Flame Temperature Measurement Using Peak Wavelength
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Solution Overview
Problem
Current flame temperature measurement methods, particularly the multi-spectral temperature measurement method, face challenges in achieving high accuracy due to complex calculations and limited spectral information, which restricts the improvement of temperature measurement precision.
Innovation Solution
A method and system that utilize a digital spectrometer to measure the emissive power distribution across various wavelengths, apply energy level structure corrections to transform the Wien's displacement law for ideal black bodies into a generalized form applicable to non-black bodies, allowing for the use of all spectral information for accurate temperature measurement, reducing calculation complexity and enhancing precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the multi-spectral temperature measurement method is used to acquire true temperature through radiance correction, then temperature measurement capability is achieved, but calculation complexity increases and measurement precision is limited
Solution Approach 1:
The patent extracts and utilizes the peak wavelength information from the radiation spectrum, separating this key parameter from the complex multi-spectral data processing. By focusing on the peak wavelength λm where the radiation intensity is maximum, the method avoids the complex radiance correction calculations while directly obtaining temperature information through the simplified relationship T=β/λm
Solution Approach 2:
Instead of using the conventional approach of measuring multiple spectral points and performing radiance correction to infer temperature, the patent inverts the approach by directly measuring the peak wavelength and using it to calculate temperature. This inversion simplifies the measurement process from complex multi-point spectral analysis to a single peak wavelength measurement
2Measurement precision
If only several limited spectral points are used for radiance correction, then measurement system is simplified, but temperature measurement accuracy cannot be further improved
Solution Approach 1:
The patent merges all spectral information into a single comprehensive parameter - the peak wavelength λm. Rather than discarding spectral data or using only limited points, the method combines the entire spectral distribution's characteristic (the peak position) to achieve both full information utilization and measurement simplicity
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 approach significantly improves temperature measurement accuracy by enabling the use of thousands of monochromatic radiation capacities for data processing, achieving high precision with clear theoretical foundations and strong environmental interference resistance, and simplifying the calibration process to a single temperature point.
Implementation Method 1
measuring a first digital distribution spectrum of emissive power, changing with a wavelength λ
Implementation Method 2
According to the black body radiation theory, three kinds of optical temperatures are defined
Implementation Method 3
acquiring a Wien's displacement law correction formula of the to-be-measured object
Data Source
AI summary
The present invention discloses a method for measuring an actual temperature of a flame by using all information of a radiation spectrum and a measurement system thereof. The method includes: conducting more theoretical data processing by using energy level structure correction, wherein all information of the radiation spectrum can be used; and by way of a keyboard input manner or a data transmission input manner, acquiring an energy level structure correction parameter, and finally acquiring a more accurate actual temperature value of a measured flame. The method effectively overcomes a defect that the true temperature of the flame can be obtained by only conducting radiance correction through data processing with great calculations when adpted multi-spectral temperature measurement method. In the existing multi-spectral temperature measurement method at present, only information of several monochromatic radiation capacities in the radiation spectrum can be used; and in the method, information of all the monochromatic radiation capacities, thousands of monochromatic radiation capacities in general, in the radiation spectrum can be used.