Optical Fiber Overheat Testing Apparatus with Bragg Gratings
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Solution Overview
Problem
Existing optical fiber aircraft temperature detection systems require effective testing methods to validate proper operation and detect overheating, which is challenging due to the complexity of simulating operational conditions without disrupting aircraft systems.
Innovation Solution
A system utilizing fiber Bragg gratings with a testing apparatus that mimics the optical fiber instrument loop, including multiple Bragg gratings with distinct wavelength spectra, allows for offline or in-operation testing by applying heat and strain to simulate temperature changes, enabling accurate controller response validation without deconstructing the aircraft.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional testing methods are used to validate optical fiber temperature detection systems, then system reliability can be assessed, but the testing process requires aircraft disassembly and disruption of operational systems
Solution Approach 1:
The patent creates a simplified test loop that replicates the essential characteristics of the aircraft's optical fiber temperature detection system. This test loop includes a test optical fiber with fiber Bragg gratings that mimic the wavelength spectrum changes of the actual system, allowing validation of controller responses without needing to access or disassemble the aircraft's operational systems.
Solution Approach 2:
The testing system is segmented into independent components: a separate test loop with its own optical fiber and Bragg gratings, independent heating elements for temperature control, and a controller that can be validated in isolation. This segmentation allows the test loop to be set up and operated independently from the aircraft system, eliminating the need for disassembly.
2Measurement precision
If comprehensive temperature detection testing is performed on aircraft systems, then overheating detection accuracy is improved, but the complexity of the testing apparatus increases
Solution Approach 1:
The patent uses fiber Bragg gratings with specific wavelength spectra that change in response to temperature variations. By monitoring these wavelength shifts, the system achieves precise temperature detection. The test loop incorporates heating elements that can precisely control and vary temperature parameters, allowing validation of the controller's ability to detect and respond to temperature changes without requiring complex testing equipment.
3Adaptability or versatility
If offline testing of optical fiber temperature detection systems is enabled, then testing flexibility is improved, but additional testing equipment and infrastructure are required
Solution Approach 1:
The test loop is designed as a universal testing platform that can validate both offline and in-operation conditions. The same basic infrastructure - the optical fiber with Bragg gratings and the controller - can be used for different testing scenarios. The test loop can be configured to simulate various operational conditions, making the testing apparatus versatile enough to handle multiple testing requirements without needing separate specialized equipment for each test type.
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 solution enables precise detection and validation of temperature changes and overheating in optical fibers, ensuring proper system operation and reducing the need for aircraft disassembly, thereby improving testing efficiency and reliability.
Implementation Method 1
The first fiber Bragg grating has a first wavelength spectrum that is based on a first temperature detection apparatus
Implementation Method 2
The second fiber Bragg grating is disposed between the first fiber Bragg grating and a third fiber Bragg grating
Data Source
Figure 1
Figure 2A~2B
Figure 3A
AI summary
Disclosed is an optical fiber overheat detection testing apparatus. The apparatus includes an optical fiber having a first end and a second end, the optical fiber having a predetermined length associated with a predetermined attenuation based on an overheat detection instrument loop. The apparatus includes a first fiber Bragg grating disposed on the optical fiber having a first wavelength spectrum based on a first temperature detection apparatus. The apparatus includes a second fiber Bragg grating disposed on the optical fiber having a second wavelength spectrum based on at least one of a plurality of overheat detection apparatuses.