Tactile Occupant Detection Sensor for Automotive Airbag

Automotive airbags protect occupants from crash forces during severe vehicle collisions. They absorb energy and restrain the occupants by providing a soft cushion effect known as the restraint effect. Modern airbags offer partial restraint effect control by controlling the bag’s vent holes and provi...

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Bibliographic Details
Published in:Energies (Basel) 2021-09, Vol.14 (17), p.5288
Main Authors: Shirur, Naveen, Birkner, Christian, Henze, Roman, Deserno, Thomas M.
Format: Article
Language:English
Subjects:
Air bags
automotive airbag
Cameras
capacitive tactile sensor
Control systems
Cushions
Electrodes
Energy absorption
Injuries
occupant detection
Optimization techniques
passive safety
Position sensing
Sensors
Tactile sensors (robotics)
vehicle crash
Vision systems
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Summary:Automotive airbags protect occupants from crash forces during severe vehicle collisions. They absorb energy and restrain the occupants by providing a soft cushion effect known as the restraint effect. Modern airbags offer partial restraint effect control by controlling the bag’s vent holes and providing multi-stage deployment. Full restraint effect control is still a challenge because the closed-loop restraint control system needs airbag–occupant contact and interaction feedback. In this work, we have developed novel single and matrix capacitive tactile sensors to measure the occupant’s contact data. They can be integrated with the airbag surface and folded to follow the dynamic airbag shape during the deployment. The sensors are tested under a low-velocity pendulum impact and benchmarked with high-speed test videos. The results reveal that the single sensor can successfully measure occupant–airbag contact time and estimate the area, while the contact position is additionally identified from the matrix sensor.
ISSN:1996-1073
1996-1073
DOI:10.3390/en14175288