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3500/64M“液體擺”式慣性器件

液體擺的結構原理是在玻璃殼體內裝有導電液，并有三根鉑電極和外部相連接，三根電極相互平行且間距相等，如圖2所示。當殼體水平時，電極插入導電液的深度相同。如果在兩根電極之間加上幅值相等的交流電壓時，電極之間會形成離子電流，兩根電極之間的液體相當于兩個電阻RI和RIII。若液體擺水平時，則RI＝RIII。當玻璃殼體傾斜時，電極間的導電液不相等，三根電極浸入液體的深度也發生變化，但中間電極浸入深度基本保持不變。如圖3所示，左邊電極浸入深度小，則導電液減少，導電的離子數減少，電阻RI增大，相對極則導電液增加，導電的離子數增加，而使電阻RIII 減少，即RI＞RIII。反之，若傾斜方向相反，則RI＜RIII。

在液體擺的應用中也有根據液體位置變化引起應變片的變化，從而引起輸出電信號變化而感知傾角的變化。在實用中除此類型外，還有在電解質溶液中留下一氣泡，當裝置傾斜時氣泡會運動使電容發生變化而感應出傾角的“液體擺”。

3500/64M

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