姿态感知鼠标指针的控制方法*

作者：葛海江1,陶姗2 日期：2009-04-21/span> 浏览：4140 查看PDF文档

姿态感知鼠标指针的控制方法*

葛海江1,陶姗2
（1.杭州职业技术学院 信电系，浙江 杭州 310018；2.杭州职业技术学院 机电系，浙江 杭州 310018）

摘要：针对传统传感器无法实现鼠标指针空中运动姿态的感知，通过比较两轴加速度传感器和陀螺仪的差异性，提出了采用两轴陀螺仪来实现鼠标指针定位的方法。详细阐述了两轴陀螺仪静态时旋转角度的测量方法、动态旋转角度变化率的计算、指针灵敏度系数的优化及鼠标指针两维位移变化量(ΔX,ΔY)的计算。考虑到在电压下降或环境温度变化后，陀螺仪会发生零点漂移，提出了一种动态自校正的算法，对零点进行自校正，对完成校正的时间进行了测量，并实现了满意的校正效果。该技术目前已应用于无线空中鼠标之中。
关键词：两轴陀螺仪；旋转角度变化率；鼠标指针；漂移；动态自校正
中图分类号：TP212.9文献标识码：B文章编号：1001-4551(2009)03-0105-03

Control method of posture sensing mouse pointer
GE Hai-jiang1, TAO Shan2
（1.Department of Communication and Electronic, Hangzhou Vocational and Technical College, Hangzhou 310018, China；
2.Department of Mechanical and Electrical Engineering, Hangzhou Vocational and Technical College, Hangzhou 310018, China)
Abstract: Aiming that traditional sensor cant realize the posture sensing of mouse pointer, by comparing the differences between the two-axis acceleration sensor and two-axis gyroscope, the mouse pointer localization method using two-axis gyroscope was put forward. The measurement method for static-state revolving angle of two-axis gyroscope, the change rate calculation of the dynamic revolving angle and the optimization on the sensitivity coefficient of the mouse pointer as well as the ΔX and ΔY calculation of the mouse pointer were expounded in detail. Considering that the voltage drop and the change of environmental temperature would cause the zero drift of two-axis gyroscope, a new algorithm for dynamic self-tuning was presented and satisfactory results were achieved. The technology has been integrated into the production of wireless air mouse.
Key words: two-axis gyroscope; revolving angle changing rate; mouse pointer; drift; dynamic self-tuning
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