What is the most accurate proximity sensor for a ping pong ball? I will be using this to calculate 3D positioning of a ping pong ball in flight. I only need to detect the ball within 0-5 feet (basically on one side of ping pong table).
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I've had some good luck with using the Pixy camera system.
http://www.cmucam.org/projects/cmucam5/wiki
You get a maximum of 50 FPS and can detect and locate different objects based on hue. The library function getBlocks() returns the X and Y center location of each of the objects the camera detects. You teach the camera what hues to recognize as blocks, and adjust the detection thresholds. I use mine in monochrome infrared light by adding a visible filter and lens kit from http://irlock.com/
LegitimateWorkUser
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In the meantime a student has made a really impressive implementation, that might answer your question: interactive tennis table
PowerStat
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