旋轉機械內部的無線連接

　　無線傳感器存在的一個關鍵需求是，可以放置在工業機械、飛機噴氣發動機和風力渦輪發電機等旋轉部件上，以便對關鍵部件進行健康監測。無線傳感器因其相對較低的成本和功率要求，在旋轉機械狀態監測中得到越來越廣泛的應用。使用他們的無線連接，可以將數據發送到一個工廠管理網絡或推到云，它可以被用來遠程監控關鍵旋轉部件從世界上任何地方，給工程師設備故障預警和允許他們優化檢修計劃，減少停機時間。

　　其他潛在的應用包括能夠實時平衡負載的洗衣機、監測熱量和控制潤滑油噴射的鉆頭、監測起落架軸承摩擦的傳感器等等。

　　However， placing wireless sensors on the actual rotating parts is a nontrivial task. While power and signal can pass through a simple series of brushes and commutators， this is not a good approach when a more precise solution exists， even if it is more complicated. What is more， in manufacturing applications the magnetic field present in the machine can block signals transmitted between the wireless sensors.

　　This article looks at wireless techniques that allow low-power sensors and data acquisition systems inside rotating machines to communicate wirelessly. All parts， datasheets， reference designs， and development kits referenced here can be found online at Digi-Key’s website.