基于无线射频识别传感标签的形状记忆合金增强复合结构低速冲击响应监测  

Low Speed Impact Test for Shape Memory Alloy-reinforced Composite Structure Based on Radio Frequency Identification Sensor-tags

作　　者：袁江[1] 邱自学[1] 邵建新[1] 吴静雅[1] 陈宇天[1] 俞云雷[1] 郭永海[1] 

机构地区：[1]南通大学机械工程学院,南通226019

出　　处：《机械工程学报》2012年第18期89-96,共8页Journal of Mechanical Engineering

基　　金：国家自然科学基金(50875132;51110105008);江苏省研究生创新计划(CXZZ12-0863)资助项目

摘　　要：对埋入形状记忆合金(Shape memory alloy,SMA)丝的增强复合材料结构,提出一种利用传感标签技术实现结构健康无线分布监测的新方法,以解决传统有线监测方法存在的布线难、系统扩展和移动性能差等问题。采用基于高精度时间数字转换技术的专用电容测量芯片PS021测量复合结构中的SMA丝间的微小电容信号,可以很好抑制寄生电容的影响提高电容的测量精度;分布的传感标签获取PS021的电容测量信号,并与时间、位置编码信息打包后无线传输给读写器,传感标签之间无须通信,能耗要求低;组网采用三层读写器网络拓扑结构,通信协议简单、实时处理能力强。低速冲击响应监测试验表明,系统能实现对埋入结构中NiTi超弹性自传感元件的监测,根据冲击试验获取的多通道电容测量数据可分析判断损伤的位置和程度。A new wireless monitoring method for shape memory alloy（SMA）-reinforced composite structure is proposed by using sensor-tag technology.It can solve problems of traditional structural health monitoring method such as complex cabling,poor expansion,hardly mobility.Using high accuracy time to digital conversion（TDC） technology,the capacitance signals of the SMA are measured by PS021,it can restrain the influence of parasitic capacitance and improve the measurement precision.The capacitance signals are packaged with the current time and address code information by sensor-tags and transnitted to the readers,there are not communication between two sensor-tags and have merit of low energy consumption.Using three layer network topology structure,the monitoring system have features of simple protocol and good real-time processing capability.The low velocity impact experimental results show that the system can monitor the outputs of the embedded superelastic wires in composite structures and the damage location and performance can be determined by the multi-channel capacitance measurement data.

关 键 词：复合结构 结构健康监测 形状记忆合金 传感标签 冲击试验 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置] TB381[自动化与计算机技术—控制科学与工程]