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Hyundai applies Radar to autonomous rear braking
- December 5, 2019
Hyundai Mobis has developed a new rear-autonomous emergency braking (R-AEB) technology using ultra short-range radar (USRR). The new technology is designed to prevent unexpected reversing or back-over crashes. The new system responds faster and has wider detection range than conventional ultrasound sensors.
R-AEB is a technology that detects humans or objects at the rear via sensors and forcefully stops the car if the driver does not step on the brake even after the alarm went off to prevent collisions.
Hyundai Mobis claims a world first in applying radar sensors instead of ultrasound sensors. Ultrasound sensors are typically applied to R-AEB systems, with cameras sometimes added to improve performance.
The concept was to apply radar in parking assist technology by removing stereotypes that radar is only used with autonomous driving technology. This enabled
Hyundai Mobis is attempting to address what it sees as R-AEB short-comings of ultrasound, which can be affected by wind or noise, and cameras, which can fail to identify objects in darkness.
To apply radar to parking assist technology, the company developed USRR. According to Hyundai Mobis, existing short-range radars are not sufficient to recognise objects in ultra-short range.
Hyundai Mobis says that while ultrasound sensors can detect objects up to 3m in rear parking, Hyundai Mobis’ USRR can detect up to 5m. Longer detection range allows proactive response since it is possible to predict unexpected collisions in advance. The system can detect distant objects in advance and deliver warning and emergency braking once the object comes in the effective collision range.
USRR can be installed inside the bumper and does not impair the aesthetic aspect of the bumper design. Existing ultrasound sensors often require drilling holes in the bumper.
Hyundai Mobis has verified the technology’s performance in driving in twelve situations, involving nearby pedestrians and objects, narrow parking spaces and detection of speed bumps. The new technology has satisfied Euro-NCAP and the US Insurance Institute for Highway Safety (IIHS) R-AEB test.
With raising concerns about reversing or back-over crashes, Europe will rate R-AEB in Euro-NCAP from next year, and the US National Highway Traffic Safety Administration (NHTSA) is currently preparing testing standards for the technology.
“Hyundai Mobis has successfully finished validation of performance reliability of the R-AEB equipped with USRR in ride testing,” said Cho Sung-woo, APS design director, Hyundai Mobis. “We will actively discuss the application and productions of the technology with domestic and foreign automakers.”