Quote:
Originally Posted by dk5sm5luigi
Given the noise we had seen in the past we switched to IR Rangefinders and probably won't go back. We found one that does up to 18 feet and the noise was easier to work with than the ultrasonic.
We listed them here: http://findrobotparts.com/sensors/ca...es/13/tags/635 |
We ran into some inconsistency in range with those. They seemed to report a range of a few inches when the wall is perpendicular to the sensor, then over a foot when the wall is still a few inches away but several degrees away from a "square" approach.
If I'm not mistaken, they judge range by reflection brightness, rather than time of flight or angle. So they're super sensitive to the reflectivity of the target. Since the wall of the airship is prime for
specular reflections, its reflectivity varies widely based on how perpendicular the sensor is to the wall.
Did you find this to be an issue as well?