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Positioning method and device

A positioning method and a technology for determining modules, which are applied to measuring devices, satellite radio beacon positioning systems, instruments, etc., and can solve problems such as vehicle positioning deviations

Inactive Publication Date: 2019-03-15
ALIBABA (CHINA) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in some scenarios, such as when the vehicle is driving under a viaduct or in a tunnel, the GNSS signal received by the GNSS receiver on the vehicle will be blocked by the viaduct or tunnel, which will cause deviations in vehicle positioning

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  • Positioning method and device
  • Positioning method and device

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Embodiment Construction

[0069] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0070] The inventors of this solution found that the existing map navigation technology mainly relies on the received GNSS signal to locate the terminal equipped with the GNSS receiver, but in some scenarios, such as when the vehicle is driving under a viaduct or in a tunnel, the satellite will If it is blocked, it will lead to deviation of vehicle positioning. Therefore, this application provides a positioning technical solution, which can realize accurate pos...

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Abstract

The invention discloses a positioning method and device. The positioning method comprises the following steps: acquiring GSV output by a GNSS (Global Navigation Satellite System) receiver, and determining a visible satellite having an elevation angle greater than a preset elevation angle threshold value as a target visible satellite; determining a blocking state of the target visible satellite according to a carrier-to-noise ratio of the target visible satellite and a preset carrier-to-noise ratio threshold value; and determining whether a vehicle runs under an overpass or not by judging a continuous change of the blocking state of the target visible satellite. As the elevation angle and the carrier-to-noise ratio when the satellite is blocked are different from those when the satellite isnot blocked, the blocking state of the target visible satellite is determined according to the elevation angle and the carrier-to-noise ratio of the visible satellite; a user driving under the overpass cannot drive away from the overpass area within short time; and if the vehicle actually runs below the overpass, the target visible satellite is in a continuously blocked state, so that whether thevehicle runs under the overpass or not is determined by judging the continuous change of the blocking state of the target visible satellite, and accurate positioning of the overpass is realized.

Description

technical field [0001] The present invention relates to the technical field of positioning, in particular to a positioning method and device. Background technique [0002] In the field of map navigation, in general scenarios, terminals equipped with GNSS receivers (such as mobile phones, vehicle terminals, vehicles, etc.) will be positioned through the Global Navigation Satellite System (GNSS). However, in some scenarios, such as when the vehicle is driving under a viaduct or in a tunnel, the GNSS signal received by the GNSS receiver mounted on the vehicle will be blocked by the viaduct or tunnel, which will cause deviations in vehicle positioning. For example: positioning the vehicle originally driving under the viaduct to the viaduct, or positioning the vehicle driving in the tunnel to the parallel road outside the tunnel, etc. For this reason, it is necessary to provide a positioning technology solution that can realize accurate positioning of viaducts or tunnels. Cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/34G01S19/42
CPCG01C21/3415G01S19/42
Inventor 詹俊妮朱现龙张涛李江涛
Owner ALIBABA (CHINA) CO LTD