Patent ID: 11867864
Assignee: nan
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A continuous wave system for detecting metallic objects, comprising
a transmitter assembly and a receiver assembly;
wherein the transmitter assembly comprises a transmitter coil housed in a first column, a first clock configured to emit a first electrical signal at a first frequency, a first frequency generator configured to transmit to a corresponding transmitter coil an electrical signal having a frequency which is synchronized to the first frequency such that the transmitter coil emits a magnetic field;
wherein the receiver assembly comprises:
a receiver coil housed in a second column, distinct from the first column, said receiver coil being configured to produce an electrical signal as a function of the magnetic field emitted by the transmitter coil, a second clock configured to emit a second signal at a given frequency, and a second frequency generator configured to determine an electrical signal having a frequency which is synchronized to the second frequency; and
a unit for comparing the electrical signal produced by the receiver coil with the electrical signal determined by the second frequency generator;
a detector configured to detect an instant of zero crossing of electrical signals transmitted by the first frequency generator or the second frequency generator;
a signal generator configured to generate a phase realignment signal synchronized to the instant of zero crossing detected by the detector; and
transmission means comprising a wireless communication interface configured to transmit to the transmitter assembly or to the receiver assembly the phase realignment signal in order to realign a phase of the first clock with a phase of the second clock.