scholarly journals MEASURING COMPLEX FOR STUDYING EVAPORATION OF LIQUID DROPS ON A SUBSTRATE

2021 ◽  
Vol 8 ◽  
pp. 126-133
Author(s):  
Andrey V. Kokorin ◽  
Alexander D. Nazarov ◽  
Anatoly F. Serov
Keyword(s):  
Liquid Phase ◽  
Measuring Equipment ◽  
Measuring Device ◽  
Liquid Drops ◽  
Drop Shape ◽  
Software Complex ◽  
Measuring Complex ◽  
Digital Microscope ◽  
Height Drop

The measuring equipment is a hardware-software complex consisting of a capacitive measuring device for the thickness of a lying drop, a digital microscope and a coordinate device. The equipment makes it possible to “scan” the drop and obtain the data of the height, drop shape, and the line of contact of the liquid phase with the surface that change during evaporation.

scholarly journals The role of drop shape in impact and splash

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Qingzhe Liu ◽  
Jack Hau Yung Lo ◽  
Ye Li ◽  
Yuan Liu ◽  
Jinyu Zhao ◽  
...  
Keyword(s):  
Electromagnetic Field ◽  
Spherical Geometry ◽  
Impact Dynamics ◽  
Helmholtz Instability ◽  
Liquid Drops ◽  
Drop Shape ◽  
Spreading Dynamics ◽  
Solid Substrates ◽  
The Impact

AbstractThe impact and splash of liquid drops on solid substrates are ubiquitous in many important fields. However, previous studies have mainly focused on spherical drops while the non-spherical situations, such as raindrops, charged drops, oscillating drops, and drops affected by electromagnetic field, remain largely unexplored. Using ferrofluid, we realize various drop shapes and illustrate the fundamental role of shape in impact and splash. Experiments show that different drop shapes produce large variations in spreading dynamics, splash onset, and splash amount. However, underlying all these variations we discover universal mechanisms across various drop shapes: the impact dynamics is governed by the superellipse model, the splash onset is triggered by the Kelvin-Helmholtz instability, and the amount of splash is determined by the energy dissipation before liquid taking off. Our study generalizes the drop impact research beyond the spherical geometry, and reveals the potential of using drop shape to control impact and splash.

Challenge for the Traceable Dimensional Measurement Using CMM in Factory Floor

2017 ◽  
Vol 870 ◽  
pp. 243-248
Author(s):  
Osamu Sato ◽  
Kazuya Matsuzaki ◽  
Hiroyuki Fujimoto ◽  
Sonko Osawa ◽  
Makoto Abe ◽  
...  
Keyword(s):  
Measuring Equipment ◽  
Three Dimensional ◽  
Calibration Procedure ◽  
Measuring Device ◽  
Dimensional Measurement ◽  
Temperature Measuring ◽  
Measurement Results ◽  
Temperature Measuring Instrument ◽  
Three Dimensional Coordinate ◽  
Factory Floor

Dimensional measurement is a key process in the quality assurance of manufacturing. Not only classical one-dimensional measurement devices, several kind of three-dimensional coordinate measuring systems (CMSs) including coordinate measuring machines (CMMs) are used for dimensional measurement tasks in measurement rooms or in factory floors. For the purpose of the quality guarantee, the measurement for the validation on the products should be performed with the traceable manner. In the case of the dimensional measurement, the measurement results of the products should be stated as the corresponding values in the reference temperature, 20 °C. Therefore, at least the traceability of the length indication instruments and temperature-measuring equipment installed into the measuring device to be used should be ensured. Usually, the traceability of the instrument or equipment is ensured through the calibration on it. Now, typical CMMs in factory floor have non-calibrated temperature-measuring equipment because the equipment is hard to be detached off for the calibration, and therefore, the temperature-measuring equipment is usually left uncalibrated. Recently, a new procedure by which both the length indication instruments and temperature-measuring equipment installed into a CMM are able to be calibrated simultaneously is established. In this research, the traceable dimensional measurement using a CMM equipped with uncalibrated temperature-measuring instrument is developed by as an application of the established calibration procedure. Through the experiment, the traceable dimensional measurement using the CMM placed on the factory floor is demonstrated.

