Magnetic Piston Pump Stroke Timing from Coil Current Difference

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Solution Overview

Problem

Existing methods for monitoring the operation of magnetic piston pumps require significant computational effort without providing reliable data, making them inefficient for effective operational monitoring.

Innovation Solution

A method that determines the start and/or end of the stroke movement in a magnetic piston pump by measuring and recording the actual coil current, calculating the difference between a stored coil current and the actual coil current, and evaluating this difference to accurately determine the movement times, thereby reducing computational effort and improving reliability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If complex computational methods are used to determine piston movement timing, then measurement precision may improve, but computational effort increases significantly

Engineering Contradiction:
Improvepiston movement timing detection accuracyVSAvoidcomputational complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The patent extracts only the essential information needed for timing detection from the coil current signal. Instead of performing complex computational analysis of the entire current curve, the method identifies specific characteristic points (current maximum, zero crossings) that directly correlate with piston movement timing, thereby reducing computational complexity while maintaining measurement precision.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The patent inverts the conventional approach by not trying to reconstruct the complete mechanical movement from complex current analysis, but rather using simple current characteristics to directly determine timing points. This inversion simplifies the computational process while preserving the essential measurement accuracy needed for monitoring.

Inventive Principle:
Principle #13The other way round (Inversion)

2Device complexity

If simple monitoring methods are used, then computational effort is reduced, but reliability of monitoring data deteriorates

Engineering Contradiction:
Improvecomputational complexityVSAvoidmonitoring data reliability
Core Design Contradiction:
Device complexityVSReliability

Solution Approach 1:

The patent implements feedback by continuously monitoring coil current characteristics and using them to verify piston movement timing. The system compares detected timing points against expected operational patterns, providing reliable monitoring data through this feedback mechanism while keeping computational requirements manageable.

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The patent performs preliminary identification of characteristic current points during normal operation to establish baseline timing data. This preliminary action enables reliable monitoring by having reference timing information available before actual monitoring begins, allowing for comparison and anomaly detection without requiring complex real-time computation.

Inventive Principle:
Principle #10Preliminary action

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 method allows for reliable monitoring of the magnetic piston pump's operation by accurately determining the start and end of the stroke movement, reducing the risk of errors, and minimizing computational complexity, thus enhancing operational efficiency and data reliability.

Implementation Method 1

a magnet armature arranged on the piston by means of an electromagnetic field which is generated by energizing at least one coil with a coil current

Methodology Applied
Scientific EffectElectromagnetic field: Electromagnetic Induction

Data Source

PatentEP3460241B2Method for monitoring a magnetic piston pump
Publication Date: 2025.06.04 ALBONAIR GMBH
  • EP3460241B2 patent drawingFigure 1a~1b
  • EP3460241B2 patent drawingFigure 2
  • EP3460241B2 patent drawingFigure 3

AI summary

The invention relates to a method for monitoring the operation of a magnetic piston pump (1) in which a piston (2) performs an electromagnetically driven stroke movement with a start and end point, wherein the stroke movement is initiated by a magnetic armature (3) arranged on the piston (2) by means of an electromagnetic field generated by energizing at least one coil (4) with a coil current, wherein the energizing has a switch-on time and a switch-off time, wherein the start (ta) and/or the end (teA, teB, teC) of the stroke movement is determined by the following steps: - measuring and recording the actual coil current; - calculating and recording a difference (la; le) between a stored coil current and the actual coil current starting from the switch-on time of the energizing over a defined period;- Evaluation of this difference to determine the start (ta) and/or end (teA, teB, teC) of the electromagnetically driven lifting motion.;