简化电容式触摸传感器的设计使用赛普拉斯cy8ckit

　　简化电容式触摸传感器的设计使用赛普拉斯cy8ckit

　　触摸控制是许多消费产品从家电到服饰的基本要求。然而，对于开发人员来说，触摸传感器的设计往往似乎是一个艺术的工程，由于功能设计和物理布局之间的相互依存关系。因此，开发团队可以发现自己延迟，因为他们通过多个设计相互作用，以达到最佳性能的按钮，滑块，和其他元素。

　　为了帮助开发项目，Cypress半导体的PSoC CapSense 4000s原型套件提供了完整的硬件和软件需要评估电容式触摸传感和范围广泛的产品，它的执行速度。

　　本文将介绍如何各种电容式触摸传感方法的工作，以及一些设计时需要注意的设计师与他们。然后介绍了PSoC CapSense工具，它是如何工作的，以及如何用它来设计。代码示例提供。

　　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.