IEEE Transactions on Instrumentation and Measurement最新文献_第8页

Factor Screening for Equivalence Ratio Measurement Modeling: A Hybrid Approach Integrating Random Forest Algorithm and Support Vector Regression 等效比率测量模型的因子筛选：一种结合随机森林算法和支持向量回归的混合方法

IF 5.6 2区工程技术

IEEE Transactions on Instrumentation and Measurement Pub Date : 2025-04-04 DOI: 10.1109/TIM.2025.3553950

Bangchao Wang;Zhengguo You;Yufeng Lai;Yunbai Wang;Lukai Zheng;Matthew Davies;Jon R. Willmott;Yang Zhang;Jiansheng Yang

{"title":"Factor Screening for Equivalence Ratio Measurement Modeling: A Hybrid Approach Integrating Random Forest Algorithm and Support Vector Regression","authors":"Bangchao Wang;Zhengguo You;Yufeng Lai;Yunbai Wang;Lukai Zheng;Matthew Davies;Jon R. Willmott;Yang Zhang;Jiansheng Yang","doi":"10.1109/TIM.2025.3553950","DOIUrl":"https://doi.org/10.1109/TIM.2025.3553950","url":null,"abstract":"Measuring the equivalence ratio using flame spectral data is a key focus in combustion diagnostic techniques. Traditional methods rely on chemiluminescent bands with distinct spectral features, which may not fully leverage the richness of hyperspectral data. In this article, we propose a method for screening strongly correlated spectral features for equivalence ratio measurement modeling from spectral data using the random forest (RF) algorithm. The RF evaluates and ranks the influence of each wavelength on the equivalence ratio regression model by calculating the mean square error (mse) at each feature wavelength. Wavelengths with higher scores are selected as model factors, which are then used to construct specific equivalence ratio measurement models by support vector regression (SVR). The constructed equivalence ratio measurement model achieved an mse of 0.0019 and a coefficient of determination (<inline-formula> <tex-math>$R^{2}$ </tex-math></inline-formula>) value of 0.96, demonstrating the model’s strong predictive capability and generalization ability.","PeriodicalId":13341,"journal":{"name":"IEEE Transactions on Instrumentation and Measurement","volume":"74 ","pages":"1-11"},"PeriodicalIF":5.6,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143830561","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Experimental and Mechanistic Study on the Calibration of High-g Accelerometers With Different Pulsewidth Excitations 不同脉宽激励下高加速度计标定的实验与机理研究

IF 5.6 2区工程技术

IEEE Transactions on Instrumentation and Measurement Pub Date : 2025-04-04 DOI: 10.1109/TIM.2025.3557827

Zhenhai Zhang;Fei Teng

{"title":"Experimental and Mechanistic Study on the Calibration of High-g Accelerometers With Different Pulsewidth Excitations","authors":"Zhenhai Zhang;Fei Teng","doi":"10.1109/TIM.2025.3557827","DOIUrl":"https://doi.org/10.1109/TIM.2025.3557827","url":null,"abstract":"High-precision accelerometers are crucial in high-speed impact testing and precise detonation control of penetration fuzes. Calibration results of high-g accelerometers under narrow and wide pulsewidth impact conditions, however, show certain discrepancies, directly affecting the accelerometers’ measurement accuracy and application scenarios. This article focuses on studying the differences in the calibration of high-g accelerometer sensitivity using the narrow pulsewidth excitation method of the Hopkinson bar and the wide pulsewidth excitation method of the air cannon. The mechanisms behind these differences are quantitatively revealed, and the intrinsic relationship between the two calibration methods is established. First, calibration experiments were conducted on the same batch of accelerometers using both impact methods. Next, the linearity indices of the calibration results from both methods were calculated. Then, the differences in the calibration results of the two methods were analyzed and compared, followed by a detailed quantitative investigation of the underlying mechanisms behind these differences. Finally, an empirical formula was established through linear regression analysis to correlate the calibration results of the two excitation methods. The results indicate that there is indeed a difference in sensitivity between the two calibration methods. This difference is unrelated to the peak value of the excitation acceleration. It is, however, mainly influenced by the pulsewidth of the excitation acceleration and the amplitude-frequency characteristics of the accelerometer.","PeriodicalId":13341,"journal":{"name":"IEEE Transactions on Instrumentation and Measurement","volume":"74 ","pages":"1-11"},"PeriodicalIF":5.6,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143848793","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Experimental Investigation and Prediction of Droplet Entrainment Fraction in Horizontal Annular Flow 水平环形流中液滴夹杂率的实验研究与预测

