Research on on-board fusion positioning system and accuracy correction algorithm in subway tunneling
The"Metro Tunnel Safety Hidden Danger Comprehensive Inspection Vehicle"offers quick and accurate inspection of subway tunnel linings and potential hazards.Traditional positioning technologies in tunnels face issues like low accuracy and data sync problems due to complex underground and structural environments.To address this,a new on-board fusion positioning system with an accuracy correction algorithm has been developed.This system includes precise coded data and image acquisition,a fusion positioning algorithm,an accuracy correction algorithm,and a multi-source information coordinate conversion matrix.This fusion positioning system is more accurate than existing methods,capable of fast and dynamic positioning in both straight and curved tunnel sections.It achieves a positioning accuracy of 10 cm,with a relative error of less than or equal to 0.06%over up to 300 m in straight and 100 m in curved sections.The system's effectiveness and stability are confirmed by indoor and outdoor tests,making it a valuable tool for rapidly detecting and locating hidden safety hazards in subway tunnels,thereby enhancing tunnel safety.
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维普
