Characterizing acoustic impedance of several saline solution utilizing range finder acoustic sensor

Gunawan, Agus; Dewantara, Bima Sena Bayu; Santoso, Taruma; Wicaksono, I. D.; Prastika, Edo Bagus; Prianto, Chandra Edy

doi:10.1109/elecsym.2017.8240405

Cited by 2 publications

(2 citation statements)

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“…Because in the previous research which also developed a conversion curve from the echo signal [1][2][3][4][5][6][7][8][9], the pre-processing method of the echo signal was not discussed in detail. It is either because the profile of the received echo signal was already good or because a pre-processing of the signal is not required.…”

Section: Originalitymentioning

confidence: 99%

“…In ultrasound measurement, one of the method to calculate the acoustic impedance value is by using a conversion curve, which converts the value of peak-to-peak or the Root Mean Square (RMS) of an echo signal into acoustic impedance [1][2][3][4][5][6][7][8][9]. However, the RMS and peak-to-peak value cannot be measured directly because sometimes the received echo signal is contained with noise which frequency is higher than the echo frequency.…”

Section: Introductionmentioning

confidence: 99%

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The Enhancement of 3 MHz Ultrasonic Echo Signal for Conversion Curve Development for Acoustic Impedance Estimation by Using Wavelet Transform

Prastika

Gunawan

Dewantara

et al. 2018

emitter

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Ultrasonic technology has already been applied for many applications. Most of them are mainly used for object measurement. Some techniques have been widely applied to particular measurement by utilizing a very specific component. In this research, the previous technique to develop a conversion curve to obtain the acoustic impedance of the target is adopted. Then, a 3 MHz concave shaped ultrasonic transducer for measuring liquids is proposed and a confirmation is needed to confirm if the system is correct. Therefore, several saline solutions with some known properties are used. A low voltage of 10 Volt pulse is sent to trigger the transducer. The ultrasonic wave is transmitted through the multilayered mediums, which is pure water, clear acrylic, and the target. The echo from the interface between the acrylic and the target is then received by the same transducer. Some parameters such as peak and Root Mean Square (RMS) are used to develop the conversion curve. A peak detection and comparison between the original echo and the processed one by using Wavelet transform is performed. Some analysis of the echo signal by using multiresolution and timefrequency analysis are also proposed. The result obtained from the measurement is then compared to the theoretical calculation. Based on the result, in terms of developing the conversion curve, only the RMS value of the Undecimated Wavelet Transform (UWT) which has the closest trend to the result of the calculation, with the mean percentage error of 0.65512%, which is the smallest value among all parameters.

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