Inductor Arrangement for Stirring and Flow Detection
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Solution Overview
Problem
Automatic chemical detection systems face challenges in ensuring the presence and proper functioning of a magnetic stirring bar, and in efficiently detecting fluid flow without the need for costly and space-consuming flow meters.
Innovation Solution
An electromagnetic stirring and detecting system that uses a magnetic stirring bar and an inductor arrangement to generate a magnetic field for stirring and to detect signals indicative of the stirring bar's presence and fluid flow, allowing for dual-use of the inductor arrangement for both stirring and detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a float switch or dedicated flow meter is used for sample flow detection, then flow detection capability is improved, but device cost and space requirements increase
Solution Approach 1:
The inductor arrangement is designed to serve dual purposes: generating magnetic fields for stirring the liquid sample and detecting fluid flow through induced signals. This multi-functionality eliminates the need for separate flow detection equipment, thereby reducing device cost and space requirements while maintaining flow detection capability
Solution Approach 2:
The patent combines the stirring function and flow detection function into a single inductor arrangement. The same component that stirs the sample also detects flow by monitoring induced signals from the stirring bar's motion, merging two previously separate functions into one integrated system
2Ease of operation
If mechanical stirring apparatus is used, then stirring function is improved, but reliability of stir bar presence monitoring deteriorates
Solution Approach 1:
The inductor arrangement continuously monitors the stirring bar's presence and motion by detecting induced signals. This feedback mechanism allows the system to verify that the stirring bar is present and functioning, improving reliability while maintaining the mechanical stirring function
Solution Approach 2:
The stirring bar itself serves dual purposes: it performs the stirring function and simultaneously acts as a indicator for its own presence. The magnetic stirring bar's motion induces signals in the inductor arrangement, allowing the system to self-monitor without requiring separate sensors
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 system enables reliable detection of the magnetic stirring bar and fluid flow, optimizing detection conditions and reducing the need for additional flow detection equipment, thereby enhancing the efficiency and accuracy of chemical analysis.
Implementation Method 1
The at least one inductor is configured to generate a magnetic field for inducing a motion of rotation of the magnetic stirring bar having an inertia of rotation
Implementation Method 2
the at least one inductor is configured to detect a first measuring signal induced by the inertia of rotation of the magnetic stirring bar
Data Source
AI summary
An electromagnetic stirring and detecting system includes a magnetic stirring bar that is arrangeable in a measuring cell and configured to be rotatable for agitating a fluid in the measuring cell, and an inductor arrangement that comprises at least one inductor. The at least one inductor generates a magnetic field for inducing a motion of rotation of the magnetic stirring bar having an inertia of rotation in a driving mode. The at least one inductor detects a first measuring signal induced by the inertia of rotation of the magnetic stirring bar and is indicative of a presence of the magnetic stirring bar and/or a second measuring signal that is indicative of a presence of a fluid flow into or through the measuring cell during a detecting mode.