Qing Hui Wang

Research and Improvement of LEACH Protocol for Wireless Sensor Networks

The data transfer of wireless sensor network (WSN) can not be separated with routing protocol, Energy efficiency is one of the most important factors in wireless sensor networks. In this paper based on the uneven distribution of the LEACH cluster head and the different lengths and base station communications, we present a improved LEACH algorithm which refers to remaining energy and optimal cluster heads. Computer simulation using NS2 reveals that the proposed protocol reduces the energy consumption compared with the existing LEACH protocol.

Application of antenna diversity technique on Wireless Sensor Network localization

Node localization is becoming a hotspot in international research of WSN (Wireless Sensor Network) nowadays. Distance measuring, as the core of all location algorithms, may cause large range error. RSSI??Received Signal Strength Indication??, one of the common methods of distance measuring in WSN node localization, is very sensitive to the environment, thereby it causes great range error. The antenna diversity technique, mostly used to enlarge the capacity of channels and expand the cover range of the signal in order to improve the quality of the transmission signal, is applied in the WSN node localization. Compared with the traditional RSSI distance measuring, the location accuracy is effectively improved.

Visual Simulation of Node Localization for WSN Based on Vega Prime

Visual simulation can simulate a variety of situations of actual scene in real-time through the establishment of the virtual scene similar to a real scene. This paper studies on the node localization system for WSN (Wireless Sensor Network). In order to be able to observe the specific information of the node location for the wireless sensor network visually, we can construct scene model and texture process by Creator, then use Vega Prime to develop the visual simulation of node localization for wireless sensor network in the VS2005 platform, and demonstrate the node localization for wireless sensor network in real time and realistically.

Implementation and Application of DSP-LCD Driver Based on Framebuffer

The implementation of LCD driver based on Framebuffer in uClinuxwas introduced. Firstly describe the Framebuffer processing mechanism and the underlying driver interface functions, and conduct a concrete realization on ADSP-BF561 platform; Secondly, based on Framebuffer, the embedded graphical user interface MiniGUI was described briefly, and conduct a transplant on ADSP-BF561 platform; Finally, the actual test results verify the correctness of the work.

Design of the Video Image Acquisition System Based on ADSP-BF561

This Article design a video image acquisition system implementations which is based on ADI Corporation Blackfin561 DSP , using OV7660 CMOS image sensor for the video input source and advanced JPEG2000 image compression algorithm under the operate system of the uClinux. It achieves a video image acquisition, processing and transmission. Test results show that the PC side you can see clearer images.

The Design of Queue System in an Embedded Platform

The design of the Queue-Based ARM development uses embedded technology to develop Windows CE-based ARM core platform Queue System. The Queue system can queue up calling number, customer evaluation, queuing information storage, queuing information tips and other functions. Call queuing function support repeat calls, priority calls, queues and merging functions; Customer evaluation function to support customers on operational staff operating results of evaluation; queuing information storage functions will queue information and customer evaluation information stored in back-end database. This design comparing with the market Queue System has the advantage of using an embedded operating platform. The host computer system is small. A new type of ACD (Automatic Call distributing) call end systems that support customer evaluation system is used with using embedded database to store data files. Data storage is more flexible.

Design of the Magnetic Separation Column Overflow Liquid Surface Monitoring System Based on Digital Image

The design has developed a the digital image processing system used to identify the magnetic separation column overflow liquid surface state, it identifies overflow liquid surface of normal situation and iron ore powder leak situation, and the system is partly implemented with visual C++ programming. The system consists of image processing and pattern recognition of two parts. The system can be calculated using magnetic separation column overflow the liquid surface texture parameters related, through these texture parameter and image recognition experiment set up some samples and, thereby, to identify parameter variation of the overflow the liquid surface provide reliable data basis.

Design of the Embedded Video Image Monitoring System Based on B/S Mode

Relying on powerful image processing capabilities and special parallel peripheral interface which is based on the ADI Corporation Blackfin561 DSP and using advanced H.264 video compression algorithm under the operate system of the uClinux. The implementation scheme of video image monitoring system based on B/S mode is proposed. By running the web boa server under the uClinux on the BF561 platform, the system realizes the video image acquisition,processing and network transmission.The result shows that the client can see the clearer images through the browser and the system meets the requirements of the remote video monitoring.

The Study of Wireless Sensor Networks Based On-Line Monitoring System for Fire

In order to improve the efficiency of fire and reduce losses of life and property, in this paper,wireless sensor network is applicated in the fire and rescue. Wireless communication module chip is chipcon cc2430.Using temperature sensor and measuring pulse sensor,the data information of the temperature and pulse hops of person is transmitted to the terminal management system by wirelessly.Convenient the external person of scene command the fire scene.Practice shows that wireless sensor networks based on-line monitoring system firemen are great market potential.

The Research and Implementation Based on Electronic Gases Simulation System of Wireless Sensor Network

Currently, in view of the rapid development of social economy, many problems about fire safety to be solved urgently exist in fire rescue. Therefore, the advanced wireless sensor network technique is applied in modern fire rescue. Firstly, this paper gives a brief introduction about, introducing the significance of wireless sensor network technology applied in simulation fire training system. Secondly, it introduces the basic design principle of electronic gases. Finally, it studies the functions of the system design and realization of the key technology.