用于空间手势输入的无陀螺微惯性测量单元设计  

Design of Gyroscope-Free Micro Inertial Measurement Unit for Gesture-Based Interfaces

作　　者：王祥雒[1] 杨春蕾[2] 郑瑞娟[2] 

机构地区：[1]洛阳师范学院信息技术学院,河南洛阳471022 [2]河南科技大学信息工程学院,河南洛阳471000

出　　处：《传感技术学报》2014年第2期208-212,共5页Chinese Journal of Sensors and Actuators

基　　金：国家自然科学基金专项基金项目(61142002);河南人才培养联合基金项目(U1204614)

摘　　要：针对三维空间手势输入的特点,提出了一种基于双路三轴MEMS加速度计的对称配置方案及角速度、线加速度解算方法。该方法使用两个三轴MEMS加速度计以及对称的硬件布局构成无陀螺微惯性测量单元,基于积分法计算测量单元的角速度和质心处线加速度,利用角速度解析式中的冗余信息对解算积累误差进行估计并实施误差补偿。该方案避免使用陀螺组件,两路加速度计在长轴方向上的对称编排方式保证了测量单元的小体积、狭长几何特征,便于手持;相应的角速度解算方法形式简单,适用于采样时长短、测量单元横滚角变化量小的三维空间手势特征提取和识别领域。仿真实验证明了该方案的可行性和有效性。Considering the peculiarities of the gesture-based interfaces,a symmetrical configuration scheme of dual MEMS accelerometers is presented,and the relative algorithm for calculating angular velocity and linear acceleration is described. The gyro-free micro inertial measurement unit is constructed from two triaxial MEMS accelerometers with the symmetrical layout,its angular velocity and linear acceleration of the center is obtained by integral method. Meanwhile,the redundant formula held by this method is used for estimating and compensating the iterative error. By employing the symmetrical structure on the major axis,the unit is small and narrow,it is convenient for holding. The relative algorithm with low overheads is applicable to the situation of measuring spatial gesture characteristics, as the sampling time is short and roll angle varies slightly. The simulation results show the feasibility of the scheme and the efficiency of the algorithm.

关 键 词：手势输入 微惯性测量单元 MEMS加速度计 误差补偿 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]