Smart Filter Element Pressure Sensing for Accurate Replacement Timing

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Solution Overview

Problem

Existing filters in vehicles and machinery are difficult to assess for replacement, often leading to premature replacement or reduced efficiency due to the inability to determine their useful lifetime accurately through visual inspection alone.

Innovation Solution

A smart filter element equipped with a sensor that measures filter variables such as gauge pressure and communicates wirelessly with a receiving device, allowing for data analysis to determine the filter's remaining lifetime and recommend replacement.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a rule-of-thumb time interval is used for filter replacement, then the filter is replaced at regular intervals, but this leads to unnecessary cost by changing a filter before it has reached its useful lifetime

Engineering Contradiction:

Improvefilter replacement timing accuracyVSAvoidunnecessary filter replacement cost

Core Design Contradiction:

ReliabilityVSLoss of substance

Solution Approach 1:

The patent replaces the mechanical/manual inspection system with an electronic sensor-based monitoring system. A pressure sensor continuously measures the pressure differential across the filter element and transmits data wirelessly to a receiving device, enabling automated determination of filter replacement timing based on actual condition rather than fixed time intervals

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent implements a feedback loop where the sensor continuously monitors filter condition (pressure differential), compares it against threshold values, and provides real-time information to the receiving device. This feedback mechanism enables dynamic adjustment of maintenance scheduling based on actual filter performance and contamination levels

Inventive Principle:

Principle #23Feedback

2Ease of operation

If a rule-of-thumb time interval is used for filter replacement, then replacement scheduling is simplified, but the appliance or vehicle may be operated for a period of time at less than desirable efficiency due to the filter becoming clogged or plugged

Engineering Contradiction:

Improvefilter replacement scheduling simplicityVSAvoidvehicle operating efficiency

Core Design Contradiction:

Ease of operationVSProductivity

Solution Approach 1:

The filter monitoring system is self-service in that it automatically measures its own condition through the integrated pressure sensor and wirelessly communicates status information without requiring manual inspection. The system serves itself by providing real-time data on filter health, eliminating the need for operators to perform visual inspections while maintaining simple operation through automated alerts

Inventive Principle:

Principle #25Self-service

3Ease of operation

If visual inspection is used to assess filter condition, then the assessment method is simple, but the state of a particular filter is often not assessable while the filter is in operation

Engineering Contradiction:

Improvefilter condition assessment simplicityVSAvoidfilter condition assessment accuracy

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent replaces visual inspection with electronic sensing technology. A pressure sensor mounted on the filter element continuously measures the pressure differential across the filter media and transmits this data wirelessly to a receiving device, enabling accurate assessment of filter condition during operation without requiring manual visual inspection

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

This solution enables precise determination of filter replacement needs, optimizing filter usage, reducing unnecessary replacements, and maintaining vehicle efficiency by providing timely recommendations for filter maintenance.

Implementation Method 1

a sensor configured to measure a filter variable, such as gauge pressure

Methodology Applied

Scientific EffectPressure measurement:

Data Source

PatentUS11779870B2Smart filter elements and systems

Publication Date: 2023.10.10 MAHLE INT GMBH

AI summary

A system is provided for monitoring the condition of a filter incorporated into a vehicle or other apparatus in order to identify when the filter should be cleaned or replaced is provided. This system generally comprises a receiving device and a smart filter element. The smart filter element a filter media having a first side and a second side; a frame comprising a plurality of walls that surrounds at least a portion of the screen; and a sensor configured to gauge pressure and to communicate wirelessly with the receiving device. The sensor being located approximate to the second side of the filter media.