关键词: 安全气囊；气体发生器；压力测试；不确定度

Abstract: The gas generator is the gas generating device of the automobile airbag and is its core component. The deployment time and inflation pressure of the airbag are directly related to the gas generator, and are the key technical indicators for evaluating the quality of the gas generator.In order to ensure the accuracy and consistency of the test data during the test of the pressure vessel of the automobile airbag gas generator, on the premise of assuming that there is no difference between the test samples, the general method is used to analyze and confirm the main factors affecting the whole test process. At the same time, the uncertainty of pressure test data corresponding to P50%、 P75%、P90% and Pmax time points in the test results is evaluated. The credibility of the test data is confirmed, the reliability of the test method of the pressure vessel of the gas generator is ensured, and the product performance and safety requirements are met.

Key words: Airbag; Gas generator; Pressure test; Uncertainty