IEEJ Transactions on Electrical and Electronic Engineering最新文献_第6页

A Vision-Based Technique for Ice-Coating Shape Measurement of Transmission Lines Conductor 基于视觉的输电线路导体覆冰形状测量技术

IF 1 4区工程技术

IEEJ Transactions on Electrical and Electronic Engineering Pub Date : 2025-04-30 DOI: 10.1002/tee.70052

Ye Zhang, Luyao Wang, Pengchao Zhai, Long Zhao

{"title":"A Vision-Based Technique for Ice-Coating Shape Measurement of Transmission Lines Conductor","authors":"Ye Zhang, Luyao Wang, Pengchao Zhai, Long Zhao","doi":"10.1002/tee.70052","DOIUrl":"https://doi.org/10.1002/tee.70052","url":null,"abstract":"Icing of overhead transmission lines can affect the safe operation of the power distribution and transmission grid due to the additional weight load of the accumulated ice-coating on transmission line conductors. Analyzing the shape of ice accumulation on transmission line conductors helps promote the calculation of ice thickness and weight. In this paper, we present a system for analyzing the shape of ice accumulation based on two digital cameras and an offline processing algorithm. The two cameras separately acquire an image sequence of the iced conductor from the top view and the front view. Then, an image processing algorithm extracts the conductor contour and measures both the diameters of the iced conductor images captured by the two cameras at the same point. An irregular-shape ice coating accumulation model is established and used to describe the cross-sectional ice coating shape of the accumulated ice on the conductor. Finally, a mathematical model for the ice coating weight is established. The proposed system was tested in laboratory experiments using two digital cameras with good low-temperature resistance. The experimental analysis results show that the average error ratio of the proposed irregular shape ice accumulation model in terms of area and thickness fitting are 0.0398 and 0.0612, respectively. © 2025 Institute of Electrical Engineers of Japan and Wiley Periodicals LLC.","PeriodicalId":13435,"journal":{"name":"IEEJ Transactions on Electrical and Electronic Engineering","volume":"20 8","pages":"1176-1185"},"PeriodicalIF":1.0,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144574273","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Attention-Guided Food Bolus Segmentation in Ultrasound Imaging for Dysphagia Rehabilitation 注意引导下食物丸分割在吞咽困难康复超声成像中的应用

IF 1.1 4区工程技术

IEEJ Transactions on Electrical and Electronic Engineering Pub Date : 2025-04-30 DOI: 10.1002/tee.70041

Qibo Gao, Yoshihiro Hagihara, Makoto Sasaki, Katsuya Hotta

{"title":"Attention-Guided Food Bolus Segmentation in Ultrasound Imaging for Dysphagia Rehabilitation","authors":"Qibo Gao, Yoshihiro Hagihara, Makoto Sasaki, Katsuya Hotta","doi":"10.1002/tee.70041","DOIUrl":"https://doi.org/10.1002/tee.70041","url":null,"abstract":"Dysphagia impairs the ability to eat and increases the risk of aspiration pneumonia and choking. Dysphagia rehabilitation often requires strengthening the muscles that transport residual food boluses from the pharynx to the stomach. Detecting food boluses in the pharynx is a crucial early indicator of aspiration risk during rehabilitation and is vital for patient safety. However, prior detection methods are invasive and rely on extensive equipment, making them unsuitable for routine clinical application. To address these limitations, we focus on food bolus segmentation in ultrasonography, which minimizes patient burden. In this paper, we propose a swallowing ultrasound image dataset designed to support supervised learning approaches for food bolus segmentation. It contains ultrasound images capturing the swallowing reflex with seven types of food, accompanied by pixel-precise ground-truth annotations for all food boluses. We also propose a novel segmentation framework to address image noise and class imbalance in the data. Specifically, we introduce attention gate modules to suppress irrelevant feature activation in noisy regions like the esophageal wall. Moreover, we employ a learning strategy targeting food bolus regions to mitigate class imbalance due to their small size. Extensive experiments demonstrate the effectiveness of our framework for food bolus segmentation in ultrasound images. © 2025 The Author(s). IEEJ Transactions on Electrical and Electronic Engineering published by Institute of Electrical Engineers of Japan and Wiley Periodicals LLC.","PeriodicalId":13435,"journal":{"name":"IEEJ Transactions on Electrical and Electronic Engineering","volume":"20 11","pages":"1757-1765"},"PeriodicalIF":1.1,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/tee.70041","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145197290","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Validating the Accuracy of the ‘Measurement of Baby's Head Shape™’ Mobile Application 验证“婴儿头部形状测量™”移动应用程序的准确性

IF 1.1 4区工程技术

IEEJ Transactions on Electrical and Electronic Engineering Pub Date : 2025-04-29 DOI: 10.1002/tee.70039

