略谈平面设计中的触觉体验

本文通过对触觉设计这一设计理念的论述,探讨材质在平面设计中的表现以及如何在平面设计中合理的运用触觉感受来传达信息,提高设计品质。     

竹质建筑装饰构件应用研究

随着中式风格的风靡,中式的建筑装饰构件在市场上的需求越来越大,例如中国古代的窗格在装饰中起着画龙点睛的艺术效果。本次的研究将本着利于装配,降低物流成本的原则,利用窗格设计作为载体,推广竹质建筑装饰构件的应用。同时,竹集成材具有各种优势,并符合可持续发展的国情,做到环保、生态的要求,竹质建筑装饰构件将具有无穷的市场潜力。     

物位计测量技术分析及应用研究

雷达物位技术是物位测量技术中发展较快的技术之一,但我国雷达物位仪表的研发还比较落后。分析了雷达物位计市场所占比重最大的两种测量方式——雷达脉冲测量和连续波线性调频测量的信号处理方式,比较了它们各自的优缺点,并指出了在应用中应注意的问题;同时,探讨了物位计开发过程中的技术难点,并根据我国现有的技术条件提出了相应的解决方案。     

小波变换在雷达物位计信号处理中的应用

雷达物位计信号处理的关键是去除噪声,提取有用信息.通过研究调频连续波FMCW雷达物位计工作原理及信号处理的基本算法,对比传统的采用傅里叶变换进行信号处理的方法,提出了采用小波变换来去除回波的干扰信号.实际应用结果表明,小波分析可以有效地应用于分析物位计回波信号,为提高测量精度等后续工作的开展提供稳定数据.     

Wireless sensor node powered by aircraft specific thermoelectric energy harvesting

An energy autonomous wireless sensor system consisting of an energy harvesting power source, an energy management unit and a low power wireless sensor node is tested for aircraft applications. The autonomous power source combines aircraft specific outside temperature changes with a thermoelectric generator (TEG) and a heat storage unit. The temperature difference generated with the latter component artificially at the TEG is used to power the sensor node by thermoelectricity. Additionally, a high efficient low input voltage power management circuit is necessary to store the generated energy and to convert it to higher voltage levels needed to operate the sensor. The experimental data are compared with results from numerical simulation models to predict the energy conversion in the heat storage - TEG system. A new TEG prototype is tested and the energy output is improved by 14%. The power management storage capacitors are adapted to the available energy, thereby increasing storage voltage and conversion efficiency. Doing so, the efficiency of the complete system can be increased by around 50%.     

From embedded sensors to sensorial materials—The road to function scale integration

Ubiquitous computing is about to become part of our everyday lives by integrating hundreds of “invisible” to us computing devices in our environment, so that they can unobtrusively and constantly assist us. This will imply more and smaller “invisible” sensors, homogeneously distributed and at the same time densely packed in host materials, responding to various stimuli and immediately delivering information. In order to reach this aim, the embedded sensors should be integrated within the host material, heading towards sensorial materials. The first step is to omit all parts that are not needed for the sensorial task and to find new solutions for a gentle integration. This is what we call function scale integration. The paper discusses sensor embedding in the human hand as an example of integration in nature, new technological applications and main challenges associated with this approach.     

温度触觉传感器的材质识别仿真研究

采用温度触觉传感器对材质进行识别研究,介绍了一种基于热传导原理的材质识别方法,利用ANSYS软件对温度触觉传感器在不同温度差、不同基板材料和不同被测物体材料不同情形下的热传导进行了仿真实验。仿真结果表明:温度触觉传感器可用于识别吸热系数偏低的材料,接触温度可作为材质识别的一个重要判据。     

窄带同步相位检测在商品电子防窃系统中的应用

给出了一种基于同步相位窄带检测电路实现的EAS系统检测器,并给出了原理和实现方法。     

A short and versatile finite element multiscale code for homogenization problems

We describe a multiscale finite element (FE) solver for elliptic or parabolic problems with highly oscillating coefficients. Based on recent developments of the so-called heterogeneous multiscale method (HMM), the algorithm relies on coupled macro- and microsolvers. The framework of the HMM allows to design a code whose structure follows the classical finite elements implementation at the macro level. To account for the fine scales of the problem, elementwise numerical integration is replaced by micro FE methods on sampling domains. We discuss a short and flexible FE implementation of the multiscale algorithm, which can accommodate simplicial or quadrilateral FE and various coupling conditions for the constrained micro simulations. Extensive numerical examples including three dimensional and time dependent problems are presented illustrating the efficiency and the versatility of the computational strategy.     

Magnetoelectric transducer with high quality factor for wireless power receiving

To achieve strong power coupling, a resonance-type magnetoelectric (ME) transducer with high quality factor is developed to achieve strong ME coupling. The ME transducer employs a type of iron–nickel-based ferromagnetic alloy with constant elasticity and piezoelectric Pb(Zr,Ti)O₃ (PZT8) material. The dynamic magnetomechanical behavior of the ferromagnetic alloy is investigated. The result indicates that the strain coefficient of the ferromagnetic alloy at resonance achieves 557.07 nm/A due to the high effective mechanical quality factor of the alloy. The transducer is designed to operate as a half-wavelength, longitudinal resonator. The dynamic performance of the transducer is evaluated by measuring its electrical and vibrational characteristics. The results reveal that (1) the resonance of the transducer occurs at the frequency of 26.9336 kHz with a strain coefficient of 314.74 nm/A, an effective mechanical quality factor of 1600; (2) the ME voltage coefficient achieves 30.07 V/Oe (i.e., 375.875 V/cm Oe) at resonance; (3) the ME output power density at optimal load resistance of 25 kΩ achieves 0.956 mW/cm³ under 0.3 Oe root-mean-square AC magnetic field. The performances indicate that the transducer is promising for ME energy conversion application.