基于红外热像仪的涂层波段发射率测量

简要介绍了红外热像仪测量涂层发射率的原理,详细介绍了基于红外热像仪的涂层波段发射率测量装置设计与测试方法,实际测试发射率0.708～0.920之间的4个标准样品,误差均不大于2.06%.     

基于红外热像仪的海上油田安防系统设计

海上油田安防系统中的红外热像仪在有雾天气及夜间都可以对海底管缆区域进行有效的监视,具有全天候监视的优势.对基于红外热像仪的海上油田安防系统进行了设计,给出了系统的设备组成.分别对单个红外热像仪系统和红外热像仪与AIS相结合的联合系统进行了设计,并对联合系统的显控软件进行了设计.     

某型红外热像仪结构改进设计研究

红外热像仪机械环境可靠性是其结构设计最为重要的指标之一.为保证红外热像仪能够经受服役的振动环境,本文以某型红外热像仪故障闭环为契机开展失效机理及结构改进设计研究.基于动态试验结果对红外热像仪有限元模型进行修正.采用有限元数值方法和随机振动疲劳失效理论相结合对故障的产生机理进行了推测.根据分析结果重新对结构改进优化并通过...     

混凝土结构物与植物叶片之红外热像侦测研究

红外热像仪准确量测温度的主要关键为物质的发射率.红外热像仪常用于战区侦测,但战区目标物常以植物绿化达到伪装效果.为此基于能量平衡法则,建立叶片发射率仿真模型,可用以估算叶片发射率.另外以红外热像仪分析±0.5℃微小温差环境中混凝土结构物与植物叶片之红外热影像,实验结果显示两种目标物红外热像平均温度与红外热像仪发射率参数设定值的回归直线相当接近,但两种目标物平均温度标准误差与红外热像仪发射率参数设定值的回归直线明显不同.混凝土与叶片具有不同的红外热像性质,此一发现将有助于提升红外热像仪对微小温差目标区的侦测能力.     

一种长焦大变倍连续变焦光机组件结构设计及装调

介绍了一种基于长焦大变倍比连续变焦红外热像仪的结构设计及装调方法。可用于各类红外热像仪的变焦结构设计中,在保证图像清晰的前提下,能够明显改善连续变焦过程中的光轴晃动,提高红外热像仪的光轴一致性和光轴稳定性,控制焦距精度,降低红外热像仪装调难度。该结构采用双导轨配合步进电机组件化设计,相对于其他变焦结构的设计,该结构变焦过程中光轴一致性好,光轴晃动量小,通用性强。     

红外热像测温技术及其应用研究

阐述红外热像测温技术的工作原理和红外热像仪的基本组成,综述了红外热像仪测温技术的发展,从技术层面剖析了红外热像仪测温存在的问题,介绍了国内外在红外热像测温技术方面的研究热点,例举了利用红外热像仪进行温度场测量的应用实例,同时展望了未来的发展方向.针对红外测温领域中的理论、仪器及应用进行了较为详细的分析和总结.     

红外热像仪网络远程升级功能的设计与实现

为了降低红外热像仪安装后的系统维护成本,提出了一种基于TCP/IP网络的红外热像仪远程在线升级功能的实现方案。该方案针对基于ARM平台设计的带网络接口的红外热像仪,具体包括PC机上的客服端程序和ARM平台的更新脚本和服务程序。通过客服端程序把升级软件发送到ARM的服务端,再通过更新脚本重新烧写到NANDFLASH,从而...     

基于NIOS II的红外热像仪系统通讯数据处理研究

针对红外热像仪系统的通讯数据处理模块,详细描述了一种基于NIOS II软核处理器的红外热像仪系统通讯数据处理设计方案,该方案运用SOPC进行硬件设计并通过标准C语言实现通讯数据处理,最后通过Altera公司的EP38SL150F1152I3芯片,对方案进行硬件实施和验证,证明提出的方案可以快速有效地实现红外热像仪系统通讯数据的处理和分类。     

高可靠性红外热像仪的设计方法

主要研究了红外热像仪可靠性的设计技术。分析了红外热像仪的常见故障,建立了红外热像仪典型的可靠性模型。理论分析了可靠性的主要限制因素及其影响程度,提出了高可靠性红外热像仪的设计方法,并给出了试验验证结果。最后对比介绍了国内外典型红外热像仪可靠性的增长情况。     

锑化铟红外热像仪测温的大气修正计算

基于红外辐射理论,推导出了红外热像仪测温的基本公式;根据锑化铟的光谱响应度,计算出了锑化铟红外探测器的响应电流与被测物体真实温度的数值关系;进一步的计算出了在大距离上大气传输导致的红外热像仪的测温相对误差值.     

