CN105466391A - A tower base section generating method by utilization of a digital elevation model and field-data correction - Google Patents
A tower base section generating method by utilization of a digital elevation model and field-data correction Download PDFInfo
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- CN105466391A CN105466391A CN201510797262.XA CN201510797262A CN105466391A CN 105466391 A CN105466391 A CN 105466391A CN 201510797262 A CN201510797262 A CN 201510797262A CN 105466391 A CN105466391 A CN 105466391A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C7/00—Tracing profiles
Abstract
A tower base section generating method by utilization of a digital elevation model and field-data correction is disclosed. The method is characterized by comprising 1) building a large-scale scene three-dimensional model by adopting aerial photogrammetry, airborne laser radar, and other new mapping techniques to acquire coordinates of tower positions in a line, 2) mapping tower base sections, calculating coordinates of tower legs, and measuring coordinates of each tower leg direction at boundaries, 3) generating data of each tower base section in batches by utilization of an ArcGIS secondary development technique according to the digital elevation model, 4) measuring geomorphic section data from each tower center to tower leg directions on the spot, and 5) generating the rest tower section data by utilization of a Kalman filtering algorithm. Beneficial effects of the method are that tower base section measurement can be finished by a small quantity of field measurement for electric transmission line engineering in a mountainous area with a high-precision DEM and the like, engineering quality is ensured, labor intensity of mapping workers is reduced, and the working efficiency of filed final-exploration and survey is increased.
Description
Technical field
The present invention relates to a kind of method utilizing digital elevation model and field data correction to generate column foot section, belong to and survey field of locating technology end in Survey of Transmission Line design working drawing stage.
Background technology
When carrying out Survey of Transmission Line design in the area that the topographic relief such as hills, mountain area is larger, needing to carry out column foot section survey work, is the tower base sectional drawing of 1:200 or 1:300 for 220kV and above transmission route survey General Requirements survey scale.In the past, be generally obtain column foot profile data by the method for the total field digital surveying such as GPS and total powerstation, utilize the tower base sectional drawing of prosperous Software Create corresponding proportion chi.The column foot section precision that this method obtains generally can meet the requirement of line design, but labour intensity is too large, to need to cut down the vegetation efficiency such as a large amount of forests very low.
In recent years, along with the development of the emerging surveying and mapping technologies such as airborne laser radar, because these technology have stronger vegetation penetrability, thus the DEM obtaining degree of precision is made to become possibility.But in the region of dense vegetation, its plotting accuracy still can not reach above-mentioned column foot section survey permissible accuracy.
Higher to the accuracy requirement of tower leg basis outward flange scope to column foot center in column foot section survey, and relatively weaker to the column foot section accuracy requirement of remainder.On the other hand, the vegetation of column foot annex measurement range generally has similarity and DEM (digital elevation model) error has certain similarity, carries out revising the precision that can improve column foot section to column foot section by Kalman filter algorithm.
Summary of the invention
For solving the deficiencies in the prior art, the object of the present invention is to provide one to utilize DEM (digital elevation model) and field data correction to generate the method for column foot section, alleviate the labour intensity of column foot section survey while meeting requirement of engineering precision, increase work efficiency.
In order to realize above-mentioned target, the present invention adopts following technical scheme:
Utilize digital elevation model and field data correction to generate a method for column foot section, it is characterized in that, comprise the steps:
1) adopt airborne laser radar to set up large scene three-dimensional stereo model and carry out transmission line of electricity optimal routing, obtain the coordinate of circuit tower position;
2) determine the measurement range of each column foot, each Ta Genkai value, draw the column foot section in 4 legs or 8 leg directions, calculate the coordinate in each tower leg position coordinates and each tower leg direction of measurement range boundary;
3) according to step 2) in coordinate, utilize each column foot profile data of digital elevation model Mass production that ArcGIS technology generates according to photogrammetric measurement or airborne laser radar technology;
4) the topographic section data in Ge Ta center to tower leg direction are on the spot measured;
5) step 4) in data and the data of digital elevation model Mass production carry out fitting of a polynomial, utilize Kalman filter algorithm evaluator fitting parameter, generate the column foot profile data of remainder.
