Inhaler Resistance Measurement Closed-Loop System
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Solution Overview
Problem
Existing methods for measuring the resistance of inhalers to airflow are cumbersome, involve multiple steps, and are susceptible to variations in ambient conditions, making them inefficient and prone to errors.
Innovation Solution
A closed-loop system comprising a pressure controller, flow controller, microprocessors, and sensors that measure pressure differential and flow rate across an inhaler in a controlled environment, using a sealed airflow pathway to determine resistance values with high accuracy and ease of use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If existing methods for measuring inhaler resistance are used, then the measurement process can be completed, but the process is cumbersome and involves multiple steps
Solution Approach 1:
The patent combines multiple measurement functions into a single integrated apparatus. The flow generator, pressure transducers, flow meter, and computer are merged into one system that performs all necessary measurements simultaneously in a single test setup, eliminating the need for multiple separate steps and procedures
Solution Approach 2:
The apparatus is designed as a universal measurement system that can test different inhaler types and configurations using the same equipment. The system performs multiple functions including flow rate measurement, pressure differential measurement, and resistance calculation all through one integrated platform
2Measurement precision
If existing measurement methods are used, then resistance can be measured, but the results are subject to variations in ambient conditions
Solution Approach 1:
The patent creates a controlled test environment that isolates the inhaler from ambient air conditions. The system uses a closed circuit with controlled atmosphere where the inhaler is tested under standardized conditions, eliminating the influence of external temperature, pressure, and humidity variations
Solution Approach 2:
The system continuously monitors pressure differentials and flow rates using transducers and provides real-time feedback to the computer, which automatically adjusts and compensates for any variations, ensuring consistent and accurate resistance measurements regardless of external conditions
3Productivity
If existing methods are used, then measurements can be obtained, but they require numerous steps and calculations
Solution Approach 1:
The patent replaces manual calculations and mechanical measurement procedures with automated electronic systems. The computer automatically processes data from pressure transducers and flow meters, performing resistance calculations electronically without requiring manual intervention or complex computational 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
The system provides rapid, accurate, and reproducible measurements of inhaler resistance, eliminating environmental variables and reducing errors, while being adaptable to different inhaler designs and materials.
Implementation Method 1
a pressure sensor configured to measure pressure differential across an inhaler
Implementation Method 2
a laminar flow sensor configured to measure the flow rate of airflow within the chamber
Implementation Method 3
a vacuum pump; a flow controller or flow regulator which is configured to connect to a positive air pressure generator
Implementation Method 4
a flow controller or flow regulator which is configured to connect to a positive air pressure generator
Data Source
AI summary
An apparatus, a closed-loop system and method for measuring the resistance of inhalation systems and/or devices are disclosed.