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Airbag sensors are generally called collision sensors. According to different uses, collision sensors are divided into trigger collision sensors and protective collision sensors. The trigger collision sensor is also called the collision intensity sensor, which is used to detect the acceleration change during the collision and transmit the collision signal to the airbag computer as the trigger signal of the airbag computer; the protective collision sensor is also called the safety collision sensor, and it is the same as the trigger collision sensor. Connected in series to prevent accidental explosion of airbags.
According to different structures, collision sensors can be divided into electromechanical collision sensors, electronic collision sensors, and mechanical collision sensors. The protective collision sensor generally adopts an electronic structure, and the trigger collision sensor generally adopts an electromechanical structure or a mechanical structure. The electromechanical collision sensor uses mechanical movement (rolling or rotation) to control the action of the electrical contact, and then the contact is opened and closed to control the connection and cut-off of the airbag circuit. The common ones are the rolling ball type and the eccentric hammer type. Collision sensor. Electronic collision sensors have no electrical contacts. Currently, there are two commonly used types: resistance strain type and piezoelectric effect type. A common mechanical crash sensor is a mercury switch type, which uses the conductive properties of mercury to control the on and off of the airbag circuit.
