Advanced Materials Research Vols. 706-708

Abstract: The influence of incident beams polarization degree on the SPR phase sensor is theoretically and experimentally studied in this paper. The results indicate that the decrease of the polarization degree will lead to the phase difference curves jump decrease near the resonance angle for the ellipsometry method. Besides, the lower the polarization degree, the smaller the jump, which can also lead to reduced sensitivity of the SPR phase sensor. For example, the sensitivity with the polarization degree of 0.9 is 90% that of the polarization degree of 1.

Abstract: The Liquid Surface Pressure Control is the key factor for the guarantee of Low Pressure Die Casting Quality. Regarding to the disadvantages of conventional PID Control such as pressure fluctuation, poor repeatability of the pressure curve, and so on, we propose Liquid Surface Pressure Control System (LSPCS) based on Fuzzy Adaptive PID. Design method of Fuzzy PID Controller has been discussed, and the realization methods of the hardware and software in this system are developed. This proposed system has a good performance in practice.

Abstract: The space magnetic field is produced by a current-carrying coil. According to the triangle rule, whenever the difference of results measured by the magnetometer between the coil switching the current on and off is less than the calculated value of the coil magnetic field, the magnetometer functional mode is normal. When the magnetometer is at the critical state of the normal work, the coil magnetic field gradient is its gradient tolerance. The Cs-3 optical-pumping magnetometer gradient tolerance is 20000nT/m by experiment. Measurement result can be used for magnetic environment optimization and cesium probe assembly.

Abstract: This paper aims at utilizing BP neural network and improved BP neural network in the extraction of moving targets from the static background and the motor background. Across introduces of L_M Optimization method to improve the BP neural network, combination the difference between the consecutive frames or difference from the background for the extraction of moving targets. The paper uses one types of image segmentation improved BP neural network for extraction of moving targets from the static background. We will obtain the same moved targets with the extraction of moving targets from the static background and the motor background. After experimental verification, this method on different objects in the context of the same detection ability is better.

Abstract: In order to realize the automation of farming, the alarm system based on CC2530 was designed in this paper. This study used the temperature and humidity sensor SHT10 to collect data. The system reversed the type of data to the integer. The system was based on the CC2530 which is integrated with the ZigBee protocol. To achieve the effect of the automatic alarm, this work set a standard temperature value. When the actual temperature exceeded it, the system called the buzzer automatically and made all the LED lights work. And the value of temperature and humidity after the conversion would be displayed on the LCD screen. The system can complete the control of temperature and humidity in the greenhouse.

Abstract: As an important tool, intelligent robot has been widely used in information detection, household service, the old persons’ patrol, business reception, military battlefield, and other fields. Especially in the harsh environment, it is urgently need to adopt intelligent robot instead of human for environmental exploration and information collection. Due to the transmission network security, to ensure that communication data between the intelligent robot and remote operator is private and secure, this paper mainly studied on the encryption scheme of the communication data based on the AES algorithm using the CPLD/FPGA device, working in the mode OFB.

Abstract: In order to solve the measurement problem of the shield tail clearance in the shield construction, the shield tail clearance automatic measuring system which is based on digital image processing technique has been developed in this paper, hardware and software are both designed in this system, and the image features can be extracted by image enhancement, thresholding and edge detection which are digital image processing technology, and the clearance is calculated. Field tests show that the system has a friendly interface and is easy to be operated .What is more, the clearance can be measured automatically with high accuracy and stable performance, It provides security for the shield construction.

Abstract: Conventional control of tunnel boring machine can't achieve the ideal effect because of the complexity of its work process, uncertainty of construction environment. In order to solve the question, the intelligent control is expected. The neural network control has many characteristics such as self-adaption, self-organization, and can modify the corresponding parameters by learning about external knowledge, so it becomes research focus of tunnel boring machine control system in recent years. In this paper the advantage and disadvantage of several kinds of neural network used in the tunnel boring machine control are introduced, the development trends of tunnel boring machine control is predicted.

Abstract: The main topic is on doing research and testing methods and theories of the triple-junction solar cell and design its electrical performance test platform. Provide a theoretical basis and feasible experimental triple-junction solar cell performance testing. The electrical properties of the electrical properties of solar cells is the main consideration for its use as a power, a very important one is the spectral response curve of the test. Demonstration program and platform for the entire system, the P / N junction between the optical and electrical characteristics of multi-junction solar cells affect each other, related to the key issues, including: monochromatic excitation light source, optical bias, the theory and technology of electrical bias, weak signal detection. Important application prospects based multi-junction solar cells, its theoretical method and test device to become an important and innovative topic.

Abstract: This paper design a solar heating water supply system which can use solar energy , the system is better than the traditional water supply system in the past .The PLC centralized control and intelligent control system can use more full solar energy to save resources and protect environment for the purpose of saving energy .