 | | Re: Ultrasonic sensor interactions
|
|
(...) I was the one that mentioned that I couldn't find a way from the SW I have to turn the US sensor off. That said, I don't think it's time yet to worry about intractable problems: A hundred of us or so have been playing with this stuff for a (...) (20 years ago, 21-May-06, to lugnet.robotics)
|
| |
| | Re: Ultrasonic sensor interactions
|
|
(...) Wow! That's a lot lower than I'd have expected - at that frequency there is a good risk of harmonics from normal sound interfering with it. (...) Right - 350 meters per second is pretty slow by computer standards. (...) (Not to mention things (...) (20 years ago, 21-May-06, to lugnet.robotics)
|
| |
| | Re: Ultrasonic sensor interactions
|
|
(...) The device operates at 40kHz, the transmit and receive piezo devices are only resonant at that frequency. Even though the measurement period is short (time from transmit to time to receive) it is necessary to wait quite a while for the sound (...) (20 years ago, 21-May-06, to lugnet.robotics)
|
| |
| | 10152 cerco...
|
|
ciao a tutti cerco il (URL) o al limite MIB ad un prezzo ragionevole. ciao, Matteo. (20 years ago, 21-May-06, to lugnet.org.it.itlug.market)
|
| |
| | Re: Ultrasonic sensor interactions
|
|
(...) The 'Aloha' protocol was the predecessor of this. (...) Someone earlier told us that the thing runs all the time and can't even be shut off. That being the case, I think we're pretty much doomed. (...) Yes - but the relatively low frequency at (...) (20 years ago, 21-May-06, to lugnet.robotics)
|
| |
| | Re: Ultrasonic sensor interactions
|
|
(...) How about a single computer that was Bluetooth accessable. The server could act as a "lockable" resource that a NXT could acquire prior to doing the US detection. Then the NXTs don't need to know about each other, just the main server (and it (...) (20 years ago, 21-May-06, to lugnet.robotics)
|
| |
| | has anyone seen the batcave or the catwoman set in .au?
|
|
Has anyone seen either the batcase or the catwoman set here in australia yet? If so, where? (20 years ago, 21-May-06, to lugnet.loc.au)
|
| |
| | nuovi set.
|
|
zitti zitti , quatti quatti stanno uscendo i nuovi set : (URL) (20 years ago, 21-May-06, to lugnet.org.it.itlug)
|
| |
| | Re: Ultrasonic sensor interactions
|
|
The problem here is the management of a single shared resource, i.e. the air through which the ultrasonic signals travel. The lack of a Bluetooth broadcast mechanism makes the implementation of a conventional resource locking system difficult, but (...) (20 years ago, 21-May-06, to lugnet.robotics, FTX)
|
| |
| | Re: Ultrasonic sensor interactions
|
|
(...) This is a great idea except for one very important item: there is no such thing as a broadcast message (ie: a message sent to everyone) using Bluetooth. So for any such system to work, each robot has to know about every other robot, and send (...) (20 years ago, 21-May-06, to lugnet.robotics)
|
