Detection of a motor vehicle impact by use of a contact sensor, in the form or a fluid filled tube, along the front bumper bar with attached pressure sensors, with the rate of pressure change used to indicate an impact

摘要

Contact sensor for detecting the contract of an object with another object, especially for detecting the contact of a motor vehicle bumper bar with another object. The sensor comprises a tubular body (1) filled with fluid, with the pressure in the body detected by a sensor (2, 3). An Independent claim is made for a method for evaluating the signal from an inventive contact sensor in which the rate of increase of the pressure measured by the pressure sensors taken as an indication of a vehicle impact.