I like to build a speed measure trap behind a floorball-goal with arduino.
Is it possible to measure the speed of a floorball with your garmin lidar-sensors?
• shooting distance betweend 3 and 20 meters (10 to 65 feet).
• max. speed of the ball could be 210 kmh (130 mph)
• the size of the white plastic ball is 7.2 cm (2.8 inch)
If yes, how big is the measure area (width and depth)?
How accurate would this speed-measure be?
It would be possible but…
These types of sensors have a narrow beam that the object being sensed has to be in to be detected. A ball is going to follow a parabolic arc as it flies and might not stay in the beam long enough to be reliability detected.
It might just work, but my concern is it might not be too reliable or repeatable. A radar type sensor might be better for your application
Found this in the data sheet if it helps:
What is the spread of the laser beam?
At very close distances (less than 1 m) the beam diameter is about the size
of the aperture (lens). For distances greater than 1 m, you can estimate the
beam diameter using this equation:
Distance/100 = beam diameter at that distance (in whatever units you
measured the distance).
The actual spread is ~8 milli-radians or ~1/2 degree.