HI if you were to fit these down the side of a vehicle, the vehicle is moving forward can the ultrasonics still function pointing out from the vehicle at 90 degrees to the direction of motion of the vehicle? Do they have to be chained? what is the cross talk situation? would really love to know if this is possible.
Its really urgent sorry guys.
Thank you.
Phil
Hi Phil,
Do you mean something like this?
By chained I assume you mean having the scans being triggered sequentially/staggered (to prevent cross-talk)? Such as scan with sensor 1 and wait for results, scan with sensor 2, etc. until all sensors are checked and then repeat?
If so, that would most likely be required since otherwise you will get cross-talk.
Sincerely,
I absolutely mean like that correct. The vehicle moves at no more than 5 mph. So you would suggest chaining is essential to avoid the cross talk mentioned.
Thank you for your advice and time, much appreciated.
Sincerely
That should not be an issue, then.
Yes, that would be required. These sensors are pretty fast, but still “speed of sound” bound (plus overhead for analyzing the signals and reporting them) so you will need a bit of time between each sensor scanning for an object/surface. The worst case is if there is no detectable object/surface, as this takes the longest time to be detected (a timeout, essentially).
Check the datasheets for that value and assume you’ll need at least that much delay between individual scans.
Other than that, it should all work pretty well.
No problem! Good luck with your project! 
Sincerely,
Thank you very much.
All the best.
