The left picture above is the original picture, and the right one is circled by a red circle. In the red circle,
there are peaks with regular spacing, which are regularly distributed. This is a representative
electromagnetic interference caused by the inverter. Here the two lines below the baseline have
values, but these values are all caused by electromagnetic interference and have no meaning.
The left picture in the above figure is the original picture, and the right picture is the one I circled in red.
The box in the right picture selects the interference waveform. The ellipse selects the real echo. The
interference waveform is much higher than the real echo, Ultrasound can not be identified.
Figure 9 is more interesting. The oval circle is the real reflected wave, and the square circle is the
interference wave from the inverter. Although there is interference from the inverter, the reflected
signal strength on the water surface is significantly higher than the interference signal from the
inverter. Is the field test data correct.
Figure 8 Echo graph of inverter interference
Figure 9 Echo graph of inverter interference
Figure 10 Echo pattern of strong interference
053
EN
7
0
1
7
8
7
2
.0
6
0
9
/2
0
1
8
C
H
/E
N
How To determine The cause Of a Field Failure Based On The Echo Graph
