由於電容式感測器在電極片感測面積內無法分辨物體位置，此一限制使感測器只能夠分辨物體的有無，而近年來的研究已經可以分辨 不同物體的影響，例：不同的厚度、不同的介電質，而本研究提出一具一維分辨力之防護電容式近物感測器的架構和實驗結果，在這個感測器中，我們的感測電路，增添了差動模式和整合模式，而在感測探頭中，包含了二個感測平面，此二個感測平面可使用差動模式來了解物體的水平位置，而二個感測平面可成為一個感測探頭，此一感測探頭可利用整合模式來感測物體整體影響感測器的強弱，此二種模式的結合可以讓我們的感測器具有一維分辨力，再配合上電容反射器(Capaciflector)以減少旁路電容的影響，以提升靈敏度。這個感測器的優點是不同於以往必需要依賴陣列式的排列才可以知道物體的位置，而只要物體在感測平面上就可以分辨一維水平位置，在未來的展望上可以利用此種感測器應用於動物行為研究或是人體偵測以達到更精確的偵測。 Capacitive proximity sensor offers the advantage that allows the relatively large sensing area with the same size of the single sensor. So it is difficult to detect position of the object with single sensor. The capacitive proximity sensor usually detects the character of the object like different thickness and different dielectric. It is also can detect proximity of the object. In this paper, we proposed and demonstrated a guarded capacitive proximity sensor with one-dimensional differentiation which includes a differential mode and a summation mode. The sensing probe uses two sensor planes to facilitate the differential mode to indicate relative location of the object on the sensor plane. The two sensor planes can be used as a sensing element to facilitate the summation mode to sense the property or the distance of the object. The two modes combined enable the one-dimensional differentiation. This sensor improves its sensing ability by incorporating a capaciflector to restrain stray capacity. The sensor can be used to detect either the one-dimensional position or the thickness of a target object.
