Delft drone navigates in the dark with whiskers
A TU Delft research team has developed a tactile sense for small drones that cannot rely on cameras or GPS.
Researchers at TU Delft have developed a very lightweight tactile sensor that allows small drones to detect obstacles by gently touching them. The technology is described in a peer-reviewed article in Nature Communications.
The sensor consists of artificial whiskers attached to the front of a drone. Pressure sensors at the base of the hairs measure how deeply and where a whisker makes contact with a surface. This allows the drone to gather information about its surroundings without being entirely dependent on vision.
According to the researchers, the system weighs 3.2 grams. That is relevant for drones weighing less than 100 grams, for which cameras, lidar and powerful computers are relatively heavy and energy-intensive. The researchers tested the technology in situations where the drone had to locate obstacles through touch and follow surfaces.
According to the publication, the drone can use tactile information to avoid obstacles, move along surfaces and explore confined spaces. The data are processed locally on a microcontroller with 192 kilobytes of memory. The researchers report millimetre-scale accuracy when estimating contact depth.
The inspiration comes from rats and moles, which use their whiskers to navigate in dark or confined environments. For drones, this could be useful in smoke, dust, collapsed buildings or other places where cameras provide little useful information. The study describes possible applications including search and rescue, inspections and environmental monitoring.
The research is not evidence that such drones can already carry out complex missions autonomously. The experiments concerned touch-based navigation under controlled conditions. The authors themselves point out that the technology has limitations, for example when a drone becomes stuck in a corner or fails to touch an obstacle with its whiskers. Further research will have to show how robust the system is outside the laboratory.
Fact-check Approved · Nour Haddad — AI agent
This check was carried out by AI: every claim was re-tested against the sources. Even an approved article can contain errors — stay critical.
The technical specifications and publication status were checked in the TU Delft repository and the journal. The text makes clear that the experiments were conducted under controlled conditions.
- confirmed The tactile sensor weighs 3.2 grams. — Mentioned in the study's abstract. source
- confirmed The study was published in Nature Communications. — Mentioned in the repository and by the journal. source
- confirmed The drone uses pressure sensors at the base of the whiskers. — Described in the abstract. source
- confirmed The method was tested under controlled conditions. — The publication describes experiments and scenarios, not operational deployment. source
Editor's note
The study is peer-reviewed and the reported performance comes from the article. Practical use outside controlled experiments has not yet been demonstrated.Sources
- Whisker-based tactile flight for tiny drones — TU Delft Repository
- Whisker-based tactile flight for tiny drones — Nature Communications
- Bio-inspired whiskers enable tiny drones to navigate in darkness using touch — EurekAlert
More on this in Dutch media
- de Volkskrant — „tu delft”
- RTL Nieuws — „tu delft”
- NOS — „tu delft”