Advanced Materials Research Vols. 753-755

Abstract: Partial discharge is an important content of insulation monitoring of high-voltage power equipment, which generates high-frequency signals and real-time monitoring data is of great quantity. Simultaneous detection of multi-channel signals faces technical difficulty, and of high cost and poor reliability, it can also cause unnecessary waste of resources. In accordance with the characteristics and needs of partial discharge monitoring system at substation site, the concept of time-division multiplexing technology in communication technology is adopted into the multi-channel signal acquisition and measuring system, which using multiplexer MAX4638 and virtual instrument. The designed multiplexer for the partial discharge monitoring overcame several shortcomings, such as hardware resources consumption, poor reliability and high cost in multi-channel synchronous acquisition. By using of polling method to achieve one detection device for the time-sharing acquisition and processing of multiple devices or signals, this device can greatly enhance the on-line monitoring system economically and practically in the field application.

Abstract: Optical electronic monitoring system is widely used in battlefield assessment, forest fire preventing, road monitoring, etc. This paper proposes an optical electronic monitoring system based on multiple-sensor. Multi-sensors use common optical route in this the system. It means to get the same scene in the same time. In order to extend the transmission distance, reducing the complexity of the wiring, the system design a transform module. Through the transform module, the system transforms CamerLink standard signal to network package and uses network transmission image.

Abstract: In this paper, we explore the implementation of fault simulator for small-delay faults on Graphics Processing Unit (GPU). Nowadays the size of integrated circuit is getting smaller and smaller, the clock frequency has become faster and faster, which leads to the effects of small delay fault on chip and is also increasingly obvious. Small delay simulation has become highly important, it is directly related to the accuracy of product and its time to market. At the same time, small delay simulation is a very time consuming process, which requires constantly looking for ways to accelerate the simulation. In recent years, GPU has been used to accelerate the programs of intensive computation in many areas and has achieved very good results. Based on these two points, we consider combining the parallelism of small delay simulation with the high parallel computing ability of GPU to accelerate small delay simulation. Experimental results indicate that our approach is on average 42 when compared to the traditional fault simulation engine.

Abstract: The thesis is based on summing up the features of high voltage grounding grip single-phase to-ground process to analyze the characteristics of zero sequence current, zero sequence voltage, voltage phase mode transformation and current phase mode transformation. It provides solution to pick out single-phase to-ground faulty lines at the exit of converting stations by waveform recognition in the principle that voltage transformer injects signal to interfere zero sequence current, and the integrated faulty line detection that consists of waveform recognition, wavelet analysis and energy analysis, and it introduces the single-phase to-ground faulty line detection in small current earthed system.

Abstract: A de-interlacing method for video surveillance in intelligent substation is presented in this paper. Firstly, a framework for performance evaluation is proposed so that the subjective performance of de-interlacing will not matter in applications such as video compression. Then pre-filtering is performed to remove potential noise, and a hierarchical structure is introduced for same-parity field pictures or opposite-parity field pictures to get more reliable optical flow results for compression. Finally the optical flow results are used to improve the accuracy of block-based methods for each partition of the to-be-interpolated image and the final motion vectors are determined. Experimental results show that the proposed solution can achieve both better peak signal-to-noise ratio (PSNR) performance and visual effects.

Abstract: In view of the problem about off-line monitoring lagging and the high cost of cable transfer with present traditional petrochemical enterprise, this article provides remote monitoring system design and implementation of the heating furnace based on the Zigbee wireless transmission technology. Specifically, configuration software can realized real-time monitoring of furnace combustion condition by sending detected smoke real-time data which goes through flue gas analyzer to Siemens PLC, and transferring it to the industrial computer by Zigbee wireless transmission technology. Simulation result shows that the system has well real-time performance and low power consumption advantages which can complete effective monitoring in the wireless environment of furnace combustion state.

Abstract: In recent years, there are a lot of safety accidents in China's coal mine, it causing heavy casualties and huge economic losses, so the coal mine production safety situation is very grim. In order to improve this situation, we research and design a set of coal mine safety monitoring system. Its underlying uses a technology which is ZigBee, it is short-range, low-speed wireless networks, and it connecting the coal mine of numerous sensor and video surveillance systems. Monitoring interface uses a Web way constitute a complete set of coal mine safety monitoring system in order to be able to burst in coal mine disasters in a full range of monitoring, and to avoid the occurrence of safety accidents. In this paper, the overall coal mine safety monitoring system theory and specific design.

Abstract: With the development of the 3D technology, the construction of a 3D substation monitoring system becomes feasible. The Unity3D is a professional and comprehensive engine for providing advantages in fast deployment, architectural visualization, and 3D animation. It can support multiple platforms and make the development much easy with an expansive architecture involved. In the normal use, we build 3D model with tools such as the 3DMax, and import the models to Unity3D. By the means, we can finish making scenes and cartoons as well as integrating business data. We can also design multive functions such as the roaming in first person view, camera switching, real-time monitoring data displaying, real-time alarming, and so on. We write custom Shader to achieve some special effects. For example, we can write vertex and fragment shader to receive the data from the scripts and parse the data to get the information of temperature points. The distance between each UV point and the given temperature points is also computed and mapped to the values of temperature and color.

Abstract: According to difference absorption spectrum mixed gas absorption spectrum in technology overlapping problem, a DOAS technology based on the PSO and LS-SVM fusion method was proposed. First, SO₂, NO respectively to construct a quantitative analysis model by LS-SVM, And then, using PSO is strong optimization ability of least square support vector machine (SVM) the optimization of the parameters of the algorithm, and then, LS-SVMs parameter are optimized with PSO of the powerful searching ability, Finally, rebuilt the quantitative analysis model. Experiments show that using the improved DOAS method is feasible in solving the mixed gas spectrum overlap problem which has certain practical significance.

Abstract: The analysis algorithm of parallel factor, combined with fluorescence spectroscopy of three dimensions are used to study the organics identification in petroleum for impurities in surface water and concentration measurement, analysizing the effects on measurement of the coexist of multi-component petroleum pollutants. Treating gasoline, kerosene and diesel as samples, through a mixed solution of a variety of different proportions to imitate the state of coexistence of a variety of petroleum organic, studying PARAFAC in a variety of characteristics of the mixed solution component. Experiment focused on the Steam diesel hybrid solution, Wood kerosene mixed solution and Steam wood kerosene mixed solution, and it can separate their different fluorescence spectrums from the complex mixed composition of three dimensional fluorescence spectrum data matrix. It realized the simultaneous measurement for the main factor in composite samples. And it also calculates the average error rate of concentration .The result indicates that PARAFAC can realize petroleum pollutants composite sample identification and concentration measurement.