6DR1900-5
6DR1900-5
6DR1900-5
《聯系人；歐先生》
《座機：0592-5709825》
《傳真：0592-5917519》
《24小時熱線：18030229053微信同步》
《QQ ：2479261344》
《QQ郵箱：2479261344@qq.com》
針對一些高要求的應用程序，傳感器的運行模式可以迅速更換，只在真正有需要時,才會提高分辨率和數據傳輸速率。有些傳感器甚至能夠自動轉換模式�？蛻艨勺孕信渲没顒訝顟B下所需要的分辨率和數據傳輸速率，并自定義啟動它的條件。這時傳感器會進入靜止狀態，但仍會繼續測量數據，并以極低的數據傳輸速率和分辨率進行，等出現設定條件(動作事件)才切換回到啟動狀態。
另一個不錯的設計原則是利用低供電水平，因為較低的供電水平也意味著更低的電流消耗。這就是為什么對于低功率的應用，1.8V電源是首選。
在某些設計中，可以使用傳感器的功率循環。傳感器的電源只有在需要測量時才會被激活，否則傳感器就會處于關閉狀態。我們可以通過從微控制器的引腳上提供傳感器的電源來實現。如圖2所示。在應用這種技術時，需要正確的計算功耗預算，因為每個傳感器的啟動都需要對其進行配置和等待，直到輸出被確定，并提供正確的數據。
圖2：透過為控制微控制器針腳控制傳感器電源供應
大多數MEMS加速計都是數字傳感器，這代表它們可以將測量的模擬信號轉換成數字數據。因為有集成的模擬信號轉換器，加上對信號失真的敏感度較低，物料清單項目得以減少，但這并不是唯一的優點。嵌入的中斷生成器MEMS加速計可以在滿足用戶設定的參數條件發生時，產生觸發信號，這就是用動作感應喚醒功能的方式。微控制器(MCU)配置傳感器來產生一個喚醒觸發器，并進入功耗極低的睡眠模式。當一個動作被檢測到是，傳感器會產生一個中斷信號，MCU接到信號后會切換到一個合適的操作模式，然后處理剛剛發生的情況。
數字傳感器也可以接管有微控制器執行的運動處理有關的任務。MCU當然可以執行相同的工作，但是功率效率要低得多——MCU的耗電是一毫安計算，傳感器則是微安。檢測自由落體、單點、雙擊(用戶動作類似鼠標點擊)、人像/景觀方向檢測等，是通過傳感器內部邏輯實現的。MCU不需要進行任何計算，只需要等待一個中斷觸發，并且只在它發生時對動作作出反應。
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