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6 April 2012 A preliminary study on the use of optical navigation sensor for two dimensional crack propagation monitoring
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Abstract
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 an optical flow method 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 exhibits a strong linearity under 2D movement and can track the movement quiet well.
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Chih-Chen Chang, Sin-Hang Man, Cheng Zhong Ng, Muhammad Hassan, and Amine Bermak "A preliminary study on the use of optical navigation sensor for two dimensional crack propagation monitoring", Proc. SPIE 8345, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2012, 834532 (6 April 2012); https://doi.org/10.1117/12.914546
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