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14th International Conference on Power and Energy Systems, ICPES 2024

作者： Jiang, Zhuofeng Chen, Tianxiang Cai, LeHui Gu, Hong Chengdu University of Technology College of Nuclear Technology and Automation Engineering ChengDu China

ISBN: (纸本)9798350391329

As an important equipment in substations, 110kV current transformers play a role in measurement, control, and protection. Insulation defects are prone to occur during operation, and preventive tests should be conducted regularly on current transformers. By measuring the tan δ of 110kV current transformers under different temperature and humidity conditions, the existing temperature and humidity conversion comes from the former Soviet Union. Due to changes in equipment materials, structures, etc., the original conversion factor may not be applicable now. The experiment studied the problem of the influence of temperature and humidity on the current transformer tanδ due to the lack of on-site measurement. The experimental results were statistically analyzed using data analysis software such as Matlab, and a method for correcting the influence of temperature and humidity on the measurement results was obtained through Gauss Newton iteration. This provides a reference for on-site judgment of the insulation condition of current transformers. © 2024 IEEE.

关键词： MATLAB

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Development of Thick Film Integrated Circuit for Nuclear Radiation Measurement

Development of Thick Film Integrated Circuit for Nuclear Rad...

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2024 Academic Conference of China Instrument and Control Society, ACCIS 2024

作者： Ren, Xi Hu, Chuanhao Zeng, Guoqiang Zhao, Honglin Li, Haotian Yue, Tao The college of Nuclear Technology and Automation Engineering Chengdu University of Technology Chengdu China

ISBN: (纸本)9798350350326

Most existing nuclear radiation measurement circuits are implemented based on PCB board-level technology, which has low integration, significant signal loss, and is susceptible to environmental interference, thus preventing the achievement of high-precision measurements in complex radiation fields. Consequently, this paper presents research on thick-film integrated circuits for nuclear radiation measurement. Resistors, capacitors, wires, and the interconnections of devices, are fabricated on an Al2O3 ceramic substrate through a combination of film-forming and surfacemount technologies. A thick-film integrated circuit has been developed for the pre-amplification, filtering, and peak holding of nuclear radiation detectors. This circuit offers advantages such as high integration, minimal parasitic effects, radiation resistance, and robust anti-interference capabilities. An energy spectrum measurement system has been constructed, utilizing the dedicated thick-film integrated circuit developed in this paper, achieving an energy resolution of 6.2% at 662 keV for the 3-inch NaI(Tl) detector, and 3.0% at 662 keV for the 3-inch LaBr3(Ce) detector, and 4.5% at 59.5 keV for the 5mm×5mm quasi-hemispherical CZT detector. The energy spectrum measurement results indicate that the thick-film integrated circuit exhibits exceptional performance and possesses significant application potential within the domain of nuclear radiation detection. © 2024 IEEE.

关键词： Thick films

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Effect of contact materials on the transient characteristics of vacuum arc plasma and anode erosion

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Plasma Science and technology 2024年第11期26卷 170-180页

作者： Ze YANG Dongsheng CAI Qi HUANG Lijun WANG College of Nuclear Technology and Automation Engineering Chengdu University of TechnologyChengdu 610059People’s Republic of China Postdoctoral Mobile Station in Nuclear Science and Technology Chengdu University of TechnologyChengdu 610059People’s Republic of China School of Information Engineering Southwest University of Science and TechnologyMianyang 621010People’s Republic of China State Key Laboratory of Electrical Insulation and Power Equipment Xi’an Jiaotong UniversityXi’an 710049People’s Republic of China

In this study, the mechanisms of the anode phenomena and anode erosion with various contact materials were investigated. Arc parameters were calculated, and the anode temperature was predicted with a transient self-consistent model. The simulation results predicted a constricted arc column and obvious anode phenomena in Cu–Cr alloy contacts than in W–Cu alloy *** observation could be the reason for the concentrated anode erosion in Cu–Cr alloys. For the contacts made by pure tungsten(W) and W–Cu alloy, the anode temperature increased rapidly because of the low specific heat of W. However, the maximum energy flux from the arc column to the anode surface was lower than in other cases. The simulation results were compared with experimental results.

关键词： vacuum arc MHD model anode erosion contact materials

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Analysis of the Characteristics of 110 Kv Cable Partial Discharge High-Frequency Current Signal 14

Analysis of the Characteristics of 110 Kv Cable Partial Disc...

