The application of welding robots has effectively improved labor productivity, improved the labor intensity of workers, and has good stability. Visual sensing technology can be empowered for intelligent welding automation, which can help welding workstations to complete welding tasks more accurately. It can detect the shape, size, position and welding quality of the welding seam. This paper describes the structure of the intelligent welding robot workstation system, the carrying mode of visual sensing, and the working principle of various visual sensing technologies in welding seam positioning, welding seam tracking, welding quality detection, etc. Detailed descriptions of the current mainstream line structure light method, point structure light scanning method, multi-line structure light method and surface structure light method are given respectively. These technologies have their own characteristics, and need to be matched with the application scenarios in actual application. Welding vision technology can help enterprises better control welding quality, improve production efficiency, reduce production costs, and provide more possibilities for the development of welding industry.
To achieve optical biopsy for gastro-intestinal (GI) endosopy with the use of nonlinear optical (NLO) endomicroscopes, integration of NLO technology with the design of a conventional flexible GI endoscope is necessary. One key challenge has been to design an NLO distal tip which can be compatible with flexible GI endoscopy retroflexion curvature radius as small as 20 mm to provide bending angle up to 210 degrees; the state-of-the-art NLO miniaturized design still consists of a long rigid “needle” shape probe at the distal end that can be damaged during the retroflex procedure when passing through the instrument channel of a flexible GI endoscope for in vivo imaging. To circumvent this design challenge, authors present a line scan multiphoton endomicroscope utilizing a novel simplified microelectromechanical systems (MEMS) scanner. This unique MEMS scanner consists of a customized single-axis dichroic MEMS scanner (SADMS) and vibrates at the back focal point of a customized micro-objective lens. This work demonstrates the new NLO scanner design can be compatible with conventional flexible GI endoscope to offer in situ functional microscopic imaging capability.
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