For remote borders with little or no infrastructure, there are various techniques that can keep an eye, or rather an ear, out. QinetiQ, a British firm, has a system called OptaSense, which uses a fiber-optic cable laid in the ground. Sound from above creates vibrations in this cable.
Dr. Chris Minto, Engineering Director of member company OptaSense, will present “Towards 1 Billion Sensors: Distributed Fiber Sensing as a Pervasive IoT Contributor” on behalf of FOSA during this week’s Optical Networking and Communication Conference (OFC) in San Diego, California.
Fiber optic sensing technology converts cables installed alongside transport infrastructure, such as railroads or highways, into an array of thousands of sensors which can detect acoustics, temperature or strain signals by using optical sensing techniques.
"Our approach has always been that when fiber-optic sensing is used, it's usually one of many other solutions," Mark Uncapher, the director of the Fiber Optic Sensing Association, told INSIDER.