LEGO Lidar Part 3: Scanning for Intruders
The LIDAR-Lite v3 has interesting applications in security monitoring. By scanning the lidar beam a wide area
can be monitored to not only detect an intruder, but also determine the intruder’s location. As a demonstration, I used the
scanning setup showed in my post “LEGO Lidar” with the software interface in my other post “LEGO Lidar Part 2: I2C Interface.”
I scanned a section of my backyard, which as seen in the photo below, has many features of bushes, trees, and structures.
In the image above are two scans: 1) a background scan (green dots) showing ordinary features of the yard and 2) a later
scan detecting an object not normally in the yard. The lidar beam is scanned in this example through 120-degrees of angle
in 1-degree increments. A faster scan could be used to detect quick moving intruders, by scanning only a few look angles.
Further refinement could be made to track an intruder once it’s discovered.