Propagation ondes WiFi

Do you have a question? Post it now! No Registration Necessary

Translate This Thread From French to

Threaded View

Est-ce qu'on pourrait utiliser le WiFi pour la liaison entre un objet  
dans l'eau (piscine) et une centrale de commande en dehors de l'eau ?


Den

Re: Propagation ondes WiFi

Quoted text here. Click to load it


Un essai c


http://perso.telecom-bretagne.eu/francoislepennec/data/Enseignement/Maste
r/COR_WifiSousMarin.pdf
quelques cm.


http://www.defense.gouv.fr/dga/actualite/innovation-les-robots-sous-marin
s-ont-aussi-leur-wi-fi-4-12



Re: Propagation ondes WiFi

Quoted text here. Click to load it

Quoted text here. Click to load it

Quoted text here. Click to load it

Quoted text here. Click to load it

J'ai toujours entendu dire que ce sont les ondes extra longues qui  

baleines)

Re: Propagation ondes WiFi


Pour les sous marins c'est de la TTTBF, avec des antennes d'une longueur de  

quelques qui trainent dans le coin.  


Re: Propagation ondes WiFi



;-))

non mais leurs sons ont des harmoniques basses qui s'entendent parait  


Quoted text here. Click to load it

Quoted text here. Click to load it

Re: Propagation ondes WiFi
Quoted text here. Click to load it


Quoted text here. Click to load it

Quoted text here. Click to load it


'conduisant' les infra-sons comme des guides d'ondes,


des bateaux qui ont fait s'effondrer le rapport signal/bruit.
  


Re: Propagation ondes WiFi

Quoted text here. Click to load it

Quoted text here. Click to load it

Quoted text here. Click to load it

Quoted text here. Click to load it


Quoted text here. Click to load it


pris un serieux coup

Re: Propagation ondes WiFi
Quoted text here. Click to load it







Oui, c'est pour cela que les sous-marins doivent remonter
en surface pour transmettre, ou utiliser des longeurs d'ondes


  


Re: Propagation ondes WiFi


Quoted text here. Click to load it

Bonsoir


tes chances. Mais faut tester.

Nicolas


Re: Propagation ondes WiFi
Quoted text here. Click to load it



Quoted text here. Click to load it






  


Re: Propagation ondes WiFi


est en piscine, dans l'eau, je vais me tourner vers les ultrasons et un  



Den

Re: Propagation ondes WiFi


robot sous l'eau en plus des programmes automatiques habituels. j'ai les 4  


un paquet de cigarettes, rien de visible, ni antenne, ni led IR, ni HP. Je  

retransmission vers le robot par le fil d'alimentation, pourquoi pas?



5440e352$0$2207$ snipped-for-privacy@news.free.fr...


Quoted text here. Click to load it

Quoted text here. Click to load it



Re: Propagation ondes WiFi
Quoted text here. Click to load it


Quoted text here. Click to load it


Quoted text here. Click to load it

Quoted text here. Click to load it



avec de la radio VLF ou des ultra-sons, puisque le canal
de transmission et la liaison seront beaucoup plus fiables.
  


Re: Propagation ondes WiFi
Jean-Christophe wrote:



Quoted text here. Click to load it

subaquatique), je ne peux pas avoir de fil.

rien sur le sujet.



Den

Re: Propagation ondes WiFi

Quoted text here. Click to load it


Quoted text here. Click to load it

Quoted text here. Click to load it

Quoted text here. Click to load it


Quoted text here. Click to load it


quelques micowatt!

Re: Propagation ondes WiFi

Quoted text here. Click to load it

Quoted text here. Click to load it

En ultrasons ?

--  
Seuls les faucons volent.
Les vrais restent au sol.



Re: Propagation ondes WiFi


Quoted text here. Click to load it

Quoted text here. Click to load it

Ben non !



Re: Propagation ondes WiFi



Quoted text here. Click to load it

Quoted text here. Click to load it






--  
Seuls les faucons volent.
Les vrais restent au sol.



Re: Propagation ondes WiFi




Quoted text here. Click to load it

Quoted text here. Click to load it




--  
Sylvain

Re: Propagation ondes WiFi


Quoted text here. Click to load it


Quoted text here. Click to load it

Quoted text here. Click to load it






electromagnetiques



Site Timeline