Developed by a Norwegian sensor startup Sonair, a safe 3D ultrasonic sensor — ADAR — designed to boost safety in spaces shared by humans and robots debuted at Automate 2025 this week.
Acoustic detection and ranging (ADAR), a patented innovation by Sonair, is a new category of 3D depth sensor. It empowers autonomous robots with omnidirectional depth perception, enabling robots to “hear” their surroundings in real-time 3D — using airborne soundwaves to interpret spatial information.
ADAR is developed according to ISO13849:2023 performance level d/SIL2. The sensor creates a virtual safety shield with a range of 5 meters, that enables people and robots to share space safely. The innovation lies in combining wavelength-matched transducers with efficient signal processing for beamforming and object recognition algorithms.
“ADAR is an advanced plug-and-play sensing technology ensuring compliance with safety standards. With its small form factor, and low power and compute consumption, it is easy to integrate as part of a combined sensor package,” explained Sonair CEO Knut Sandven. “It takes the ‘uh oh’ out of human robot coexistence and replaces it with an ‘all clear.’”
A typical 2D LiDAR safety scanner in an AMR only sees a person’s legs in one horizontal plane. In contrast, Sonair’s patented ADAR (acoustic detection and ranging) technology detects people and objects in 3D. A single ADAR sensor provides a full 180 x 180 field of view (FoV), and a 5 meters range, for the robot’s safety function.
“Safety just got a lot simpler — and better adapted to detect people,” said Sandven. “ADAR enables 3D 360-degree obstacle detection around autonomous mobile robots (AMRs) at a significantly lower cost than the sensor packages used today, enabling AMR manufacturers to build safe and affordable autonomous robots.”
The core technology behind ADAR has been in development at the MiNaLab sensor and nanotechnology research center in Norway for more than 20 years. The imaging method is called beamforming; it’s the backbone of processing for SONAR and RADAR, as well as in medical ultrasound imaging, and now ready for ultrasound in-air applications.
More than 20 global companies, including AMR manufacturers, industrial manufacturing conglomerates, automotive technology suppliers, and vendors within the autonomous health and cleaning industries, have quietly validated the Sonair ADAR sensor’s effectiveness as part of a successful Early Access Program launched in Summer 2024.
Commercial orders are already flowing, including from Japan's FUJI CORPORATION, which has procured ADAR for an upcoming line of AMRs. “Sonair combines rapid development capabilities with a flexible mindset, said Koji Kawaguchi, General Manager of the Innovation Promotion Department, FUJI CORPORATION. “Thanks to their cooperation, through comprehensive testing we were able to confirm the high suitability of their sensors for autonomous mobile robots.” Automate Booth #4710
For more information, visit www.sonair.com .
