An airbag is a type of vehicle safety device and is an occupant restraint system. Around for many years like seat belts, the concept of the airbag which is considered, as a soft pillow to land against a crash .
Crash sensors which are the small pieces of electronics are designed to tell when the vehicle has been damaged in an accident. They respond to several different sets of stimuli. Different types of sensors measure different stimulus and are monitored by the airbag control unit located in the front portion of the cabin. The sensors, relay signals to the airbag control unit, which analyzes the data and can orchestrate safety features like seat belt lock, automatic door locks, as well as airbag deployment.
The success of the airbag system relies upon the crash sensors working which must be extremely quick to respond, so the most expensive and technologically advanced part of the airbag system are here.
However, some industries such as Denso Corporation, Freescale Semiconductor, Key Safetly Systems, Mitsubishi Electri Co. Ltd, Robert Bosch Corporation, Takata Corporation, Toyoda Gosei and TRW Automotive are among the best manufacturer of air bags.