| 摘要 |
A starting device of a passenger protection apparatus has a hollow body defining a cavity in which a fluid exists, a current speed measuring means and a determination means. The current speed measuring means is disposed to allow the cavity of the hollow body to communicate with a space outside of the hollow body. The current speed measuring means measures a current speed of the fluid passing therethrough when a differential pressure occurs between the cavity of the hollow body and the space outside of the hollow body at least due to a collision. The determination means determines the collision based on the current speed measured by the current speed measuring means.
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