Atsuko Nakahari, Shigeharu Hosono, Akira Gomi, Isao Kusakawa, Ichiro Tanaka

{"title":"Validating the Accuracy of the ‘Measurement of Baby's Head Shape™’ Mobile Application","authors":"Atsuko Nakahari, Shigeharu Hosono, Akira Gomi, Isao Kusakawa, Ichiro Tanaka","doi":"10.1002/tee.70039","DOIUrl":"https://doi.org/10.1002/tee.70039","url":null,"abstract":"In Japan, positional cranial deformities (PCD) have received limited attention. At present, objective evaluation of the severity of cranial deformity requires specialized equipment and software that are not suitable for screening. The ‘Measurement of a baby's head shape™’ (Japan Medical Company) application quantifies plagiocephaly and brachycephaly using mobile device images. However, the reliability and suitability of this application for screening PCD have yet to be verified. This study aimed to verify the reliability of the application and evaluate its suitability as a screening tool. Using 10 different head models created with a three-dimensional (3D) printer, a total of 91 medical professionals examined 825 images using a mobile application to determine the severity of plagiocephaly and brachycephaly. Accuracy tests and measurement error factors were statistically analyzed. Regarding measurement error analysis, the shooting angle and distance information were obtained from four QR codes for the pedestal of the head model; the difference between the points specified by the application and design location (true value) was determined in 3D coordinate space. The sensitivity and specificity for plagiocephaly were 0.72 and 0.96, respectively, while for brachycephaly, they were 0.90 and 1.00. No statistically significant correlation was found between measurement errors and factors such as marking inaccuracies or occupational category. The “Measurement of a baby's head shape™” application could be used by medical professionals to perform cranial deformity screening following the measurement method guidelines when imaging is performed. © 2025 The Author(s). IEEJ Transactions on Electrical and Electronic Engineering published by Institute of Electrical Engineers of Japan and Wiley Periodicals LLC.","PeriodicalId":13435,"journal":{"name":"IEEJ Transactions on Electrical and Electronic Engineering","volume":"20 11","pages":"1705-1716"},"PeriodicalIF":1.1,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/tee.70039","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145197099","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Improved Sliding Mode Observer with Adaptive Fuzzy Logic Control for Efficient PMSM Sensorless Speed Regulation 基于自适应模糊逻辑控制的改进滑模观测器在永磁同步电机无传感器调速中的应用

IF 1.1 4区工程技术

IEEJ Transactions on Electrical and Electronic Engineering Pub Date : 2025-04-29 DOI: 10.1002/tee.70042

Dung Hoang Vo, Truong Phuoc Hoa, Minh Duc Pham

{"title":"Improved Sliding Mode Observer with Adaptive Fuzzy Logic Control for Efficient PMSM Sensorless Speed Regulation","authors":"Dung Hoang Vo, Truong Phuoc Hoa, Minh Duc Pham","doi":"10.1002/tee.70042","DOIUrl":"https://doi.org/10.1002/tee.70042","url":null,"abstract":"Speed control of Permanent Magnet Synchronous Motors (PMSMs) in industrial applications often relies on Hall and encoder sensors. However, these sensors usually increase system maintenance costs, and their performance is susceptible to industrial environmental factors such as electromagnetic interference (EMI) and mechanical vibrations. To overcome these issues, this study proposes an improved Sliding Mode Observer (SMO) with an adaptive fuzzy logic controller to regulate the speed of PMSMs without relying on Hall and encoders. The proposed method adopts a hyperbolic tangent function instead of the conventional signum function. This results in smoother control transitions, which reduce chattering effects and improve noise tolerance. In addition, the adaptive fuzzy logic controller dynamically adjusts the SMO control gain based on feedback from the estimated speed and its error, which improves control efficiency under various operating conditions. In principle, the improved SMO controller uses a hyperbolic tangent function with updated gain in real time to estimate the alpha and beta components of the back-electromotive voltage. These components are then used to calculate the rotor position and speed. By adjusting the control gain in real time, the proposed method improves the control performance compared to the conventional SMO method. Simulation results with various scenarios have shown improvements in start-up response, settling time, and overshoot reduction. The PMSM experimental system has further confirmed the effectiveness of the proposed method, which highlights its applicability in practice. © 2025 Institute of Electrical Engineers of Japan and Wiley Periodicals LLC.","PeriodicalId":13435,"journal":{"name":"IEEJ Transactions on Electrical and Electronic Engineering","volume":"20 11","pages":"1846-1855"},"PeriodicalIF":1.1,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145197278","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Specialized Variational Autoencoder for Cost-Efficient Pedestrian Trajectory Prediction 一种高效行人轨迹预测的专用变分自编码器

IF 1 4区工程技术

IEEJ Transactions on Electrical and Electronic Engineering Pub Date : 2025-04-28 DOI: 10.1002/tee.70053

