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Autonomous motion sensing laser turret for object path tracking

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HazzWold 1993
Sun Feb 27 2011, 11:54PM Print
HazzWold 1993 Registered Member #2563 Joined: Mon Dec 21 2009, 10:17AM
Location: Australia
Posts: 280
Does anyone here have any info on, or any tips towards making a turret similiar to this one Link2 but instead of controling it, having it running autonomously via a motion tracker? i would like to build one to track objects through a specific area with a 50mW green laser module, and record the path by having a camera running a long exposure of the target area.
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big5824
Tue Mar 01 2011, 12:28PM
big5824 Registered Member #1687 Joined: Tue Sept 09 2008, 08:47PM
Location: UK, Darlington
Posts: 240
i did it using a pc sending serial data to a pic, which in turn controlled two servos for the turret, with a program based on this getting me the coordinates to aim at.
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Bjørn
Tue Mar 01 2011, 03:04PM
Bjørn Registered Member #27 Joined: Fri Feb 03 2006, 02:20AM
Location: Hyperborea
Posts: 2058
A 50 mW green module is not really safe enough for such use.

Why would you want to record the path? If you have a motion tracker the path is known so you don't need the laser or the camera.
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radhoo
Tue Mar 01 2011, 04:48PM
radhoo Registered Member #1938 Joined: Sun Jan 25 2009, 12:44PM
Location: Romania
Posts: 701
I've implemented a simple motion detection algorithm that works well, for a different purpose, see here:
Link2

Add that to this laser-spot following robot:
Link2

And you might get what you need.
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Patrick
Tue Mar 01 2011, 05:42PM
Patrick Registered Member #2431 Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
Bjørn wrote ...

A 50 mW green module is not really safe enough for such use.

Why would you want to record the path? If you have a motion tracker the path is known so you don't need the laser or the camera.
What kind of laser or power would be less* dangerous, Bjorn?

*(Notice I did not say SAFE, but LESS dangerous.)
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Bjørn
Tue Mar 01 2011, 06:59PM
Bjørn Registered Member #27 Joined: Fri Feb 03 2006, 02:20AM
Location: Hyperborea
Posts: 2058
Here are some details about laser safety: Link2

Many cheap green laser modules also spews out a huge amounts of infrared light that can be very dangerous at short range.
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Patrick
Tue Mar 01 2011, 10:59PM
Patrick Registered Member #2431 Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
Bjørn wrote ...

Here are some details about laser safety: Link2

Many cheap green laser modules also spews out a huge amounts of infrared light that can be very dangerous at short range.
Excellent.
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HazzWold 1993
Wed Mar 02 2011, 12:13AM
HazzWold 1993 Registered Member #2563 Joined: Mon Dec 21 2009, 10:17AM
Location: Australia
Posts: 280
The particular module i have spare is IR filtered and is the lowest mW i have available. As for my purpose 200mW would be over the top. This was just for some photo ideas I had in mind. Thank you big5824 and radhoo, those links are a great help, and thanks Bjørn for the safety concerns, i do however have several pairs of 532nm blocking goggles and i didnt intend to be in very close proximity to the activated laser anyway.
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