Jin Guangfeng

Research on Zigbee Locating System Based on the Multi-Hop Weighted Centroid Algorithm

Zigbee node locating is one of the key technologies in wireless sensor network. Through the analysis on the existing single-hop centroid algorithm, a multi-hop weighted centroid locating algorithm has been put forward. The weighted factor is determined by the different impact of beacon node on unknown node so as to improve the locating accuracy. Multi-hop weighted centroid locating algorithm is simple when calculating and communication among the nodes is cost-free when locating. The algorithm is based on the strength of received single (RSSI). The simulation has showed that it has achieved a better locating accuracy.

Correction of signal induced noise for Photo-Multiplier Tube

Photo-Multiplier Tube is the key of photoelectric conversion subsystem of light detecting and ranging. When it is exposed in an intensive light, the response of PMT systems becomes nonlinear, that is, the output count rate is no longer proportional to the incident light intensity. A nonlinear effects caused by the intensive light are analyzed in this paper and the errors induced by the nonlinear effects are measured. According to these measurements, two different corrections of these nonlinear effects are proposed and the result of correction is reasonable. This electronic document is a “live” template. The various components of your paper [title, text, heads, etc.] are already defined on the style sheet, as illustrated by the portions given in this document.

Stress Analysis and Intensity Design of Electromotor Used in Hazardous Location Present Powder and Explosives

The design formula of the thickness of the encloser is educed according to the first intensity theory in material mechanics. The intensity of the encloser is designed with the common explosion insulation three-phase asynchronism electromotor of YB2 100L2-4. And the finite element simulation to the encloser by ANSYS shows that it is reliable in intensity with the thickness.