Fiber Optic Debris Detection System for Hybrid Bearings
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Solution Overview
Problem
Current debris detection systems, particularly in the aerospace industry, face challenges in accurately detecting non-metallic particles from hybrid bearings, as existing technologies are often limited by material composition and require routine maintenance, and there is a need for 'on-condition' maintenance solutions that can operate effectively without being saturated by particle buildup.
Innovation Solution
A fiber optic-based debris detection system that uses a flow-through chamber with an optical fiber, collimator, and reflector to measure light signal amplitude blocked by particles, allowing for size detection without material composition dependence, and includes an electronic control unit for real-time monitoring and analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If capturing sensors are used to detect particles, then particle detection capability is improved, but the sensor becomes saturated by particle buildup requiring routine maintenance
Solution Approach 1:
The patent extracts the particles from the sensor system by using a flow-through chamber that allows particles to pass through the measurement zone and exit, rather than being captured and retained on the sensor. This eliminates particle buildup and saturation issues while maintaining detection capability through continuous particle flow and measurement.
2Ease of operation
If flow-through debris monitors are used, then routine maintenance is eliminated, but particle inspection capability is lost
Solution Approach 1:
The patent replaces mechanical particle capture and inspection systems with an optical measurement system. Light from an optical fiber passes through the flow chamber, and particles are detected by measuring light attenuation or scattering as they pass through, eliminating the need for mechanical capture while preserving detection and inspection capabilities.
3Measurement precision
If existing debris detection technologies are used, then detection capability is provided, but detection of non-metallic particles from hybrid bearings is limited
Solution Approach 1:
The patent creates a universal particle detection system based on optical principles that can detect all particle types regardless of material composition. The flow-through chamber with optical fiber and light source measures particle presence and size through light interaction, making the system adaptable to detecting metallic, non-metallic, ferrous, and non-ferrous particles from various sources including hybrid bearings.
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 accurate detection of particle size and presence independent of material composition, supports 'on-condition' maintenance, and operates effectively in high-temperature environments without routine maintenance needs, suitable for hybrid bearings and other mechanical-fluid configurations.
Implementation Method 1
an optical fiber... to measure light signal amplitude blocked by particles
Implementation Method 2
collimator... configured to channel light from a light path
Implementation Method 3
reflector configured to reflect light from the light path back towards the collimator
Data Source
Figure 1~3
Figure 4
AI summary
A system (10) for detecting particles in fluids comprising a chamber (20) configured to permit particles (P) to pass through the chamber (20); a fiber optic cable (40, 120, 150, 250) providing a light path (80); a collimator (60) configured to channel light from the light path (80) into the chamber (20); and a reflector (70) configured to reflect light back to the collimator (60) for signal detection. In embodiments, the reflector (70) may include a mirror. Methods for detecting particles and information and/or parameters associated with particles, including that associated with reflected light, are disclosed.