For a short time, Kerry Finn felt like “The Terminator” or “The Six Million Greenback Man.” The 60-year-old retired truck driver from Salt Lake County, Utah, misplaced his left leg to vascular illness from kind 2 diabetes.

However final 12 months, he was one in all 10 human topics on the College of Utah to check one of many world’s first actually bionic legs, a self-powered prosthetic limb with a pc processor and motorized joints within the ankle and knee that allow an amputee to stroll with extra energy, vigor and higher stability.

“In the event you’ve ever seen ‘The Terminator,’ that is what it was like,” Finn says concerning the expertise of testing the bionic leg over the usual prosthetic he usually makes use of. “It made me really feel like I might do issues I couldn’t do earlier than. Each time I made a step, it was an superior feeling.”

College of Utah mechanical engineering assistant professor Tommaso Lenzi, who heads the challenge creating the “Utah Bionic Leg,” has simply obtained two grants to additional advance the expertise. One is a $2.2 million award from the Nationwide Institute of Well being and the opposite a $600,000 grant from the Nationwide Science Basis.

Higher, stronger, quicker

Just like the bionic limbs on fictional astronaut, Steve Austin, within the hit TV sequence, “The Six Million Greenback Man,” Lenzi’s Utah Bionic Leg could make amputees higher, stronger and quicker, although not essentially with Austin’s power to raise automobiles or run at 60 miles per hour.

As a substitute, Lenzi’s actual bionic leg has sensors, motors, a pc processor and synthetic intelligence that each one work in conjunction to provide the person extra energy to stroll with much less stress on the physique than with a regular prosthesis. Meaning individuals with amputations, significantly aged people, can stroll for much longer with the brand new leg.

In the event you stroll quicker, it’ll stroll quicker for you and offer you extra power. Or it adapts mechanically to the peak of the step. Or it might probably provide help to cross over obstacles.”


Tommaso Lenzi

The leg makes use of custom-designed drive and torque sensors in addition to accelerometers and gyroscopes to assist decide the leg’s place in area. These sensors are related to a pc processor that perceives the setting and determines the person’s rhythmic motions, step size and strolling velocity.

Primarily based on that real-time information, it then supplies energy to the motors within the joints to help in strolling, standing up, strolling up stairs, or maneuvering round obstacles.

“Each time you’re taking a step, it is powered, and it offers a sure kick. It additionally offers me the flexibility to take two steps at a time going up stairs,” Finn says. “With this leg, it is much less pressure on my stump. You do not have to work as arduous. And it takes a whole lot of the stress off the physique.”

Half the burden

Simply as essential, the leg is designed to be about six kilos, half the burden of different bionic legs below improvement, an enormous profit for a big demographic of amputees — aged individuals or those that, like Finn, misplaced a decrease limb to vascular illness.

“The individuals who want these bionic legs are those who’re usually essentially the most restricted — the aged,” Lenzi says.

Whereas the prosthetic is fabricated from principally aluminum and titanium, the light-weight building is extra because of the leg’s design by which “all the parts play collectively,” Lenzi says. “We’ve a novel manner of designing the methods.”

For instance, the leg makes use of a wise transmission system connecting {the electrical} motors to the joints. This optimized system intuitively is aware of what sort of exercise the person desires to do and mechanically adapts to it, like shifting gears on a motorcycle. The leg additionally makes use of smaller batteries to energy the motor which are constructed into the leg.

Lenzi and his crew simply obtained the federal government grants to analysis how the leg permits a person to maneuver higher and do extra. The crew will even be researching how the prosthetic may very well be designed to raised anticipate a person’s actions by monitoring muscle exercise within the individual’s residual limb.

“The flexibility to stroll is important to your life and having the ability to pursue no matter you need to do. When simply standing up is a ache and when strolling means being afraid of falling, you simply do not go on along with your life and you’re caught at dwelling,” Lenzi says. “That is about making bionics accessible for all individuals and never simply those that are younger and excessive performing.”





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