High-Performance Wireless Piezoelectric Sensor Network for Distributed Structural Health Monitoring
High-Performance Wireless Piezoelectric Sensor Network for Distributed Structural Health Monitoring
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DOI：
10.1155/2016/3846804
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发表时间：
2016-03
影响因子：
2.3
通讯作者：
Shang Gao;X. Dai;Zheng Liu;G. Tian
中科院分区：
文献类型：
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作者：
Shang Gao;X. Dai;Zheng Liu;G. Tian
本文介绍了一种用于分布式大规模结构健康监测的无线压电传感器平台的开发，该平台实现了高达12.5 Msps（采样率每秒）的实时数据采集和分布式lamb波数据处理。在提出的无线PZT网络中，在结构表面部署一组PZT换能器，激发兰姆波，并检测其在结构内的传播特性以识别损伤。所开发的无线节点平台采用TMS320F28335数字信号处理器（DSP）和改进的IEEE 802.15.4无线数据传感器RF233，数据速率高达2mbps。每个节点最多支持8个PZT传感器，其中一个作为致动器产生任意频率的兰姆波，同时检测其他PZT传感器的响应振动。除硬件外，本文还设计了嵌入式信号处理和分布式数据处理算法作为无线监控网络的智能“大脑”，提取PZT信号的特征，从而显著减少无线链路上传输的数据量。
This paper presents the development of a newly designed wireless piezoelectric (PZT) sensor platform for distributed large-scale structure health monitoring, where real-time data acquisition with high sampling rate up to 12.5 Msps (sample per second) and distributed lamb-wave data processing are implemented. In the proposed wireless PZT network, a set of PZT transducers are deployed at the surface of the structure, a lamb-wave is excited, and its propagation characteristics within the structure are inspected to identify damages. The developed wireless node platform features a digital signal processor (DSP) of TMS320F28335 and an improved IEEE 802.15.4 wireless data transducer RF233 with up to 2 Mbps data rate. Each node supports up to 8 PZT transducers, one of which works as the actuator generating the lamb-wave at an arbitrary frequency, while the responding vibrations at other PZT sensors are sensed simultaneously. In addition to hardware, embedded signal processing and distributed data processing algorithm are designed as the intelligent “brain” of the proposed wireless monitoring network to extract features of the PZT signals, so that the data transmitted over the wireless link can be reduced significantly.