Dongchen Li, Zhimao Lin, Jinglu Hu

{"title":"A Specialized Variational Autoencoder for Cost-Efficient Pedestrian Trajectory Prediction","authors":"Dongchen Li, Zhimao Lin, Jinglu Hu","doi":"10.1002/tee.70053","DOIUrl":"https://doi.org/10.1002/tee.70053","url":null,"abstract":"The prediction of pedestrian trajectories represents a crucial and widely discussed topic in the field of AI-driven traffic scenarios. The prediction of pedestrian trajectories is constrained by two factors. First, pedestrians do not have the same traffic rule constraints as vehicles. Second, the computational power of in-vehicle systems is limited. This renders the application of traditional methods challenging. Previous methods have been observed to utilize redundant information, which can result in feature imbalance and the potential for model overfitting. In light of these limitations, we propose a lightweight conditional variational autoencoder model with post-process (L-CVAE-P) for pedestrian prediction scenarios. The L-CVAE-P focuses on the efficient interaction of multidimensional features to achieve a comprehensive enhancement of the model for real-world use. The model is tested on two public datasets and achieved state-of-the-art performance, while maintaining efficiency. The experimental results demonstrate that our work has developed and optimized a pedestrian trajectory prediction model for practical applications. © 2025 The Author(s). IEEJ Transactions on Electrical and Electronic Engineering published by Institute of Electrical Engineers of Japan and Wiley Periodicals LLC.","PeriodicalId":13435,"journal":{"name":"IEEJ Transactions on Electrical and Electronic Engineering","volume":"20 8","pages":"1240-1249"},"PeriodicalIF":1.0,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/tee.70053","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144574284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Self-Switching Topology for Three Coils Structure Wireless Power Transfer System with Constant Current and Constant Voltage 恒流恒压三线圈结构无线电力传输系统的自开关拓扑

IF 1.1 4区工程技术

IEEJ Transactions on Electrical and Electronic Engineering Pub Date : 2025-04-28 DOI: 10.1002/tee.70016

Pengfei Gao, Yafang Shi, Fangyuan He, Jie Wu, Yafei Chen, Yiming Ji

{"title":"A Self-Switching Topology for Three Coils Structure Wireless Power Transfer System with Constant Current and Constant Voltage","authors":"Pengfei Gao, Yafang Shi, Fangyuan He, Jie Wu, Yafei Chen, Yiming Ji","doi":"10.1002/tee.70016","DOIUrl":"https://doi.org/10.1002/tee.70016","url":null,"abstract":"With the development of the transportation industry, the demand for road health conditions is also increasing. Therefore, a significant number of road health monitoring sensors need to be deployed. However, charging sensors buried in the ground is a challenge. A self-switching topology suitable for wireless power transmission (WPT) systems with a constant current (CC) and constant voltage (CV) three-coil structure is proposed to solve the problems of overcharging or undercharging of wired power sources and batteries. The system has established a theoretical model based on the LCC/S-S-S circuit theory and conducted data analysis. The three-coil structure WPT system achieves CC/CV output characteristics through the topology self-switching by changing the working states of two relays. Based on the proposed CC/CV WPT system self-switching topology, an experimental platform was built, and experiments were conducted to verify the correctness of the theoretical analysis. The experimental results show that the proposed self-switching topology can achieve CC/CV switching, and the system can achieve a maximum efficiency of 89.8% at a power of 225.8 W. The proposed method can effectively enhance the transmission distance and solve the problems of overcharging or undercharging of the battery. © 2025 Institute of Electrical Engineers of Japan and Wiley Periodicals LLC.","PeriodicalId":13435,"journal":{"name":"IEEJ Transactions on Electrical and Electronic Engineering","volume":"20 9","pages":"1460-1469"},"PeriodicalIF":1.1,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144767968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Searching for Stiffness Singularity Using Directional Palpation by a Microfinger and its Scanning Condition Dependence 微指定向触诊刚度奇异点搜索及其扫描条件依赖性

IF 1 4区工程技术

IEEJ Transactions on Electrical and Electronic Engineering Pub Date : 2025-04-28 DOI: 10.1002/tee.70029

