Best Sensor for Unlimited Rotation Swerve

[Mike Bortfeldt]

Joe,

I think the "No gaps in sensor feedback" relates to the use of some potentiometers (and other sensors) like this one. While they are continuous rotation, electrically they have a gap in the signal for about 20 degrees of rotation.

Mike

[Joe Johnson]

Originally Posted by Mike Bortfeldt

Joe,

I think the "No gaps in sensor feedback" relates to the use of some potentiometers (and other sensors) like this one. While they are continuous rotation, electrically they have a gap in the signal for about 20 degrees of rotation.

Mike

Bleck! I threw a a little as I thought of someone going to all the trouble of making a swerve with infinite rotation and then using a sensor with a 20 degree no signal zone.

How's that going to end well?

Dr. Joe J.

[PAR_WIG1350]

Originally Posted by Joe Johnson

Bleck! I threw a a little as I thought of someone going to all the trouble of making a swerve with infinite rotation and then using a sensor with a 20 degree no signal zone.

How's that going to end well?

Dr. Joe J.

I have been working on a background project with a sensor that gives a ~7 degree gap, which I considered to be quite bad. 20 degrees is just pure evil!

[teku14]

https://pixhawk.org/modules/px4flow

We're experimenting with this in the off-season... please critique on this idea

[Andrew Schreiber]

Originally Posted by teku14

https://pixhawk.org/modules/px4flow

We're experimenting with this in the off-season... please critique on this idea

I like the idea, I'd be curious how you get around the issues with it's max velocity. It's designed for aerial vehicles so the camera expects to have a long distance to the ground. To get data for 14 fps you'd need to mount it 18 inches from the ground.

4/(1/400)*18*.0254/(.004/.000024)*3.28 = 14.4

[teku14]

Originally Posted by Andrew Schreiber

I like the idea, I'd be curious how you get around the issues with it's max velocity. It's designed for aerial vehicles so the camera expects to have a long distance to the ground. To get data for 14 fps you'd need to mount it 18 inches from the ground.

4/(1/400)*18*.0254/(.004/.000024)*3.28 = 14.4

Correct me if I'm wrong however we expected to mount this approximately 5.5 inches or 0.139 meters above the ground since that is the clearance of the our swerve modules.

- Also we have purchased an additional M12 lens to swap out which is adjustable in focal length from 2.8 to 16 mm

Assuming the minimum of 2.8mm I was thinking that

4/(1/400)*0.139/(0.0028/0.000024) = 1.9 m/s or 6.2 ft/s

Now that may not be the max speed the robot is capable of but we feel that it is an acceptable speed for accurate autonomous navigation which is what we are trying first. So it really doesn't fit into the whole theme of being an all purpose swerve sensor, but the technology used is very intriguing and our key problem with swerve is more of navigating in autonomous.

PS. Hopper Buddies for life

[Andrew Schreiber]

Originally Posted by teku14

Correct me if I'm wrong however we expected to mount this approximately 5.5 inches or 0.139 meters above the ground since that is the clearance of the our swerve modules.

- Also we have purchased an additional M12 lens to swap out which is adjustable in focal length from 2.8 to 16 mm

Assuming the minimum of 2.8mm I was thinking that

4/(1/400)*0.139/(0.0028/0.000024) = 1.9 m/s or 6.2 ft/s

Now that may not be the max speed the robot is capable of but we feel that it is an acceptable speed for accurate autonomous navigation which is what we are trying first. So it really doesn't fit into the whole theme of being an all purpose swerve sensor, but the technology used is very intriguing and our key problem with swerve is more of navigating in autonomous.

PS. Hopper Buddies for life

Math checks out, let me know how it works.