Advanced Materials Research Vol. 1055

Abstract: Nature gas is an important fuel. How to measure the gas amount precisely and how to utilize the gas properly, how to distribute the gas and how to calculate the fees of the gas are very significant to enhance economical benefits in the gas distributing station. In the designed control system, Computers are used in the measurement of the gas to compensate auto-online computation and calculate the flux of the gas automatically in the standard state .The system is provided with the function of the gas pressure adjustment, the charging and discharging the gas in the gas-globe-jar, the starting and stopping of the compressor, diagnosing the system failure, technical parameter over threshold alarming and the chain-protection of the system. The combination control software are used in the design to collect the data, monitor and control the objects in the system, so it is provided with convenience in operation and maintenance, and dynamical man-computer interface..

Abstract: In view of the mine special environment, with passive millimeter wave imaging technology applied to mine body hidden contraband detection as the background, this paper has design of miner detection system. This paper gives the miner detection system composition block diagram and working process, and design the data acquisition module, give the data acquisition module internal logical structure.

Abstract: For the situation that digital switching device interface testing is relied on manual and automatic testing system development cost is high, the paper has adopted the reconfigurable technology. And by using the reusable character of general testing system, a special testing system is built, which can solve the contradiction between testing benefit and testing efficiency. The new system consists of hardware reconfigurable matching front-end and software reconfigurable virtual instrument. It has improved the switching device interface testing efficiency and accuracy, and shorten the construction cycle. Its component parts are reconfigurable, and flexible to assemble. It has good generality and expansibility, and certain practical utility. The idea has also provided instructions for designing similar testing system.

Abstract: In the process of seismic wave field numerical simulation using finite difference method, the simulation accuracy and computational efficiency is one of the keys to the problem which is especially important to the numerical simulation of small scale geological body which velocity changes violently. In order to describe the local structure of medium subtly and guarantee the efficiency of the simulation, this article introduces the variable grid finite difference method to the staggered grid high-order finite difference numerical simulation on the basic of the traditional staggered grid finite difference algorithm to improve the staggered grid spatial algorithm and avoid the reduction of the simulation accuracy and computational efficiency caused by the interpolation factor. The results show that the variable staggered grid numerical simulation of finite difference algorithm can accurately depict the space variation of underground medium physical properties to further enhance the adaptability of numerical simulation of complex medium, it also can provide reliable basis for wave field imaging and the combined interpretation of p-wave and s-wave.

Abstract: In order to meet the people’s higher requirements on the living environment, electrical engineering in indoor decoration mainly adopts the hidden construction. This paper analyses from the selection of electrical materials, construction points and quality controlling and proposes the operating procedures and methods of some common problems in electrical construction in indoor decoration, so as to reduce the potential safety issues in indoor environment caused by electrical construction.

Abstract: Laser Initiation System is a type of high value initiating explosive device. The reliability of LIS can't be verified through mass of system firing tests. With the problem in hand, this paper combined with reliability characteristics of both F/S work type devices and repeatedly work type devices in LIS, presented an method of reliability evaluation for LIS. The practical verification shows that the evaluation method is effective and feasible, and it also can be a reference for the research on reliability evaluation of other high value initiation systems in the future.

Abstract: It designed a set of the demand of special digital filter module. The module of the estimation of the computation and storage put a window interpolation algorithm and the comparison between the required computation and storage. Reactive power energy metering system is designed based on active power metering design to join the digital filter. It studied two kinds of design method of digital filter, such as corrugated cut choice better than snow. The method designs digital filter. In the platform, the special digital filter module, digital filter module and active reactive power energy metering system have carried on the simulation respectively.

Abstract: As we know, the load of power grid keeps increasing in recent years, and the difference of power pink and trough is large. This situation causes the low efficiency of power consuming. In this paper, the integer coded genetic algorithm is used to carry on the reactive optimization of 35KV power gird, which includes operations of genetic algorithm, such as coding, selecting, crossing, and mutating. The genetic algorithm is illustrated in IEEE30 points system and the optimization of maximum operational mode, the results show that this method decreases the loss and ensure the qualified rate of voltages, realizing the optimization of the power gird.

Abstract: This paper focus on the study of Ceiling radiation assist with Ground source heat pump air conditioning system which to analysis the operation characteristic by experiment. By testing the ceiling, all round the room air temperature, air temperature, wall temperature and the floor temperature, research the fresh air temperature have influence on the indoor environment temperature and vertical temperature. At the same time, analyzes radiation plate heat transfer per unit area with the end of the air conditioning water temperature and flow relationship. Experiments show that when the room ceiling radiation + natural air to indoor vertical temperature gradient is the largest, the second is ceiling radiation + no fresh air, indoor vertical temperature gradient is the smallest ceiling radiation + preheat air condition, when the system is stable, 2 meters below the vertical temperature difference about 1°C.

Abstract: This article analyzes the circuit bar of EarthingSwitch (ES), identify the function of grounding system, clarify the different function between grounding system and rated current path. It provides an efficient method to design circuit bar for grounding system. The article collects the practical formula to design and to evaluate Copper bar. The recommended size for the ES and main grounding bar is referable for electric company.