[quote=jimmy562004 (臥雲眠月)]設在前保桿位置的感測器大多是左右各1/3處. 所以在正中央以及過於側邊受到撞擊. 車廠說有可能不會爆. 這是聽過. 可是那位姊的面魯就是撞在1/3處. 也就是感測器的正前方. 這樣也不會爆 ! 那到底怎樣才會爆? [/quote] [quote=jimmy562004 (臥雲眠月)] 嗯嗯 ! 所以說車廠有設定一個引爆最低時速. 因為他們覺得在那個時速不爆氣囊是可以的. 我所認知好像是40公里. 剛剛上網查有說35的.也有45的...... [/quote] 臥雲大，請恕小弟斗膽直言：您有點「爬文不精」喔！ 您的問題，我們先前都早已說過了： [quote=lyj2605 (Diver)][quote=qqq2011 (QQQ2011)] [url="http://en.wikipedia.org/wiki/Airbag"]http://en.wikipedia.org/wiki/Airbag[/url] 「Unlike crash tests into barriers, real-world crashes typically occur at angles other than directly into the front of the vehicle, and the crash forces usually are not evenly distributed across the front of the vehicle. Consequently, the relative speed between a striking and struck vehicle required to deploy the airbag in a real-world crash can be much higher than an equivalent barrier crash. [b][color="#FF0000"]Because airbag sensors measure deceleration, vehicle speed is not a good indicator of whether an airbag should have deployed. [/color] [/b] Airbags can deploy due to the vehicle's undercarriage striking a low object protruding above the roadway due to the resulting deceleration.」 [b][color="#FF0000"]由上文可知：正面的「前氣囊」的主要啟動條件之一， 是判斷 deceleration (減速度，i.e.負值的加速度) 是否達到預設值，而不是看當時的車速如何。[/color] [/b] 另外，除了大家常常提及的「撞擊角度」之外， 「撞擊物的形狀 & 軟硬度」也是「氣囊是否引爆」的影響因素之一。 舉例而言： 假設某車以時速 40 公里正面撞上了一片厚實又堅硬的水泥牆，此時「前氣囊」應該要爆開； 但若它是以時速 40 公里正面撞上了一棵樹，此時「前氣囊」卻不一定要爆開； why？ 因為後者的 deceleration 比前者小！ [/quote] Q大引申的維基連結還有以下資訊： Triggering conditions Some cars provide the option to turn off airbags. Airbags are designed to deploy in frontal and near-frontal collisions more severe than a threshold defined by the regulations governing vehicle construction in whatever particular market the vehicle is intended for: U.S. regulations require deployment in crashes at least equivalent in deceleration to a 23 km/h (14 mph) barrier collision, or similarly, striking a parked car of similar size across the full front of each vehicle at about twice the speed. International regulations are performance based, rather than technology-based, so airbag deployment threshold is a function of overall vehicle design. 裡面有說到幾個重點： 1. 美國法規是有明文規定在撞擊堅固的物體時，安全氣囊要在時速23公里撞擊時作動。在雙倍速度下（時速46公里）以正面撞擊相同重量的停止車輛時安全氣囊也要作動。 2. [b][color="#FF0000"]其他國家並沒有硬性規定那種撞擊速度下安全氣囊必須作動，而是評價整車的碰撞實驗結果[/color][/b]。[/quote]

[quote=jimmy562004 (臥雲眠月)] 設在前保桿位置的感測器大多是左右各1/3處. 所以在正中央以及過於側邊受到撞擊. 車廠說有可能不會爆. 這是聽過. 可是那位姊的面魯就是撞在1/3處. 也就是感測器的正前方. 這樣也不會爆 ! 那到底怎樣才會爆? [/quote] 大大，您對「感知器」的觀念，似乎仍只停留在過去的「碰撞感知器」(impact sensors) 而已 .... 就目前的氣囊技術而言，「碰撞感知器」(impact sensors) 通常只是輔助地提供參數給 ACU (氣囊的 ECU)； 至於用來決定是否引爆氣囊的關鍵因素，則是「加速度感知器」(accelerometer) 所提供的 deceleration 值。 詳情可參考「 [url="http://en.wikipedia.org/wiki/Airbag"]http://en.wikipedia.org/wiki/Airbag[/url] 」，引文如下： 「The airbag sensor is a MEMS accelerometer, which is a small integrated circuit with integrated micro mechanical elements. The microscopic mechanical element moves in response to rapid deceleration, and this motion causes a change in capacitance, which is detected by the electronics on the chip that then sends a signal to fire the airbag.」 [quote=jimmy562004 (臥雲眠月)] 嗯嗯 ! 所以說車廠有設定一個引爆最低時速. 因為他們覺得在那個時速不爆氣囊是可以的. 我所認知好像是40公里. 剛剛上網查有說35的.也有45的...... [/quote] 臥雲大，請恕小弟斗膽直言：您有點「爬文不精」喔！ 您的問題，我們先前都早已說過了： [quote=lyj2605 (Diver)][quote=qqq2011 (QQQ2011)] [url="http://en.wikipedia.org/wiki/Airbag"]http://en.wikipedia.org/wiki/Airbag[/url] 「Unlike crash tests into barriers, real-world crashes typically occur at angles other than directly into the front of the vehicle, and the crash forces usually are not evenly distributed across the front of the vehicle. Consequently, the relative speed between a striking and struck vehicle required to deploy the airbag in a real-world crash can be much higher than an equivalent barrier crash. [b][color="#FF0000"]Because airbag sensors measure deceleration, vehicle speed is not a good indicator of whether an airbag should have deployed. [/color] [/b] Airbags can deploy due to the vehicle's undercarriage striking a low object protruding above the roadway due to the resulting deceleration.」 [b][color="#FF0000"]由上文可知：正面的「前氣囊」的主要啟動條件之一， 是判斷 deceleration (減速度，i.e.負值的加速度) 是否達到預設值，而不是看當時的車速如何。[/color] [/b] 另外，除了大家常常提及的「撞擊角度」之外， 「撞擊物的形狀 & 軟硬度」也是「氣囊是否引爆」的影響因素之一。 舉例而言： 假設某車以時速 40 公里正面撞上了一片厚實又堅硬的水泥牆，此時「前氣囊」應該要爆開； 但若它是以時速 40 公里正面撞上了一棵樹，此時「前氣囊」卻不一定要爆開； why？ 因為後者的 deceleration 比前者小！ [/quote] Q大引申的維基連結還有以下資訊： Triggering conditions Some cars provide the option to turn off airbags. Airbags are designed to deploy in frontal and near-frontal collisions more severe than a threshold defined by the regulations governing vehicle construction in whatever particular market the vehicle is intended for: U.S. regulations require deployment in crashes at least equivalent in deceleration to a 23 km/h (14 mph) barrier collision, or similarly, striking a parked car of similar size across the full front of each vehicle at about twice the speed. International regulations are performance based, rather than technology-based, so airbag deployment threshold is a function of overall vehicle design. 裡面有說到幾個重點： 1. 美國法規是有明文規定在撞擊堅固的物體時，安全氣囊要在時速23公里撞擊時作動。在雙倍速度下（時速46公里）以正面撞擊相同重量的停止車輛時安全氣囊也要作動。 2. [b][color="#FF0000"]其他國家並沒有硬性規定那種撞擊速度下安全氣囊必須作動，而是評價整車的碰撞實驗結果[/color][/b]。[/quote]