Subject:
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Re: Nic_1
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Newsgroups:
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lugnet.robotics
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Date:
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Fri, 10 Feb 2006 15:40:21 GMT
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Viewed:
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1941 times
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In lugnet.robotics, Claude Baumann wrote:
> If you want to see Nic_1, a sound following robot, go to
> http://www.convict.lu/Jeunes/ultimate_stuff/Nic_1.htm
>
> Nic_1 runs a program on the RCX that first samples two RCX sensor input ports at
> 36000 Hz (there is no mistake here !) to receive 300 samples from both
> microphone channels. Then the program operates a fast and simplified
> cross-correlation, yielding the phase-lag between both audio-signals. This value
> is used to indicate the direction towards which Nic_1 is supposed to turn. The
> program prunes erroneous values that might appear due to room reverberation. The
> program was written with Ultimate ROBOLAB.
>
> The video shows Nic_1 whilst tracking radio-music. It also could be a music
> instrument or a human voice.
>
> Enjoy.
Hey that's pretty amazing for the standard RCX firmware. I guess calculation
time doesn't really matter though. I'm a graduate EE taking estimation theory
this semester so I'll keep this close to my heart. :-p
I can't wait to try 2 mics on the new NXT! Ugh. August. I already have my
money saved up.
Added it to my blog. Not that I get much traffic to the front page.
http://superpositioned.com
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Message has 2 Replies:
 | | Re: Nic_1
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| (...) Ultimate ROBOLAB is an extension to normal ROBOLAB to produce our own stand-alone firmware. (19 years ago, 10-Feb-06, to lugnet.robotics)
| | | Re: Nic_1
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| (...) Calculation time is very short -regarded the H8 limits- On the video and the program diagram you can conclude that the robot turns about every 2 seconds. Deduce the 0.8 sec pause and you have something around 1.2 seconds for a (...) (19 years ago, 10-Feb-06, to lugnet.robotics)
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Message is in Reply To:
| | Nic_1
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| If you want to see Nic_1, a sound following robot, go to (URL) runs a program on the RCX that first samples two RCX sensor input ports at 36000 Hz (there is no mistake here !) to receive 300 samples from both microphone channels. Then the program (...) (19 years ago, 10-Feb-06, to lugnet.robotics)
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