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目前,燃烧诊断技术正朝着五维(3D+t+λ)、多物理场、多组分和高时空分辨的方向发展。光学诊断技术如多光谱吸收层析技术、体激光诱导荧光技术、光场成像技术、快照式光谱成像等新技术不断被提出。新的数学方法如非线性层析、压缩感知和深度学习等层出不穷。这些新技术和新概念为诊断技术的发展带来了新的活力。本报告将主要介绍层析成像技术在燃烧诊断中的应用。同时,也将介绍深度学习等手段在层析反演及火焰三维形貌预测中的应用。最后报告将介绍基于层析原理的计算光谱成像技术及火焰五维成像技术的发展思路。
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报告将简要介绍微波层析成像基本原理、成像算法、数据采集系统的构成,并介绍微波层析成像在流态化颗粒制备过程,即颗粒包衣和干燥过程的应用。基于微波测量,详细分析颗粒制备过程气固流动特性,并与其他电学层析成像测量结果的对比。
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电学、超声及多模态融合层析成像技术由于具有非侵入、无扰动、无辐射等优势,在多相流过程可视化测试领域具有广泛应用前景。报告主要从多模态成像系统、图像重建算法及可视化软件设计等方面,介绍声电多模态层析成像技术及其在多相流过程可视化测试中的应用。
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非接触式电阻抗成像(CIT)技术是一种基于电阻层析成像(ERT)技术发展而来的新型过程层析成像(PT)技术,它通过电容耦合的思想实现非接触式电阻抗测量,并同时对电阻抗的实部和虚部加以利用以提高电阻抗信息的利用率。该报告将展示CIT技术的发展历程,主要涉及传感器结构、图像重建算法以及相关应用等内容。
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Multiphase flows play a role in many production processes in the process industry. Examples are bubble column reactors, distillation columns, fluidised beds and many more. Measuring process parameters in such systems is very difficult because most sensors are disturbed in their measuring principles by particles and interfaces. In addition, there is a need for imaging measurement technology for multiphase flows in the field of basic experimental analyses. Basic requirements are a high frame rate due to the transient nature of the flow processes, good spatial resolution and the ability to adequately image opaque multiphase mixtures in process vessels. The presentation will give an overview of the state of the art of selected tomographic imaging techniques for such applications.
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In many fields of process industry, it is essential to be able to accurately measure the volumetric flow rates and mass flows of different materials flowing in the process pipes. To estimate the volumetric flow rate of a certain phase, the volumetric fraction and the flow velocity field of the phase in a cross-section of the process pipe need to be known. For velocity field metering, electromagnetic flow tomography (EMFT) techniques have recently been developed in our research group. This lecture gives an overview on the basics of the EMFT technique. Common measurement procedures and image reconstruction methods are reviewed and some latest results of the technology to measure single and two-phase flows are shown.
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在碳氢化合物的生产和使用领域,十年来,市场一直在寻找一款能在一些场合下替代传统气相色谱仪,又坚固耐用,可以在任何场合安装使用的分析仪。NDIR不能提供成分分解,精确度和线性度也达不到。FTIR当作一种计量技术,价格太贵,同时功能过多,建模困难。气相色谱不能提供在许多场合下,要求的快速响应,低维护和易于使用这些性能。这些应用包括从发电厂,运输监护,精确测量每个通道的热值,包括天然气;合成气;生物气和火炬气化合物的BTU和水气控制。经过特殊设计和优化,从硬件;紧固件;控制器;和软件达到了可以安装在严酷管线和生产线的水平,Precisive TFS可调滤波光谱技术在全球范围内被评估成为在一系列应用中唯一可以替代气相色谱,同时又能克服其缺陷的可靠方案。