LED Optical Detection for Fluid Contaminants
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Solution Overview
Problem
Current methods for detecting irregularities in slurries, transformer mineral oil, and aircraft engine oil are costly and inefficient, as they rely on ultrasonic testing or turbidity sensors that fail to detect certain contaminants like ceramic shards or air bubbles, posing risks to equipment performance and safety.
Innovation Solution
A system utilizing a light-emitting diode (LED) and multiple light detectors positioned within and around a chamber to emit and detect light, determining the presence and properties of materials in gases and fluids by measuring light intensity, reflection, refraction, and transmission, without the need for ultrasonic pulses, and correcting for temperature effects using carbon black and titanium dioxide coatings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If ultrasonic testing is used to detect irregularities in slurry, then detection capability is improved, but equipment cost increases
Solution Approach 1:
The patent replaces the mechanical ultrasonic testing system with an optical detection system using LED and photodetector. The optical system measures light transmission through the slurry to detect irregularities, eliminating the need for expensive ultrasonic equipment while maintaining detection capability.
Solution Approach 2:
The patent uses inexpensive LED and photodetector components instead of expensive ultrasonic generators and sensors. These optical components are significantly cheaper while providing sufficient detection capability for slurry quality monitoring.
2Measurement precision
If turbidity sensors are used to detect contaminants in oil, then detection of certain particles is improved, but detection of ceramic shards fails
Solution Approach 1:
The patent changes the detection parameter from turbidity (light scattering) to light transmission intensity. By measuring how much light passes through the oil sample, the system can detect ceramic shards and other contaminants that do not significantly affect turbidity, thereby improving detection reliability across different contaminant types.
3Measurement precision
If multiple light detectors are positioned at different locations, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent designs the light detector system so that detectors at different positions serve multiple functions: they can individually measure light transmission, collectively determine material properties through comparison, and adapt to different measurement scenarios. This multi-functionality justifies the increased complexity by providing comprehensive analytical capability.
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 cost-effective and accurate detection of contaminants in various fluids, improving the reliability of slurry quality, transformer insulation, and aircraft engine oil performance, while preventing potential failures and safety hazards.
Implementation Method 1
measuring light intensity, reflection, refraction, and transmission
Implementation Method 2
measuring light intensity, reflection, refraction, and transmission
Implementation Method 3
measuring light intensity, reflection, refraction, and transmission
Implementation Method 4
correcting for temperature effects using carbon black and titanium dioxide coatings
Data Source
AI summary
An apparatus, a system and a method use a light-emitting diode (LED) to identify the presence of a material in a gas and/or a fluid and/or to determine properties of the material. The LED and a light detector may be used to determine a chemical compound in the material. The gas and/or the fluid may be located in a chamber. A first light detector may be positioned on the opposite side of the chamber relative to the LED, a second light detector may be positioned on the same side of the chamber as the LED, and/or a third light detector may be positioned inside the chamber. Additional light detectors with coatings may enable measurements to be corrected for the effects of temperature. The light detectors may determine light reflection, light refraction, light transmission, light diffraction, light interference, light diffusion, light collimation, light absorption and/or light focusing of the material.