scholarly journals MAKING SERVICE LEVEL MEASURING EQUIPMENT (SERVICE DETECTOR) IN BADMINTON SPORTS

2021 ◽  
Vol 13 (1) ◽  
pp. 61
Author(s):  
Ali Syafani ◽  
Ari Subarkah ◽  
Ika Novitaria Marani
Keyword(s):  
Research Method ◽  
Measuring Equipment ◽  
Field Trials ◽  
Service Level ◽  
Human Motion ◽  
Research Subjects ◽  
Ultrasonic Sensors ◽  
Measuring Device ◽  
Validation Test ◽  
Expert Validation

This study aims to determine how to manufacture a service height measuring device in badminton. The research method used in this research was the Sugiyono model of research and development (R & D) with 5 stages from the nee analysis until field test. The research subjects for the tool trial were 25 referees and 50 men's doubles players who competed using a service height measuring device in badminton. The validation test used in this study is to use the expert justification test which consists of 1 expert lecturer in badminton and 2 referees who have BA certified. After the expert validation test was carried out, then the tool was tested and distributed a questionnaire about the attractiveness and convenience of the service level measuring device at the badminton branch. The result of this research is that measuring service stroke height using ultrasonic sensors is suitable for use in badminton matches to assist service judges in making decisions whether the service stroke is a fault or not. And based on the results of field trials, shows that measuring service stroke height using ultrasonic sensors is attractive and easy to use. The suggestion for this research is to find a tool that is more sensitive to distance and human motion or by using an application.

scholarly journals Use of the optioelectronic ВБХ 731.4 measuring complex in ballistic research

2019 ◽  
Vol 16 ◽  
pp. 60-63
Author(s):  
O. Melnuk
Keyword(s):  
Kinetic Energy ◽  
Measuring Equipment ◽  
Measuring Complex ◽  
Specific Kinetic Energy

The practice describes the use of certain measuring equipment to determine the affiliation of certain items to firearms. The author analyzes the study of firearms, and conducts an experiment to determine the specific kinetic energy of projectiles to hit a target. To conduct the experiment, the author uses the ВБХ 731.4 measuring complex in accordance with current methods.

scholarly journals PRACTICAL IMPLEMENTATION OF HARDWARE AND SOFTWARE COMPLEX FOR PLANAR MEASUREMENTS OF ANTENNA CHARACTERISTICS IN THE NEAR ZONE

2017 ◽  
Vol 8 (4) ◽  
pp. 334-343
Author(s):  
A. G. Buday ◽  
A. P. Grinchuk ◽  
A. V. Gromyko
Keyword(s):  
Modular Design ◽  
Dynamic Range ◽  
Antenna System ◽  
Practical Implementation ◽  
Experimental Sample ◽  
Software Complex ◽  
Measuring Complex ◽  
Wide Range ◽  
Near Zone ◽  
Antenna Systems

Directional patterns measurement of antennas is carried out by the methods of far and near zone. Measurements in the far zone are straightforward; however they have a number of disadvantages. Near zone measurement methods are free from measurement shortcomings in the far zone, but it requires complex and expensive equipment for its implementation.Earlier, the authors have developed a concept of hardware and software modular design complex to determine antenna system characteristics as per measurements in the near zone. This concept assumes creation of a universal measuring complex to investigate various types of antenna systems with any type of measurement surface (plane, cylinder, sphere) in order to solve a wide range of applied problems. The purpose of this work lies in practical implementation of a variant of this measuring complex for measurement along the plane and determination of its metrological (hardware and software) capabilities.A working experimental sample of hardware and software complex for measuring the characteristics of antenna systems that realizes a radio-holographic method for measuring along a plane has been developed, created and practically tested. A preliminary estimation of errors in amplitude and phase measurements in the dynamic range of 45 dB and a comparison of the characteristics of several types of antennas measured in far and near zones have been made. Algorithms have been developed, a software for processing, storing and graphical display of measurement results has been created.

