Continental to showcase new contact sensor that improves the safety of automated parking


Continental is closing a gap in the industry’s automotive sensor portfolio through developing the new Contact Sensor System (CoSSy).


This system detects low-speed contact between a vehicle and a person or an object.

At the Consumer Electronics Show (CES) in Las Vegas, Continental will demonstrate how CoSSy can help to make future use cases like automated parking even safer. Based on the sound signal picked up by CoSSy, a low-speed impact is detected so that the car can be brought to an immediate emergency stop. The new system provides a redundant signal path required by functional safety. It detects objects which may be located outside the short-range detection cone of other sensor types.

The scalable CoSSy solution will typically include two to twelve sensors installed at relevant locations on the vehicle. Once installed, the CoSSy sensor signals can cover many more use-cases, such as the detection of vandalism (scratching) or low-speed parking incidents, because these types of touch are each characterised by a particular sound signature. Other supported functions are, e.g., road condition observation, an identification of the driver via voice recognition, or detecting approaching emergency vehicles. Even communication with the vehicle via touch could be enabled by CoSSy: A tap at the door by an authenticated driver would suffice to activate an automated door opening.

“Structure-born and airborne sound are signals which provide valuable information about the immediate vehicle surrounding. CoSSy is specially developed to pick up the sound patterns of a number of types of contact. Structure-borne sound, for instance, warns when hitting an obstacle at the low speed level of automated parking,” said Laurent Fabre, Head of the Passive Safety & Sensorics business unit within Continental. “However, once CoSSy is on board, its detection principle can be used to add many more functions thus adding to the safety and comfort of a ride.”

Structure-born sound has been used for many years in passive safety system architectures: Crash Impact Sound Sensors, which detect the sound of a physical impact, increase the level of confidence during a crash. Harnessing its many years of (crash) sensor expertise, Continental has developed a new miniaturised sound sensor, which is tuned to low-speed contacts.

“Low-speed contacts are characterised by a different pattern of the structure-born sound signal,” said Andreas Forster, Manager Next Generation Technology at the Continental business unit Passive Safety & Sensorics.

In the future CoSSy could also provide an additional signal path to detect the road condition. The sound of water hitting the vehicle structure from below can be used to indicate the potential for hydroplaning. Depending on the future sensor design, airborne sound can be analyzed as well, which would help to detect approaching emergency vehicles - an important prerequisite for the type approval of automated vehicles. By utilising the Doppler effect, CoSSy can also detect the direction of the approach, which is highly relevant to the driver.

The first generation of the new CoSSy solution can utilise structure-born sound as an indicator of contact with an object during automated parking. “This could apply to a situation when a person approaches the car without entering the detection cones of other sensors such as ultrasonic or radar. Even though this would be a rare thing to happen, the remaining risk must not be ignored for reasons of safety, especially at the beginning of an autonomous parking maneuver,” as Forster explained.

As automated parking applications are expected to be widely available around 2022, the new sensor technology arrives just in time. The sensors deliver their signals to a central processing system which can be a dedicated electronic control unit (ECU) or it can be integrated into an existing ECU such as the airbag control unit.

Structure-born sound can be used as an information source for other applications as well. If a parked car gets dented or scratched, the CoSSy sensors can give the incident a time stamp. The sensor signal could also be used to wake up the appropriate camera to take a photo of the situation or to make the other driver aware of the contact by sounding an alarm or sending an information to a known smartphone. This would help to deter people from vandalism and to avoid unintentional hit-and-run situations. Rental car companies could easily check the car status as “undamaged” when the vehicles are returned.

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Continental to showcase new contact sensor that improves the safety of automated parking
Modified on Wednesday 11th December 2019
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