Affiliations: Department of Civil and Environmental Engineering,
Kinki University, Higashi-Osaka, Osaka 577-8502, Japan.
Abstract: The most promising next generation Image Velocimtry (IV) is the
high-speed Dynamic PIV. It requires the development of innovative high-speed
video camera sensors. We started by specifying the required performance of
these new sensors, for measurements in air and water flows. These criteria
founded on the most recent developments in PIV algorithms and incorporate
results from a large questionnaire survey of users of high-speed video cameras
in Japan. The results suggest that the followings are required: (1) frame rate
of 1,000,000 fps, (2) pixel count of 1,000,000 pixels, (3) frame storage
capacity of 100 - 200 frames for tracing a single event and 10,000 frames for
turbulent measurements, (4) gray levels of 4 - 8 bits for PTV; 12 bits for
observation. Finally, we reviewed the state of the art of high-speed
video-image sensors. Currently the standard parallel-readout sensors can
operate at 1 Kfps with a pixel count of approximately 1 Kpixels. The In-situ
Storage Image Sensor (ISIS) developed by the authors has recently achieved
frame rates of 1 Mfps.
Keywords: high-speed video camera , ISIS , Dynamic PIV , PTV, image sensor