19 April 2013 Implementation of a wireless image motion estimation method for two-dimensional crack monitoring
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In this paper, a preliminary study on the development of a wireless image-based sensor for two-dimensional (2D) crack propagation monitoring is reported. This sensor contains an optical navigation sensor board (ADNS-9500) which is incorporated into the Imote2 IPR2400 platform. To monitor crack propagation, the Imote2 sends a signal to the ADNS-9500 to switch on the built-in laser and camera collecting images reflected from the concrete surface. The captured images are processed by motion estimation methods to obtain the relative displacement between images. A series of tests have been conducted to calibrate the accuracy of the proposed crack sensor. Results show that the crack sensor can track linear motion and sinusoidal motion quiet well under some a range of speed.
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Sin-Hang Man, Sin-Hang Man, Chih-Chen Chang, Chih-Chen Chang, Muhammad Hassan, Muhammad Hassan, Amine Bermak, Amine Bermak, "Implementation of a wireless image motion estimation method for two-dimensional crack monitoring", Proc. SPIE 8692, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2013, 86922E (19 April 2013); doi: 10.1117/12.2009427; https://doi.org/10.1117/12.2009427

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