NASA Gamma Ray Observatory Recycled as a Nuke Detector
Twitter Emerges as Key Communications Channel in China Quake

Robots Evolution: Adopting Eyes of a Fly

72557931irqwmveiflyseyes Robots with flies' eyes could take advantage of the insect’s vision system to better locate the edges and boundaries of objects. This ability could help robots perform a variety of tasks more quickly and accurately than if they were using traditional sensors enhancing unmanned vehicles, guided missiles, and high-speed industrial inspection robots to locate tiny, moving objects with high precision.

Researchers from the Naval Air Warfare Center in China Lake, California, and the University of Wyoming have developed a fiber optic sensor inspired by the compound eye of the common housefly, Musca domestica. Flies possess a visual precision beyond the resolution limit – a property called hyperacuity. This feature is actually common to many animals, including humans. Overall, insect vision (and sensor technology inspired by it) is still far inferior to human vision. Unlike conventional image processing systems which are often digital, the fly’s processing system is analog. The analog system helps the fly extract edge information much more quickly, and also enables parallel processing. Both these features contribute to the fly’s highly accurate, high-speed vision system.

The researchers explained that the more interesting component of the fly’s vision system is that the field of view of each photoreceptor in a fly’s eye overlaps with those next to it, with up to 90% overlap. Each eye contains about 3,000 ommatidia – the major structural unit of the eye – and each ommatidium contains eight photoreceptors. The photoreceptors’ main function is to convert light into ionic current, which then goes to the fly’s processing system(s).

The researchers designed their sensor to mimic the fly’s overlapping photoreceptors and analog, parallel processing system. The sensor consists of a 1-mm-diameter ball lens that focuses light onto an array of photodetectors, where the field of view overlaps by about 70%. In experiments, the sensor could locate a 1-mm-wide string as the string moved across the field of vision at distances up to 200 mm from the lens, with minimal error.

Posted by Jason McManus.

Related Galaxy posts:


Robot Evolution: A Parallel to the Origins of Life
Robots Rising -Scientists are Worried
Virtual Immortality -How To Live Forever
DepthX -Thinking Robot to Explore Jupiter's Moon, Europa
What do Robots Dream of?
Scientists Create Artificial Brain

 

Source link:

http://www.physorg.com/news129545593.html

Comments

Sometimes I sit in my chair to read an interesting article, I think today was the day this article is great, I love to fly since childhood my dad was a pilot and I grew up watching it fly on the family farm, I always I wanted to follow in his footsteps but I studied and devoted to something else, that does not mean that I still adore the flights.

Verify your Comment

Previewing your Comment

This is only a preview. Your comment has not yet been posted.

Working...
Your comment could not be posted. Error type:
Your comment has been posted. Post another comment

The letters and numbers you entered did not match the image. Please try again.

As a final step before posting your comment, enter the letters and numbers you see in the image below. This prevents automated programs from posting comments.

Having trouble reading this image? View an alternate.

Working...

Post a comment

Your Information

(Name is required. Email address will not be displayed with the comment.)