CN102375145A

CN102375145A - Method for estimating measurement accuracy of local global positioning system (GPS) based on tested triangular piece

Info

Publication number: CN102375145A
Application number: CN2010102592937A
Authority: CN
Inventors: 秦龙刚; 黄翔
Original assignee: Chengdu Aircraft Industrial Group Co Ltd
Current assignee: Chengdu Aircraft Industrial Group Co Ltd
Priority date: 2010-08-23
Filing date: 2010-08-23
Publication date: 2012-03-14
Anticipated expiration: 2030-08-23
Also published as: CN102375145B

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

A kind of local GPS measuring accuracy appraisal procedure based on the triangle measured piece

Technical field

The present invention relates to a kind of local GPS measuring accuracy appraisal procedure, relate in particular to a kind of local GPS measuring accuracy appraisal procedure based on the triangle measured piece.

Background technology

Because relative other space measurement equipment; Local GPS can be according to different measurement environment; Lay high-precision local space neatly and measure system, and local GPS also has advantage aspect the measurement simultaneously of measuring speed, dirigibility, reliability and multiple spot, therefore along with the size of measuring object is increasing; Shape becomes increasingly complex; Local GPS has obtained widely using in the large scale space measurement technical field, and measuring accuracy is one of main foundation of selecting for use of measuring equipment, for the assessment of local GPS measuring accuracy; Should assess in the measuring accuracy of 2m～200m its super large measurement range, again the measuring accuracy of varying number transmitter combinations assessed.Conventional local GPS measuring accuracy appraisal procedure is: a large amount of measurement points of the diverse location duplicate measurements space in repeatedly, carry out statistical study to measurement data, then according to analysis result estimation local GPS measuring accuracy.The not only required workload of this method is big, and has big stochastic error, need carry out the lot of data analyzing and processing simultaneously, so assess effectiveness is low, has systematic error.

Summary of the invention

The object of the present invention is to provide a kind of assess effectiveness high, can eliminate the local GPS measuring accuracy appraisal procedure of systematic error influence.

For solving the problems of the technologies described above, a kind of local GPS measuring accuracy appraisal procedure based on the triangle measured piece of the present invention comprises the steps:

Step 1): prepare the triangle measured piece; This measured piece is the triangular structure with thickness; It is one concentric tri-angle-holed that the centre has, and is shaped on some gauge points on leg-of-mutton outside each composition face, uses high accuracy three coordinate measuring machine that its manufacturing accuracy is detected demarcation;

Step 2): the triangle measured piece is put the position that in local GPS measurement field, need carry out accuracy evaluation;

Step 3): use local GPS measuring pen to measure the gauge point on each composition face of outer triangle successively; Evenly measure 3 points at leg-of-mutton each composition face, calculate each interior angle angle of inside and outside two triangle and the distance between each gauge point according to the measurement coordinate figure of these points;

Step 4): will take measurement of an angle and three coordinate measuring machine is demarcated angle and compared, and can obtain local GPS angle-measurement accuracy; Length will be measured and the three coordinate measuring machine calibrated length compares, local GPS linear measure longimetry precision can be obtained.

Described triangle measured piece, three angles of its inside and outside triangle are respectively 60.1 °, 59.9 °, 60 °, and the external edge of measured piece is grown up in 350mm.4 rectangular arrangements of gauge point of described triangle measured piece, longitudinal length should be not less than 300mm between point.

The present invention compared with present technology, its advantage and effect are: can be simultaneously local GPS be surveyed long, angle measurement accuracy and assess; The triangle measured piece is whenever put a position, just can obtain many group measured values, can reduce the triangle measured piece and put number of times, has improved assess effectiveness; Utilize local GPS and high-acruracy survey equipment to compare its measuring accuracy of method assessment of measurement, can eliminate the influence that systematic error is assessed measuring accuracy in the conventional appraisal procedure.

Description of drawings

Fig. 1 is the measurement markers point synoptic diagram of a kind of local GPS measuring accuracy appraisal procedure based on the triangle measured piece of the present invention.

Fig. 2 is a triangle synoptic diagram in the measurement of a kind of local GPS measuring accuracy appraisal procedure based on the triangle measured piece of the present invention.

Embodiment

Below in conjunction with accompanying drawing and practical implementation instance, technical scheme of the present invention is further specified.

Fig. 1, Fig. 2 show a kind of local GPS measuring accuracy appraisal procedure based on the triangle measured piece of the present invention, comprise the steps:

Step 1): prepare the triangle measured piece, this measured piece is the triangular structure with thickness, and it is one concentric tri-angle-holed that the centre has, and the angle of its inside and outside triangle is respectively 60.1 °, 59.9 °, 60 °; The external edge of measured piece is grown up in 350mm.The micro marks point of 4 rectangular arrangements of processing on leg-of-mutton outside each composition face, longitudinal length should be not less than 300mm between point, uses high accuracy three coordinate measuring machine that its manufacturing accuracy is detected demarcation.Measure each gauge point coordinate, calculate between each gauge point distance with; Measure each interior angle angle of Three Triangle;

Step 2): the triangle measured piece is put the position that in local GPS measurement field, need carry out accuracy evaluation, demarcate position between each generating laser of local GPS measurement field;

Step 3): use 4 gauge points of measurement on each composition face of the outer successively triangle of local GPS measuring pen, evenly measure 3 points at leg-of-mutton each composition face; According to the measurement coordinate figure of these points, utilize the Spatial Analyzer software of local GPS, calculate each interior angle angle of inside and outside two triangle and the distance between each gauge point.

Change the position of triangle measured piece, repeating step 2)～4), the local GPS measuring accuracy of diverse location can be obtained;

Change the installation quantity of generating laser, repeating step 2)～4), can obtain different generating lasers quantity, the local GPS measuring accuracy of different spatial are installed.

Claims

1. local GPS measuring accuracy appraisal procedure based on the triangle measured piece is characterized in that: may further comprise the steps:

Step 1): prepare the triangle measured piece; This measured piece is the triangular structure with thickness; It is one concentric tri-angle-holed that the centre has, and is shaped on some gauge points on leg-of-mutton outside each composition face, uses high accuracy three coordinate measuring machine that triangle measured piece manufacturing accuracy is detected demarcation;

2. a kind of local GPS measuring accuracy appraisal procedure according to claim 1 based on the triangle measured piece; It is characterized in that: described triangle measured piece; Three angles of its inside and outside triangle are respectively 60.1 °, 59.9 °, 60 °, and the external edge of measured piece is grown up in 350mm.

3. a kind of local GPS measuring accuracy appraisal procedure based on the triangle measured piece according to claim 1 and 2, it is characterized in that: 4 rectangular arrangements of gauge point of described triangle measured piece, longitudinal length should be not less than 300mm between point.

4. a kind of local GPS measuring accuracy appraisal procedure according to claim 1 based on the triangle measured piece; It is characterized in that: use high accuracy three coordinate measuring machine to detect each gauge point coordinate of demarcating the triangle measured piece; Calculate between each gauge point distance with, measure each interior angle angle of Three Triangle.