IoT Smart Filter Blockage Detection Using Optical Sensing
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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, often requiring users to manually remember replacement schedules, leading to premature or delayed filter changes.
Innovation Solution
A filter blockage detection and alert communication system using a housing with light sources and sensors coupled to a control unit, 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 filter replacement is based on fixed time intervals, then users can follow a simple schedule, but users may forget or replace filters prematurely/too late
Solution Approach 1:
The system continuously monitors filter blockage levels and provides real-time feedback to users through notifications when replacement is needed, eliminating reliance on user memory while ensuring timely replacement based on actual filter condition rather than fixed schedules
Solution Approach 2:
The filter monitoring system automatically tracks its own status and generates replacement alerts without requiring user intervention or manual checking, making the system self-aware of its operational state
2Difficulty of detecting and measuring
If filter blockage detection uses airflow measurement, then blockage can be detected, but detection accuracy is insufficient
Solution Approach 1:
The system replaces mechanical airflow measurement methods with optical sensing technology, using light transmission through the filter to detect blockage levels, which provides more precise and reliable measurements
3Device complexity
If filter blockage detection uses fixed thresholds, then alert generation is simple, but alerts cannot be adjusted to specific user needs
Solution Approach 1:
The alert threshold system transitions from fixed to dynamic and adjustable values, allowing users to customize blockage thresholds based on their specific requirements, with the system adapting to individual user preferences and conditions
4Device complexity
If users must actively check for filter replacement alerts, then the system uses simple communication, but users may miss important notifications
Solution Approach 1:
The system implements active push notification feedback to users through IoT connectivity, automatically delivering alert information to user devices without requiring users to initiate checks, ensuring important notifications are received
Solution Approach 2:
The system introduces an intermediary communication layer using IoT networks and mobile notifications to bridge the gap between the filter monitoring system and users, reliably delivering alerts through intermediate communication channels
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, improving air circulation system efficiency and user compliance by using IoT networks to monitor filter blockage and schedule replacements according to specific user needs.
Implementation Method 1
The control unit turns on the light sources and activates the sensors... The light sensors measure the intensity of light received at the sensors
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.