According to the function points

1) : collision intensity sensor for auto level of collision detection. The sensor according to the installation position can be divided into: left front crash sensor, right front crash sensor and central collision sensors.

2) : collision protection sensor used for prevent airbags expanding open by mistake. Also known as the safe collision sensors or detect collision sensors.

Fold the points of the structure

Collision combination sensor has a mechanical and electrical, electronic and mercury switch type.

The working principle of three types of collision sensors:

1) electromechanical combination: use mechanical movement to make electrical contact to disconnect circuit to control the airbag. It has a ball type, roller type structure and eccentricity hammer.

2) electronic: using the collision resistance strain deformation or the resistance value changes of piezoelectric crystal stress changes make the output voltage to control the airbag circuit.

3) mercury switch type: using mercury conductive properties of airbag control circuit.