Druckmeßumformer, insbesondere zur Sensierung einer Seitenkollision bei einem Kraftfahrzeug

摘要

A pressure transducer delivers an electrical useful signal (Un) which is determined by the relative change in pressure with respect to a pressure event. Low-frequency variations in the output signal (Ux) of a sensor arrangement (1) which are dependent on ambient pressure are compensated by a regulating device (2) with integrating behaviour. The sensitivity of the sensor arrangement (1) as a manipulated variable (Uy) varies in inverse proportion to the ambient pressure (po). High-frequency pressure changes in the output signal (Ux) of the sensor arrangement (1) are not compensated but, as relative pressure changes, determine by means of the variable sensitivity of the sensor arrangement (1) the useful signal (Un) which is additionally independent of temperature influences and offset errors of the pressure transducer.