Article
Optics
Yingze Zhao, Jinguang Lv, Kaifeng Zheng, Jin Tao, Yuxin Qin, Weibiao Wang, Chao Wang, Jingqiu Liang
Summary: This paper introduces a narrow-band spectral window moving temperature inversion algorithm to address the issue of inaccurate emissivity presets in multispectral temperature measurements of aero-engine turbine blades. Experimental results demonstrate that the algorithm can achieve high-precision temperature field inversion.
Article
Chemistry, Multidisciplinary
Vid Mlacnik, Igor Pusnik
Summary: This article discusses the limitations of non-contact temperature measurement in practical applications and proposes the methods of grey body radiation thermometry and real body radiation thermometry. The article also introduces the compensation for data loss caused by spectral integration using an inverse model and proposes a method for calculating effective parameters. The uncertainty of radiation thermometry is analyzed, and a newly developed model for traceable measurements using radiation thermometry is presented.
APPLIED SCIENCES-BASEL
(2023)
Article
Optics
C. H. U. N. H. U. Yao, S. H. E. N. G. X. I. A. N. Shi, H. U. A. Fang, T. H. New
Summary: This paper presents a novel chameleon swarm algorithm approach for obtaining temperature information from light-field multi-wavelength data with higher accuracy without prior emissivity knowledge. Experimental tests show that the chameleon swarm algorithm outperforms traditional internal penalty function and generalized inverse matrix -exterior penalty function algorithms in terms of measurement accuracy and computational efficiency.
Article
Optics
Zhuangtao Tian, Kaihua Zhang, Yanfen Xu, Kun Yu, Yufang Liu
Summary: In this article, a novel data processing model for multispectral thermometry is established by adding new constraints of emissivity. Two algorithms, Sequential Randomized Coordinate Shrinking (SRCS) and Multiple-Population Genetic (MPG), are introduced for model optimizing. The experiments show that the proposed method can simultaneously estimate temperature and emissivity with high accuracy and real-time measurement capability.
Article
Chemistry, Analytical
Javier de Lucas
Summary: An experimental procedure for characterizing the size-of-source effect is proposed in this paper, which is an important factor causing uncertainty in the measurement of direct reading radiation thermometers. The procedure and uncertainty calculation described in the paper are aligned with the requirements of metrological traceability in industry and science. The results of applying and validating this procedure in the calibration laboratories of radiation thermometry in the industrial field are presented.
Article
Nanoscience & Nanotechnology
Zhi Xie, Junlin Wang, Xunjian Che
Summary: This paper proposes a method to eliminate emissivity and temperature differences in in situ measurements. By using a vacuum blackbody and a gold-plated reflector, the emissivity of the measured sample remains constant and the temperature differences are eliminated, thereby improving the traceability and accuracy of the measurements.
Article
Engineering, Multidisciplinary
Yucun Zhang, Zhou Zou, Fang Yan
Summary: Multispectral radiation thermometry is a widely used infrared temperature measurement technology. This study proposes a data processing algorithm based on a multi-segment linear model and secondary inversion, which accurately calculates temperature and emissivity.
Article
Optics
Shu Zheng, Xinyu Li, Weiguang Cai, Jian Zhang, Zirui Liu, Bo Zhou, Qiang Lu
Summary: This study experimentally investigated the temperature and emissivity of rose and tea soybean candle flames at different heights through spectral thermometry, with the polynomial approximation emissivity model showing the best performance. The results also showed differences in radiative properties and alkali metal content between the two candle flames.
Article
Instruments & Instrumentation
Yanxiu Wei, Bojun Sun, Xiaogang Sun, Kaixin Xue
Summary: This paper proposes a one-point reflection correction method based on the relationship between band emissivity and blackbody radiance. This method does not require knowledge of the target's emissivity, but only needs a full-range calibration at one ambient temperature to accurately measure the target temperature under different ambient temperatures, with high measurement accuracy.
INFRARED PHYSICS & TECHNOLOGY
(2022)
Article
Multidisciplinary Sciences
Jun Liu, Yan-hui Huang, Ying Ci, Jiang-xiong Fang, Feng Yang, Nobes David
Summary: This article proposes a method for correcting measurement errors caused by emissivity uncertainty in the temperature measurement of the ladle inner wall, and experimental results show that the method achieves high measurement accuracy, which is of great significance for the control of metallurgical processes based on temperature information.
SCIENTIFIC REPORTS
(2022)
Article
Instruments & Instrumentation
Javier de Lucas, Jose J. Segovia
Summary: Large-area blackbody cylinder conical cavities are widely used for calibrating and characterizing radiation thermometers and thermal imagers in the infrared. The radiated temperature depends on effective emissivity and contact temperature. The uniformity of the emitted radiation is influenced by the cone angle and temperature gradient along the cavity. The optimization of blackbody depends on geometric parameters and temperature.
