Impact parameter measurement system of car door components
                                                        ZOU Qin wen, WANG Ying, GUO Liang, LI Hong jun
                       （Faculty of Machanical Engineering & Automation, Zhejiang Sci Tech University, Hangzhou 310018, China）

Abstract: Aiming at the problem that the multi channel transient signal is difficult to be measured and compared accurately at the same time in the impact performance test, the impact rigidity measurement station was used as the test platform, and the automobile door parts were used as the test objects. The pressure, displacement and acceleration sensor were selected. The virtual instrument platform and the high speed data acquisition card synchronously collect the multi impact impact signal. The virtual instrument software was developed to collect the shock signal, and the measurement signal was subjected to anti interference filtering. The data search algorithm was designed to obtain the impact sign. The signal time domain truncated positioning shock point was carried on. The theoretical impact displacement was calculated. The impact displacement, the impact force and the acceleration of the multi channel transient signal fast capture was achieved. The location of the impact point and the peak point was achieved. The comparison between actual displacement of the impact and theoretical displacement was achieved. The results indicate that the method can accurately measure the impact time, determine the corresponding impact force, displacement and acceleration parameters, and realize the comparison and screening of the impact performance of the door parts.

Key words: transient signal; virtual instrument; impact signal; door parts