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Portable radar device locates buried disaster victims
Volunteers test the FINDER prototype at the Virginia Task Force 1 Training Facility in the USA
A portable radar device that detects the heartbeats and breathing patterns of disaster victims trapped under piles of rubble has been unveiled.
The prototype technology, called Finding Individuals for Disaster and Emergency Response (FINDER), can locate individuals buried as deep as about 9m in crushed materials, hidden behind about 6m of solid concrete, and from a distance of about 30m in open spaces.
The joint project between Nasa and the US Department of Homeland Security’s (DHS) Science and Technology Directorate is based on remote-sensing radar technology developed by Nasa's Jet Propulsion Laboratory (JPL) to monitor the location of spacecraft JPL manages for Nasa's Science Mission Directorate.
"FINDER is bringing Nasa technology that explores other planets to the effort to save lives on ours," said Mason Peck, chief technologist for Nasa and principal advisor on technology policy and programs.
The technology was demonstrated to the media yesterday at the DHS's Virginia Task Force 1 Training Facility in Lorton, Virginia, with the device locating volunteers hiding under heaps of debris. FINDER also will be tested further by the Federal Emergency Management Agency this year and next.
"The ultimate goal of FINDER is to help emergency responders efficiently rescue victims of disasters," said John Price, program manager for the First Responders Group at DHS's Science and Technology Directorate. "The technology has the potential to quickly identify the presence of living victims, allowing rescue workers to more precisely deploy their limited resources."
The technology works by beaming microwave radar signals into the piles of debris and analysing the patterns of signals that bounce back. Nasa's Deep Space Network, an international network of antennas, regularly uses similar radar technology to locate spacecraft.
A light wave is sent to a spacecraft, and the time it takes for the signal to get back reveals how far away the spacecraft is. This technique is used for science research, too. For example, the Deep Space Network monitors the location of the Cassini mission's orbit around Saturn to learn about the ringed planet's internal structure.
"Detecting small motions from the victim's heartbeat and breathing from a distance uses the same kind of signal processing as detecting the small changes in motion of spacecraft like Cassini as it orbits Saturn," said James Lux, task manager for FINDER at JPL.
In disaster scenarios, the use of radar signals can be particularly complex. Earthquakes and tornadoes produce twisted and shattered wreckage, such that any radar signals bouncing back from these piles are tangled and hard to decipher.
JPL's expertise in data processing helped with this challenge as they were able to develop advanced algorithms that isolate the tiny signals from a person's moving chest by filtering out other signals, such as those from moving trees and animals.
Similar technology has potential applications in Nasa's future human missions to space habitats where the astronauts' vital signs could be monitored without the need for wires.
"Where would Frankenstein and his creative mind fit into today's workplace? Should we fear technological developments or embrace them?"