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Bearing by th new Hitechnic IR Seeker 2 
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Ford Prefect
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Post Bearing by th new Hitechnic IR Seeker 2
hi,
does anybody know if the new Hitechnic IR seeker 2 is able to detect and distinguish 3 or 4 IR beacons,
is it able to get bearings within 1° accuracy,
is it able to learn beacon IDs (e.g. ~~~.~~~.~~~ or ~.~.~.~. or ~~.~~.~~.~~ with 20 impulses each second),
or can it just read professional remote control codes?

Code:
         y
         ^         
         |
         |        (1)
         |           .
         |             .
         |               .
         |                 .   
         |                 nXt   
         |                .    .
         |             .          .
         |           .               .
         |        (2)                 (3)
         |- - - - - - - - - - - - - - - - - - - - - -> x

beacons (1), (2), (3) in an orthogonal vector room

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Ford Prefect

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Sat Jul 25, 2009 1:08 pm
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mightor
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Post Re: Bearing by th new Hitechnic IR Seeker 2
Ford Prefect wrote:
does anybody know if the new Hitechnic IR seeker 2 is able to detect and distinguish 3 or 4 IR beacons,

No, it can detect a 600 and a 1200Hz signal and an unmodulated signal.

Quote:
is it able to get bearings within 1° accuracy,

No, it divides its field of vision in 9 slices. The signal is coming from one slice or another or not at all.
Image

Quote:
is it able to learn beacon IDs (e.g. ~~~.~~~.~~~ or ~.~.~.~. or ~~.~~.~~.~~ with 20 impulses each second),

Nope.

Quote:
or can it just read professional remote control codes?

Nope. What you are looking for is an RC5 signal decoder.

The IR Seeker is mainly intended for RoboSoccer where there is generally only one IR beacon, namely the ball. For more information check out the product page: http://www.hitechnic.com/cgi-bin/commer ... ey=NSK1042

Regards,
Xander

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Sat Jul 25, 2009 2:20 pm
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Ford Prefect
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Post Re: Bearing by th new Hitechnic IR Seeker 2
Quote:
Nope. What you are looking for is an RC5 signal decoder.

grmmppfflmpff :eek:
thx anyway :roll:

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Ford Prefect

Never purchase release 1.x ! (ancient programmer's wisdom)
"Don't argue with idiots. They'll drag you down to their level and then beat you with experience."
Sat Jul 25, 2009 3:01 pm
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Atlantisbase
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Post Re: Bearing by th new Hitechnic IR Seeker 2
mightor wrote:
No, it can detect a 600 and a 1200Hz signal and an unmodulated signal.

Xander, are you sure about the unmodulated part?

I checked the link you provided,
mightor wrote:
Product page: http://www.hitechnic.com/cgi-bin/commer ... ey=NSK1042
, and there it says that the sensor can detect modulated signals:
NXT IRSeeker V2 Product Page wrote:
The IRSeeker V2 has enhanced modes that detect modulated IR signals...

Of course they could be talking about something completely different from what Ford was asking, in which case never mind.

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Code:
using namespace System;
using namespace Genius;
using namespace Personality;
public ref class Nerd : Geek, IAnserable
{
    Geek::Type brainMode = Geek::Type::Programmer;
}
Sun Jul 26, 2009 1:33 pm
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mightor
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Post Re: Bearing by th new Hitechnic IR Seeker 2
Atlantisbase wrote:
mightor wrote:
No, it can detect a 600 and a 1200Hz signal and an unmodulated signal.

Xander, are you sure about the unmodulated part?

Yeah, very sure. It can detect unmodulated signals (DC) and modulated signals (AC). The unmodulated signal would be like a constant IR light source. The modulated signal is a 600 or 1200Hz signal on a 38KHz carrier frequency.

Quote:
NXT IRSeeker V2 Product Page wrote:
The IRSeeker V2 has enhanced modes that detect modulated IR signals...

Of course they could be talking about something completely different from what Ford was asking, in which case never mind.

What Ford wants is a way to distinguish between multiple beacons. In other words, each beacon would emit a unique ID over IR and the sensor would then figure out the direction of these signals and use them to triangulate its position. There is currently no sensor made by HiTechnic or Mindsensors that can do this.

Regards,
Xander

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Sun Jul 26, 2009 1:49 pm
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Atlantisbase
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Post Re: Bearing by th new Hitechnic IR Seeker 2
Sorry, don't mind me. Just pointing out the obvious

_________________
Captain, Head programmer, School of the Arts, Silverbots Robtics Team #2890
Code:
using namespace System;
using namespace Genius;
using namespace Personality;
public ref class Nerd : Geek, IAnserable
{
    Geek::Type brainMode = Geek::Type::Programmer;
}
Sun Jul 26, 2009 1:57 pm
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