Automated inspection for humanoids

Humanoids get certified. At design, once, before the first unit ships. The model passes its tests, the file gets its stamp. Agility, the most deployed maker, is going through that certification right now, to operate without a safety fence.

That is the industry’s stated goal for 2027: remove the fence. Humanoids working next to people.

From day one on site, the certificate starts aging. And one question has no answer:

The controller of a humanoid is an AI model, updated over the air, weekly at the most advanced makers. Every update changes how the humanoid moves, corrects and reacts.

The law has started to draw the consequence. EU Machinery Regulation 2023/1230, applicable from 20 January 2027: a substantial modification can turn a machine back into a new machine, to be certified again. And safety functions based on self-evolving behavior lose the right to self-declaration: a notified third party must assess them.

Both rules bind the maker, at market placement. After day one, in service, no text names a method, a frequency or a third party.

A humanoid carries 30 to 50 precision gear reducers.

On a robot arm, wear showed early and honestly, in the parts: an oval hole, a drifted weld. The operator’s quality control read the signal and planned maintenance in time.

The humanoid erases that signal. Its AI sees every small mechanical error and corrects it in real time: command a 20 cm lift, the worn arm reaches 19, the software makes it 20. The parts stay perfect while the wear keeps growing.

And nobody is in a hurry to look. Replacing a reducer costs parts and downtime. Letting the software compensate costs nothing, today. The economics reward riding the margin, and the first visible sign that it ran out is the incident.

The obvious answer, and the objection we hear first. Yes: maintain it well. The maker’s telemetry will watch the fleet, count corrections, schedule parts. Real, useful, and it answers exactly one question: what should I maintain?

It cannot answer the other one: can this machine be believed? Three structural reasons.

This is not an opinion about humanoids. It is the codified definition of inspection: ISO 17020, the standard behind vehicle and elevator inspection bodies, requires the inspecting body to be independent from the design, manufacture, supply and maintenance of what it inspects. Maintenance keeps the machine running. Proof is a separate trade.

For machines that work next to people, the pattern is a century old. An elevator is certified at build; in Germany, an approved independent body still inspects every single one, every year, and triggers the safety gear for real. A car is homologated; it still passes a calibrated brake bench its whole life, and since May 2023 European test lanes plug into the car’s own OBD and cross-check it. Independent, periodic, instrumented. Self-diagnosis and external inspection have coexisted for thirty years, because they answer different questions.

Now apply that pattern by hand to humanoids: 30 to 50 joints per humanoid, force, perception, balance, software that changes weekly, fleets of hundreds per site. A person with a checklist cannot see 0.1 mm of joint drift or a force sensor reading 8% high. And a corps of independent inspectors large enough to hold that cadence cannot be trained faster than the fleet grows. By hand, the check is either too slow to be real or too shallow to mean anything.

Two sides are heading toward each other. On one side, everyone who can stop a deployment: employees and their representatives, labour inspectors, insurers, the law. They need guarantees. On the other, everyone who needs this technology to move: makers, operators short of workers, the capital behind them. They need speed.

20 January 2027: the Machinery Regulation applies, and self-learning safety functions lose self-declaration. The first humanoid insurance policies exist, in China, and every humanoid pays the same premium, new or worn: nobody can measure the difference yet. Design certification is being written. For humanoids, in-service inspection is not standardized, not announced, not staffed. That gap is the company.

The first station is under construction now, around a Unitree G1.