Magnetic Sensor Automatic Balance Circuitry

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Magnetic sensors often fail to maintain a null state due to manufacturing tolerances, environmental effects, and installation issues, leading to non-zero output signals that can limit amplification and sensitivity, requiring mechanical adjustments that disrupt precision and stability.

Innovation Solution

A closed-loop circuitry system that uses feedback voltages to balance and correct non-null sensor outputs, employing AC/DC converters, amplifiers, filters, and discrete Fourier transforms to dynamically adjust null values in real-time, canceling phase differences and rebalancing coils to achieve zero voltage conditions without downtime or reliability issues.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If mechanical adjustments are used to correct non-zero output signals, then the sensor can be rebalanced, but the precision and stability are disrupted and downtime occurs

Engineering Contradiction:

Improvenull state accuracyVSAvoidoperational continuity

Core Design Contradiction:

Measurement precisionVSReliability

Solution Approach 1:

The patent replaces mechanical adjustment mechanisms with an electronic feedback system. A feedback coil generates corrective magnetic fields automatically through electrical signals, eliminating the need for physical mechanical adjustments while maintaining measurement precision and operational continuity.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent implements a closed-loop feedback system where the sensor output is continuously monitored and fed back through a control circuit that automatically adjusts the feedback coil current to maintain the null state, eliminating downtime and preserving both precision and reliability.

Inventive Principle:

Principle #23Feedback

2Measurement precision

If mechanical adjustments are made to correct non-null outputs, then balance can be restored, but operation must be interrupted

Engineering Contradiction:

Improveoutput signal accuracyVSAvoidsensor downtime

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The feedback system operates continuously without interruption, constantly monitoring the sensor output and applying corrective fields as needed. This eliminates downtime by maintaining continuous operation while preserving measurement precision through real-time electronic adjustments.

Inventive Principle:

Principle #20Continuity of useful action

Solution Approach 2:

Electronic feedback control replaces mechanical adjustment procedures that require system shutdown, enabling continuous operation while maintaining accurate output signals through automated electronic corrections.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Reliability

If non-zero output signals are not corrected, then continuous operation is maintained, but amplification and sensitivity are limited

Engineering Contradiction:

Improveoperational continuityVSAvoidsignal sensitivity

Core Design Contradiction:

ReliabilityVSMeasurement precision

Solution Approach 1:

The feedback system enables continuous operation by automatically correcting non-zero outputs in real-time, preventing degradation of signal sensitivity and amplification capabilities while maintaining operational continuity without interruption.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

Electronic feedback control maintains both operational continuity and high signal sensitivity by continuously correcting output signals through automated electronic adjustments, eliminating the trade-off between continuous operation and measurement precision.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Enables continuous operation with enhanced sensitivity and resolution by dynamically adjusting null values, canceling out-of-phase voltages, and maintaining precision, thus improving the sensor's performance in high-resolution applications without mechanical adjustments.

Implementation Method 1

a primary coil and a first secondary coil outputting a first voltage... a second secondary coil outputting a second voltage

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Data Source

PatentUS11650230B2Magnetic sensor with automatic balance circuitry

Publication Date: 2023.05.16 BAKER HUGHES OILFIELD OPERATIONS LLC

AI summary

Sensor circuitry utilizing feedback to balance sensor output data is provided. An apparatus can include a primary coil and a first secondary coil outputting a first voltage. The apparatus can also include a second secondary coil outputting a second voltage. The apparatus can further include circuitry coupled to the first secondary coil and the second secondary coil. The circuitry can be configured to receive the first voltage from the first secondary coil and the second voltage from the second secondary coil. The circuitry can also be configured to determine a feedback voltage based on a difference between the first voltage and the second voltage. The feedback voltage can correct the difference. The circuitry can also modify a third voltage that can be output by the circuitry to be zero based on the feedback voltage.