CD Skripsi
Deteksi Kerusakan Pipa Dalam Bentuk Sumbat Dan Bocor Menggunakan Sinyal Suara Dan Empat Mikrofon
ABSTRACT
In this study, a method was developed to detect damage to pipes using
sound signals. The detection of damage to the pipe is done by using a signal
sounds and four microphones. Methods of signal noise is a smart structural
health monitoring that can detect damage at the cost of the more inexpensive.
Excitation the sound is given by using a loudspeaker and the response signal
noise is sampled using four microphones that are connected to the PCOscilloscope
which serves to convert the signal analog results of recording
sound into a signal of digital form of the value of domains of time and then use
a Continuous Wavelet Transform (CWT) to determine the location of the damage
that occurs in the pipe sheath. To detect the location of pipe damage in various
positions of damage, it can be searched by comparing the wavelet coefficient of
the four microphones. Damages are awarded in the form of plug and leaked to
the distance and position of polar vary. From the experimental results obtained
for a single pipe with a leaky condition at a distance of 1 meter with a direction
of 90°, the highest wavelet coefficient occurs at microphone 1 at 0.03024
according to the location of the damage that occurs at an angle of 90 ° and the
lowest occurs at microphone 3 at 0.01884 due to the location of the microphone
this is the most distant from the location of the damage are made.
Keywords: sound signal, leakage, blockage, Continous Wavelet Transform,
wavelet coefficient
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