Thx for the quick answer!
Yes, 20ms ~ 50fps. This is fast enough.
And I want to track movement between 10 and 100 cm.
This Tutorial on the playground says the Ping)))s signal needs 29µs / cm = 2900µs / 100 cm = 5800µs (6ms) to return. but there will be additional time for sensor reading and so on. There is also a delay(100); in the syntax, i wonder why?
At the moment I'm using the SRF02, which needs a delay of at least 70ms in order to work correctly. I just want to make shure that the new sensor is really that fast before I buy it.
The ping)))s datasheet says:
Host Device Input Trigger Pulse tOUT 5 [ch956]s typical
Echo Holdoff tHOLDOFF 750 [ch956]s
Burst Frequency tBURST 200 [ch956]s @ 40 kHz
Echo Return Pulse Minimum tIN-MIN 115 [ch956]s
Echo Return Pulse Maximum tIN-MAX 18.5 ms
Delay before next measurement 200 [ch956]s
All together that makes about 20ms or did I forget something? I don't know that much about electronics :-/