电容式触摸按键防雨水控制算法研究与应用

Research and application of rainproof control algorithm for capacitive touch buttons

电容式触摸按键简洁、美观,作为一种接口技术在各类电子产品中得到了广泛的应用,并受到当今客户的青睐。传统的电容式触摸按键一般应用于室内,不考虑雨水等外界环境的干扰。文中针对汽车车门把手电容式触摸按键使用环境的特殊性,设计了适用于室外应用场景的电容式触摸按键,其主要基于CVD原理采用TPD(Time Per Deviation)算法和FTP(Fixed Time Peak)算法区分人手和雨水,只对人手进行响应,排除雨水的干扰。

Capacitive touch buttons are simple and beautiful.As an interface technology,they are widely used in various electronic products and are favored by today’s customers.Traditional capacitive touch buttons are generally used indoors,regardless of the interference from the external environment such as rain.According to the particularity of the use environment of the car door handle capacitive touch buttons,this paper designs capacitive touch buttons suitable for outdoor application scenarios,which are mainly based on the CVD principle and use TPD(Time Per Deviation)algorithm and FTP(Fixed Time Peak)algorithm to distinguish hand and rain,only respond to the hand,eliminating the interference of rain.