CD Tesis

Analisis Sinyal Ultrasonic Non-Destructive Testing Untuk Deteksi Cacat Pada Material Berbasis Metode Komputasi Simulink Matlab Mathematica

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This purpose of this research was to analyze the output signal of
Ultrasonic Non-Destructive Testing (NDT-UT) for defect detection in materials
based on the Simulink Matlab Mathematica computation method and reconstruct
it based on the existing images and quantities to produced in 3D. The results of
this processing are expected to clearly see the shape and location of the defects in
3D. This research is limited by using material defect data that has been obtained
from existing research and only using Matlab simulation with the Simulink-
Mathematica modeling program.
This research was conducted computationally using Matlab software with
the Mathematica-Simulink modeling program. This research is limited to using
material defect data that has been obtained from existing research. These data
are used as secondary data for this research. The tools and materials used in this
study were Leptop Hp 1000-1441TU, Matlab-Simulink software, Wolfram
Mathematica, NDT-UT signal data. NDT-UT data were analyzed using the
Simulink-Matlab application to produced the waveform, wave spectrum and
thermographic image were obtained through the FFT (Fast Furious Transform)
filter. Furthermore, the results of the analysis are reprocessed using Mathematica
by reconstructing and removing existing noise using a Gaussian filter so that the
display is produced in 3D.
The results of the NDT-UT reflected signal analysis for the detection of
defects in the material obtained a decrease in the maximum height of the wave
from 1 a.u to 0.55 a.u and the sample frequency distribution decreased from 25
dB to -75 dB which resulted in discontinuity. The result in the form of a
thermographic image shows the distribution of red (R), green (G), and blue (B)
images, with red color indicating the highest temperature indicating that there is
a defect in the area according to the sample used. The results of reconstruction
using Mathematica obtained a 3D image of each sample. The percentage
inequality of reflected waves experimentally and computationally is 10%. The
results of comparing the sinusiodal output of the NDT-UT signal to air and steel,
the percentage inequality that occurs is between 0% -42% depending on the
complexity of the defect.
Key words : Defect, NDT-UT, Image, Simulink-Matlab, Wolfram Mathematica

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Ketersediaan

Informasi Detail

Judul Seri

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No. Panggil

10 17. 220 (0023)

Penerbit

Pekanbaru : Universitas Riau – Pascasarjana – Tesis Fisika., 2020

Deskripsi Fisik

xiii, 78 hlm.; ill.: 29 cm

Bahasa

Indonesia

ISBN/ISSN

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Klasifikasi

10 17. 220 (0023)

Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

FISIKA

Info Detail Spesifik

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Pernyataan Tanggungjawab

FATAH

Versi lain/terkait

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