Journal of Electrostatics最新文献_第2页

Electrostatic potential measurement of floating conductive objects: Some theoretical considerations and experimental results 漂浮导电物体的静电势测量：一些理论考虑和实验结果

IF 1.9 4区工程技术

Journal of Electrostatics Pub Date : 2024-10-18 DOI: 10.1016/j.elstat.2024.103986

Pedro Llovera-Segovia , Philippe Molinié , Vicente Fuster-Roig , Alfredo Quijano-López

{"title":"Electrostatic potential measurement of floating conductive objects: Some theoretical considerations and experimental results","authors":"Pedro Llovera-Segovia , Philippe Molinié , Vicente Fuster-Roig , Alfredo Quijano-López","doi":"10.1016/j.elstat.2024.103986","DOIUrl":"10.1016/j.elstat.2024.103986","url":null,"abstract":"<div><div>The measurement of electrostatic potentials of floating conductive objects can, in principle, be performed by well-known basic experimental setups. Commercial equipment is readily available and the physical principles underlaying the problem are well established. However, electrostatic measurements require special attention, as significant errors can arise from the influence of the measuring setup or the misinterpretation of the results. First, the specificity of the measuring equipment must be well understood such as the difference between field mills, induction probes and feedback probes (also called electrostatic probes). These instruments create specific boundary conditions around the object being measured such as the introduction of grounded planes or the cancellation of the electric field. This influence is particularly significant when measuring floating objects as, for example, belts and suspended or flying objects. Even when results are provided directly in volts, their interpretation varies greatly depending on the instrument used. In the case of the field mills measurements, a calibration must be performed to convert the measured electric field into the potential of the floating object. This calibration is often performed by applying a known potential to the floating object. However, this procedure may introduce errors in the measured values due to the presence of the high voltage cable used to charge the object. We describe some examples of numerical calculations and show some experimental measurements on a levitating object.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"132 ","pages":"Article 103986"},"PeriodicalIF":1.9,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142530764","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

Experimental study of electrostatic charging related to prevention of fire and dust explosions in wood processing facilities 与防止木材加工设施火灾和粉尘爆炸有关的静电充电实验研究

IF 1.9 4区工程技术

Journal of Electrostatics Pub Date : 2024-10-02 DOI: 10.1016/j.elstat.2024.103983

Jiangtian Hou , Guilin Hu , John R. Grace , Xiaotao Bi

引用次数: 0

A method of obtaining inception voltage in spark discharge utilizing a current probe 一种利用电流探头获取火花放电起始电压的方法

IF 1.9 4区工程技术

Journal of Electrostatics Pub Date : 2024-10-01 DOI: 10.1016/j.elstat.2024.103984

Zhiyu Wang, Can Chen, Suijun Yang, Shuliang Ye

{"title":"A method of obtaining inception voltage in spark discharge utilizing a current probe","authors":"Zhiyu Wang, Can Chen, Suijun Yang, Shuliang Ye","doi":"10.1016/j.elstat.2024.103984","DOIUrl":"10.1016/j.elstat.2024.103984","url":null,"abstract":"<div><div>There is usually a significant voltage drop on the electrode during the brief delay before spark discharge occurs when the storage capacitance is small (around or below 100 pF). This leads to a decrease in capacitor energy, which may result in an overestimation of the minimum ignition energy (MIE) of dust cloud. A method that utilizes a current probe to obtain the inception discharge voltage was therefore developed. Firstly, the voltage attenuation on the electrode without spark discharge is measured, enabling an accurate calculation of parasitic capacitance. Subsequently, the inception discharge voltage in a spark discharge is calculated based on the measured spark current, thereby enabling the determination of capacitor energy before spark discharge. The results show that the fitted current curves based on the calculated inception discharge voltage exhibited consistency with the actual spark current curves, indicating that the calculated value of inception discharge voltage was consistent with the actual situation. The method effectively addresses challenges associated with measuring the inception discharge voltage in cases of small storage capacitance, which helps to calculate the capacitor energy before spark discharge for MIE testing of dust clouds that are highly sensitive to electrostatic discharge.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"132 ","pages":"Article 103984"},"PeriodicalIF":1.9,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142359107","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

