Rapid mobile inspection equipment for metro tunnels based on multi-sensor integration

Area of Science:

• Civil Engineering
• Geotechnical Engineering
• Tunnel Engineering

Background:

• Tunnel inspection is crucial for operation and maintenance.
• Current laser scanning and CCD camera systems have limitations in data acquisition.
• Existing methods struggle with crack detection or point cloud generation for deformation analysis.

Purpose of the Study:

• To develop an integrated mobile device for comprehensive tunnel inspection.
• To address synchronization issues between different sensor types.
• To improve the accuracy and efficiency of tunnel data collection.

Main Methods:

• Development of the CKY-200 mobile three-dimensional inspection device with integrated multiple sensors.
• Implementation of algorithms for tunnel deformation detection and crack width measurement.
• On-site experiments and comparative analysis to verify data accuracy and device performance.

Main Results:

• The CKY-200 device successfully integrates multiple sensors, addressing temporal and spatial synchronization challenges.
• The proposed algorithms accurately detect tunnel deformations and measure crack widths.
• On-site experiments confirmed the CKY-200's ability to acquire comprehensive, high-precision, and high-speed data.

Conclusions:

• The CKY-200 offers a superior solution for tunnel inspection compared to existing technologies.
• The device enables more comprehensive data acquisition, crucial for effective tunnel maintenance.
• The integrated system ensures high precision and speed in assessing tunnel structural integrity.