簡化電容式觸摸傳感器的設計使用賽普拉斯cy8ckit

　　觸摸控制是許多消費產(chǎn)品從家電到服飾的基本要求。然而，對于開發(fā)人員來說，觸摸傳感器的設計往往似乎是一個藝術的工程，由于功能設計和物理布局之間的相互依存關系。因此，開發(fā)團隊可以發(fā)現(xiàn)自己延遲，因為他們通過多個設計相互作用，以達到最佳性能的按鈕，滑塊，和其他元素。

　　為了幫助開發(fā)項目，Cypress半導體的PSoC CapSense 4000s原型套件提供了完整的硬件和軟件需要評估電容式觸摸傳感和范圍廣泛的產(chǎn)品，它的執(zhí)行速度。

　　本文將介紹如何各種電容式觸摸傳感方法的工作，以及一些設計時需要注意的設計師與他們。然后介紹了PSoC CapSense工具，它是如何工作的，以及如何用它來設計。代碼示例提供。

　　Why capacitive touch？

　　The nature of capacitive touch sensors makes them well suited to a wide range of applications. By eliminating the moving parts in conventional mechanical buttons and switches， touch sensor systems are highly reliable and unlikely to fail due to wear and tear. Further， because they can be completely encapsulated in protective materials， they are able to operate in harsh environments. Beyond their reliability， touch sensors can conform easily to different shapes， helping engineers respond to consumer demand for sleek， elegant designs in home appliances， automobiles， and other mainstream products.

　　Capacitive touch sensors take advantage of the change in capacitance that occurs when a finger or hand approaches a specially constructed touch surface. Touch sensors detect this change using two different approaches： self-capacitance or mutual capacitance.