Reconstruction device and reconstruction method of digital elevation model

Abstract

The invention provides a reconstruction device and reconstruction method of a digital elevation model. The reconstruction device comprises an arc foundation interference radar, the arc foundation interference radar comprises a rotating platform and an antenna unit; the antenna unit comprises at least two antennas connected with the rotating platform, the continuous arc movement of the antennas isrealized through the rotating platform; the antennas are used for the simultaneous transceiving of the signal, a radar original echo of an observation target region is observed through the antennas, and the synthetic aperture imaging processing is performed, thereby acquiring a single-lock complex image of the imaging region; the height of the rotating plate is adjustable and used for acquiring asingle-lock complex image sequence of the observation target region under different heights, and acquiring an interference image sequences under different heights; the joint phase unwrapping processing is performed on multiple groups of acquired interference image sequences, thereby acquiring the unwrapped phase diaphragm and accomplishing the precise reconstruction of the digital elevation modelthrough the conversion between the phase and the elevation.

Description

technical field [0001] The invention relates to the fields of radar development and safety monitoring, in particular to a digital elevation model reconstruction device and reconstruction method. Background technique [0002] Digital elevation model reconstruction technology is a high-precision and complex terrain surveying and mapping technology, which has important applications in military applications, anti-terrorism and stability maintenance, earthquake relief and other fields. According to its technical principles, there are mainly the following categories: one is photogrammetry technology, which restores the elevation information of the terrain by overlapping images from different perspectives; the second is based on lidar, which realizes three-dimensional monitoring of the monitored area through laser point cloud Reconstruction; the last category is the emerging interferometric synthetic aperture radar technology, which is realized through SAR image interference proces...

AI Technical Summary

Problems solved by technology

The invention adopts the arc-based ground-based synthetic aperture radar system, obtains large-scale high-resolution imaging results by performing arc continuous motion scanning and aperture synthesis technology in the horizontal distance, and realizes the interferometric phase under complex terrain by establishing multiple baselines in the height dimension Unwrapping effectively solves the problem of accurate and efficient reconstruction of digital elevation in large-scale complex terrain areas (such as jumps, cliffs, and steep slopes), and can realize three-dimensional display of regional deformation. This technology and device can be widely used in deformation-based ground monitoring systems middle

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