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14th International Conference on Power and Energy Systems, ICPES 2024

作者： Cai, Lehui Chen, Tianxiang Jiang, Zhuofeng Gu, Hong College of Nuclear Technology and Automation Engineering Chengdu University of Technology Chengdu China

ISBN: (纸本)9798350391329

As an important part of power transmission, the safe operation of high-voltage cables is crucial. Partial discharge of 110 kV cable during operation is one of the main causes of cable failure, and it is of far-reaching theoretical significance and practical application value to monitor and analyze the signal generated by partial discharge. The purpose of this study is to explore the relationship between partial discharge and highfrequency current signal of 110 kV cable, and to identify whether partial discharge occurs by analyzing the characteristics of highfrequency current signal. © 2024 IEEE.

关键词： Signal analysis

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A Review on Intelligent Detection and Classification of Power Quality Disturbances:Trends,Methodologies,and Prospects

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Computer Modeling in engineering & Sciences 2023年第11期137卷 1345-1379页

作者： Yanjun Yan Kai Chen Hang Geng Wenqian Fan Xinrui Zhou School of Automation Engineering University of Electronic Science and Technology of ChinaChengdu611731China

With increasing global concerns about clean energy in smart grids,the detection of power quality disturbances(PQDs)caused by energy instability is becoming more and more *** is well acknowledged that the PQD effects on power grid equipment are destructive and hazardous,which causes irreversible damage to underlying electrical/electronic equipment of the concerned intelligent *** order to ensure safe and reliable equipment implementation,appropriate PQDdetection technologiesmust be adopted to avoid such adverse *** paper summarizes the newly proposed and traditional PQD detection techniques in order to give a quick start to new researchers in the related field,where specific scenarios and events for which each technique is applicable are also clearly ***,comments on the future evolution of PQD detection techniques are *** the published review articles,this paper focuses on the new techniques from the last five years while providing a brief recap on traditional PQD detection techniques so as to supply researchers with a systematic and state-of-the-art review for PQD detection.

关键词： Power quality disturbance renewable energy feature extraction and optimization intelligent classification signal processing smart grids

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Enhancing traffic light recognition in autonomous vehicles: A novel convolutional neural network approach for fog removal using efficient channel attention 4

Enhancing traffic light recognition in autonomous vehicles: ...

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4th International Conference on Computer Vision, Application, and Algorithm, CVAA 2024

作者： Ji, Shuai Zhang, Huangnian Dong, Xingwen The College of Nuclear Technology and Automation Engineering Chengdu University of Technology Sichuan Chengdu610059 China

ISBN: (数字)9781510687622

ISBN: (纸本)9781510687615

Adverse environmental conditions such as haze, rain, and dust can significantly impair visibility for vehicles in motion, leading to blurred vision. Traditional de-fogging techniques often encounter limitations, including reliance on pre-existing assumptions, color distortion, and inadequate real-time performance. Consequently, these methods may fail to effectively distinguish traffic light images post-de-fogging, thereby hindering target recognition in autonomous driving systems. This study introduces a convolutional neural network that integrates deep and shallow feature fusion utilizing the Efficient Channel Attention mechanism. By employing an atmospheric scattering model, shallow features from fogged images are extracted through convolutional layer operations, while deep features are obtained using parallel multi-scale convolution kernels. The integration of shallow and deep features is achieved through a series of fusion steps, enhanced by the application of an effective channel attention mechanism. Ultimately, a transmittance map corresponding to the fog map is derived through nonlinear regression, facilitating the recovery of fog-free images and improving the recognition capabilities of the YOLOv8 model. Experimental results demonstrate that this approach effectively identifies traffic light targets during simulations of vehicles navigating traffic intersections. Furthermore, the quality of fog removal achieved by this method surpasses that of other algorithms, as evidenced by both subjective evaluations and objective analyses. © 2025 SPIE.

关键词： Convolutional neural networks

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Nanodiamond/Ti_(3)C_(2) MXene-coated quartz crystal microbalance humidity sensor with high sensitivity and high quality factor

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Rare Metals 2024年第6期43卷 2719-2729页

作者： Yao Yao Qiao Chen Yan-Qi Li Xian-He Huang Wei-Wei Ling Zhe-MiaoXie Jia-QiWang Chang-Ming Chen College of Communication Engineering Chengdu University of Information TechnologyChengdu 610225China School of Automation Chongqing University of Posts and TelecommunicationsChongqing 400065China School of Automation Engineering University of Electronic Science and Technology of ChinaChengdu 611731China Advanced Micro-/Nano-Devices Lab Department of Systems Design EngineeringUniversity of WaterlooWaterlooON N2L 3GlCanada

