Ground reference-free low altitude triangulation method based on GNSS/MEMS positioning and directioning

Abstract

The invention discloses a ground reference-free low altitude triangulation method based on GNSS/MEMS positioning and directioning. The method comprises combining GNSS and MEMS chips to obtain a combined chip module for synchronously acquiring and storing receiver data of a GNSS satellite and data transmitted through a MEMS sensor, carrying out post-observation processing and feedback compensation to obtain high precision position information and attitude angle information, acquiring a mapping coordinate system position through coordinate transforming software in a measurement zone, carrying out eccentricity correction and eccentric angle correction through the position information and attitude angle information as data of starting count, providing elements of exterior orientation for aerophotogrammetry and carrying out low altitude triangulation without ground control. The ground reference-free low altitude triangulation method reduces flight side overlap, improves work efficiency, reduces a cost, reduces outdoor work person workload in unmanned plane plotting and solves the problem that the existing unmanned plane plotting cannot guarantee a plotting precision through arrangement of a ground control point in an area with rough topography.

Description

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AI Technical Summary

Benefits of technology

This patented technology improves upon existing methods that use multiple sensors or external devices like radar systems to measure altitudes accurately over large distances while avoiding physical contact between them. It suggests developing an improved way to determine three dimensions (longitudinal, lateral) from two different sources - one uses geomagnetic signals and another uses satellite navigation signal strength measurements. By integrating these techniques into the aircraft itself instead of relying solely on its own capabilities, this new approach allows for more accurate 3D location measurement under difficult terrains conditions.

Problems solved by technology

Technological Problem: Current methods for measuring altitudes involve expensive equipment such as drones or monopods equipped with multiple lenses, making them less efficient at capturing smaller areas like urban environments due to their lack of flexibility and range limitations. Additionally, current methods require manual operation, leading to longer processing times and reduced efficiency when analyzing large areas where there may have many connections point within each section.

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