Method for estimating measurement accuracy of local global positioning system (GPS) based on tested triangular piece

A measurement accuracy and DUT technology, applied in the field of local GPS measurement accuracy evaluation, can solve the problems of low evaluation efficiency, large workload, large random errors, etc., to reduce the number of placements, eliminate the influence of measurement accuracy evaluation, The effect of improving evaluation efficiency

Active Publication Date: 2012-03-14
CHENGDU AIRCRAFT INDUSTRY GROUP
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Problems solved by technology

This method not only requires a large workload, but also has large random errors, and requires a large amount of data analysis and processing, so the evaluation efficiency is low and there are systematic errors

Method used

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  • Method for estimating measurement accuracy of local global positioning system (GPS) based on tested triangular piece
  • Method for estimating measurement accuracy of local global positioning system (GPS) based on tested triangular piece
  • Method for estimating measurement accuracy of local global positioning system (GPS) based on tested triangular piece

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Embodiment Construction

[0013] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific implementation examples.

[0014] figure 1 , figure 2 A method for evaluating the accuracy of local GPS measurement based on a triangular DUT of the present invention is shown, comprising the steps of:

[0015] Step 1): Prepare a triangular test piece, which is a triangular structure with a thickness and a concentric triangular hole in the middle. The angles of the inner and outer triangles are 60.1°, 59.9°, and 60°, respectively; The side length is greater than 350mm. Process 4 tiny marking points arranged in a rectangle on each component surface of the outer triangle. The longitudinal length between the points should not be less than 300mm. Use a high-precision three-coordinate measuring machine to test and calibrate its manufacturing accuracy. Measure the coordinates of each marked point, calculate the sum of the distances be...

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Abstract

The invention relates to a method for estimating the measurement accuracy of a local global positioning system (GPS) based on a tested triangular piece. The method comprises the following steps of: designing a measurement accuracy estimation tested triangular piece, arranging measuring points on the surface of the triangular piece, measuring all the measuring points by using a high-accuracy three-coordinate measuring machine, and calculating the distances among all the measuring points and the included angles among all fitting surfaces; arranging a measuring field of the local GPS, measuring all the measuring points, and calculating the distances among all the measuring points and the included angles among all the fitting surfaces; and estimating the measurement accuracy of the local GPS according to a measuring result. In the method, the length and angle measurement accuracy of the local GPS can be estimated simultaneously; a plurality of groups of measurement values can be acquired after the tested triangular piece is placed at any position, so that the placement frequency of the tested triangular piece can be reduced, and estimation efficiency is improved; and the measurement accuracy of the local GPS is estimated by a method for comparing and measuring the local GPS and high-accuracy measuring equipment, so that the influence of system errors on the estimation of the measurement accuracy in the conventional estimation method can be eliminated.

Description

technical field [0001] The invention relates to a local area GPS measurement accuracy evaluation method, in particular to a local area GPS measurement accuracy evaluation method based on a triangular measured object. Background technique [0002] Compared with other space measurement equipment, local GPS can flexibly arrange a high-precision local space measurement system according to different measurement environments, and local GPS also has advantages in measurement speed, flexibility, reliability and multi-point simultaneous measurement. Therefore, as the size of the measurement object becomes larger and the shape becomes more and more complex, local GPS has been widely used in the field of large-scale space measurement technology. Measurement accuracy is one of the main basis for the selection of measurement equipment. For local As far as the evaluation of GPS measurement accuracy is concerned, it is necessary to evaluate the measurement accuracy of its super-large measu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/01
Inventor 秦龙刚黄翔
Owner CHENGDU AIRCRAFT INDUSTRY GROUP
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