Microphone-Based Airflow Sensor for Multi-Mode Measurement
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Solution Overview
Problem
Traditional airflow sensors are not versatile and require separate sensors for inhalers, spirometers, and peak flow meters, increasing costs and limiting functionality.
Innovation Solution
A versatile airflow sensor with a housing, mounting means, measurement microphone, data converter module, and additional features like a display and communication means, enabling adaptability across different devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional airflow sensors are designed for specific device types (inhalers, spirometers, peak flow meters), then measurement accuracy for each device is improved, but device versatility deteriorates and costs increase
Solution Approach 1:
The airflow sensor is designed with a universal mounting system that can be attached to different tube configurations (inhaler tubes, spirometer tubes, peak flow meter tubes) through a standardized housing structure. This allows a single sensor design to serve multiple device types, eliminating the need for device-specific sensors while maintaining measurement accuracy through software configuration for each application.
2Reliability
If separate sensors are used for each device type, then device-specific functionality is optimized, but overall system complexity and cost increase
Solution Approach 1:
A single airflow sensor design with configurable software modes can replace multiple device-specific sensors. The sensor includes a housing that accommodates different tube configurations and a controller that can be programmed for different measurement modes (inhaler mode, spirometer mode, peak flow meter mode), thereby reducing the total number of sensor types needed while maintaining reliable performance across all applications.
Solution Approach 2:
The sensor system maintains device-specific performance through software parameter configuration rather than hardware changes. The controller can be programmed with different measurement parameters, thresholds, and processing algorithms appropriate for each device type, allowing one physical sensor to adapt its behavior to match the requirements of different applications without compromising reliability.
3Measurement precision
If multiple device-specific sensors are maintained, then each device receives optimized measurement capability, but cost and storage requirements increase
Solution Approach 1:
The invention enables a single airflow sensor to replace multiple device-specific sensors through its universal mounting system and configurable controller. The housing design allows attachment to various tube configurations, and the controller can be programmed for different measurement modes, thereby reducing the quantity of sensors needed from multiple device-specific units to a single versatile unit that can serve all applications.
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
Enhances versatility, accuracy, and utility by providing precise airflow measurements and reducing the need for multiple sensors, facilitating integration into broader health monitoring frameworks.
Implementation Method 1
The airflow sensor includes at least one measurement microphone for capturing audio signals of airflow within the tube to which the housing is connected
Data Source
Figure 1A~1B
Figure 2
Figure 3A~3B
AI summary
An airflow sensor (10) comprising: a housing (11) with mounting means (12) for attaching the airflow sensor (10) to a tube (31, 41, 51) within which airflow is to be measured; at least one measurement microphone (15A) for capturing audio signals of airflow within the tube to which the housing (11) is connected; and a controller (20) with a data converter (21) module for converting audio data collected by the measurement microphone (15A) into data representative of the airflow, wherein the converter (21) is configured to convert data according to at least two of the following modes of operation: a PMDI inhaler mode, a spirometer mode, a peak flow meter mode, a mouth-nasal flow mode.