Analysis and comparison of streamer discharge characteristics in equipotential live-line work gap and its simplified gaps under positive switching impulse 等电位带电线路工作间隙及其简化间隙在正开关脉冲下的流线放电特性分析与比较

IF 1.9 4区工程技术

Journal of Electrostatics Pub Date : 2024-10-01 DOI: 10.1016/j.elstat.2024.103985

Yaqi Fang, Hao Zeng, Bingsen Yang, Suhan Mao, Junkang Fang

{"title":"Analysis and comparison of streamer discharge characteristics in equipotential live-line work gap and its simplified gaps under positive switching impulse","authors":"Yaqi Fang, Hao Zeng, Bingsen Yang, Suhan Mao, Junkang Fang","doi":"10.1016/j.elstat.2024.103985","DOIUrl":"10.1016/j.elstat.2024.103985","url":null,"abstract":"<div><div>Equipotential live-line work (EPLW) is crucial for uninterrupted operation and maintenance of extra-high voltage (EHV) and ultra-high voltage (UHV) transmission lines. Determining the minimum approach distance (MAD) for EHV and UHV systems needs a thorough grasp of EPLW gap discharge mechanisms and characteristics for worker protection. Therefore, we conduct positive switching impulse discharge experiments on EPLW gap and its simplified gaps at a gap distance of 3 m, study the discharge development process and streamer inception characteristics of two gaps, and perform comparative analysis. The experimental results show that sim-worker's feet-test tower gap and the bundle conductor + rod-plane gaps (rod electrode with radii of 2.5 cm and 5 cm) occur multiple streamer inception. The bundle conductor + rod electrode with a radius of 8 cm only has one streamer inception. The average inception voltage, inception time delay and its dispersion of bundle conductor + rod electrode will all rise with the size of the electrode. Compared to the bundle conductor + rod electrodes with radii of 2.5 cm and 8 cm, the average streamer inception time delay and inception voltage of sim-worker's feet are only 3.6 % and 5.1 % subtly higher than those of the bundle conductor + rod electrode with a radius of 5 cm, and a high degree of similarity is exhibited in their probability distribution trends of streamer inception time delay. A larger electrode size will increase the boost time delay, statistical time delay, and its dispersion of bundle conductor + rod electrode, they are closer to sim-worker's feet when the radius of bundle conductor + rod electrode is 5 cm.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"132 ","pages":"Article 103985"},"PeriodicalIF":1.9,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142359108","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

Advanced image reconstruction for electrostatic tomography in gas-solid two-phase flow based on convolutional autoencoder neural network 基于卷积自动编码器神经网络的先进气固两相流静电断层图像重建技术

IF 1.9 4区工程技术

Journal of Electrostatics Pub Date : 2024-09-27 DOI: 10.1016/j.elstat.2024.103979

