Inside The Metal Detector Pdf [verified] -

by Carl Moreland and Dave Johnson is the industry standard for understanding the specific circuitry of commercial machines [8].

How does a detector tell a silver dime from a rusty bottle cap? Through phase shift . inside the metal detector pdf

When a person passes through, any metallic object on their body causes a disturbance in that field (eddy currents are induced in the metal). The receiver coils detect the resulting change in phase and amplitude. The system’s signal processor analyzes this change and, if it exceeds a preset threshold, activates an audio and visual alarm. by Carl Moreland and Dave Johnson is the

Here's a step-by-step explanation of the process: if it exceeds a preset threshold