“ measure the distance to P2 “

that’s the exact issue I am working thru.

the LiDar sensors are stated range of 6m, and my bad swing of 70-90 mph… I might/hope to get P1 and P2 both in the same sensors (same direction not counting wayward balls) before going out of range. I think this is what the inexpensive monitors are doing. But the high end ones I think are using fast cameras.

assuming my two point track and speed works the 3 sensors, board, etc - gets close to the cost of used monitors.…. But this challenge is more fun :) :)

thanks

my plan was using 3 sensors, detect and triangulate an xyz position, then detect again (within the time still in range), triangulate the next xyz position.

The "triangulation" implies changing what the sensor is pointing at. For an initial location P1, in order to measure the distance to P2 the sensors must be physically repositioned. Even if P1 and P2 are coaxial with one sensor, the other 2 sensors must move. Otherwise, you'll measure how quickly the object goes out of range at P1. For a golf ball, that's like, what, 20 mm? Coordinating that is...um...a challenge.

I'd recommend you dig into how golf ball launchers work. I initially though they used something similar to laser projectors (that us DMD chips). But I don't know if there's a version that can range find; I suspect there is. The launchers I looked at said they used both lasers and cameras.

Good luck.

would LiDAR sensors like the TF mini detect a moving golf ball within about 15-20 feet?

How will using stationary range sensors help track motion?

AFAICT, only one would produce variable output and then only for a very short period and distance. The others would report the ball is present then gone.

How do the commercial golf swing devices work? I think they have to be able to track the ball in some fashion.

Getting Started with LIDAR - YouTube


Using an inexpensive LiDAR sensor can solve the ultrasonic range challenge.
Simply using 3 LiDAR sensors to detect range of a golf ball at 2 or more times would give me speed and direction.

would LiDAR sensors like the TF mini detect a moving golf ball within about 15-20 feet?
Thanks

(is there a way to delete old messages or is it sealed after a while?)

Unfortunately, the Xiao wasn´t showing as a USB device even when it wasn´t connected to anything after some (still unknown) mistake I made at some point, whereas it was showing fine when I tried it straight from the box...

But it seems to be manageable now. Although not ideal, I can work with that. 😅

You could maybe try this board?

https://www.hlktech.net/index.php?id=1157