Water Level Sensing in a Steel Vessel Using A₀ and Quasi-Scholte Waves

Figure 13

Analysis of a received signal using the PWVD: (a) received signal at the water level of 50 mm, (b) the PWVD result in time-frequency domain, and (c) the result of PWVD at 130 kHz.

(a)

(b)

(c)