An underwater robot for hull cleaning

aprile 23, 2010 Technology No Commenti

Hull BUG

Those who have been sailing at sea know well that the formation of barnacles which grow in the fissures of the hull of a boat and in the submersed part of the vessel can pose a serious threat, especially in terms of cost under the energy-saving point of view, as these formations can slow a boat down by up to 10 per cent, but on the other end, the effort to regain the lost 10 per cent can cost up to 40 per cent more in fuel.

On top of this, you should also calculate the cost, and the waste of time, to take the boats out of water for a thorough cleaning operation. All this might soon be a thing of the past thanks to Hull Bug, an underwater robot which can autonomously perform cleaning of encrusted hulls.

Developed by the US Office of Naval Research, Hull Bug has four wheels and an array of instruments and sensors on board; to get started it is placed in the water, where thanks to a sort of vacuum cleaner it would attach to the bottom of the boat to clean. At this point it starts working on its own without human intervention.

Thanks to its several sensors, it can dodge any obstacles while moving, while a fluorometric device detects the presence of biofilm on the boat. Biofilm is a concentration of microorganisms which works as a base where barnacles and parasites will grow.

At this point, Hull Bug would start its powerful brushes, an cleans the hull from any biofilm, in order to prevent formation of barnacles, rather than removing them when they are already formed. So far, tests have given positive results, and it may not be too long before we see a robot like this in any port.

Pocket video recorder, professional footage at all times

aprile 23, 2010 Technology No Commenti

DVR 806

To take video footage of a professional type, you do not need to tote a heavy video camera, if you have the possibility of carrying with you a small pocket video recorder that you can use in all those situations when a hidden camera pr a pocket video recorder can provide a valuable help.

For open air videos, for a bicycle ride with your friends in summer or a ski ride down a hill in winter, for hidden leisurely footage such as candid camera videos, or professional for police or video surveillance operations, using a pocket video system like DVR 806 can be your best bet.

Although it is more or less as small as a cigarette pack, it can record up to 60 hours of video, with three different resolution levels, which is conveniently stored on its internal hard drive, with a 60 Gb capacity, and can later be comfortably downloaded and played back on a PC thanks to its USB cable.

It features three different recording modes: manual, timer-activated and with an automatic infrared activation sensor. By using this mode, the miniature video recorder will work while you are away, fo0r example to protect you against unwanted guests at home, or if you suspect that something wrong might be going on in the office during your absence.

By connecting it to the power mains, you will have at your disposal a real fixed surveillance camera, which you can use for unlimited recordings (compatibly with capacity of its hard disk and additional memory card). If you use its built-in lithium battery to power it, it will be your perfect companion for your excursions or your sport activities!


aprile: 2010
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