人機界面設計中的觸摸傳感技術

　　隨著工業環境中更多的計算能力，人機界面有更多的選擇。觸摸傳感器和觸摸屏的多傳感器技術正變得越來越流行，而其他技術，如電容式觸控輪和接近傳感器是看到更多的采用。

　　越來越多的工業設備需要一個更復雜的界面、按鈕和開關的滑動條控制更換車輪，和觸摸屏。提供一個堅固的界面，可以很容易地集成到更先進的控制系統，并仍然很快地在車間使用，是一個廣泛的設備至關重要。

　　有廣泛的選擇不同的觸摸屏控制器，而在工業應用中，功耗并不一定像便攜式消費設備一樣重要。然而，保持低功耗降低了溫度，提高了可靠性，并有可能降低運行成本。也有廣泛的便攜式設備使用在工廠的地板上，特別是在測試中，功耗是至關重要的。同樣，一個設備的電磁性能可能不是消費設備的問題，但在嘈雜的工業環境中是至關重要的。降低EMI易感性和減少界面排放的技術都是關鍵的設計因素。

　　Capacitive controllers have become much more popular with the advent of the Apple iPod control wheel， some of which is based around technology from Cypress Semiconductor. The capacitive technology helps in the industrial environment as the sensor can be covered. This technology functions by detecting changes in the electric field caused by the presence of another field such as a finger. However， these sensors can struggle with gloved fingers， so resistive contacts can be helpful in these situations. This distinction is continued with touchscreens. Capacitive screens are common up to 10 inches， but resistive screens can handle larger screen sizes and even gloves.

　　Proximity capacitive touch sensors in simple linear or rotational sliders offer significant advantages for industrial interfaces. With no moving parts to wear out and easily sealed to offer protection from harsh environments， they are more reliable， more energy efficient， and are more easily integrated to create an intelligent system.