Under the application research of mobile platform, this paper individually studies android-based wireless sensor network coordinator and smart phone-based GPS positioning system. By designing and developing a mobile phone map service system on android platform, our system contains modules including GPS positioning, map pattern, route query, location search, moving track, record list, etc. We also design and realize general scheme of android platform-based GPS positioning system including function analysis, functional block diagram, anterior curtain layout and Activity skip-process behind-the-screen, and the structure for system database.
Gas insulated switchgear (GIS) has been widely used in global power grids currently. However, there are several disadvantages of GIS which will cause partial discharge (PD) in the insulation and then make GIS shut down. In this paper, the application of the ultra high frequency (UHF)method for partial discharge monitoring is discussed in detail, including the placement of the UHF sensors , detection system and the different characteristics of the different defects in the PD signals diagram are analyzed as well. Finally, some relevant conclusions are drawn based on Finite-Diffrenee Time-Domain algorithm (FDTD) for simulation of the electromagnetic waves by UHF PD detection technology.
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