Remote Impedance-based Loose Bolt Inspection Using a Radio-Frequency Active Sensing Node

This paper introduces an active sensing node using radio-frequency(RF) telemetry. This device has brought the traditional impedance-based structural health monitoring (SHM) technique to a new paradigm. The RF active sensing node consists of a miniaturized impedance measuring device (AD5933), a microcontroller (ATmega128L), and a radio frequency (RF) transmitter (XBee). A macro-fiber composite (MFC) patch interrogates a host structure by using a self-sensing technique of the miniaturized impedance measuring device. All the process including structural interrogaerion, data acquisition, signal processing, and damage diagnostic is being performed at the sensor location by the microcontroller. The RF transmitter is used to communicate the current status of the host structure. The feasibility of the proposed SHM strategy is verified through an experimental study inspecting loose bolts in a bolt-jointed aluminum structure.
Publisher
The Korean Society for Nondestructive Testing
Issue Date
2007-06
Keywords

Loose Bolt inspection; Impedance; Piezoelectric Materials; Radio Frequency; Active Sensing Node

Citation

Journal of the Korean Society for Nondestructive Testing, Vol.27, No.3, pp.217-223

ISSN
1225-7842
URI
http://hdl.handle.net/10203/9310
Appears in Collection
CE-Journal Papers(저널논문)
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