光纤温度传感器的研究和应用

分析了光纤温度传感器在温度探测中的优势,综述了光纤温度传感器的发展现状和应用.分别介绍了分布式光纤温度传感器、光纤光栅温度传感器、干涉型光纤温度传感器、光纤荧光温度传感器和基于弯曲损耗的光纤温度传感器的工作原理和研究现状,详细介绍了各种传感器的特点及各自的研究方向.     

基于光纤的温度传感器

简单介绍了光纤温度传感器的原理及分类,并分别介绍了光纤Fabry-perot干涉型温度传感器、半导体吸收型光纤温度传感器、光纤光栅温度传感器的工作原理及最近几年来的研究现状,阐述了各种温度传感器的机理、实验装置和研究结果,最后对其进行了对比分析.     

自动气象站温度传感器在现场检定中电磁干扰源的探讨

简要介绍了自动气象站温度传感器的测温原理;分析了自动气象站温度传感器常见的电磁干扰来源,以及温度传感器在现场检定过程可能产生的电磁干扰和对检定工作造成的误差和影响,并提出了增加滤波、正确接地及改变检定方式等应对措施.     

温度传感器和流量传感器结构与检修方法分析

对水温表热敏电阻式传感器、空调蒸发器出风口温度传感器、石蜡式气体温度传感器、双金属片式气体温度传感器、热敏铁氧体温度传感器、叶片式空气流量传感器以及测量芯式空气流量传感器的结构、原理与检修进行了讨论。     

电子设计工程师认证实操实训基础系列讲座(15) 第六讲 简易温度监控器设计(续)

五、温度采集及调理电路设计与仿真测温离不开温度传感器.常见的温度传感器有热电偶、热电阻、模拟集成电路温度传感器、数字温度传感器等多种类型.为方便在Proteus中仿真观测结果,我们采用LM35温度器作为温度采集器件.LM35是美国国家半导体公司(现被美国德州仪器公司收购)生产的集成电路温度传感器,它具有很高的工作精度和...     

一种大量程低误差CMOS温度传感器

温度传感器是将温度信号转换为电信号的元件。CMOS工艺制作的温度传感器具有面积小、成本低的优点,精度和工作温度范围是CMOS温度传感器最重要的两个指标。设计了一种工作温度范围为－45 ℃~125 ℃,测量精度为±1.5 ℃的温度传感器,主要包括温度传感电路和后端Σ-Δ ADC两部分,设计时采用了曲率校正、动态匹配等多重误差的校正方法。     

基于夹层结构的抗应变干扰柔性温度传感器的性能研究

针对柔性温度传感器测温过程中因压敏导电机理引起的测量误差，提出了一种夹层结构抗应变干扰柔性温度传感器。首先通过热敏导电机理和压敏导电机理分析了柔性温度传感器在测温中产生测量误差的原因；其次设计了夹层结构，并通过光刻和溅射工艺实现夹层结构柔性温度传感器的制备；然后通过扫描电镜和能谱分析观察电极的制备状况；最终采用传感器TCR性能测试和传感器抗应变能力测试表征所设计的夹层柔性温度传感器的性能。实验结果表明，所设计的夹层结构柔性温度传感器的TCR为1.324%/℃,当传感器在不规则表面上测温时仍能保证良好的测试精度。该夹层结构柔性温度传感器在抗应变干扰方面表现出良好的潜力。     

一种具有±0.5℃精度的CMOS数字温度传感器

该文设计了一种基于0.35μm CMOS工艺的采用双极型晶体管作为感温元件的数字温度传感器.该温度传感器主要由正温度系数电流产生电路、负温度系数电流产生电路、一阶连续时间Σ-Δ调制器、计数器和I2C总线接口等模块组成.为提高温度传感器的测量精度,该文深入分析了在不采用校准技术的情况下工艺漂移对温度传感器精度的影响,并在...     

高精度无线温度传感器及其应用

介绍了一种基于高精度数字温度传感器LM92CM、单片机AT89C2051和集成无线收发芯片nRF403的无线温度传感器原理和应用.     