INFRARED PHYSICS & TECHNOLOGY
(2023)
Article
Green & Sustainable Science & Technology
Dongping Shi, Jinmiao Wang, Lichun Xiong
Summary: In this paper, a multi-band pseudo-emissivity denoising algorithm is proposed to effectively denoise infrared images in the process of uniaxial loading of rocks, and the characteristics of infrared radiation in the process of uniaxial compression loading and fracturing of real rocks are analyzed using indicators.
Review
Optics
Jiao Bai, Xinghui Li, Xiaohao Wang, Jianjian Wang, Kai Ni, Qian Zhou
Summary: Dispersion is a common phenomenon in broadband optical systems that affects displacement measurements on sample surfaces. A novel strategy using self-reference spectrum corrects the dispersion from unstable light sources or alterable sample surfaces, making the focus-wavelength unaffected. Robustness tests demonstrate that the self-reference dispersion correction significantly improves measurement accuracy against different light sources and sample surfaces.
OPTICS AND LASERS IN ENGINEERING
(2021)
Article
Engineering, Electrical & Electronic
Jian Zhu, Bo-Tao Wang, Tao Liang, Yu Yang, Chang Sun, Ming Ding
Summary: In this article, a high-precision correction method for temperature measurement errors caused by reflected radiation under high-temperature background is presented. The correction theory for temperature measurement errors caused by reflected radiation is derived, and a physical field model for temperature measurement in a high-temperature furnace is established. Simulation analysis and calibration experiments are conducted to analyze the temperature measurement errors before and after the correction of reflected radiation. The experimental results demonstrate a significant decrease in the temperature measurement errors caused by reflected radiation.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Engineering, Multidisciplinary
Shu Zheng, Weiguang Cai, Chen Zhao, Dengke Li, Jian Zhang, Qiang Lu
Summary: A multi-wavelength radiation thermometry method using multispectral imaging technology was proposed to measure flame temperature and emissivity, considering the low spatial resolution of spectrometer and low spectral resolution of CCD. The experimental results showed that the maximum temperature of the thin-wick paraffin flame was 1943 K, and the emissivity of the thin-wick paraffin flame was lower than that of the thick-wick flame at any position, but the emissivity of the biomass candle flame near the flame center was the highest. The measured temperature distribution was validated by a spectrometer system with a relative error of 2.66%.
Article
Engineering, Multidisciplinary
Sicheng Jiao, Shixiang Wang, Minge Gao, Min Xu
Summary: This paper presents a non-contact method of thickness measurement for thin-walled rotary shell parts based on a chromatic confocal sensor. The method involves using a flip method to obtain surface profiles from both sides of the workpiece, measuring the decentration and tilt errors of the workpiece using a centering system, establishing a unified reference coordinate system, reconstructing the external and internal surface profiles, and calculating the thickness. Experimental results show that the method can accurately measure the thickness of a sapphire spherical shell workpiece and is consistent with measurements of other materials.
Article
Engineering, Multidisciplinary
Rajeev Kumar, Sajal Agarwal, Sarika Pal, Alka Verma, Yogendra Kumar Prajapati
Summary: This study evaluated the performance of a CaF2-Ag-MXene-based surface plasmon resonance (SPR) sensor at different wavelengths. The results showed that the sensor achieved the maximum sensitivity at a wavelength of 532 nm, and higher sensitivities were obtained at shorter wavelengths at the expense of detection accuracy.
Article
Engineering, Multidisciplinary
Attilio Di Nisio, Gregorio Andria, Francesco Adamo, Daniel Lotano, Filippo Attivissimo
Summary: Capacitive sensing is a widely used technique for a variety of applications, including avionics. However, current industry standard Capacitive Level Sensors (CLSs) used in helicopters perform poorly in terms of sensitivity and dynamic characteristics. In this study, novel geometries were explored and three prototypes were built and tested. Experimental validation showed that the new design featuring a helicoidal slit along the external electrode of the cylindrical probe improved sensitivity, response time, and linearity.
Article
Engineering, Multidisciplinary
Kai Yang, Huiqin Wang, Ke Wang, Fengchen Chen
Summary: This paper proposes an effective measurement method for dynamic compaction construction based on time series model, which enables real-time monitoring and measurement of anomalies and important construction parameters through simulating motion state transformation and running time estimation.
Article
Engineering, Multidisciplinary
Hui Fu, Qinghua Song, Jixiang Gong, Liping Jiang, Zhanqiang Liu, Qiang Luan, Hongsheng Wang
Summary: An automatic detection and pixel-level quantification model based on joint Mask R-CNN and TransUNet is developed to accurately evaluate microcrack damage on the grinding surfaces of engineering ceramics. The model is effectively trained on actual micrograph image dataset using a joint training strategy. The proposed model achieves reliable automatic detection and fine segmentation of microcracks, and a skeleton-based quantification model is also proposed to provide comprehensive and precise measurements of microcrack size.
