Autonomous Mowers

The pattern is accumulated, not revealed — it has to actually mow

A deployment, from the fairway: truck in, three units out, the ground gets read.

What this is

Fleet mowing for grounds that are a catalogue of the ways land can be difficult — water, sand, tree lines, people. A truck deploys units to assigned zones; each reads the ground and bends its lanes around what it finds, holding when someone crosses and resuming when they have passed. Hi-vis hulls and soft bumpers make the failure mode a nudge, not an incident. One operator, many acres, clean stripes by dusk.

The technical shape

Fleet model: truck-deployed units · per-zone assignment · single visible operator
Autonomy: terrain-aware steering — water, bunkers, canopies, moving people
Safety story: hunter-vest visibility · soft rubber bumper · holds for pedestrians
Machine: industrial deck width, drive wheel, rear e-housing, beacon mast
Stage: systems design · deployment choreography validated in simulation

The deep end · full technical outline

Outline v2 · expanding

Fleet choreography

One truck, several units, one operator. Units deploy to assigned zones with deliberately offset work phases so they occupy different depths of the ground at any moment; the parked truck registers as a steering obstacle like everything else. Zone gaps and phase offsets are what keep a fleet from reading as bumper cars.

Reading the ground

Lanes are nominal; the terrain gets a vote. Steering is a repulsion field around hazards — water, bunkers, canopies — so stripes bend around what is actually there and settle back, rather than ruling themselves across a map that was wrong. Pedestrian proximity pauses a unit’s work clock entirely: it holds, beacon quickened, and resumes when clear.

The safety story

Visibility first: hunter-vest hulls, a beacon mast, a headlight bar. Compliance second: holds for people, not swerves. And the worst case is engineered soft — a dark rubber bumper on a slow machine. It sees you and stops; if everything fails, it is a nudge.

Descended from the Roomba

The premise is a robot vacuum scaled up and let outdoors. A Roomba already senses overhangs so it will not fall down the stairs, docks itself, empties itself, and runs with no programming required — do nothing and it works. Take that and strip the rider off a commercial zero-turn: the seat, the control levers, the roll bar all come off (a large weight saving before anything else), and the oversized tires shrink to lightweight wheels. What is left is rebuilt symmetrical — not a doughnut bisected by a ham chop — so performance is even all the way around, with two Roomba-style half-bumpers taking contact softly.

Blades and edges

The cutting deck sits inside the machine’s circumference by default — nothing spins past the bumper line as it drives — and extends beyond that line on demand for the close-to-object, high-quality edge trim a human currently does by hand. One machine both mows the open field and finishes the borders, instead of trading a rider for a second pass with a strimmer.

Autonomy and docking

Lidar and GPS place and route each unit — the same navigation lineage as warehouse robots and self-driving cars — while overhang and edge sensing keep it from dropping off a ledge. It runs fully autonomous, or shadowed by a single attendant tracking the whole fleet from the vehicle that hauls the equipment site to site; that vehicle is where units return to self-dock and self-empty between zones.