scholarly journals STUDI PENGARUH DINAMIKA TUMBUKAN MULTIPLE DROPLETS TERHADAP NILAI SPREADING RATIO PADA PERMUKAAN BIDANG PANAS YANG MIRING

2021 ◽  
Vol 5 (1) ◽  
Author(s):  
Fitrah Qalbina ◽  
Deendarlianto Deendarlianto ◽  
Indarto Indarto ◽  
Teguh Wibowo
Keyword(s):  
Image Processing ◽  
Stainless Steel ◽  
High Speed ◽  
Spray Cooling ◽  
High Speed Camera ◽  
Secondary Droplet ◽  
Stainless Steel 304

Spray cooling merupakan aplikasi dari droplets yang digunakan sebagai salah satu teknik pendinginan. Pemanfaatan dari multiple droplets ini banyak dikaji sebagai sistem pendinginan pada peralatan elektronik dan pembuatan material quenching. Dinamika tumbukan multiple droplets pada permukaan bidang miring yang dipanaskan akan dikaji pada penelitian ini. Material uji yang digunakan adalah stainless steel 304 . Temperatur permukaan yang diamati adalah 120 ºC, 180 ºC dan 220 ºC pada bilangan Weber medium 70 dengan variasi bidang kemiringan adalah sebesar 10º, 20º dan 30º. Dinamika droplet selama tumbukan diamati menggunakan high-speed camera dengan kecepatan 4000 fps kemudian hasilnya diolah menggunakan image processing. Telah diperoleh hasil bahwa spreading ratio tertinggi terjadi saat temperatur permukaan 180 ºC pada sudut kemiringan 30 º dan terendah pada temperatur 220 ºC. Fenomena secondary droplet dapat meningkatkan nilai spreading ratio. Adapun fenomena bounching terjadi pada temperatur 220 ºC

Experimental Study of Kick up Phenomenon in Thermosonic Wire-Bonding

2012 ◽  
Vol 160 ◽  
pp. 77-81
Author(s):  
Jing Jing Tian ◽  
Lei Han
Keyword(s):  
Image Processing ◽  
Experimental Study ◽  
High Speed ◽  
Gold Wire ◽  
Wire Bonding ◽  
Processing Method ◽  
Experimental Results ◽  
High Speed Camera ◽  
Depth Study ◽  
Thermosonic Wire Bonding

Kick-up phenomenon during looping is an important factor in thermosonic wire bonding. In this study, the loping process during wire bonding was recorded by using high-speed camera, and wire profiles evolution was obtained from images sequence by image processing method. With a polynomial fitting, the wire loop profiling was described by the curvature changing, and kick-up phenomenon on gold wire was found between the instant of 290th frame(0.0537s) to 380th frame (0.0703s), the change of curvature is divided into three phases, a looping phase, a mutation phase and a kick-up phase. While in the kick-up phase, the kick up phenomenon is the most obvious. These experimental results were useful for in-depth study of kick-up phenomenon by simulation.

Research on Defining Regional Boundary of the COREX Melter Gasifier by Using Image Processing

2012 ◽  
Vol 455-456 ◽  
pp. 1140-1144
Author(s):  
Zhi Guo Luo ◽  
Li Hao Han ◽  
Xiao Lei ◽  
Zhan Xia Di ◽  
Jun Jie Sun
Keyword(s):  
Image Processing ◽  
Cohesive Zone ◽  
High Speed ◽  
Processing Method ◽  
High Speed Camera ◽  
Two Dimensional ◽  
Corex Melter Gasifier ◽  
Experimental Process ◽  
Lump Coal ◽  
Regional Boundary

In this paper, a two-dimensional hot model of melter gasifier, in which paraffin and corn are used to simulate DRI, coke and lump coal respectively, has been established to study the regional boundary in this paper. While the whole experimental process is recorded by the high-speed camera, the image processing method is put forward to define each regional boundary. By means of this method, the boundary of raceway, cohesive zone can be obtained quantificationally.

scholarly journals Detection of Remote Sensing Warp Tension during Weaving on Plain Twill and Satin Fabric

2021 ◽  
Vol 29 (1(145)) ◽  
pp. 35-39
Author(s):  
Volkan Kaplan
Keyword(s):  
Remote Sensing ◽  
Image Processing ◽  
Image Analysis ◽  
Elasticity Theory ◽  
Cotton Fabric ◽  
High Speed ◽  
High Speed Camera ◽  
Warp Tension ◽  
Plain Fabric ◽  
Weave Pattern

Warp tensions were measured while a machine was operating on a woven cotton fabric with three different woven patterns. This study was carried out with image analysis methods using a high speed camera. Three weave pattern types: plain, twill and satin were woven on the same weaving machine, and thus it could be understood how weave pattern differences affect warp tension. Each of these three weaves was woven in three weft densities: 20, 28 and 45 wefts per cm. These fabrics were able to be made on a weaving machine with an automatic dobby. It was aimed to investigate warp tension differences for three basic weave patterns while keeping all machine settings constant. The weave settings of the dobby were changed for plain, twill and satin weaves. Warp tension calculation was based on the warp elasticity theory. Warp elasticises were measured by image processing methods in MATLAB using a high-speed camera. It was aimed to improve upon the new method of warp extension measurement of fabric when the loom is in operation. It was observed that the warp tension in plain fabric was higher than for twill and satin under the same conditions.

Design of Angle Adjustable Electrochemical Micro-Machining System

2009 ◽  
Vol 407-408 ◽  
pp. 619-623
Author(s):  
Shao Fu Huang ◽  
Di Zhu ◽  
Yong Bin Zeng ◽  
Yong Liu ◽  
Wei Wang
Keyword(s):  
Stainless Steel ◽  
High Speed ◽  
Experimental Results ◽  
Micro Machining ◽  
Reaction Products ◽  
Feed System ◽  
Stainless Steel 304 ◽  
Interelectrode Gap ◽  
Micro Ecm ◽  
Machining System

In order to remove the reaction products generated from the interelectrode gap of the electrochemical micro-machining, an angle adjustable electrochemical micro-machining equipment has been developed, which consists of angle adjustment unit, feed system unit, etc. Small holes have been drilled on thin stainless steel 304 by using our developed equipment. The experimental results show that the adjusted cathode working angle and high speed of cathode rotation improves micro-ECM performance characteristics.

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