Car accident sensor has piezo or electromagnetic test pressure generator with sensor to compare with stored data

摘要

A car accident sensor (2) in a flexible housing (3) in the bumper (1) has a long elastic hollow pipe (4, 5, 6) with elastic zone (7) and pressure sensor (10) to measure the pressure increase due to a pressure wave from the piezo electric or electromagnetic test pressure generator (13) and compare it with stored data to check correct operation of the sensor.