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Airbag works
A typical air bag system consists of two components: collision detection ignition device (or sensor), air bag gas generator (or air bag). When the sensor activated switch, the control circuit is in working condition began and by the detection circuit to determine whether he has the collision occurred. If the signals from two sensors simultaneously, then the role will be to start the airbag. Generator and battery as the car in front is usually easy to damage the site, therefore, airbag control system are equipped with their own power to ensure that the role play. In determining the conditions of cast right after the airbag, the control circuit current will be sent to ignition, by rapid transient heating, the propellant containing sodium nitride light. In the near-explosive chemical reaction occurs rapidly at the same time, will produce much sound to nitrogen-based gas, the balloon inflated to the full state, and by a strong impact, air bags can be washed on the steering wheel cover and open fully expanded to protect the drivers head from harm. At the same time in the process of burning propellant, ignition assy in cooled metal mesh cover can be rapid expansion of the gas, then a small balloon may be well designed exhaust vents to play gradually buffering function and to avoid the body continues hinder the move of sight after the collision.
Need of special note is the only sensor to meet certain conditions it will work. Airbag sensor there are many, in part, or leveraged by pendulum switch, there is the spring loaded wheel-style, in addition to products with mercury switches. But whatever type of sensor switch, must have sufficient impact force to make switch start, while the impact force must come from the positive direction Caixing. Usually the impact force is about equal to the speed of 25-50 km around the results generated by the collision fixtures. When the car by this high-speed collision, installed in the vehicle front collision sensors and the central fitted in the car safety sensors can detect the sudden deceleration speed, and this signal is passed to the airbag system, the rapid control of the computer, the computer through the analysis confirmed only after we set off airbags electric hot bag of firearms, so that a rapid expansion of air bags.
It has been calculated to be formal airbags a car crash in 0.01 seconds after the start of work within the microprocessor, 0.03 seconds, ignition start, 0.05 seconds, high pressure gas into air bags, 0.08 seconds out balloon inflated balloon within 0.11 seconds completely swollen, at the moment, the drivers will hit the air bag.
Visible, open or not with the impact airbag angle and impact velocity have the general turn in the car, minor collisions, side impact or rear collision, the airbags will not open, such as upgraded version of the Santana 2000 car around the front less than 30 degrees are only open when the airbag hit. Another point, in terms of impact velocity Duiyu, airbag system in the determination of the reduction of striking speed of the vehicle is, therefore, in security, collision experiment, generally are not so Che straight Di Yi Dong and can not hit the Qiangshang Bianxing
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