Patent ID: 9366778
Filing Date: 2016-06-14
CPC Classification: G01V

Claim Text:
1. A method for recycling flyback energy in a pulse induction metal detector, the method comprising: providing a pulsed magnetic field transmitting system including a DC voltage power source having a first end connected to a ground common node, an inductive transmitter coil configured to create a magnetic field for energizing metal objects to be detected by the metal detector, a capacitor having a first end connected to the common node, a first electronic switch connected between a second end of the capacitor and a first end of the coil, a second electronic switch connected between a second end of the coil and the common node a first rectifier connected between the second end of the coil and the second end of capacitor, and a second rectifier connected between a second end of the power source and the first end of the coil, the first rectifier to steer electric current from the coil to the capacitor and the second rectifier to steer electric current from the power source to the coil; and operating the transmitting system in a repeating sequence, in quasi-steady-state operation the repeating sequence comprising: