Fluid measuring system and fluid measuring method
First Claim
Patent Images
1. A fluid measurement system, comprising:
- an imaging means for taking images of particles contained in a fluid to be measured at small time intervals, said imaging means comprising a long focus optical system being of a long distance type that images a fluid to be measured a long distance away;
an image processing means for comparing luminance pattern distributions at a plurality of consecutive time points obtained by said imaging means to measure a moving direction and a moving amount of a particle group, and analyzing a flow field of the fluid to be measured; and
a turbulence structure extraction means for extracting a turbulence structure of the fluid to be measured from the particle images obtained by said imaging means, wherein said image processing means measures a moving direction and a moving amount of the extracted turbulence structure to analyze the flow field of the fluid to be measured.
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Abstract
A fluid measurement system includes a long focus optical system at a CCD camera, and an image processing means for comparing particle images taken at two time points for analysis. The system further includes a high-pass filter for leaving high frequency components at a predetermined frequency and higher from the luminance signal of the image, so that a turbulence structure occurring in the fluid to be measured is extracted, and the turbulence structure is captured and its image is taken. Therefore, the flow field of an inaccessible fluid to be measured can be analyzed.
8 Citations
16 Claims
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1. A fluid measurement system, comprising:
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an imaging means for taking images of particles contained in a fluid to be measured at small time intervals, said imaging means comprising a long focus optical system being of a long distance type that images a fluid to be measured a long distance away; an image processing means for comparing luminance pattern distributions at a plurality of consecutive time points obtained by said imaging means to measure a moving direction and a moving amount of a particle group, and analyzing a flow field of the fluid to be measured; and a turbulence structure extraction means for extracting a turbulence structure of the fluid to be measured from the particle images obtained by said imaging means, wherein said image processing means measures a moving direction and a moving amount of the extracted turbulence structure to analyze the flow field of the fluid to be measured. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A fluid measurement method, comprising:
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taking images of particles contained in a fluid to be measured a long distance away at small time intervals by an imaging means comprising a long focus optical system, comparing luminance pattern distributions of particle images at a plurality of consecutive time points obtained by the imaging means to measure a moving direction and a moving amount of a particle group; analyzing a flow field of the fluid to be measured from the moving direction and the moving amount of the particle group; and extracting a turbulence structure of the fluid to be measured and measuring the moving direction and the moving amount of the extracted turbulence structure to analyze the flow field of the fluid to be measured, when the number of particles contained in one pixel of the particle image obtained by the imaging means is plural. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A fluid measurement system, comprising:
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a camera configured to take images of particles contained in a fluid to be measured at small time intervals, said camera comprising a long focus optical system being of a long distance type configured to image a fluid to be measured a long distance away; and a computer including an image processor configured to compare luminance pattern distributions at a plurality of consecutive time points obtained by said camera to measure a moving direction and a moving amount of a particle group, and analyze a flow field of the fluid to be measured and a turbulence structure extractor configured to extract a turbulence structure of the fluid to be measured from the particle images obtained by said camera, wherein said image processor measures a moving direction and a moving amount of the extracted turbulence structure to analyze the flow field of the fluid to be measured.
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Specification