R50, R52, R53 - Seat-Occupancy Detector, Passenger
Installation location
The seat occupancy detector is located in the seat cushion of the passenger seat.
Construction
The seat occupancy mat is integrated into the seat cushion of the passenger seat. The seat occupancy mat consists of conductors and pressure sensors. The conductors are connected to the electronic evaluation unit.
How it works
The seat-occupancy mat used for the seat-occupancy detector is able to distinguish between a child seated in a rearward-facing child seat (as defined by law) from a light, grown-up person.
The pressure sensors in the conductors can be individually read. An increased mechanical load on a sensor reduces the electrical resistance.
The measurement current changes.
An evaluation of the individual sensors generates an image of the area occupied and local centers of gravity. The distances between the areas and centers of gravity indicate whether the seat is occupied by a person or a child seat.
The electronic evaluation unit sends a message to the MRS control unit (via the K-bus).