ASIC spots passenger child seats to stop airbag deployment

Jan. 16, 2013
The ASIC, as part of an occupant detection system, prevents airbag injuries to infants by suppressing deployment of the passenger airbag if a child seat is present.

Resources:
AMS

Takata Corp.

An application-specific integrated circuit (ASIC) that combines analog and digital circuits distinguishes between an adult and a rear-facing infant seat on the passenger side of vehicles. AMS (formerly austriamicrosystems), Raleigh, N.ŽC., developed the ASIC as the primary controller for Tokyo-Based Takata Corp.’s CS3 (Child Seat Suppression System). CS3 prevents the passenger air bag from deploying if a child seat is present.

Current passenger air-bag shutoff devices use a weight switch to detect someone sitting in the seat. However, the weight of a child in a safety seat may be enough to trigger the sensor, letting the air bag deploy in a crash. The explosively inflating air bag can severely injure children in safety seats.

In contrast, CS3 uses an electric field that measures the capacitive coupling between the sensing electrode in the seat, the occupant, and vehicle ground. The mass and position of the seat occupant affects the magnitude of the signal detected, clearly distinguishing between children and adults.

The AMS’s ASIC works despite high electromagnetic disturbances such as the those generated when operating mobile phones in a car.

© 2013 Penton Media, Inc.

About the Author

Robert Repas

Robert serves as Associate Editor - 6 years of service. B.S. Electrical Engineering, Cleveland State University.

Work experience: 18 years teaching electronics, industrial controls, and instrumentation systems at the Nord Advanced Technologies Center, Lorain County Community College. 5 years designing control systems for industrial and agricultural equipment. Primary editor for electrical and motion control.

Sponsored Recommendations

June 27, 2025
Ensure workplace safety and compliance with our comprehensive Lockout/Tagout (LOTO) Safety Training course. Learn critical procedures to prevent serious injuries.
June 27, 2025
Join our expert webinar to discover essential safety control measures and best practices for engineering a truly safe and compliant industrial environment.
June 25, 2025
An innovative aircraft with electric drives combines the best of both worlds. The cross between drone and helicopter could mean significantly faster and more efficient air emergency...
June 25, 2025
Effective when other materials fail, ceramics are particularly suitable for applications requiring wear and chemical resistance, sliding characteristics or biocompatibility. Discover...

Voice your opinion!

To join the conversation, and become an exclusive member of Machine Design, create an account today!