Capturing raw Ping module return with ADC?
Rayman
Posts: 14,162
Just got this Ping module with servo today...·
I'm contemplating capturing the return signal directly with my ADC object.· (But haven't really thought it through yet...).
I think it would could be neat to display a radar-like image while the servo scans around...
Perhaps the sonic burst can actually penetrate/go around some objects, allowing you to see behind them?
After looking at it a bit, I think I could have saved money and just got some transducers and interfaced them directly with the Propeller...
Here's another crazy idea:· Phased array of transducers.· I think if I put 10 or so of them in a row, the angular resolution (at least in one dimension) would improve a lot.· And, if one were to individually control them, you could eliminate the servo and scan by adjusting the phase on the array...
·
I'm contemplating capturing the return signal directly with my ADC object.· (But haven't really thought it through yet...).
I think it would could be neat to display a radar-like image while the servo scans around...
Perhaps the sonic burst can actually penetrate/go around some objects, allowing you to see behind them?
After looking at it a bit, I think I could have saved money and just got some transducers and interfaced them directly with the Propeller...
Here's another crazy idea:· Phased array of transducers.· I think if I put 10 or so of them in a row, the angular resolution (at least in one dimension) would improve a lot.· And, if one were to individually control them, you could eliminate the servo and scan by adjusting the phase on the array...
·
Comments
Ping is seems accurate for a couple of meters.
Shouldn't you be counting the echo time though rather than measuring voltage ?
Six pings in a hexagon would buy you 45 degrees all around.
Wonder what the sweep resolution of the mechanical alternative would be.
Guess it depends on the rotation speed and cont-rotation one is not so fast.
Perhaps a DC motor with a low duty-cycle pwm and transistor would be better ?
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