NASA NTRS · 19700000493
Metal detector system
Abstract
Signal voltage resulting from the disturbance of an electromagnetic field within the volume of a sensitive area is compared with a reference ac voltage for polarity information, which identifies the material. System output amplitude and polarity indicate approximate size and type of metal, respectively.
Keep this discovery
Explore connections, maps & timelines
Lee, R. D.. 1970-11-01. Metal detector system. https://ntrs.nasa.gov/citations/19700000493
Cite the original work for its findings. Save a collection to share your selection of sources.