Autonomous Sweeper: Edge-Adaptive Cleaning Guidance and Ground Obstacle Detection

Scenario Requirements and Pain Points:
Unmanned cleaning vehicles primarily operate in outdoor settings such as parks, plazas, or sidewalks. To ensure comprehensive cleaning coverage, these vehicles typically perform “edge-cleaning”—that is, they drive closely alongside curbs. This poses extremely high demands on perception accuracy: the vehicle must not only identify the exact location of curbs to maintain its course but also prevent its wheels from scraping against them. Moreover, outdoor environments experience dramatic changes in lighting conditions—such as shadows cast by trees and intense sunlight—and often feature low stone pillars, steps (negative obstacles), or non-rigid debris like piles of fallen leaves. As a result, conventional sensors struggle to reliably distinguish between “debris that can be safely traversed” and “obstacles that must be avoided.”

Application Logic:
In the middle of the sweeping brush at the front of the unmanned cleaning vehicle, a T70 3D depth-imaging LiDAR is embedded and installed. The radar is mounted close to the ground and projects wide-angle 3D detection beams forward and to both sides.
Edge-following guidance: The T70 provides real-time, high-precision road surface depth maps. Its algorithm can clearly identify the height differences and orientation of curbs, enabling the vehicle control system to maintain centimeter-level edge-following distance and achieve thorough, dead-angle-free cleaning.
Road surface segmentation: By analyzing depth data, the system can effectively distinguish between flat road surfaces, raised obstacles (such as rocks), and sunken areas (such as steps), helping vehicles make decisions about detours or obstacle avoidance.

Technological Advantages:
The T70 employs dToF (direct Time-of-Flight) technology and boasts an impressive resistance to strong light, with a sensitivity of up to 100k Lux. It is completely unfazed by direct sunlight or reflections from the ground. With an ultra-wide field of view (FOV) of 90°×70°, a single unit can fully cover the sweeping width of the vehicle’s front end as well as the curb areas on both sides. Compared to conventional multi-line LiDAR sensors, the T70 delivers a dense, planar point cloud, offering superior detail resolution for curbs and low-lying objects. As such, it serves as the core perception sensor enabling highly precise operations for autonomous sweepers.

Keywords:

Category:

Mobile robot

Outdoor Automation

Road

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ILS-T70 3D Depth Imaging LiDAR

T70

All-solid-state 3D depth-imaging LiDAR—wide field of view, unafraid of strong light, the ultimate perception tool for outdoor autonomous vehicles.

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