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Method for selecting locating algorithms in a vehicle

A positioning algorithm and vehicle technology, applied in satellite radio beacon positioning systems, navigation calculation tools, instruments, etc., to achieve the effect of convenient calculation, high performance and good performance

Active Publication Date: 2018-04-17
CONTINENTAL AUTOMOTIVE TECH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the different advantages of the respective sensors in different driving situations will not be discussed in detail here

Method used

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  • Method for selecting locating algorithms in a vehicle

Examples

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Effect test

example 1

[0078] If a parked state is detected, the position does not have to be calculated based on vehicle dynamics sensors (parked state vehicle is not moving). In other words, existing computing capabilities can be used to compute a position based on satellite navigation by means of Precise Point Positioning (PPP). As a result, an increasingly precise initial position can be determined for the ensuing subsequent drive through a longer stop. Then, as soon as the vehicle is moving again, the satellite navigation switches to speed determination and estimates the vehicle motion based on vehicle dynamics data, for example on the basis of a vehicle dynamics model (two-lane model, etc.) matched to the satellite navigation data.

[0079] Compared with pure satellite navigation sensors, since the processing algorithm or positioning algorithm knows that the vehicle is in a parked state, that is, the vehicle position does not change, based on this knowledge, the calculation algorithm can be us...

example 2

[0081] As shown in Example 1, Precise Point Positioning (PPP) is used while parked. But while continuing to drive, a Single Point Positioning (SPP) is calculated from the Global Navigation Satellite System (GNSS) and vehicle motion is calculated from vehicle driving dynamics data. In this way, computationally complex precise point positioning (PPP) can be performed for each stop in order to achieve the highest possible absolute accuracy. Based on the precise position, a "simpler" single point positioning (SPP) algorithm and vehicle dynamics data can then support high-precision positioning.

[0082] In this way, in order to maintain high-precision positioning, it is possible to focus mainly on the calculation of precise point positioning (PPP) in each parking state and during driving, mainly on the calculation of vehicle driving dynamics data. With this optimization, it achieves higher accuracy with less computational load than using a single method.

example 3

[0084] During driving at a controlled constant speed, for example when using a constant speed controller, Single Point Positioning (SPP) is performed by means of the Global Navigation Satellite System (GNSS). Since the vehicle is known to travel at a constant speed, at this point, the value dispersion originating from the Global Navigation Satellite System (GNSS) and other sensors used is estimated. And then for a corresponding random filter (eg noise matrix for a Kalman filter), for example during normal driving.

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Abstract

The invention relates to a method for selecting locating algorithms in a vehicle, wherein the locating algorithms, in particular for satellite navigation or vehicle dynamics sensors, are selected on the basis of driving states.

Description

technical field [0001] The invention relates to a method for selecting a positioning algorithm in a vehicle. Background technique [0002] Knowing where a vehicle is located is important to many functions in a vehicle. Determining a location is also known as positioning. In particular, the corresponding position of the vehicle can be determined by means of a satellite navigation system, also known as GNSS (Global Navigation Satellite System). [0003] It is known in the state of the art that positioning is performed by merging satellite navigation data with vehicle dynamics data. Examples of this are dead-reckoning systems or navigation systems, as well as parking state recognition based on vehicle dynamics sensors. This is used, for example, in Electronic Stability Control (ESC). [0004] There are numerous algorithms for determining the position of the vehicle or for co-determining the position of the vehicle eg based on satellite navigation or based on sensors of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/42G01S19/43G01S19/50G01S19/49
CPCG01S19/426G01S19/49G01S19/50G01C21/20G01S19/43G01S5/017
Inventor U·施特林M·察莱夫斯基
Owner CONTINENTAL AUTOMOTIVE TECH GMBH
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