Soon, biomedical sensors to keep astronauts fit in space

Washington, Dec. 2 : In an attempt to keep astronauts healthy in space, engineers from the Kansas State University are designing new tools and biomedical sensors for spacesuits.

The collaborative team, which includes electrical and computer engineering professors and over a dozen students, envisions a future spacesuit that could monitor astronauts' health and use body heat to power electronics.

The project involves five parts, with several students involved in each part, and while the first phase is developing and testing biosensors that can monitor astronauts' vital data, such as breathing rate or muscle activity, the second phase is creating a specialized wireless network so that spacesuit biosensors can communicate with each other and with a space station.

Using energy harvesting technology to power radios and biosensors while an astronaut is in a spacesuit is the third part and fourth part is building hardware prototypes for biosensors and energy harvesting electronics.

Producing spinoff technologies, such as new radio technologies and devices that apply to home care is the last part.

The engineers are using 3D electromagnetic field simulators and a spacesuit model built by Erin Monfort-Nelson, student in apparel, textiles and interior design.

The suit replica is made of multiple layers of material, including metalized fabrics to model the layers in real suits that protect astronauts and keep them warm.

Batteries are too dangerous to place in a spacesuit's oxygen-rich environment, so the team is developing new energy harvesting methods to gather energy.

These methods use the temperature difference between body heat and the spacesuit's cooling garment to power radios and other electronics inside the spacesuit.

William Kuhn, professor of electrical and computer engineering, is working with Thomas Barstow, professor of kinesiology, and a team of students to develop sensors that astronauts can wear to measure their health and predict fatigue onset.

Some of these wearable body area network sensors include electromyographic sensors to monitor muscle activity, accelerometers to measure movement, pulse oximetry sensors worn on the forehead, wrist or finger to measure blood oxygen saturation and heart rate, and chest-worn respiration belts to measure breathing rate.

--ANI (Posted on 02-12-2013)

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