Crash Impact Sensors: How Do They Work in Airbag Systems?

[kustomizer]

Hi,

Can anyone please tell me how does crash impact sensors work in an airbag system? Like, I want to know at what force does the sensors send the signals to the airbag control unit. And can these sensors be incorporated to the rear bumper as well? I am planning to incorporate this sensor for the activation of an actuator located in the headrest to prevent the whiplash effect. If anyone could guide me to some papers or explain me the sensor activation, it would have been helpful.

 

[Simon Bridge]

There are lots of different crash sensors and different manufacturers use whatever they feel like.
The simplest ones are just rods mounted under the radiator which break when the front end gets crumpled.
Most cars now use multiple accelerometers and a computer.

http://www.midsouthrescue.org/id7.html
http://www.caranddriver.com/features/the-physics-of-airbags-feature