Yuki Ishizaki, Terutake Hayashi, Masaki Michihata, Yasuhiro Takaya
We suggest a novel nanoparticle sizing method based on fluorescence polarization analysis. Particle size evaluation can be achieved by measuring the rotational diffusion coefficient, which is sensitive to the particle size. We develop a rotational diffusion coefficient measurement system and a fluorescent probe, which is labelled to particle. In order to verify the feasibility of the proposed method, fundamental experiments are performed. We measure the rotational diffusion coefficients of gold nanoparticles, whose diameters are 5 nm, 10 nm and 15 nm, using the developed system. The measured...
TC14 ISMQC 2013
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· 2013
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Yingzhong Tian, Albert Weckenmann, Tino Hausotte, Alexander Schuler, Bin He
Focus variation is an optical contact-free method that allows the measurement of three-dimensional surface metrology using optics with limited depths of field and vertical scanning. It was documented in the ISO 25178-6 first time in 2010. As one method of image capture, it has very crucial influence to get an excellent quality image that some key parameters are selected correctly for different workpiece. Those key parameters are including the exposure time, contrast, filters and so on. In this paper, a few of applications were selected to demonstrate the capabilities of the system using...
TC14 ISMQC 2013
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Giovanni Moroni, Wahyudin P. Syam, Stefano Petrò
Product quality is becoming a main concern in today manufacturing. As such, a dimensional metrology is strictly necessary. High accuracy result while reducing speed in measuring a product has to catch up with the improvement of metrology instrument which can capture many points in less time. Fitting algorithm of points cloud from measurement plays a critical role for the measurement accuracy and speed. In this study, non-linear least-square fitting of circle, sphere and cylinder are addressed without any prior knowledge of their nominal. These geometries have common use in practice, such as...
TC14 ISMQC 2013
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Bogdan Galovskyi, Matthias Flessner, Andreas Loderer, Tino Hausotte
Additive manufacturing becomes more widespread nowadays. Selective laser sintering (SLS) as one of the additive manufacturing methods has a high potential because of a wide range of raw materials. In most cases the accuracy of a SLS process depends on the scanner system of the manufacturing laser beam, parameters of the laser beam and working distance. In order to meet higher quality parameters and to provide manufacturing defects correction a measurement system should be integrated in the process. A measurement system should be developed with considering harsh conditions in the process...
TC14 ISMQC 2013
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Matteo Lancini, Ileana Bodini, Simone Pasinetti, David Vetturi
In order to avoid final product malfunction and to allow for assembly integration, geometric specifications and dimensional tolerances are commonly used in mechanical design. However the feasibility of geometric specification measurement and verification is often neglected and the influence of measurement uncertainty in geometric tolerances evaluation underestimated. The authors propose updated results of a mathematical and numerical model, based on Monte Carlo simulations, developed in order to define a measurability threshold of geometric tolerances in relation to measurement uncertainty...
TC14 ISMQC 2013
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Frank Welkenhuyzen, Denis Indesteege, Bart Boeckmans, Kim Kiekens, Ye Tan, Wim DeWulf, Jean-Pierre Kruth
Computed tomography is already a well established technology in medical and material analysis. Also for dimensional metrology applications, CT is a promising technique for measuring internal and external geometries. Nowadays, most industrial CT scanners, use 120 to 225 kV sources. To scan thicker and more absorbing materials, more power is needed. The Nikon Metrology XT H450 has a range up to 450 kV. However the accuracy of these new, more powerful machines has to be investigated. This accuracy study uses a calibrated reference object and simulations, to get a better understanding of the...
TC14 ISMQC 2013
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Salah H. R. Ali
Roundness is an essential geometrical feature in precision engineering metrology especially for quality control of the rotating parts. Talyrond machine becomes one of the main instruments i n roundness measurement . Talyrond HPR TR-73 fitting software data analysis can contribute significantly o n the measurement accuracy. The error characterization of TR-73 software is very important to find an optimum fitting solution in measurement . The final accuracy of a n object is influence by many different parameters. In this paper, the impact of fitting strategic parameters as computational...
TC14 ISMQC 2013
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J. Sola, F. J. Brosed, J. J. Aguilar
The Guide to the Expression of Uncertainty in Measurement has some limitations, especially for systems with complex mathematical models. In this article, two alternative methods to obtain the measurement uncertainty (Monte-Carlo simulation and calibration based on experimental measurement) are compared. These methods are widely used to calculate the measurement uncertainty of measurement systems. The advantages and disadvantages of these two methods are going to be studied estimating the uncertainty of the flatness measurement using a system based on laser triangulation. The measurement...
TC14 ISMQC 2013
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Stanislaw Adamczak, Pawel Zmarzly, Ireneusz Piotr Chmielik
The paper relates to the problem of an adaptation of V-block methods to waviness measurements of cylindrical surfaces. It presents fundamentals of V-block methods and a principle of their application. V-block methods also called reference methods can be successfully used to measure roundness and waviness deviations of large cylinders utilized in paper industry, shipping industry or in metallurgy. The paper describes a methodology of development of a mathematical model of roundness and waviness measurements by the V-block method. Next, a computer simulation was carried out that aimed at...
TC14 ISMQC 2013
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Rajalingappaa Shanmugamani, Ramamoorthy B
A machine vision approach is required for detection and classification of surface defects such as pitting, watermarks, rough surface and color tonality in zinc coated parts. Such an automated visual inspection scheme involves following steps: image acquisition, defect segmentation, feature extraction and classification. Image acquisition of a part with complex geometry and specular surface depends on the effectiveness of illumination. Various illumination techniques such as dark and diffuse with various incident angles were tested for capturing images with maximum contrast and information....
TC14 ISMQC 2013
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· 2013
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