ceolacanth
Jr. Member
- Nov 20, 2004
- 37
- 0
Gold fever I think Cornelius is referring to a transducer mounted to provide a side scan imaging capability and as he correctly points out more dollars spent is in relation to the picture/ image quality. This you can mount or Tow. (Not the case with a magnetometer unless you have specifically designed your ROV without ferrous fittings)
If you are using the transducer to provide a picture image then it must be mounted externally and through hull pressure fittings used to connect Transducer to the electronics module. Be careful here of depth limitations on both cable (supplied with transducer and transducer itself) most transducers are solid poured casings and should give you a few hundred feet but the cables supplied with unit may not. The supplied cables may also pose a problem with splicing in the waterproof connector if you are using a scotch type casting then ensure you allow at least 6? each side of joint. (I know this leaves a large rigid ?donkey dick? type fitting but it prevents leakage.)
If you want to just use the echo sounder as an altimeter (facing downwards for depth) or as an obstacle avoidance (forward facing) then a simple digital display will do. You can mount the whole unit inside a pressure housing with one side having a clear lexan endcap (some u/w flashlights will work here) and positioned so that the camera can see the display .The transducer end must be epoxied into the base and just follow the procedures for ?shooting through fiberglass hulls ? as outlined in most owners manuals. NOTE: If you are using this in a deep water housing where the delrin end caps are over 1? thick you need to calibrate the transducer once installed.
If you are using the transducer to provide a picture image then it must be mounted externally and through hull pressure fittings used to connect Transducer to the electronics module. Be careful here of depth limitations on both cable (supplied with transducer and transducer itself) most transducers are solid poured casings and should give you a few hundred feet but the cables supplied with unit may not. The supplied cables may also pose a problem with splicing in the waterproof connector if you are using a scotch type casting then ensure you allow at least 6? each side of joint. (I know this leaves a large rigid ?donkey dick? type fitting but it prevents leakage.)
If you want to just use the echo sounder as an altimeter (facing downwards for depth) or as an obstacle avoidance (forward facing) then a simple digital display will do. You can mount the whole unit inside a pressure housing with one side having a clear lexan endcap (some u/w flashlights will work here) and positioned so that the camera can see the display .The transducer end must be epoxied into the base and just follow the procedures for ?shooting through fiberglass hulls ? as outlined in most owners manuals. NOTE: If you are using this in a deep water housing where the delrin end caps are over 1? thick you need to calibrate the transducer once installed.
To look forward you need to cnstantly pan a forward angleor use a multible beams. I dont think such a solution can be made with standard fisfinder transducers.
