation position based on the respective positions if the deviation is less than a predefined threshold for the deviation,
ascertaining an inertial position of the navigation system by means of an inertial measuring unit,
ascertaining a second deviation of at least one of the positions ascertained based on the position data from the inertial position,
ascertaining the navigation position based on the at least one position if the second deviation is less than a predefined threshold for the second deviation,
receiving respective correction data for the plurality of navigation satellite systems,
ascertaining the navigation position based on the received correction data,
receiving certified position data of one of the navigation satellite systems,
ascertaining a certified position of the navigation system based on the certified position data,
ascertaining the navigation position based on the certified position,
ascertaining respective deviations from in each case two positions of the respective positions,
if the respective deviation is greater than the predefined threshold for the deviation:
ascertaining the respective two navigation satellite systems from which the two position data were received from which the two positions were each ascertained,
if a first navigation satellite system of the navigation satellite systems is always one of the two navigation satellite systems,
ascertaining the navigation position independently of the position data which are received from the first navigation satellite system,
invalidating the navigation position if the navigation position was ascertained based on the position data which were received from the first navigation satellite system,
wherein ascertaining the inertial position comprises:
ascertaining a course of inertial positions by means of the inertial measuring unit,
if the second deviation is greater than the threshold for the second deviation,
ascertaining the navigation position independently of the position data from which the at least one position was ascertained,
invalidating the navigation position if the navigation position was ascertained based on the position data from which the at least one position was ascertained,
ascertaining a plurality of inertial positions of the navigation system by means of a plurality of inertial measuring units,
ascertaining a plurality of second deviations of in each case at least one of the positions ascertained based on the position data for the respective inertial positions of the plurality of inertial positions,
ascertaining the navigation position based on the at least one position if the second deviation is in each case less than the predefined threshold for the second deviation,
receiving respective correction data from at least a first and a second data provider, which are different from each other,
comparing the correction data of the first data provider with the correction data of the second data provider,
if the correction data deviate from one another by more than a predefined tolerance:
invalidating the navigation position if the navigation position was ascertained based on the correction data which were received from the first and/or the second data provider, and/or
ascertaining the navigation position independently of the correction data from the first and/or the second data provider.

Assignees

• Continental Automotive Gmbh

Inventors

• Mattmueller Karsten
• Schmidt Helmut

Classifications

• G01S19/49

  whereby the further system is an inertial position system, e.g. loosely-coupled · CPC title

• G01S19/426

  by combining or switching between position solutions or signals derived from different modes of operation in a single system · CPC title

• G01S19/41

  Differential correction, e.g. DGPS [differential GPS] · CPC title

• G01S19/20 Primary

  Integrity monitoring, fault detection or fault isolation of space segment · CPC title

• G01S19/423

  by combining or switching between position solutions derived from different satellite radio beacon positioning systems · CPC title