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Micro-solder balls are commonly used in wafer-level ball grid array (BGA) packages as an interconnection medium. To measure the height of a micro-solder ball on a metal pad, we propose a white light projection method to avoid interference from pads in the shadow of the ball. The optical projection of a solder ball under the illumination of a parallel white light beam is studied, and the relationships...
This paper is not to describe any new designs or theories. However, we would like to share some field experience in applied engineering. The applied robotics is not only designs or theories but the field experience as well. From the engineering-oriented and applying-oriented views, however, it was found that there was a long way to go from the lab design to the field application. In this paper, four...
Substation inspection has already benefited from developments in mobile robotics. Since 2002, over 10 substation inspection robots have been developed at Shandong Electric Power Institute. These robots carry visible light cameras and infrared thermographs which are used to detect invaders and equipments fault respectively. They move inside the substation and position for collecting images of possible...
This paper presents a new GPS and DR integration based navigation system for mobile robots in substation environments for inspection. An adaptive federated Kalman filtering algorithm is put forward to realize information fusion. Experiments have also been carried out to verify the functionalities of the system.
So far, the inspection of power line corridors is mainly carried out by manual or helicopters. However, manual inspection is very labour-intensive and inefficient. On the other hand, the cost of the inspection using helicopters is very high. Also the safety of helicopters cannot be guaranteed. In recent years, some researchers have started to use unmanned helicopters to inspect power lines. Nevertheless,...
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