Review
Engineering, Multidisciplinary
Sang Yeob Kim, Da Yun Kwon, Arum Jang, Young K. Ju, Jong-Sub Lee, Seungkwan Hong
Summary: This paper reviews the categorization and applications of UAV sensors in forensic engineering, with a focus on geotechnical, structural, and water infrastructure fields. It discusses the advantages and disadvantages of sensors with different wavelengths and addresses the challenges of current UAV technology and recommendations for further research in forensic engineering.
Article
Engineering, Multidisciplinary
Anton Nunez-Seoane, Joaquin Martinez-Sanchez, Erik Rua, Pedro Arias
Summary: This article compares the use of Mobile Laser Scanners (MLS) and Aerial Laser Scanners (ALS) for digitizing the road environment and detecting road slopes. The study found that ALS data and its corresponding algorithm achieved better detection and delimitation results compared to MLS. Measuring the road from a terrestrial perspective negatively impacted the detection process, while an aerial perspective allowed for scanning of the entire slope structure.
Article
Engineering, Multidisciplinary
Nur Luqman Saleh, Aduwati Sali, Raja Syamsul Azmir Raja Abdullah, Sharifah M. Syed Ahmad, Jiun Terng Liew, Fazirulhisyam Hashim, Fairuz Abdullah, Nur Emileen Abdul Rashid
Summary: This study introduces an enhanced signal processing scheme for detecting mouth-click signals used by blind individuals. By utilizing additional band-pass filtering and other steps, the detection accuracy is improved. Experimental results using artificial signal data showed a 100% success rate in detecting obstacles. The emerging concepts in this research are expected to benefit radar and sonar system applications.
Article
Engineering, Multidisciplinary
Jiqiang Tang, Shengjie Qiu, Lu Zhang, Jinji Sun, Xinxiu Zhou
Summary: This paper studies the magnetic noise level of a compact high-performance magnetically shielded room (MSR) under different operational conditions and establishes a quantitative model for magnetic noise calculation. Verification experiments show the effectiveness of the proposed method.
Review
Engineering, Multidisciplinary
Krzysztof Bartnik, Marcin Koba, Mateusz Smietana
Summary: The demand for miniaturized sensors in the biomedical industry is increasing, and optical fiber sensors (OFSs) are gaining popularity due to their small size, flexibility, and biocompatibility. This study reviews various OFS designs tested in vivo and identifies future perspectives and challenges for OFS technology development from a user perspective.
Article
Engineering, Multidisciplinary
Yue Wang, Lei Zhou, Zihao Li, Jun Wang, Xuangou Wu, Xiangjun Wang, Lei Hu
Summary: This paper presents a 3-D reconstruction method for dynamic stereo vision of metal surface based on line structured light, overcoming the limitation of the measurement range of static stereo vision. The proposed method uses joint calibration and global optimization to accurately reconstruct the 3-D coordinates of the line structured light fringe, improving the reconstruction accuracy.
Article
Engineering, Multidisciplinary
Jaafar Alsalaet
Summary: Order tracking analysis is an effective tool for machinery fault diagnosis and operational modal analysis. This study presents a new formulation for the data equation of the second-generation Vold-Kalman filter, using separated cosine and sine kernels to minimize error and provide smoother envelopes. The proposed method achieves high accuracy even with small weighting factors.
Article
Engineering, Multidisciplinary
Tonglei Cao, Kechen Song, Likun Xu, Hu Feng, Yunhui Yan, Jingbo Guo
Summary: This study constructs a high-resolution dataset for surface defects in ceramic tiles and addresses the scale and quantity differences in defect distribution. An improved approach is proposed by introducing a content-aware feature recombination method and a dynamic attention mechanism. Experimental results demonstrate the superior accuracy and efficiency of the proposed method.
Article
Engineering, Multidisciplinary
Qinghong Fu, Yunxi Lou, Jianghui Deng, Xin Qiu, Xianhua Chen
Summary: Measurement and quantitative characterization of aging-induced gradient properties is crucial for accurate analysis and design of asphalt pavement. This research proposes the composite specimen method to obtain asphalt binders at different depths within the mixture and uses dynamic shear rheometer tests to measure aging-induced gradient properties and reveal internal mechanisms. G* master curves are constructed to investigate gradient aging effects in a wide range. The study finds that the composite specimen method can effectively restore the boundary conditions and that it is feasible to study gradient aging characteristics within the asphalt mixture. The study also observes variations in G* and delta values and the depth range of gradient aging effects for different aging levels.
Article
Engineering, Multidisciplinary
Min Li, Kai Wei, Tianhe Xu, Yali Shi, Dixing Wang
Summary: Due to the limitations of ground monitoring stations in China for the BDS, the accuracy of BDS Medium Earth Orbit (MEO) satellite orbits can be influenced. To overcome this, low Earth orbit (LEO) satellites can be used as additional monitoring stations. In this study, data from two LEO satellites were collected to improve the precise orbit determination of the BDS. By comparing the results with GPS and BDS-2/3 solutions, it was found that including the LEO satellites significantly improved the accuracy of GPS and BDS-2/3 orbits.