This paper presents the development of a newly designed wireless piezoelectric (PZT) sensor platform for distributed large-scale\nstructure health monitoring, where real-time data acquisition with high sampling rate up to 12.5 Msps (sample per second) and\ndistributed lamb-wave data processing are implemented. In the proposed wireless PZT network, a set of PZT transducers are\ndeployed at the surface of the structure, a lamb-wave is excited, and its propagation characteristics within the structure are inspected\nto identify damages. The developed wireless node platform features a digital signal processor (DSP) of TMS320F28335 and an\nimproved IEEE 802.15.4 wireless data transducer RF233 with up to 2Mbps data rate. Each node supports up to 8 PZT transducers,\none of whichworks as the actuator generating the lamb-wave at an arbitrary frequency,while the responding vibrations at other PZT\nsensors are sensed simultaneously. In addition to hardware, embedded signal processing and distributed data processing algorithm\nare designed as the intelligent ââ?¬Å?brainââ?¬Â of the proposed wireless monitoring network to extract features of the PZT signals, so that\nthe data transmitted over the wireless link can be reduced significantly.
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