CN110189311A - A kind of calculation method of transmission line of electricity screen of trees hidden danger region trees felling area - Google Patents
A kind of calculation method of transmission line of electricity screen of trees hidden danger region trees felling area Download PDFInfo
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- CN110189311A CN110189311A CN201910440598.9A CN201910440598A CN110189311A CN 110189311 A CN110189311 A CN 110189311A CN 201910440598 A CN201910440598 A CN 201910440598A CN 110189311 A CN110189311 A CN 110189311A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/88—Lidar systems specially adapted for specific applications
- G01S17/89—Lidar systems specially adapted for specific applications for mapping or imaging
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/4802—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00 using analysis of echo signal for target characterisation; Target signature; Target cross-section
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q10/00—Administration; Management
- G06Q10/06—Resources, workflows, human or project management; Enterprise or organisation planning; Enterprise or organisation modelling
- G06Q10/063—Operations research, analysis or management
- G06Q10/0635—Risk analysis of enterprise or organisation activities
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q50/00—Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
- G06Q50/06—Electricity, gas or water supply
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/0002—Inspection of images, e.g. flaw detection
- G06T7/0004—Industrial image inspection
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/60—Analysis of geometric attributes
- G06T7/62—Analysis of geometric attributes of area, perimeter, diameter or volume
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/10—Image acquisition modality
- G06T2207/10032—Satellite or aerial image; Remote sensing
- G06T2207/10044—Radar image
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/30—Subject of image; Context of image processing
- G06T2207/30181—Earth observation
- G06T2207/30184—Infrastructure
Abstract
The invention discloses a kind of calculation methods of transmission line of electricity screen of trees hidden danger region trees felling area, it is related to electric power supervisory control technical field, the following steps are included: S1: being scanned using laser radar apparatus to transmission line of electricity, obtain the laser point cloud data of transmission line of electricity；S2: pre-processing the step S1 laser point cloud data obtained, then by man-machine interactively, realizes data sophisticated category, extracts screen of trees hidden danger point data；S3: screen of trees hidden danger point boundary is extracted, hidden danger region minimum polygon is obtained；S4: the minimum polygon in step S3 is divided into multiple triangles；S5: seeking the sum of step S4 intermediate cam shape area is the area in screen of trees hidden danger region.
Description
Technical field
The present invention relates to electric power supervisory control technical field, in particular to a kind of transmission line of electricity screen of trees hidden danger region trees are cut
Cut down the calculation method of area.
Background technique
With the development of economy, the range that transmission line of electricity is crossed over increasingly is expanded, and grows thickly ground across mountain forest, farmland etc. trees
The quantity in area is also more and more, and trees are that transmission line of electricity bring security risk is also increasingly severe, increases transmission line of electricity and connects
The occurrence probability of earth fault, influences the normal operation of power grid, also severely impacts our daily life.
It is always that O&M unit ensures that the emphasis of electric power facility safe operation is also difficult task that screen of trees hidden danger, which is removed,.At present
Existing trees barrier, but short out then several kilometers of power transmission line are all eliminated using the method for felling, long can reach several hundred public affairs
In, certain line lengths transprovincially even can reach thousands of kilometers, at present can be because of personnel and equipment when falling trees barrier
It arranges to be more than the waste that is required and causing human and material resources and financial resources needed, and arranges the insufficient normal fortune that then will affect power grid
Row.
Summary of the invention
The object of the present invention is to provide a kind of calculation methods of transmission line of electricity screen of trees hidden danger region trees felling area, can be with
The area that screen of trees hidden danger region needs to fall trees quickly is calculated, technical support is provided for O&M unit, to help O&M list
Position carries out human and material resources in advance and shares out the work, to achieve the purpose that save the cost, improve working efficiency.
To solve the above problems, the first aspect of the present invention provides a kind of transmission line of electricity screen of trees hidden danger region trees felling
The calculation method of area, comprising the following steps:
S1: transmission line of electricity is scanned using laser radar apparatus, obtains the laser point cloud data of transmission line of electricity.
