Sensors in clothes to monitor vital signs for illness and warn on exposure to dangerous chemicals
March 18, 2013 // Paul Buckley
Peratech is working with the London College of Fashion, University of the Arts London to develop wearable electronics that use Peratech’s award-winning QTC sensors.
We are very excited to be involved in this project, said David Lussey, Peratechs CTO. Our QTC materials have already been used to provide switches in clothing for a number of years and so we know that it can withstand the rigors of being worn and washed. This project combines technology, design and user needs to work out how this growing area of wearable technology can be developed.
The core of QTC technology is that QTC materials change their resistance when a force is applied such as pressure. Printing QTC inks on to textiles enables simple on/off switches to be created but, more interestingly, because the resistance changes proportionally to the amount of force applied, areas of the cloth can become touch sensitive or can be made to recognise pressure inputs.
There are already glasses that provide computer displays, explained David Lussey, but they lack a simple way to input and interact with them. With our technology, you could print a keyboard onto a sleeve or onto the back of a glove and link it via Bluetooth to the glasses. Or even a rectangle of touch sensitive QTC material to act as a touchpad and respond to multi-touch gesture inputs of pinch, stretch, flick, etc. which are familiar from smartphones and tablets.
Apart from being touch sensitive, QTC materials can also detect the presence of volatile organic compounds (VOCs). Its printable QTC E-nose sensors work by the QTC material expanding in the presence of VOCs which changes the resistance of the QTC material giving very rapid response and recover times along with a high level of sensitivity. Different formulations can be made according to the specific VOC to be detected so that low cost warning sensors and the associated electronics can be printed onto textiles to provide clothing that monitors the wearer for signs of illness, fatigue or exposure to dangerous chemicals. All news
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