基于惯性传感器的体感手环教学系统的设计

Design of Teaching System of Somatosensory Bracelet based on Inertial Sensor

摘要:

针对课堂教学过程中需要手握激光笔遥控PowerPoint幻灯片翻页和话筒出现啸叫的问题，本文设计了体感手环教学控制系统，该系统采用基于蓝牙传输的无线控制结构，对体感手环的惯性传感器和接收装置等硬件电路和软件流程进行设计，重点研究并提出了基于惯性传感器的手势动作定义和特征提取，并对话筒啸叫消除的实现方法进行论述。实验测试数据表明，系统识别向左或右、向上或下一挥的手势动作成功率在92%以上，误动作率在4%以内，能够控制PowerPoint幻灯片向上或向下翻页以及控制无线话筒的音量大小，可以实时缓解话筒啸叫引起的干扰，实现设计效果。

Abstract:

In order to solve the problem of remote control of PowerPoint slides and microphone whistling in the process of classroom teaching, this paper designs a teaching control system, which adopts the wireless control structure based on Bluetooth transmission to design the hardware circuit and software flow of inertial sensor and receiving device. This paper focuses on the definition and feature extraction of gesture motion based on inertial sensor, and discusses the realization method of microphone squealing elimination. The experimental test data show that the success rate of gesture recognition is more than 92%, and the error rate is less than 4%, the system can control the PowerPoint Slide to turn up or down, control the volume of wireless microphone, and can real-time alleviate the interference caused by microphone roar, and achieve the design effect.