S2: pre-processing the step S1 laser point cloud data obtained, then by man-machine interactively, realizes that data are finely divided
Class extracts screen of trees hidden danger point data.Wherein man-machine interactively is corrected to the deficiency of algorithm, chooses the automatic classification error of algorithm
Data, modify data category, promote the accuracy of final classification
S3: screen of trees hidden danger point boundary is extracted, hidden danger region minimum polygon is obtained.
S4: the minimum polygon in step S3 is divided into multiple triangles.
S5: seeking the sum of step S4 intermediate cam shape area is the area in screen of trees hidden danger region.
Further technical solution is that step S2 specifically includes:
S21: the laser radar point cloud data that scanning is obtained, by determining tower, piecemeal, classification.Wherein determining tower is according to fortune
Data are marked in the number of row steel tower, provide analysis report convenient for the later period, can directly find hidden danger according to analysis report
Locating route running section.Piecemeal is to consider analytical calculation machine limited capacity, the data of whole segment length's route is divided into several
Section track data, then handled.
S22: passing through man-machine interactively, modifies the classification of mistake, completes sophisticated category work.Wherein man-machine interactively is to algorithm
Deficiency corrected, choose the data of the automatic classification error of algorithm, modify data category, promote the accuracy of final classification.
Further technical solution is that step S3 specifically includes:
S31: projecting to plane coordinates for hidden danger point and fasten, and statistics obtains all dangerous points.
S32: the boundary point in screen of trees hidden danger region is obtained using Alpha-Shapes algorithm.
S33: the boundary point in screen of trees hidden danger region is connected, boundary line, as hidden danger region minimum polygon are obtained.
Further technical solution is that step S4 is specific are as follows: appoints and takes a boundary point for vertex, by vertex and owns
The boundary point adjacent with vertex does not connect, and forms several triangles with boundary line.
Further technical solution is that step S5 is specific are as follows: each triangle area is calculated using vector area method, then
The triangle area is added to obtain the area of hidden danger region minimum polygon, as transmission line of electricity screen of trees hidden danger region trees
Cut down area.
Hidden danger region minimum polygon is calculated, using Alpha-Shapes algorithm, radius of circleFoundation point cloud density and reality
The setting of border situation.Negligible height value (Z value), therefore hidden danger point can be projected into plane coordinates and fastened, statistics obtains all danger
The number nearly put is N, and each point is respectively P1、P2、P3…PN, all the points composition point set P (P1、P2、P3…PN).It is selected in point set P
P1As initial point, peripheral distance P is calculated1It is less thanAll the points, it is assumed that be point set S (P2、P3、P4…PN).It is calculated
Any point P is taken in point set S2, drawing a radius isAnd pass through P1、P2Circle C1, then crossed algorithm meter by distance
Calculate circle C1Centre point coordinate value Cm1(Xm1, Ym1), the distance algorithmic formula that crosses is as follows:
In formula: For radius.
The centre point P being calculated3For origin, calculate in point set S in addition to P1And P2Other outer all the points are to centre point Cm1's
Distance LP3、LP4、LP5…LPNIf all LPNIt is greater thanIllustrate then to can be determined that P without other points in circle1、P2For boundary point,
Its line is boundary line；Work as LPNIt is less thanWhen, illustrate to illustrate P there are other points in circle1、P2Non- boundary point.LPNIt is less thanWhen,
It then needs to continue to calculate other points in point set S, continues to judge all the points.In point set P (P1、P2、P3…PN) in continue to select it is next
A point is judged, until all the points can be obtained boundary point and boundary line in point set P after the completion of judging.
