Smoothen readout of a Ping Sensor

Matthias09 · 2009-08-27 03:50

Hey guys,

I am using a Ping sensor (with SX/B) to detect a ball (actually two sensors, one of each side of the beam where the ball is rolling in, 2ft long). When in debugging mode and polling, I can see, that the results of the sensor are varying. To get more reliable results, I want to smooth them, e.g. by collecting several values and creating an average value.

I think I read a thread in this forum about it a couple of days ago, but cannot find it anymore (searched 15 min). So can you either give me a link to this thread or provide me with some 'smooth' [noparse]:)[/noparse] ideas?

Thanks guys!

Matthias

Phil Pilgrim (PhiPi) · 2009-08-27 03:57

Here's a thread that might help: http://forums.parallax.com/showthread.php?p=635942.

-Phil

SRLM · 2009-08-27 10:38

And here is another version: http://forums.parallax.com/showthread.php?p=759589

Matthias09 · 2009-08-27 18:06

Thanks guys!

That was what I was looking for!

Matthias

photomankc · 2009-08-27 18:48

Awesome. I was right on top of doing Beau's solution but I wasn't subtracting the average and I abandoned that and went to a slow, moving average filter with an array and index, Beau's will be a much tighter piece of code.

Beau Schwabe · 2009-08-28 18:50

Matthias09,

I hope that you can use something out of that link

photomankc,

Thanks, glad you can use that code

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Beau Schwabe

IC Layout Engineer
Parallax, Inc.

Smoothen readout of a Ping Sensor

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