傳感器的無線選項

　　對數(shù)據(jù)的渴望似乎是無窮無盡的。從你汽車燃油系統(tǒng)的氧氣水平到后院的降雨量，嵌入式系統(tǒng)和傳感器一直監(jiān)控著我們周圍的一切。

　　直到最近，所有監(jiān)控都是通過有線連接進行的。探頭和傳感器直接連接到電子或機電控制系統(tǒng)，監(jiān)控或記錄數(shù)據(jù)，或用它來控制一個過程。

　　只有最關(guān)鍵或最苛刻的任務(wù)是通過無線電進行嘗試的，因為空中連接的費用和復(fù)雜性意味著這種遙測只能為軍事、工業(yè)或空間應(yīng)用辯護。然而，無線技術(shù)已經(jīng)蓬勃發(fā)展到現(xiàn)在我們與許多無線傳感器交互的可能性。

　　Simple send only

　　While specific requirements will dictate a given application， there are basically three architectural choices when implementing a sensor-based design. These are interrupt， polled， and time-sliced. An interrupt based system will just transmit whenever a trigger event occurs， a polled system will only report when asked， and a time-sliced system will report in on a predetermined interval. A simple send only sensor architecture limits these choices to interrupt or time-sliced.