All issues
Volume 16 (1996)
- Issue 63 Pages 230-
- Issue 62 Pages 161-
- Issue 61 Pages 93-
- Issue 60 Pages 2-
- Issue 1Supplement Pag･･･
- Issue Supplement2 Pag･･･
Volume 16, Issue Supplement2
Displaying 51-57 of 57 articles from this issue
-
Takeharu ETOH, Sachio OKI, Masafumi YAMAKAWA, Kohsei TAKEHARA1996 Volume 16 Issue Supplement2 Pages 191-194
Published: November 01, 1996
Released on J-STAGE: July 31, 2009
JOURNAL FREE ACCESSA technique is presented, which consists of a computer program and ancillary instruments 1) to adjust displacement of images taken by two or three image sensors and 2) to calibrate relationship between incident light intensity and corresponding digital output signal, simultaneously. The pixel-based displacement adjustment is made by corresponding a pixel of one image sensor with four pixels adjacent to that point on another sensor. The weighted average of outputs for the four pixels are then multiplied by a coefficient calculated from a pixel-based sensitivity calibration.View full abstractDownload PDF (181K) -
Takeharu ETOH, Kohsei TAKEHARA1996 Volume 16 Issue Supplement2 Pages 195-198
Published: November 01, 1996
Released on J-STAGE: July 31, 2009
JOURNAL FREE ACCESSAn in-situ storage image sensor (ISIS) capable of taking moving images at a rate of 1, 000, 000-pps is proposed. The concept is characterized as follows:(1)The CCD strips for image-signal storage are vertically elongated, extending through several pixels, while those previously proposed are all folded or bent to be placed within a pixel. (2)The CCD strips have dual roles of image-signal storage and readout.
The uni-direction transfer (1) and the dual-role CCD (2) make the proposed sensor simplest, and, thus, best among ISISs, contributing to higher frame rate, more successive-ly-stored frame numbers, and better quality of reproduced images.View full abstractDownload PDF (229K) -
Takeharu ETOH, Kohsei TAKEHARA1996 Volume 16 Issue Supplement2 Pages 199-202
Published: November 01, 1996
Released on J-STAGE: July 31, 2009
JOURNAL FREE ACCESSIt costs a few million dollars to develop a new solid-state image sensor. Various image sensors with special useful functions have been proposed for individual scientific and engineering research purposes. However, the enormous cost hampers their development. Presented in this paper is an attempt to classify wide-range of requirements for image sensors for scientific and engineering use, and to combine them into a limited number of specific designs. This will greatly reduce overlapping cost for the development, and contribute to realization of the designs.View full abstractDownload PDF (218K) -
Kouzou SUDOU, Masaru SUMIDA, Hideki HIBARA, Nobukazu SHIMADA, Yukio IS ...1996 Volume 16 Issue Supplement2 Pages 203-206
Published: November 01, 1996
Released on J-STAGE: July 31, 2009
JOURNAL FREE ACCESSTwo-dimensional submerged water jets have been visualized by two kinds of methods, i.e. a method of using hydrogen bubbles and one of tracing small solid particles. The flow characteristics are investigated systematically. On the strength of the results of visualization experiments, the flow can be classified into some typical patterns, depending on the flow conditions.View full abstractDownload PDF (234K) -
Miki YAGITA, Tsuyosi TWASAKI, Koiichi DOMOTO1996 Volume 16 Issue Supplement2 Pages 207-210
Published: November 01, 1996
Released on J-STAGE: July 31, 2009
JOURNAL FREE ACCESSWe investigated a turbulent mixing process based on the interaction of unsteady two-dimensional jets which were arranged in parallel in a water tank. The nozzle width of jots used for the experiment is 6mm and the aspect ratio is 20. The nozzle interval in the case of two or three nozzles in parallel is 7 times the nozzle width. The flow visualization was performed to find the interaction of jets with varying the exit velocity and the issuing period. The results of the parallel jets were compared with those of a single jet and the difference hetween them was found for their mixing processes.View full abstractDownload PDF (248K) -
Tomoyuki NAKAMURA, Junjiro IWAMOTO1996 Volume 16 Issue Supplement2 Pages 211-214
Published: November 01, 1996
Released on J-STAGE: July 31, 2009
JOURNAL FREE ACCESSIn order to investigate jet structure and oscillation phenomena of underexpanded impinging jet, we visualize the flow field using optical technique and measure pressure correlation on the plate. At nozzle pressure ratio 3.5, it is found from the pressure correlation that the oscillation has two modes. One is axisymmetric mode, the other is whirling mode. Shadowgraph pictures using nano-spark light show the former mode clearly.View full abstractDownload PDF (4243K) -
Shinzaburo UMEDA, Wen-Jei YANG, Toshimasa TAKAHASHI1996 Volume 16 Issue Supplement2 Pages 215-218
Published: November 01, 1996
Released on J-STAGE: July 31, 2009
JOURNAL FREE ACCESSIt is important to study mechanisms of flow networks arranged in an in-line or staggered order by flow visualization methods. An experimental study was performed to disclose the flow characteristics in newly typed flow networks with which slot-perforated plate bundles are arranged in different types. The flow patterns were visualized by the tracer method and LDV. The secondary flow with vortices and the flow-induced vibration are visible in the plate bundles. It is disclosed that the difference of vortices occurring in the slot-perforated plate bundles depends on their arrangements.View full abstractDownload PDF (1486K)