基于DS18B20温度传感器的数字温度计

详细介绍了一种基于51单片机和DS18B20数字温度传感器来进行温度测量的方法,包括温度传感器芯片的选取、单片机与温度传感器接口电路的设计,以及实现温度信息采集和数据传输的软件设计。DS18B20数字温度传感器是单总线器件,与51单片机组成一个测温系统,具有线路简单、体积小等特点,而且在一根通信线上,可以挂接很多这样的测温系统,十分方便。     

Effect of error-correcting code using DS-3 framing bits on measured dribble-error pattern of 565 Mbit/s fibre optic transmission system

22 days of error-second data were obtained from a DS-3 tributary of a 565 Mbit/s FOTS to predict the effect of a rate 0.99118 FEC code embedded in the DS-3 masterframe overhead. Using DS-3 masterframe parity to resolve errors within multiply-errored seconds, the code corrects all of the 1189 errors observed. There was no evidence for burstiness at the bit-by-bit timescale.<>     

京汉微波网管系统运行维护探讨

以同步数字体系（SDH,Synchronous Digital Hierarchy）数字微波设备网管系统功能为切入点,介绍了北京-武汉微波网管系统EMS的构成、网管接口之间的协议以及DCC通道、DCN组成,阐述了MS3201网管系统逻辑结构,重点分析了EMS和GNE、本地及远程操作终端、SMS之间的DCN通道组成以及微波网元之间、FOTS/MUX网元之间的协议组成。介绍了网管人员在日常运行维护中所遇到的问题如网元托管故障、微波设备故障、复接设备故障等,并提出与之对应的故障处理措施和方法,保障京汉微波设备的正常稳定运行。     

Hydrophilic polyurethane acrylate and its physical property for efficient fabrication of organic photovoltaic cells via stamping transfer

Recently, stamping transfer process using by soft mold or film has been considered by promising technology to solve the drawbacks of spin coating such as deposition of large area and specific region, reducing the material loss, and multi-staking device structures. For the previous researches, polyurethane acrylate (PUA) stamp was essentially treated the 1H, 1H, 2H, 2H-Perfluorooctyltrichlorosilane (FOTS) for self-assembled monolayer (SAM) onto the Si wafer to modify surface energy. Because the FOTS is known as corrosive material, it is necessary to develop the intrinsic property of PUA with environment friendly. In this research, we investigates non-FOTS based PUA stamping transfer and the different surface energy properties that result in various physical phenomena when used for organic photovoltaics. To transfer the material, the energy release rate (G) between the PUA and the coated material should be smaller than the G between the coated material and the substrate. As a result, hydrophilic PUA was used to reduce the interaction between the PUA and the organic bulk heterojunction (BHJ) layer to transfer the BHJ layer from the PUA stamp to a PEDOT:PSS-coated ITO-substrate. 2-Hydroxyethyl methacrylate (HEMA) is included as the reactive diluent to reduce the PUA viscosity, and the contact angle was measured to compare the surface property between the reference PUA and the HEMA-PUA. The stamping-transferred BHJ device exhibits a 95% relative efficiency (2.9%) when compared to that obtained when using a spin-coating process, which is considered as a good alternative to fabricate optoelectronic devices. More importantly, we have found a decrease in the fill factor (64%–58%) and a comparable performance (3.0%–2.9%) derived from the increase in the charge recombination and resistance during the stamping transfer.     

Fabrication of low-cost mold and nanoimprint lithography using polystyrene nanosphere

The periodic arrays of nanostructure were successfully patterned on Si wafers by ultraviolet nanoimprint lithography (UV-NIL) using nanosphere lithography (NSL). Two-dimensional (2D) well ordered self-assembled arrays were obtained on Si wafer by using nanosphere and the tilted-drain method. We tried to combine two techniques and hard mold of Si mold for NIL and polymer mold of acrylate-based polymer were fabricated by NSL. The Si master mold and polymer mold were formed by Cr lift-off and ICP-RIE process. The surface has a low surface energy at the interface with 1H, 1H, 2H, 2H-perfluorooctyl-trichlorosilane (FOTS) vapor-coating, which can eliminate the problem of the adherence to the surface of the mold during demolding. Finally, nanopatterns were formed by UV-NIL, where the residual layer was not observed.     

