HISTORY ABOUT RESTRAINT SYSTEM

1. Automobiles entered the market more than 100 years ago. Since then, tremendous progress in reliability,usability, and safety of roadway vehicles has been made. 
2. Over the last 20 years, the automotive safety industry has gone through considerable changes.In recent years, passive restraint systems have been one of the fastest-growing sectors within the automotive industry.
3. One reason for this growth is the inclusion of additional restraint devices on vehicles.For example, the average number of air-bag modules has increased from one to two per vehicle in the early 1990s to four to six per vehicle for the latest models, with more expected to come.
4. Another reason for this growth is an increase in the complexity and sophistication of the safety systems' functional requirements.For example, to minimize out-of-position occupant injuries, a smart air-bag system needs to be equipped with occupant-sensing capabilities.
5. Particularly notable in the evolution of restraint systems has been the phenomenon of increasing use of electronics, which has occurred in parallel in the automotive world, as well as most technology fields.Upcoming products implemented in electronics, such as rollover and other sensors, are being added into an integrated vehicular safety system.