基于Android系统的五维手写信息采集设备的设计

Design of 5D Handwriting Information Collection Device Based on Android System

针对当前各类触摸屏不支持获取手写过程中所施加的三维力的问题,设计了一种五维手写信息采集设备。通过将多维力传感器集成于触摸屏下方,实现了手写过程中三维力和二维位置的准确获取,同时在设备搭载的Android系统中添加了自定义的系统服务模块,使设备从系统级别实现对五维手写信息获取的支持。对于设备在移动环境下使用所产生的干扰问题,它使用加速度传感器结合自适应滤波器技术进行抑制。结果表明该方案可行,设备具有一定的抗干扰能力,且可实现无触控笔操作,方便用户使用。

Currently most touch screens cannot support the measurement of 3-D forces of handwriting. To addressthis issue,this paper proposes a design of device that extracts 5-D information of handwriting. By integrating a multidimensional force sensor under the touch screen,it acquired 3-D force and 2-D position information accurately. Be-sides,its onboard Android system was incorporated with our customized system service module,thereby fully sup-ports 5-D handwriting information measurement at the operating system level.For the interference produced in themobile environment,it uses acceleration sensor combining with adaptive filter technology to suppress. The result in-dicates that the proposed scheme has the advantages of good feasibility and better anti-disturbance properties. More-over,users can enjoy the convenience of operating without stylus pen.