Hospitals are full of highly trained people walking down corridors carrying paperwork.
Files between departments. Samples to the lab. Equipment from one ward to another. Every trip is a few minutes. Add them up across a whole hospital, every day, and it’s hundreds of hours of nurses and doctors being couriers instead of doing the job only they can do.
That was the idea behind my final-year engineering project: a robot that does the walking.
What it does
The robot carries documents and critical medical equipment between departments. Someone loads it, sends it on its way, and it navigates the hospital to the destination on its own.
It won recognition and a grant from KSCST, the Karnataka State Council for Science and Technology, which for a student project felt like being told the idea wasn’t just a nice idea.
How it finds its way
The robot uses LiDAR (Light Detection and Ranging). A LiDAR sensor spins and fires laser pulses in every direction, measures how long each one takes to bounce back, and builds a map of the space around it. Walls, doorways, people and trolleys all show up as points on that map.
A Raspberry Pi, a small and cheap computer about the size of a credit card, acts as the brain. It reads the LiDAR data, works out where the robot is, and decides where to go next.
If that sounds familiar, it’s because it’s roughly the same technology inside a robot vacuum. Same idea: map the room, know where you are, don’t crash into things. We just pointed it at a much more useful job than finding crumbs under the sofa.
What I’d do differently
Now that I think about it, I might have started with an actual robot vacuum.
They’re mass-produced, cheap for what they contain, and already solve the hardest parts: navigation, obstacle detection, battery management and returning to base. Take one apart, repurpose the brain, put a carrier on top, and you’re most of the way there for a fraction of the effort.
Or go the other way and make it sweep the corridors as it delivers. A courier that also cleans. Every hospital manager’s dream.
At the time, building it from the ground up was the point, and I learned far more that way. But it’s a good reminder that the smartest engineering move is often reusing something that already works.
Where it fits
That project was my first real taste of the pattern I keep coming back to: find a boring, repetitive job that eats up skilled people’s time, and build something that does it for them. Back then it was a robot in a hospital corridor. Now it’s usually software. The instinct is the same.