Float Gauge Switching Unit Functional Verification via Electromagnetic Actuation
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Solution Overview
Problem
Conventional units for detecting the filling level of liquids in motor vehicles, such as brake fluid or cooling water, lack a reliable method to verify the functional capability of the switching unit, which is crucial for ensuring accurate detection of the liquid level and initiating appropriate assistance measures.
Innovation Solution
Incorporating an energizable magnetic device, such as a coil or electromagnet, to actuate the switching unit independently of the permanent magnet's position, allowing for a simple function test by applying a voltage and detecting the resulting current flow through the switching unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional float gauge with permanent magnet is used to detect liquid level, then the detection function is simple and cost-effective, but the functional capability of the switching unit cannot be verified
Solution Approach 1:
An energizable magnetic device is introduced as an intermediary component to generate a test magnetic field that actuates the switching unit independently of the float gauge's permanent magnet. This allows the switching unit's functionality to be verified by detecting current flow changes when the test magnetic field is applied, without requiring actual liquid level changes.
Solution Approach 2:
The system performs a preliminary function test of the switching unit by applying voltage to the energizable magnetic device before normal operation. This preliminary action verifies whether the switching unit can properly respond to magnetic fields, ensuring reliability before the float gauge's permanent magnet is relied upon for actual liquid level detection.
2Adaptability or versatility
If the switching unit is positioned at a fixed location in the container, then the device structure is simplified, but the switching unit cannot be actuated from multiple positions
Solution Approach 1:
The mechanical approach of moving the permanent magnet to different positions to actuate the switching unit is replaced with an electromagnetic approach. The energizable magnetic device generates a magnetic field at the fixed switching unit location through electrical energization, allowing actuation without physical movement of components.
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
Enables continuous verification of the switching unit's functionality, ensuring reliable detection of the filling level and triggering appropriate responses, such as warning messages, by differentiating between normal and malfunctioning states.
Implementation Method 1
The float gauge carries a permanent magnet, which, when entering a sufficient proximity to the switching unit, actuates the switching unit with the aid of the magnetic field it has generated
Implementation Method 2
at least one energizable magnetic device for generating a magnetic field is assigned to the switching unit, which, when sufficiently energized, generates a magnetic field, which actuates the switching unit
Data Source
AI summary
A unit for detecting a filling level of a liquid in a container. The unit includes at least one float gauge, which carries at least one permanent magnet, and including at least one switching unit, which is actuatable by the permanent magnet and is fastened in or at the container. It is provided that at least one energizable magnetic device for generating a magnetic field is assigned to the switching unit, which, when sufficiently energized, generates a magnetic field, which actuates the switching unit when the switching unit is functional.