What sensors are used to detect the hot LED lights on the FRC field?

[RaxusPrime]

Originally Posted by brennonbrimhall

Confirmed in Q&A #55.

My mind=blown

[safiq10]

Originally Posted by inkling16

sensor we are using: human eyeballs...
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By using a Kinect on the driver's side during AUTO.

Now the question is, how many posts there will be before someone tells me that this is illegal. My guess: 4

This is intresting? could you explain this? we might just take this idea but I want to fully understand it before we use it? Would it be similar to the hybrid mode we had in 2012?

[Travis Hoffman]

Originally Posted by Lightfoot26

We are using a photoelectric IR sensor. We will dead reckon before the match, it acts as a digital input and sends true when it sees the retro reflective tape. False if otherwise, process of elimination... If False then 1 goal is hot, if true, the other is hot. Simple elegant solution... If we don't have to use vision... we find every way not to. although some years we can't get around it... (i.e. 2012).

^^^ THIS.

[Whippet]

Originally Posted by brennonbrimhall

Confirmed in Q&A #55.

I never thought I would see my q&a question referenced so many times throughout the build season, especially since we're not even planning on taking advantage of it for now...

[Caleb Sykes]

Originally Posted by safiq10

This is intresting? could you explain this? we might just take this idea but I want to fully understand it before we use it? Would it be similar to the hybrid mode we had in 2012?

Exactly the same as hybrid mode in 2012. Plus, all of the code from that year is still incorporated in WPILib. Literally the only difference is that you have to provide your own Kinect instead of having a set station for it.

[z_beeblebrox]

For the people who said they were using a photoelectric sensor, what model are you using? How has it been working for you. My team is considering adding one and I'm curious about where to start.

[yash101]

AXIS camera with OpenCV. we also get distance measurements and goal coordinates. It works well!

[Lightfoot26]

Originally Posted by z_beeblebrox

For the people who said they were using a photoelectric sensor, what model are you using? How has it been working for you. My team is considering adding one and I'm curious about where to start.

these are working great!

[tgross35]

It looks like most options have been covered, but I'll throw in what we use. The retro-reflective tape will direct a reflected light directly back to its source, rather than at an angle like with a mirror, so this is how most teams (including ours) work it out. We use the Axis camera (available on AndyMark) with a LED ring around it (we got it here and it works well http://www.superbrightleds.com/morei...ent-lights/49/.) Just wire the camera into the 5V built-in wago on the PDB and hook the ethernet up to the D-LINK. We hooked the LEDs up to a spike with a 5A breaker that would turn on when the robot is enabled. From there, the programmers can use vision processing to detect the location of the robot and which goal is hot based on the proportion of the rectangle and if a horizontal rectangle is visible or not. Good luck!

[geomapguy]

We're using the kinect and it's working really good

[Lightfoot26]

Originally Posted by Travis Hoffman

^^^ THIS.

I hope that's good!?...haha... If you have any questions feel free to ask!

[Travis Hoffman]

Originally Posted by Lightfoot26

I hope that's good!?...haha... If you have any questions feel free to ask!

It is.

Also, garage door opener websites are your friend.

[NotInControl]

Originally Posted by tgross35

Just wire the camera into the 5V built-in wago on the PDB and hook the ethernet up to the D-LINK. We hooked the LEDs up to a spike with a 5A breaker that would turn on when the robot is enabled. From there, the programmers can use vision processing to detect the location

How was this electrical set up working for you?

Am I correct in assuming, you are running the LEDs at 12V, off a spike, which is plugged into the regular (non-regulated) wago terminals of the Power Distro Board.

Was curious to see how well this was working for you and if your LED voltage dropped out during use of the Robot. If no regulator is inline, at the points when you drive, the voltage to your light rings would drop and loose intensity, which would reduce lumens, and reduce the quality of returned light from the retro-reflective tape.



-Kevin

[NotInControl]

Originally Posted by Lightfoot26

these are working great!

Still curious about how these sensors, IR/Laser, sensors are being employed in this application.

How are teams determining a hot goal is present without a vision system, if two separate objects need to be seen (vertical and horizontal), and one object will always be in view (vertical)?

-Kevin

[Alan Anderson]

Originally Posted by NotInControl

How are teams determining a hot goal is present without a vision system, if two separate objects need to be seen (vertical and horizontal), and one object will always be in view (vertical)?

You only need to check for the presence or absence of reflections from the horizontal target. A Class 1 laser sensor can be pointed at the dynamic vision target before the match begins, and it'll tell you whether or not the target is still there a moment after autonomous mode starts.