检索结果-内蒙古大学图书馆

Electro-Optical and Infrared systems: Technology and applications ii

作者： Barth, Jochen Fendt, Alfred Kuffner, Herbert Pröls, Rudolf Rüger, Roderich Schmid, Christian EADS-LFK GmbH Landshuter Strasse 26 D-85716 Unterschleissheim Germany

A new firing post MILAN ADT ("advanced Technology") is developed by EADS-Lenkflugkörpersysteme GmbH with the aim to improve the performance of the MILAN weapon system substantially while maintaining all operational features to which MILAN operators are accustomed. The missile tracking sensor of MILAN ADT is now equipped with a single, wide field-of-view optics and a large CMOS detector covering both gathering and guidance phase. Using adaptive windowing and sub-sampling functions of the detector combined with differential imaging modes, all types of MILAN missile are localized with optimum precision over the entire flight path. Another novel feature is the integration of a thermal imager into the optical scheme of the MILAN ADT guidance unit. This replaces the earlier ancillary TIs MIRA and MILIS thus saving the weight of the additional housing and reducing logistic effort. The TI image is displayed on an internal micro-monitor and projected into the eyepiece of the daysight. Optimum boresight harmonization between both missile tracking and sighting channels is ensured by projection of reference marks into each optical sensor path from a common multispectral projector. MILAN ADT is compatible with all existing MILAN missile versions and with MIRA and MILIS TIs;the integrated TI is offered as an option. A planned future range increase of the MILAN weapon system will also be discussed in brief.

关键词： Electrooptical devices

来源：评论

学校读者我要写书评

暂无评论

MOEMS for environmental applications: Real - Lime air pollution monitoring system using chemo-optical sensor

MOEMS for environmental applications: Real - Lime air pollut...

引用

advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies ii

作者： Caldararu, Mira Vasile, A. Craciunoiu, F. Cristea, Dana Paraschiv, Anca Caldararu, F. ECOSEN Ltd. Bucharest Romania Politechnica University Bucharest Institute of Microtechnology Bucharest Marathon Laboratories Ltd. Bucharest Ecological University Bucharest ECOSEN Ltd. Str. St. Mihaileanu nr. 38 s. 2 Bucharest Romania Politechmca University Splaiul Ind. 290 Sect.6 Bucharest

Air pollution monitoring needs real-time measurement systems for low pollutant concentration levels. The authors have designed and manufactured an experimental integrated chemo-optical sensor on silicon containing a sol-gel layer, a silicon nitride waveguide and a silicon photodiode. This sensor was included in a measurement system, which has its own microcontroller for data acquisition and an autonomous power supply. The measured data are calculated and managed when the microcontroller is serially connected to the computer, dedicated software being performed. In this way, the "classical" laboratory equipment for air pollution measurements can be replaced by an autonomous real-time measurement system.

关键词： Microelectromechanical devices

来源：评论

学校读者我要写书评

暂无评论

EMC problems in microelectronic sensor packaging

EMC problems in microelectronic sensor packaging

引用

Conference on Micro- and Nanotechnology - Materials , Processes, Packaging, and systems ii

作者： Gandelli, A Grimaccia, F Mussetta, M Zich, RE Politecn Milan Dipartimento Elettrotecn I-20133 Milan Italy

ISBN: (纸本)0819456101

Microelectronics for environmental monitoring (microsensors, etc.) present a variety of power supply voltages and operative frequencies from one side and are subject to interference and noise from the external environment on the other. All these aspects lead accuracy and reliability of those circuits devoted to physical measurements a difficult compromise for the designer. sensors implemented in the newest generation of networks are realized by integrating advanced analog features with digital processing capabilities. The analog blocks, above all, where the processing related to the signal provided by the active element is performed, show in the most substantial way this problem related to EMC inadequacy. In order to restore the top-quality features it is necessary to arrange the best shielding design for the blocks more influenced by interference and noise. So the work of the designer leads to the analysis, simulation and realization of localized and global shields inside and on the packaging. The problem related to the definition of EMC role in designing such shields is very substantial for environmental applications, where performance leads to improve and optimize the traditional designing techniques. The proposal and consequent application of general criteria devoted to define specific needs for shielding is the first step of a logical development oriented to the mature industrial production of efficient and reliable devices able to maintain their performance independently by the influence of external and internal noise.

