24 July 2001 Application of portable modules for fatigue crack characterization
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This paper is dealing with the ultrasonic imaging techniques and instrumentation that are used for the inspection of aircraft and bridge structures. A concept of a modular inspection system with interchangeable components will be presented. The modular concept provides greater flexibility in the integration of various commercially available sensors and data acquisition units deployed by operators. Miniature scanning and interface modules were developed as components of the integrated system for wide area inspections using ultrasonic sensors. A novel ultrasonic imaging technique has been utilized for characterization of internal fatigue cracks. The technique is based on a linear scan acquisition and processing. Portable ultrasonic flaw detectors or thickness gages can be used to acquire the data. An image-processing module was developed to manipulate the acquired images and to display the inspection results. Several rapid scanning techniques have been developed to satisfy flaw detection and characterization criteria as well as the scanning and data acquisition module capabilities. The techniques and instrumentation were successfully tested on various aircraft and steel bridge structures.
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Igor N. Komsky, Igor N. Komsky, } "Application of portable modules for fatigue crack characterization", Proc. SPIE 4335, Advanced Nondestructive Evaluation for Structural and Biological Health Monitoring, (24 July 2001); doi: 10.1117/12.434185; https://doi.org/10.1117/12.434185

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