The mathematical model of Kalman filtering comprises state equation (dynamic equation) and observation equation two parts, and the form of its discretize is:
The aforesaid method utilizing digital elevation model and field data correction to generate column foot section, it is characterized in that, described step 3) in utilize ArcGIS secondary exploitation technology automatically to extract column foot profile data to digital elevation model, the sampling interval of column foot section survey is set, obtain the elevation that each sampling interval of column foot section all directions line is corresponding, the Distance geometry discrepancy in elevation calculating each sampling interval Dian Daota center, each column foot direction obtains column foot profile data, generates tower base sectional drawing.
The beneficial effect that the present invention reaches: for the work transmission line such as mountain area of the higher DEM of existing precision, column foot section survey work can be completed by measuring a small amount of field operation surveying work, alleviate the labour intensity of mapping worker while guaranteeing construction quality, improve the work efficiency that field operation is surveyed eventually.
Accompanying drawing explanation
Fig. 1 is schematic flow sheet of the present invention;
Fig. 2 is straight line column foot section survey schematic diagram;
Fig. 3 is corner column foot section survey schematic diagram;
Fig. 4 is Kalman filter algorithm predicts design sketch.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.Following examples only for technical scheme of the present invention is clearly described, and can not limit the scope of the invention with this.
As shown in Figure 1, the concrete steps utilizing DEM and field data correction to generate the method for column foot section of the present invention:
Step 1) adopt the technology such as LiDAR to set up large scene three-dimensional stereo model to carry out transmission line of electricity optimal routing, carry out shaft tower ranking according to the prosperous overhead transmission line plane cross section in road that three-dimensional stereo model generates, obtain the coordinate of mileage corresponding to shaft tower and grid DEM circuit tower position according to shaft tower ranking achievement.
Step 2) size that the power transmission line tower leg root of different brackets is opened is different, general higher grade, tower leg root is opened larger, for guaranteeing that design and construction safety column foot section survey General Requirements also will carry out certain prolongation and measure except measurement column foot center to tower leg root is opened along tower leg direction.
In addition, the column foot direction of measurement of tangent tower and angle tower as shown in Figure 2 and Figure 3, wherein the column foot section direction of angle tower is circuit corner angular bisector is working direction.The column foot section of multiple directions also will be measured in the region that topographic relief changes greatly on the other hand.Mainly comprise 4 leg directions and 8 leg directions, wherein 4 leg directions are A, B, C, D direction, and 8 leg directions also comprise AB, BC, CD and AD direction except above-mentioned 4 legs.
Step 3) according to above-mentioned all directions, the secondary exploitation technology such as ArcGIS are utilized to carry out elevation extraction on each column foot direction of DEM according to the sampling interval of setting, the Distance geometry discrepancy in elevation calculating each sampling interval Dian Daota center, each column foot direction obtains column foot profile data, column foot profile data is generated tower base sectional drawing according to prosperous tower base sectional drawing (ORG) form in road, is exported the tower base sectional drawing of DWG form by the prosperous software in road.
Step 4) print the tower base sectional drawing that automatically generates of DEM in proportion, in field survey process, it is compared, the outer peripheral column foot profile data in actual measurement tower center to tower leg basis, observe the vegetation at column foot scene and analyze the error of DEM and measured data, if error is less or present linear distribution, then Kalman filter algorithm predicts divides the column foot profile data revising remainder, is merged into the column foot profile data of actual measurement the drawing completing whole tower base sectional drawing in prosperous tower base sectional drawing.The application of Kalman filter correction algorithm is as follows, and for mountain route a certain base tower position A direction, column foot section survey actual measurement is to 30 meters, and the correlation data of employing comprises:
(1) field measurement column foot data (solid line);
(2) dem data (dotted line);
(3) Kalman filter data (dot-and-dash line).