Evaluation of LuGre Tire Friction Model with Measured Data on Multiple Pavement Surfaces

2010 ◽  
Vol 38 (3) ◽  
pp. 213-227 ◽  
Author(s):  
M. P. Rajapakshe ◽  
M. Gunaratne ◽  
A. K. Kaw
Keyword(s):  
Measuring Equipment ◽  
Surface Friction ◽  
Friction Model ◽  
Measured Data ◽  
Model Parameters ◽  
Lugre Model ◽  
Measuring Device ◽  
Braking Control ◽  
Tire Friction ◽  
Pavement Friction

Abstract Accurate modeling of tire/pavement friction phenomena is of utmost importance in many applications such as vehicle braking control and frictional evaluation of pavements. LuGre tire friction model is a model which is used for this purpose by estimating its parameters using measured pavement friction data. In this investigation, LuGre model parameters were estimated using field data collected by a standard pavement friction measuring device (Locked Wheel Skid Trailer-ASTM E 274) at a group of pavements with different surface friction properties. Adequacy of the model to predict measured friction data from the device was statistically evaluated and the accuracy of estimated model parameters was determined. The results show the potential of this model to facilitate frictional evaluation of pavements using dynamic friction measuring equipment.

Nanocrystalline Structure of Organic Photoconducting Materials Derived by Microwave Recrystallization Method

2006 ◽  
Vol 510-511 ◽  
pp. 198-201
Author(s):  
Ji Hwan Park ◽  
Chae Ho Hwang ◽  
Dae Hee Son ◽  
Seong Soo Hong ◽  
Hong Chae Park ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Liquid Phase ◽  
Microwave Irradiation ◽  
Crystal Structures ◽  
Nanocrystalline Structure ◽  
Measuring Device ◽  
X Ray ◽  
Transmission Electron

We investigated the feasibility of preparing nanocrystalline oxotitanium phthalocyanine (TiOPc) from crude TiOPc using liquid-phase direct recrystallization under the microwave irradiation. Different crystal structures and morphologies of TiOPc were obtained through acidtreatment and recrystallization method. The nanocrystalline TiOPcs prepared in various conditions were characterized by the means of an X-ray diffractometry (XRD), a transmission electron microscopy (TEM) and a photoconductivity measuring device.

Improving the Process of High-Temperature Processing Steel-Smelting Dump Slag by Means of Experimental and Theoretical Research

2016 ◽  
Vol 843 ◽  
pp. 203-207
Author(s):  
I.V. Chumanov ◽  
Evgeny A. Trofimov ◽  
A.N. Dildin
Keyword(s):  
High Temperature ◽  
Liquid Phase ◽  
Experimental Research ◽  
Thermodynamic Modeling ◽  
Solid Phase ◽  
Theoretical Research ◽  
Phase Recovery ◽  
Software Complex ◽  
High Temperature Processing ◽  
Factsage Software

The aim of this work is conducting theoretical and experimental research of the processes and modes of high-temperature processing of steel slags for more complete extraction of the metal component. "FactSage" software complex (version 6.4) was used to execute the thermodynamic modeling of the processes occurring during the recovery of metals from steelmaking slags. The experimental research included experiments on solid-phase and liquid-phase recovery of slag samples at the temperatures of 1000 – 1500 °C. The results of thermodynamic modeling and experimental high-temperature slag processing allows speaking about the advisability of preliminary solid-phase recovery slag in the atmosphere of carbon monoxide with subsequent high-temperature (liquid phase) recovery to obtain separate metal fractions.

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