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

March 31, 2025
Unlike passive products - made of simple carbon springs - the bionic prostheses developed by Revival Bionics are propulsive, equipped with a motor and an artificial Achilles tendon...
March 31, 2025
Electric drives are a key technology for the performance of machines, robots, and power tools. Download this guide for an introduction to high-quality mechatronic drive systems...
March 31, 2025
Discover the world of maxon drive technology: motors, gearheads, sensors, controllers, and accessories. Configure your drive system online, including all relevant product and ...
March 31, 2025
Share current page XSun designs and manufactures a drone that is both energy-independent and can make its own decisions, for fully-automated missions. The company needed reliable...

Voice your opinion!

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