Final contrast effect figure is shown in Fig. 4.Contrast (1), (2) data can be found out, dem data and measured data have comparatively big difference, and reason is that mountain area tree cover is serious, and earth's surface shrub cover thickness is large, so dem data can not well react actual landform landforms.Contrast (1), (3) data, Kalman filter algorithm filters various random disturbance in observation data process, obtains real rule, then utilizes this rule to make Extrapotated prediction.Filter value is more close to relative actual value, and forecast precision is higher, can meet requirement of engineering.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and distortion, these improve and distortion also should be considered as protection scope of the present invention.
Claims (3)
1. utilize digital elevation model and field data correction to generate the method for column foot section, it is characterized in that, comprise the steps:
1) adopt the surveying and mapping technology such as photogrammetric measurement or airborne laser radar to set up large scene three-dimensional stereo model, carry out transmission line of electricity optimal routing, obtain the coordinate of circuit tower position;
2) determine the measurement range of each column foot, each Ta Genkai value, draw the column foot section in 4 legs or 8 leg directions, calculate the coordinate in each tower leg position coordinates and each tower leg direction of measurement range boundary;
3) according to step 2) in coordinate, utilize each column foot profile data of digital elevation model Mass production that ArcGIS secondary exploitation technology generates according to photogrammetric measurement or airborne laser radar technology;
4) the topographic section data in Ge Ta center to tower leg direction are on the spot measured;
5) step 4) in data and the data of digital elevation model Mass production as initial value, utilize Kalman filter algorithm, forecast generates the column foot profile data of remainder.
2. the method utilizing digital elevation model and field data correction to generate column foot section according to claim 1, it is characterized in that, described step 3) in utilize ArcGIS secondary exploitation technology automatically to extract column foot profile data to digital elevation model, the sampling interval of column foot section survey is set, obtain the elevation that each sampling interval of column foot section all directions line is corresponding, the Distance geometry discrepancy in elevation calculating each sampling interval Dian Daota center, each column foot direction obtains column foot profile data, generates tower base sectional drawing.
3. the method utilizing digital elevation model and field data correction to generate column foot section according to claim 1, is characterized in that, described step 5) middle employing Kalman filter algorithm.
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Cited By (4)
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| CN108983169A (en) * | 2018-07-17 | 2018-12-11 | 西安电子科技大学 | A kind of metre wave radar landform modification method based on digital elevation model |
| CN109029393A (en) * | 2018-07-13 | 2018-12-18 | 中国能源建设集团安徽省电力设计院有限公司 | For assisting the photoelectricity instrument of alignment in the thick forest of mountain area |
| CN112381934A (en) * | 2020-09-28 | 2021-02-19 | 中国电建集团河北省电力勘测设计研究院有限公司 | Automatic extraction and mapping method for circuit tower footing terrain based on laser point cloud |
| JP7235921B1 (en) | 2022-07-14 | 2023-03-08 | 九州電技開発株式会社 | Support device, support method and program |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109029393A (en) * | 2018-07-13 | 2018-12-18 | 中国能源建设集团安徽省电力设计院有限公司 | For assisting the photoelectricity instrument of alignment in the thick forest of mountain area |
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| CN108983169B (en) * | 2018-07-17 | 2022-08-02 | 西安电子科技大学 | Meter wave radar terrain correction method based on digital elevation model |
| CN112381934A (en) * | 2020-09-28 | 2021-02-19 | 中国电建集团河北省电力勘测设计研究院有限公司 | Automatic extraction and mapping method for circuit tower footing terrain based on laser point cloud |
| 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 |
| JP7235921B1 (en) | 2022-07-14 | 2023-03-08 | 九州電技開発株式会社 | Support device, support method and program |
| JP2024011362A (en) * | 2022-07-14 | 2024-01-25 | 九州電技開発株式会社 | Support device, support method and program |
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