US 11,781,852 B2 · Fluid lance stop position sensor detection method and system

Abstract

A system for distinguishing target metal objects from each other in close proximity to each other. The method includes transmitting a first sinusoid signal via a first transmit coil to a first receive coil in close proximity to the first transmit coil; transmitting a second sinusoidal signal at a second frequency and amplitude different from the first frequency and amplitude to a second receive coil arranged in close proximity to the second transmit coil and in close proximity to the first receive coil such that received signals in the first and second receive coils include first and second frequency signals from the other of the first and second transmit coils. The received signals are separated via frequency domain multiplexing. The signals are compared to detect a presence of the target having a signal magnitude different from the first received signal and the received second signal and a known reference point.

Claims20

Dependent claims

A method for distinguishing a target metal object from at least one other object in close proximity to the target metal object, the method comprising:

transmitting a first sinusoid signal at a first frequency and amplitude via a first transmit coil to a first receive coil arranged in close proximity to the first transmit coil to generate a first received signal;
transmitting a second sinusoidal signal at a second frequency and amplitude different from the first frequency and amplitude via a second transmit coil to a second receive coil arranged in close proximity to the second transmit coil and in close proximity to the first receive coil such that received signals in each of the first and second receive coils include both the first and second sinusoidal signals from the first and second transmit coils;
separating the received signals via frequency domain multiplexing into the first received signal corresponding to the first sinusoid signal and the second received signal corresponding to the second sinusoid signal;
and
detecting a presence of a target metal object based on a first received signal with presence of the target metal object being different from a first received signal without presence of the target metal object.

2 more elements

A method of detecting a hose stop collar on one of a plurality of flexible lance hoses arranged in close proximity to each other, the method comprising:

sending a first sinusoidal signal at a first frequency to a first transmit coil arranged around one of the plurality of flexible lance hoses;
sending a second sinusoidal signal at a second frequency different from the first frequency to a second transmit coil arranged around a second one of the plurality of flexible lance hoses;
receiving a first received signal at the first frequency in a first receive coil arranged around the one of the plurality of flexible lance hoses within the first transmit coil;
receiving a second received signal at the second frequency in a second receive coil arranged around the second one of the plurality of flexible lance hoses within the second transmit coil, wherein the second receive coil also receives the first received signal at the first frequency, wherein the first receive coil also receives the second received signal at the second frequency;
and
separating the first and second received signals via frequency domain multiplexing into a separate first sinusoidal signal corresponding to the first received signal from the one of the flexible lance hoses and a second sinusoidal signal corresponding to the second received signal from the second one of the flexible lance hoses.

3 more elements

A system for detecting a hose stop collar on one of a plurality of flexible lance hoses arranged in close proximity to each other, comprising:

an oscillator configured to generate and send a first sinusoidal signal at a first frequency to a first transmit coil arranged around one of the plurality of flexible lance hoses;
a second oscillator configured to generate and send a second sinusoidal signal at a second frequency different from the first frequency to a second transmit coil arranged around a second one of the plurality of flexible lance hoses;
a first receive circuit for receiving a first received signal at the first frequency in a first receive coil arranged around the one of the plurality of flexible lance hoses around which the first transmit coil is arranged;
a second receive circuit for receiving a second received signal at the second frequency in a second receive coil arranged around the second one of the plurality of flexible lance hoses around which the second transmit coil is arranged, wherein the second receive coil also receives the first received signal at the first frequency, wherein the first receive coil also receives the second received signal at the second frequency;
and
a processor for separating the first and second received signals via frequency domain multiplexing into a separate first sinusoidal signal corresponding to the first received signal from the one of the flexible lance hoses and a second sinusoidal signal corresponding to the second received signal from the second one of the flexible lance hoses.

3 more elements

Dependencies are inferred from the claim text.

Fluid lance stop position sensor detection method and system

Life of this patent

Fluid lance stop position sensor detection method and system

Life of this patent

Abstract

Claims20