一种面向航空结构的具有穿透能力的无线节点

A Wireless Node with Structure-Penetrating Ability for Aircraft Structures

针对结构健康监测中应用的无线节点结构穿透能力差的问题,提出了一种面向航空结构的具有穿透能力的433 MHz无线节点的设计方法。给出了节点的详细硬件设计及通讯协议设计方法,实验对比了所设计节点和常规应变测试系统的应变测试结果,验证了节点设计方法的正确性。在封闭飞机机翼盒段内部布置节点,实验对比了所设计节点和基于2.4GHz的Telosb节点的通信丢包率。结果表明,所设计节点的结构穿透能力强于Telosb节点。功耗测试结果也表明,所设计节点的功耗小于Telosb节点。

In order to increase the structure-penetrating ability of a wireless node in structural health monitoring,this paper presents a design method of a wireless node with structure-penetrating ability for aircraft structures that works at a frequency of 433 MHz.The hardware implementation and network protocol design were introduced.The design method of the wireless node was verified experimentally by comparing the strain monitored by the designed wireless node and conventional strain test system.The structure-penetrating ability of the designed wireless node was proven to be stronger than that of a 2.4GHz based Telosb node by comparing their respective packet loss rates while they were in a carbon fiber composite wing box.The energy consumption measurement results show that the energy consumption of the wireless node was less than that of the Telosb node.