Inhaler Vibration Accessories for Low-Airflow Data Detection
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Solution Overview
Problem
Existing inhalers face challenges in accurately measuring inhalation data due to weak mechanical oscillations during low airflow, especially in designs that limit oscillation propagation, making it difficult to assess airflow properties using accelerometer-based devices.
Innovation Solution
An accessory with airflow-induced vibration generators and accelerometer sensors that generate mechanical oscillations to measure inhalation data accurately, even in cases of low airflow, ensuring cost-effectiveness and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If accelerometer-based devices are used to measure inhalation data, then inhalation monitoring capability is improved, but measurement precision deteriorates in cases of weak mechanical oscillations during low airflow
Solution Approach 1:
The patent introduces a vibration element that generates mechanical vibrations in response to detected inhalation events. These vibrations are transmitted through the inhaler body to enhance the mechanical oscillations produced during inhalation, making them detectable by the accelerometer even during low airflow conditions. This resolves the contradiction by actively amplifying the weak oscillations that would otherwise be undetectable.
Solution Approach 2:
The vibration element acts as an intermediary between the inhalation event and the accelerometer sensor. It receives the weak mechanical signal from low airflow inhalation and converts/amplifies it into stronger oscillations that can be reliably detected and measured by the accelerometer, thereby improving measurement precision without sacrificing monitoring capability.
2Measurement precision
If airflow-induced vibration generators are added to enhance oscillation detection, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The vibration element is integrated into the existing inhaler body structure, merging the new vibration generation function with the existing mechanical components. The inhaler body itself serves as part of the vibration transmission path, eliminating the need for separate vibration transmission structures and reducing overall device complexity.
Solution Approach 2:
The inhaler body is designed to serve multiple functions: it contains the medication delivery system, acts as a structural housing, and simultaneously serves as a vibration transmission medium. This multi-functionality reduces the need for additional dedicated components for vibration transmission, thereby limiting the increase in device complexity.
3Measurement precision
If vibration elements are integrated into the inhaler body, then measurement precision is improved, but manufacturing cost increases
Solution Approach 1:
The vibration element is designed with adjustable parameters such as mass, stiffness, and damping characteristics that can be optimized during manufacturing. By tuning these parameters, the system achieves reliable vibration generation across different inhaler types and airflow conditions without requiring expensive custom-designed components, thereby controlling manufacturing costs.
Solution Approach 2:
The accessory is designed as a detachable module that can be removed from the inhaler body. This allows the vibration element to be reused across multiple inhaler units, amortizing the manufacturing cost over many devices. The detachable design also simplifies manufacturing by allowing separate production of the accessory and inhaler body.
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 accessory provides highly accurate measurement of inhalation data and airflow properties without increasing cost, supporting various inhaler types, including MDIs, DPIs, and SMIs.
Implementation Method 1
one or more airflow-induced vibration generators configured to generate mechanical oscillations
Implementation Method 2
one or more accelerometer sensors configured to receive, from the airflow-induced vibration generator, the generated mechanical oscillations and configured to generate acceleration signals based on the received mechanical oscillations
Data Source
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AI summary
An accessory (100) for obtaining inhalation data of an inhaler (10) is provided. The accessory is integrally formed with or attached to the inhaler. The accessory comprises: one or more airflow-induced vibration generators (110a, 110b) configured to generate mechanical oscillations. The accessory further comprises a monitoring system comprising one or more accelerometer sensors (135) configured to receive, from the airflow-induced vibration generator, the generated mechanical oscillations and configured to generate acceleration signals based on the received mechanical oscillations. The accessory further comprises an electronic processing unit (350) electrically connected to the accelerometer sensors, configured to receive, from the accelerometer sensor, the generated acceleration signals and configured to extract inhalation data from the received acceleration signal.