CN106898032A - A kind of vertical sighting distance analysis method based on AutoCAD - Google Patents
A kind of vertical sighting distance analysis method based on AutoCAD Download PDFInfo
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Abstract
A kind of vertical sighting distance analysis method based on AutoCAD：Initialize the drawing environment of CAD software；In interactive interface input：Forward direction is checked/inversely checked, eye is high, thing is high, driving sight distance, sighting distance fitting precision and sight line generate spacing；Interactive mode chooses the vertical curve for needing inspection；Obtain the starting point and vertical curve total length of vertical curve；Cycle-index T is calculated, and circulates corresponding contents T times, obtain a high point, thing high point, driving sight line intersection point, and described eye high point, thing high point, driving sight line intersection point are stored in eye point list high, thing point list high and driving sight line intersection point point list；Each point data in eye point list t high, thing point list high and driving sight line intersection point list is read using the Pline orders in CAD software respectively, eye line high, thing line high and the sighting distance envelope of vertical curve is obtained.The present invention is applied to based on all highway route design softwares developed under CAD patterns, not only directly perceived and computational accuracy is high.Realize the drafting that sighting distance envelope diagram is automatically performed after specified control parameter.
Description
Technical field
The present invention relates to a kind of sighting distance analysis side.More particularly to a kind of vertical sighting distance analysis method based on AutoCAD.
Background technology
Sighting distance is a significant design index for ensureing highway driving safety, is highway engineering construction standard compulsory index
One of.What since driver travelled to automobile in this period section for determining take certain measure finding barrier along road surface
Most short running distance, referred to as sighting distance.Therefore, each track of Highways ' should have enough sighting distances, driver is examined in time
Feel potential dangerous, and make correct response, it is ensured that traffic safety.Sighting distance Safety Evaluation Technology is road safety safeguards technique
Important component, is to the Highway Project in design, construction and operation, traffic engineering project or any and highway
The relevant engineering project of user formally carries out sighting distance inspection and evaluates, to find the potential sighting distance deficiency section of project and elimination
A kind of safeguard technology of the potential safety hazard for thus causing.
Driving sight distance can be divided into stopping sight distance, meeting sighting distance, passing sight distance to ensure traffic safety, should enable driver
See the pavement of road of front certain distance, to find there is barrier or to always car on road surface in time, make automobile certain
Speed under can in time brake or avoid, so as to avoid accident.
The conventional method of driving sight distance inspection mainly has maximum T. minor computational methods and geometrograph (to draw sighting distance bag
Network figure) etc., these methods are simple and practical, and the former can check on curve whether plane sighting distance meets requirement, the latter at a certain position
The scope of influence sighting distance on horizontal curve (or vertical curve) can more accurately be determined.Maximum horizontal stroke is not only can determine that with geometrograph
Clear distance, can also determine the T. minor of any pile No. on any horizontal curve, and analytic method can only determine that the maximum of circular curve is horizontal net
Away from, therefore, geometrograph more has superiority from from the point of view of general applicability.
Manual drawing sighting distance envelope diagram very complicated, amount of calculation is big, it is necessary to manually draw a plurality of stadia hairs, drawing is fast
Degree is slow, and efficiency is low, the accuracy that cumulative errors influence driving sight distance is checked.If by programming software, with AutoCAD in same place
Reason space motion, is automatically performed the drafting of sighting distance envelope diagram after the specified parameter of realization, can save the extensive work time, there is provided work
Efficiency.
The domestic inspection to plane sighting distance has had more research, theoretical and method also comparative maturity；And for perpendicular
To the check analysis of sighting distance, a kind of more effective method of inspection is not provided yet, main reason is that, eye trajectory high, thing
Trajectory high, design vertical section line are three independent space curves, it is difficult to seek an analytic solutions for sighting distance envelope.
The content of the invention
The technical problems to be solved by the invention are to provide after one kind realizes specified control parameter and are automatically performed sighting distance bag
The vertical sighting distance analysis method based on AutoCAD that network figure is drawn.
