电阻触摸屏误差分析及加速度模型的数据处理

Error analysis of resistance touch screen and the data processing based on acceleration model

电阻式触摸屏在电子行业中广泛应用,但由于误差的多样性,特别在精确识别方面的应用有较大的困难。介绍了电阻式触摸屏的系统误差和随机误差产生的原因,并提出了一种基于加速度模型的新算法识别笔事件并消除笔事件中随机误差影响。算法包括落笔、笔移动及抬笔的判断,"飞点"、"抖动"及"拖尾"现象的消除,断点的数据插补,详细软件数据处理的流程图等。从最终的使用结果看,该方法能满足对电阻触摸屏精确识别的需要,是一种完善的数据处理算法。

Resistive touch screen is widely used in the electronics industry. However, due to the diversity of error, particularly the application in the precise identification, there are greater difficulties. This article explains the reasons for systematic errors and random errors of resistive touch screen. A new algorithm based on the acceleration model to identify pen events and eliminate the effects of random error in the pen events is presented. The algorithm includes the judgement of pen-down, pen-moving and pen-up, eliminating the phenomenon of ＂flying spot＂ ,＂ bouncing＂ and ＂dragging tail＂, data interpolation in Breakpoint, detailed flow chart of data processing software ,etc. From the final results, the method can meet the needs for precise identification of resistance touch screen. It is a complete data-processing algorithm.