Stanford engineers have developed experimental stickers that pick up physiological signals emanating from the skin, then wirelessly beam these health readings to a receiver clipped onto clothing. It’s all part of a system called BodyNet.
We tend to take our skin’s protective function for granted, ignoring its other roles in signaling subtleties like a fluttering heart or a flush of embarrassment.
Now, Stanford engineers have developed a way to detect physiological signals emanating from the skin with sensors that stick like band-aids and beam wireless readings to a receiver clipped onto clothing.
To demonstrate this wearable technology, the researchers stuck sensors to the wrist and abdomen of one test subject to monitor the person’s pulse and respiration by detecting how their skin stretched and contracted with each heartbeat or breath. Likewise, stickers on the person’s elbows and knees tracked arm and leg motions by gauging the minute tightening or relaxation of the skin each time the corresponding muscle flexed.
Zhenan Bao, the chemical engineering professor whose lab described the system in an Aug. 15 article in Nature Electronics, thinks this wearable technology, which they call BodyNet, will first be used in medical settings such as monitoring patients with sleep disorders or heart conditions. Her lab is already trying to develop new stickers to sense sweat and other secretions to track variables such as body temperature and stress. Her ultimate goal is to create an array of wireless sensors that stick to the skin and work in conjunction with smart clothing to more accurately track a wider variety of health indicators than the smart phones or watches consumers use today.
“We think one day it will be possible to create a full-body skin-sensor array to collect physiological data without interfering with a person’s normal behavior,” said Bao, who is also the K.K. Lee Professor in the School of Engineering.
Stretchable, comfortable, functional
Postdoctoral scholars Simiao Niu and Naoji Matsuhisa led the 14-person team that spent three years designing the sensors. Their goal was to develop a technology that would be comfortable to wear and have no batteries or rigid circuits to prevent the stickers from stretching and contracting with the skin.
Their eventual design met these parameters with a variation of the RFID – radiofrequency identification – technology used to control keyless entry to locked rooms. When a person holds an ID card up to an RFID receiver, an antenna in the ID card harvests a tiny bit of RFID energy from the receiver and uses this to generate a code that it then beams back to the receiver.
The BodyNet sticker is similar to the ID card: It has an antenna that harvests a bit of the incoming RFID energy from a receiver on the clothing to power its sensors. It then takes readings from the skin and beams them back to the nearby receiver.
But to make the wireless sticker work, the researchers had to create an antenna that could stretch and bend like skin. They did this by screen-printing metallic ink on a rubber sticker. However, whenever the antenna bent or stretched, those movements made its signal too weak and unstable to be useful.
To get around this problem, the Stanford researchers developed a new type of RFID system that could beam strong and accurate signals to the receiver despite constant fluctuations. The battery-powered receiver then uses Bluetooth to periodically upload data from the stickers to a smartphone, computer or other permanent storage system.
The initial version of the stickers relied on tiny motion sensors to take respiration and pulse readings. The researchers are now studying how to integrate sweat, temperature and other sensors into their antenna systems.
To move their technology beyond clinical applications and into consumer-friendly devices, the researchers need to overcome another challenge – keeping the sensor and receiver close to each other. In their experiments, the researchers clipped a receiver on clothing just above each sensor. One-to-one pairings of sensors and receivers would be fine in medical monitoring, but to create a BodyNet that someone could wear while exercising, antennas would have to be woven into clothing to receive and transmit signals no matter where a person sticks a sensor.
The Latest on: Wireless health monitoring
via Google News
The Latest on: Wireless health monitoring
- Machine Condition Monitoring Market Size Projected to Increase at a CAGR of 7% through 2025on September 6, 2019 at 4:46 am
IoT enabled condition monitoring equipment and software help in avoiding engine overheating, constant monitoring of fuel and oil level, maintain brakes and engine health consistently ... of thermal ...
- Are there any real links between wireless technology and health?on September 5, 2019 at 9:11 am
Were there any health risks to worry about ... distraction’ I sleep easier since I learnt how to monitor my daughter's smartphone Curry was not the first to endorse the idea that advances in wireless ...
- Stretchable wireless sensor could monitor healing of cerebral aneurysm | IDTechEx Research Articleon September 4, 2019 at 7:26 pm
Yeo's research team has also developed a flexible and wearable health monitor able to provide ECG and other information. He says the success of the monitoring technique demonstrates the potential for ...
- Cows go wireless: Fitness tracking and 5G collars enhance this farm's efficiencyon September 4, 2019 at 7:14 am
The herd’s 180 cows are fitted with wireless monitoring collars that work like fitness trackers ... app if there are any fluctuations that could indicate an illness or other health condition that ...
- Mobile Health (mHealth) Market 2019 Global Analysis, Opportunities And Forecast To 2024on September 4, 2019 at 1:47 am
Mobile health (mHealth) refers to the usage of mobile and wireless technologies to aid healthcare systems ... their health in a much more effective manner, offering continuous monitoring and ...
- Mercy Virtual partners with startup using wearables to monitor congestive heart failureon September 3, 2019 at 11:39 am
Myia Health has reportedly recruited thousands of Mercy patients to use its telehealth platform to monitor congestive heart failure ... a ballistocardiograph to be placed under a mattress, a wireless ...
- Apple Wins Patent for Multiple Device Reverse Wireless Chargingon September 3, 2019 at 3:37 am
Last year Patently Apple covered Huawei introducing reverse wireless charging on their Mate 20 Pro smartphone ... a wearable computing device or display, a health monitoring device, and so on. Apples' ...
- Smart devices are moving from fitness tracking to monitoring patients with chronic illnesseson September 1, 2019 at 11:45 am
Myia Health partnered with Mercy Virtual to provide technology that lets doctors monitor patients with congestive heart ... including a ring that tracks sleep, a wireless weight scale and a connected ...
- Mighty River Brewery Leverages VEN-U for 24/7 Wireless Sensor Monitoring and Data Analyticson August 29, 2019 at 9:58 am
Remote sensors can monitor various ... retail, health and fitness, manufacturing, and transportation settings like airports and public transportation. Scalable technologies employed by VEN-U include ...
- Stretchable wireless sensor could monitor healing of cerebral aneurysmson August 29, 2019 at 6:04 am
A wireless sensor small enough to be implanted ... Yeo's research team has also developed a flexible and wearable health monitor able to provide ECG and other information. He says the success ...
via Bing News