The technical solution adopted in the present invention is：A kind of vertical sighting distance analysis method based on AutoCAD, including following step
Suddenly：
1) drawing environment of CAD software is initialized, including：Set current layer, close CAD drawing environments in it is orthogonal and
Catch and by CAD argument pointer direction models space；
2) it is input into following parameter in interactive interface：Forward direction is checked/inversely checked, eye is high, thing is high, driving sight distance, sighting distance are intended
Close precision and sight line generation spacing；
3) interactive to choose the vertical curve for needing inspection, the line style entity of the vertical curve is multi-section-line, into next step
Suddenly, if the non-multi-section-line of line style entity for obtaining, program is terminated, and point out：Multi-section-line please be converted into, subsequently into next step；
4) the starting point qpt0 of vertical curve and the parameter of vertical curve total length are obtained；
5) cycle-index T, cycle-index T=fix [(vertical curve total length-driving sight distance)/sighting distance fitting precision] are calculated,
And circulate following content：
(1) cal-pt functions are used, two parameters of starting point qpt0 and driving sight distance according to vertical curve are obtained on vertical curve
Another point zpt0；
(2) the starting point qpt0 according to vertical curve, obtains the starting point corresponding eye high point eye_p0, eye high point eye_p0 and rises
The derivation relation of point qpt0 is：X-coordinate is identical, and the Y-coordinate+eye of the Y-coordinate=starting point qpt0 of eye high point eye_p0 is high；
(3) according to another point zpt0 on vertical curve, the corresponding thing high point ent_p0 of another point zpt0, thing high point are obtained
Ent_p0 is with the derivation relation of another point zpt0：X-coordinate is identical, and the Y of Y-coordinate=another point zpt0 of thing high point ent_p0 sits
Mark+thing is high；
(4) it is eye high point eye_p0 to obtain first group of starting point of straight line L1, and first group of terminal of straight line L1 is thing high point
ent_p0；
(5) two parameters of starting point qpt0 and sighting distance fitting precision according to vertical curve, perpendicular song is obtained by cal-pt functions
The first point qpt1 on line；
(6) according to two parameters of the first point qpt1 and driving sight distance, second on vertical curve is obtained by cal-pt functions
Point zpt1；
(7) according to the first point qpt1 on vertical curve, the corresponding eye high point eye_p1 of the first point qpt1, eye high point are obtained
Eye_p1 is with the derivation relation of the first point qpt1：X-coordinate is identical, the Y of a Y-coordinate=first point qpt1 of eye high point eye_p1
Coordinate+eye is high；
(8) the second point zpt1 according to vertical curve, obtains second point zpt1 corresponding thing high point ent_p1, thing high point ent_
The derivation relation of p1 and second point zpt1 is：X-coordinate is identical, and the Y-coordinate of the Y-coordinate=second point zpt1 of thing high point ent_p1+
Thing is high；
(9) first group of straight line L1 is obtained：Starting point is eye high point (eye_p0), and terminal is thing high point (ent_p0)；
(10) it is eye high point eye_p1 to obtain second group of starting point of straight line L2, and second group of terminal of straight line L2 is thing high point
ent_p1；
(11) intersection point of first group of straight line L1 and second group of straight line L2, the intersection point driving sight line intersection point are asked；
(12) the starting point qpt0 of vertical curve is redefined：Qpt0=qpt1；
(13) circulate T times, all of eye high point, thing high point, driving sight line intersection point are obtained successively, and described eye is high
Point, thing high point, driving sight line intersection point are sequentially stored into eye point list eyelst high, thing point list entlst high and driving sight line respectively
In intersection point itlst point lists；
6) using the Pline orders in CAD software read respectively eye point list eyelst high, thing point list entlst high and
Each point data in driving sight line intersection point itlst lists, obtains eye line high, thing line high and the sighting distance envelope of vertical curve.
