I work on a AUV and we have been thinking about implementing a sonar on the vehicle. Ideally we would like to use a multi beam forward looking imaging sonar, but seeing as those are a little pricy, we are looking into side scan or a sector scan unit. While looking at these units I ran into many “Mul…

Take a look at these links: http://www.furuno.com/special/en/sonar/index.html http://oceanservice.noaa.gov/facts/sonar.html

Thank you that was very helpful, so side scan sonars measure the intensity of the reflected signals and are useful in identifying objects to the left and right of the vehicle on the sea floor, where as MBES generate ranges to the sea floor. At least thats what i got out of the NOAA pages. My follow…

Frankly any SONAR is capable of providing you distance to an object. It all depends on the software package that comes with the unit. I have used military SONAR but I don’t have no experience with commerical units but they all work the same. The distance is just a function of the velocity of soun…

Here is another way to think about it. If you have a single transducer that generates a narrow beam, you can point it in any direction and measure the distance to objects that generate a return signal or echo (e.g., the bottom, fish, wrecks, ships, etc.). If it points down, you have a “depth finder”…

Right, fundamentally all sonars work by measuring a combination of reflected sound intensity and time of flight. My concern is that there is something in the software that would cause a MBES not work in a forward looking capacity. For instance picotech makes both a Forward looking sonar and a MBES…

SInce you are talking about being in really shallow water … I would be more worried about just scattering and reflection from the bottom. Since you are talking about operating in pools … the reverberation could drive the equipment crazy too. Stupid question time. If you are operating in basically…

Reverberation is something that we are concerned about, we know that some of our competitors successfully use tritech microns, and blueview P series units. I have some concerns stepping away to the lesser known brands. We briefly considered attempting to make our own. Unfortunately we are an underg…

Pierson the passive system should be the easiest thing in the World to do in comparison to what you are trying to do for active. To help my old fart brain out … just what is the objective? I assume from the way you are talking that you are running an course with objects that you have to avoid and …

@Harold: We want to use a sonar to supplement our vision, use the sonar to confirm objects and determine the distance we are away from the objects we have to manipulate. For our passive sonar array your are correct by having 3 tightly spaced hydrophones we plan on analyzing the phase on arrival, to …

MBES/sonar question

General Discussion

kmulmer (Kevin) November 4, 2015, 9:21am 10

Pierson - I assume that you are talking about RoboSub? You might want to check out this Forum thread:

https://discuss.bluerobotics.com/t/low-cost-sonar

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