基于FPGA的二值忆阻器仿真器研究及应用

基于FPGA的可重构性,提出了一种基于数字电路的二值忆阻器仿真器。与模拟电路忆阻器仿真器相比,所提出基于数字电路的忆阻器仿真器易于重新配置,与它所基于的数学模型表现出很好的匹配性,符合忆阻器仿真器所有要求的特点。实现了基于该仿真器的与门、或门、加法器及三人表决器。使用Altera Quartus II和ModelSim工具对仿真器功能和基于该仿真器实现的逻辑电路进行验证。给出所有设计电路的原理图、仿真结果和FPGA资源消耗。仿真结果表明,该二值忆阻器仿真器相比其他数字电路忆阻器仿真器具有更少的硬件资源消耗,更适合用于大规模忆阻器阵列研究。     

Polarization-mode-dispersion emulator using variable differential-Group-delay (DGD) elements and its use for experimental importance sampling

We demonstrate a practical polarization-mode-dispersion (PMD) emulator using programmable differential-group-delay (DGD) elements. The output PMD statistics of the emulator can be chosen by varying the average of the Maxwellian DGD distribution applied to each element. The emulator exhibits good stability and repeatability in a laboratory environment. In addition, we demonstrate how this emulator may be used to experimentally employ the powerful technique of importance sampling to quickly generate extremely low probability events. This technique is used to measure the Q-factor degradation due to both average and rare PMD values in a 10-Gb/s transmission system.     

A scalable and reusable emulator for evaluating the performance ofSS7 networks

A scalable and reusable emulator was designed and implemented for studying the behavior of SS7 networks. The emulator design was largely based on public domain software. It was developed on top of an environment supported by PVM, the Parallel Virtual Machine, and managed by OSIMIS-the OSI Management Information Service platform. The emulator runs on top of a commercially available ATM LAN interconnecting engineering workstations. As a case study for evaluating the emulator, the behavior of the Singapore National SS7 Network under fault and unbalanced loading conditions was investigated     

Statistical PMD emulator using variable DGD elements

We report on a novel polarization-mode dispersion (PMD) emulator with exact Maxwellian statistics. The proposed PMD emulator was implemented by using variable differential group-delay elements and polarization controllers. Unlike the previous PMD emulators, the proposed PMD emulator could generate not only the first-order PMD with exact Maxwellian distribution, but also the second-order PMD.     

A dynamical polarization mode dispersion emulator

A polarization mode dispersion (PMD) emulator is presented which accurately follows the dynamics of PMD in field optical fiber. A modification on a dynamic mode coupling wave-plate model is presented to model the emulator. It is found that the emulator and model can accurately describe the dynamical behavior of the state of polarization and thus PMD in a field fiber. The emulator is shown to be repeatable. Generally, the dynamical PMD emulator is shown to cause more realistic bit-error-rate degradation than a classical PMD emulator.     

基于板载仿真器的MSP430F5529 LaunchPad开发

本文针对目前单片机学习和开发过程中,在线仿真困难且实验装置不易扩展的情况,研制了基于TI公司板载仿真器的MSP430F5529LaunchPad.该LaunchPad的硬件包括板载仿真器、MSP430F5529单片机最小系统、USB通信接口电路及BoosterPack接口等.软件包括基本的CCS操作、USB通信控制实验和GPIO输出控制实验程序以及各类中断控制程序实验.实验表明,该LaunchPad软硬件资源丰富、易于扩展且成本较低.     

A low‐cost photovoltaic emulator for static and dynamic evaluation of photovoltaic power converters and facilities

In testing maximum power point tracking (MPPT) algorithms running on electronic power converters for photovoltaic (PV) applications, either a PV energy source (PV module or PV array) or a PV emulator is required. With a PV emulator, it is possible to control the testing conditions with accuracy so that it is the preferred option. The PV source is modeled as a current source; thus, the emulator has to work as a current source dependent on its output voltage. The proposed emulator is a buck converter with an average current mode control loop, which allows testing the static and dynamic performance of PV facilities up to 3 kW. To validate the concept, the emulator is used to evaluate the MPPT algorithm of a 230‐W experimental microinverter working from a single PV module. Copyright © 2012 John Wiley & Sons, Ltd.     

偏振模色散模拟器产生二阶PMD的理论研究

对基于保偏光纤（PMF）级联的偏振模色散模拟器（PMD emulator)产生的二阶PMD进行了数值模拟，结果表明，采用偏振控制器（PC）连接明显优于可旋转连接器（FC）连接，当级联段数N＝8时，PC连接的模拟器产生的二阶PMD与理论曲线基本符合；PMF的长度对PMD模拟器模拟二阶PMD并没有明显影响。     

Electrically controllable all-fiber PMD emulator using a compact array of thin-film microheaters

An electrically controllable, all-fiber polarization-mode dispersion (PMD) emulator is constructed using thin-film microheaters to temperature tune the birefringence of 30 PM-fiber sections spliced at 45/spl deg/ angles. Compact packaging is achieved by mounting the fiber heaters onto an array of silicon V-grooves. The advantages of this electrically tunable emulator design are low loss, negligible PDL, simple construction, no internal reflections, and no moving parts.     

一种新的低副瓣多波束形成方法

利用遗传算法优化一维线阵电流幅值的结果,结合单波束形成原理以及叠加原理最终成功实现了一维、二维、三维天线阵的超低副瓣多波束的形成问题。通过matlab编程仿真,结果显示设计效果非常好,波束方向,波束相对大小要求均能很好控制。该文对多波束天线的设计具有重要的指导作用。