【摘要】 为了设计实用新型工业人机界面,提出了一种基于五点触摸校正和中位数均值滤波的Android多点触摸输入系统设计方法。采用五点触摸校正,根据触摸屏上采样的五个点,计算出校正系数,作为触屏校正参数;在mXT224控制器处理基础上,采用中位数均值阀限滤波,滤除触摸系统高斯噪声与尖峰噪声,并结合触摸校正参数校正输入坐标,逐级上传输入坐标信息,最终传递给上层应用程序。测试表明,基于优化的Android多点触摸输入系统在噪声很大环境下能够维持高信噪比(超过80:1),并支持带手套或触笔触摸输入,反应时间小于10ms,符合工业人机界面(HMI)设计要求。更多还原

【Abstract】 In order to design a new practical industrial human-machine interface,a touch input system design way based on a five-point touch calibration and a median average filter algorithm is proposed.The system uses a five-point touch calibration to calculate the correction factor based on a sampling of five points of the touch screen as a touch-screen calibration parameters;based on mXT224 controller,it utilizes the average median threshold way to filter white Gaussian noise and spike noise,and then effectively corrects calculation of multi-point input,step by step uploads input coordinate information,and ultimately passes information to the upper application.The tests show that the noisy environment based on the optimization of the Android multi-touch input system can maintain a high signal to noise ratio(over 80:1),and support with gloves or a stylus to touch input with the response time of less than 10 ms,which is accorded with the industrial Human-Machine Interface(HMI)design requirements.更多还原