Rotating Mirror Multiwavelength Pyrometry for Rapid Temperature Profiling
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Solution Overview
Problem
Existing multi-wavelength pyrometry systems are inefficient in measuring high temperatures of rapidly moving or thermally changing components due to the splitting of incoming radiation, resulting in longer acquisition times and reduced accuracy.
Innovation Solution
A thermal measurement system with a plurality of detectors configured to receive radiation within specific wavelength ranges, where a mirror or rotor is used to selectively direct radiation from an object to each detector, allowing for rapid switching and increased data acquisition speed without splitting the radiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If radiation is split by a fixed beam splitter or semi-transparent mirror for transmission onto multiple detectors, then multiple wavelength ranges can be measured simultaneously, but less radiation is collected by each detector resulting in longer acquisition times
Solution Approach 1:
The patent replaces fixed beam splitters with a rotating mirror that dynamically directs radiation from the object to different detectors in sequence. This dynamic switching allows the system to measure multiple wavelength ranges without splitting the radiation, thereby reducing acquisition time while maintaining versatility.
Solution Approach 2:
The rotating mirror performs periodic switching between different detectors, creating a time-multiplexed measurement system. This periodic action allows all detectors to receive the full radiation signal sequentially, eliminating the need to split radiation and reducing the acquisition time for complete temperature profiling.
2Adaptability or versatility
If radiation is split onto multiple detectors, then temperature measurements can be obtained from multiple wavelength ranges, but the accuracy of temperature measurement is reduced due to lower radiation intensity at each detector
Solution Approach 1:
The rotating mirror dynamically directs the full radiation signal to each detector in sequence, ensuring that each detector receives maximum radiation intensity. This dynamic switching mechanism maintains measurement precision across all wavelength ranges while preserving multi-wavelength measurement capability.
3Device complexity
If a fixed beam splitter is used to direct radiation to multiple detectors, then the system structure is simple, but the data acquisition speed is too slow to measure temperature profiles of rapidly moving parts
Solution Approach 1:
The patent introduces a rotating mirror to dynamically switch radiation between detectors, replacing the static beam splitter arrangement. This dynamic system achieves faster data acquisition speeds suitable for rapidly moving parts while maintaining reasonable structural complexity through the use of a single rotating component.
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 faster and more accurate temperature profiling of high-temperature objects by directing all incident radiation to each detector, reducing noise and facilitating rapid data acquisition, suitable for monitoring rapidly moving parts like turbine blades.
Implementation Method 1
an optical and probe subsystem disposed between the object and the mirror to focus the radiation on to the mirror
Implementation Method 2
a mirror configured to selectively direct the radiation from an object to each of the detectors
Implementation Method 3
a plurality of detectors configured to receive radiation within a respective plurality of wavelength ranges
Implementation Method 4
an actuator mechanically coupled to the mirror and configured to rotate the mirror through a plurality of angles
Data Source
AI summary
A thermal measurement system includes a number of detectors configured to receive radiation within respective wavelength ranges. The system also includes a mirror configured to selectively direct the radiation from an object to each of the detectors. The system further includes an actuator mechanically coupled to the mirror and configured to rotate the mirror through a number of angles. The system also includes an optical and probe subsystem disposed between the object and the mirror to focus the radiation on to the mirror.