Debris Sensor with Segmented Magnetic Zones
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Solution Overview
Problem
Conventional debris sensors face challenges in accurately detecting and measuring ferrous, conductive non-ferrous, and non-conductive particles in lubrication fluids due to saturation limits and interference from particle buildup, which affects measurement accuracy and precision.
Innovation Solution
The debris sensor design includes a body with a ferrous particle sensor, a magnetic chip collector, multiple magnets, and a non-ferrous particle sensor, configured to minimize ferrous particle attraction, capture particles, and detect conductive and non-conductive particles using coils and magnetic fields, with a screen for capturing remaining particles and a monitoring unit for data analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional debris sensors are used to detect particles in lubrication fluid, then particle detection capability is provided, but saturation limits and particle buildup occur which reduce measurement accuracy and precision
Solution Approach 1:
The sensor is divided into multiple sensing zones with different magnetic field strengths. Ferrous particle sensors are positioned in regions with stronger magnetic fields for effective ferrous particle detection, while non-ferrous particle sensors are positioned in regions with weaker magnetic fields to avoid saturation and false readings from non-ferrous particles.
Solution Approach 2:
Different regions of the sensor have different magnetic field characteristics tailored to detect specific particle types. The magnetic field strength and distribution are locally optimized so that ferrous particles are attracted to specific zones while non-ferrous particles are detected in zones with minimal magnetic attraction, preventing cross-interference and buildup.
2Quantity of substance
If particles are allowed to build up on sensor surfaces for detection, then particle capture capability is improved, but measurement accuracy decreases due to saturation and interference
Solution Approach 1:
The sensor includes separate collection zones for different particle types. Ferrous particles are collected in designated magnetic zones away from the sensing elements, while non-ferrous particles are detected in zones where they can be sensed without significant accumulation. This prevents saturation of the sensing elements while maintaining particle capture capability.
Solution Approach 2:
Ferrous particles are extracted from the fluid stream and collected in separate magnetic collection zones before they can accumulate on the sensing elements. This removal of ferrous particles from the detection path prevents them from interfering with non-ferrous particle detection and maintains measurement accuracy over time.
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 configuration enhances the saturation limit, reduces particle buildup, and allows for precise measurement of particles in three dimensions, improving detection accuracy and preventing false alarms, enabling timely maintenance and preventing complete system failure.
Implementation Method 1
a ferrous particle sensor connected to the body
Implementation Method 2
a plurality of magnets disposed closer to the second end than the magnetic chip collector
Implementation Method 3
a non-ferrous particle sensor connected to the body
Data Source
AI summary
A debris sensor may include a body including a first end and a second end, a ferrous particle sensor connected to the body, and a magnetic chip collector connected to the body at a position closer to the second end than the ferrous particle sensor. A plurality of magnets may be disposed closer to the second end than the magnetic chip collector. A non-ferrous particle sensor may be connected to the body and the non-ferrous particle sensor may be disposed closer to the second end than the plurality of magnets.