AIR BAG SYSTEM BY SENSING A TIRE AIR PRESSURE

摘要

The invention is an air bag actuated by the condition of the air pressure in the tire. The system has an improved accuracy as it is controlled by the most optimal detection condition, and protects the passengers when the car overturns. The device comprises a wireless pressure sensing means(2) which detects the air pressure in each tire and sends a signal; a receiver circuit(3) which amplifies the air pressure checking signal from the wireless pressure sensing means(2); an ECU(5) for judging if it is an overturn signal and determining whether to activate the air bag(4); an inflater(6) for injecting the air into the air bag(4) with the signal from the ECU(5); pressure sensors(7) attached in each tire; radio transmitter(9) sending the signal through an antenna(8); a displayer displaying the checking signal; and a crush sensor(11) detecting a collision from behind.