To address the challenge of achieving both high sensitivity and a high quality factor in quartz crystal microbalance(QCM)humidity sensors,a nanodiamond(ND)/Ti_(3)C_(2)MXene composite-coated QCM humidity sensor was *** material characteristics of ND,Ti_(3)C_(2)MXene,and ND/Ti_(3)C_(2)MXene composite were analyzed by transmission electron microscopy(TEM)and Fourier transform infrared(FTIR)*** experimental results demonstrated that the hydrophilic ND nanoparticles coated on Ti_(3)C_(2) MXene nanosheet prevented the self-stacking of Ti_(3)C_(2)MXene and enhanced the sensitivity of Ti_(3)C_(2) MXene-based QCM humidity ***,the high mechanical modulus of Ti_(3)C_(2) MXene material helped ND/Ti_(3)C_(2)MXene composite-coated QCM humidity sensor to achieve a high quality factor(>20,000).ND/Ti_(3)C_(2)MXene compositecoated QCM humidity sensor exhibited a sensitivity of 82.45 Hz/%RH,a humidity hysteresis of 1.1%RH,fast response/recovery times,acceptable repeatability,and good stability from 11.3%RH to 97.3%*** response mechanism of ND/Ti_(3)C_(2) MXene composite-coated QCM humidity sensor was analyzed in combination with a bi-exponential kinetic adsorption ***,the potential application of ND/Ti_(3)C_(2)MXene composite-coated QCM humidity sensor was demonstrated through its frequency response to wooden blocks with different moisture contents.

关键词： Humidity sensor Quartz crystal microbalance Nanodiamond Ti_(3)C_(2)MXene High quality factor

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Implementation of a wristwatch for dose measurement based on CsI detector 4

Implementation of a wristwatch for dose measurement based on...

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4th International Conference on Mechanical, Electronics, and Electrical and automation Control, METMS 2024

作者： Chen, Jiongrui Qin, Zhangjian Zhao, Chengfeng College of Nuclear Technology and Automation Engineering Chengdu University of Technology Chengdu610059 China

ISBN: (数字)9781510679887

ISBN: (纸本)9781510679870

We have implementation a wristwatch that utilizes a Silicon Photomultiplier (SiPM) and a CsI(Tl) crystal for radiation dose rate detection. Compared to traditional personal dosimeters, it offers advantages such as high detection efficiency and portability. The measurement module incorporates a scintillation detector, a composite material comprised of CsI(Tl) crystal and SiPM, complemented by a signal conditioning module that boasts a pulse shaping circuit. The wristwatch, utilizing the functionalities of the CH579M microcontroller and advanced design algorithms, can rapidly respond to sudden fluctuations in environmental radiation levels. After testing, the detector's signal-to-noise ratio was measured at 12 dB, with a pulse width of 25 µs. The actual measurement range of the wristwatch is from 0. 1 to 250 μSv/h. © 2024 SPIE.

关键词： Signal to noise ratio

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A model for image super-resolution based on Swin Transformer 7

A model for image super-resolution based on Swin Transformer

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7th International Conference on Computer Information Science and Application technology, CISAT 2024

作者： Wang, Yukun Chengdu University of Technology College of Nuclear Technology and Automation Engineering Chengdu610059 China

ISBN: (纸本)9798350375107

Biological evolution has deepened our understanding of nature. Since the advent of civilization, humans have continually explored ways to record what they see and hear, from cave sketches to camera photography, with clarity being a consistent goal. Image super-resolution technology has made significant progress, but early methods like interpolation and filtering couldn't effectively restore details. Traditional convolution methods require high computational and storage resources, limiting their use in hardware-constrained scenarios. Therefore, finding a method that reduces computational resources while ensuring effectiveness is crucial. This paper proposes the Residual Swin Transformer Block based on the Swin Transformer and designs the SR-Swin deep learning model for super-resolution image processing. Experiments show it achieves an average PSNR value of 30.6 dB, indicating good performance. © 2024 IEEE.

关键词： deep learning Image Super Resolution Swin Transformer

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The Influence of Radiation Distance on Microwave Coupling Efficiency in Microwave-assisted Rock Breakage

The Influence of Radiation Distance on Microwave Coupling Ef...

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2024 Photonics and Electromagnetics Research Symposium, PIERS 2024

作者： Zhao, Xiaoyun Chengdu University of Technology School of Nuclear Technology and Automation Engineering Chengdu610059 China

ISBN: (纸本)9798350375909

High power microwave early irradiation has a great potential in assisting excavators in breaking hard and abrasive rocks, radiation efficiency is a very important issue. The paper studied the radiation of standard rectangular waveguides on rocks at different working distances, obtained the minimum S11 parameter through CST simulation, and determined the corresponding optimal radiation position, at a working distance of 0.31λ, the S11 is minimum, which is the optimal position of the sample relative to the microwave antenna. Using this method, we can quickly and accurately obtain the efficiency of microwave coupling into rocks, can guide practical engineering applications. © 2024 IEEE.

关键词： Microwave irradiation

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