IF 5.6 2区工程技术

IEEE Transactions on Instrumentation and Measurement Pub Date : 2025-04-04 DOI: 10.1109/TIM.2025.3557809

Maosen Wang;Dandan Zheng;Ying Xu

{"title":"Experimental Investigation and Prediction of Droplet Entrainment Fraction in Horizontal Annular Flow","authors":"Maosen Wang;Dandan Zheng;Ying Xu","doi":"10.1109/TIM.2025.3557809","DOIUrl":"https://doi.org/10.1109/TIM.2025.3557809","url":null,"abstract":"Droplet entrainment fraction significantly affects pressure drop and heat transfer in annular flow. In a 50 mm horizontal pipe, the entrained droplet parameters, including droplet fraction, velocity, size, and mass flux, are measured by an optical fiber probe, revealing the characteristic distribution and flow mechanism of droplets under gravity. Next, the entrainment fraction is derived by integrating the exponential distribution of local droplet mass flux. Then, a database of entrainment fractions in horizontal annular flow is established to evaluate four recognized entrainment models. These models exhibit significant scatter and uncertainties in their predictions and are often limited to specific flow regimes. In order to improve the accuracy and applicability of the model, a neural network is established to predict the droplet entrainment fraction, and the optimal hyperparameters of the network are determined by the Bayes optimization method. Compared to existing models, the new model significantly improves the prediction accuracy of droplet entrainment fraction under different conditions. The determination coefficient <inline-formula> <tex-math>$R^{2}$ </tex-math></inline-formula> reaches 0.954, with over 82.5% of prediction errors within ±30%, showing satisfactory agreement with experiments.","PeriodicalId":13341,"journal":{"name":"IEEE Transactions on Instrumentation and Measurement","volume":"74 ","pages":"1-17"},"PeriodicalIF":5.6,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143860940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Fleet State-Aware Aero-Engine Fleet Collaborative Maintenance: A PPO-Enhanced and Maintenance Urgency-Aware Decision Mechanism 机队状态感知航空发动机机队协同维修：一种ppo增强的维修紧急感知决策机制

IF 5.6 2区工程技术

IEEE Transactions on Instrumentation and Measurement Pub Date : 2025-04-04 DOI: 10.1109/TIM.2025.3555729

Jiawei Ren;Ying Cheng;Ruqiang Yan;Fei Tao

引用次数: 0

A Fully Integrated Eddy-Current Sensor With Dual Stages for Absolute Angle Measurement 一种完全集成的双级绝对角度测量涡流传感器

IF 5.6 2区工程技术

IEEE Transactions on Instrumentation and Measurement Pub Date : 2025-04-04 DOI: 10.1109/TIM.2025.3557828

Bingyuan Wang;Xinquan Lai;Zhiwen Niu;Linxi Li

引用次数: 0

A High-Efficiency Self-Powered Wireless Sensor Network Driven by Ambient RF Energy Far-Field 基于环境射频能量远场驱动的高效自供电无线传感器网络

IF 5.6 2区工程技术

IEEE Transactions on Instrumentation and Measurement Pub Date : 2025-04-04 DOI: 10.1109/TIM.2025.3552865

