CN102706323B - Tower footing section extracting method based on airborne laser radar data - Google Patents
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- 238000004519 manufacturing process Methods 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 4
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Abstract
The invention discloses a tower footing section extracting method based on airborne laser radar data, which comprises the following steps of: determining a pole tower coordinate through line optimization design and tier pole positioning; automatically generating an appointed tower footing range according to design requirements; automatically generating a digital elevation model (DEM); editing the DEM by combining a high resolution orthoimage with point cloud data; determining a tower foot directional line and a tower foot coordinate according to the tower footing range, a tower type, a corner angle and the like; and automatically generating tower footing sections in batches. According to the tower footing section extracting method based on the airborne laser radar data, full-line tower footing section measurement can be completed indoors, and manual out-field work measurement is replaced, thus workload of fields, specially hill and high mountain areas, is greatly lowered, working efficiency is greatly increased, and remarkable economic and social benefits are achieved.
Description
Technical field
The invention belongs to aerial power transmission line tower position field of locating technology, be specifically related to a kind of column foot profile extraction method based on airborne laser radar data.
Background technology
At present, when line of electric force more than domestic 220kv is surveyed design eventually, all require to carry out column foot section survey.General way is to measure intersecting point, stake point coordinate with measurement type GPS receiver or total powerstation, the affiliated classification of these points of hand-kept and characteristic attribute data, interior industry is converted to professional electric power software format (ORG form as prosperous in road) by intersecting point and stake point gps coordinate data again, and then application corresponding software generates column foot section.
The place of setting up steel tower mostly is Huo Gao Mountain area, hills, complicated topographical conditions, going up a hill, it is particularly troublesome with total powerstation, to survey a column foot section, at least need three people could complete the surveying work of a column foot section, one people uses prism backsight, one man operation total powerstation, and a people runs section, expend a large amount of manpowers, operating efficiency is low.And applying GPS RTK method is carried out column foot section survey, the star software of the electric power of application specific can calculate four column foot coordinates automatically by determining tower position Center stake, radius, one people goes up a hill and can complete column foot section survey work, although reduced manpower, but the field operation time or long, fundamentally do not improve operating efficiency.
Development along with technology, adopt in recent years photogrammetric measurement technology to carry out the surveying work of column foot section, can reduce to a certain extent manpower and materials, improve operating efficiency, but the operating environment bad adaptability that this technology is implemented, cannot solve the problem that vegetation covers, helpless for vegetation-covered area.
Summary of the invention
For the technological deficiency that operating efficiency is low, environmental suitability is poor existing in current column foot section survey method, the present invention proposes a kind of column foot section survey method based on airborne laser radar data with high-level efficiency, good environmental adaptability.
Column foot profile extraction method based on airborne laser radar data of the present invention, comprise the following steps: 1) utilize cloud data, digital elevation model DEM, digital surface model DSM, digital orthophoto map DOM, level line to carry out three-dimensional aerial power transmission line optimal design, thereby determine shaft tower particular location; 2) according to the requirement of different high pressure grade electricity towers, determine column foot scope, draw square or circular column foot scope; 3) according to the accuracy requirement of column foot section, automatic generating digital elevation model DEM; 4) for column foot position, in conjunction with digital orthophoto map DOM, application specific data processing software carries out the editor of digital elevation model DEM, removes the noises such as earth's surface shrub, Minitype manual buildings, obtains exact figure elevation model DEM; 5) according to selected tower, corner angle, determine the direction line of four column foots, according to column foot scope, determine column foot position, thereby obtain column foot accurate coordinates; 6) according to position, the high accuracy number elevation model DEM of column foot and shaft tower, generate column foot section.
In step 1) in the described column foot profile extraction method based on airborne laser radar data, the step of fixed pole tower particular location is as follows really: 1) importing digital elevation model DEM, digital surface model DSM, digital orthophoto map DOM, level line in aerial power transmission line three-dimensional optimized wire selection system, carry out line optimization design according to power circuit design specifications; 2) determine after route selection result, in conjunction with orthography and plane cross section, carry out tier pole location, the determining of accomplish linear tower position; 3) determine the king-pile position of all towers position.
Digital elevation model DEM in step 3) in the described column foot profile extraction method based on airborne laser radar data is that application data process software generates automatically, concrete steps are as follows: after 1) circuit is determined, utilize data processing software to carry out the precise classification of cloud data; 2) application TerraModeler module, utilizes sorted ground point cloud, selects suitable graticule mesh size automatically to create digital elevation model DEM.