A polygon is obtained after all boundary line connections, when calculating area of a polygon, is calculated using vector area method polygon
Shape area, with P1For vertex, polygon is divided into several triangles P1P2P3、P1P3P4、P1P4P5‥‥P1Pn-1Pn, to
The area that amount area method calculates separately each triangle is SP1P2P3、SP1P3P4、SP1P4P5‥‥SP1Pn-1Pn, calculation formula is as follows:
All triangle areas being calculated are added, SP1P2P3‥PnPn+1=SP1P2P3+SP1P3P4+SP1P4P5+‥‥+
SP1PnPn+1, so that it may obtain polygon SP1P2P3‥PnPn+1Area.
Above-mentioned technical proposal of the invention has following beneficial technical effect: traditional measurement method is typically only capable to measure
Dangerous point out not can be measured screen of trees hidden danger area, and the present invention only needs laser radar point cloud data, no matter anyly
Shape environment all can quickly calculate screen of trees hidden danger region trees felling area, and precision is very high, while avoiding hard work
Amount.Obtain whole transmission line of electricity screen of trees felling area after arrange personnel and equipment again, can great save the cost, improve work
Make efficiency, it can be with maximum guarantee staff's personal safety.
Detailed description of the invention
Fig. 1 is the point cloud data top view of the transmission line of electricity dangerous point of embodiment 1；
Fig. 2 is the transmission line of electricity dangerous point point cloud data side view of embodiment 1；
Fig. 3 is that circle C is calculated in embodiment 11Centre point coordinate value schematic diagram；
Fig. 4 is to judge P in embodiment 12It is the schematic diagram of boundary point；
Fig. 5 is to judge P in embodiment 13It is not the schematic diagram of boundary point；
Fig. 6 is the boundary point obtained after having judged all the points and boundary line schematic diagram；
Fig. 7 is the transmission line of electricity screen of trees hidden danger region trees felling area being calculated according to embodiment 1.
Detailed description of the invention: 1: danger zone；2: conducting wire；3: shaft tower.
Specific embodiment
In order to make the objectives, technical solutions and advantages of the present invention clearer, With reference to embodiment and join
According to attached drawing, the present invention is described in more detail.It should be understood that these descriptions are merely illustrative, and it is not intended to limit this hair
Bright range.In addition, in the following description, descriptions of well-known structures and technologies are omitted, to avoid this is unnecessarily obscured
The concept of invention.
Embodiment 1
Transmission line of electricity is scanned using laser radar apparatus, obtains the laser point cloud data of transmission line of electricity；It will sweep again
The laser radar point cloud data for retouching acquisition modifies mistake using man-machine interactively by determining tower, piecemeal, classification pretreatment work
Classification, complete sophisticated category work.
Transient analysis is carried out, dangerous point point cloud data, the transmission line of electricity screen of trees in selection as depicted in figs. 1 and 2 are got
Hidden danger area data calculates the area for needing to cut down.
The minimum polygon in dangerous point point cloud data periphery is obtained, the minimum polygon in dangerous point periphery is obtained, use
All dangerous points are projected to plane coordinate system first by Alpha-Shapes algorithm, obtain dangerous point point set P, are concentrated and are appointed from
Anticipate a point P1Start, selects all the points in point 1m, obtain point set S, a point P is arbitrarily selected in point set S2, calculating obtains
It takes and passes through P1P2Centre point coordinate Cm1, as shown in figure 3, calculating in point set S using centre point as origin in addition to P1And P2It is outer other
The distance of all the points to centre point illustrates then to can be determined that P without other points in circle if all distances are greater than 0.5m1、P2For side
Boundary's point, line are boundary line, as shown in Figure 4；When there is point distance less than 0.5m, illustrate that there are other points in circle, say
Bright P1、P2Non- boundary point, as shown in Figure 5；It is being repeated in this step, other points in point set S is being calculated, has judged P1Afterwards, then successively
Other points in point set P are selected, are successively judged according to above-mentioned steps, until the judgement for completing all the points is completed, eventually
The polygon being closed to one, as shown in Figure 6.
