Fig. 1. Schematic diagram of experimental system

Fig. 2. Experimental setup. (a) Detection devices; (b) bubble generator

Fig. 3. Simulated wake detection experiment results

Fig. 4. Waveforms of wake bubble echoes and signal processing in an indoor pool. (a) The original signal; (b) 10-cycle cumulative signal; (c) 30-cycle cumulative signal; (d) 50-cycle cumulative signal;

Fig. 5. Installation state of lake experimental detection equipment

Fig. 6. Ship wake laser detection experiment in a lake. (a) Actual photo of the experiment; (b) schematic diagram of experiment

Fig. 7. Changes in the amplitude of the laser echo signal under lake conditions

Fig. 8. Waveforms of wake bubble echo detection and signal process in a lake. (a) The original signal; (b) 10-cycle cumulative signal; (c) 50-cycle cumulative signal; (d) 100-cycle cumulative signal; (e) 500-cycle cumulative signal; (f) 1000-cycle cumulative signal