Subject:
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Re: Sensor Question
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Fri, 9 Apr 1999 03:36:37 GMT
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Original-From:
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Gary Livick <glivick@pacbell.ANTISPAMnet>
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Viewed:
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1146 times
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Andre Philippi wrote:
> Hi,
>
> Just a quick question...What would be most effective ?
>
> An array of sensors (IR or sonar), or a single sensor on a continuously
> rotating base (assume 1 rotation every 2 secs...) ?
>
> Could someone here explain me the main functional differences of the 2
> approaches, please?
I use both and infrared ranging sensor and sonar. I have them both mounted on
rotating bases. If you plan to do some serious work with your application, then
you might find this approach a little difficult. The reason is that if your
robot is moving, and you are recording ranges every few degrees through some
total angle every two seconds, you will introduce errors related to the motion
of the robot, ie; by the time you finish your sweep and examine the range map
you have just built, the robot will be out of position from the earliest
readings by some amount more or less related to speed. I suppose you could
correct for the error with some fancy trig....
>
> Also, since I'm at it...
>
> Recently I've seen a graph containing a typical beam pattern for the polaroid
> 6500 sonar (ftp://wirz.com/Polaroid_Sonar/6500.PDF)... Is the vertical shape
> of the beam patterns the same as the horizontal shape?
The transducer for the sonar is not clocked, and is symmetric, so the pattern is
the same in all directions.
>
Good luck,
Gary Livick
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Message is in Reply To:
 | | Sensor Question
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| Hi, Just a quick question...What would be most effective ? An array of sensors (IR or sonar), or a single sensor on a continuously rotating base (assume 1 rotation every 2 secs...) ? Could someone here explain me the main functional differences of (...) (25 years ago, 9-Apr-99, to lugnet.robotics.handyboard)
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