Microcontroller-based inductive metal sensor

Abstract

Metal detector is an inductive sensor device to detect metal behind some objects or at a short depth under the sand or the ground surface. This project designs and constructs an inductive metal sensor to detect metal.

This project use inductive sensors, which include a transmitter coil and receiver coil. Transmitter coil will generate variable magnetic field fluctuations. Based on the phenomenon of electromagnetic induction, receiver coil will gain an induction current. This induction current will be amplified, filtered, and fed into the ADC of microcontroller. Based on the current changes from the receiver coil when there are metal or no metals, microcontroller will handle the operation and displays the result on the LCD screen