The meticulous of digital elevation model DEM in step 4) in the described column foot profile extraction method based on airborne laser radar data is compiled as according to dense vegetation district ,Di brushwood district, ditch district, the larger region of topographic relief situation, application several data process software combined imaging and some cloud Information generation.
Adopt column foot profile extraction method of the present invention, for the column foot on all fronts road, determine after column foot scope, at the indoor column foot sectional drawing that can automatically generate all towers position, minimizing is to manually-operated degree of dependence, therefore realized the high-efficiency homework that column foot section becomes figure; Application laser radar carries out column foot profile plotting, for regions with a varied topography such as ravines and guillies criss-cross, cliffs, according to digital terrain model, realizes the simulation to real scene, be applicable to multiple topographic condition, so this column foot profile plotting method environmental suitability is strong; The ground site density of laser radar is large, and every square metre of maximum can reach 20 laser spots, higher than traditional measurement method sampling density, has realized the high-acruracy survey of column foot section.
Accompanying drawing explanation
Fig. 1 is techniqueflow chart of the present invention.
Embodiment
To be described in detail specific embodiment of the invention scheme below.
As shown in Figure 1, the specific implementation step of a kind of column foot profile extraction method based on airborne laser radar data of the present invention is:
(1) determine shaft tower coordinate
Digital elevation model DEM, digital surface model DSM, level line are imported in three-dimensional optimized wire selection system according to digital orthophoto map DOM, in conjunction with bidimensional image and in real time section, three-dimensional scene, according to line design standard, carry out line optimization design.
Aerial power transmission line data of design requirements abundant information, data volume is large, management and the application such as the three-dimensional optimized wire selection system of massive spatial data management can conveniently carry out the amplification of G data up to a hundred, dwindles, roaming are supported in application, in this system, import the data such as DEM, DSM, level line, DOM, for route selection provide abundant can reference information.
In conjunction with the sectional drawing of high resolution 2 d orthophotoquad (distinguishable go out different brackets line of electric force, road, water system, buildings etc.), level line, any direction, according to line design standard, carry out circuit tentatively definite; Geometric superposition by DEM and DOM obtains three-dimensional real scene figure, and overhead transmission line is obtained to three-dimensional plot by design altitude and sag, carries out three-dimensional and browses, and checks circuit and the spatial relationship between atural object around, carries out line optimization.
Circuit carries out the pre-tier pole of circuit in conjunction with sectional drawing and two-dimentional orthography after determining, from striograph and three-dimensional are browsed, can look into and see if there is tower position, adjusts in time indoor, completes tier pole and determines work.
So far, complete the location work of angle tower and tangent tower, determined the positional information of all steel towers.
(2) automatically draw column foot scope
According to the requirement of different high pressure grade electricity towers, determine centered by shaft tower king-pile (Ji Tawei center), the column foot scope of certain distance scope, as 46m * 46m, 5m * 5m etc., shape can be circular or square, and is used stealthy line of vector to describe.
(3) automatic generating digital elevation model DEM
Utilize data processing software, as TerraSolid software, this software, based on the operation of MicroStation platform, comprises the modules such as TerraScan, TerraModeler, TerraPhoto, TerraMatch, and application TerraScan module is carried out the precise classification of cloud data.Utilize sorted ground point cloud automatically to create digital elevation model DEM, in constructive process, select suitable graticule mesh size, as 0.5m * 0.5m, 0.4 * 0.4m etc.
(4) digital elevation model is carried out to meticulous editor
Integrated application TerraScan, TerraModeler, TerraPhoto module are carried out the editor of digital elevation model, and main reference number elevation model, digital orthophoto map carry out meticulous editor to model.Application cloud data is classified separately, lacks the space geometry relation between atural object, by means of orthography, some cloud and digital terrain model, can well judge type of ground objects, checks local classification error, and corrects.
Carrying out when DEM edits, especially will noting dense vegetation district ,Di brushwood district, ditch district, the larger region of topographic relief, to tower position, all to carry out meticulous editing and processing in the region of 50m scope around.
(5) according to selected tower, corner angle, determine the direction line of four column foots, itself and column foot scope intersect the coordinate information that can obtain four column foots.
(6) according to the coordinate of tower position king-pile and four column foots, high accuracy number elevation model, automatically generate in batches column foot sectional drawing.
Designer selectes all tower position information, gets final product the drawing of the column foot section of all steel towers of one-key operation, has greatly improved column foot section survey work efficiency.
