UAV (unmanned aerial vehicle) aerial photography measurement method and UAV aerial photography measurement system

Abstract

The invention relates to the field of aviation, in particular to a UAV (unmanned aerial vehicle) aerial photography measurement method and a UAV aerial photography measurement system, which can acquire accurate coordinates of the exposure station position of the aerial aircraft photography and record a signal at the exposure moment of an aerial camera simultaneously. The UAV aerial photography measurement method comprises the following steps of acquiring a single frequency signal and a double frequency signal which are transmitted from a satellite and are related to the position of the UAV by using a global navigation satellite system; triggering a trigger relay to shoot when the single frequency signal accords with a preset route parameter of the UAV; and meanwhile, the exposure moment during photography and the corresponding double frequency signal which is acquired by using a pulse circuit are recorded, and the position of the UAV based on the double frequency signal is acquired.

Description

technical field [0001] The invention relates to the field of aerial photogrammetry, in particular to an aerial photogrammetry method and a UAV aerial photogrammetry system. Background technique [0002] In recent years, light and small surveying and mapping UAVs with a total weight of 20-25 kg and a load of about 5 kg have been widely used in emergency surveying and mapping data acquisition, island reefs, etc. Surveying and mapping, surveying and mapping in difficult areas and other fields are important means and equipment for surveying, mapping and aerial photography in my country. Aerial photogrammetry technology requires a sufficient number of ground control points to meet the needs of mapping calculation and accuracy, but in difficult areas such as western plateaus, islands (reefs), or where natural disasters occur, ground personnel cannot enter the measured control points, and there is no need for calculation. initial conditions, making aerial photogrammetry of these ar...

AI Technical Summary

Problems solved by technology

Aerial photogrammetry technology requires a sufficient number of ground control points to meet the needs of mapping calculation and accuracy, but in difficult areas such as western plateaus, islands (reefs), or where natural disasters occur, ground personnel cannot enter the measured control points, and there is no need for calculation. starting conditions, making aerial photogrammetry of these areas difficult to implement

[0003] In the existing UAV aerial photography technology, the global satellite navigation system (GNSS) technology is a common single-frequency navigation measurement method, with a positioning accuracy of about 10 meters and an output sampling rate of 4HZ, which can only complete route guidance and tracking and isometric Exposure control cannot accurately record the trajectory, so it is impossible to obtain precise exposure point position coordinates; at the same time, the UAV aerial camera has no exposure pulse output function, so it is impossible to record the instantaneous signal of exposure

Summing up the above two points, the existing UAV aerial photography technology cannot realize sparsely controlled UAV aerial photogrammetry

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