Tunnel three-dimensional imaging method and system

Abstract

The present invention discloses a tunnel three-dimensional imaging method and system, and belongs to the technical field of traffic tunnel detection imaging. The laser scanning is combined with the ultrasonic fault detection technology, a mode that the relative position of a laser scanning imager and an ultrasonic transducer remains stationary and the optical axis of the laser scanning imager is parallel with the sound wave emission direction of the ultrasonic transducer is employed to measure the relative position of the ultrasonic transducer and the laser scanning imager, convert one-dimensional data represented by the reflection signals detected by the ultrasonic transducer, namely a depth result of a reflection surface to three-dimensional coordinates of the reflection surface and allow the three-dimensional coordinates of the reflection surface to correspond to the coordinate data of a tunnel surface point cloud model so as to integrate the three-dimensional coordinates of the reflection surface and the coordinate data of the tunnel surface point cloud model into the point cloud data obtained through laser scanning for common reconstruction and obtain a three-dimensional imageincluding the tunnel surface and deep layer construction.

Description

technical field [0001] The invention belongs to the technical field of detection and imaging of traffic tunnels, in particular to a method and system for three-dimensional imaging of the appearance and interior of traffic tunnels, and is mainly oriented to the three-dimensional imaging of the combination of defects on the surface of the tunnel and behind the tunnel segment. Background technique [0002] In modern times, with the development of computer graphics technology, it has become normal to draw three-dimensional design planning drawings in the early stage of traffic tunnel design. The tunnels built earlier with hand-drawn drawings can also obtain electronic drawings through computer copying and drawing, and then carry out three-dimensional modeling. However, due to the early birth of trains, a large number of train tunnels in our country were built before the birth of computer graphics technology, and a considerable part of the train design drawings have been lost due...

AI Technical Summary

Problems solved by technology

During the operation period, due to the long total mileage of some tunnels and scattered disease occurrence points, manual inspection can no longer meet the needs of daily maintenance and repair of tunnels

[0004] Traditional detection methods such as laser scanning can only perform three-dimensional modeling on the surface of the tunnel, while ultrasonic detection methods can detect defects behind tunnel segments, but existing ultrasonic detection technologies only focus on detecting the approximate location of defects, and require Inspectors have rich experience to judge the type and approximate shape of the defect, and lack the corresponding means to form a 3D image, resulting in the inability to perform 3D modeling of the grouting layer and soil layer behind the tunnel segment and defects

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