Zhang Qinghui

GUI design of Grain Monitoring and control system based on QT

GUI (Graphical User Interface) is one of the major achievements on computer development, compared with the traditional interface. It is more acceptable visually for users. This paper gives the design methods about Grain Monitoring and Control System, which is based on S3C2440 ARM9 as hardware platform and Linux2.6 kernel as Qt/Embedded application development. The result indicates that the finished system has the features of advanced technology, stable running, simple HMI, high performance and low cost. Moreover, it is easy to expand.

Research of Key Algorithm in the Technology of Fingerprint Identification

This article systematically elaborated the correlation theories of fingerprint recognition technology and several essential algorithms. Combining the characteristic of fingerprint image in the pretreatment process, key technologies of fingerprint pretreatment have been studied, including fingerprint image intensification which is based on the gradation standardization, the directional diagram and filter, uses the auto-adapted algorithm based on partial smooth threshold value to carry on the binaryzation. The experimental result indicates that the processing effect is good.

Research on the Three Dimensional Indoor RFID Positioning Algorithm

The absolute locating problem between the reader and the RFID tag is discussed and the related pseudo range linearization expression is provided. Then the relative locating formula by the nearest neighbor algorithm is deduced. The corresponding simulation result shows that the nearest neighbor algorithm can improve the positioning precision greatly.

Application Research of Neural Network in Zigbee Locating System of Mine

Zigbee networks are new complicated networks which have mang tiny nodes. The zigbee network nodes are described with neuron and the zigbee networks are described with neural networks. The neural networks model of zigbee locating system of mine are given in the paper and utilized for data integration of locating information. The result indicates that the neural model of zigbee brings convenience for zigbee study.

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.

Research on Mine Through-Earth Communication System Based on Spectrum Spreading Technology

Based on the analysis on the through-earth communication using the basic principle of information theory, spectrum spreading technology is adopted to solve the problem that the received signal in through-earth communication is weak. And the technology scheme of through-earth communication is designed. Finally the reliability of the scheme is verified by simulation.

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.

Research on electrocardiograph center system based on ASP medical pattern

The thesis has studied the electrocardiograph center system which is based on ASP medical pattern. Firstly, the medical treatment ASP pattern is established, and ECG center based on medical ASP pattern is analyzed. How the system is realized is introduced. The result has indicated that it can resolve the problems of medical software cost and being short of medical expert.