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Cheap and dirty laser range finding
posted July 5 2010 18:01.06

Forrest Higgs wanted a way to measure distance for a robot he is making without the need of ultrasonic rangefinders, only alternative he had was with laser for direct measurement or offset trigonometric measurement.
Since direct measurement lasers cost alot he went with the second option, he placed a web cam and a laser pointer pointed parallel to each other at a measured distance, some maths and he had his rangefinder with accuracy up to 2cm in 4.5m distance and that's not final, it can be improved as maker thinks is likely noise in measurement and/or misalignment of the laser pointer.
Such a simple and neat way to measure (instead of cheap and dirty), don't you think? Complete info can be found here.

[Link: activetelepresence]
Tags: electronic project   diy   laser   tools   

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