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Development of Image Measurement System for High Velocity Flow Field

高速流场图像测量系统的研制

基本信息

批准号：
06555306
负责人：
OKUNO Taketoshi
金额：
$ 3.78万
依托单位：
Osaka Prefecture University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research (B)
财政年份：
1994
资助国家：
日本
起止时间：
1994 至 1995
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-06555306/
关键词：
Image Measurement Iaser Light High Velocity Flow Field Mechanical Shutter Visualization

项目摘要

Main purpose of this research project is developing a news image measurement system for velocity field using controllable mechanical shutter, and also developing some analysis methods. In this research, the method in which two time sequential images are used for the analysis such as correlation method is employed. During the research, the several applications and some consideration are of course made. The followings are the results.(1) Mechanical shutter system is suitable for the control to the laser light sheet, rather than the so-called black cell, from the practical view point.(2) It is possible to control the shutter as 1/000 sec. This enables to measure the flow with 2.0 - 3.0 m/s. And also it is possible to measure a more high velocity field by controlling the rage of image.(3) In this system, the most popular NTSC signal for the image data is used. This means that we can use the normal CCD camera and VTR system. This is important for the practical system.(4) In order to use the system in a large circulating water tunnel, the special tracer particle should be developed. One of the possible method is using micro-capsule.(5) A new approach using statistical analysis is developed here. This enables to measure the time-mean velocity field using image data directly.(6) Some of the application using laser system are shown such as wave height measurement and wall friction measurement.

本研究项目的主要目的是开发一种使用可控机械快门的速度场新闻图像测量系统，并开发一些分析方法。在本研究中，采用了使用两个时间序列图像进行分析的方法，例如相关法。在研究过程中，当然也提出了一些应用和一些考虑。结果如下：(1)从实用角度来看，机械快门系统更适合对激光光片的控制，而不是所谓的黑盒。(2)可以将快门控制为1/000秒。这样可以测量 2.0 - 3.0 m/s 的流量。并且还可以通过控制图像的范围来测量更高的速度场。(3)在该系统中，使用最流行的NTSC信号作为图像数据。这意味着我们可以使用普通的CCD摄像机和VTR系统。这对于实际系统具有重要意义。(4)为了在大型循环水隧道中使用该系统，需要开发特殊的示踪粒子。其中一种可能的方法是使用微胶囊。(5)这里开发了一种使用统计分析的新方法。这使得能够直接使用图像数据测量时均速度场。(6)展示了使用激光系统的一些应用，例如波高测量和壁摩擦测量。