Title :
Acoustic velocity measurement in seawater based on phase difference of signal
Author :
Jian, Chen ; Shen, Zhao ; Zhigang, Huang ; Chunjie, Qiao
Author_Institution :
Coll. of Mechatron. Eng. & Autom., Nat. Univ. of Defense Technol., Changsha, China
Abstract :
In this paper, FFT theory is used for realizing the phase measurement of signals. A new approach of acoustic velocity measurement in seawater based on phase difference is proposed. To deal with the phase ambiguity, our current study found an improved approach, which is based on two-frequency signal. The experiment compares the measurement results of phase difference with time difference. The results verify the effectiveness of the phase difference acoustic velocity measurement.
Keywords :
acoustic wave velocity measurement; fast Fourier transforms; seawater; FFT theory; acoustic velocity measurement; phase ambiguity; seawater; signal phase difference; signal phase measurement; two-frequency signal; Acoustic measurements; Acoustics; Phase measurement; Sea measurements; Temperature measurement; Transducers; Velocity measurement; Acoustic velocity measurement; Phase difference; Precision; Time difference; Two-frequency signal;
Conference_Titel :
Electronic Measurement & Instruments (ICEMI), 2011 10th International Conference on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4244-8158-3
DOI :
10.1109/ICEMI.2011.6037883