Fabrication and characterization of Co-Pt nanodot arrays by nanoimprint lithography and electrodeposition

Co-Pt nanodot arrays of 50 nm in diameter and 100 nm pitch were fabricated by nanoimprint lithography and electrodeposition process. A polymer mold used was replicated from a Si master mold with nanopatterns which were fabricated by EBL and ICP-RIE, where hydrophobic surface of these was achieved by FOTS coating. UV-NIL was successfully performed under pressures of 5 MPa for 5 min with an UV exposure time of 30 s, where the substrate was Ru (30 nm)/NiFe (10 nm)/Ta (5 nm)/Si (1 0 0). The size of patterns was measured at 53 nm in diameter, 25 nm in height, 100 nm in pitch. Finally, Co-Pt nanodot arrays were galvanostatically electrodeposited and characterized. The size and the composition of these arrays were measured to be 50 nm in diameter and 100 nm in pitch and Co-23.6 at.% Pt, respectively. According to MFM analysis, these arrays for the remnant states represent a single domain structure of perpendicular direction with a magnetic field, where a field of 15 kOe was applied perpendicular to the sample plane. These results show that for the Co-Pt dot arrays of 50 nm diameter perpendicular magnetic signal can be recorded and switched.     

单目图像序列光流三维重建技术研究综述

由单目图像序列光流重建物体或场景的三维运动与结构是计算机视觉、图像处理与模式识别等领域的重要研究内容,在机器人视觉、无人机导航、车辆辅助驾驶以及医学影像分析等方面具有重要的应用。本文首先从精度与鲁棒性等方面对单目图像序列光流计算及三维重建技术近年来取得的进展进行综述与分析。然后采用Middlebury测试图像序列对HS、LDOF、CLG-TV、SOF、AOFSCNN 和 Classic ＋NL 等典型光流算法以及 Adiv、RMROF、Sekkati 和DMDPOF等基于光流的间接与直接重建方法进行实验对比分析,指出各对比方法的优点与不足,归纳各类方法的性能特点与适用范围。最后对利用分数阶微分模型、非局部约束、立体视觉以及深度线索解决亮度突变、非刚性运动、运动遮挡与模糊情况下光流计算及重建模型的局限性与鲁棒性问题进行总结与展望。     

融合媒体云下的新网络构建

本文基于融合新闻生产制播平台业务需要,设计了融合媒体数据中心,对融合媒体云下的新网络构建进行了研究.通过应用云计算、IP集群存储等技术,将广电全台网完全架构在私有云上,突破了系统规模的限制,实现了通用硬件和专业软件的分离、办公生产一体化、融合生产全时化,提升了新闻生产效率、产能、共享能力.最后,对融合媒体数据中心在混合云、全台网演进、云安全、统一运维与监控等方面进行了分析.     

智慧党建在高校党员管理中的应用研究

以全国党员管理信息系统、学习强国、红星云、长沙智慧党建系统等信息化平台为例,旨在从智慧党建的概念和内涵着手,在现有平台基础上,通过创新切实地规划运用,探索构建涵盖基础信息、学习教育、组织活动、研讨交流、党群服务等五大功能组合的智慧党建应用体系,促使高校党建工作与教学管理、学生辅导、教师服务等工作有机融合,真正发挥高校党建工作的示范、带动、引领作用。     

联合作战密钥分发架构设计

以联合作战使命任务需求为牵引,基于作战网络模型,提出了密码信息网络和密码任务群组概念;作战网络的动态性导致了密码任务群组的不确定性,从而增大了密钥的生成与分发难度。利用复杂网络的邻接矩阵机理设计了密码任务群组的计算方法,并对密码态势认知、密码网络建模、密钥的生成和分发路径等关键环节进行了分析研究。结合信息化条件下联合作战指挥特点,设计了分发流程和架构,实现了密钥自动生成和灵活动态调整,解决了特定战斗任务之不确定性、多样性和复杂性带来的密钥分发难题。有效提高了密钥分发科学化和规范化水平,为密钥分发系统与指挥信息系统的深度融合、与作战系统和通信网络系统的自动协同筹划奠定了基础。     

产学研结合教育的理论问题及其在生物医学工程高等教育的实践

从产学研结合教育的基本原则、实施途径、教学形式、目标任务等方面对生物医学工程高等教育产学研结合人才培养模式进行探讨,阐述了我国生物医学工程高等教育产学研结合教育的基本内涵。实施缘由、适应范围、与常规教育模式的差异、基本状况,以及取得的教育教学效果和社会效果。