Speed of sound as a function of temperature for ultrasonic propagation in soybean oil

8th Brazilian Congress on Metrology

Oliveira, P.A.^1 ; Silva, R.M.B.^1 ; Morais, G.C.^1 ; Alvarenga, A.V.^1 ; Costa-Félix, R.P.B.^1

Laboratory of Ultrasound, National Institute of Metrology, Quality and Technology (Inmetro), Av. Nossa Sra das Graças 50, Duque de Caxias

RJ

25250-020, Brazil^1

关键词: Characteristic functions;    Increasing temperatures;    Measurement uncertainty;    Pulse-echo technique;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/733/1/012040/pdf
DOI  :  10.1088/1742-6596/733/1/012040

来源: IOP

【 摘 要 】

Ultrasound has been used for characterization of liquid in several productive sectors and research. This work presents the studied about the behavior of the speed of sound in soybean oil with increasing temperature. The pulse echo technique allowed observing that the speed of sound decreases linearly with increasing temperature in the range 20 to 50 °C at 1 MHz. As result, a characteristic function capable to reproduce the speed of sound behavior in soybean oil, as a function of temperature was established, with the respective measurement uncertainty.