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关键词： 传感器技术   课程   教学方法  

摘要： 针对学生反映的传感器技术课程的涉及面广,抽象及难以理解的情况,分析了传感器技术课程的特点,探索新的教学方法,在课堂中采用仿真软件进行模拟实验,从而增加了学生的学习兴趣,提高了教学效果。

关键词： 化学毒剂   探测仪   离子迁移谱技术   传感器技术   改进型   灵敏度  

摘要： 美国Rae系统公司研制的ChemRae化学毒剂探测仪（见图1）运用了下一代传感器技术——开环离子迁移谱技术（IMS）的新型探测仪。ChemRae采用了改进型离手迁移室，从而提高了选择性和灵敏度。

关键词： 煤矿   粉尘浓度   传感器技术   单片机控制技术   监测系统   可视化  

摘要： 为了实现煤矿监控监测系统的高性能运行,提高粉尘监测的可靠性,提出了基于凌阳16位单片机SPMC75F2413A的粉尘在线监测方案。以单片机为核心结合光电传感器设计出了粉尘在线监测系统,给出了粉尘监测及报警器的硬件和软件的实现方案与电路结构。该系统能长时间实时监测粉尘浓度,直接输出粉尘质量浓度值,并通过CAN总线接口实现系统的远距离、高可靠性通信功能和远程监控功能,做到在无人监测时故障信息及时通知监测人员。该系统成功应用到蒋庄煤矿井下,当粉尘浓度超限时就会声光报警,具有测量快速准确、性能稳定等优点。

关键词： 炮兵   数据采集   PC机   传感器技术  

摘要： 当前，随着新军事变革在全世界范围内的不断推进，用高技术升级武器装备和对传统武器进行升级改造，是提升部队作战能力中重要方面。研究设计一种可以实现炮兵射击环境信息自动采集与处理的数据采集系统有重要的现实意义和应用价值。\n 论文基于PC机设计了一种炮兵射击环境信息数据处理系统的硬件、软件系统。论文分析了现代化战争中炮兵的地位和作用，指出炮兵部队装备的发展方向是数字化和自动化。为适应这一发展趋势，数字化火炮和炮兵射击指挥自动化系统首先要解决战场环境中相关信息的自动采集和数字化处理等问题。论文阐述了数据采集系统硬件系统的总体说明和构成，着重介绍了PCL-816卡的功能、特性、安装和设置过程，分析了数据采集系统的传感器的选择，应用PCL-816数据采集卡和传感器技术，对如何实现战场环境信息(气温、药温、气压)的自动采集作了详细的探讨，系统包括硬件系统、软件系统设计和传感器的选择等。\n 论文设计的系统可为射击指挥员提供科学可靠的数据，使操作人员从传统、繁琐、重复的测量和数据处理事务中解脱出来，进一步提高炮兵射击准备的速度和射击诸元的精度。

关键词： Biosensor   DNA   Nucleic acid hybridization   Electrochemical DNA biosensor   Polymer   Nanoparticle   Magnetic particle   Carbon nanotube  

摘要： Electrochemical biosensors have a key importance in many areas including clinical, biological, pharmaceutical, forensic, environmental and agricultural applications. They have the advantages of rapid, easy and low cost preparation allowing the localization of biocompound on electrodes of any size with independence of sample turbidity, high sensitivity and high selectivity. Electrochemical devices have attracted considerable interest in the development of DNA hybridization biosensors. They rely on the conversion of hybridization event into a direct electrochemical signal. Many efforts have been carried out in the detection of DNA hybridization for improving the stability, reproducibility and sensitivity. This review summarizes the advanced electrochemical methodologies involved in nucleic acid hybridization performed by using polymer technology, nanoparticles (NPs), magnetic particles, and carbon nanotubes (CNTs). The preparation of polymer modified electrodes especially including conducting polymers and their applications for DNA hybridization are given with the advantages of electrocatalysis, good electroactivity, high sensitivity and providing suitable matrix for DNA immobilization. The role of various nanomaterials in biosensors with the advantages of high surface area, fast heterogeneous electron transfer, excellent biocompatibility and enhanced signal with a good selectivity are presented. The combination of these techniques is also discussed in details.

关键词： Cavity sensor technology (CST)   Moulding process control   Online dimensions control   Pharmaceutical device   Multivariate data analysis   Design of experiment  

摘要： There is an increased demand within the moulding industry to improve the quality of moulded parts by maintaining consistent tolerances and overall dimensions. This interest is more important in areas of the moulding industry that are dedicated to pharmaceutical devices, where a quality by design approach is now expected to be adopted. A pharmaceutical device is an assembly of different plastic components which are manufactured by injection moulding;many have critical quality parameters which affect not only the device appearance but also more importantly its performance for drug delivery. Hence, the need of better understanding and control of injection moulding processes. This study presents the use of multivariate regression modeling approach to monitor the quality of the final product using cavity sensor technology (CST). The influence of the injection moulding process parameters on the quality of the final parts have been investigated using a design of experiment approach. The results demonstrate that the Partial Least Squares (PLS) regression model based on cavity pressure sensor data could be successfully used to monitor the quality (weight, dimensions) of the final product in plastic injection moulding. Crown Copyright (C) 2010 Published by Elsevier Ltd. All rights reserved.

