Micro-accelerometer and car air-bag

Micro-accelerometer and car air-bag

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Credit: PETER MENZEL/SCIENCE PHOTO LIBRARY

Caption: Image showing the small size of the micro- accelerometer used to trip a car 'air-bag' safety device. The micro-accelerometer is seen as the small black dot in the middle of the hand. In a collision, the micro-accelerometer detects the sudden slowing down of the car. This triggers a circuit which rapidly inflates a plastic bag with air. The air-bag deploys between the driver and the steering wheel, preventing serious facial injury as the driver is thrown forward. The air- bag inflates fully in about 0.2 seconds. Micro- accelerometers are mechanical devices made by the same processes that are used in the manufacture of conventional silicon microcircuits.

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Keywords: accelerometer, air bag, air-bag, car, car safety, crash safety, micro-, passenger safety, safety systems, transport industry

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