Self-Checking Analyzer Using Dual Frequency Response Validation

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Solution Overview

Problem

Current on-line analyzers for determining water content in petroleum products often require recalibration due to issues like coating buildup, leakage, and component failure, but users may not realize the need for recalibration until errors occur, leading to inaccurate measurements and potential equipment damage.

Innovation Solution

A self-checking analyzer system using two independent measuring devices with different frequency responses, such as an oil oscillator and a water oscillator, connected via a solid-state switch to the antenna element, which validates the measurements by comparing frequency responses and recalibrates in real-time using calibration curves and free air validation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If on-line analyzers are used to measure water content in real-time, then measurement speed and operational safety are improved, but system reliability deteriorates due to coating buildup, leakage, and component failure requiring recalibration

Engineering Contradiction:

Improvemeasurement speedVSAvoidsystem reliability

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The system continuously monitors the frequency response of the measuring device and compares it against expected values to detect calibration drift and system errors in real-time, providing feedback that triggers alerts or automatic recalibration before measurement accuracy deteriorates

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system performs preliminary validation checks by measuring frequency response characteristics and comparing them against baseline values before actual water content measurements are taken, preventing inaccurate measurements from being recorded

Inventive Principle:

Principle #10Preliminary action

2Measurement precision

If manual sampling and laboratory analysis are used, then measurement accuracy can be maintained, but productivity decreases and personnel safety is compromised

Engineering Contradiction:

Improvemeasurement accuracyVSAvoidanalysis speed

Core Design Contradiction:

Measurement precisionVSProductivity

Solution Approach 1:

The system replaces manual mechanical sampling and laboratory analysis with automated on-line frequency response measurement, eliminating the need for physical sample collection and human involvement while maintaining measurement accuracy through electrical property detection

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Productivity

If on-line analyzers operate for long periods without recalibration, then productivity is maintained, but measurement precision deteriorates due to coating buildup and component drift

Engineering Contradiction:

Improveoperational continuityVSAvoidmeasurement precision

Core Design Contradiction:

ProductivityVSMeasurement precision

Solution Approach 1:

The system continuously monitors frequency response deviations and provides real-time feedback that detects calibration drift before it affects measurement accuracy, enabling proactive maintenance scheduling

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system performs preliminary frequency response validation at the start of operation and after scheduled intervals to detect drift conditions before they compromise measurement precision

Inventive Principle:

Principle #10Preliminary action

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

Ensures accurate and timely detection of water content in petroleum products, reducing the risk of equipment damage and operational downtime by alerting users to system errors and allowing for prompt recalibration, thereby enhancing operational safety and efficiency.

Implementation Method 1

obtain a first frequency response to a multiphase fluid flow from a first measuring device and to obtain a second frequency response to the multiphase fluid flow from a second measuring device differing in frequency response from the first measuring device

Methodology Applied

Scientific EffectFrequency response measurement:

Data Source

PatentUS8278943B2Self-checking analyzer method and system using frequency response

Publication Date: 2012.10.02 PHASE DYNAMICS INC

AI summary

A self-checking analyzer system is provided according to an embodiment of this disclosure. The analyzer system includes a pipeline for receiving a multi-phase fluid flow and a first measuring device configured to provide a first frequency response corresponding to the multi-phase fluid flow. The analyzer system also includes a second measuring device differing in frequency response from the first measuring device and configured to provide a second frequency response corresponding to the multi-phase fluid flow. The analyzer system is configured to validate the first frequency response using the second frequency response.