Study on the Influence of Accelerometer with Damping and Without Damping on the Results of Head Impact Test at Front Windsheld

The influence of the acceleration sensor with or without damping on the results of head impact test of pedestrian protection at the front windshield is studied by means of experiment and theoretical analysis methods in this paper. The results demonstrate that, with the front windshield cracked due to the head impact, the acceleration peaks of the undamped sensor (Endevco 7264C) turn to be false and the HIC₁₅ value deviates from the real ones when the sensor is stimulated by some excitation with high frequency. While the damped sensor (Endevco 7264H) can prevent the interference caused by resonance of the front windshield and the sensor, and improve the accuracy of the test results. It’s suggested that a damped acceleration sensor should be used in the head impact test at the front windshield.