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aibo_rescue
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In-flight refuelling - 2007/07/26 11:54 This thread discusses the Content article: In-flight refuelling

I read the previous post on this subject just before we went on a short getaway to Canada where we stayed at the cottage ... where there was this safe, easy to use, "cordless kettle" that instantly reminded me about this project.



I wonder if it would not be easier to implement the "cordless kettle" idea and parts as a solution.

Basically, use existing unmodified power adapter and power supply units, and use kettle's 120/220V AC socket and resting plate as a simple docking station. Mount bot's DC/AC adapter somewhere inside the bot and connect it to a socket reclaimed from a bottom of kettle. The socket would be mounted on the outside of the bot. Next, use kettle's resting plate connected to 120/220V AC and mounted on the wall (or on some sort of base) as bot's docking target. A more sophisticated mod could extend the socket when needed and retract the socket when not in use.

Post edited by: aibo_rescue, at: 2007/07/26 06:24
Best ... Richard
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c6jones720
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Re:In-flight refuelling - 2007/07/26 17:22 Thats not a bad idea, but please remember that one of Chris Shur's criteria was that there be no sparking. Every time electrical contact is made and then broken between two conductors sparking is possible (look at and listen to the light switch contacts as you turn the switch on and off at night - relays are just the same).

All the sparking stuff aside that looks like a very sensible idea, as long as there was coupling the computer would never need to be turned off. I might consider this approach to produce a robot that never turns off.

Come to think of it an advantage of the kettle idea is that it never wastes energy because there are no components inside it. You could leave it plugged in forever and it would only consume power when a connection was made - it is environmentally friendly.

Post edited by: c6jones720, at: 2007/07/26 10:11
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aibo_rescue
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Re:In-flight refuelling - 2007/07/26 23:37 Sorry, I have not described the nature of "cordless kettle". It is a wireless (inductive?) power transfer and there is no direct electrical connection. Both, the kettle base/socket and resting plate/prong are sealed. You can spill water over a plate and set the kettle on wet surface and then on plate without the risk of shock.

The only thing I am not sure of is if the 120V AC (US standard) current is reduced or not before transfer. I hope not, the kettle's heating element needs all the juice the 120V AC can provide ... but I need to investigate that. If this gizmo does not provide 120V AC current within tolerance level of bot's AC/DC adapter, the whole idea does not work.

Post edited by: aibo_rescue, at: 2007/07/26 15:52
Best ... Richard
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c6jones720
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Re:In-flight refuelling - 2007/07/26 23:53 You know that now Im curious. Im going to have to buy one and take it apart.
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motters
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Re:In-flight refuelling - 2007/07/27 01:18 Recharging and navigation are closely related problems, leading to fully autonomous operation of the robot which should be one of the first major goals. This hand-waves over a multitude of details, many of which are very difficult, but I think it is something which will be achievable.
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aibo_rescue
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Re:In-flight refuelling - 2007/07/27 04:01 motters wrote:
Recharging and navigation are closely related ...

Absolutely, the cordless docking is only a part of the solution. But if this works well, it can make docking a much easier task after bot can find a docking base ... still needs to find it.
Best ... Richard
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