Researchers at UBC Okanagan have developed what they are calling an end-to-end solution for wearable technology. The new type of sensor, combined with machine learning, may be the missing piece of the puzzle for scientists looking for a practical way of monitoring and interpreting human motion.—Image: YouTube

UBCO engineers advance capability of wearable tech

A new, low-cost, ultra-stretchable sensor can do more with less say UBCO officials

Creating the perfect wearable device to monitor muscle movement, heart rate and other tiny bio-signals without breaking the bank has inspired scientists to look for a simpler and more affordable tool.

Now, a team of researchers at UBC’s Okanagan campus have developed a practical way to monitor and interpret human motion, in what may be the missing piece of the puzzle when it comes to wearable technology.

What started as research to create an ultra-stretchable sensor transformed into a sophisticated inter-disciplinary project resulting in a smart wearable device that is capable of sensing and understanding complex human motion, explains School of Engineering professor Homayoun Najjaran.

The sensor is made by infusing graphene nano-flakes (GNF) into a rubber-like adhesive pad. Najjaran says they then tested the durability of the tiny sensor by stretching it to see if it can maintain accuracy under strains of up to 350 per cent of its original state. The device went through more than 10,000 cycles of stretching and relaxing while maintaining its electrical stability.

“We tested this sensor vigorously,” said Najjaran. “Not only did it maintain its form but more importantly it retained its sensory functionality. We have further demonstrated the efficacy of GNF-Pad as a haptic technology in real-time applications by precisely replicating the human finger gestures using a three-joint robotic finger.”

The goal was to make something that could stretch, be flexible and a reasonable size, and have the required sensitivity, performance, production cost, and robustness. Unlike an inertial measurement unit—an electronic unit that measures force and movement and is used in most step-based wearable technologies—Najjaran said the sensors need to be sensitive enough to respond to different and complex body motions. That includes infinitesimal movements like a heartbeat or a twitch of a finger, to large muscle movements from walking and running.

School of Engineering professor and study co-author Mina Hoorfar said the results may help manufacturers create the next level of health monitoring and biomedical devices.

“We have introduced an easy and highly repeatable fabrication method to create a highly sensitive sensor with outstanding mechanical and electrical properties at a very low cost,” says Hoorfar.

To demonstrate its practicality, researchers built three wearable devices including a knee band, a wristband and a glove. The wristband monitored heartbeats by sensing the pulse of the artery. In an entirely different range of motion, the finger and knee bands monitored finger gestures and larger scale muscle movements during walking, running, sitting down and standing up. The results, said Hoorfar, indicate an inexpensive device that has a high-level of sensitivity, selectivity and durability.

Hoorfar and Najjaran are both members of the Okanagan node of UBC’s STITCH (SmarT Innovations for Technology Connected Health) Institute that creates and investigates advanced wearable devices.

The research, partially funded by the Natural Sciences and Engineering Research Council, was recently published in the Journal of Sensors and Actuators A: Physical.

To report a typo, email: edit@kelownacapnews.com.


@KelownaCapNews
newstips@kelownacapnews.com

Like us on Facebook and follow us on Twitter.

Just Posted

Wildfire near Peachland shows no growth overnight

Fire chief Dennis Craig said wind was blowing the fire away from homes

Okanagan Mountain Park fire shows no growth overnight

The wildfire, also called Goode’s Creek wildfire, continues to burn near Kelowna

Update: Wildfire near West Kelowna mapped at 10 hectares

The wildfire near Glenrosa is considered out of control

Okanagan Wildfires: The latest on wildfires and evacuations

A Saturday morning look at the major wildfires impact the Okanagan and Similkameen.

UPDATED: Mount Eneas fire grows to 1,374 hectares

Regional District Okanagan-Similkameen issues evac alerts for properties in Area F.

BC Wildfire update on Okanagan blazes

Watch the media briefing on the current fire situation in the Okanagan.

Wildfire crews working to strengthen line around fire near Summerland

The Mount Conkle wildfire is 90 per cent guarded

Open water swimming from B.C. to Washington in 24 hours

The swim will take a full day, meaning Susan Simmons will be swimming in the black of night

Cigarette packs with graphic images, blunt warnings are effective: focus groups

Warnings considered effective flag ailments smoking can cause, like colorectal and stomach cancers

Canada’s title hopes quashed at Rugby Sevens World Cup in San Francisco

On the men’s side, Canada was eliminated in the round of 16 as they were shut out by Argentina 28-0

‘We are doing the right thing:’ Protesters dig in at anti-pipeline camp

B.C. Supreme Court ruled in March that both the camp and a nearby watch house could remain in place

Astronaut drops in on Kraftwerk gig, plays duet from space

Alexander Gerst becomes an astronaut musician with live performance from International Space Station

Wildfires near Vernon extinguished

BX, Dee Lake and Irish Creek fires all out

What’s happening this weekend

Follow Social Squad memeber Matthew Abrey to find out what’s happeing this weekend

Most Read