What is the working principle of 33 zone metal detector using pulse induction

Thread Starter

sivaprabhakarb

Joined Nov 1, 2018
2
I am trying to design multizone walk through metal detector using continuous wave technology. There are two panel on left and right of 2 meter height.
both panel having one transmitter and six receiver coils. I want to design variable frequency same in both transmitter panel. i used colpitts oscillator.
with 4 turns on left and 4 turns on right then in connected in series. but i cant get depth upto 750 mm. how to increase
 

Thread Starter

sivaprabhakarb

Joined Nov 1, 2018
2
Dear All,
Please explain how 33 zone metal detector using pulse induction technology work. Please explain using block diagram, switching of transmitter coils.
 
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