Subject:
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Re: Spybot studies: seek a world object
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Newsgroups:
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lugnet.robotics.spybotics
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Date:
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Tue, 4 Oct 2005 12:53:42 GMT
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Viewed:
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10237 times
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Hi Daniel,
I can't really help you all that much, but some thoughts on my own experiments
regarding the use of direction/range with the Spybot.
I have found the direction readings to be very poor when the object is in zones
there or anywhere. Once the object enters the here zone, it is reasonably good.
Perhaps this is more a factor of the room I am in (very light coloured flat
walls - a brick room may give better results as you will not get the same IR
reflections).
I have in mind as my next project to develop the spybots into a soccer team
under the rules of RoboCup Junior. To do this however requires the use of the
rear sensor for position tracking on the grey scale floor mat. So I cannot use
the rear sensor for sensing the position of the ball.
Do you have a team of spybots? Maybe you could combine the sensor readings from
both robots and perform something like least squares analysis to determine where
the ball is?
I don't think that Lego would use the light sensor at the rear, because the
normal construction uses this connected to a light tube that, from memory,
points forward. But then I may be wrong.
Which program do you load up to use the directional capabilities? One way to
work out how Lego are doing it, is to watch the program as it is being uploaded
into the Spybot, and then look at the individual bytes codes to see which rom
routines they are using. You can do this using some demo software called Serial
Monitor by www.hhdsoftware.com. As you upload the program to the Spybot, it
will capture the data flowing over the serial port and allow you to see the
actual byte codes being sent to the spybot.
If you would like to email me, I can send you a document I wrote on how to
communicate with the Spybot. I wrote a small program in java that can upload
byte codes direct to the Spybot. It's not much use, but you are welcome to have
it if you want.
Good luck, and keep us all posted on your results.
Allen
In lugnet.robotics.spybotics, Daniel Wittenaar wrote:
> In lugnet.robotics.spybotics, Daniel Wittenaar wrote:
> > In lugnet.robotics.spybotics, Brian B. Alano wrote:
> > > /*
> > > beacon.nqc <<
>
> >
> > Well We are trying to get Spybotics following an IR emitting Ball.. This ball
>
> Nobody who can help us out on this one?? I'm looking for the NQC comando's that
> can control (readout) the sensor on the rear of the spybot.. This can be used as
> told above to determen if the beacon is in front of the spybot.. Or behind the
> spybot.. That all to give the spybot a better left right sense..
>
> The sensor that is in the back is SENSOR_2 And can be used for IR comunication
> trough air.. But i'm not pretty sure how to put things together..
>
> Daniel Wittenaar
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Message is in Reply To:
 | | Re: Spybot studies: seek a world object
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| (...) Nobody who can help us out on this one?? I'm looking for the NQC comando's that can control (readout) the sensor on the rear of the spybot.. This can be used as told above to determen if the beacon is in front of the spybot.. Or behind the (...) (19 years ago, 1-Oct-05, to lugnet.robotics.spybotics)
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