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Earthwork volume calculation method and system based on point cloud

A calculation method and technology of earthwork, applied in calculation, image data processing, instruments, etc., can solve problems such as large amount of calculation, inconsistent boundaries, high computing power, etc., to avoid boundary errors and simplify the amount of calculation.

Pending Publication Date: 2022-01-21
CHINA RAILWAY NO 2 ENG GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the calculation amount of the grid method is small, the calculation result is inaccurate because the boundary determined by it is an approximate boundary.
Such as the publication number: CN111595403A Chinese patent literature, which discloses a method of engineering earthwork measurement based on point cloud measurement technology, the method uses a triangular grid or Thiessen polygon grid to divide the point cloud, thereby the earthwork volume calculation; however, the amount of calculation is huge and requires high computing power to solve; and because the method extracts the point cloud and the measurement point cloud are separately established grids, the boundaries of the two will not be uniform, resulting in errors

Method used

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  • Earthwork volume calculation method and system based on point cloud
  • Earthwork volume calculation method and system based on point cloud
  • Earthwork volume calculation method and system based on point cloud

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Experimental program
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Embodiment 1

[0036] figure 1 A logic block diagram of a method for calculating earthwork volume based on point clouds in an exemplary embodiment of the present invention is shown. The calculation method of this embodiment mainly includes:

[0037] S1. Obtain topographic point cloud data and design planes, and divide the point cloud data into several elevation areas;

[0038] Calculate the average value of point cloud height coordinates in several elevation areas to obtain the average elevation;

[0039] Specifically, the step S1 may include:

[0040] S11. The point cloud area is divided into several square elevation areas with the same side length, and the calculation formula of the side length d of the square elevation area is:

[0041]

[0042] Among them, X max Indicates the maximum value of the X coordinates of all points in the point cloud, X min Represents the minimum value of the X coordinates of all points in the point cloud, Y max Indicates the maximum value of the Y coor...

Embodiment 2

[0067] A foundation pit project such as Figure 5 As shown, the point cloud data in the area where the foundation pit is located contains 10 million three-dimensional coordinate data. Under the PC environment of Intel (R) core (TM) I5 CPU and 8GB memory, the method of the present invention and the triangular grid are adopted respectively to generate Calculate the excavation volume, and the calculation time of the two is shown in Table 1.

[0068] Table 1

[0069] method Computer computing time The method of the present invention 1 minute 45 seconds triangulation method 2 hours and 11 minutes

[0070] It can be seen that the method proposed by the present invention saves the computing power of the computer to a large extent, and then makes the application of the method more flexible, and can be used on low-performance devices.

Embodiment 3

[0072] Figure 6 Shown is an earthwork calculation system based on a point cloud according to an exemplary embodiment of the present invention, that is, an electronic device 310 (such as a computer server with a program execution function), which includes at least one processor 311, a power supply 314, and a point cloud A data acquisition module, and a memory 312 and an input / output interface 313 that are communicatively connected to the at least one processor 311; the memory 312 stores instructions that can be executed by the at least one processor 311, and the instructions are executed by the at least one processor 311 A processor 311 executes, so that the at least one processor 311 can execute the method disclosed in any of the foregoing embodiments; the input and output interface 313 can include a display, a keyboard, a mouse, and a USB interface for input and output data ; The power supply 314 is used to provide electric energy for the electronic device 310 .

[0073] Th...

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Abstract

The invention belongs to the field of earthwork, and particularly relates to an earthwork volume calculation method and system based on point cloud, which comprises the following steps of: obtaining terrain point cloud data and a design plane, and dividing the point cloud data into a plurality of elevation areas; calculating the average value of the point cloud height coordinates in the plurality of elevation areas to obtain the average elevation of the elevation areas; dividing the design plane into a plurality of polygons; judging an elevation area where the vertexes of the plurality of polygons are located, and obtaining the average elevation of the vertexes of the plurality of polygons in the elevation area as the average elevation of the vertexes of the polygons; acquiring the calculated elevation of the polygon by the average elevation of the vertexes of the polygon; acquiring the earthwork volume by the areas of the polygons and the calculation elevation, and judging whether the earthwork volume is the excavation volume or the filling volume according to the positive or negative earthwork volume. On the premise that the calculation precision is guaranteed, the earthwork calculation amount is simplified; and the calculation boundary is consistent with the design boundary, so that the boundary error is avoided.

Description

technical field [0001] The invention belongs to the field of earthwork engineering, and in particular relates to a method for calculating earthwork volume based on point clouds. Background technique [0002] Earthwork is one of the main projects in construction engineering, including excavation, filling, transportation, drainage and precipitation of all earthworks. In civil engineering, earthwork works include: site leveling, subgrade excavation, civil air defense excavation, ground filling, subgrade filling and foundation pit backfilling. It is necessary to arrange the construction plan reasonably, try not to arrange it in the rainy season. At the same time, in order to reduce the construction cost of earthwork and rockwork, implement the principle of not occupying or occupying less farmland and arable land, and is conducive to land improvement, a reasonable deployment plan for earthwork and overall planning should be made. The calculation of earthwork is an important basi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/62G06T17/20G06Q50/08
CPCG06T7/62G06T17/20G06Q50/08
Inventor 刘辉胡若愚李善军朱晓旭邓勇
Owner CHINA RAILWAY NO 2 ENG GRP CO LTD
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