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A Calculation Method of Incomplete Transitional Mileage Back Calculation

A calculation method and mitigation technology, applied in geometric CAD, special data processing applications, etc.

Active Publication Date: 2021-04-27
HUNAN LIANZHI BRIDGE & TUNNEL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide a method for back-calculation of mileage on incomplete transitional curves to solve the problem of back-calculation of mileage from coordinates of points on incomplete transitional curves

Method used

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  • A Calculation Method of Incomplete Transitional Mileage Back Calculation
  • A Calculation Method of Incomplete Transitional Mileage Back Calculation
  • A Calculation Method of Incomplete Transitional Mileage Back Calculation

Examples

Experimental program
Comparison scheme
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Embodiment

[0052] see Figure 1 to Figure 5 , an incomplete transitional curve mileage inverse calculation method, this embodiment is applied to the mileage and offset calculation of points on the incomplete transitional curve.

[0053] An incomplete transition curve mileage calculation method, comprising the following steps:

[0054] Step A: Judging the intersection point JD of the intersection interval where point P is located according to the line coordinates (X, Y) of point P s and the curve segment corresponding to the intersection point;

[0055] Expressway route design information in the present embodiment is as shown in table 1:

[0056] Table 1 Design information of a highway route (partial)

[0057]

[0058] Given that the line coordinates of point P are (3827611.5120, 500527.3875), according to the coordinates of point P and each intersection point, calculate the distance from point P to each intersection point, and find the intersection point JD closest to point P m , ...

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Abstract

The invention provides an incomplete transition curve mileage back calculation method. The method includes the following steps: judging the intersection point JD of the intersection interval where the point P is located according to the line coordinates of the point P and the line design information s and JD s Corresponding curve segment; find JD s The point P closest to point P on the corresponding curve segment 0 ; Judgment point P 0 Whether the linear segment on the curve segment is an incomplete transitional curve; if point P 0 The linear segment on the curve segment is an incomplete transitional curve, and the incomplete transitional curve is completed as a complete transitional curve, and the line mileage and offset distance of point P are calculated d . The present invention only needs to judge the point P according to the relationship between the tangent vector of each principal point on the curve segment corresponding to the intersection point and the vector from each principal point to point P 0 The linear segment on the curve segment can further judge whether the linear segment is an incomplete transitional curve, without calculating all the line elements, which simplifies the process of linear judgment.

Description

technical field [0001] The invention relates to the technical field of line engineering, in particular to an incomplete transitional curve mileage inverse calculation method. Background technique [0002] In the process of line engineering survey, a large number of problems of calculating coordinates from mileage and recalculating mileage from coordinates will be encountered, such as setting out the center line of the line, setting out side piles, re-measurement of the center line, etc. The method of calculating coordinates from mileage has been relatively perfect. There are mainly two methods: line element method and intersection point method. Both methods have their own advantages and have a large number of practical applications; There are many initial parameters; the calculation method of the intersection method is simple and clear, but different line shapes need to be distinguished during calculation. [0003] There are also many discussions on the calculation method o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/13
CPCG06F30/13
Inventor 吴勇生梁晓东杨承昆刘佳意文言周俊华刘盼盼
Owner HUNAN LIANZHI BRIDGE & TUNNEL TECH
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