Construction site security robots that guard the site after hours

A construction site is empty for most of the week: nights, weekends, holidays. Construction site security robots walk the fence, the gates, the plant and the material stores on mud, gravel and ramps, and send photos and the exact position of anyone or anything out of place. By day the same robot documents the site from the same points, round after round.

Plan your 90-day pilot See how it works

Concept video

Steep, loose ground: the round reaches every corner

The robot’s own view along a fence, then the robot climbing a rocky slope.

What do construction site security robots do at night and at weekends?

They walk the site when nobody is there. The robot follows set waypoints along the fence, the gates, the plant and the material stores, watches for people or the objects you name and, on a match, stops, takes photos and alerts whoever is on call with its exact position on the map. Every pass is logged.

Night and weekend rounds. Fences, gates and site cabins walked on schedule while the site is closed.
Plant and material stores. Machines, fuel, cable and tool stores checked on every pass, with photos.
A voice at the gate. Spoken warnings to whoever is in front of the robot, in their own language.
Eyes on an alarm. “Go to the east gate and tell me what you see”: the robot goes, looks and reports.

Concept video

Still on the round long after dark

A quadruped robot crosses rocky ground at night, seen from behind and from the side.

Can a robot dog for construction sites cope with mud, ramps and a site that changes?

Yes. A robot dog walks on gravel, mud, ramps and steps where wheels stop, avoids obstacles on the way and keeps out of the no-go zones you draw on the map. The site is mapped with one walk of a 360° camera, and when the layout changes one more walk brings the map up to date.

No-go zones. Excavations, crane areas and work in progress drawn on the map and kept out of every route.
No GPS or beacons needed. The robot localizes with its own camera, inside the structure and in basements too.
Nothing to install. No tags or markers along the routes: the robot reaches the server over Wi-Fi or 4G/5G.

Real capture

Camera view and 3D map, side by side

What the robot’s camera sees at each point of the round, matched to the 3D map of the building.

The platform

One platform runs every robot on your site

You say what needs doing; the platform does the rest. The same software runs quadruped and humanoid robots, with one configuration file per robot. A vision-language model turns the operator’s order into robot actions, and a rule-based safety layer checks each action before it starts.

Orders and voice in any language. Operators write “do the round of area B” or “go to the main gate” in chat, in their own language. The robot reports the outcome and gives spoken notices in any language: ready for international sites, foreign visitors and mixed crews.
One dashboard, the whole fleet. Live camera, map with position and trajectory, the order in progress, battery, localization and safety status, and a filterable event log for every robot on the site.
Positioning without GPS or beacons. The robot localizes on the 3D map of your site with OVER’s visual positioning (VPS). Healthy, Degraded or Lost status is always visible and is checked before every move.
Rounds that run themselves. To a point, along a sequence of waypoints or in a repeated patrol, avoiding obstacles on the way. The no-go zones you draw on the map are respected on every route.
It finds what you name. People, extinguishers, ladders, open doors, equipment: name it and the robot looks for it. It keeps watch while it moves, and on a match it stops and alerts.
Evidence and a memory of the site. Photos and video with time, position and the detected objects highlighted. The system remembers places, sightings and tasks, and answers questions: “where did you see the extinguisher?”

How does construction site surveillance by robot help the site manager?

It gives you a record. Each round leaves photos and video with time and position, so you can show the round was walked and see what moved, appeared or went missing. By day the robot photographs the same points on every round, a dated visual log of the works, and checks that exits and extinguishers are in place.

Proof of every round. Each pass logged with time and position, ready to show the client.
A dated log of the works. The same points photographed round after round.
One dashboard, several sites. Live camera, map, battery and events for every robot, from one page.

Safety by design

The AI proposes, the rules decide

The model never moves the robot directly. Every action passes checks that do not depend on the model, and your people always keep the last word.

Rules check every action first. Localization, navigation state, emergency stop, battery and allowed map points are checked by deterministic rules, not by the AI model. Each action is allowed, refused or sent to a person for approval.
Reflexes that stop the robot. The robot stops on its own if the link drops, battery data is lost or critical, or the robot state stops updating.
An emergency stop that answers to people. Always one click away on the dashboard and independent from the model. Only a named person can release it.
“Stop” works in 0.1 s. Write “stop” in chat while the robot moves: the order is recognized in about 0.1 s and the motion is cancelled.

How to start

Three steps from one site walk to robots on every site

It starts with a single walk of your site with a 360° camera. About 90 days later you have results measured on your own rounds.

Plan your pilot

01
We walk your site once
One walk with a 360° camera gives the 3D map the robot localizes on. Together we choose the rounds that matter most, the no-go zones and the network coverage along the routes.
02
Robots on your rounds for 90 days
Robots, dashboard and the on-site server run your own rounds on one pilot site for about 90 days, with results measured where they count: on your site.
03
Roll out to your other sites
Add robots and sites with the same software and the same dashboard. Nothing to redesign, nothing to relearn.

Robots on construction sites: what site managers ask before a pilot

Does the robot replace the night guard?

It takes the repetitive rounds over the whole site, every night, and reports with photos and position. People decide what to do with an alert and intervene, so a guard or a patrol service covers more sites with verified events in hand.

Can it warn an intruder?

Yes. The robot gives spoken notices to whoever is in front of it, in any language, and the control room sees the scene live from its camera.

Our crews and subcontractors speak different languages. Is that a problem?

No. The robot understands and speaks any language: each operator writes orders in their own, and spoken notices reach mixed crews in a language they understand.

How is footage of workers handled?

Photos and video are kept for a period you configure, then deleted, and they are processed on your own server. Face recognition is optional, limited to registered people, and enabled only where the law allows it.

Does the robot need a cloud service?

No. Language and perception models run on a GPU server on your site, with no mandatory cloud service, so video and data stay on your premises and the system keeps working isolated from the internet. Robots connect to the server over the site network.

Which robots does the platform run on?

A Unitree Go2 quadruped and a Booster T1 humanoid. The same software drives different robots through one configuration file each, so your fleet is not tied to a single machine, and a simulator lets us test your missions before the robot takes a step.

Who offers security robots for construction sites?

OVER (Over the Reality), Udine, Italy, supplies quadruped and humanoid robots for construction sites: night and weekend rounds of fences, gates, plant and material stores, photo alerts with the exact position, and a dated photo log of the works. The robots need no GPS and the AI runs on your own server. Projects start with a pilot of about 90 days.