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Scientists Have Devised a Force Field to Move Minibots

January 14, 2016 By Capital Berg Team

"Scientists Devised a Force Field to Move Minibots "

Using planar coils and modulated repulsive force, a team of scientists manage to achieve individual movements within a group of microrobots.

A team of researchers from the Purdue University have managed to achieve individual movement in a swarm of small robots. The scientists have devised a force field to move minibots around, the field making use of repulsive forces.

They use magnetic fields to control the swarm’s movement

The idea isn’t entirely new. In the past, many attempts have been made to induce individual movement in a cluster of mechanical critters. But this process is not without its limitations.

Controlling a dust mite-like robot might seem like a piece of cake, but the problem is not how you achieve control, but how you power it. David Capellari, a scientist working on the project made a few statements regarding the project.

The mechanical engineer said that the robots are too small to be outfitted with an individual power cell. And so, the problem weaves around the concept of powering up the robot. The most reasonable solution would seem to be a global power grid, something strong and capable enough to power up the swarm.

In order to power up the robots and to ensure that they are capable of moving individually, the group of scientists from the Purdue University used a set of planar coils within a much larger system. This ensemble would provide a manipulable magnetic field, used to control the robot’s individually over the grid.

Capellari also declared that similar attempts of individual movement were made in the past, but to no avail. This is indeed the first time someone actually managed to offer individual movement to robots, who belong to a much larger group.

How is this movement achieved?

Using the magnetic properties, the team is capable of providing repulsive forces. These forces can be created by manipulating the electrical currents that flow through the planar coils.

Truly astounding, in this case, is that the scientists not only managed to induce individual movement, but they were able to show that you don’t need a global field in order to control all the individuals in a larger group.

Instead of using a global power field, the team opted for localized force fields. Using these improvements, each minuscule robot is capable of performing any number of tasks at the same time, thus contributing to the swarm.

Scientists have devised a force field to move minibots using planar coils. According to the team of scientists, the technology used to manufacture the planar coils is based on the one available to print circuit boards.

Capellari also added that he wants the minibots to achieve the ant’s degree of movement. He and his team want to aim even higher with this projects, by adding more bots to the collective and reducing them in size.

Presently, all the bots involved in the experiments are as big as a pinhead, but the team wants to make them even smaller.

 Photo credits:www.hizook.com

Filed Under: Science Tagged With: Magnetic fields, Microrobots, nanotechnology, Purdue University, swarm

Magnetic Fields found in meteorite grains give a shocking account of how the Solar System came into existence

November 16, 2014 By Carol Harper

magnetic-fields-meteorite-grains-solar-systems

The most accurate laboratory measurements yet made of magnetic fields trapped in grains within a primitive meteorite are providing important clues to how the early solar system evolved. Scientists studied magnetic fields inside these primitive meteorite chunks, which provided evidence of “shock waves” that traveled from the early sun through the dusty gas cloud of the early solar system that was the key to its formation, according to Astronomy Magazine.

The solar system’s formation was a messy process 4.5 billion years ago that left lots of rocky material that act as a time capsule for the solar system.

Among the most useful pieces of debris are the oldest, most primitive and least altered type of meteorites, called the chondrites.  Chondrite meteorites are pieces of asteroids, broken off by collisions, that have remained relatively unmodified since they formed at the birth of the solar system. They are built mostly of small stony grains, called chondrules, barely a millimeter in diameter.

Chondrules themselves formed through quick melting events in the dusty gas cloud, the solar nebula, which surrounded the young sun. As chondrules cooled, iron-bearing minerals within them became magnetized like bits on a hard drive by the local magnetic field in the gas. These magnetic fields are preserved in the chondrules even down to the present day.

The chondrule grains whose magnetic fields were mapped in the new study came from a meteorite named Semarkona, after the place in India where it fell in 1940. It weighed 691 grams, or about a pound and a half.

What these tiny magnetic fields showed is that shockwaves passed through solar nebula and amplified the background magnetic field by up to 30 times, which suggests that shock waves melted rock as far away as today’s asteroid belt, which is two to four times farther from the sun than earth.

Filed Under: Science Tagged With: Chondrites, Chondrules, India, Magnetic fields, meteorite grains, primitive meteorite, Semarkona

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