Re: I need ideas on how to measure prop rpm underwater
Posted:
Sat Jul 09, 2016 8:41 amby fsae99
Mmiscool wrote:Do you need the javascript to make the the gauge widget on the web page or code to capture the rpm of the motor from a sensor of some sort?
The javascript for the gauge widget.
Re: I need ideas on how to measure prop rpm underwater
Posted:
Sun Jul 10, 2016 2:14 pmby Mmiscool
I just need to see about digging that out. There will also need to be some javascript and some web sockets code. There are a few undocumented web sockets functions wich can be used to update custome made javascript widgets like this.
Re: I need ideas on how to measure prop rpm underwater
Posted:
Sun Jul 10, 2016 2:19 pmby NeilCee88
HI, just a thought, would a hall effect sensor be of any use?
example, small rare earth magnet attached (securely) to the prop, hall effect sensor situated in close proximity. This would give a stream of pulses proportional to the rotation speed of the prop. This method is employed in car engines of various manufacturers to monitor the rotational speed of the flywheel.
Hope this gives food for thought.
Re: I need ideas on how to measure prop rpm underwater
Posted:
Mon Jul 11, 2016 12:14 amby trackerj
Why do you want to measure prop speed IN the water? Usually is done inside the boat (or inside the outboard motor case) on the propeller shaft. Any optical encoder or hall sensor can be good for a basic setup.