University of Utah engineers found that a wireless network of radio transmitters can indicate people moving behind solid walls. The system could help police, firefighters and others nab intruders, and rescue hostages, fire victims and the elderly. It may also be useful to retail marketing and border control. Radio tomography can help law enforcement and emergency responders to know where they should focus their attention.
Radio tomographic imaging (RTI) is different and much less expensive than radar, in which radar or radio signals are bounced off targets and the returning echoes or reflections provide the target's location and speed. RTI instead measures "shadows" in radio waves created when they pass through a moving person or object. RTI measures radio signal strengths on numerous paths as the radio waves pass through a person or other target. It works in the dark, behind obsticales which proves to be more useful than optical and infrared imaging systems in these situations.
Reference: Science Daily
No comments:
Post a Comment