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电动层析显微粒子成像测速PIV-Mitas

电动层析显微粒子成像测速PIV-Mitas

电动层析显微粒子成像测速PIV-Mitas

电动层析显微粒子成像测速PIV-Mitas

电动层析显微粒子成像测速PIV-Mitas

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¥80万 - 100万

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LaVision GmbH

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型号

FlowMaster®-Mitas

荣誉奖项

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产地

欧洲

北京欧兰科技发展有限公司

金牌
第17年
一般经销商

营业执照已审核

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核心参数

测量效果： 平面（二位/三维）

产地类别： 进口

测量频率： 低频

测速范围： 0-20m/s

测定准确度： 1%

测量区域大小： 0-1mm

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看了粒子图像测速仪(PIV)的用户又看了

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FlowMaster^® MITAS激光图像系统由一个三轴驱动显微位移平台构成，该平台拥有一个高性能的控制器并且装备了一个精度很高的显微物镜。在标准的应用中使用了一个小型的二极管泵浦固体激光器（DPSS）作为脉冲光源以及通用跨帧多曝光CCD相机。内置了同步控制单元的系统计算机负责控制整个激光图像系统。LaVision的模块化DaVis软件用以进行高级的图像采集和数据分析工作。xyz (调焦)三坐标位移台可以用一个游戏杆进行手动操作，也可以通过DaVis软件中的控制管理器进行操作。管理器中有一个包含许多位置信息的列表，每一个位置信息都可以被添加、编辑和删除。方便的可重复定位的特性保证了系统在每次操作以后，比如更换透镜以后都可以定位到原来的操作位置。激光通过一根光纤传导到显微位移平台上。一个内置的导航发光二极管用以帮助进行目标聚焦调节。其中的光波滤波模块盒可以随时更换以适应不同入射和散射波长的光信号分离。

系统主要参数指标：
1.速度场测试范围：100微米至宏观尺度
2.典型应用所需显微物镜放大倍率：5X至40X
3.显微物镜类型：平场长工作距离荧光物镜。
4.标配CCD相机灵敏度：65 % @500 nm
5.标配CCD相机分辨率：1376 x1040 像素
6.典型情况下的测量速度上限：采用5X显微物镜，双帧时间间隔为500纳秒，则测量速度上限约为20米/秒。
7.速度场分析精度：可达0.1像素。
8.层析测量精密机械定位系统性能指标：

位移数据	行程	分辨率	精度
X-轴平移	120nn	0.05um	+/-3um
y-轴平移	120mm	0.05um	+/-3um
z-轴聚焦	20mm	0.05um	+/-3um
样品台开口	84x70mm

相关方案

综合农/林/牧/渔其他医疗/卫生

微血管中速度分布轮廓检测方案(粒子图像测速)
采用LaVision公司的MITAS型显微PIV测试系统，对微血管通道中的血液流动的速度场分布进行了测量。
医疗/卫生 2019-11-29
流体中速度场,LES,大涡模拟,正交矩检测方案(粒子图像测速)
This work focuses on the development of efficient computational tools for the simulation of turbulent multiphase polydispersed flows. In terms of methodologies we focus here on the use of Large Eddy Simulation (LES) and Quadrature-Based Methods of Moments (QBMM). In terms of applications the work is finalised, in order to be applied in the future, to particle production processes (precipitation and crystallisation in particular). An important part of the work concerns the study of the flow field in a Confined Impinging Jets Reactor (CIJR), frequently used in particle production processes. The first part is limited to the comparison and analysis of micro Particle Image Velocimetry (μPIV) experiments, carried out in a previous work, and Direct Numerical Simulation (DNS), carried out in this thesis. In particular the effects of boundary and operating conditions are studied and the numerical simulations are used to understand the experimental predictions and demonstrate the importance of unavoidable fluctuations in the experimental inlets.
其他 2012-07-28
流体中速度场检测方案
PIV systems rely on a combination of seed particles, laser light intensity, and camera positioning to collected velocity data. Careful attention is needed when selecting the ap- propriate setup conguration for PIV systems. This paper focuses on several areas for improvement in PIV data collection for a compressible turbulent boundary layer study on a at plate using MVG's. The topics include determining the seed particle surface preparation for a at plate, and PIV system conguration.
农/林/牧/渔 2012-07-10
流体中评价比较分析手段的方法检测方案(粒子图像测速)
In this report we present the methodology we are using in the AMI group to compare optic flow estimation methods in the context of the FLUID Specific Targeted Research Project - Contract No 513633 founded by the CEE. The main goal of this report is to try to unify comparison criteria between the different parnerts in order to share information and conclusions. We think that it is one of the topics we have to address in Las Palmas Meeting December next. In order to describe the methodology we use, we divide it in five steps: 1. We choose a number of optic flow estimation methods 2. We choose an image sequence dataset to apply the methods. 3. We apply the methods and we store the results in a ASCII file using an standard format 4. We define a number of statistics to compare the methods (we use the ASCII files as basic information to compare). 5. We compute the statistics for each pair of methods and we generate tables with the information. To help result interpretation we use arrow images and in the case we know the optic flow groundtruth we generate image to provide the information about what method perform better in the different areas of the image. To illustrate this approach and to fit ideas we present the results of this approach in a particular image sequence provided by LaVision in sections from 1.1 to 1.4. Then, in section 2 we remark some of the difficulties we have found in our work, which should be discussed in order to be able to compare results provided by all the partners of the FLUID project.
其他 2012-07-01