Yanping Fan;Ningcheng Wu;Yumei Wen;Dawei Zhang

{"title":"A High-Efficiency Self-Powered Wireless Sensor Network Driven by Ambient RF Energy Far-Field","authors":"Yanping Fan;Ningcheng Wu;Yumei Wen;Dawei Zhang","doi":"10.1109/TIM.2025.3552865","DOIUrl":"https://doi.org/10.1109/TIM.2025.3552865","url":null,"abstract":"Wireless self-powered systems based on RF energy harvesting (RFEH) have emerged as an effective solution to the energy challenges in Internet of Things (IoT) devices. However, two critical challenges still persist: low energy-harvesting efficiency at the receiver under low power conditions typical of long-distance scenarios, and the power range of RFEH not being suitable for most low-power IoT applications. To solve these problems, we proposed a high-efficiency RFEH system with a wide input power range and high sensitivity. We employed harmonic suppression technology to mitigate higher-order harmonics generated by diodes and used radial stubs instead of capacitors and inductors to reduce insertion losses and parasitic effects. The proposed rectifier achieves a peak power efficiency of 74.4% at 9.5 dBm. Efficiency remains above 50% in the input power range of −8–15.5 dBm and exceeds 70% between 2.5 and 11.5 dBm. Even at −14 dBm, a power conversion efficiency (PCE) of 30% is maintained, significantly improving the efficiency of RFEH. Building on this RFEH system, we propose a dual-mode self-powered wireless sensor network system. Experimental results demonstrate that the low-power mode can operate up to 6 m away and have a minimum sensitivity of −10 dBm. The high-power (7 mW) mode can continuously monitor strain information for over 4.5 h at 1 m. This system provides a solution for the widespread application of IoT in the future.","PeriodicalId":13341,"journal":{"name":"IEEE Transactions on Instrumentation and Measurement","volume":"74 ","pages":"1-10"},"PeriodicalIF":5.6,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143830565","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Design and Properties of SQUID Sensors With Octagonal Double Transformer for Cryogenic Current Comparator 低温电流比较仪用八角形双变压器 SQUID 传感器的设计与特性

IF 5.6 2区工程技术

IEEE Transactions on Instrumentation and Measurement Pub Date : 2025-04-04 DOI: 10.1109/TIM.2025.3557831

Da Xu;Qing Chen;Zhenyu Yang;Jinjin Li;Wenhui Cao;Wei Li;Kunli Zhou;Yunfeng Lu;Jianting Zhao;Qing Zhong

{"title":"Design and Properties of SQUID Sensors With Octagonal Double Transformer for Cryogenic Current Comparator","authors":"Da Xu;Qing Chen;Zhenyu Yang;Jinjin Li;Wenhui Cao;Wei Li;Kunli Zhou;Yunfeng Lu;Jianting Zhao;Qing Zhong","doi":"10.1109/TIM.2025.3557831","DOIUrl":"https://doi.org/10.1109/TIM.2025.3557831","url":null,"abstract":"Superconducting quantum interference devices (SQUIDs) with large input inductance and octagonal double transformer were designed and fabricated using Nb/Al-AlOx/Nb Josephson junctions (JJs) for cryogenic current comparator (CCC). A 30-turn input coil of 1.5 <inline-formula> <tex-math>$mu $ </tex-math></inline-formula> H is coupled to a large octagonal transformer of 3.6 nH, and the counterpart of the transformer is a 1.5-turn coil of 3.0 nH coupled to a second-order gradiometric SQUID of 97 pH. The octagonal double transformer makes low-inductance SQUID easily match the large-inductance input coil. A current sensitivity of 1.1 <inline-formula> <tex-math>$mu $ </tex-math></inline-formula> A/<inline-formula> <tex-math>$Phi _{0}$ </tex-math></inline-formula>, a flux noise of 3.8 <inline-formula> <tex-math>$mu $ </tex-math></inline-formula><inline-formula> <tex-math>$Phi _{0}$ </tex-math></inline-formula>/<inline-formula> <tex-math>$surd $ </tex-math></inline-formula> Hz at 4 kHz, and 9.7 <inline-formula> <tex-math>$mu $ </tex-math></inline-formula><inline-formula> <tex-math>$Phi _{0}$ </tex-math></inline-formula>/<inline-formula> <tex-math>$surd $ </tex-math></inline-formula> Hz at 1 Hz were achieved at 4.2 K. Another SQUID sensor with ten-turn input coil of 0.5 <inline-formula> <tex-math>$mu $ </tex-math></inline-formula> H coupled to a large octagonal transformer of 6.0 nH, which is coupled to a first-order gradiometric SQUID of 580 pH, achieves a lower-current sensitivity of 0.5 <inline-formula> <tex-math>$mu $ </tex-math></inline-formula> A/<inline-formula> <tex-math>$Phi _{0}$ </tex-math></inline-formula> and a flux noise of 17 <inline-formula> <tex-math>$mu $ </tex-math></inline-formula><inline-formula> <tex-math>$Phi _{0}$ </tex-math></inline-formula>/<inline-formula> <tex-math>$surd $ </tex-math></inline-formula> Hz at 4 kHz.","PeriodicalId":13341,"journal":{"name":"IEEE Transactions on Instrumentation and Measurement","volume":"74 ","pages":"1-6"},"PeriodicalIF":5.6,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143856216","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 Wireless Portable System With Few Electrodes Using Thoracic Electrical Signals for Long-Term and Real-Time Hemodynamic Monitoring 一种使用胸电信号进行长期实时血流动力学监测的无线便携系统

