Airborne inclined laser three-dimensional measurement and composite imaging system and using method thereof

Abstract

The invention provides an airborne inclined laser three-dimensional measurement and composite imaging system and a using method thereof. The airborne inclined laser three-dimensional measurement and composite imaging system comprises a servo scanning subsystem installed on a flying platform, a multi-beam laser radar subsystem, a visible light camera and a GNSS / IMU integrated navigation unit connected with the servo scanning subsystem, wherein the multi-beam laser radar subsystem and the visible light camera are installed on the servo scanning subsystem. Synchronous observation of a ground target by the multi-beam laser radar and the visible light camera is realized by adopting a mode that the multi-beam laser radar, the visible light camera and the scanning mechanism cooperatively work under the synchronization of pulses per second output by the GNSS / IMU integrated navigation unit; the problem of full-time inclined / vertical high-resolution imaging three-dimensional measurement of a target area under the airborne platform is solved; by adopting a framework of diffraction element beam splitting, array optical fiber receiving and array single-photon detector detection and combining aone-dimensional scanning mechanism and platform movement, the ground resolution and the imaging efficiency are both considered while the radar operating distance and the measurement precision are ensured.

Description

technical field [0001] The invention relates to the general technical field of image data processing or generation, in particular to an airborne oblique laser three-dimensional measurement and composite imaging system and a method for using the same. Background technique [0002] Basic geographic information is one of the information resources with the largest amount of data, the widest coverage and the widest application in our country. It can be used in military reconnaissance, battlefield environment monitoring, national security, national economy, social development and many other fields. How to obtain the basic geographic information data of the target area in a large range, high resolution, high precision and fast is an important strategic research direction of various countries. [0003] As an emerging 3D data acquisition method, 3D imaging lidar can quickly acquire terrain surface data, features of ground objects, etc. It is a high-precision, high-density, high-effi...

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Problems solved by technology

[0006] The present invention aims to solve the problem that it is difficult to acquire high-resolution, high-precision, and high-efficiency three-dimensional information, and provides an airborne tilted laser three-dimensional measurement and composite imaging system and its use method. By using multi-beam laser radar, visible light camera and The way the scanning mechanism works together under the second pulse synchronization output by the GNSS / IMU integrated navigation unit realizes the simultaneous observation of the ground target by the multi-beam lidar and the visible light camera, and solves the problem of the all-day tilt / vertical height of the target area under the airborne platform. Resolution imaging stereo measurement problem; by adopting the structure of diffraction element beam splitting, array optical fiber receiving, and array single-photon detector detection, combined with one-dimensional scanning mechanism and platform movement, while ensuring the radar range and measurement accuracy, it also takes into account the Ground Resolution and Imaging Efficiency

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