Smart Filter Blockage Detection Using Optical Sensors
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Solution Overview
Problem
Existing air filter systems lack accuracy in detecting blockage and fail to provide adjustable alerts for filter replacement based on specific user needs, often requiring users to actively seek replacement reminders, which can lead to premature or delayed filter changes.
Innovation Solution
A filter blockage detection and alert communication system using a housing with light sources, sensors, and actuators controlled by a microcontroller, which measures light intensity through the filter and communicates via IoT networks to send alerts when blockage thresholds are reached, allowing for customizable replacement schedules based on user-specific criteria.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If users replace filters based on fixed manufacturer recommendations, then filter replacement is simplified, but filter replacement timing is inaccurate leading to premature or delayed changes
Solution Approach 1:
The patent replaces manual tracking and fixed-schedule replacement systems with an automated optical detection system. Light sources and sensors automatically measure filter blockage, eliminating the need for users to manually track replacement schedules while providing precise, real-time blockage detection that adapts to actual filter conditions rather than following rigid time-based recommendations.
Solution Approach 2:
The filter monitoring system performs self-assessment by automatically detecting its own blockage level through optical measurements. The system generates its own replacement alerts based on actual blockage thresholds, eliminating the need for external manufacturer recommendations and enabling the filter to serve its own monitoring function.
2Device complexity
If fixed blockage thresholds are used for alerts, then alert generation is simplified, but alert timing cannot be adjusted for specific user needs
Solution Approach 1:
The patent implements dynamic, adjustable blockage thresholds that can be modified by users based on their specific needs. Instead of fixed thresholds, the system allows customization of alert triggers to accommodate different air quality conditions, usage patterns, and health requirements, making the alert mechanism adaptable rather than static.
Solution Approach 2:
The system enables users to change the blockage threshold parameters according to their requirements. The alert generation mechanism accepts variable threshold inputs, allowing the same basic system to adapt to different environments and user preferences without requiring complex hardware changes.
3Loss of time
If users actively monitor for filter replacement alerts, then timely detection is achieved, but user time and attention are consumed
Solution Approach 1:
The patent implements an active feedback system where the monitor communicates replacement alerts to users through various channels. Instead of requiring users to continuously check filter status, the system proactively notifies them when blockage thresholds are reached, providing timely information without requiring ongoing user attention or manual monitoring.
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 accurate and timely alerts for filter replacement, optimizing air circulation system performance and user health by adjusting to specific user requirements and environmental conditions.
Implementation Method 1
A filter blockage determination and alert communication system uses a housing with light sources, sensors, and actuators controlled by a microcontroller, which measures light intensity through the filter
Data Source
AI summary
The present invention provides a smart air filter blockage detection and alert communication system for use with filters in air circulation systems such as HVAC, vehicles, server systems, and dryers. The system attached to the frame of a filter comprises a light source, a light sensor, two actuators and a control unit. The control unit based on a stored program or an external command activates the actuators to place the source and the sensor devices attached to the two arms of the actuators on the two sides of the filter membrane. The sensor measures the light intensity transmitted through the filter. The control unit upon receiving the intensity data determines the filter blockage level and communicates alert to the user when the blockage exceeds a predetermined value. The system uses a 4G or a 5G IoT network capability for data collection and communication with servers and user devices.