WEAPON DETECTOR UTILIZING THE PULSED FIELD TECHNIQUE TO DETECT WEAPONS ON THE BASIS OF WEAPONS THICKNESS

摘要

This invention is a metal detector which utilizes pulsed field techniques in order to detect the presence of metal objects and to provide discrimination between metal objects based on characteristics such as thickness, size and shape. An object to be monitored for metal content is subjected to pulsating magnetic fields. The rate of change of the magnetic field occurring at either the initiation or termination of magnetizing pulses is interpreted to identify the metal object in terms of thickness.