GRAND15

The GRAND15 sewer scanner is designed to inspect the condition of underground sewer structures. Equipped with a 4K panoramic camera and integrated lighting system, it provides a clear view of the internal environment and supports the generation of multidimensional inspection data, including 3D point clouds, 3D models, high-resolution unfolded images, and panoramic videos, enabling both visual assessment and quantitative analysis throughout the inspection workflow.

Complete Visibility: Provides real-time inspection outputs, including 4K panoramic videos, high-precision 3D point clouds, detailed 3D models, and high-resolution unfolded culvert images. Captures the entire culvert structure from any direction and depth, with 360° panning and zooming, ensuring no detail is missed.

Precise Measurement: Using dual-objective scale recovery, achieving millimeter-level defect quantification with an accuracy of ±1–2%, allowing precise measurement of crack depth, clock position, dimensions, area, deformation, and irregular surfaces.

Intelligent Analytics: Multisource data fusion for engineering evaluation and maintenance planning. Integrated intelligent algorithms ensure image stabilization, while ultrasonic sensors prevent background contact, guaranteeing data reliability and operational safety. Each task generates structured, traceable, and reviewable reports.

Easy Operation: Compact and lightweight design allows transport by a single person and quick movement between sewers, with all operations controlled by a tablet.

This system supports sewer condition assessment, defect identification, rehabilitation planning, deformation monitoring, and post-rehabilitation verification, with seamless integration into GIS. Based on measurable data, it improves maintenance decision-making, cost control, and long-term asset management.