Photocontrol-point-free three-dimensional modeling and mapping device and method for multi-rotor UAV (unmanned aerial vehicle)

Abstract

The invention belongs to the technical field of UAV (unmanned aerial vehicle) photogrammetry and relates to a photocontrol-point-free three-dimensional modeling and mapping device and method for a multi-rotor UAV (unmanned aerial vehicle). By means of organic setting of a multi-rotor flying platform, a power supply module, a triaxial photography pan-tilt, an aerial photography camera, an airborneGNSS (global navigation satellite system) differential module, a communication module, an automatic driving instrument module and a control module and seven steps including accurate measurement of camera parameters, design of a three-dimensional air route, construction of a base station, automatic flying and shooting, landing check and data arrangement, accurate solving of exposure point exteriororientation line elements and photocontrol-point-free aerial triangulation calculation, aerial triangulation with precision meeting the national large-scale mapping accuracy requirement can be completed without measurement work of ground photocontrol points, and photogrammetric office work products are directly processed. According to the operation procedure, the measurement process of the groundphotocontrol points of field operation is omitted, direct connection from aerial photography to internal work's calculation of the working mode is realized, time and expenses for photocontrol point measurement of the field operation are reduced, and safety risk is effectively avoided.

Description

technical field [0001] The invention belongs to the technical field of unmanned aerial vehicle photogrammetry, and in particular relates to a device and method for three-dimensional modeling and mapping of a multi-rotor unmanned aerial vehicle without image control points. Background technique [0002] In the existing UAV traditional photogrammetry or oblique photogrammetry technology operation process, in order to ensure the geometric accuracy of aerial triangulation, it is often necessary to survey and map a certain number of ground image control points in the field, and their coordinates participate in the block adjustment calculation, but in the construction period Under the increasingly tense conditions, the increasing cost of image control point measurement, and the dangerous and difficult areas where ground personnel cannot reach, it will become increasingly urgent to reduce or even eliminate the ground image control point measurement process. [0003] However, the cu...

AI Technical Summary

Problems solved by technology

[0004] (1) Existing photogrammetry and 3D modeling aerial triangulation rely on a large or small amount of ground image control to meet the necessary error elimination of the aerial triangulation system, and cannot truly eliminate the need for image control points for forward intersection measurement and positioning

[0005] (2) The plane and elevation accuracy of aerial triangulation, especially the elevation accuracy is affected by the strict conversion relationship between the gravity field model and the shooting area, and the accuracy often cannot meet the specification requirements to meet the national standard accuracy requirements for large-scale topographic survey or 3D modeling

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