Aerodynamic Input Enclosure for Stable Weighing in Flow Hoods
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The placement of input devices like scanners and cameras in the upstream airflow vicinity of a scale in medication preparation systems creates airflow disturbances, leading to inconsistent pressure and turbulent flow conditions, which can result in inaccurate and unstable weight measurements, compromising the preparation of sterile pharmaceutical compounds.
Innovation Solution
An aerodynamically streamlined enclosure is designed to house input devices, featuring a curved front profile and positioned above the scale, minimizing airflow disruption and maintaining a clean environment, thereby allowing stable and accurate gravimetric readings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If input devices are placed in the upstream airflow vicinity of the scale, then the devices can be positioned for optimal functionality and documentation, but airflow disturbances occur causing inconsistent pressure and turbulent flow conditions that result in inaccurate and unstable weight measurements
Solution Approach 1:
The enclosure housing is designed with a curved, aerodynamically streamlined profile that allows airflow to transition smoothly around the input devices. This curved geometry eliminates sharp edges and corners that would create turbulence, enabling the input devices to remain in the upstream vicinity of the scale while maintaining stable laminar flow conditions and accurate weight measurements.
2Reliability
If a larger enclosure is used to house the input devices, then the devices are better protected and housed, but the flow disturbance increases affecting the scale's stability and accuracy
Solution Approach 1:
The enclosure employs a streamlined, curved aerodynamic profile that minimizes the disruption to laminar airflow. This curved design allows the enclosure to be sufficiently large to house and protect input devices while maintaining smooth airflow transition, preventing turbulence and preserving airflow stability in the vicinity of the scale.
3Ease of operation
If the enclosure is positioned closer to the scale, then the input devices are in optimal position for documentation, but the flow disturbance has a greater impact on measurement stability
Solution Approach 1:
The aerodynamically streamlined enclosure with its curved profile enables the input devices to be positioned close to the scale for optimal documentation capability. The curved geometry ensures that airflow moves smoothly around the enclosure without creating turbulence, allowing the scale to stabilize quickly and maintain measurement accuracy even when the enclosure is in close proximity.
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 streamlined enclosure ensures accurate and stable weight measurements (+/â0.05 g with stabilization in no more than 2 additional seconds, while maintaining a clean environment, reducing the risk of contamination and improving the reliability of medication preparation.
Implementation Method 1
The enclosure housing has a curved front profile to minimize flow disturbance when the system is positioned within a flow hood
Implementation Method 2
The preparation of sterile pharmaceutical compounds typically takes place in a flow hood that provides an air stream to create a clean zone
Data Source
AI summary
A system for preparing a pharmaceutical compound comprises: a scale having a platen configured for placement of an object thereon; a supporting arm comprising a first end coupled to a portion of the scale and a second end extending to a position above the platen of the scale; and an enclosure housing extending from the second end of the supporting arm and configured to house at least one input device. The enclosure housing has a curved front profile to minimize flow disturbance when the system is positioned within a flow hood.