【摘要】 介绍加速度传感器MMA7260的工作原理、结构及功能,提出了一种采用MMA7260提取步态特征的有效方法.实验中,MMA7260与微控制器ADUC841组成一个测试系统,由MMA7260捕获步态的加速度信号,微控制器的内置模数转换器对其进行采样和A/D转换后,就得到了步态的特征数据,将其存储到静态存储器中.步态特征数据通过串口被送入计算机,借助于Matlab可以看到周期性的步态特征信号波形.更多还原

【Abstract】 Introduces the principle of accelerometer MMA7260 and discusses a direct and effective method for gait feature extraction with MMA7260. In order to extract gait feature, a test system, which is mainly composed of MMA7260 and microcontroller ADUC841, is designed. After capturing the acceleration signal of gait through adopting MMA7260, the signal is sampled and converted to the characteristic data via the built-in ADC of microcontroller. Then the characteristic data of gait are saved in SRAM. Having transmitted the characteristic data of gait to the computer through serial port, we can see their waveform via the Matlab. This verifies the method is effective.更多还原