Jiahe Lyu, Xuezhen Cheng, Zhen Song, Jiming Li

{"title":"Advanced image reconstruction for electrostatic tomography in gas-solid two-phase flow based on convolutional autoencoder neural network","authors":"Jiahe Lyu, Xuezhen Cheng, Zhen Song, Jiming Li","doi":"10.1016/j.elstat.2024.103979","DOIUrl":"10.1016/j.elstat.2024.103979","url":null,"abstract":"<div><div>The image reconstruction of flowing charged particles in gas-solid two-phase (GSTP) flow can be achieved through electrostatic tomography (EST). Accurate image reconstruction is crucial for detecting the movement patterns of the particles. In order to improve the quality of reconstructed images, a unique convolutional autoencoder neural network (CANN) is proposed. This study uses an image set generated by the linear backprojection (LBP) algorithm to train the CANN, which consists of an encoder and a decoder. The encoder utilizes convolutional and max-pooling layers to reduce the dimensionality of the images and extract key features, while the decoder restores and reconstructs the images through up-sampling and convolutional operations to closely approximate the reference image. To prevent overfitting, dropout layers are introduced after each max-pooling layer in the encoder. To verify the anti-noise capability of the network, Gaussian white noise ranging from 10 dB to 20 dB is added to the test set. The proposed CANN has been validated through simulations and experiments, demonstrating its effectiveness in overcoming noticeable artifacts and noise in reconstructed images when identifying GSTP flow patterns. Furthermore, it shows significant enhancements in imaging outcomes compared to conventional image reconstruction techniques and some current deep learning algorithms.</div></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"132 ","pages":"Article 103979"},"PeriodicalIF":1.9,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142326345","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

Electrostatic charging of material webs in gravure printing presses 凹版印刷机材料卷筒的静电充电

IF 1.9 4区工程技术

Journal of Electrostatics Pub Date : 2024-09-19 DOI: 10.1016/j.elstat.2024.103980

Alexander Götz , Armin Wolfram , Wolfgang Schubert

引用次数: 0

Experimental study on the flow electrification in intact and leak pipelines 完整和泄漏管道中的流动电气化实验研究

IF 1.9 4区工程技术

Journal of Electrostatics Pub Date : 2024-09-18 DOI: 10.1016/j.elstat.2024.103981

Xu Diao , Juncheng Jiang , Lei Ni , Ahmed Mebarki , Yong Pan

引用次数: 0

Aqueous bromide oxidized with pulsed corona discharge 脉冲电晕放电氧化溴水

IF 1.9 4区工程技术

Journal of Electrostatics Pub Date : 2024-09-09 DOI: 10.1016/j.elstat.2024.103978

Irina Petrochenko, Sergei Preis

引用次数: 0

A new method for calculating the electric field distribution in particle-particle rotating systems 计算粒子-粒子旋转系统中电场分布的新方法

IF 1.9 4区工程技术

Journal of Electrostatics Pub Date : 2024-09-01 DOI: 10.1016/j.elstat.2024.103967

Yongqiang Kang, Jialin Zhang, Zhipeng Shi, Xuhong Pu, Shuaibing Li

{"title":"A new method for calculating the electric field distribution in particle-particle rotating systems","authors":"Yongqiang Kang, Jialin Zhang, Zhipeng Shi, Xuhong Pu, Shuaibing Li","doi":"10.1016/j.elstat.2024.103967","DOIUrl":"10.1016/j.elstat.2024.103967","url":null,"abstract":"<div><p>In the applied electric field, the behavioral characteristic which occurs in particle-particle systems always are used in dielectric insulation, and nanomaterials regulation, among which is the key to correctly compute the electric field. Because the dipole model without fully considering the particle interactions so that has defects in computing in some cases. This study introduced the mutual-coupling dipole offset distance <em>τ</em> used to describe the degree of inter-particle interaction, the analytical expression of the mutual-coupling dipole moment under the two types of the electric field is obtained, respectively. An original model is established, and by comparison with the finite element method, it is found that even when <em>D</em> = 0.1<em>R</em> and <em>ε</em><sub>pp</sub>/<em>ε</em><sub>f</sub> = 25, the proposed model can describe the inter-particle interaction effectively, and its computational precision better than that of the classical model, which can realize the accurate computation of the electric field distribution around the particle-particle rotating system.</p></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"132 ","pages":"Article 103967"},"PeriodicalIF":1.9,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142117656","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

Measure for intensity of electrostatic interaction between two disjoint sets of charged conductors 测量两组不相连的带电导体之间的静电相互作用强度

IF 1.9 4区工程技术

Journal of Electrostatics Pub Date : 2024-08-19 DOI: 10.1016/j.elstat.2024.103966

Filip Vučić

引用次数: 0