An automated 3 dimensional scanning system for validation of acoustical simulation results

2008 ◽  
Vol 123 (5) ◽  
pp. 3929-3929
Author(s):  
Simo‐Pekka Simonaho
Keyword(s):  
Scanning System ◽  
3 Dimensional ◽  
Simulation Results

scholarly journals Analytical Calculation for Capacitances of Electrode Patterns in Touch Panels

2017 ◽  
Vol 3 (1) ◽  
Author(s):  
Bau-Jy Liang ◽  
Don-Gey Liu ◽  
Chia-Hung Yeh ◽  
Hsiao-Chun Chen ◽  
Yu-Chen Fang ◽  
...  
Keyword(s):  
Analytical Solution ◽  
Closed Form ◽  
Analytical Method ◽  
Analytical Calculation ◽  
3 Dimensional ◽  
Simulation Results ◽  
Complex Patterns ◽  
Touch Panels

AbstractIn this paper, an accurate 3-dimensional (3-D) analytical solution is proposed to calculate the projective capacitances of touch panels. In this study, both simple and complex patterns were investigated for the calculation. We propose a partition strategy to divide a pattern into many rectangular or triangular sub-patterns. Each sub-pattern can be further cut into 2-D slices. The capacitance of a 2-D slice was then solved by our closed-form formulae. The total capacitance of a pattern was obtained by integrating up all the partial capacitances of the slices. In this study, the precision of our analytical method was examined by comparing the simulation results obtained from Q3D

3D Laser Scanner and its Application in Engineering Survey

2013 ◽  
Vol 671-674 ◽  
pp. 2111-2114
Author(s):  
Yan Ping Feng ◽  
Wei Guo Li ◽  
Li Bing Yang ◽  
Yan Li Gao ◽  
Wen Bin Li
Keyword(s):  
Laser Scanning ◽  
Dimensional Space ◽  
Three Dimensional ◽  
Laser Scanner ◽  
Target Object ◽  
Scanning System ◽  
3 Dimensional ◽  
Working Principle ◽  
Laser Scanning System ◽  
Three Dimensional Space

3D laser scanning system is to use laser ranging principle to record intensively the 3D coordinates, reflectivity and texture information on the surface of the target object. It makes a real record of the three-dimensional space, which makes traditional measurement be released from the limit that couldn’t be exceeded in the past, and let the measurement precision up to a new level. At the same time, it has provided extensive researches with better help than ever. This paper mainly discusses the characteristics, working principle, application and future development of the ground 3 dimensional laser scanner.

Estimation of Grasp Envelope Using a 3-Dimensional Kinematic Model of the Hand

2007 ◽  
Vol 51 (15) ◽  
pp. 889-893 ◽  
Author(s):  
Jaewon Choi ◽  
D. Christian Grieshaber ◽  
Thomas J. Armstrong
Keyword(s):  
Kinematic Model ◽  
Experimental Studies ◽  
Design Stage ◽  
Contact Algorithm ◽  
3 Dimensional ◽  
Rotation Method ◽  
Simulation Results ◽  
Practical Information ◽  
Object Shapes ◽  
Simple Contact

A 3-dimensional kinematic model of the hand was developed. The model predicts hand posture using a simple contact algorithm, which detects a contact between hand segments and the object. Using the 3-dimensional kinematic model of the hand, we estimated grasp envelopes because the space requirement for a specific task is an important aspect to be considered in the task's design stage. For this purpose, two hose insertion methods – a straight method and a rotation method – were simulated. The simulation results were compared favorably with the experimental studies by the previous researches. The model can be used to estimate grasp envelopes for varying hand sizes, object sizes, object shapes, and grip types. The model gives useful and practical information about the grasp envelope to the engineers who design parts or work space.

Reliability of measuring facial morphology with a 3-dimensional laser scanning system

2005 ◽  
Vol 128 (4) ◽  
pp. 424-430 ◽  
Author(s):  
Chung How Kau ◽  
Stephen Richmond ◽  
Alexei I. Zhurov ◽  
Jeremy Knox ◽  
Ivor Chestnutt ◽  
...  
Keyword(s):  
Laser Scanning ◽  
Scanning System ◽  
Facial Morphology ◽  
3 Dimensional ◽  
Laser Scanning System

A Monolithic Three-Axis Accelerometer with Low Cross-Axis Sensitivity

2011 ◽  
Vol 403-408 ◽  
pp. 691-696
Author(s):  
Chang De He ◽  
Wen Dong Zhang ◽  
Ji Jun Xiong ◽  
Chen Yang Xue ◽  
Gui Xiong Shi
Keyword(s):  
High Performance ◽  
Proof Mass ◽  
Cantilever Beams ◽  
3 Dimensional ◽  
Simulation Results ◽  
The Cross ◽  
Sensitive Structure ◽  
Cross Axis

A 50,000g three-axis accelerometer using a single proof mass is presented. The sensitive structure is made of a single proof mass and eight cantilever beams. Twelve piezoresistors are placed on the cantilevers symmetrically, which can be used to detect 3-dimensional acceleration. The symmetric placement of the piezoresistors brings the reasonable sensitivity and simultaneously decreases the cross-axis sensitivity significantly. Simulation results show that the sensitivity in X-, Y- and Z-axis are 0.806uV/g, 0.806uV/g and 3.71uV/g respectively with 5V supply and the cross-axis sensitivities are all less than 2.4%, which ensures the high performance of the three-axis accelerometer.

