Re: IR detector system, biasing of photo diode

On 10/27/2024 7:33 AM, Klaus Vestergaard Kragelund wrote:

On 27-10-2024 14:05, Don Y wrote:

On 10/26/2024 5:19 PM, Klaus Vestergaard Kragelund wrote:

I am working on an IR detector that will guide a robot into a docking station.
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A IR transmitter on the docking station transmits a beam, and 2 IR detectors on the robot detects the beam and lets the robot navigate towards the target. The working distance is a couple of meters.

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Can the robot ALWAYS see the docking station?  What happens if an
obstacle (wall?) comes between the two?

 Yes, we have RTK GPS to position it within a cm at a location right in front of the docking, 2 meters away.

Then why can't you move to the GPS location of the dock with the
same degree of accuracy?

Can either device (robot/dock) ever slip out of the shared plane?

 No, should be locked

"Outdoors" (from below).  Presumably on pavement/concrete (not a "lawn")
that wouldn't have dips and bumps?

Can the docking station be moved, from day to day, site to site, etc.?

 That is fixed
 

Is the arena indoors?

 Outdoors
>

I have become particularly fond of using cameras to interface with
the real world.  Of course, it requires a bit more horsepower but
seems to be able to overcome all of the issues that have crept up...

>
That's also a solution we have been working on. The Worx Vision uses that
 https://eu.worx.com/da-dk/landroid/vision-technology/
 That is for a future version. Cameras can also be blinded, lenses needs to be cleaned etc

Yes, but a camera can be "queried" to verify that it is functioning
correctly:  "What do you see?  Is it THIS?"
I test my cameras by storing previously viewed scenes to verify they
are still "reasonably" intact.  Ideally, I would move something into
the field of view but that requires additional capabilities.
You, however, could move the robot (assuming IT has the eyes) and
verify that the scene changes accordingly.