Optical Analyte Sensor for Filter End-of-Life Detection
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Solution Overview
Problem
Current filter systems lack an accurate and reliable method to indicate the end-of-service-life for filter media, particularly in hazardous environments, where exposure to volatile organic compounds poses risks, and existing solutions may not effectively detect chemical analytes like organic vapors or reactive gases.
Innovation Solution
A filter system incorporating an optical analyte sensor and reader, where the sensor changes optical characteristics in response to analytes, and the optical reader detects these changes using light sources and detectors to provide an accurate end-of-service-life indication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional chemical, optical or electronic indicators are used to detect analytes, then the filter system can provide end-of-service-life indication, but the detection accuracy and reliability for hazardous airborne substances is insufficient
Solution Approach 1:
The patent replaces conventional chemical indicators and electronic sensors with an optical detection system. The optical analyte sensor uses optical fields to detect analytes, substituting mechanical and chemical detection methods with optical methods that provide higher precision and reliability in hazardous environments.
Solution Approach 2:
The optical analyte sensor detects changes in optical parameters (such as absorption, reflection, or emission characteristics) when analytes are present. By monitoring these parameter changes, the system achieves accurate and reliable detection of end-of-service-life conditions for the filter medium.
2Reliability
If the optical reader is permanently attached to the housing, then the detection system is stable and reliable, but the device complexity increases
Solution Approach 1:
The optical reader is designed with a dual-attachment capability, allowing it to be either permanently or removably attached to the housing. This multi-functionality enables the same component to serve different operational needs, providing stability when permanently attached while reducing complexity when removably attached for maintenance or replacement.
3Ease of operation
If visual indicators are used to indicate filter effectiveness, then the system is simple and easy to operate, but the indication is not precise enough for hazardous environments
Solution Approach 1:
The patent replaces visual indicators with an optical detection system that uses light sources and detectors to measure analyte presence. This substitution maintains ease of operation through automated detection while dramatically improving precision by providing quantitative optical measurements rather than subjective visual assessment.
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
The system provides a reliable and accurate method to detect analytes, ensuring timely replacement of filter media and enhancing safety in hazardous environments by offering a non-visual, precise indication of filter effectiveness.
Implementation Method 1
The optical analyte sensor includes a detection medium that changes at least one of its optical characteristics in response to an analyte
Implementation Method 2
at least a portion of light emitted by at least one light source is reflected from the optical analyte sensor and captured by at least one detector
Data Source
Figure 1~2
Figure 3A~3B
Figure 4~5A
AI summary
A filter system includes a housing, a filter medium disposed within the housing and a optical analyte sensor also disposed within the housing in fluid communication with the filter medium. The optical analyte sensor includes a detection medium that changes at least one of its optical characteristics in response to an analyte. The filter system further includes an optical reader having at least one light source and at least one detector. The optical reader is attached to the housing such that at least a portion of light emitted by at least one light source is reflected from the optical analyte sensor and captured by at least one detector.