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Recently, a public attention to ground subsidence due to the subsurface cavities in the urban area is growing. To prevent such catastrophe, a ground-penetrating radar (GPR) technique is being widely used to image and detect roadbed cavities. In this paper, properties in timedomain of antenna configurations are investigated to construct a bistatc GPR system. The system is categorized into two types:...
The ability to overcome rough terrain is a main issue of mobile robots. However, as the speed of a robot increases, stability becomes another issue because it is directly related to the mobility of the robot. Without stability, the robot is exposed to risks of overturn. Therefore, a mobile robot needs to be not only maneuverable but also stable. We present a new mobile platform named “Rocker-Pillar”...
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