What sensors are in the airbag?
2 Answers
Airbags have trigger collision sensors and protective collision sensors. Here is an introduction to the sensors: 1. The trigger collision sensor, also known as the collision intensity sensor, is used to detect changes in acceleration during a collision and transmits the collision signal to the airbag control unit as a trigger signal. 2. The protective collision sensor, also known as the safety collision sensor, is connected in series with the trigger collision sensor and is used to prevent accidental deployment of the airbag. 3. Depending on their structure, collision sensors can also be classified into electromechanical collision sensors, electronic collision sensors, and mechanical collision sensors.
I usually study automotive electronic systems, and airbag sensors are quite crucial. There are mainly acceleration sensors installed at the front of the vehicle frame, which can detect the impact force of sudden deceleration. There are also pressure sensors hidden in the seats that can sense the weight when a passenger sits down, preventing false deployment for empty seats. Collision sensors are distributed around the vehicle body, such as in the B-pillars and door areas, to detect side or frontal impacts. These sensors are all connected to the central control unit, which analyzes the data to decide whether to deploy the airbags. Modern vehicles also include occupant classification sensors that adjust airbag deployment force based on height and weight for better protection. Regular inspection of these sensors is essential—otherwise, if they malfunction, the airbags may fail to deploy or deploy incorrectly during an accident, which can be quite dangerous. Remember to have a professional shop test these components during maintenance to ensure the safety system's reliability.