By step 2) described in parameter be set to certain span and default value, this module eye allowed band X high is 0
＜ X≤5, default value is 1.2；Thing allowed band Y high is 0 ＜ Y≤5, and default value is 0.1；Driving sight distance allowed band Z is 0 ＜ Z
≤ 2000, default value is 110；Sighting distance fitting precision allowed band T be 0 ＜ T≤1,5, default value is 2；Sight line generation spacing permits
Perhaps scope W is 5 ＜ W≤10, and default value is 20.
By step 5) the cal-pt functions described in (1st) are：A point pt and curve on known curve in itself, calculate curve
The upper X-coordinate with point pt is the other point cal-pt of Dist at a distance of length, and specific development procedure is as follows：
(1) curve pl is obtained；
(2) the X-coordinate pt_x of pt points on curve is obtained；
(3) according to X-coordinate pt_x and Dist, obtain with pt points in x directions at a distance of the point npt_x for Dist, derive relation
For npt_x is identical with the Y-coordinate of pt_x, the X-coordinate+Dist of the X-coordinate=pt_x of npt_x
(4) according to npt_x points, vertical configuration line xline is generated；
(5) intersection point of curve pl and vertical configuration line xline is obtained, the intersection point is another point cal- on curve
pt。
In step 5) (1st) step~the (12) cyclic process in, at interval of length be sight line generate spacing when, just will
First group of straight line L1 and second group of straight line L2 draw out, so that designer tests to driving sight line.
A kind of vertical sighting distance analysis method based on AutoCAD of the invention, is entered using the built-in lisp language of AUTOCAD
Row programming, by the eye for drawing vertical curve respectively trajectory high, thing trajectory high, draws out the vertical sighting distance envelope of vertical curve
With driving sight line, to check whether the barriers such as the overbridge on vertical curve influence driving sight distance.The present invention is suitable for being based on
The all highway route design softwares developed under CAD patterns, it is that can obtain sighting distance envelope to click on planned course line, it is not only directly perceived and
Computational accuracy is high.Realize the drafting that sighting distance envelope diagram is automatically performed after specified control parameter.The method of the present invention is easy to learn and use,
Perform speed fast, flexibility is strong, is suitable for engineering design.
Brief description of the drawings
Fig. 1 is a kind of flow chart of the vertical sighting distance analysis method based on AutoCAD of the present invention.
Specific embodiment
A kind of vertical sighting distance analysis method based on AutoCAD of the invention is made in detail with reference to embodiment and accompanying drawing
Describe in detail bright.
A kind of vertical sighting distance analysis method based on AutoCAD of the invention, according to existing 1：The vertical section of 1 ratio sets
Meter line, by the eye for drawing vertical curve respectively trajectory high, thing trajectory high, can very easily draw out the vertical of vertical curve
Sighting distance envelope and driving sight line, to check the barriers such as the overbridge on vertical curve whether to influence driving sight distance, eliminate by
This potential safety hazard for causing, improves traffic safety.
Vertical sighting distance analysis module carries out secondary development by vlisp language to CAD, with completed in scheming 1:1
Based on vertical curve, respectively from positive, reverse both direction, the inspection of sighting distance is carried out.As shown in figure 1, of the invention one
The vertical sighting distance analysis method based on AutoCAD is planted, is comprised the following steps：
1) drawing environment of CAD software is initialized, including：Set current layer, close CAD drawing environments in it is orthogonal and
Catch and by CAD argument pointer direction models space；
2) it is input into following parameter in interactive interface：Forward direction is checked/inversely checked, eye is high, thing is high, driving sight distance, sighting distance are intended
Close precision and sight line generation spacing；
Described parameter may be alternatively provided as certain span and default value, and this module eye allowed band X high is 0 ＜ X
≤ 5, default value is 1.2；Thing allowed band Y high is 0 ＜ Y≤5, and default value is 0.1；Driving sight distance allowed band Z be 0 ＜ Z≤
2000, default value is 110；Sighting distance fitting precision allowed band T be 0 ＜ T≤1,5, default value is 2；Sight line generation spacing is allowed
Scope W is 5 ＜ W≤10, and default value is 20.
