Weighing Apparatus Suction Unit for Pharmaceutical Filling Lines
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Solution Overview
Problem
Existing weighing apparatuses in pharmaceutical, medical, and food sectors face precision and repeatability issues due to environmental factors like laminar air flow, which can generate measurement errors from micro-vortices and turbulences, despite efforts to compensate with software.
Innovation Solution
A weighing apparatus and method that incorporates a suction unit to generate a controlled sucked air flow interacting with a laminar air flow within a protective structure, ensuring precise and repeatable weight measurements by adjusting the air flow to minimize measurement errors caused by environmental interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a laminar air flow is generated from top down to protect the sterile environment, then contamination is reduced, but measurement precision deteriorates due to micro-vortices and turbulences
Solution Approach 1:
The air flow system is segmented into two distinct components: a laminar flow generating unit that provides overall sterile protection, and a suction unit that creates localized controlled air flow around the weighing unit. This segmentation allows each component to perform its specific function without interfering with the other, resolving the contradiction between contamination protection and measurement precision.
Solution Approach 2:
The suction unit creates a localized controlled air flow environment specifically around the weighing unit, while the laminar flow continues to provide general sterile protection. By applying different air flow qualities to different locations (local controlled flow at weighing area, global laminar flow for sterility), the system achieves both contamination protection and measurement precision.
2Measurement precision
If software compensation is used to correct measurement errors, then measurement precision improves, but reliability deteriorates because the error is not constant and repeatable
Solution Approach 1:
The suction unit intentionally creates a controlled air flow that generates a consistent, repeatable measurement error. This controlled error is then compensated for through calibration, converting the harmful effect of air flow interference into a beneficial situation where the error is predictable and correctable, thereby improving both precision and reliability.
Solution Approach 2:
By changing the air flow parameters through the suction unit, the system creates a consistent disturbance pattern that can be calibrated and compensated. The controlled modification of air flow conditions transforms unpredictable measurement errors into predictable, compensatable variations, enhancing measurement reliability.
3Measurement precision
If environmental factors are monitored and eliminated via software, then measurement precision improves, but device complexity increases
Solution Approach 1:
The suction unit extracts and controls the air flow environment around the weighing unit, separating the measurement environment from the general sterile environment. This extraction allows independent control of measurement conditions without affecting the overall system, reducing the need for complex software monitoring of environmental factors.
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 solution provides reliable and accurate weight detection by creating a controlled atmosphere, allowing for precise and repeatable error compensation, enhancing the reliability of weight measurements in the presence of environmental disturbances.
Implementation Method 1
generating a laminar air flow forced from the top down, which strikes the line components and exits
Implementation Method 2
at least one suction unit designed to generate a sucked air flow directed in such a way that it affects the weighing unit
Data Source
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AI summary
A weighing apparatus for a filling line (70) for filling containers (12) of pharmaceutical, medical, food products or similar, comprising a weighing unit (20) and a suction unit (14) designed to generate a sucked air flow directed and adjusted in such a way as to affect in a controllable way the value of a weight detected by said weighing unit (20).