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Three-point differencial GPS (Global Position System) dynamic positioning accuracy calibration method

A calibration method and accuracy technology, applied in the direction of measuring devices, instruments, etc., to achieve the effect of convenient establishment of benchmarks

Active Publication Date: 2015-06-03
BEIJING AEROSPACE INST FOR METROLOGY & MEASUREMENT TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The static orientation accuracy of "three-point differential GPS orientation" can be calibrated with the baseline network of known geodetic azimuth, but the calibration of dynamic orientation accuracy is still a difficult problem

Method used

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  • Three-point differencial GPS (Global Position System) dynamic positioning accuracy calibration method

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Embodiment Construction

[0023] The three-point differential GPS dynamic orientation accuracy calibration method of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0024] Such as figure 2 As shown, the three-point differential GPS dynamic orientation accuracy calibration method of the present invention comprises the steps:

[0025] (a) Set the GPS fixed station 8 first, that is, install the antenna of the GPS fixed station on the tripod 7, connect the antenna of the GPS fixed station to the receiver of the GPS fixed station, and connect the receiver of the GPS fixed station to the transmitting station;

[0026] Then set up two GPS motion stations and GPS motion reference stations with a distance of 10m to 100m (for example, 10m or 100m);

[0027] Place the GPS antenna 1 of the GPS exercise station on the electric guide rail one 2, and the electric guide rail one 2 is erected on the reference point i3 of the GPS exercise ...

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Abstract

The invention provides a three-point differencial GPS (Global Position System) dynamic positioning accuracy calibration method comprising the following steps of: firstly arranging a GPS fixed station, and then arranging a GPS movement station and a GPS movement reference station at the interval of 10-100 m; placing a GPS antenna of the GPS movement station on an electric guide rail 1 and a GPS antenna of the GPS movement reference station on the electric guide rail 2; enabling the GPS antenna of the GPS movement station and the GPS antenna of the GPS movement reference station to respectively do linear motion on the electric guide rail 1 and the electric guide rail 2, and enabling the motion states of the GPS antenna of the GPS movement station and the GPS antenna of the GPS movement reference station to be consistent; measuring for multiple times, and calculating to obtain three-point differencial GPS dynamic positioning accuracy. In the invention, a reference is conveniently established, the problem of difficult manufacture of a large moving carrier, the speed of the electric guide rail 1 and the electric guide rail 2 is adjustable, and as for using states at different speed, the requirement can be met by only adjusting the speed of the electric guide rail 1 and the electric guide rail 2 without replacing equipment.

Description

technical field [0001] The invention belongs to the field of measurement and calibration of geometric quantities, and in particular relates to a calibration method for the accuracy of azimuth angles in dynamic measurement by a three-point differential GPS. Background technique [0002] "Differential GPS orientation" refers to the use of GPS receivers to measure the longitude, latitude and elevation of two points separated by a certain distance on the ground, and make a difference to calculate the geodetic azimuth of the line connecting the two points. The farther the distance between two points is, the greater the difference in longitude and latitude between the two points will be, and the accuracy of the azimuth angle obtained will be higher; "difference" can also reduce the common errors in positioning, such as: satellite orbit error, satellite Clock difference, ionospheric effect, tropospheric effect, etc., improve orientation accuracy. [0003] Differential GPS has high...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C25/00
Inventor 李永刚商秋芳周玉堂张忠武赵功伟张俊杰王蕾
Owner BEIJING AEROSPACE INST FOR METROLOGY & MEASUREMENT TECH
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