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Plane sight distance analysis method based on AutoCAD

An analysis method and line-of-sight technology, applied in the field of line-of-sight analysis, can solve problems such as engineering waste, and achieve the effect of easy learning and use of methods, improving design quality, and fast execution.

Inactive Publication Date: 2017-06-20
TIANJIN MUNICIPAL ENG DESIGN & RES INST
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Problems solved by technology

Since the clearance value of each section on the curve is different, if the whole curve is cleared with this value, it will inevitably cause waste in engineering

Method used

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  • Plane sight distance analysis method based on AutoCAD
  • Plane sight distance analysis method based on AutoCAD

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Embodiment Construction

[0028] An AutoCAD-based plane sight distance analysis method of the present invention will be described in detail below in conjunction with the embodiments and accompanying drawings.

[0029] A kind of plane sight distance analysis method based on AutoCAD of the present invention utilizes the calculation and drawing ability of the computer, can quickly and conveniently draw out the sight distance envelope diagram on the horizontal curve that needs to carry out sight distance inspection, and verifies whether the clear distance inside the curve is Meet the requirements of driving sight distance.

[0030] Such as figure 1 , figure 2 Shown, a kind of plane line-of-sight analysis method based on AutoCAD of the present invention carries out secondary development to CAD by vlisp language, is based on the plane line that has drawn in the design drawing, carries out the inspection method of line-of-sight to line-of-sight. A kind of plane line-of-sight analysis method based on AutoCA...

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Abstract

The invention provides a plane sight distance analysis method based on AutoCAD. The method comprises the steps that the drawing environment of CAD software is initialized; a viewpoint trajectory curve is generated, wherein the linetype entity of the curve is a polyline; the starting point and the end point of the viewpoint trajectory curve and the total length parameter of the viewpoint trajectory curve are acquired; parameters which comprise the sight distance envelope line fitting accuracy, the driving sight distance and the sight line generation spacing are input into an interactive interface; the starting point and the end point of the first set of straight lines are acquired; the number of cycles is set and T corresponding cycles are carried out to successively acquire all driving sight line intersections, and the driving sight line intersections are successively stored into a list; a drawing layer in CAD software is set as a sight distance curve; and a Pline command in CAD software is used to restore all intersections in the list to acquire a sight distance envelope line. According to the invention, the method makes full use of the computing ability and the drawing function of a computer; the design quality is improved; the safety of road operation is ensured; and the method is easy to learn and use, has the advantages of fast execution speed and the high flexibility, and is suitable for the engineering design.

Description

technical field [0001] The invention relates to a line-of-sight analysis method. In particular, it relates to a plane sight distance analysis method based on AutoCAD. Background technique [0002] Sight distance is an important design index to ensure the safety of highway driving, and it is one of the compulsory indicators of highway engineering construction standards. The shortest driving distance that the car travels along the road during the period from when the driver finds an obstacle to when he decides to take some measures is called the sight distance. Therefore, each lane along the highway should have sufficient sight distance, so that the driver can detect potential dangers in time and make correct responses to ensure driving safety. The line-of-sight safety evaluation technology is an important part of the road safety guarantee technology. It is a formal line-of-sight inspection and evaluation of road engineering projects, traffic engineering projects or any engi...

Claims

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Application Information

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IPC IPC(8): G06T11/20
Inventor 娄中波曹高尚贺海王晓华朱彬王海燕董刚宋瀛崔文博苑中丹陶学谦闫正张李明王元尹洪正赵吉田珂
Owner TIANJIN MUNICIPAL ENG DESIGN & RES INST
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