流体中速度场检测方案
PIV systems rely on a combination of seed particles, laser light intensity, and camera positioning to collected velocity data. Careful attention is needed when selecting the ap- propriate setup conguration for PIV systems. This paper focuses on several areas for improvement in PIV data collection for a compressible turbulent boundary layer study on a at plate using MVG's. The topics include determining the seed particle surface preparation for a at plate, and PIV system conguration.
农/林/牧/渔 2012-07-10
鸟禽中胚胎心脏血浆的流动状态检测方案(粒子图像测速)
The measurement of blood-plasma velocity distributions with spatial and temporal resolution in vivo is inevitable for the determination of shear stress distributions in complex geometries at unsteady flow conditions like in the beating heart. A nonintrusive, whole-field velocity measurement technique is required that is capable of measuring instantaneous flow fields at submillimeter scales in highly unsteady flows. Micro particle image velocimetry ðmPIVÞ meets these demands, but requires special consideration and methodologies in order to be utilized for in vivo studies in medical and biological research. We adapt mPIV to measure the blood-plasma velocity in the beating heart of a chicken embryo. In the current work, bio-inert, fluorescent liposomes with a nominal diameter of 400nm are added to the flow as a tracer. Because of their small dimension and neutral buoyancy the liposomes closely follow the movement of the blood-plasma and allow the determination of the velocity gradient close to the wall. The measurements quantitatively resolve the velocity distribution in the developing ventricle and atrium of the embryo at nine different stages within the cardiac cycle. Up to 400 velocity vectors per measurement give detailed insight into the fluid dynamics of the primitive beating heart. A rapid peristaltic contraction accelerates the flow to peak velocities of 26 mm/s, with the velocity distribution showing a distinct asymmetrical profile in the highly curved section of the outflow tract. In relation to earlier published gene-expression experiments, the results underline the significance of fluid forces for embryonic cardiogenesis. In general, the measurements demonstrate that mPIV has the potential to develop into a general tool for instationary flow conditions in complex flow geometries encountered in cardiovascular research.
农/林/牧/渔 2012-01-14

流体中速度场,LES,大涡模拟,正交矩检测方案(粒子图像测速)
This work focuses on the development of efficient computational tools for the simulation of turbulent multiphase polydispersed flows. In terms of methodologies we focus here on the use of Large Eddy Simulation (LES) and Quadrature-Based Methods of Moments (QBMM). In terms of applications the work is finalised, in order to be applied in the future, to particle production processes (precipitation and crystallisation in particular). An important part of the work concerns the study of the flow field in a Confined Impinging Jets Reactor (CIJR), frequently used in particle production processes. The first part is limited to the comparison and analysis of micro Particle Image Velocimetry (μPIV) experiments, carried out in a previous work, and Direct Numerical Simulation (DNS), carried out in this thesis. In particular the effects of boundary and operating conditions are studied and the numerical simulations are used to understand the experimental predictions and demonstrate the importance of unavoidable fluctuations in the experimental inlets.
其他 2012-07-28
流体中评价比较分析手段的方法检测方案(粒子图像测速)
In this report we present the methodology we are using in the AMI group to compare optic flow estimation methods in the context of the FLUID Specific Targeted Research Project - Contract No 513633 founded by the CEE. The main goal of this report is to try to unify comparison criteria between the different parnerts in order to share information and conclusions. We think that it is one of the topics we have to address in Las Palmas Meeting December next. In order to describe the methodology we use, we divide it in five steps: 1. We choose a number of optic flow estimation methods 2. We choose an image sequence dataset to apply the methods. 3. We apply the methods and we store the results in a ASCII file using an standard format 4. We define a number of statistics to compare the methods (we use the ASCII files as basic information to compare). 5. We compute the statistics for each pair of methods and we generate tables with the information. To help result interpretation we use arrow images and in the case we know the optic flow groundtruth we generate image to provide the information about what method perform better in the different areas of the image. To illustrate this approach and to fit ideas we present the results of this approach in a particular image sequence provided by LaVision in sections from 1.1 to 1.4. Then, in section 2 we remark some of the difficulties we have found in our work, which should be discussed in order to be able to compare results provided by all the partners of the FLUID project.
其他 2012-07-01

微血管中速度分布轮廓检测方案(粒子图像测速)
采用LaVision公司的MITAS型显微PIV测试系统，对微血管通道中的血液流动的速度场分布进行了测量。
医疗/卫生 2019-11-29
细胞中共聚焦显微PIV方法研究高压积红细胞流动的近壁不稳定性检测方案(粒子图像测速)
In hemodynamics, the inherent intermittency of two-phase cellular-level flow has received little attention. Unsteadiness is reported and quantified for the first-time in the literature using a combination of fluorescent dye labelling, time-resolved scanning confocal microscopy, and micro-particle image velocimetry (μPIV). The near-wall red blood cell (RBC) motion of physiologic high-hematocrit blood in a rectangular microchannel was investigated under pressure driven flow. Intermittent flow was associated with (1) the stretching of RBCs as they passed through RBC clusters with twisting motions; (2) external flow through local obstacles; and (3) transitionary rouleaux formations. Velocity profiles are presented for these cases. Unsteady flow clustered in local regions. Extra-cellular fluid flow generated by individual RBCs was examined using submicron fluorescent microspheres. The capabilities of confocal μPIV post-processing were verified using synthetic raw PIV data for validation. Cellular interactions and oscillating velocity profiles are presented and 3D data are made available for computational model validation.
医疗/卫生 2012-01-14

相关仪器相关资料

DaVis-PIV系统图像数据采集和硬件控制的集成软件平台

DaVis是德国LaVsion公司推出的应用于反应和非反应流场测量，材料表面成像和追迹以及超快成像的智能（激光）成像技术的完整软件平台。 DaVis以灵活的图像采集模块，可用户定制的应用界面和特殊应用软件包三大特色功能成就了完美的成像系统所需软件。 DaVis软件可满足用户以纳秒量级的精度进行相机曝光，外部照明以及外部触发的同步控制并能自由选择采集图像序列。除此之外，DaVis软件拥有各种成像设置和控制的功能。 DaVis软件对用户开放，这种特色结合软件本身的宏命令语言，能够使得成像系统快速适应从高深的科学研究到可靠的工业应用等各种不同测量需求。不仅如此，DaVis还拥有灵活的图像采集模式，先进的图像处理算法，多维图像数据的智能存储和显示，多种硬件的软件控制等功能。集成了2DPIV和3DPIV功能模块的DaVis软件，参加了连续三年的PIVChallenge（http://www.pivchallenge.org）评测活动，均取得了优异成绩。客观证明了DaVis软件平台的出色性能。 PIVChallenge的组织者将两次PIVChallenge 活动的结果作了详尽的总结，并将结果发表在了公开的网站和杂志上。有关文章和下载网址如下： 1. Stanislas M, Okamoto K, Kaehler C (2003) Main results of the First International PIV Challenge. Meas Sci Technol 14:R63-R89 下载地址： http://stacks.iop.org/0957-0233/14/R63 或： http://www.oplanchina.com/download/Stanislas PIV challenge 2001.pdf 2. Stanislas M, Okamoto K, Kaehler C, Westerweel J (2005) Main results of the Second International PIV Challenge. Exp Fluids 39: 170-191 下载地址：http://www.oplanchina.com/download/PIV Challenge 2003 Results.pdf

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