关键词： SPR biosensor   fragment library   fragment screening   interaction analysis   enzyme  

摘要： A new fragment library for lead discovery has been designed and experimentally validated for use in surface plasmon resonance (SPR) biosensor-based screening. The 930 compounds in the library were selected from 4.6 million commercially available compounds using a series of physicochemical and medicinal chemistry filters. They were screened against 3 prototypical drug targets: HIV-1 protease, thrombin and carbonic anhydrase, and a nontarget: human serum albumin. Compound solubility was not a problem under the conditions used for screening. The high sensitivity of the sensor surfaces allowed the detection of interactions for 35% to 97% of the fragments, depending on the target protein. None of the fragments was promiscuous (i.e., interacted with a stoichiometry >= 5: 1 with all 4 proteins), and only 2 compounds dissociated slowly from all 4 proteins. The use of several targets proved valuable since several compounds would have been disqualified from the library on the grounds of promiscuity if fewer target proteins had been used. The experimental procedure allowed an efficient evaluation and exploration of the new fragment library and confirmed that the new library is suitable for SPR biosensor-based screening. (Journal of Biomolecular Screening 2011:15-25)

关键词： 面贴式永磁同步电机   无位置传感器控制   矢量控制   脉动高频电压注入法  

摘要： 随着电力电子技术和电机控制技术的发展,永磁同步电机在交流传动领域得到了广泛的应用。永磁同步电机的控制需要准确获知转子位置和速度,为此而安装的机械式传感器不仅增加了系统的成本和复杂性,而且降低了系统的可靠性。为了解决该问题,无位置传感器技术应运而生,成为电机控制领域的研究热点。 低速无位置传感器控制是实现全速度范围无位置传感器控制的关键,引起了国内外学者的广泛关注。本文主要研究面贴式永磁同步电机低速无位置传感器控制的基本原理和实现方法,采用脉动高频电压注入法进行转子位置和速度估算,实现从起动到低速运行的无位置传感器控制。 本文首先分析了永磁同步电机的数学模型以及矢量控制的基本原理,选取了id=0的电流控制策略,并搭建了永磁同步电机矢量控制系统的仿真模型,仿真结果验证了矢量控制系统良好的性能;其次研究了面贴式永磁同步电机的饱和凸极特性以及脉动高频电压注入法的基本原理,给出了初始位置估算和低速无位置传感器运行两个阶段的具体实现方案,并搭建了面贴式永磁同步电机无位置传感器控制系统的仿真模型,仿真结果验证了该方案的可行性;然后介绍了基于TMS320LF2407A DSP和PS21865 IPM的硬件平台,并给出了软件设计的思路和流程;最后针对一台800W面贴式永磁同步电机进行了实验研究,包括起动和低速运行两个阶段,实验结果表明该无位置传感器控制方法能较为有效地实现位置估算,具有一定的实用性。

关键词： 智能电网   光纤电流传感器   法拉第效应   光伏电池   半导体工艺  

摘要： 测量设备在智能电网中占有非常重要的地位,电网中需要实时并且精确的测量高压线路的电流和电压值。有源型光纤电流传感器利用电磁感应原理,测量高压电路的电流值。近年来,它凭借成熟的传统互感器原理和先进的光纤通信技术已经逐步市场化。现在无源型光纤电流传感器也引起人们的重视。它利用法拉第电磁感应原理,在高压侧引入磁光介质的传感头感应电流产生的磁场,间接得到电流值。无源型光纤电流传感器是电流传感器发展的终极方向。 本论文首先阐述了基于智能电网的光纤电流传感器的分类和发展现状,之后利用琼斯矩阵理论分析了基于磁光晶体钇铁石榴石(YIG)的光纤电流传感器系统,说明了在光纤电流传感器中加聚磁环的作用。并在此基础上提出两种基于磁光晶体的光纤电流传感器的传感头的设计方案。制作并测试了其中一种传感头,说明此传感头对于测量高压电流有效果,但是由于自身材料特性的限制,测量的范围不够大,所以目前用于实际的高压电力系统中还有一定困难。 由于磁光晶体光纤电流传感器的缺陷,本论文又利用琼斯矩阵理论分析了全光纤电流传感器,提出一种反射式的全光纤电流传感器系统的结构,并且实际制作和测量了该系统。全光纤电流传感器能用来测量高压电流,尤其采用扭曲缠绕光钎传感头的方法抑制光纤线双折射。为今后更进一步研究全光纤电流传感器奠定一些基础。 本论文还系统研究了用于有源型光纤电流传感器中的光伏能量转换器,它实际上是一种单结光伏电池。不仅理论分析了光伏电池的基本原理,而且给出了光伏能量转换器的外延层结构和半导体器件的结构。在此基础上,详细说明了该转换器的工艺制作过程,并测试了制作的样品,在输入光功率为200mW时,光电转换效率达到20.7%。 最后,本论文提出一种聚光的色散型光伏太阳能电池的系统设计。它的主要思想是将广谱太阳光色散成多个窄谱,然后利用对不同波长敏感的单结光伏电池来吸收。因为单结电池制作简单,而且容易针对特定波段进行优化,所以这个方案很有前景。

关键词： 教材   高等学校   传感器  

ISBN: (数字)9787302272236 ISBN: (纸本)9787302272236

摘要： 本书系统地介绍了传感器的技术基础以及各类传感器的原理、特性和应用。