Applied Mechanics and Materials Vols. 556-562

Abstract: The circuit structure and the sampling principle of single battery voltage detecting circuit were introduced. Switching network timing of single voltage sampling was described, and voltage conditioning circuit parameters were calculated. There were some errors in the measurement results. Through the analysis of the main sources of the errors, corresponding correction strategy was given. The test results showed that experimental results after correction were more accurate and stable.

Abstract: Geothermal resource is a kind of clean energy source. There is rich fracture structure in Jilin city of Jilin province and it has a good geothermal geological conditions. Using CSAMT method and selecting the appropriate technical parameters, we can survey controlled thermal structure in the measured area. The collected data is processed and combined with the known geological and hydrological condition. Interpreting the data, base fluctuations and spatial distribution of buried faults can be got. Then, deep groundwater-rich region and the depth of reservoir burial are inferred.

Abstract: At present, the ability tolerated voltage of single component is limited, so on some occasions, it can’t meet the demand of tolerated voltage of electrical equipment and thus we must make many components in series to enhance the ability of tolerating voltage.When the components of withstand voltage are used in series, we always hope every component can load the voltage equably. Because the character of component of withstand voltage is in random, even the components which are used in series are the same type, this circumstance that every component can’t load the voltage equably also can appear. Even in case one of component is damaged, it can trigger a chain reaction which results in the rest also are damaged. The purpose of research about this topic is to design a measurable device which can judge the voltage whether is equably distributed on every component in series or not on the basis of single chip microcomputer. By exerting a high voltage on many components of withstand voltage in series, then measure the voltage on every component to judge the components whether have a good effect for loading voltage equably, according to this judgment to choose the components which can load voltage equably .

Abstract: Due to lack of the general electrical parameters test platform for smart ammunitions, this paper discussed main technical parameters of the general electrical parameters test platform for smart ammunitions based on its test resource requirements, electronic measurement technology and response signal during stating the general detection system and the concrete structure of general test platform. The main technical parameters include sampling frequency, measuring range, resolution ratio and dynamic behavior. The construction of platform test software is also elucidated. At last, building feasibility of the general electrical parameters test platform for smart ammunition is proved at the theoretical level.

Abstract: As the voltage level to improve, DC bias problem of power transformers increasingly prominent. When the DC current affects the transformer, transformer laminated core magnetization characteristics inside will be affected by magnetic saturation increased. Aiming at this problem, the model of the load side and a smart experimental platform are established, for the measurement of related data such as the excitation current under DC bias. Based on MATLAB software, analysis summarized the laws of physics, to provide a reference for theoretical research.

Abstract: Solar storms and power engineering HVDC, make the earth there geomagnetic induced current and direct current. If the DC current into the neutral grounding transformer, the transformer will be caused bias magnetic phenomena, changing its excitation characteristics, interfere with the normal operation of power systems and equipment. This paper considers the impact on the excitation characteristics of hysteresis effects, establishing excitation characteristics calculation model, proposes an improved graphics corresponding method to calculate and analyze the open circuit excitation characteristics of single-phase transformer in three columns under DC bias, the experimental results prove the validity of the proposed method.

Abstract: This paper designs a Ka-Band satellite antenna using parallel differential evolution (DE). The antenna is of wide beam-width and left hand circular polarization (LHCP). The electromagnetic numerical value is calculated by the improved software NEC2 based on the method of moments. The parallel differential evolution computing platform consists of some computers and MPI is used as the messaging protocol among computers. The single-arm Ka-Band antenna with 8-segments designed in this method has obtained very good performance including gains, axial ratios and VSWRs in a shorter period.

Abstract: Electronic license operating system is mainly including passive electronic license applications and information technology systems integration of physical construction ideas. This paper introduces a practical application of the anti-metal UHF RFID tag antenna, relying on the existing license plate, the metal plate as part of the antenna to solve UHF RFID tag for metal surface problems. Establishment of cloud computing, combining sea calculation the physical integration of information systems to meet the needs of car networking operations.

Abstract: A Multi-layer mush-like EBG used as the reflector of dipole antenna is discussed. The paper focuses on the reflection phase feature of Multi-layer mush-like EBG surface. Compared with classical double layer EBG reflector which has one in-phase frequency the proposed structure can realize two or more in-phase frequencies resonance thus could be used as double frequency antenna reflector. The simulation results proved that the proposed EBG structure had a good return loss meanwhile both radiating patterns of the two frequency bands meets the expectations well and the antenna’s gains of the two bands are more than 7.08dB

Abstract: According to the need of the real-time monitoring and displaying of the environment in many areas,to put forward a method of temperature monitoring and displaying, using STC11F32XE microcontroller as the core controller, DS18B20 as temperature acquisition chip, 32X64LED dot matrix screen as a display screen,using the mothod of multi point detection method,real-time monitoring of swimming pool water temperature and room temperature, real-time displaying of Multipoint collecting information, Real time processing the detected temperature, the page display to multipoint temperature display through the wireless remote control module,the system will alarm When the water temperature is too high or too low, to remind managers of real-time processing.To design a clear temperature display for the swimming pool,real time monitoring and controlling is very convenient,after the experimental verification, the system reaches the anticipative goal,the system is an ideal and effective.