关键词： microsensors external and internal noise EMC top-quality shielding design

来源：评论

学校读者我要写书评

暂无评论

Coordination polymers with cyanoaurate building blocks: Potential new industrial applications for gold

引用

GOLD BULLETIN 2005年第2期38卷 47-54页

作者： Leznoff, DB Lefebvre, J Simon Fraser Univ Dept Chem Burnaby BC V5A 1S6 Canada

This report illustrates the concept that aurophilic interactions of gold-containing building blocks, particularly cyanoaurates, could be used as a toot to increase structural dimensionality in systems containing other metals in addition to gold(l). Such high-dimensionality systems may have useful optical, magnetic, conducting or porous materials properties. Recent successes from our group and others in using the neglected, luminescent [Au(CN)(2)](-) building block to synthesize supramolecular coordination polymers with interesting and potentially commercially applicable physical properties will be surveyed. In most heterometallic [Au(CN)(2)]-based polymers, aurophilic interactions increase the structural dimensionality of the system and can impart increased thermal stability. The gold(l) ion can mediate significant magnetic interactions between transition-metal centres or influence iron(ii) spin-transition behaviour in the polymers. The Cu[Au(CN)(2)](2)(solvent)(x) polymer system is dynamically vapochromic, i.e., it shows large, reversible colour changes upon exposure to solvent vapours, thereby illustrating a sensor-type application. The related d(8), square-planer [Au(CN)(4)](-) building block, which has only recently been incorporated into coordination polymers, does not form any aurophilic interactions;weak Au-N(cyano) interactions control the intermolecular packing. Several structural examples of cyanoaurate-based coordination polymers are presented, including 2-D and 3-D arrays. The incorporation of cyanoaurates as components of advanced materials would provide a new utility and market for these key compounds of the gold mining and refining industry.

关键词： .reversible thereby supramolecular coordination polymers luminescent Vapours GOLD-CONTAINING Building Blocks aurophilic interactions structural dimensionality cyanoaurates colour changes

来源：评论

学校读者我要写书评

暂无评论

Characterisation of novel refractometric sensing systems

Characterisation of novel refractometric sensing systems

引用

advanced Environmental, Chemical, and Biological Sensing Technologies iiI

作者： Copperwhite, Robert Town, Graham Kribich, Kada-Raphael Oubaha, Mohamed Hradil, Jan Barry, Henry Kent, Nigel O'Dwyer, Kieran MacCraith, Brian D. National Centre for Sensor Research School of Physical Sciences Dublin City University Dublin 9 Ireland Department of Electronics Macquarie University NSW 2109 Sydney Australia Centre d'Electronique et de Microoptoelectronique de Montpellier Université du Montpellier II place Eugène Bataillon 34095 Montpellier France

Simulations and experimental results for novel refractometric-sensing platforms are presented here. The first platform is based on a multi-mode interference coupler (MMIC) in which the top and sidewalls of the coupler are exposed to a humidity-sensing enrichment layer. sensor operation is based on the creation of self-images of the input field into the coupler, at regular intervals along the coupler. This phenomenon is due to interference between the optical modes in MMICs. Changes in the refractive index of the sensing layer cause predictable shifts in the position of the output image, which in turn affects the amount of light coupled into the output waveguide. Sensitivity enhancement has been demonstrated by fabricating longer MMICs capturing higher-ranking self-images, which are shifted more than the first self-image. Consequently, more significant changes in the amount of light coupled to the output are observed for a given refractive index change. The second platform demonstrated is a Multi-Channel Directional Coupler sensor (MCDC). It differs from the MMIC in that the sensing region now consists of multiple single-mode waveguides, which are in close enough proximity to allow light to transfer between the waveguides. Sensitivity dependance on platform length has been investigated and compared with that of the MMIC. The devices have been fabricated by the direct laser writing process on UV curable hybrid sol-gel materials. Such materials allow implementation of planar technology enabling integration on a silicon substrate. Future applications of these platforms include chemical and bio-chemical sensing is the areas of process, environmental and bio-diagnostic monitoring.