Adopt column foot profile extraction method of the present invention, for the column foot on all fronts road, determine after column foot scope, at the indoor column foot sectional drawing that can automatically generate all towers position, minimizing is to manually-operated degree of dependence, therefore realized the high-efficiency homework that column foot section becomes figure; Application laser radar carries out column foot profile plotting, for regions with a varied topography such as ravines and guillies criss-cross, cliffs, according to digital terrain model, realizes the simulation to real scene, be applicable to multiple topographic condition, so this column foot profile plotting method environmental suitability is strong; The ground site density of laser radar is large, and every square metre of maximum can reach 20 laser spots, higher than traditional measurement method sampling density, has realized the high-acruracy survey of column foot section.
Claims (4)
1. the column foot profile extraction method based on airborne laser radar data, is characterized in that, said method comprising the steps of:
1) utilize cloud data, digital elevation model DEM, digital surface model DSM, digital orthophoto map DOM, level line to carry out three-dimensional aerial power transmission line optimal design, thereby determine shaft tower particular location;
2) according to the requirement of different high pressure grade electricity towers, determine column foot scope, draw square or circular column foot scope;
3) according to the accuracy requirement of column foot section, automatic generating digital elevation model DEM;
4) for column foot position, in conjunction with digital orthophoto map DOM, point of application cloud data processing software carries out the editor of digital elevation model DEM, removes earth's surface shrub, Minitype manual buildings noise, obtains exact figure elevation model DEM;
5) according to selected tower, corner angle, determine the direction line of four column foots, according to column foot scope, determine column foot position, thereby obtain column foot accurate coordinates;
6) according to position, the high accuracy number elevation model DEM of column foot and shaft tower, Mass production column foot section.
2. the column foot profile extraction method based on airborne laser radar data according to claim 1, is characterized in that, in described step 1), the step of fixed pole tower particular location is as follows really:
1) importing digital elevation model DEM, digital surface model DSM, digital orthophoto map DOM, level line in aerial power transmission line three-dimensional optimized wire selection system, carry out line optimization design according to power circuit design specifications;
2) determine after route selection result, in conjunction with orthography and plane cross section, carry out tier pole location, the determining of accomplish linear tower position;
3) determine the king-pile position of all towers position.
3. the column foot profile extraction method based on airborne laser radar data according to claim 1, is characterized in that, the digital elevation model DEM in described step 3) is that application data process software generates automatically, and concrete steps are as follows:
1) after circuit is determined, utilize data processing software to carry out the precise classification of cloud data;
2) application TerraModeler module, utilizes sorted ground point cloud, selects suitable graticule mesh size automatically to create digital elevation model DEM.
4. the column foot profile extraction method based on airborne laser radar data according to claim 1, it is characterized in that, the meticulous of digital elevation model DEM in described step 4) is compiled as according to dense vegetation district, the larger region of topographic relief situation, application data process software combined imaging and some cloud Information generation.
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103884319B (en) * | 2014-03-13 | 2016-10-12 | 内蒙古电力勘测设计院有限责任公司 | Exempt from tower base sectional drawing measuring method and the equipment of total powerstation |
| CN105466391B (en) * | 2015-11-18 | 2017-12-15 | 中国能源建设集团江苏省电力设计院有限公司 | Utilize the method for digital elevation model and field data amendment generation column foot section |
| CN106529029B (en) * | 2016-10-25 | 2019-11-12 | 北京煜邦电力技术股份有限公司 | The point cloud data extracting method and device of electric power line pole tower |
| CN107238844A (en) * | 2017-06-30 | 2017-10-10 | 贵州电网有限责任公司输电运行检修分公司 | Electric transmission line channel sectional drawing preparation method is carried out based on laser point cloud radar data |
| CN109814123A (en) * | 2018-12-29 | 2019-05-28 | 中国科学院遥感与数字地球研究所 | Electric force pole tower position extracting method based on grid partition |
| CN111337944B (en) * | 2020-05-19 | 2020-07-28 | 北京数字绿土科技有限公司 | Tower footing acceptance check method and device based on foundation laser radar |
| CN111583406A (en) * | 2020-05-19 | 2020-08-25 | 北京数字绿土科技有限公司 | Pole tower foot base point coordinate calculation method and device and terminal equipment |
| CN112381934B (en) * | 2020-09-28 | 2023-08-15 | 中国电建集团河北省电力勘测设计研究院有限公司 | Line tower foundation topography automatic extraction and mapping method based on laser point cloud |
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