Air-Filtering Mask With Piezoelectric Sensor Actuation
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Solution Overview
Problem
Portable electronic devices equipped with environmental sensors face challenges in maintaining consistent airflow for real-time monitoring of air quality, leading to long response times and reduced monitoring precision due to natural convection.
Innovation Solution
An air-filtering protection device combining a graphene-doping filtering mask with an actuating and sensing device that circulates air, adjusts flow rates based on air quality, and provides real-time monitoring and notification, enabling immediate protection from poor air quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If environmental sensor is integrated into portable electronic device and relies on natural convection, then device portability is improved, but monitoring response time increases and precision decreases
Solution Approach 1:
The patent employs a fan-driven forced convection system to replace natural convection. The fan actively circulates air through the sensor chamber, ensuring consistent and controlled airflow that significantly reduces monitoring response time while maintaining device portability.
Solution Approach 2:
The device pre-heats or pre-cools the circulating air before it reaches the sensor, and pre-positiones the airflow path to ensure immediate sensor activation. This preliminary preparation of air conditions and flow paths minimizes delay when monitoring begins.
2Adaptability or versatility
If environmental sensor is integrated into portable electronic device, then device functionality is improved, but monitoring precision and consistency deteriorate due to inconsistent airflow
Solution Approach 1:
A fan-driven forced convection system is implemented to replace unreliable natural convection. This active airflow generation ensures consistent, controlled, and measurable air circulation through the sensor chamber, significantly improving monitoring precision and reliability while maintaining device portability.
Solution Approach 2:
The system incorporates sensors to monitor airflow characteristics and provides feedback to a control unit. This feedback mechanism allows real-time adjustment of fan speed and airflow patterns to maintain optimal and consistent conditions for accurate environmental monitoring.
3Measurement precision
If air circulation is enforced by actuating device, then air quality monitoring is improved, but energy consumption increases
Solution Approach 1:
The fan operation is made dynamic rather than static. The fan speed and airflow rate are continuously adjusted based on real-time air quality readings, ambient conditions, and sensor requirements. This dynamic operation ensures adequate airflow for accurate monitoring while minimizing energy consumption during low-pollution periods.
Solution Approach 2:
The system changes operational parameters such as fan speed, airflow rate, and sensor sampling frequency based on detected air quality levels. During low-pollution conditions, parameters are reduced to save energy, while during high-pollution events, parameters are optimized for maximum monitoring accuracy.
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 device ensures precise and timely monitoring of air quality, adjusts airflow to maintain safe conditions, and provides real-time notifications for filter replacement, effectively preventing health impacts from air pollution.
Implementation Method 1
the actuating device comprises a piezoelectric actuator, a diaphragm and a guiding channel
Implementation Method 2
The filtering mask is made of a graphene-doping material and is adapted to be worn to filter air
Data Source
AI summary
An air-filtering protection device includes a filtering mask and an actuating and sensing device. The filtering mask is made of a graphene-doping material and wearable to filter air and includes a first coupling element. The actuating and sensing device includes a second coupling element. The second coupling element is engaged with the first coupling element of the filtering mask for allowing the actuating and sensing device to be detachably mounted on the filtering mask. The actuating and sensing device includes at least one senor, at least one actuating device, a microprocessor, a power controller and a data transceiver. The at least one actuating device is disposed on one side of the at least one sensor and includes at least one guiding channel. The actuating device is enabled to transport an air to flow toward the sensor through the guiding channel so as to make the air sensed by the sensor.