IF 5.6 2区工程技术

IEEE Transactions on Instrumentation and Measurement Pub Date : 2025-04-04 DOI: 10.1109/TIM.2025.3557807

Runyu Ni;Xinhai Li;Huimeng Zhao;Zhong Ji

{"title":"A Wireless Portable System With Few Electrodes Using Thoracic Electrical Signals for Long-Term and Real-Time Hemodynamic Monitoring","authors":"Runyu Ni;Xinhai Li;Huimeng Zhao;Zhong Ji","doi":"10.1109/TIM.2025.3557807","DOIUrl":"https://doi.org/10.1109/TIM.2025.3557807","url":null,"abstract":"Continuous, long-term hemodynamic monitoring is crucial for enhancing the prevention and diagnosis of cardiovascular diseases (CVDs). This study introduces a system that extracts impedance cardiography (ICG), electrocardiography (ECG), and respiratory (RESP) signals from thoracic electrical signals using only four electrodes. A wireless, portable hemodynamic monitoring system has been developed, capable of acquiring multimodal physiological signals, including ICG, ECG, and photoplethysmography (PPG), among others. A signal processing approach was developed, combining the timefrequency characteristics and temporal correlations of the signals. This method includes signal denoising and locating characteristic points, enabling the real-time calculation of hemodynamic parameters such as cardiac output (CO). Furthermore, an artificial neural network is constructed based on various features extracted from the multimodal physiological signals to estimate blood pressure (BP). The device measures <inline-formula> <tex-math>$85times 48times 18$ </tex-math></inline-formula> mm, weighs 76 g, and consumes 260 mW of power. It can operate continuously for at least 24 h. When compared to a commercial bedside hemodynamic monitoring device, the consistency of the key measured hemodynamic parameters is relatively high. The system shows promising applications in diagnosing CVDs and managing chronic cardiovascular conditions.","PeriodicalId":13341,"journal":{"name":"IEEE Transactions on Instrumentation and Measurement","volume":"74 ","pages":"1-13"},"PeriodicalIF":5.6,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143865370","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Laser Scanning System for Hydrophilicity Mapping on Curved Surfaces 曲面亲水性测绘的激光扫描系统

IF 5.6 2区工程技术

IEEE Transactions on Instrumentation and Measurement Pub Date : 2025-04-04 DOI: 10.1109/TIM.2025.3557818

Yen-Wei Chao;Chun-Yu Yeh;Shan-Ya Tsao;Yi-Chen Chen;Feng-Sheng Kao;Jen-You Chu;Hsien-Shun Liao

引用次数: 0

Thermal Transport Measurement in Photothermal Graphene Nanomechanical Resonator 光热石墨烯纳米机械谐振器的热输运测量

IF 5.6 2区工程技术

IEEE Transactions on Instrumentation and Measurement Pub Date : 2025-04-03 DOI: 10.1109/TIM.2025.3556221

Zhen Wan;Cheng Li;Yang Liu;Zhengwei Wu;Shangchun Fan

引用次数: 0