Hello! I’ve been working on an autonomous sonar boat for the past few months. I’m trying to use the boat to map lakes and find targets to dive on with my ROV. I got the boat up and running very quickly with ardupilot Rover. However once I added the sonar I immediately ran into issues with interference in the sonar anytime the motors were running. I am now on my third motor configuration. I have tried two sets of no name Chinese branded brushless thruster motors. And I have now tried above water brushless motors connected to flex cables and spinning props under the water line. All of these configurations have produced interference in the sonar. I have done a large number of tests. I’m sure that the wiring is not the source for the interference. The sonar runs on its own battery with nothing else connected. My tests have shown that any thruster motors even without props generate noise when in the water with the transducer. In the case of the above water motors. It seems the props are generating noise thats still picked up by the transducer.
So my question now is. If I spend the money on a set of t200 thrusters which should be the highest quality of motors I will have tried. Will that cure the interference? Hoping someone else has had experience with side scan and these thrusters and can advise. Thank you!