Fluid Filter Clogging Detection via Pressure Derivative Analysis
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Solution Overview
Problem
Existing fluid filter clogging detection systems require visual inspection of indicators, which is cumbersome and costly, and do not accurately differentiate between partial and complete clogging without manual verification.
Innovation Solution
A method and device that measure the pressure difference across the filter and calculate its first derivative to send a clogging signal when the derivative becomes zero, eliminating the need for visual indicators and allowing for real-time detection of complete clogging using a single sensor and processor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If visual indicators and manual inspection are used to detect filter clogging, then the detection system is simple in structure, but the maintenance burden and cost increase due to required visual inspection
Solution Approach 1:
The patent replaces the mechanical visual inspection system with an automated electronic detection system. A pressure sensor continuously monitors the pressure difference across the filter, and a processor automatically analyzes the data to detect clogging conditions, eliminating the need for manual visual inspection while providing more accurate and continuous monitoring capability
Solution Approach 2:
The detection system performs self-monitoring and self-diagnosis by continuously measuring pressure differential and automatically determining filter clogging status. The system serves itself by providing continuous feedback on filter condition without requiring external manual inspection, thereby reducing maintenance burden
2Device complexity
If visual indicators are used to show filter status, then the device structure remains simple, but the ability to accurately differentiate between partial and complete clogging is insufficient
Solution Approach 1:
The patent replaces the crude visual indicator system with an electronic pressure sensing and data processing system. The pressure sensor provides precise continuous measurement of pressure differential, and the processor analyzes the data to accurately distinguish between partial clogging (where derivative is positive) and complete clogging (where derivative equals zero), achieving high measurement precision
Solution Approach 2:
The system implements continuous feedback monitoring by measuring pressure differential across the filter and processing this data to provide real-time information on filter condition. The feedback mechanism allows the system to continuously update the clogging status assessment, enabling accurate differentiation between partial and complete clogging states
3Reliability
If multiple sensors and visual indicators are deployed for comprehensive filter monitoring, then the detection capability is improved, but the device complexity and cost increase
Solution Approach 1:
The patent makes the pressure sensor multi-functional by using it for both measuring the pressure differential across the filter and detecting complete clogging through derivative analysis. The same sensor and processing system serve multiple detection purposes, eliminating the need for separate visual indicators and reducing overall component count while maintaining high detection reliability
Solution Approach 2:
The patent merges the functions of pressure measurement and clogging detection into a single integrated system. The pressure sensor and processor work together as a unified detection mechanism that simultaneously provides both partial and complete clogging detection, reducing the number of separate components needed
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 accurate and cost-effective detection of filter clogging without visual inspection, informing users and maintenance crews whether the filter is partially or completely clogged, reducing maintenance burdens and costs.
Implementation Method 1
measuring, at successive sampling instants, the pressure difference between upstream and downstream of the filter
Data Source
AI summary
A method of detecting clogging of a fluid filter is disclosed. The method includes measuring, at successive sampling instants, the pressure difference ΔP from upstream to downstream across the filter, calculating the first time derivative {ΔP}′ of the pressure difference ΔP at different instants, and then sending a clogging signal SC representative of the filter being clogged when the first derivative {ΔP}′ is equal to zero.