3) interactive to choose the vertical curve for needing inspection, the line style entity of the vertical curve is multi-section-line, into next step
Suddenly, if the non-multi-section-line of line style entity for obtaining, program is terminated, and point out：Multi-section-line please be converted into, subsequently into next step；
4) the starting point qpt0 of vertical curve and the parameter of vertical curve total length are obtained；
5) cycle-index T, cycle-index T=fix [(vertical curve total length-driving sight distance)/sighting distance fitting precision] are calculated,
And circulate following content：
(1) cal-pt functions are used, two parameters of starting point qpt0 and driving sight distance according to vertical curve are obtained on vertical curve
Another point zpt0；
Described cal-pt functions are：A point pt and curve on known curve in itself, calculate that the X on curve with point pt sits
Mark is the other point cal-pt of Dist at a distance of length, and specific development procedure is as follows：
(1) curve pl is obtained；
(2) the X-coordinate pt_x of pt points on curve is obtained；
(3) according to X-coordinate pt_x and Dist, obtain with pt points in x directions at a distance of the point npt_x for Dist, derive relation
For npt_x is identical with the Y-coordinate of pt_x, the X-coordinate+Dist of the X-coordinate=pt_x of npt_x
(4) according to npt_x points, vertical configuration line xline is generated；
(5) intersection point of curve pl and vertical configuration line xline is obtained, the intersection point is another point cal- on curve
pt。
(2) the starting point qpt0 according to vertical curve, obtains the starting point corresponding eye high point eye_p0, eye high point eye_p0 and rises
The derivation relation of point qpt0 is：X-coordinate is identical, and the Y-coordinate+eye of the Y-coordinate=starting point qpt0 of eye high point eye_p0 is high；
(3) according to another point zpt0 on vertical curve, the corresponding thing high point ent_p0 of another point zpt0, thing high point are obtained
Ent_p0 is with the derivation relation of another point zpt0：X-coordinate is identical, and the Y of Y-coordinate=another point zpt0 of thing high point ent_p0 sits
Mark+thing is high；
(4) starting point for obtaining first group of straight line L1 (i.e. first driving sight line) is eye high point eye_p0, first group of straight line
The terminal of L1 is thing high point ent_p0；
(5) two parameters of starting point qpt0 and sighting distance fitting precision according to vertical curve, perpendicular song is obtained by cal-pt functions
The first point qpt1 on line；
(6) according to two parameters of the first point qpt1 and driving sight distance, second on vertical curve is obtained by cal-pt functions
Point zpt1；
(7) according to the first point qpt1 on vertical curve, the corresponding eye high point eye_p1 of the first point qpt1, eye high point are obtained
Eye_p1 is with the derivation relation of the first point qpt1：X-coordinate is identical, the Y of a Y-coordinate=first point qpt1 of eye high point eye_p1
Coordinate+eye is high；
(8) the second point zpt1 according to vertical curve, obtains second point zpt1 corresponding thing high point ent_p1, thing high point ent_
The derivation relation of p1 and second point zpt1 is：X-coordinate is identical, and the Y-coordinate of the Y-coordinate=second point zpt1 of thing high point ent_p1+
Thing is high；
(9) first group of straight line L1 is obtained：Starting point is eye high point (eye_p0), and terminal is thing high point (ent_p0)；
(10) starting point of second group of straight line L2 (i.e. Article 2 driving sight line) is obtained for eye high point eye_p1, second group of straight line
The terminal of L2 is thing high point ent_p1；
(11) first group of straight line L1 (eye_p0, ent_p0) and second group of intersection point of straight line L2 (eye_p1, ent_p1) are asked,
The intersection point driving sight line intersection point；
(12) the starting point qpt0 of vertical curve is redefined：Qpt0=qpt1；
(13) circulate T times, all of eye high point, thing high point, driving sight line intersection point are obtained successively, and described eye is high
Point, thing high point, driving sight line intersection point are sequentially stored into eye point list eyelst high, thing point list entlst high and driving sight line respectively
In intersection point itlst point lists；
It is just straight by first group during at interval of length for sight line generation spacing in the cyclic process of (1st) step~the (12)
Line L1 and second group of straight line L2 draw out, so that designer tests to driving sight line.
