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Imager SX PIV相机

Imager SX PIV相机

Imager SX PIV相机

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LaVision GmbH

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Imager SX

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欧洲

北京欧兰科技发展有限公司

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第17年
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Depending on the requirements for your specific application LaVision offers different PIV cameras.

Imager SX cameras are very compact and lightweight, price-efficient high resolution and low noise digital cameras. The cameras are available with 4MegaPixel or 5MegaPixel spatial resolution and frame rates up to 30 Hz and 15 Hz respectively. Both models can be operated at full spatial resolution or in reduced resolution mode so that a high framerate can be achieved when required.

相关方案

综合其他医疗/卫生交通地矿航空航天

流体中速度场检测方案(粒子图像测速)
The results of flow experiments performed in a cylinder array designed to mimica Next Generation Nuclear Plant lower plenum design are presented. Pressure drop and velocity field measurements are made. Based on these measurements, five regimes of behavior are identified that are found to depend on Reynolds number. It is found that the recirculation region behind the cylinders is shorter than that of half cylinders placed on the wall representing the symmetry plane.
其他 2008-06-09
短耳犬蝠中速度场,速度矢量场检测方案(粒子图像测速)
We investigated the detailed kinematics and wake structure of lesser dog-faced fruit bats (Cynopterus brachyotis) flying in a wind tunnel. High speed recordings of the kinematics were conducted to obtain three-dimensional reconstructions of wing movements. Simultaneously, the flow structure in the spanwise plane perpendicular to the flow stream was visualized using time-resolved particle image velocimetry. The flight of four individuals was investigated to reveal patterns in kinematics and wake structure typical for lower and higher speeds. The wake structure identified as typical for both speed categories was a closed-loop ring vortex consisting of the tip vortex and the limited appearance of a counter-rotating vortex near the body, as well as a small distally located vortex system at the end of the upstroke that generated negative lift. We also investigated the degree of consistency within trials and looked at individual variation in flight parameters, and found distinct differences between individuals as well as within individuals. Supplementary material available online at http://jeb.biologists.org/cgi/content/full/213/20/3427/DC1 Key words: bat flight, kinematics, wake structure.
其他 2011-02-17
流体中速度场检测方案(粒子图像测速)
Gene expression studies are important for understanding gene regulation, deducing cell signal cascades, etc. More broadly, these studies are often used to understand disease development, as specific genes are commonly up regulated in clinical pathologies. These studies can be paired with the application of a mechanical stimulus as well; for example, endothelial cells can be exposed to a defined fluid flow (physiological or pathological) in order to understand the possible mechanisms for atherosclerosis development.
其他 2008-04-22
漩涡,空穴中漩涡间相互作用,空穴生成机理,速度场,速度矢量场,流场检测方案(粒子图像测速)
Multiple concentrated vortices are often produced in the wake of lifting surfaces and downstream of pumps, turbines, and propulsors. The roll-up of multiple vortex strands is a common feature of these flows. In this study, we are examining the interaction of two vortices of variable strength and relative rotation (e.g. co-rotating or counter-rotating). A pair of equal-strength co-rotating vortices will merge to form a single vortex. However, as the relative strength of the vortices is decreased, the weaker vortex can wrap around the stronger vortex, causing the weaker vortex to be stretched. This stretching process can lead to cavitation inception. In the present work, we will examine this inception process.
其他 2008-02-13

