| Citation: | LI Yun-long, LI Zhou, SUN Zhi-yuan, YANG Guo-qing. A simplified method for high temperature calibration in the visible light band[J]. Chinese Optics, 2024, 17(3): 580-585. doi: 10.37188/CO.2023-0122
|
To improve the efficiency of high temperature calibration in the visible light band (0.3 μm~0.9 μm), a simplified method for high-temperature calibration is proposed. Firstly, a high-temperature calibration model in the visible light band with exposure time variable is proposed. Based on a large number of experimental data, it is found that the gray value of each channel of an RGB camera varies linearly not only with the increase of exposure time, but also with the increase of black-body radiation brightness. Thus, a specific form of high-temperature calibration model in the visible light band is determined. To solve the unknowns in the simplified high-temperature calibration model in the visible light band, image data at two different exposure times are collected under two levels of black-body radiation brightness, and then the image data is processed to obtain the high-temperature calibration curve of the RGB camera under any exposure time. Finally, the simplified visible light band high-temperature calibration method proposed in this article is compared to the conventional visible light band high-temperature calibration method based on exposure time. The experimental results show that the maximum relative error between the calculated value of the R channel, G channel, B channel and the calibrated values are 3.38%, 2.56%, −1.14%. Moreover, the relative error between the calculated and the calibrated values for each channel does not exceed 3.50%. The mathematical model proposed in this article can effectively simplify the conventional high-temperature calibration method, resulting in a reduced high-temperature calibration time and improving the calibration efficiency.
| [1] |
XIE CH Y, SONG J, LIU Y, et al. Design and research on calibration method of multi-channel self-calibration infrared radiation thermometer[J]. Proceedings of SPIE, 2021, 12061: 120611M.
|
| [2] |
HU H, SONG P, FENG H, et al. Surface temperatμre of blast fireball measured by colorimetric thermometer[C]. Proceedings of the International Conference on Mechatronic System and Measurement Technology, 2012.
|
| [3] |
李进军. 彩色CCD比色测温的灰度值融合处理方法研究[J]. 计算机测量与控制,2012,20(1):177-179. doi: 10.16526/j.cnki.11-4762/tp.2012.01.038
LI J J. An intensity fusion method applied to color CCD-based colorimetric temperature measurement[J]. Computer Measurement & Control, 2012, 20(1): 177-179. (in Chinese). doi: 10.16526/j.cnki.11-4762/tp.2012.01.038
|
| [4] |
YAN J H, LI W T. Error correction research of colorimetric temperature-measurement based on CCD[C]. Proceedings of the 31st Chinese Control Conference, IEEE, 2012: 5649-5652.
|
| [5] |
YAN R, ZHOU X M, LI F. Survey of dual waveband colorimetric temperature measurement technology[C]. Proceedings of the 26th Chinese Control and Decision Conference, IEEE, 2014: 5177-5181.
|
| [6] |
张晓龙, 刘英, 孙强. 高精度非致冷长波红外热像仪的辐射标定[J]. 中国光学,2012,5(3):235-241.
ZHANG X L, LIU Y, SUN Q. Radiometric calibration of uncooled long-wave infrared thermal imager with high-precision[J]. Chinese Optics, 2012, 5(3): 235-241. (in Chinese).
|
| [7] |
黄洁, 张轲, 朱晓鹏, 等. 基于RGB数字滤光的CCD激光熔覆测温系统的标定[J]. 光电子·激光,2013,24(5):967-974. doi: 10.16136/j.joel.2013.05.008
HUANG J, ZHANG K, ZHU X P, et al. Calibration of CCD temperature measurement system based on RGB digital filtering in laser cladding[J]. Journal of Optoelectronics·Laser, 2013, 24(5): 967-974. (in Chinese). doi: 10.16136/j.joel.2013.05.008
|
| [8] |
毛尹航, 于天河. 高速CCD像机的测温系统标定方法[J]. 哈尔滨理工大学学报,2016,21(1):72-76. doi: 10.15938/j.jhust.2016.01.015
MAO Y H, YU T H. Calibration method to measure the temperature system based on the high-speed CCD camera[J]. Journal of Harbin University of Science and Technology, 2016, 21(1): 72-76. (in Chinese). doi: 10.15938/j.jhust.2016.01.015
|
| [9] |
马岩, 张帅, 刘元, 等. 基于天基定量实测数据的月球长波红外辐射特性研究[J]. 中国光学,2022,15(3):525-533. doi: 10.37188/CO.2021-0202
MA Y, ZHANG SH, LIU Y, et al. Lunar long-wave infrared radiation characteristics based on space-based quantitative measured data[J]. Chinese Optics, 2022, 15(3): 525-533. (in Chinese). doi: 10.37188/CO.2021-0202
|
| [10] |
孙志远, 常松涛, 朱玮. 中波红外探测器辐射定标的简化方法[J]. 红外与激光工程,2014,43(7):2132-2137. doi: 10.3969/j.issn.1007-2276.2014.07.017
SUN ZH Y, CHANG S T, ZHU W. Simplifying method of radiance calibration for MWIR detector[J]. Infrared and Laser Engineering, 2014, 43(7): 2132-2137. (in Chinese). doi: 10.3969/j.issn.1007-2276.2014.07.017
|
| [11] |
罗茂捷, 周金梅, 傅景能, 等. 考虑积分时间变量的红外系统辐射响应定标[J]. 红外与激光工程,2013,42(1):36-40. doi: 10.3969/j.issn.1007-2276.2013.01.007
LUO M J, ZHOU J M, FU J N, et al. Integration time as variable for radiometric calibration of infrared system[J]. Infrared and Laser Engineering, 2013, 42(1): 36-40. (in Chinese). doi: 10.3969/j.issn.1007-2276.2013.01.007
|
| [12] |
梁美, 孙博君, 孙晓刚, 等. 多光谱高温计有效波长标定方法研究[J]. 光谱学与光谱分析,2017,37(8):2352-2355.
LIANG M, SUN B J, SUN X G, et al. Study on effective wavelength calibration method of multispectral pyrometer[J]. Spectroscopy and Spectral Analysis, 2017, 37(8): 2352-2355. (in Chinese).
|
Figures(3) / Tables(3)
DownLoad:
