Introduction
Interactive walls are becoming a powerful tool in exhibitions, education, entertainment, and retail environments. From city development showcases to children’s gaming zones, users demand precision touch recognition and seamless interaction—even on walls stretching up to 10 meters or more.
A critical decision when designing such systems is whether to use a single PoE LiDAR sensor or a cascaded multi-LiDAR setup. While both approaches have their place, their performance in terms of accuracy and blind spots can differ significantly.
Single PoE LiDAR on Long Walls
A single PoE LiDAR sensor relies on its field of view (FOV) and scanning resolution to detect interaction.
Limitations:
- Blind Spots at Edges & Corners: The limited viewing angle may leave gaps, especially on a 10-meter wall.
- Reduced Accuracy: Data points are sparse across longer distances, making touch precision less reliable.
- Fixed Field of View: A single sensor’s coverage is constrained by its built-in scanning angle and range.
Best Use Case: Shorter walls (under 5 meters) or compact interactive installations where one sensor provides sufficient coverage.
Cascaded PoE LiDAR: A Scalable Solution
When multiple PoE LiDAR units are cascaded, they combine their fields of view and data points for a more complete wall coverage.
Advantages:
- Minimized Blind Spots: Overlapping scan areas reduce gaps and eliminate dead zones.
- Higher Accuracy: Fusion of multiple point clouds increases spatial resolution and precision.
- Flexible Coverage: Adaptable to straight walls, L-shaped corners, curved surfaces, or segmented panels.
- Scalability: Expandable design suitable for walls beyond 10 meters without compromising accuracy.
Best Use Case: Large-scale walls in exhibitions, sports games, or immersive digital showcases where precision and reliability are crucial.
Comparison: Single vs. Cascaded PoE LiDAR
| Feature | Single PoE LiDAR | Cascaded PoE LiDAR |
|---|---|---|
| Coverage | Limited by FOV and range | Extended with overlapping fields |
| Accuracy | <5 cm only in shorter setups | <5 cm maintained on long walls |
| Blind Spots | More likely at edges & corners | Minimized through multi-sensor fusion |
| Scalability | Suitable for small walls | Ideal for 10m+ large installations |
| Complexity | Easier installation | Slightly more setup but scalable |
Applications of Cascaded PoE LiDAR Walls
- Exhibition Halls & Showrooms: Interactive city planning or architectural visualization
- Shopping Malls & Play Zones: Children’s touch games and family entertainment
- Education & Museums: Interactive learning displays for history, science, or art
- Sports & Gaming Arenas: Wall-ball games, reaction training, and shooting simulators
FAQs
Q1: Do I always need multiple LiDAR sensors for a long wall?
Not always. For shorter walls (under 5m), a single PoE LiDAR may suffice. For 10m or longer walls, cascading is highly recommended to maintain precision and reduce blind spots.
Q2: How accurate is cascaded PoE LiDAR?
With proper installation, cascaded setups can maintain a typical touch accuracy of <5 cm across long walls.
Q3: Is cascading difficult to install?
No. CPJROBOT PoE LiDAR sensors support IEEE 802.3AF PoE, enabling simple cabling for both power and data. Multiple units can be easily connected and synchronized.
Q4: Can cascaded LiDAR handle irregular wall shapes?
Yes. The system can adapt to L-shaped, curved, or segmented walls by strategically placing sensors for full coverage.
Q5: What software environments are supported?
CPJROBOT PoE LiDAR is compatible with Unity, C#, C++, and supports TUIO and Windows multi-touch protocols, making integration straightforward.
Conclusion
For long walls of 10 meters or more, relying on a single LiDAR sensor may lead to blind spots and reduced accuracy. By contrast, cascaded PoE LiDAR solutions provide seamless coverage, precise multi-touch detection, and scalability for future expansion.
If your goal is to create immersive, high-performance interactive walls, CPJROBOT’s PoE LiDAR systems deliver the most reliable foundation.
Ready to design a long-wall interactive system without blind spots?
Contact CPJROBOT today to explore our advanced PoE LiDAR solutions—trusted worldwide for interactive projection systems, navigation robots, and custom applications.