流体中速度场检测方案(粒子图像测速)
The results of flow experiments performed in a cylinder array designed to mimica Next Generation Nuclear Plant lower plenum design are presented. Pressure drop and velocity field measurements are made. Based on these measurements, five regimes of behavior are identified that are found to depend on Reynolds number. It is found that the recirculation region behind the cylinders is shorter than that of half cylinders placed on the wall representing the symmetry plane.
其他 2008-06-09
短耳犬蝠中速度场,速度矢量场检测方案(粒子图像测速)
We investigated the detailed kinematics and wake structure of lesser dog-faced fruit bats (Cynopterus brachyotis) flying in a wind tunnel. High speed recordings of the kinematics were conducted to obtain three-dimensional reconstructions of wing movements. Simultaneously, the flow structure in the spanwise plane perpendicular to the flow stream was visualized using time-resolved particle image velocimetry. The flight of four individuals was investigated to reveal patterns in kinematics and wake structure typical for lower and higher speeds. The wake structure identified as typical for both speed categories was a closed-loop ring vortex consisting of the tip vortex and the limited appearance of a counter-rotating vortex near the body, as well as a small distally located vortex system at the end of the upstroke that generated negative lift. We also investigated the degree of consistency within trials and looked at individual variation in flight parameters, and found distinct differences between individuals as well as within individuals. Supplementary material available online at http://jeb.biologists.org/cgi/content/full/213/20/3427/DC1 Key words: bat flight, kinematics, wake structure.
其他 2011-02-17
流体中速度场检测方案(粒子图像测速)
Gene expression studies are important for understanding gene regulation, deducing cell signal cascades, etc. More broadly, these studies are often used to understand disease development, as specific genes are commonly up regulated in clinical pathologies. These studies can be paired with the application of a mechanical stimulus as well; for example, endothelial cells can be exposed to a defined fluid flow (physiological or pathological) in order to understand the possible mechanisms for atherosclerosis development.
其他 2008-04-22
漩涡,空穴中漩涡间相互作用,空穴生成机理,速度场,速度矢量场,流场检测方案(粒子图像测速)
Multiple concentrated vortices are often produced in the wake of lifting surfaces and downstream of pumps, turbines, and propulsors. The roll-up of multiple vortex strands is a common feature of these flows. In this study, we are examining the interaction of two vortices of variable strength and relative rotation (e.g. co-rotating or counter-rotating). A pair of equal-strength co-rotating vortices will merge to form a single vortex. However, as the relative strength of the vortices is decreased, the weaker vortex can wrap around the stronger vortex, causing the weaker vortex to be stretched. This stretching process can lead to cavitation inception. In the present work, we will examine this inception process.
其他 2008-02-13

血小板,双瓣尖人工心脏瓣膜,凝血趋势,新型体外流动系统中流场速度场,速度矢量场检测方案(粒子图像测速)
Thromboembolic events caused by implanted cardiovascular devices present serious challenges to surgeons and researchers alike. In particular bileaflet mechanical heart valves are prone to thrombus formation in the hinge region due to a combination of high shear stress and stagnation regions. Shear-induced platelet activation and aggregation is usually studied using viscometers, parallel plate flow, and other non-physiologic in vitro configurations. However, it is desirable to study this phenomenon in a more physiological environment.
医疗/卫生 2008-06-15
驱动形状记忆泡沫塑料中速度场,速度矢量场检测方案(粒子图像测速)
Shape memory polymer foams may be used to treat vascular aneurysms through thermal actuation of the foam from a compacted to an expanded configuration within the aneurysm structure, thereby alleviating blood pressure on the weakened aneurysm walls and reducing potential for rupture. After delivery to the aneurysm site, fiber-delivered laser light absorbed by the foam structure is converted into thermal energy, and actuation of the foam results. Introduction of nonphysiological energy into the body during foam actuation necessitates an evaluation of potential thermal damage to nearby tissue. In the present investigation, the foam is idealized as a heat-dissipating, volumetrically static object centered in a straight tube of flowing water. Velocity profiles around the heat-dissipating device are acquired experimentally with particle image velocimetry. A computational fluid dynamics package is then used to predict the experimental velocity profiles and temperature distributions by numerical solution of the Navier-Stokes and energy equations, and agreement between the computational solution and experimental results is assessed. Discussion of this assessment, as well as several preliminary procedures leading up to the creation of the heat-dissipating device and critical analysis of the methods employed, is also given. PIV and CFD are found to be in reasonable agreement with one another. Using laser-induced fluorescence as a temperature measurement modality, which is discussed in the text insofar as the technique was attempted several times and failed, together with PIV and CFD provides a formidable array of techniques exists to characterize flow around a heated device.
医疗/卫生 2011-03-27
轴流式血泵中速度场检测方案(CCD相机)
采用LaVision的图像采集和处理软件平台以及LDY300型双脉冲PIV激光器，ImagerProSX 5M 型双帧双爆光相机，构成一套粒子成像测速系统（PIV) ，并利用该系统对轴流式血泵在三种工况下流场特性进行了实验研究
医疗/卫生 2019-08-13

