Advanced Materials Research Vols. 760-762

Abstract: The structure design and pressure control of electro-hydraulic braking system (EHB) is essential for electric vehicles, which is critical to the braking energy recovery and vehicle stability control. In this paper, the overall structure of the electro-hydraulic braking system is analyzed, and classification method according to how the braking pedal is decoupled with the braking pressure is proposed. Through the PID control method to achieve pressure following control, it lays the foundation for electric vehicle stability control.

Abstract: Software test is the important means that guarantee software quality and reliability, and in this respect,it plays the role that other method cannot replace. However software test is a complex process , it needs to consume huge manpower,material resources and time,which takes the 40%~50% of entire software development cost approximately . Paper presents the inherent in software test case designing based on genetic algorithm is using genetic algorithm to solve a set of optimization test cases, and the framework includes three parts which are test environment construction, genetic algorithm and the environment for test .

Abstract: Some typical latest research results were summarized according to the analysis and research on the current situation of software testing both at home and abroad in this paper. On the basis of the current researches on software testing, the writer discussed the future research topic on software testing and proposed the assumption on software testings subject, industry and technique development. It laid the foundation both for further boosting the development and formation of software testing discipline system and for effectively studying on the scientific development mechanism of software testing techniques and its industry.

Abstract: Introduced the Design and Implementation of fire monitor terminal base on the hardware platform of ARM. The image quality is improved with the use of CCD monitoring camera to capture image, and Pan/Tilt/Zoom are used to focus the fire area, enhance the accuracy of fire image recognition. This paper presents the system architecture and its functional characteristics. Emphasis is put on the hardware design of image capture and Pan/Tilt/Zoom control module. Finally, the software structure and implementation is described and the laboratory result is given. Compared with other similar image monitoring system, this system has the advantage of simple structure, high image quality, stable and reliable, feature-rich, etc.

Abstract: To produce a better uniform magnetic field along the direction of light propagation in studying magnetometer, a pair of rectangular coils are used instead of traditional Helmholtz coils. In this work, the magnetic homogeneity in the center of the rectangular coils is calculated and discussed theoretically. We measured the magnetic field distribution along the light propagation direction of the coils in experiment proving that the field has the relative fluctuation less than 1% in the range of 30cm along the direction.

Abstract: In this paper, we propose a new optical flow-based Poisson inverse gradient (OFPIG) initialization method for active contour tracking. This method can automatically initialize the contour of moving target for consequent tracking. First, an optical flow based motion detection method is adopted to remove background information, and then a Poisson inverse gradient (PIG) initialization is applied to locate the target region. Finally, parametric active contour is used to evolve the correct target contour depending on the initialization precision. Experimental results have demonstrated its effectiveness and robustness.

Abstract: The method of fault tree analysis is an important method for complex system reliability analysis of large scale. Fiber-access devices monitoring system is an important system of electric power communication transmission. Firstly it introduces the method of fault tree analysis, and then use the fault tree modeling technique for the fault tree to model refers to the fault of optical access equipment monitoring system, and carries on the qualitative analysis and quantitative analysis. It provides theoretical basis for system improvement and maintenancs.

Abstract: A new object tracking scheme for multi-camera surveillance with non-overlapping views is proposed in this paper. Brightness transfer function (BTF) is used to establish relative appearance correspondence between different views. Mixtures of probabilistic principal component analysis (MPPCA) is incooperated to learn the subspace of brightness transfer function with the concern to deal with multiple different brightness areas in a scene. The incremental major color spectrum histogram (IMCSH) is used as similarity measure for reliable matching. Experimental results with real world videos show the effectiveness of the proposed algorithm.

Abstract: Because the reasons of only reached part intelligent of existing energy meter and the difficulty of hardware upgrades, we propose a new design that is a modular single-phase multi-rate smart electronic meter based on MSP430 low-power single-chip. We used AD7755 as a dedicated power measurement chip to ensure the accuracy of the measuring pulse. In order to improve the reliability and usefulness of the electric meter, we have used the clock circuit, data storage circuit, display drive circuit, three kinds of communication circuits, and anti-tamper technology. Through making use of it, The multifunction smart meter is proved that it has a character of stable performance, accurate measurement. It is full compliance with national design specifications of IEC62053-22 and the active energy error met the accuracy requirements of class 0.5S.

Abstract: This paper designed an experimental system of microgrid which is composed of inverter-interfaced micro sources using droop control. DC power and IPM module were used to simulate the inverter-interfaced micro source, DSP2812 was employed to control the IPM. Load power sharing among different micro sources was achieved without communication. The experimental results have shown the correctness and validity of the designed scheme.