Spirometry Encoding Using Mobile Magnetometer and Microphone
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Solution Overview
Problem
Current spirometry testing methods are inefficient and lack the capability to accurately measure lung function using mobile devices, particularly in capturing high rotational speeds of turbine blades during exhalation maneuvers, leading to inaccurate flow rate and volume measurements.
Innovation Solution
The implementation of a spirometric encoding device with a turbine-based system that incorporates magnetic and sound encoding assemblies, coupled with a mobile device, which uses a magnetometer and microphone to capture and process breath data, including Fourier transformations to determine flow rate and volume, and employs techniques like magnetic braking, enlarged turbine blades, and gearing to overcome sampling rate limitations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a turbine-based system is used to measure breath flow rate, then flow rate measurement capability is improved, but the system cannot accurately capture high rotational speeds of turbine blades during exhalation maneuvers
Solution Approach 1:
The patent replaces the mechanical measurement approach with magnetic field sensing. A magnet is embedded in the turbine blade, and a magnetometer on the mobile device detects the magnetic field changes as the blade rotates. This substitution allows accurate measurement of high rotational speeds without the limitations of mechanical encoding assemblies, directly resolving the contradiction between measuring high speeds and maintaining measurement accuracy.
2Ease of operation
If a mobile device is used for spirometry testing, then accessibility and portability are improved, but the device lacks the capability to accurately measure lung function
Solution Approach 1:
The patent makes the mobile device serve multiple functions: it acts as both the user interface and the measurement instrument. The mobile device's existing sensors (magnetometer, microphone, camera) are utilized for spirometry measurements, eliminating the need for dedicated medical equipment while maintaining accessibility. This universal application resolves the contradiction between portability and measurement capability.
Solution Approach 2:
The patent replaces traditional mechanical spirometry systems with a mobile device-based system using magnetic field sensing and acoustic measurement. The magnetometer detects turbine rotation, the microphone captures breath sounds, and the camera may track visual indicators. This substitution enables accurate lung function measurement using portable, accessible technology.
3Measurement precision
If traditional spirometry equipment is used, then measurement accuracy is maintained, but efficiency and speed of testing are reduced
Solution Approach 1:
The patent replaces bulky traditional spirometry equipment with a compact mobile device system. The magnetic field sensing and acoustic measurement capabilities are integrated into a portable platform that provides comparable measurement accuracy while significantly improving testing efficiency through automated data collection and processing, eliminating manual reading and interpretation steps.
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
This approach enhances the accuracy and efficiency of spirometry testing by effectively measuring breath flow rates and volumes, enabling improved diagnosis and treatment of respiratory conditions, and allows for predictive modeling of patient health over time.
Implementation Method 1
The mobile device can determine flow rate and/or volume data based on the air flow through the spirometric encoding adapter using a magnetometer to measure a first output from the first encoder assembly
Implementation Method 2
The second encoder assembly includes a sound encoder assembly including a click assembly that generates a clicking sound at a rate proportional to a rate of air flow
Data Source
AI summary
Aspects discussed herein relate to spirometers that can be used to measure lung function using a mobile device. A user can breathe into a mouthpiece that forces the user's breath through a spirometric encoding assembly. The spirometric encoding assembly can be coupled to a mobile device using a spirometric encoding adapter. The spirometric encoding assembly can generate one or more outputs based on the user's breath; this data can be measured using one or more sensors of the mobile device. The data captured by the mobile device can be processed to determine the flow rate and/or volume of the user's breath. The flow rate and volume can be used to determine a variety of characteristics of the user's health, lung capacity, and/or for diagnosing medical conditions. A variety of treatment plans can be identified and/or administered based on the diagnosed medical