CRASH SENSOR HAVING AN ELASTICALLY DEFORMABLE TUBE AND AT LEAST ONE PRESSURE SENSOR

摘要

The invention relates to a crash sensor, in particular for motor vehicles, consisting of an elastically deformable tube having a cavity and at least one pressure sensor for detecting the pressure change in the cavity in the tube, wherein the tube has an inside diameter of between 2.5 and 6 millimeters and an outside diameter of less than 12 millimeters. The dimensions of said tube are surprisingly small in relation to the size of the bumper, in particular while also considering that the tube is preferably arranged behind an absorbing element. However, such a small, thin tube proves to be especially suitable for providing a significant pressure signal for differentiating a pedestrian impact from an impact against a rigid obstacle, for example a lamppost or tree, in the specified speed range.