Fast Emissivity Measuring Apparatus With Adjustable Focusing and Field Calibration

Zhao, Baolin; Zhang, Kaihua; Yu, Kun; Liu, Yufang

doi:10.1109/tim.2023.3268656

Cited by 2 publications

(1 citation statement)

References 44 publications

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“…The emissivity measurement system was built based on the measurement principle of the energy contrast method, as shown in Figure 1. And it is mainly composed of a sample heating furnace, a standard radiation source, an optical system, and an improved fiber optic spectrometer [35]. The radiation coming from samples or blackbody is converged by a concave mirror, then reflected by a plane mirror, and finally coupled into the optical fiber, and enters the fiber optic spectrometer through a fiber with a diameter of 400 nm.…”

Section: Correction Devicementioning

confidence: 99%

An Improved Method for Accurate Radiation Measurement Based on Dark Output Noise Drift Compensation

Zhao

Zhang

Yang

et al. 2023

Sensors

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This paper verified through experiments that change in ambient temperature are the main cause of dark output noise drift. Additionally, the impact of dark output noise drift in fiber optic spectrometers on emissivity measurements has been investigated in this work. Based on an improved fiber optic spectrometer, two methods were proposed for characterizing and correcting the dark output noise offset in fiber optic spectrometers: the mean correction scheme and the linear fitting correction scheme. Compared to the mean correction scheme, the linear fitting correction scheme is more effective in solving the problem of dark output noise drift. When the wavelength is greater than 1600 nm, the calibration relative error of silicon carbide (SIC) emissivity is less than 0.8% by the mean correction scheme, while the calibration relative error of silicon carbide emissivity is less than 0.62% by the linear fitting correction scheme. This work solves the problem of dark output noise drift in prolonged measurement based on fiber optic spectrometers, improving the accuracy and reliability of emissivity and quantitative radiation measurement.

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Section: Correction Devicementioning

confidence: 99%

An Improved Method for Accurate Radiation Measurement Based on Dark Output Noise Drift Compensation

Zhao

Zhang

Yang

et al. 2023

Sensors

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Approach to multispectral thermometry with Planck formula and hybrid metaheuristic optimization algorithm

Zhao,

Zhang,

et al. 2023

Opt. Express

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Accurate temperature measurement has significant implications for product quality, industrial process control, and scientific research. As a non-contact temperature measurement method with broad application prospects, multispectral thermometry still poses significant challenges in data processing. Currently, most multispectral thermometry methods use the Wien approximation equation to construct the objective function. However, the use of the Wien approximation equation is conditional and generally applicable only to low temperatures or short wavelengths. In this paper, what we believe is a new data processing model of multispectral thermometry is established based on the Planck formula; Additionally, a feasible region constraint method is proposed to constrain the emissivity range; By utilizing a hybrid metaheuristic optimization algorithm based on differential evolution (DE) and multi-population genetic (MPG) algorithms, the simulation results of six different models and experimental results of silicon carbide demonstrate that the proposed algorithm achieves an average relative error in temperature measurement within 0.42% and a random relative error within 0.79%. The average computation time for each temperature inversion is approximately 0.26 seconds. The accuracy and efficiency of the algorithm ensure that it can be applied to real-time temperature measurement in industrial field.

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Fast Emissivity Measuring Apparatus With Adjustable Focusing and Field Calibration

Cited by 2 publications

References 44 publications

An Improved Method for Accurate Radiation Measurement Based on Dark Output Noise Drift Compensation

An Improved Method for Accurate Radiation Measurement Based on Dark Output Noise Drift Compensation

Approach to multispectral thermometry with Planck formula and hybrid metaheuristic optimization algorithm

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