LiDAR and SLAM perform different roles
Autonomous mobile robots need to understand where they are, what surrounds them and how to progress through an approved operating area. LiDAR sensing and SLAM are commonly discussed together, but they are not competing technologies.
LiDAR is a ranging technology. SLAM is the mapping and localization problem that can use LiDAR observations as part of the navigation process. The exact sensor arrangement, algorithms and control architecture depend on the selected AMR and project configuration.
What is LiDAR?
LiDAR uses emitted light and measured returns to estimate distances to surrounding surfaces. On a mobile robot, scan data can help represent environmental features and support functions such as mapping, localization and obstacle detection.
LiDAR is not a complete navigation system by itself. Vehicle control, localization, route planning, safety functions and other sensors or software may also contribute to the complete operating system.
What does SLAM mean?
SLAM stands for simultaneous localization and mapping. It describes the problem of building or updating a representation of an environment while estimating the robot's position within it.
For an industrial AMR project, an initial mapping and commissioning process can establish the operating environment. During operation, the navigation system uses observed environmental information to estimate the vehicle's location relative to its map and planned route.
A simplified navigation workflow
- The sensor measures surrounding environmental features.
- Mapping software represents relevant features in the operating area.
- Localization compares current observations with the mapped environment.
- Route-planning and motion-control functions use that position estimate to progress toward an assigned destination.
- Detection and safety functions respond according to the vehicle configuration and validated operating rules.
What Laser SLAM changes at the facility
Laser SLAM navigation can reduce reliance on fixed floor guidance such as embedded wires. It does not remove the need to prepare the facility. A workable deployment still depends on the actual floor, route, traffic, load, pickup and delivery interfaces, charging plan and operating procedures.
Large layout changes, obstructed mapped features, reflective or transparent surfaces, dust, debris and uncontrolled traffic should be considered during site assessment and validation.
Mapping and obstacle detection are not the same task
Mapping and localization help the robot estimate its position in the operating environment. Obstacle-detection functions monitor for objects or people relevant to the vehicle's configured detection areas. These functions may use related sensing hardware, but they should not be treated as interchangeable.
The current WFC product pages list Laser SLAM navigation, 5 m LiDAR obstacle detection and ±100 mm positioning accuracy. These catalogue values must be considered together with the complete site and application requirements; they are not a guarantee of project performance in every environment.
Questions decision-makers should assess
- Are floors clean, sufficiently even and suitable for the proposed vehicle and load?
- Are routes, turns, crossings and stopping areas physically adequate?
- Are mapped environmental features stable and observable?
- How will pedestrians, forklifts and other vehicles share the operating area?
- Are pickup, delivery and charging locations repeatable and controlled?
- What layout changes or temporary obstructions occur during normal operations?
- What validation and acceptance criteria will be used before production operation?
Navigation still requires project validation
AMR navigation should be evaluated as a complete system in the real facility. A site assessment, mapping exercise and pilot validation help confirm whether the proposed vehicle, route and operating rules are appropriate for the intended workflow.
WFC Systems can review the material movement, site conditions, traffic, interfaces and project objectives before recommending the next assessment step. Companies planning a new facility, warehouse expansion or automation project can also arrange a discussion or showroom demonstration before defining a pilot.
Explore WFC AMR technology →
Use the AMR site-readiness guide →
Technical background: WFC's approved product specifications and published NIST material on laser ranging, mapping, localization and autonomous mobile-robot navigation.