Ultrasonic Spectroscopy for the Identification of Defects and Environmental Disturbances

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概要

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• Ultrasonic health monitoring of structures under realistic operating conditions is very difficult because ultrasonic waves are influenced by not only structural defects but also environmental disturbances. We examined a method of ultrasonic spectroscopy in this investigation to classify signal changes as either structural or experimental. We used aluminum plates to investigate the ultrasonic propagation characteristics with respect to the growth of defects (fatigue cracks, slits, and drilled holes) and the change in environmental disturbances (water drops, temperature, and load). The frequency dependency of the propagation delays and amplitudes of tone-burst waves differed for defects and environmental disturbances. Defects could be distinguished from environmental disturbances by monitoring the delay-amplitude plot lines of the tone-burst waves with increasing frequency.

• 一般社団法人 日本機械学会の論文

著者

• Toyama Nobuyuki

  Research Institute Of Instrumentation Frontier National Institute Of Advanced Industrial Science And

• Tsuda Hiroshi

  Research Institute of Instrumentation Fontier (RIIF)

• Takatsubo Junji

  Research Institute Of Instrumentation Frontier National Institute Of Advanced Industrial Science And

• WANG Bo

  Research Institute of Instrumentation Frontier, AIST

• URABE Kei

  Research Institute of Instrumentation Frontier, AIST

• TOYAMA Nobuyuki

  Research Institute of Instrumentation Frontier, AIST

関連論文

• Nondestructive Evaluation of Holed CFRP Laminates by a New Technique to Visualize Propagation of Ultrasonic Waves
• Hybrid Sensing Technology and Diagnostic Technology(International Workshop on Smart Materials and Structural Systems, W03 Jointly organized by Material & Processing Division, Material & Mechanics Division, Dynamics & Control Division and Space Engineering
• Laser-Generation Based Imaging of Ultrasonic Wave Propagation on Welded Steel Plates and Its Application to Defect Detection
• Generation Laser Scanning Method for the Visualization of Ultrasounds Propagating on a 3-D Object with an Arbitrary Shape
• Ultrasonic Spectroscopy for the Identification of Defects and Environmental Disturbances

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