Applied Mechanics and Materials Vols. 687-691

Abstract: With the rapid development of computer hardware, parallel computing cluster is becoming more and more powerful. It becomes focus of attention that how to make full use of the parallel abilities in computing cluster for grid service faster and more agility in the analysis of power system simulation. This paper introduces the optimization and implementation of power system parallel computing management platform based on online and offline power system research. It improves the computing resource utilization, enhances the general platform, standardizes management of computing interface at the same time and realizes the application process can be configured for the customs. At present, the optimization and implementation of power system parallel computing management platform has been successfully applied to online warning research and auxiliary decision in the power system, and it is also applied to offline study prediction, collaborative system for power grid operation mode calculation and so on.

Abstract: With the continuously intelligence of power grid, and as an important part of it - the power distribution network is undertaking a variety of tasks, result in flow in the network increasing sharply and then arising much block in the business of power distribution network, therefore, how to efficiently operate the distribution network is imminent. In this paper, we apply the PNT technology to solve it. Firstly, introducing what the PNT is, and then describing its application in the power distribution network, bringing out its principle, operation framework and so on. After analyzing, we find that it really succeed in improving effective utilization rate of the network resources, such as routers, links and so on, and also can reroute the business data flow when there is a failure in the path. At last, put forward its achievement in the control of power distribution network flow.

Abstract: This paper describes the design of a CAN bus network industrial data acquisition and control system based on the application layer protocol, the CANO pen protocol. The structure of the control system is for the distributed control system. In this paper, it discuss the network for data acquisition and control system, Ethernet access control system, and provides convenience for remote control and data acquisition and processing. The software part of this design is the real-time operating system, which make the system more secure, efficient operation.

Abstract: This paper analyses the working principle of magnetic coupling resonant wireless power transmission system based on mutual inductance coil model, and then gets the expressions of load power and transmission efficiency. By the theoretical analysis the relations between the various system parameters such as: coil size, transmission distance, load resistance, the resonant frequency and load power, transmission efficiency are obtained. According to the results of theoretical analysis, the system’s characteristics of load power and transmission efficiency with varying transmission distance are studied. Finally, simulations verify the accuracy of analysis by Matlab/Simulink.

Abstract: A single-stage PFC converter was introduced in this paper, then the converter EMI filters, converters inductors, high-frequency transformers and power components were designed and chosen, proven to good effect.

Abstract: To the high maintenance cost for changing wireless sensor’s battery in Internet of Things (IoT), a hybrid ambient energy harvesting system for wireless sensor’s power supply is proposed. The system can collect the ambient RF energy, vibration energy and light energy, converts them into DC supply. This paper focuses on the analysis and design of the hybrid energy harvesting antenna, using a novel structure to combine three energy receivers in one antenna, which reduces the size and the cost effectively. The antenna operates at both 3G mobile frequency (1.9GHz) and 4G mobile frequency (2.6GHz), the measured input return loss is 24.3dB and 19.9dB, respectively.

Abstract: This paper presents the design of a compact 2.45 GHz microstrip rectenna for wireless sensors’ power supply. In energy harvesting system, the ambient RF energy can be collected by the rectenna and converted to direct current, therefore, it can be applied to the power supply of low-power wireless sensor. Voltage doubling rectifier circuit and T-type microstrip impedance matching network are applied to this rectenna to increase the output voltage and the rectification efficiency. The antenna is fabricatied ​​by using double PCB board (FR4), and it is optimized by ADS to achieve the best performance. The measurement results show that the rectifier can reach the highest conversion efficiency of 78% when the load resistance is 320 Ω and the input power is 18 dBm. It also greatly improves rectenna’s conversion efficiency at lower input power when the input power is-20 dBm, which has great practical value for supplying low power consumption sensors.

Abstract: Rational utilization of greenhouse environment control technology can greatly increase crop yield, improve product quality, realize the agricultural production, increasing farmers' income. For greenhouse nonlinear, time-varying, time delay and multivariable coupling problem, the temperature, humidity, light intensity and the concentration of our fleet, and other factors affecting the analysis, the fuzzy inference is applied to the control systems of greenhouse environment, and transforms expert experience and knowledge behavior into the corresponding fuzzy control rules; combined with theory of PID, and temperature and humidity as control variable fuzzy PID system is established. The simulation results show that the system response speed, strong anti-jamming capability, combined with theory of PID, it has a better control effect on the temperature and humidity in the greenhouse environment, and provide some reference for the design of intelligent greenhouse automatic control system.

Abstract: This paper-based design Kinetics ARM-Cortex M4 MK10DN512ZLL10 microprocessor detecting through the use of electromagnetic sensors has 10mH 100mA alternating current conductor, a continuous analog signal obtained through the solenoid to the LM358 chip amplifier many times the signal amplifier circuit , and then the analog signal is converted by the algorithm into a digital signal, and these values ​​can be obtained through a filtering process after a smooth and accurate digital microprocessor for processing.

Abstract: In this paper, a novel high sensitive nanobiosensor based on the combination of F₀F₁-ATPase molecular motor and Φ100nm tapered optical fiber is described, which as we known has never been reported before. Since the tapered optical fiber tip is well matched with the F₀F₁-ATPase complex in size, a superb sensitivity is theoretically expected. Experimental results show that this nanobiosensor’s sensitivity is about 3.5 times higher than the result of the experiment conducted on a F₀F₁-ATPase modified ordinary Φ50μm multimode fiber biosensor. The detecting time could be decreased correspondingly. Therefore a cheap, high sensitivity ,fast response, single molecule detection of biomolecules such as epidemic viruses would be achievable using this tapered optical fiber-based F₀F₁-ATPase nanobiosensor.