Position correction method based on CORS, positioning terminal and positioning system

A technology for positioning terminals and positioning systems, applied in satellite radio beacon positioning systems, radio wave measurement systems, measurement devices, etc., can solve the problem that hardware improves positioning accuracy, the positioning accuracy of ordinary mobile terminals cannot fully meet the needs, and users cannot modify it. and other problems to achieve the effect of improving the positioning accuracy

Inactive Publication Date: 2018-05-01
湖南省测绘科技研究所 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] With the rapid development of satellite navigation and positioning services, and the public's higher and higher requirements for positioning services, the positioning accuracy of ordinary mobile terminals obviously cannot fully meet the needs
The GNSS positioning module of ordinary mobile terminals

Method used

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  • Position correction method based on CORS, positioning terminal and positioning system
  • Position correction method based on CORS, positioning terminal and positioning system
  • Position correction method based on CORS, positioning terminal and positioning system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Embodiment 1: as Figure 1~2 , a CORS-based location correction method, comprising the following steps:

[0048] Step 1: Build an irregular grid model;

[0049] The nearest three CORS reference stations are connected to each other to form a triangle, and each CORS reference station is a node of the triangle, and the node data of node m adopts the coordinate difference of the corresponding CORS reference station (Δx m , Δy m , Δz m ); A plurality of described triangles forms an irregular grid model;

[0050] Coordinate difference of CORS reference station (Δx m , Δy m , Δz m ) refers to the known coordinate value of the CORS reference station (X m , Y m ,Z m ) (CORS reference station coordinates are obtained through joint measurement and adjustment with national A-level and B-level GPS control points.) and real-time pseudo-range coordinates (real-time pseudo-range coordinates are obtained by CORS reference station receivers The real-time positioning coordinate ...

specific example

[0087] Taking HNCORS as an example, three CORS reference stations YYSQ, YYHR and YYDT are selected to form a triangular station network. Five test points were selected within this triangle, and Huawei P9 mobile phone was used to collect data. The test results are shown in the table below, where △1 is the difference between the coordinate value measured by the Huawei P9 mobile phone and the RTK standard value, and △1 is the difference between the coordinate value calculated by this method and the RTK standard value.

[0088] Note: HuNan continuously operating reference stations, referred to as HNCORS. HNCORS is a network of national A-level and B-level point-to-point surveys and overall adjustment precision calculations. It is a 365-day*24-hour continuous uninterrupted observation station network, and precision adjustment calculations are carried out regularly. Currently HNCORS has a total of 122 reference stations (85 reference stations are compatible with the Beidou system),...

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Abstract

The present invention discloses a position correction method based on a CORS (Continuously Operating Reference Station), a positioning terminal and a positioning system. The position correction methodcomprises the following steps of: the step 1: establishing an irregular grid model: performing mutual connection of each three nearest CORSs to form one triangle, and forming an irregular grid modelby employing the plurality of triangles; and the step 2: matching a corresponding triangle according to outline coordinates (x, y, z) provided by a position service request terminal, namely determining that which three CORSs form the triangle where the position service request terminal is located, calculating coordinate correction numbers ([Alpha]m, [Beta]m, [Gamma]m) according to the coordinate difference of the three CORSs at a corresponding moment, and finally obtaining a corrected position coordinate value (x+[Alpha]m, y+[Beta]m, z+[Gamma]m) of the position service request terminal. The position correction method based on CORS, the positioning terminal and the positioning system can substantially improve the positioning precision and are easy to carry out.

Description

technical field [0001] The invention relates to a CORS-based position correction method, a positioning terminal and a positioning system. Background technique [0002] There are two positioning technologies for mobile terminals, one is positioning based on the Global Navigation Satellite System (GNSS for short), and the other is positioning based on a base station of a mobile operating network. The positioning method based on GNSS is to use the GNSS positioning module on the mobile phone to receive satellite signals to realize the positioning of the mobile phone, and the positioning accuracy is generally 10 to 20 meters. Base station positioning is to use the base station to measure the distance of the mobile phone to determine the location of the mobile phone. The latter does not require mobile phones to have GNSS positioning capabilities, but the accuracy depends largely on the distribution of base stations and the size of the coverage area. Sometimes the error will excee...

Claims

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Application Information

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IPC IPC(8): G01S19/40G01S19/42
CPCG01S19/40G01S19/42
Inventor 董明旭华亮春秘金钟楚彬谷守周尹昊华陈春花敖敏思刘紫平
Owner 湖南省测绘科技研究所
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