6) using the Pline orders in CAD software read respectively eye point list eyelst high, thing point list entlst high and
Each point data in driving sight line intersection point itlst lists, obtains eye line high, thing line high and the sighting distance envelope of vertical curve.
Claims (4)
1. a kind of vertical sighting distance analysis method based on AutoCAD, it is characterised in that comprise the following steps：
1) drawing environment of CAD software is initialized, including：Current layer, the orthogonal and seizure closed in CAD drawing environments are set
And by CAD argument pointer direction models space；
2) it is input into following parameter in interactive interface：Forward direction is checked/inversely checked, eye is high, thing is high, driving sight distance, sighting distance fitting essence
Degree and sight line generate spacing；
3) interactive to choose the vertical curve for needing inspection, the line style entity of the vertical curve is multi-section-line, into next step, if
The non-multi-section-line of line style entity for obtaining, terminates program, and point out：Multi-section-line please be converted into, subsequently into next step；
4) the starting point qpt0 of vertical curve and the parameter of vertical curve total length are obtained；
5) cycle-index T, cycle-index T=fix [(vertical curve total length-driving sight distance)/sighting distance fitting precision] are calculated, and is followed
The following content of ring：
(1) cal-pt functions are used, two parameters of starting point qpt0 and driving sight distance according to vertical curve obtain another on vertical curve
One point zpt0；
(2) the starting point qpt0 according to vertical curve, obtains the starting point corresponding eye high point eye_p0, eye high point eye_p0 and starting point
The derivation relation of qpt0 is：X-coordinate is identical, and the Y-coordinate+eye of the Y-coordinate=starting point qpt0 of eye high point eye_p0 is high；
(3) according to another point zpt0 on vertical curve, another point zpt0 corresponding thing high point ent_p0, thing high point ent_p0 are obtained
Derivation relation with another point zpt0 is：X-coordinate is identical, the Y-coordinate+thing of Y-coordinate=another point zpt0 of thing high point ent_p0
It is high；
(4) it is eye high point eye_p0 to obtain first group of starting point of straight line L1, and first group of terminal of straight line L1 is thing high point ent_p0；
(5) two parameters of starting point qpt0 and sighting distance fitting precision according to vertical curve, are obtained on vertical curve by cal-pt functions
The first point qpt1；
(6) according to two parameters of the first point qpt1 and driving sight distance, the second point on vertical curve is obtained by cal-pt functions
zpt1；
(7) according to the first point qpt1 on vertical curve, the first point qpt1 corresponding eye high point eye_p1, eye high point eye_p1 are obtained
Derivation relation with the first point qpt1 is：X-coordinate is identical, and the Y-coordinate of a Y-coordinate=first point qpt1 of eye high point eye_p1+
Eye is high；
(8) the second point zpt1 according to vertical curve, obtains the corresponding thing high point ent_p1 of second point zpt1, thing high point ent_p1 with
The derivation relation of second point zpt1 is：X-coordinate is identical, and the Y-coordinate+thing of the Y-coordinate=second point zpt1 of thing high point ent_p1 is high；
(9) first group of straight line L1 is obtained：Starting point is eye high point (eye_p0), and terminal is thing high point (ent_p0)；
(10) it is eye high point eye_p1 to obtain second group of starting point of straight line L2, and second group of terminal of straight line L2 is thing high point ent_
p1；
(11) intersection point of first group of straight line L1 and second group of straight line L2, the intersection point driving sight line intersection point are asked；
(12) the starting point qpt0 of vertical curve is redefined：Qpt0=qpt1；
(13) circulate T time, all of eye high point, thing high point, sight line intersection point of driving a vehicle are obtained successively, and by described eye high point, thing
High point, driving sight line intersection point are sequentially stored into eye point list eyelst high, thing point list entlst high and driving sight line intersection point respectively
In itlst point lists；
6) eye point list eyelst high, thing point list entlst high and driving are read using the Pline orders in CAD software respectively
Each point data in sight line intersection point itlst lists, obtains eye line high, thing line high and the sighting distance envelope of vertical curve.
