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A Solar Energy Potential Assessment Method Based on Ground Laser Point Cloud

A laser point cloud and solar energy technology, applied in the field of solar energy resource assessment, can solve problems such as large shadow area and difficult to adapt to complex scenes

Active Publication Date: 2019-08-27
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, for vegetation, the canopy has outward extension at high altitude, which will cause the shadow area produced by this type of method to be too large, and it is difficult to adapt to complex scenes.

Method used

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  • A Solar Energy Potential Assessment Method Based on Ground Laser Point Cloud
  • A Solar Energy Potential Assessment Method Based on Ground Laser Point Cloud
  • A Solar Energy Potential Assessment Method Based on Ground Laser Point Cloud

Examples

Experimental program
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Embodiment

[0067] The schematic flow chart of this embodiment can be seen figure 1 , the specific operation process is as follows:

[0068] 1. Point set extraction of survey area

[0069] Known 3D terrestrial laser point cloud P raw The original point cloud data such as figure 2 As shown in (a), the point cloud is first down-sampled (thinning), that is, the number of data points in the point cloud is reduced. Typically, the data accuracy of terrestrial laser point clouds is too redundant for illumination calculations. Therefore, it is necessary to set a thinning distance L first s , so that the point cloud spacing after thinning can be kept at L s left and right and the point cloud structure remains unchanged. This method adopts a voxel thinning method with local structure preservation. This method first divides the point cloud into s The regular cube voxel, and then the center point of the point set in the voxel is used as a new data point, and these new point sets form a thinne...

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Abstract

The invention discloses a ground laser point cloud based solar energy potential evaluation method, which comprises the steps of S1, rarefying the original point cloud; S2, performing extraction of a ground point set R in a region of interest on the rarefied point cloud P, wherein the rarefied point cloud P is a subset of the ground point set R; S3, setting a light source deviation control angle; S4, quickly calculating the position and the number of base points by adopting a farthest-first traversal strategy; S5, calculating the base point sun position; S6, performing shading analysis on a three-dimensional point cloud scene by adopting a generalized hidden point removal (GHPR) algorithm, and thus performing sunlight simulation calculation; S7, performing binary shadow rendering on a shading analysis result; and S8, performing solar radiation calculation on the point cloud scene. The evaluation method disclosed by the invention can provide quick and efficient automatic evaluation for solar energy resources, and can provide a three-dimensional solar energy resource distribution map in any time period of an investigated area for users.

Description

technical field [0001] The invention relates to the field of computer graphics, in particular to a method for evaluating solar energy resources by using laser point clouds. Background technique [0002] The traditional assessment of solar energy potential is mainly based on the method of subjective estimation during the installation of equipment. However, the distribution of solar radiation depends on time, climate, and the spatial position relationship of objects in the survey environment. Simple inspection and calculation are difficult to deal with complex and changeable conditions. Investigate the environment, such as urban areas, woodlands, and traffic sections. For the traditional manual measurement method, its analysis efficiency is low, and the data collection and subsequent processing are separated, which is difficult to meet the needs. Therefore, an accurate analysis method with the ability of time-space transformation and inversion is urgently needed. [0003] In ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/507
Inventor 李军黄鹏頔程明陈一平王程
Owner XIAMEN UNIV
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