Three-dimensional laser scanner fixing mechanism, and subway tunnel acquisition system and method

Abstract

The invention provides a three-dimensional laser scanner fixing mechanism, and a subway tunnel acquisition system and method. The subway tunnel acquisition system comprises a three-dimensional laser scanner fixing mechanism, a railway car module, a range sensor, an RFID reader-writer and a host computer. A three-dimensional laser scanner continuously acquires point cloud data of tunnel segments, the range sensor acquires mileage data in real time and transmits the mileage data to the host computer, the RFID reader-writer returns read and written RFID smart tag signals to the host computer in real time, and the host computer complete multi-source data fusion and storage. According to the invention, the problem that when the three-dimensional laser scanner is in a profile scanning mode, an automatic motor cannot be locked is solved, and damage to the scanner caused by maloperation is avoided. By means of the integrated design of two modules including the constant-speed railway car and the three-dimensional laser scanner, the quality of acquired data is improved, automatic acquisition of tunnel deformation data and disease information is achieved, the labor cost is reduced, and the detection efficiency is improved.

Description

technical field [0001] The invention relates to the field of subway tunnel detection, in particular to a three-dimensional laser scanner fixing mechanism, a subway tunnel acquisition system and method. Background technique [0002] 3D laser scanning technology is also known as real scene replication technology. The 3D laser scanner uses a horizontal automatic motor with good stability and precision, which can measure the 3D coordinates and laser reflectance values ​​of all objects in the visible scene. The laser transmitter lens of the 3D laser scanner rotates in the vertical plane, and at the same time, the automatic motor drives the scanner body to rotate in the horizontal direction to complete 360° 3D scene scanning. [0003] The 3D laser scanner also has a section scanning function. The laser emitter rotates in the vertical plane, and the 3D laser scanner does not rotate in the horizontal direction. This function is often used for mobile scanning in the tunnel to monitor...

AI Technical Summary

Problems solved by technology

[0010] At present, the traditional manual measurement of tunnel convergence deformation and manual inspection of tunnel ring defects have low measurement efficiency and high labor costs, which are not suitable for the gradually shortened nighttime operation window of the current subway operation.

[0011] The current automatic acquisition system collects images for the combination of multiple cameras, and the overall accuracy is affected by the combined positioning accuracy of multiple cameras

Images