A simulation system for oblique aerial photography with six degrees of freedom

Abstract

A simulation system for oblique aerial photography with six degrees of freedom is disclosed. The simulation system comprises a guide rail system, a cradle head mechanism, an imaging device and a control device. The guide rail system comprises four linear guide rails. The cradle head mechanism adopts a spherical surface structure and comprises a static platform, a movable platform and three branch mechanisms in parallel connection between the static platform and the movable platform. The three branch mechanisms are same in structure and are evenly arranged along the peripheral direction. The static platform is vertically and slidably connected to the fourth linear guide rail. The imaging device comprises a CCD camera fixedly mounted to the bottom of the movable platform. The control device operably controls movement of the cradle head mechanism on the guide rail system and movement of the CCD camera on the cradle head mechanism. The simulation system can simulate oblique aerial photography processes with any track and any attitude.

Description

technical field [0001] The invention relates to an aerial photography simulation system, in particular to a six-degree-of-freedom aerial tilt photography simulation system. Background technique [0002] Aerial photogrammetry refers to the operation of continuously taking pictures of the ground with aerial photography instruments on the aircraft, combining the steps of ground control point measurement, surveying and mapping, and three-dimensional surveying and mapping to draw topographic maps. Aerial photogrammetry has always been the main way of forming basic maps in my country. Due to its fast drawing speed, high precision and uniformity, it is an important development direction of our digital mapping in the future. With the widespread acceptance of Digital Earth in China, the construction of digital cities is in full swing. Aerial digital measurement provides basic urban spatial data for digital city construction, and is also widely used in land and resource surveys, land...

AI Technical Summary

Problems solved by technology

Based on this requirement, Chinese patent 201310298803.5 discloses an aerial photogrammetry simulation system that can simulate the movement of aircraft in a fixed horizontal plane. However, since the entire simulation system cannot adjust the attitude of the aircraft, this system cannot meet the research needs of oblique aerial photography.

Chinese patent 201220681352.4 discloses a digital aerial tilt photogrammetry device, which installs five cameras on the cloud platform according to the five directions of front, rear, left, right, down, to realize tilted aerial photography. However, if a related tilted aerial photography simulation system is developed based on this idea, has the disadvantage of high cost

Moreover, due to the large number of cameras, the overall quality of the gimbal is relatively large, which is not conducive to the smooth control of the gimbal

In addition, Chinese patent 201210501131.9 and Chinese patent 201220646494.7 also disclose similar devices, but none of these devices can simulate the movement of the aircraft in the direction of six degrees of freedom, and cannot simulate the real pose changes of the aircraft

From the perspective of scientific research, the aforementioned systems or devices still lack the integrity of simulation information and the flexibility of route setting

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