Calibration method for attenuator piece used in calibrating a transmittance visibility meter

Jing, Liang; Zhang, Guoyu; Zhang, Jian; Xu, Ding; Sun, Gaofei

doi:10.1049/joe.2018.9067

Cited by 2 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although this approach reduces the number and types of LEDs required, ensuring long-term spectral simulation accuracy proves challenging due to factors such as temperature fluctuations, variations in the spectral radiation of the halogen tungsten lamp and LEDs, and radiation output drift caused by the aging of lamp and LEDs over time [9]. Jing [11] proposed a spectral simulation method based on the least square method and the redundant equipartition mechanism owing to advancements in space light modulator components. This method employed DMD to achieve color temperature simulation of 2700 K stars within the spectrum range of 500 nm-900 nm, yielding a spectral simulation error of better than ±5.7% [11].…”

Section: Introductionmentioning

confidence: 99%

“…Jing [11] proposed a spectral simulation method based on the least square method and the redundant equipartition mechanism owing to advancements in space light modulator components. This method employed DMD to achieve color temperature simulation of 2700 K stars within the spectrum range of 500 nm-900 nm, yielding a spectral simulation error of better than ±5.7% [11]. Although this method demonstrates high simulation accuracy, its simulation of color temperature remains simple.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Multi-Color Temperature and Magnitude Simulation for Astronomical Spectral Velocity Measurement

Liu,

Zhang,

Zhang

et al. 2023

IEEE Access

View full text Add to dashboard Cite

The simulation of terrestrial stellar radiation information suffers from distortions due to limited precision of stellar spectrum and magnitude simulations. Hence, the effective verification and evaluation of experimental conditions for new techniques such as astronomical spectral velocity measurement and navigation are hindered. This study proposes a multi-color temperature and multimagnitude simulation approach for astronomical spectral velocity measurement and navigation. First, we analyzed the composition and operational principles of the multi-color temperature and multi-magnitude simulation system. Furthermore, we established a mathematical modulation model for multi-color temperature and multi-magnitude simulation. Second, we designed a fuzzy proportional-integral-derivative (PID) controller with dual input and three outputs, as well as a multi-magnitude feedback control simulation algorithm based on the principles of spectral modulation and illuminance conversion. Finally, we constructed an experimental platform to validate the accuracy of spectral simulation and proposed a method to extend the simulation range for multi-magnitude simulation measurements based on existing experimental conditions. Moreover, we simulated 0-8 stars in the color temperature spectrum ranging from 3000 K to 11000 K. Experimental results demonstrated that the maximum spectral simulation error for color temperature between 3000 K and 11000 K color temperature was within ±4.996%, while the maximum simulation error for magnitude 0-8 stars was within ±0.1 Mv. The proposed method enables simultaneous simulation of multi-color temperature and multi-magnitude, enhancing the accuracy of spectral and magnitude simulations. Additionally, it resolved the issue of a limited magnitude simulation range caused by detection limits, providing effective verification and evaluation of experimental conditions for the functionality and performance of the new autonomous navigation method for astronomical spectral velocity measurement.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%