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Electronics => Electronics => Topic started by: jim5192 on November 15, 2011, 08:25:14 AM

Title: Axles/Slip Rings/Angle Sensors
Post by: jim5192 on November 15, 2011, 08:25:14 AM

Hi all. I have a couple questions for those familiar with mechatronic hardware things.

I'm looking for some type of [(angle sensor) + (axle) + (Perhaps a slip ring as well)] all in one. The slip ring is necessarily going to be in the final project that I'm using it for but I could get a slip ring separately.  I was particularly concerned however of how to attach an angle sensor to an axle from two separate.

Regardless I need some way to combine a slip ring (electrical contact through a rotating connection) into an axle along with an angle sensor. How would I go about doing this.

Moreover... I don't even have a good idea for what to buy... what sizes... what tools I'll need to build this thing..

The project is a controlled double pendulum... I'm trying to control it to swing it up and keep it inverted...


here is a rough picture I drew of why I need such a complex [(angle sensor) + (axle) + (Perhaps a slip ring as well)] all in one:

http://s114.photobucket.com/albums/n260/x89codered89x/?action=view&current=11-14-11DoublePendulum.png (http://s114.photobucket.com/albums/n260/x89codered89x/?action=view&current=11-14-11DoublePendulum.png)

Excuse the sloppiness of the drawing... It's a concept drawing only.

My intuition leads me as far as .. "Ball Bearings sound g

Title: Re: Axles/Slip Rings/Angle Sensors
Post by: Soeren on November 15, 2011, 09:33:03 AM

Hi,

Quote from: jim5192 on November 15, 2011, 08:25:14 AM

[...] I was particularly concerned however of how to attach an angle sensor to an axle from two separate.

Regardless I need some way to combine a slip ring (electrical contact through a rotating connection) into an axle along with an angle sensor. How would I go about doing this.

A rotational Hall encoder would work. A magnet on the moveable part and the Hall chip on the other.
They come in various resolutions, but I guess 1024 steps per revolution would be more than enough.

I doubt you'd find something with a slip ring integrated.

Title: Re: Axles/Slip Rings/Angle Sensors
Post by: jim5192 on November 15, 2011, 09:59:03 AM

Do you have a suggestion of a particular model? I was hoping to get an analog sensor in particular. Thanks!

Title: Re: Axles/Slip Rings/Angle Sensors
Post by: Soeren on November 15, 2011, 12:42:59 PM

Hi,

Quote from: jim5192 on November 15, 2011, 09:59:03 AM

Do you have a suggestion of a particular model? I was hoping to get an analog sensor in particular. Thanks!

Don't give away your own Google-fun so easy  ;)

Well, I'd suggest a digital sensor, but you can have analog sine/cosine output.
IChaus.de has got both types.