The objective of this study was the development of the automated system for crack detection on square steel bars used in the automotive industry for axle and shaft *** automated system for thermographic crack detectio...
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The objective of this study was the development of the automated system for crack detection on square steel bars used in the automotive industry for axle and shaft *** automated system for thermographic crack detection uses brief pulsed eddy currents to heat steel components under ***,if present,will disturb the current flow and so generate changes in the temperature profile in the crack *** changes of temperature are visualized using an infrared *** image acquired by the infrared camera is evaluated through an imageprocessing *** advantages afforded by the system are its inspection times,its excellent flaw detection sensitivity and its ability to detect hidden,subsurface *** automated system consists of four IR cameras (each side of steel bar is evaluated at a time),coil,high frequency generator,and control place with *** system is a part of the inspection line where the subsurface and surface cracks are *** the crack is present,the cracked place is automatically *** components without cracks are then deposited apart from defective *** system is fully automated and its ability is to evaluate four meter blocks within 20 *** is the real reason for using this system in real industrial applications.
We design, fabricate and characterize a 4-layer 110mm×44mm Si 3 N 4 PIC with long routing waveguides and arrayed waveguides gratings based on a wafer-scale integration process for a high-resolution interferometr...
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ISBN:
(纸本)9781957171258
We design, fabricate and characterize a 4-layer 110mm×44mm Si 3 N 4 PIC with long routing waveguides and arrayed waveguides gratings based on a wafer-scale integration process for a high-resolution interferometric imager with 1200nm~1600nm bandwidth.
We present upstream signaling and localization for an indoor beam-steered OWC system using vision-based technology. We demonstrate a 1.2kbps upstream signaling and localization system which enables to identify a large...
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ISBN:
(数字)9781943580712
ISBN:
(纸本)9781728167626
We present upstream signaling and localization for an indoor beam-steered OWC system using vision-based technology. We demonstrate a 1.2kbps upstream signaling and localization system which enables to identify a large number of users with
The ability to resect a tumor completely is a key merit in preventing recurrence of the disease. In order to achieve more complete tumor resection the surgeon must clearly identify the tumor margins. This identificati...
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ISBN:
(纸本)9781509067374
The ability to resect a tumor completely is a key merit in preventing recurrence of the disease. In order to achieve more complete tumor resection the surgeon must clearly identify the tumor margins. This identification is even more crucial when the tumor growth is adjacent or in neurological structures, and therefore it is dangerous to remove extra tissue [1], [2].
Accurate measurements of oceanic whitecap coverage from whitecap images are required for better understanding air-gas transfer and aerosol production processes. However, this is a challenging task because whitecap pat...
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Accurate measurements of oceanic whitecap coverage from whitecap images are required for better understanding air-gas transfer and aerosol production processes. However, this is a challenging task because whitecap patches are formed immediately after a wave breaks and are spread over a wide area. The main challenges in designing whitecaps imaging instrument are the small field of view of the camera lens, processing huge numbers of images, recording data over long time periods, and deployment difficulties in stormy conditions. This paper describes the hardware design of a novel high-resolution optical instrument for imaging oceanic whitecaps and the automated algorithm processing the collected images. The instrument was successfully deployed in 2013 as part of the HiWINGS campaign in the North Atlantic Ocean. The instrument uses a fish-eye camera lens to image the whitecaps in a wide angle of view (180°).
When a marine target is detected by a mid-infrared detector on a sunny day, the target's information could be lost if it is located in sun glint. Therefore, we developed a new mid-infrared imaging system capable o...
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When a marine target is detected by a mid-infrared detector on a sunny day, the target's information could be lost if it is located in sun glint. Therefore, we developed a new mid-infrared imaging system capable of effectively detecting marine targets in regions of strong sun glint, which is presented in this report. Firstly, the theory of the analysis methods employed in different detection scenarios is briefly described to establish whether one or two polarizers should be utilized to suppress further the p-polarized component of sun glint. Secondly, for the case in which a second polarizer is employed, the formula for the optimum angle between the two polarizers is given. Then, the results of our field experiment are presented, demonstrating that the developed system can significantly reduce sun glint and can enhance the contrast of target images. A commonly used imageprocessing algorithm proved capable of identifying a target in sun glint, confirming the effectiveness of our proposed mid-infrared polarization imaging system.
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