DEM Simulation for Specific Gravity Separation of Plastic Particles Using Air-Table

2011 ◽  
Author(s):  
Yuki Tsunazawa ◽  
Tingwei Wang ◽  
Kenichiro Torige ◽  
Chiharu Tokoro
Keyword(s):  
Specific Gravity ◽  
Wind Velocity ◽  
Gravity Separation ◽  
Waste Products ◽  
Dem Simulation ◽  
3 Dimensional ◽  
Simulation Results ◽  
Basic Behavior ◽  
Air Table

Air-table is one of the specific gravity separators which have been expected as an effective dry separator for waste products such as plastic or glass. The objective of this study is an application of DEM to describe the basic behavior of plastic particles in an air-table separation. The mechanism of particles separation on the table has not been well-known because air-table contains many instrument parameters such as slope and shape of the table, height of the riffle, angle, amplitude and frequency of vibration and wind velocity. In this study, two types of particles which have same diameter and different density were simulated and 3 dimensional position and velocity of them were investigated in the various conditions of instrumental parameters. DEM simulation results showed that the riffle on the table play an important role for the particles separation.

scholarly journals Analisis Numerik Evaporator Pada Desalinasi Surya Sistem Vakum Alami

2018 ◽  
Vol 1 (2) ◽  
pp. 109-114
Author(s):  
Agistya D. Ronowikarto ◽  
Ridho Elranda T. Siregar ◽  
Himsar Ambarita
Keyword(s):  
Numerical Analysis ◽  
Water Productivity ◽  
Condensation Process ◽  
Clean Water ◽  
3 Dimensional ◽  
Fluid Formation ◽  
Simulation Results ◽  
Desalination Technology ◽  
Vacuum Systems ◽  
Mass Volume

Teknologi desalinasi merupakan salah satu solusi dari kelangkaan air bersih yang terjadi. Dengan menggunakan energi terbarukan yang digunakan oleh proses desalinasi umumnya berupa energi surya, angin, dan geotermal diharapkan dapat mengurangi kebutuhan energi dalam sistem desalinasi. Pada penelitian ini telah dilakukan analisis numerik perpindahan fraksi volume massa dan laju penguapan yang terjadi pada evaporator. Analisis numerik diasumsikan sebagai kasus 3 dimensi. Persamaan pembentukan fluida didiskritasikan menjadi suatu persamaan menggunakan metode volume hingga. Pada hasil simulasi dapat dilihat bahwa terjadi proses evaporasi-kondensasi pada evaporator berdasarkan hasil kontur volume fraksi dan laju penguapan berdasarkan hasil simulasi adalah sebesar 4,36×〖10〗^(-5) dengan hasil produktifitas air bersih sebanyak 1,3 liter. Hasil simulasi akan dibandingkan dengan hasil eksperimental. Dengan hasil perhitungan matematis, produktifitas air bersih sebanyak 1,38 liter akan dibandingkan dengan hasil simulasi, maka didapat bahwa terdapat ralat sebesar 6,1%.Hal ini menunjukkan bahwa evaporator pada teknologi desalinasi surya sistem vakum alami telah bekerja dengan baik.   Desalination technology is one solution to the scarcity of clean water. By using renewable energy used by the desalination process generally in the form of solar, wind and geothermal energy, it is expected to reduce energy necessities in the desalination system. This study conducted a numerical analysis of the displacement of the fraction of mass volume and evaporation rate occurred in the evaporator. Numerical analysis was assumed to be a 3-dimensional case. The fluid formation equation was discounted into an equation using the volume up method. From the simulation results, it could be seen that there was an evaporation-condensation process on the evaporator based on the volume contour fraction results and the evaporation rat. The simulation resulted 4.36 × 〖10〗 ^ (- 5) with 1.3 liters of clean water productivity. Simulation results were compared with experimental results. With the results of mathematical calculations, the productivity of 1.38 liters of clean water was compared with the simulation results, and it was found that there was an error of 6.1%. This indicated that the evaporator in the solar desalination technology of natural vacuum systems had worked well. 

scholarly journals 3D CFD Simulations of MOCVD Synthesis System of Titanium Dioxide Nanoparticles

2013 ◽  
Vol 2013 ◽  
pp. 1-11 ◽  
Author(s):  
Siti Hajar Othman ◽  
Suraya Abdul Rashid ◽  
Tinia Idaty Mohd Ghazi ◽  
Norhafizah Abdullah
Keyword(s):  
Fluid Dynamics ◽  
Titanium Dioxide ◽  
Cfd Simulation ◽  
Titanium Dioxide Nanoparticles ◽  
Chemical Vapor ◽  
Deposition Process ◽  
Organic Chemical ◽  
Synthesis System ◽  
3 Dimensional ◽  
Simulation Results

This paper presents the 3-dimensional (3D) computational fluid dynamics (CFD) simulation study of metal organic chemical vapor deposition (MOCVD) producing photocatalytic titanium dioxide (TiO2) nanoparticles. It aims to provide better understanding of the MOCVD synthesis system especially of deposition process of TiO2nanoparticles as well as fluid dynamics inside the reactor. The simulated model predicts temperature, velocity, gas streamline, mass fraction of reactants and products, kinetic rate of reaction, and surface deposition rate profiles. It was found that temperature distribution, flow pattern, and thermophoretic force considerably affected the deposition behavior of TiO2nanoparticles. Good mixing of nitrogen (N2) carrier gas and oxygen (O2) feed gas is important to ensure uniform deposition and the quality of the nanoparticles produced. Simulation results are verified by experiment where possible due to limited available experimental data. Good agreement between experimental and simulation results supports the reliability of simulation work.

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