拖曳水池,船舶模型中速度矢量场,速度场检测方案(粒子图像测速)
In January 2004, Memorial University purchased a stereoscopic Particle Image Velocimetry (PIV) system for making flow measurements. Although the system was potentially very versatile, its primary application was envisioned to be in a towing tank. The system was supplied as a complete package of hardware and software for calibration, data collection and analysis. The intention of the PIV system designers was to collect as many data frames as possible for a fixed measurement plane location, relative to the model. This required the PIV system to be fixed on the towing carriage, moving with the model being studied. It was found during some preliminary experiments that an active seeding delivery system was necessary to ensure sufficiently high seeding particle concentration, especially when measuring flow velocities around a model hull with a large yaw angle. This paper describes the development of a seeding technique for a PIV system that can be used in a towing tank. The paper also includes an estimate of the uncertainty of the measurement system, including the analysis of the flow behind the device used to deliver seed particles into the flow.
交通 2008-06-16
流体中速度场检测方案(粒子图像测速)
This paper presents an experimental study on wave interactions with a rectangular barge in a beam sea condition. Regular waves with a wave period the same as the natural frequency of the barge were used in the experiments due to the fact that the barge is prone to capsizing under such waves. The barge was fixed on the free surface and no wave overtopping was assumed. Particle Image Velocimetry (PIV) was employed to measure the full-field two-dimensional velocity. Since the flow is highly turbulent, the phase-averaging technique was used to the extract the mean flow and turbulence properties. The mean flow pattern, including velocity, vorticity, and streamline, was analyzed to quantify the mechanism of the interactions. The generation and evolution of vorticity and turbulence kinetic energy were demonstrated.The turbulent kinetic energy is found to highly correlate with the vorticity field
交通 2008-02-11

山体,山崩中速度矢量场,脉冲波动检测方案(粒子图像测速)
Large scale digital particle image velocimetry (PIV) and laser speckle velocimetry (LSV) are applied to landslide generated impulse waves. The challenges posed to the measurement techniques in an extremely unsteady three phase flow consisting of granular matter, air and water are considered. Areas of interest up to 0.8 m by 0.8 m are investigated in the impulse wave generation zone. The complex flow phenomena present in the first stage of impulse wave initiation are: High speed granular slide impact, impulse flux transfer, flow separation and reattachement, cavity formation and collapse, slide deformation and penetration into fluid. During this first stage the three phases are separated along sharp interfaces changing significantly within time and space. A combined analysis method for PIV in water flow and LSV on the corona of the landslide surface is presented. Digital masking techniques are applied to distinguish between phases thereafter allowing phase separated image processing. The combination of PIV and LSV reveals insight into the impulse transfer mechanism. Applicability of PIV at large scale as well as to flows with large velocity gradients due to the presence of a strong shock are highlighted. An introductory vector-field obtained by means of PIV is shown in Fig. 1 with flow reattachement and characteristic saddle point above slide shoulder. Subsequent wave generation stages with granulate detrainment, bubble break up and massive phase mixing are not considered here.
地矿 2008-06-22

系留球体尾中3D3C 层析PIV检测方案(CCD相机)
采用德国LaVision公司的软件平台和四台Imager SX 4M型CCD相机。构成一套层析PIV处理系统。并利用这样的系统对受到漩涡诱导振动（VIV）影响的系留球体尾流进行了Tomo-PIV测量。
航空航天 2019-08-06

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