Vehicle Ventilation Filter Loading Detection via Dosed Tracer Sensing
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Solution Overview
Problem
Current methods for determining the loading status of cabin air filters in agricultural vehicles lack real-time monitoring, leading to uncertainty in change intervals and inefficient filter replacement.
Innovation Solution
A system comprising a dosing module to introduce a fluid with a predetermined concentration of a component into the vehicle's ventilation system, a filter element to modify this concentration, and sensors to measure the change, with a processor determining the filter's loading status based on these measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If real-time monitoring of filter loading status is implemented, then measurement precision and reliability are improved, but device complexity increases
Solution Approach 1:
A test substance is introduced as an intermediary to indirectly measure filter loading status. The dosing module injects a known concentration of test substance into the air stream, and sensors downstream detect how much passes through the filter. This intermediary approach allows precise measurement of filter efficiency without requiring complex direct measurement equipment on the filter element itself.
Solution Approach 2:
The patent replaces complex mechanical filter testing equipment with a chemical/biological sensing system. Instead of using mechanical methods to assess filter loading, the system uses electronic sensors to detect the concentration of test substance in the air stream, converting a mechanical measurement problem into an electronic detection problem that achieves higher precision with simpler mechanics.
2Loss of information
If continuous monitoring is performed, then information completeness is improved, but energy consumption increases
Solution Approach 1:
The dosing module operates periodically rather than continuously, injecting test substance at intervals through the air handling system. Sensors are activated only during these periodic dosing events to measure the concentration. This periodic operation provides sufficient information about filter loading status while dramatically reducing energy consumption compared to continuous monitoring of all air streams.
Solution Approach 2:
The system monitors only a portion of the air stream by introducing test substance at specific locations and sampling at specific points, rather than continuously analyzing all air flow. This partial monitoring approach provides adequate information about overall filter status while minimizing the energy required for comprehensive continuous monitoring of the entire air handling 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 real-time monitoring of filter efficiency, remaining life, and optimal replacement timing, reducing ambiguity and improving operational safety and efficiency.
Implementation Method 1
the filter element arranged in fluid communication with the dosing module to filter the pre-determined concentration of the first component in the fluid channel
Implementation Method 2
one or more sensors arranged in fluid communication with the filter element, and arranged to measure a value indicative of the modified concentration of the first component in the filtered fluid
Data Source
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AI summary
Disclosed is a system (100) for use with a vehicle ventilation system having a fluid channe (150)l, the system (100) configured to determine a loading status associated with a filter element (120) comprising, a dosing module (110) configured to provide a fluid having a pre-determined concentration of a first component into the fluid channel (150); the filter element (120) arranged in fluid communication with the dosing module (110) to filter the pre-determined concentration of the first component in the fluid channel (150), to provide a filtered fluid comprising a modified concentration of the first component; one or more sensors (130, 132) arranged in fluid communication with the filter element (120), and arranged to measure a value indicative of the modified concentration of the first component in the filtered fluid; and a processor (140) operable to determine the loading status associated with the filter element (120).