University of Alberta researchers, in collaboration with Canada’s Department of National Defence, have created a miniature sensor that operates without a battery. This sensor is capable of monitoring vital signs and detecting frostbite in soldiers deployed in extreme cold conditions. The project, led by Ashwin Iyer from the University of Alberta’s engineering faculty, is part of a long-term initiative with the Department of National Defence’s Innovation for Defence Excellence and Security program.
The primary objective of the program is to leverage existing commercial telecommunications technology for military applications. The University of Alberta is renowned for its pioneering research in developing SWaP-C systems, which are characterized by being low in size, weight, power, and cost.
Ashwin Iyer discussed the project with CBC’s Shannon Scott on The Trailbreaker. The sensor technology is designed to function in temperatures as low as -70°C, addressing the shortcomings of traditional battery-powered devices that often fail in such extreme environments due to the limitations of lithium-ion battery technology. By eliminating the need for batteries, the sensors can harvest energy from their surroundings to maintain power.
The sensors operate by utilizing radio frequency identification technology, which allows them to absorb energy from radio frequency waves present in the environment. This energy is then utilized for sensing and transmitting data, similar to a mirror reflecting information back.
In real-world scenarios, these sensors can be worn by soldiers to monitor vital signs such as heart rate, respiration, core body temperature, and extremity temperature. The sensors can detect the onset of frostbite and trigger alerts when certain thresholds are reached, enabling timely intervention to prevent serious health issues.
Beyond military applications, the technology has potential uses in emergency response and various other settings, including environmental monitoring in extreme conditions. The versatility of these sensors extends to detecting a wide range of parameters, making them adaptable for applications beyond military contexts.
