Electromagnetic Waveguide Reflectometry for High-Temperature Monitoring
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Solution Overview
Problem
Current methods for monitoring temperatures and physical states of target components, especially in high-temperature environments, are limited by the need for continuous and precise measurement at multiple points, which is not feasible with thermocouples or infrared thermography, and these methods do not allow for detection of physical state modifications.
Innovation Solution
An electromagnetic waveguide with discontinuities is used to inject and analyze incident signals, allowing for the determination of environmental properties by correlating reference and updated reflected signals, enabling continuous and precise monitoring of temperature and physical state changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If thermocouples are used for temperature measurement, then temperature reading is possible, but implementation takes a long time and does not allow continuous monitoring with high density of measurement points
Solution Approach 1:
The patent replaces mechanical thermocouple systems with an electromagnetic waveguide-based reflectometry system. The waveguide with distributed discontinuities acts as a continuous sensor array, eliminating the need for individual thermocouple installations while enabling high-density, continuous temperature monitoring through electromagnetic signal reflection analysis.
Solution Approach 2:
The waveguide is divided into multiple measurement points through distributed discontinuities along its length. Each discontinuity serves as a localized reflection point, effectively segmenting the continuous waveguide into discrete measurement locations without requiring physical separation or individual sensor installation at each point.
2Measurement precision
If infrared thermography is used for temperature measurement, then temperature reading is possible, but it is only possible at locations that are visually accessible by an infrared camera
Solution Approach 1:
The waveguide serves as an intermediary element that bridges the gap between inaccessible measurement locations and the measurement system. By coupling the waveguide to the target component, temperature information from hidden or inaccessible regions can be extracted through the waveguide's distributed discontinuities, eliminating line-of-sight requirements.
3Measurement precision
If thermocouples or infrared thermography are used, then temperature measurement is possible, but physical state modifications cannot be detected
Solution Approach 1:
The waveguide system performs multiple functions simultaneously: it measures temperature through thermal effects on electromagnetic propagation and detects physical state changes through modifications in signal reflection patterns. The same distributed discontinuities that enable temperature profiling also serve as indicators of structural changes, eliminating the need for separate sensor arrays.
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 method enables continuous and precise monitoring of temperature and physical state changes across multiple points, including detection of modifications such as cracks, in high-temperature environments without the limitations of existing technologies.
Implementation Method 1
receiving a signal, or 'reference reflected signal ', reflected by the waveguide in response to said injection
Implementation Method 2
injecting an incident signal via said input end... propagates in the form of an electromagnetic wave
Data Source
AI summary
A device for tracking a target component through electrical time-domain or frequency-domain reflectometry has an electromagnetic waveguide and an interrogator electrically connected to the waveguide in order to inject an incident signal therein and receive a reflected signal in response. The reflected signal has a background echo reflected by the exit end of the waveguide. The waveguide has a measuring part with a plurality of base discontinuities, distributed randomly along the measuring part of the waveguide, and that are able to generate echoes having an amplitude greater than 1% and less than 30% of the amplitude of the background echo.