TRW develops 24GHz based collision mitigation braking system

TRW has unveiled its Collision Mitigation Braking (CMB) technology which provides drivers with additional braking support in the event of an imminent collision with a moving or stationary object. The system is primarily designed for urban driving conditions including heavy traffic.

The system uses a radar sensor to directly measure the distance and relative speed to objects in front of the host vehicle. If a potential collision is identified, a warning is triggered to alert the driver; this warning can be audible, visual or haptic.

If the driver does not react to the warning and the system determines that a collision is likely to occur, a certain amount of brake pressure can be applied automatically to slow the vehicle and reduce the severity of the impact. If the driver does respond to the warning and depresses the brake pedal, the brake system will automatically provide maximum brake boost to slow the vehicle as quickly as possible and mitigate the collision. With the development of TRW’s 24GHz radar, this technology is now more affordable than ever.

Dr. Alois Seewald, director engineering for integrated active and passive safety technologies at TRW, explained: “Radar has, until now, been regarded as a luxury option, but TRW’s AC100 24 GHz product is roughly half the price of 77GHz radar: bringing the benefits of advanced safety, such as Collision Mitigation Braking for city driving to a wider vehicle market.

“The breadth of feature offerings, combined with the fact that radar technology can operate in all weather conditions, makes 24GHz radar an ideal choice for vehicle manufacturers, compared to alternative technologies such as Lidar-based systems that offer limited functionality and diminished performance in poor weather due to the need for a clear optical path.”

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