Minimum threshold for car accident

Question

I am using accelerometer to detect the car accident. I am having a problem with minimum threshold value is required to detect the car accident. What minimum threshold required t

Answer 1

Acceleration required to deploy airbags

Around 20 - 30 G's. Of course it depends on your definition of "accident".

Source:

http://answers.google.com/answers/threadview/id/523539.html

Answer 2

Based on Googling around, I'd estimate a peak acceleration magnitude of >40G would indicate a car crash. See this this paper for a basic study of data during car crashes.

Alternatively, you could crash a few cars yourself and get some test data. :)