Trichroic Prism Temperature Measurement Through Water Mist and Dust
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Solution Overview
Problem
Conventional temperature measurement techniques in high-temperature industrial environments, such as steel rolling and non-ferrous metal smelting, face challenges due to high-temperature radiation, water mist disturbance, and dust coverage, leading to inaccurate and unstable temperature measurements.
Innovation Solution
A water-mist-penetrating three-wavelength temperature measurement device using a trichroic prism and radiation detection assemblies to separate and convert radiation signals at different wavelengths, combined with a computing unit for accurate temperature determination, and a method involving data fusion and model adaptation to handle environmental disturbances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single-wavelength infrared temperature measurement technique is used, then the structure is simple, but the measurement accuracy deteriorates due to emissivity fluctuation and environmental interference
Solution Approach 1:
The patent divides the infrared radiation detection into three separate wavelength bands (first, second, and third wavelength bands) using three independent radiation detection assemblies. Each assembly detects radiation at a specific wavelength, allowing the system to separately analyze the effects of emissivity variations and environmental interference at different wavelengths, thereby improving measurement accuracy while maintaining manageable structural complexity through modular design
2Adaptability or versatility
If a dual-wavelength ratio temperature measurement technique is used, then emissivity dependence is partially solved, but measurement accuracy deteriorates due to non-uniform signal attenuation in complex environments
Solution Approach 1:
The patent applies different wavelength bands (first, second, and third wavelength bands) that have different penetration characteristics and detection characteristics for water mist, dust, and oxide scales. By selecting specific wavelength bands with different attenuation properties, the system can locally optimize detection through different media conditions, allowing the measurement system to adapt to varying environmental interference patterns and maintain accuracy in complex industrial environments
3Adaptability or versatility
If a three-wavelength temperature measurement technique is used, then environmental adaptability is improved, but system complexity increases due to additional detection assemblies and calculation algorithms
Solution Approach 1:
The patent combines three radiation detection assemblies (each detecting a different wavelength band) into a single integrated temperature measurement system. The detection assemblies share common components such as the optical aperture, housing, and data processing unit. This merging approach allows the system to achieve enhanced environmental adaptability through multi-wavelength detection while controlling overall system complexity by sharing common structural and computational resources
4Measurement precision
If environmental parameters are acquired and complex calculation algorithms are introduced to achieve high measurement accuracy, then temperature measurement accuracy is improved, but productivity deteriorates due to reduced real-time measurement efficiency
Solution Approach 1:
The patent performs preliminary separation of the infrared radiation signal into three distinct wavelength bands using the radiation detection assemblies before any complex calculation is performed. This preliminary spectral decomposition allows the system to pre-process the raw radiation data, organizing it into structured wavelength-specific signals that can be more efficiently processed by the data processing unit, thereby reducing the computational burden during real-time temperature calculation and maintaining high measurement accuracy without sacrificing productivity
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
The device significantly reduces measurement errors caused by water mist and dust, ensuring high accuracy and adaptability in dynamic high-temperature scenarios, enabling real-time, precise temperature measurement across various industrial applications.
Implementation Method 1
a trichroic prism... configured to be able to receive the light signals entering via the optical aperture through the incident face, and emit radiation signals having different wavelength bands through the first emission face, the second emission face, and the third emission face, respectively
Implementation Method 2
the first radiation detection assembly configured to be able to receive a first radiation signal having a first wavelength band emitted from the first emission face, and convert the first radiation signal into a first electrical signal
Implementation Method 3
an optical aperture, the aperture configured to be able to permit passage of light signals emitted from a target to be measured
Data Source
AI summary
A water-mist-penetrating three-wavelength temperature measurement device and method for a high-temperature environment, the device including a housing, a three-waveband beam splitting detection module and a computing unit, the housing provided with an optical aperture, the three-waveband beam splitting detection module arranged in the housing, and including a trichroic prism, three radiation detection assemblies, the trichroic prism able to receive the light signals entering via the optical aperture, and emit radiation signals having different wavelength bands through three emission faces, respectively; the three radiation detection assemblies able to receive radiation signals having different wavelength bands emitted from corresponding emission faces, and convert them into electrical signals, respectively; the computing unit able to receive the electrical signals, and perform calculation and analysis to determine a temperature value of a target to be measured; the method including: temperature measurement data acquisition, data fusion, parameter tuning, and model application.