Advanced Materials Research Vols. 542-543

Abstract: An online slab quality diagnosis & analysis system named CISDI_SQDS ONLINE R2011 has been presented in this paper. The system is based on mechanism of defects, which mainly refer to surface crack & internal crack, heat-transfer & solidification simulation, stress & strain calculation and metallurgical process analysis about continuous casting. Combining with BP neural network, several kinds of quality loss factors are used to describe the possibility of inducement. Meanwhile, the respective crack formation indexes are introduced to be the theoretical reference data for slab quality level evaluation and guiding production. The CISDI_SQDS ONLINE R2011 system was firstly applied on the No.1 Slab Continuous Caster of Bayi Steel in China. It is preliminary proved that the model is reliable and reasonable. It can be widely used as an important theoretical tool for prediction & control for slab quality in continuous casting process.

Abstract: Nb based superconducting coplanar waveguide resonators on oxidized silicon wafer were fabricated and characterized at different temperatures. Crosstalk between two single resonators fabricated on the same chip was observed. When microwave signal is sent to the input of either resonator, output from both resonators show almost the same resonant frequency and similar quality factors.

Abstract: This paper provides the theory, mathematics analysis and experiments in support of the Infrared thermal-wave inspection on the subsurface defects in a solid using linear frequency modulated light excitation (LFMTWI). The specimen is heated by the heat flux of linear frequency modulation for launching thermal-wave into the sample in a desired range of frequency. The more thermal wave responses characters are obtained, and the IR thermal-wave imaging shows much more advantages for subsurface defects detection. The simulation and experimental results from steel sample are presented in support of this technique.

Abstract: Dynamic performance in the H-type stage as precision positioning system is important specification to guarantee precise accuracy. As the range of the H-type stage has increased, the dynamic performance affects the settling time of the H-type stage. This article concentrates analysis of the dynamic modeling of the H-type stage with rotational flexure joint. The dynamic modeling of the H-type stage was analyzed using Lagrange method assumed as lumped mass-spring system. The dynamic modeling of the H-type stage was verified by the experiment.

Abstract: This paper has adopted photoelectric conversion technology and computer application tech-nology , together with the Microsoft Visual C++6.0 software, developed a test system that consists of software and hardware, which involved the precision test and movement parameter calculating of the roller gear cam indexing driven. Experiments proved that the reliability and testing precision of this system are preferable.

Abstract: Under SEM the micromorphology of chafer cuticle is observed as follows：chafer cuticle is a typical natural composite plate reinforced with cross-fiber laminates and on its surface a series of holes with a diameter of 50~70μm which are distributed 40~50μm apart from each other. Inspired by an idea to construct bionic materials, these microstructures are simplified by a porous composite model with cross-fiber layer by layer. By further considering this kind of bionic microstructure, the stress concentrations of microporous induced to sense amplification are uncovered. In order to investigate the influence of microporous quantity and distribution on such sensing amplification, a series of simulations with different microporous conditions were performed , and the results show that with pore number increasing, the comprehensive stress- amplified effect improves, while as pore number increasing to a certain value, such comprehensive stress- amplified effect approaches a constant value.

Abstract: A MRF fluid engine mount with controlled annular access, inertia track and decoupler is designed. Through the experiment it can be seen that the low frequency performance of the mount is greatly improved. Then the dynamic low frequency performance of the mount using the fuzzy PID control method of two degrees-of-freedom system in different engine speed is simulated and the results show that the fuzzy PID control method is effective to reduce the body acceleration.

Abstract: This paper introduces the mechanism of High-field Asymmetric Waveform Ion Mobility Spectrometry (FAIMS). By using the LabVIEW PDA module which supports the WinCE 5.0 development, a single-chip ARM9 embedded control system for FAIMS is proposed. Compared with conventional "Master + Slave" computer models, the proposed model is able to reduce hardware cost effectively as well as shorten software development cycle. It also downsizes the main controlling circuit board and reduces the power consumption of the entire system. We describe the functions and implementation process of each part in detail, and finally give the detecting results of FAIMS. Sufficient test results validate the stability of FAIMS system. This paper provides a new engineering solution to future similiar embedded systems, and a reliable technical support for some existing embedded systems as well.

Abstract: The global calibration of multi-sensor measurement system is difficult to accomplish, usually, it needs external high-precision measurement equipment. A novel global calibration method based on common planar template is proposed. Stereo vision combined with laser linear-structured light is adopted to constitute a 3D vision sensor system (3DVSS). Stereo calibration of the 3DVSS can be finished by the planar template calibration method. For the global calibration of multiple vision sensors, it only needs a common planar template which is one of the planar templates can be seen synchronously by every camera in 3DVSS. The homography matrix between the coordinate systems of the 3DVSS and the common planer template can be calculated. The global coordinate is established in the common planar template, so the local coordinate system (LCS) of each 3DVSS can be transformed to the global coordinate system (GCS) through the common planar template. Two experiments have been used to test the proposed method, and the experimental results show that the proposed method is flexible and effective.

Abstract: Because of shortcomings of images of motion objects in deep space，including non-uniform distribution of background pixels，low SNR, general 1ow picture quality and small size，a novel image segmentation algorithm based on the combination of image gradient and its variance is adopted. An algorithm to compute the correlation coefficient based on the small region template matching is presented. The algorithm overcomes the disadvantages of correlation disturbed frequently by noise, and size difference, besides it also reduces the computational complexity and improves the speed of the system．Experiments show that the algorithm has great accuracy，high speed，and good stability，and can meet the requirements of a real-time system.