29-06-2012, 12:25 PM
METAL DETECTOR
METAL DETECTOR.ppt (Size: 248.5 KB / Downloads: 114)
HISTORY OF METAL DETECTOR
THE FIRST METAL DETECTOR WAS INVENTED IN 1881 BY ALEXANDER GRAHAM BELL.
THE PORTABLE METAL DETECTOR WAS FIRST INVENTED IN 1925.
TYPES OF METAL DETECTORS
Very low frequency (VLF)
Pulse induction (PI)
PI TECHNOLOGY
In a pulse induction detector, a pulse is generated and sent through a coil and the detector detects the metal object.
APPLICATIONS
AIRPORT SECURITY
BUILDING SECURITY
EVENT SECURITY
ITEM RECOVERY
ARCHAEOLOGICAL DIGGING
CAR DETECTION RESEARCH
CONCLUSION
NOW A DAYS SECURITY IS THE MAIN PROBLEM IN THE WORLD, METAL DETECTORS MAKE THE WORK EASY FOR THE POLICE TO SECURE THE PERSONS.