Fluid Inspection Imaging With Magnetic Particle Separation
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Solution Overview
Problem
Conventional fluid monitoring systems, such as those for lubricating oils, struggle with inaccurate detection of ferromagnetic and non-ferromagnetic particles due to distortion and interference, leading to incomplete health assessments of machinery, and lack early detection of viscosity changes.
Innovation Solution
A system and method that applies a magnetic field to attract and remove ferromagnetic particles from the detection area, allowing for precise counting and classification of both types of particles, while simultaneously measuring fluid viscosity using a magnetoelastic sensor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a magnetic field is applied to attract ferromagnetic particles from the detection area, then the accuracy of particle classification is improved, but the system complexity increases due to additional magnetic means and dual imaging requirements
Solution Approach 1:
The detection process is segmented into two distinct phases: first capturing all particles (ferromagnetic and non-ferromagnetic) together, then capturing only non-ferromagnetic particles after magnetic separation. This segmentation allows accurate classification by comparing the two images to identify which particles were removed by the magnetic field.
Solution Approach 2:
The magnetic field is used to extract or remove ferromagnetic particles from the detection area during the second imaging phase. By taking out the ferromagnetic particles selectively, the system can then count and classify non-ferromagnetic particles without interference, improving measurement precision.
2Measurement precision
If off-line laboratory analysis is used to monitor lubricating oil, then measurement precision is improved, but productivity decreases due to frequent sampling and production time loss
Solution Approach 1:
The patent replaces manual mechanical sampling and laboratory analysis with an automated optical imaging system that captures particle images directly in the fluid flow. This substitution eliminates the need to stop production for sampling and sends particles to a laboratory, thereby maintaining measurement precision while significantly improving productivity.
Solution Approach 2:
The system enables continuous monitoring of fluid particles as they flow through the detection area, rather than discrete periodic sampling. The imaging system continuously captures particle images, allowing real-time analysis without interrupting the fluid flow or production process, thus maintaining both precision and productivity.
3Productivity
If high velocity fluid flow is inspected, then productivity is improved, but measurement precision deteriorates due to particle distortion and incomplete capture
Solution Approach 1:
The lighting system operates periodically with short-duration light pulses that are synchronized with the image capture system. This periodic illumination freezes the motion of fast-moving particles during the brief exposure time, preventing motion blur and distortion while allowing continuous flow at high velocity, thus maintaining both productivity and measurement precision.
Solution Approach 2:
The system is designed to dynamically adapt to high-velocity flow conditions by using synchronized pulsed lighting and rapid image capture. The timing of the light pulses and camera shutter are coordinated to capture sharp images of particles moving at high speed, allowing the system to maintain measurement precision while inspecting fluid at productive flow rates.
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
Accurately assesses the health state of machinery by distinguishing ferromagnetic and non-ferromagnetic particles and determining viscosity, enabling early detection of potential failures.
Implementation Method 1
magnetic means for generating a magnetic field towards the image fluid under inspection, such that ferromagnetic particles comprised in the fluid under inspection are prevented from reaching the image detection area
Implementation Method 2
measuring means for measuring viscosity
Data Source
AI summary
A system for inspecting a fluid includes a lighting system for illuminating a fluid under inspection in an image detection area; an image capture system for capturing a sequence of images of the fluid in the image detection area; a magnetic component for generating a magnetic field towards the image fluid under inspection, the magnetic component having at least one coil for generating a magnetic field, whereby ferromagnetic particles in the fluid under inspection are prevented from reaching the image detection area; wherein the image capture system is configured to capture an image of the fluid in the image detection area before the magnetic field is applied and an image of the fluid in the image detection area after the magnetic field is applied, free of ferromagnetic particles; and a processing component configured to compare the images of the fluid under inspection and count the ferromagnetic particles in the fluid.