Mastitis Detection via Milk Capacitance Phase Shift
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Solution Overview
Problem
Current methods for detecting mastitis in dairy cows are inadequate, as they often fail to detect pre-clinical mastitis and do not provide real-time results, especially in robotic milking systems where severe cases may go unnoticed until they spread to multiple quarters.
Innovation Solution
A system that integrates with milking equipment to non-invasively detect mastitis by measuring the capacitance of milk using electrical probes positioned within the teat cups or collection lines, analyzing the phase shift between voltage and current signals to identify changes in milk composition indicative of mastitis, and providing real-time data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional observation methods are used to detect mastitis, then the system is simple and easy to operate, but pre-clinical mastitis cannot be detected and detection occurs only when the disease is severe
Solution Approach 1:
The patent replaces mechanical/visual observation methods with electrical measurement methods. Electrical probes measure capacitance of milk to detect mastitis, substituting the mechanical system of visual inspection with an electrical field-based measurement system that can detect pre-clinical conditions through changes in milk's electrical properties
Solution Approach 2:
The patent introduces milk capacitance as an intermediary parameter for disease detection. Instead of directly observing clinical symptoms, the system measures the electrical capacitance of milk, which serves as a mediator that reflects changes in milk composition caused by mastitis, enabling early detection before clinical symptoms appear
2Measurement precision
If near infra-red spectroscopy is used to analyze milk, then detection of mastitis is possible, but the system requires complex spectral analysis equipment and does not provide real-time results during milking
Solution Approach 1:
The patent replaces complex optical spectroscopy systems with simple electrical capacitance measurement systems. Instead of using near infra-red sensors and spectral analysis equipment, the invention uses electrical probes to measure milk capacitance, dramatically simplifying the hardware while maintaining detection capability
Solution Approach 2:
The patent changes the measurement parameter from optical spectral properties to electrical capacitance properties. By measuring the electrical capacitance of milk rather than its spectral signature, the system achieves mastitis detection with much simpler equipment and provides real-time results during the milking process
3Measurement precision
If electrical conductance is measured to detect mastitis, then detection is possible, but the measurement does not optimize capacitance as an indicator and lacks real-time capability
Solution Approach 1:
The patent changes the electrical measurement parameter from conductance to capacitance. By measuring capacitance rather than conductance, the system achieves better sensitivity for detecting pre-clinical mastitis and enables real-time measurement during milking, as capacitance can be measured without interrupting milk flow
Solution Approach 2:
The patent enables continuous measurement of milk capacitance throughout the milking process. The electrical probes remain in contact with milk continuously, allowing real-time detection without interrupting the milking operation, thus eliminating the time loss associated with discrete sampling and analysis
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 early detection of mastitis in individual quarters before it spreads, reducing economic losses by providing timely intervention and improving milk quality and production.
Implementation Method 1
measuring the capacitance of milk using electrical probes positioned within the teat cups or collection lines, analyzing the phase shift between voltage and current signals
Data Source
Figure 1~2
Figure 3
Figure 4a
AI summary
The invention provides a milking system (20) for detecting disease in a mammal, comprising: teat cups (26, 27), each teat cup in fluid communication with a teat line (30-33), probes (100, 102, 104, 106) being in contact with milk in the system, the system further comprising means (50-53, 60) for supplying AC current to said probes at a frequency of greater than 60 megahertz, and means (70) for measuring a shift in phase angle between voltage and current signals while AC current is applied to said probe that results from the milk.