Do airbags belong to active safety or passive safety?

[MacNova]

Airbags belong to passive safety, with specific details as follows: 1. Passive safety: Airbags only function when an accident occurs and cannot alter the nature of the accident itself. For example, automatic collision prevention in cars is considered active safety because it works before an accident happens and can even prevent accidents. 2. Impact sensors: When an impact sensor detects a collision, the relevant control system evaluates the severity of the crash to determine whether to trigger the inflation device. The inflation module typically consists of a gas generator, such as gasoline or explosives, combined with an ignition device. While the car is in motion, the sensor system continuously sends speed change information to the control unit, which analyzes this data. If the measured acceleration, speed change, or other indicators exceed predetermined thresholds (indicating a genuine collision), the control unit sends an ignition command to the gas generator or the sensor directly controls the ignition. Upon ignition, an explosive reaction occurs, producing nitrogen (N2) or releasing compressed nitrogen from a storage tank to inflate the airbag.