Parallel Electrode Milk Flow Measurement for Foam-Induced Inaccuracy
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Solution Overview
Problem
Current milk flow measurement techniques face challenges due to the foaming nature of milk and periodic flow patterns, leading to inaccuracies in determining the mass flow during milking, especially with high foam proportions and varying electrical conductivity.
Innovation Solution
A device with at least two electrodes and an analysis means connected in parallel, measuring the integral density profile of the fluid rather than fill height, allowing for continuous and precise measurement of milk flow, including foam portions, without the need for complex mechanical or electronic components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If volumetric methods are used to measure milk flow, then the measurement process is simple, but the accuracy is limited due to foam formation
Solution Approach 1:
The patent replaces mechanical/volumetric measurement systems with an electrical measurement system. Two electrodes measure the electrical conductivity of the milk flow, which correlates with milk density and flow rate. This electrical approach avoids the foam-related inaccuracies of volumetric methods while maintaining simplicity.
Solution Approach 2:
The patent changes the measurement parameter from volume (which is affected by foam) to electrical conductivity (which is not affected by foam). By measuring the electrical properties of the milk rather than its physical volume, the system achieves accurate measurement despite foam formation during milking.
2Measurement precision
If electrical conductivity measurement is used, then measurement accuracy improves, but reliability decreases due to conductivity variations
Solution Approach 1:
The patent employs a feedback mechanism where the measured electrical conductivity values are continuously monitored and used to adjust or validate the milk flow measurement. This feedback loop compensates for variations in conductivity caused by different milk compositions, temperatures, or foam content, thereby maintaining measurement reliability.
Solution Approach 2:
The system dynamically adjusts measurement parameters based on the detected electrical conductivity. When conductivity variations indicate changes in milk composition or foam content, the system modifies its measurement approach or applies correction factors to maintain consistent and reliable measurements across varying conditions.
3Device complexity
If periodic milk flow measurement is attempted, then the measurement system is simpler, but measurement precision deteriorates due to pulsating flow
Solution Approach 1:
The patent implements continuous measurement rather than periodic sampling. The electrodes continuously monitor the electrical conductivity of the milk flow, capturing the pulsating nature of milk ejection in real-time. This continuous action provides accurate data for each pulse while maintaining simple device architecture.
Solution Approach 2:
The electrical measurement system naturally captures pulsating flow patterns without requiring complex mechanical sensors or flow meters. The electrical conductivity measurement automatically follows the pulsating milk flow, providing precise measurement of each ejection phase without adding device complexity.
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 high accuracy in measuring milk flow, independent of conductivity and temperature variations, enabling reliable and efficient monitoring of milk yield, even during low milk flows, and reducing the need for frequent calibration.
Implementation Method 1
measuring the integral density profile of the fluid rather than fill height
Data Source
AI summary
The invention relates to a device for measuring the mass flow, in particular of a foaming liquid, comprising a measuring device with two electrodes and at least one electrical means for generation of an electrical parameter and an analytical device. The electrical means is connected to the first electrode at two remote points, such as to be wired in parallel with the first electrode. The second electrode is connected to the first electrode by means of the analytical device.