Szerző szerinti böngészés "Antal, Ákos"

Megjelenítve 1 - 3 (Összesen 3)
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    Computerized evaluation of digital orthopedic moiré pictures
    (2014) Balla, Petra; Manheritz, Gábor; Antal, Ákos
    By the superimposition of two similar periodic structures translated, or rotated relative to each other, a new structure arises with longer periods. This one is called Moiré pattern and it consists of the Moiré fringes. Moiré imaging (used mostly in spinal deformities) is non-contact, fast, and its harmful radiation does not load patients and can be repeated any number of times. For detecting the spinals shape, a software has been implemented in LabVIEW programming environment with several image processing method. The shape of the spine could be sufficiently reproduced using this program. Screening can be established without X-Ray images, which is much faster and healthier for patients.
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    Spineline detection with image evaluation
    (Debreceni Egyetemi Kiadó – Debrecen University Press, 2015-03-18) Balla, Petra; Manhertz, Gábor; Antal, Ákos
    In case of screening and tracking conditions of patients [20] with spinal deformities it is very important to develop an examination method that does not load patinets’ body with harmful radiation. This method is based on the moiré effect. Pictures were taken from patients’ back and information could be obtained about the back’s condition. A computer algorithm is under development that can produce the sagittal line of the spine from moiré images. This program is being tested with Scheuermann disease patients.
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    The effect of air-fuel equivalence ratio change on the vibration components of an internal-combustion engine
    (Debreceni Egyetemi Kiadó – Debrecen University Press, 2015-03-18) Manhertz, Gábor; Antal, Ákos
    Nowadays the automotive industry and the motor development are one of the most dynamically developing industries. One solution to the diagnostic systems providing reliability is the acoustic and vibration measurement system, which can indicate and predict a variety of malfunctions after signal processing. The purpose of this experiment is to analyze the effect of the air-fuel equivalence ratio on the vibration components of an internal-combustion engine (ICE) which is a part of the in question measurement system. In the focus of the experiments are the analysis of the time signal, its spectra, and the power content of the signal. With the increment of the air-fuel ratio the amplitudes of the measured signal and its spectral amplitudes showed a downward trend as the RMS values. In addition, certain frequency components disappeared during the actuation of the ICE with an electromotor, so the characterization of the combustion could be come to the front.