Metal detector for a receptacle

A metal detector for use with a receptacle to receive refuse, the metal detector comprising:

• a body including a top side and a bottom side, opposite the top side, and defining an opening extending through the body between the top side and the bottom side and configured to receive the refuse therethrough;
• a controller;
• a coil mounted to the body, wound around the opening, and in communication with the controller, wherein the controller is configured to detect changes to a magnetic field generated by the coil when an object comprised of a metallic material and located within the opening interacts with the magnetic field and induces voltage within the coil;
• and
• a door positioned adjacent the bottom side of the body and moveable between a closed position and an open position,
• wherein the door in the closed position is configured to retain the refuse therein and the controller determines from the induced voltage that the refuse includes the object comprised of the metallic material,
• wherein the door in the open position is configured to allow the refuse to move through the opening and into the receptacle after removal of the object from the refuse,
• wherein the door comprises a first section and a second section each pivotally coupled to the body, and
• wherein the first section and the second section extend toward one another in the closed position and are configured to pivot away from one another in the open position to allow the refuse to move through the opening.

A metal detector for use with a receptacle to receive refuse, the metal detector comprising:

• a body having a top side and a bottom side, opposite the top side, and comprising:
• an external surface having a first portion and a second portion spaced from and facing away from the first portion, the first portion defining an opening extending through the body between the top side and the bottom side and configured to receive the refuse therethrough;
• and
• an internal surface defining a cavity that surrounds the opening;
• a controller;
• a coil mounted to the body within the cavity and disposed along the internal surface adjacent the first portion of the external surface, the coil comprising a wire having a plurality of windings around the opening that extend between the top side and the bottom side, wherein the controller is in communication with the coil and the controller is configured to detect changes to a magnetic field generated by the coil when an object comprised of a metallic material and located within the opening interacts with the magnetic field and induces a voltage within the coil;
• and
• a shield disposed within the cavity between the coil and the second portion of the external surface, extending from the internal surface adjacent the top side of the body to the internal surface adjacent the bottom side of the body, surrounding the coil around the opening, and configured to reduce electromagnetic interference from outside of the opening of the body,
• wherein the body defines a channel that extends in from the bottom side and is configured to receive a receptacle to which the metal detector is mounted.