Yuto Hori, Satoshi Konishi

{"title":"Searching for Stiffness Singularity Using Directional Palpation by a Microfinger and its Scanning Condition Dependence","authors":"Yuto Hori, Satoshi Konishi","doi":"10.1002/tee.70029","DOIUrl":"https://doi.org/10.1002/tee.70029","url":null,"abstract":"Minimally invasive treatment has recently emerged as a dominant procedure, as it reduces the patients' physical burden. However, it is still limited by the lack of tactile-sensation feedback from the invading device. We have reported a technology for conducting stiffness-singularity search in an elastic object based on palpation using a microfinger that was integrated with an artificial muscle and a tactile sensor. Here, to advance the application of the technology in medical diagnosis, we focused on tumor detection facilitated by palpation diagnosis using the microfinger. Notably, the miniaturized microfinger exhibits bending actuation, which imparts it with directivity. We have demonstrated an efficient searching method for singularities based on the directivity of the microfinger. Here, we estimated the condition dependence of the search method, as it is key to achieving the application of palpation diagnosis, and confirmed the accuracy of the proposed technology for estimating singularities. Thus, we present a highly efficient search method that offers feedback on tactile information. © 2025 Institute of Electrical Engineers of Japan and Wiley Periodicals LLC.","PeriodicalId":13435,"journal":{"name":"IEEJ Transactions on Electrical and Electronic Engineering","volume":"20 7","pages":"1128-1133"},"PeriodicalIF":1.0,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144256565","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Solenoid Stroke Measurement Method Using Two Points of PWM Drive Current 采用两点PWM驱动电流的电磁行程测量方法

IF 1.1 4区工程技术

IEEJ Transactions on Electrical and Electronic Engineering Pub Date : 2025-04-28 DOI: 10.1002/tee.70032

Junichi Akita

引用次数: 0

Structural and Surface Characterization of PZT (52/48) Films Deposited by Spin Coating Method 旋转镀膜法沉积PZT（52/48）薄膜的结构和表面表征

IF 1.1 4区工程技术

IEEJ Transactions on Electrical and Electronic Engineering Pub Date : 2025-04-28 DOI: 10.1002/tee.70046

Melih Özden, Ömer Çoban, Tevhit Karacali

{"title":"Structural and Surface Characterization of PZT (52/48) Films Deposited by Spin Coating Method","authors":"Melih Özden, Ömer Çoban, Tevhit Karacali","doi":"10.1002/tee.70046","DOIUrl":"https://doi.org/10.1002/tee.70046","url":null,"abstract":"In this study, PZT (lead zirconate titanate) films were deposited on (1 0 0) oriented p-type silicon substrates using the spin-coating method, a technique known for its ability to produce thin, uniform coatings. To evaluate the structural and optical properties of the films, a range of characterizations were performed, including x-ray diffraction (XRD), scanning electron microscopy (SEM), and absorbance measurements. The XRD analysis showed that the PZT peaks corresponded to the perovskite crystalline phase, confirming the successful deposition of PZT. SEM images revealed a homogeneous surface coating with a cracked structure, and the film thickness exhibited variations influenced by the number of spin cycles. Additionally, the absorbance measurements indicated an energy band gap of 3.65 eV for the films, suggesting their potential for optoelectronic applications. Notably, it was observed that both the film thickness and particle size increased as the number of spin cycles increased, highlighting the influence of the spin-coating process on the final film properties. © 2025 Institute of Electrical Engineers of Japan and Wiley Periodicals LLC.","PeriodicalId":13435,"journal":{"name":"IEEJ Transactions on Electrical and Electronic Engineering","volume":"20 11","pages":"1679-1686"},"PeriodicalIF":1.1,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145197080","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mechanism of Contact Erosion and Estimation of Cumulative Contact Erosion under Multiple Switching in Low-Voltage Switches 低压开关多次开关下接触侵蚀机理及累积接触侵蚀估算

IF 1.1 4区工程技术

IEEJ Transactions on Electrical and Electronic Engineering Pub Date : 2025-04-27 DOI: 10.1002/tee.70038

Katsuki Hotta, Takashi Inaguchi

{"title":"Mechanism of Contact Erosion and Estimation of Cumulative Contact Erosion under Multiple Switching in Low-Voltage Switches","authors":"Katsuki Hotta, Takashi Inaguchi","doi":"10.1002/tee.70038","DOIUrl":"https://doi.org/10.1002/tee.70038","url":null,"abstract":"This paper describes both the mechanism of contact erosion under multiple switching and a method that estimates the contact erosion transition in low-voltage switches. The contact height is decreased due to the contact erosion in multiple switching, and this reduces the overtravel. The contact force is decreased by 31% and the opening velocity is decreased by 55% due to a 1 mm reduction of overtravel in the testing switch. This situation increases the bounce time in the making (closing) operation and leads to an increase arc current (Iarc) and arc duration (Δt) at make. On the other hand, the situation has almost no effect on the interruption characteristics. We clarified that IarcnΔt at the make is increased, and the contact erosion is accelerated. Based on this mechanism, we constructed a model that calculates IarcnΔt every switching. Finally, we proved that the transition of the contact erosion in multiple switching can be estimated using the model. © 2025 Institute of Electrical Engineers of Japan and Wiley Periodicals LLC.","PeriodicalId":13435,"journal":{"name":"IEEJ Transactions on Electrical and Electronic Engineering","volume":"20 10","pages":"1571-1578"},"PeriodicalIF":1.1,"publicationDate":"2025-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144927796","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0