摘要
在无线传感器网络所处环境中,由于强电磁或短距无线通信频率共存的原因,传感器节点间的短距无线通信常常会受到干扰甚至中断,针对这个问题,研究了一种短距声通信方式,将信号调制于声信号上,通过空气中声信号的传播来完成节点之间的数据通信。首先介绍了本设计的传感器网络节点的硬件结构,以无线射频通信作为主通信方式,声通信作为协通信方式;接着针对物理层上的声通信进行了设计,并介绍了声通信的实现过程及与声通信相关的ARM程序和FPGA控制逻辑部分程序的工作流程。最后的测试实验表明设计的传感器节点间的短距声通信方法是可行的。
In the environment of wireless sensor network, due to strong electromagnetic field or the coexistence of short-distance wireless communication frequencies, short-distance wireless communications among sensor nodes may be disturbed and even be interrupted. Aiming at solving this problem, a kind of short-range acoustic communi- cation mode which modulates signals on the sound waves and completes data communication among nodes through the propagation of sound waves in air is studied. Firstly hardware structure of WSN nodes of this design is intro- duced, which conducts radio frequency communication as the main communication mode and acoustic communica- tion as synergic communication mode. Then designing acoustic communication on the physical layer and introducing realization process of acoustic communication and program work flows of ARM and FPGA control logic part which is about acoustic communication. The final test results show that the short-range acoustic communication method among sensor nodes of this design is feasible.
出处
《科学技术与工程》
北大核心
2014年第4期66-68,79,共4页
Science Technology and Engineering
基金
国家自然科学基金(51075375)资助