关键词： sensors

来源：评论

学校读者我要写书评

暂无评论

Design and implementation of high-performance and cost-effective white-light interferometric profile measurement systems

Design and implementation of high-performance and cost-effec...

引用

advanced Characterization Techniques for Optics, Semiconductors, and Nanotechnologies ii

作者： Chang, Gao-Wei Lin, Yu-Hsuan Kuan, Chi-Cheng Department of Mechatronic Technology National Taiwan Normal University Taipei Taiwan Department of Instrustrial Eduation National Taiwan Normal University Taipei Taiwan

White light interferometry (WLI) has played an important role in nano- and micro-scale profile measurement technology. To meet the demand of high-accuracy, high-repeatability, and cost-effective measurement, the research activities on WLI and its applications are rapidly in progress. WLI is based on the superposition of waves with different but very close wavelengths to produce beat phenomena (or to generate detectable envelopes in the interferogram) and then to identify the locations of the zero-order interference fringes (or those of the maximum intensities of interference fringes without the optical path difference). The locations reflect the information of three dimensional (3D) surface profiles from the consecutively acquired images in a WLI system. The objective of this paper is to develop a high-accuracy and cost-effective WLI measurement system, especially for the surfaces of micro-mechatronic devices, micro-optical components, semiconductor devices, etc. In our approach, the feasibility of the use of spectral coherence properties to meet the system design requirement is first investigated. Specifically, proper spectral filters are employed to enhance the coherence length of the light source (i.e., that of the filtered light source) to an order of ten micrometers. Then, a Young's double-slit interference experiment with filtered and unfiltered white light sources is conducted to demonstrate the effectiveness of this technique. Also, we adopt a Michelson interferometric configuration as the optical module of the proposed WLI system, for the sake of its simplicity. Experimental results indicate that several inexpensive spectral filters, a lower-grade charge-couple-device (CCD) image sensor, and a PZT (piezoelectric transducer) with a lower movement resolution are merely needed to develop the WLI system, instead of the use of higher-grade optical and optomechanical components. It turns out that the proposed system with high-accuracy measurement performance is m

关键词： Interferometry

来源：评论

学校读者我要写书评

暂无评论

SmartLife: A point of intelligence for wireless sensor networks in ubiquitous environment

SmartLife: A point of intelligence for wireless sensor netwo...

引用

作者： Haq, Anwar Ryerson University (Canada)

学位级别：M.Eng.

As home becomes more technologically advanced nowadays people not only need to protect their homes and families from theft or fire, but from carbon monoxide, excessive heat or low temperatures, flooding as well as monitoring their loved ones while they are away. In this research Project, we present the design case for an intelligent embedded system (Hardware and Softwaxe) called "SmartLife". We build a working prototype for SmartLife which is made up of tiny sensors, mobile devices, appliances and personal computers from diverse sources. Considering diversity in smart home environment the architecture must be open and flexible to embrace a variety of entities without any special favor towards particular participants or target domains. SmartLife will be the point of intelligence in the smart home environment (complete pervasive environment) which not only communicates with wireless sensors network (monitor & control) but also provides a secure state of mind to elderly homeowners. The work introduces the basics of uClinux kernel as well as the differences between uClinux and the general purpose operating system Linux. It also introduces FPGA based soft-core CPU NIOS-ii as an embedded platform for our research project. Our uClinux based architecture provides an integrated and comprehensive framework for building pervasive applications. We describe the design and implementation of our architecture as well as building SmartLife application within it. Keywords. NIOS-ii, FPGA, Embedded systems, RTOS, Microprocessor, uClinux, Micro controller, Ubiquitous & Pervasive Computing.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Fabrication and design of an auto ventilation controller using micro gas sensor for the clean room/building environment

Fabrication and design of an auto ventilation controller usi...

