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A monitoring system was built for the landslide of the transmission tower in Maoxian, Sichuan Province, China. Two kinds of optical fiber sensors were used to measure surface displacements and deep displacements. Precipitation was measured by the automatic rain gauge. All these measured data were transferred back to control center by GPRS. There is a good positive correlation between the surface displacement...
Taking Mianyuan River Basin as case study, the co-seismic landslides were detected automatically using decision-making tree method on ALOS satellite imagery post the 2008 Wenchuan earthquake. These landslides cover an area of 48.5km2. The distribution of landslides was dominated by the seismogenic fault. Furthermore, the lithology determined the type of landslides. Shallow disrupted falls were mainly...
Landslides cause great harms to transmission line corridor in mountainous area. This paper uses a method of identifying landslides to evaluate harmfulness to power towers. First, the mountainous area is classified as nine categories in terms of polarimetric decomposition techniques and clustering algorithm. Second, landslides are detected based on the change of areas before and after a landslide with...
In recent years, insulating tubular bus-bar has been widely used in power systems for its excellent electrical performance. However, as some new electrical equipment, there is still no unified principle at home and abroad, and little research is done on its operating characteristics. This leads to a confused market, and some abnormal operating phenomena appear in operation. In this paper, a 35kV insulating...
Flood is one of serious natural disasters in the word. Synthetic aperture radar (SAR) has become a popular tool to detect the flood disaster for its distinct benefits such as retrieval of surface information, penetrability, and availability in all weathers. This paper aims to analyze microwave scattering characteristics of soil from low water content to semi-flooded status based on ground-scatterometer...
In this paper, we propose a new algorithm for power line identification and extraction from high resolution remote sensing images. Theoretically, it is difficult to detect power lines in satellite images due to some characteristics, such as sub-pixel, weak target, discrete and the complicated background. To our knowledge, the problem of extraction of the power lines from satellite images is faced...
This paper developed a method of validation test research of domestic satellites LST products. The experimental data include high resolution landsat8 image, low resolution FY-3B and MOD11A1 LST product. The main steps of the method are as follows: (1) Three different algorithms for retrieving land surface temperature on landsat8 data. Through the comparative analysis of the results, we select an algorithm...
Fine registration is a fundamental step for further application of remote sensing images. Focused on deficiencies in traditional manual registration, this paper presents a new method for automatic fine registration of multi-spectral images. To make the most of image information, the algorithm detects and matches feature points in the selected bands. Then pick up the common control points which contain...
Online monitoring of power devices' state is a very important part of the Smart Grid (SM) building plan. Icing on the overhead transmission lines cause great accidents and vast economic loss. In China, icing monitoring technology and relative research is a hot point. The current operating icing monitoring systems based on electrical measurement do not work efficiently because it cannot solve the problem...
Icing on overhead power transmission line is a serious problem that affects the secure operation of power system. This paper firstly analyses transmission line icing damage and the advantage & disadvantage of various current online monitoring techniques. Then, the implementation scheme of a novel method, which based on the sensor network of fiber optic sensor, is introduced. Through measuring...
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