Transactions of the Visualization Society of Japan最新文献_第2页

Investigation of Data Acquisition Conditions for Dynamic Mode Decomposition in Unsteady PSP Measurement 非定常PSP测量中动态模态分解数据采集条件研究

Transactions of the Visualization Society of Japan Pub Date : 1900-01-01 DOI: 10.3154/tvsj.41.11

T. Ikami, Koji Fujita, H. Nagai, Yutaro Matsuda, Y. Egami

引用次数: 0

Effect of Nozzle Length on Jet Occurring Explosive Droplets Splashing 喷嘴长度对射流发生爆炸液滴飞溅的影响

Transactions of the Visualization Society of Japan Pub Date : 1900-01-01 DOI: 10.3154/tvsj.40.17

Tsutomu Ishido, H. Hasegawa

引用次数: 0

Validation of a super-resolution measurement using frequency filtering technique and optical displacement analysis of bubble surface in breathing mode oscillation 基于频率滤波技术的超分辨率测量验证及呼吸模式振荡气泡表面的光学位移分析

Transactions of the Visualization Society of Japan Pub Date : 1900-01-01 DOI: 10.3154/TVSJ.41.1

T. Oku, H. Hirahara, D. Kang

{"title":"Validation of a super-resolution measurement using frequency filtering technique and optical displacement analysis of bubble surface in breathing mode oscillation","authors":"T. Oku, H. Hirahara, D. Kang","doi":"10.3154/TVSJ.41.1","DOIUrl":"https://doi.org/10.3154/TVSJ.41.1","url":null,"abstract":"A sound is generated when a bubble detaches from a nozzle installed in the water. The sound emission is known as a monopole sound source. This frequency is expressed by Minnaert's equation, and many studies have been conducted on bubble deformation, detachment, and coalescence. However, many physical processes still involve the unsettled phenomena regarding the mechanical behavior of the sound source. In this study, we report that the breathing mode was directly analyzed by an optical measurement, following the simulation of the breathing mode by CFD in the previous report. The present super-resolution measurement gives a sufficient result to discuss the oscillatory motion of bubble surface where the displacement of the bubble is so small that the normal observation cannot capture. In the present research, the numerical simulation of the measurement method was conducted, and measurement of the vibration disc were performed as the preliminary experiments. Thus, the optimum measurement parameters were extracted, and they were applied to the displacement measurement of the breathing mode of the bubble. The results show a good agreement with the CFD ones.","PeriodicalId":246197,"journal":{"name":"Transactions of the Visualization Society of Japan","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134328731","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Characteristics of flow structure due to circularization of straight open channel corner 直明渠角圆化后的流动结构特征

Transactions of the Visualization Society of Japan Pub Date : 1900-01-01 DOI: 10.3154/tvsj.42.1

Katsutoshi Watanabe, Yuya Mito, H. Une, K. Asai

引用次数: 0

PIV計測とニューラルネットワークを活用した粉体噴流プロセスのモデル化検討利用PIV测量和神经网络的粉体喷流过程建模研究

Transactions of the Visualization Society of Japan Pub Date : 1900-01-01 DOI: 10.3154/tvsj.43.15

Yuki Furutani

引用次数: 0

Simultaneous measurement of particle position and displacement in depth by depth-from-defocus using time-series color images 利用时间序列彩色图像进行离焦深度同时测量粒子位置和深度位移

Transactions of the Visualization Society of Japan Pub Date : 1900-01-01 DOI: 10.3154/TVSJ.39.19

M. Deguchi, S. Murata, Yohsuke Tanaka

{"title":"Simultaneous measurement of particle position and displacement in depth by depth-from-defocus using time-series color images","authors":"M. Deguchi, S. Murata, Yohsuke Tanaka","doi":"10.3154/TVSJ.39.19","DOIUrl":"https://doi.org/10.3154/TVSJ.39.19","url":null,"abstract":"Simultaneous measurement of particle position and displacement in depth by depth-from-defocus using time-series color images Miki DEGUCHI, Shigeru MURATA and Yohsuke TANAKA ABSTRACT This paper presents a method for simultaneous measurement of particle position and displacement in depth by depth-from-defocus using time series color images. This method enables us to obtain the particle information for 3D-PIV by using a single color camera. To improve the depth measurement accuracy, three differently blurred images are simultaneously captured as RGB color images and the depth information is estimated from the three images with a neural network considering in-plane position. In performance tests, we numerically and experimentally evaluate the measurement accuracy of particle position and displacement in depth. The results of depth position by neural network show that the RMS error decreases to 65% of that by a calibration line. The results of depth displacement from three color images show that the RMS error decreases to 24% of that from only one color image, corresponding to 9.5% for maximum displacement 2 mm.","PeriodicalId":246197,"journal":{"name":"Transactions of the Visualization Society of Japan","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131239357","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Performance Improvement of Digital Holographic Particle Measurement by Suppression of Speckle-like Noise and Particle Image Elongation in Depth Direction 抑制类散斑噪声和深度方向上粒子图像伸长提高数字全息粒子测量性能

Transactions of the Visualization Society of Japan Pub Date : 1900-01-01 DOI: 10.3154/tvsj.40.9

Masatsugu Murayama, S. Murata, Yohsuke Tanaka

引用次数: 0