Next-generation metal detecting

摘要

Security at airports and other buildings could be improved by technology to increase the accuracy of metal detectors. Metal detectors are used in everything from airports, event security and landmine clearance, to food safety, scrap sorting and archaeological surveys. The technology is simple and portable, making it cost-effective for safety and security applications. But existing metal detectors are limited in their ability to distinguish between objects of different shapes and materials, and can only detect objects hidden a small distance below the surface.