Area of a polygon is calculated, with P1Polygon is divided into multiple triangles for origin, is counted respectively using vector area method
The area of each triangle is calculated, is finally added and obtains the area of polygon, seeks to the transmission line of electricity screen of trees hidden danger region calculated
Trees cut down area, are 25.33m by area is calculated2, as shown in Figure 7.
Finally, calculating separately according to above step to every section, every grade, every place's data, all screens of trees on transmission line of electricity are found out
Hidden danger region trees cut down area.
It should be understood that above-mentioned specific embodiment of the invention is used only for exemplary illustration or explains of the invention
Principle, but not to limit the present invention.Therefore, that is done without departing from the spirit and scope of the present invention is any
Modification, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.In addition, appended claims purport of the present invention
Covering the whole variations fallen into attached claim scope and boundary or this range and the equivalent form on boundary and is repairing
Change example.
Claims (5)
1. a kind of calculation method of transmission line of electricity screen of trees hidden danger region trees felling area, which comprises the following steps:
S1: transmission line of electricity is scanned using laser radar apparatus, obtains the laser point cloud data of transmission line of electricity；
S2: pre-processing the step S1 laser point cloud data obtained, then by man-machine interactively, realizes data sophisticated category,
Extract screen of trees hidden danger point data；
S3: screen of trees hidden danger point boundary is extracted, hidden danger region minimum polygon is obtained；
S4: the minimum polygon in step S3 is divided into multiple triangles；
S5: seeking the sum of step S4 intermediate cam shape area is the area in screen of trees hidden danger region.
2. the calculation method of transmission line of electricity screen of trees hidden danger region trees felling area according to claim 1, feature exist
In step S2 specifically includes:
S21: the laser radar point cloud data that scanning is obtained, by determining tower, piecemeal, classification；
S22: passing through man-machine interactively, modifies the classification of mistake, completes sophisticated category work.
3. the calculation method of transmission line of electricity screen of trees hidden danger region trees felling area according to claim 1, feature exist
In step S3 specifically includes:
S31: projecting to plane coordinates for hidden danger point and fasten, and statistics obtains all dangerous points；
S32: the boundary point in screen of trees hidden danger region is obtained using Alpha-Shapes algorithm；
S33: the boundary point in screen of trees hidden danger region is connected, boundary line, as hidden danger region minimum polygon are obtained.
4. the calculation method of transmission line of electricity screen of trees hidden danger region trees felling area according to claim 1, feature exist
In step S4 is specific are as follows:
Appoint and take a boundary point for vertex, vertex is connect with all not boundary points adjacent with vertex, if being formed with boundary line
Dry triangle.
5. the calculation method of transmission line of electricity screen of trees hidden danger region trees felling area according to claim 1, feature exist
In step S5 is specific are as follows:
Each triangle area is calculated using vector area method, then is added the triangle area to obtain hidden danger region minimum polygon
The area of shape, as transmission line of electricity screen of trees hidden danger region trees cut down area.
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Cited By (5)
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| CN110727907A (en) * | 2019-09-18 | 2020-01-24 | 宁夏宁电电力设计有限公司 | Method for calculating cutting range of trees below power transmission line |
| CN111583257A (en) * | 2020-05-28 | 2020-08-25 | 中国铁道科学研究院集团有限公司 | Railway clearance foreign matter intrusion detection method, device and system |
| CN112200859A (en) * | 2020-10-30 | 2021-01-08 | 久瓴(江苏)数字智能科技有限公司 | Target area processing method and device, storage medium and electronic device |
| CN112580894A (en) * | 2020-12-30 | 2021-03-30 | 广东电网有限责任公司广州供电局 | Power transmission line hidden danger area prediction method and device, electronic equipment and readable storage medium |
| CN114431018A (en) * | 2022-03-22 | 2022-05-06 | 南方电网电力科技股份有限公司 | Tree obstacle clearing method, device and system |
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