New Security Scanning Method under Development

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Researchers from North Carolina State University have used computer models to demonstrate the possibility of a low-cost security imaging device that makes use of inexpensive radio components. Functional prototypes are under development and would be orders of magnitude less expensive than existing imaging devices.

Currently, scanning devices that detect hidden weapons or contraband in airports rely on millimeter-wave cameras, which can cost more than $175,000. The cost of the technology is a significant limiting factor in determining where, and whether, to use these scanners.

Brian Floyd, an associate professor of electrical and computer engineering at NC State and lead researcher on the effort: “Our goal is to develop imaging technology that would be functional and affordable, making use of multi-antenna systems”.

Before developing a prototype, Floyd wanted to be sure that the idea would work. So, he and a team of students developed both a computer model and algorithms to simulate how – and whether – the new method would produce useful images, it did.

“Our camera uses radio waves instead of light waves,” Floyd says. “ We can use that camera to see through clothing and identify things that should not be there, like weapons.”

Floyd’s idea is to create an array of low-cost antennas and radio detectors that can detect and measure the radio waves in a targeted space, effectively acting as an interferometer.

“Objects, such as weapons or smuggled goods, would appear in stark contrast to the human body,” says Vikas Chauhan, a Ph.D. student in Floyd’s lab who has been investigating the technology. “Based on our simulations, a device using the new technology will work as well as existing interferometers, but would be far less expensive and less bulky than existing millimeter-wave cameras.”

According to news.ncsu.edu, the innovation is being developed as part of the NC State Chancellor’s Innovation Fund, which funds innovative ideas within the university that could lead to new companies or licensing opportunities.

“We’re building prototypes now and looking for corporate partners to help us move the technology to the marketplace,” Floyd says.