Metal detector detects the amount of cash in your wallet

Day by Day the technology is rising to sky. Part of this technology, the physicists developed the latest Metal detector which detects the amount of cash you have. It detects the concealed banknotes with the help of magnetic inks which is in the currency. This technology will help police to catch the smuggler who carrying the currency illegally.

This metal detector works fine in detecting a currency from 3cm away, while placing under the plastic box, cardboard or cloth failed to block the signal in any way. Using bigger metal detectors such as those found in airports should also increase the range of sensing, though detecting banknotes in such conditions would be trickier as several other sources could hinder with the signal. In a real condition the signal will be loud and some type of digital signal processing may be required. The results available are from a feasibility study, and a lot of advance work is wanted to make it practical.

Markus Kuhn, a computer scientist at the University of Cambridge, says this kind of finding is a "smart plan" but metal detectors may show a same response to other magnetic things found in luggage, such as laptop power cables. He suggests that adding equipment to the detectors to pick up other aspects of the signal such as its timing and would allow for more detailed analysis.