2. a kind of vertical sighting distance analysis method based on AutoCAD according to claim 1, it is characterised in that by step
2) parameter described in is set to certain span and default value, and this module eye allowed band X high is 0 ＜ X≤5, default value
It is 1.2；Thing allowed band Y high is 0 ＜ Y≤5, and default value is 0.1；Driving sight distance allowed band Z is 0 ＜ Z≤2000, default value
It is 110；Sighting distance fitting precision allowed band T be 0 ＜ T≤1,5, default value is 2；Sight line generation spacing allowed band W is 5 ＜ W
≤ 10, default value is 20.
3. a kind of vertical sighting distance analysis method based on AutoCAD according to claim 1, it is characterised in that by step
5) the cal-pt functions described in (1st) are：A point pt and curve on known curve in itself, calculate that the X on curve with point pt sits
Mark is the other point cal-pt of Dist at a distance of length, and specific development procedure is as follows：
(1) curve pl is obtained；
(2) the X-coordinate pt_x of pt points on curve is obtained；
(3) according to X-coordinate pt_x and Dist, obtain with pt points in x directions at a distance of the point npt_x for Dist, derivation relation is
Npt_x is identical with the Y-coordinate of pt_x, the X-coordinate+Dist of the X-coordinate=pt_x of npt_x
(4) according to npt_x points, vertical configuration line xline is generated；
(5) intersection point of curve pl and vertical configuration line xline is obtained, the intersection point is another point cal-pt on curve.
4. a kind of vertical sighting distance analysis method based on AutoCAD according to claim 1, it is characterised in that in step
5) in the cyclic process of (1st) step~the (12), when at interval of length being that sight line generates spacing, just by first group of straight line L1 and
Second group of straight line L2 draws out, so that designer tests to driving sight line.
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| CN102433811A (en) * | 2011-10-15 | 2012-05-02 | 天津市市政工程设计研究院 | Method for determining minimum distance of road intersections in harbor district |
| KR101456556B1 (en) * | 2012-11-16 | 2014-11-12 | 한국건설기술연구원 | The Automate Road Mapping Method Using Observed Field Data |
| CN104704497A (en) * | 2012-10-08 | 2015-06-10 | 赫克斯冈技术中心 | Method and system for virtual assembly of a structure |
| CN104850701A (en) * | 2015-05-20 | 2015-08-19 | 天津市市政工程设计研究院 | Geometric graphing method for graphing vertical stadia envelope curves of concave vertical curves |
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2017
- 2017-01-19 CN CN201710040186.7A patent/CN106898032A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005084740A (en) * | 2003-09-04 | 2005-03-31 | Fukui Computer Kk | Cad device, offset line drawing method, and cad program |
| CN102433811A (en) * | 2011-10-15 | 2012-05-02 | 天津市市政工程设计研究院 | Method for determining minimum distance of road intersections in harbor district |
| CN104704497A (en) * | 2012-10-08 | 2015-06-10 | 赫克斯冈技术中心 | Method and system for virtual assembly of a structure |
| KR101456556B1 (en) * | 2012-11-16 | 2014-11-12 | 한국건설기술연구원 | The Automate Road Mapping Method Using Observed Field Data |
| CN104850701A (en) * | 2015-05-20 | 2015-08-19 | 天津市市政工程设计研究院 | Geometric graphing method for graphing vertical stadia envelope curves of concave vertical curves |
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