引用

IEEE sensorS

作者： ii Jin Kim Sang Do Han Hi Dock Lee Jin Suk Wang Department of Electronics Engineering Chungnam National University Daejeon South Korea Sensors and Advanced Materials Laboratory Korea Institute of Energy and Research Daejeon South Korea

With the growing attention to environmental problems and the increase of standard of living, there are imperative needs for gas sensors with high sensitivity and excellent selectivity in air quality monitoring. Domestic environmental monitoring is an important aspect nowadays. We have tried to develop a sensor that can help to monitor the presence of harmful gases. An auto ventilation controller has been developed to expel out the toxic gases (CO, NO 2 , CH 4 , HCHO, C 3 H 8 , CO 2 ) from the residential rooms/buildings. It is developed to save energy and to clean the environment. For this, microelectronic semiconductor type gas sensor was made by MEMS (microelectromechanical system) technology and a control electronic circuit was designed. The potential of the controller was further systematically studied for its sensing characteristics against various toxic gases. It has been observed that sensor is effective in detecting few gases even up to very small concentration levels. The developed sensor is inexpensive, has small size, sufficient sensitivity and immunity to environmental conditions for applications. The functioning and use of the sensor is very simple and reliable

关键词： Fabrication Ventilation Gas detectors Buildings Gases Monitoring sensor phenomena and characterization Control systems Environmental factors Microelectronics

来源：评论

学校读者我要写书评

暂无评论

Laboratory testing of components and systems used for advanced wavefront control

Laboratory testing of components and systems used for advanc...

引用

Conference on advanced Wavefront Control - Methods, Devices and applications ii

作者： Giles, MK Wendelstein, N Kohnle, A Weiss, R New Mexico State Univ Klipsch Sch Elect & Comp Engn Las Cruces NM 88003 USA

ISBN: (纸本)0819454915

As advanced wavefront control components and systems are developed, they must be tested. This paper describes the methodology and hardware used in the laboratory at FGAN-FOM, The Research Institute for Optronics and Pattern Recognition in Germany, to evaluate components and systems to be used for wavefront control. The test bed described is unique in two ways: (1) it uses a Hamamatsu parallel aligned liquid crystal phase modulator as a pupil plane phase screen to generate degraded input wavefronts for testing the wavefront control systems, and (2) it may be used to evaluate a variety of wavefront sensor, corrector, and control elements without changing the layout or realigning the optical components that comprise the basic test bed. For example, once the test bed is assembled and aligned, a desired wavefront sensor, with its matching telecentric pupil-imaging lens pair, is simply inserted at the end of the beam train, aligned with the test bed output beam, calibrated, and tested. Similarly, a desired wavefront corrector is inserted at the appropriate pupil plane, aligned, and tested. The paper also presents typical test results.

关键词： wavefront sensor wavefront control

来源：评论

学校读者我要写书评

暂无评论

Design and manufacture of a large aperture wavefront sensor

Design and manufacture of a large aperture wavefront sensor

引用

Conference on advanced Wavefront Control - Methods, Devices and applications ii

作者： Hutchin, R Otto, O Wertheimer, A Opt Phys Co Calabasas CA 91302 USA

ISBN: (纸本)0819454915

A compact, low-cost wavefront sensor has been demonstrated to measure dynamic disturbances in 1-3 m diameter optical systems. With 448 subapertures and 4 KHz frame rate, it can measure disturbances up to 2 KHz at a level of 1/3800 waves rms at 0.65 mum. It also has a linear dynamic range of 3 x 10(6):1 for ease of alignment. The principles of operation and test data are presented for the subaperture sensors (called NanoTrackers), which are lateral shearing interferometers capable of measuring tilt to 1.7 nanoradians rms at 8 muW of input power as well as phasing for segmented optical systems to 75 picometers rms (at 4 KHz).

关键词： wavefront sensor large aperture high accuracy low cost

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：