基于LabVIEW的惯性测量单元信号采集及处理系统设计  

Developing IMU Signal Acquisition and Processing System Based on LabVIEW

作　　者：朱文发[1] 柴晓冬[1] 郑树彬[1] 李立明[1] 罗永建[1] 

机构地区：[1]上海工程技术大学城市轨道交通学院,上海01620

出　　处：《计算机测量与控制》2012年第6期1697-1698,1706,共3页Computer Measurement &Control

基　　金：上海市教育委员会科研创新项目重点项目(12ZZ184);上海市教育委员会科研创新项目一般项目(12YZ149);上海高校青年教师培养资助计划(gjd11023)

摘　　要：利用LabVIEW设计了惯性测量单元信号采集及处理软件,主要包括串口通信、数据分离及信号处理等模块;串口通信模块采用VISA方式编程,建立了惯性测量单元与上位机之间的通信;根据惯性测量单元输出数据的格式,利用LabVIEW中的匹配模式函数分离出沿三轴向的加速度信号和角速率信号;设计了一种用于去除加速度信号中低频成份的数字滤波器;在建立的陀螺漂移模型基础上,分别进行小波基、小波分解层数、阈值函数及阈值估计方法等小波参数的选取.The software for acquisition and process of the inertial--measurement--unit （IMU） signal which include serial communication, separation of the data and signal processing were programmed with LabVIEW; the serial communication between the IMU and upper computer was developed by VISA; According to the output data format, the signal of tri--axial acceleration and angular--rate were separated by Match Pattern Function; a digital filter for filtering the low frequency signal of acceleration was designed; on the basis of the gyro random drift mathematical model, the wavelet parameters which include wavelet base, wavelet decomposition level, threshold function and threshold estimation method were selected.

关 键 词：LABVIEW 惯性测量单元 串口通信 数据分离 数字滤波器 小波 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]