Pub Date : 2015-11-01DOI: 10.1109/CEEM.2015.7368709
Nan Wang
This paper tries to estimate the absorption coefficient of the lightning coaxial unification fractal model (CUFM) from the particle point of view. Firstly, the lightning channel ionization and dissociation transitions have been studied. Secondly, by the Braginskii formula and the velocity current fractal relationship, the object function of the kappa coefficient and core radius is established. Finally, the numerical simulation of the absorption coefficients is accomplished by optimizing and minimizing the object function. It is found that the kappa outcomes are basically consistent with the past CUFM adopted method.
{"title":"The estimation of absorption coefficient of the lightning coaxial unification fractal model from the particle point of view","authors":"Nan Wang","doi":"10.1109/CEEM.2015.7368709","DOIUrl":"https://doi.org/10.1109/CEEM.2015.7368709","url":null,"abstract":"This paper tries to estimate the absorption coefficient of the lightning coaxial unification fractal model (CUFM) from the particle point of view. Firstly, the lightning channel ionization and dissociation transitions have been studied. Secondly, by the Braginskii formula and the velocity current fractal relationship, the object function of the kappa coefficient and core radius is established. Finally, the numerical simulation of the absorption coefficients is accomplished by optimizing and minimizing the object function. It is found that the kappa outcomes are basically consistent with the past CUFM adopted method.","PeriodicalId":442379,"journal":{"name":"2015 7th Asia-Pacific Conference on Environmental Electromagnetics (CEEM)","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126343103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-11-01DOI: 10.1109/CEEM.2015.7368616
Y. Parfenov, B. Titov, L. Zdoukhov, W. Radasky
We have considered some shortcomings of the standard way of the assessment of electronic device immunity to high power EMPs. And we offer a way, which is based on the use of key parameters of pulse electric disturbances induced in circuits of equipment. This way allows assessing the dependence of results of testing electronic devices from the degree of conformity of EMPs in test volumes of simulators to typical EMPs, but also from degree of conformity of EMPs formed by simulators to real EMPs.
{"title":"About the assessment of electronic device immunity to high power electromagnetic pulses","authors":"Y. Parfenov, B. Titov, L. Zdoukhov, W. Radasky","doi":"10.1109/CEEM.2015.7368616","DOIUrl":"https://doi.org/10.1109/CEEM.2015.7368616","url":null,"abstract":"We have considered some shortcomings of the standard way of the assessment of electronic device immunity to high power EMPs. And we offer a way, which is based on the use of key parameters of pulse electric disturbances induced in circuits of equipment. This way allows assessing the dependence of results of testing electronic devices from the degree of conformity of EMPs in test volumes of simulators to typical EMPs, but also from degree of conformity of EMPs formed by simulators to real EMPs.","PeriodicalId":442379,"journal":{"name":"2015 7th Asia-Pacific Conference on Environmental Electromagnetics (CEEM)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115033653","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-11-01DOI: 10.1109/CEEM.2015.7368688
Yang Jun Tang, Xu Wei Dong, Wei Jian Shuai, Cui Guang Zhen
Smoke emission is an important means to generate quick and wide-range camouflage, in this paper, smoke effect sequence diagrams and effective shielding area were acquired, the formula of M-T was fitted which based on the model of spatial relation between single smoke equipment and detector. The digital image analysis method of dynamic testing of smoke shielding effect was constructed. The dynamic and diffusion characteristics of single smoke equipment was researched. According to the experiment, the variation relationship of smoke area and time was definited, a new testing method of shielding effect of single smoke equipment was formed preliminarily. It laid the theoretical foundation for the shielding effect of multiple smoke equipments and different smoke equipment.
{"title":"A new testing method of shielding effect of single smoke equipment","authors":"Yang Jun Tang, Xu Wei Dong, Wei Jian Shuai, Cui Guang Zhen","doi":"10.1109/CEEM.2015.7368688","DOIUrl":"https://doi.org/10.1109/CEEM.2015.7368688","url":null,"abstract":"Smoke emission is an important means to generate quick and wide-range camouflage, in this paper, smoke effect sequence diagrams and effective shielding area were acquired, the formula of M-T was fitted which based on the model of spatial relation between single smoke equipment and detector. The digital image analysis method of dynamic testing of smoke shielding effect was constructed. The dynamic and diffusion characteristics of single smoke equipment was researched. According to the experiment, the variation relationship of smoke area and time was definited, a new testing method of shielding effect of single smoke equipment was formed preliminarily. It laid the theoretical foundation for the shielding effect of multiple smoke equipments and different smoke equipment.","PeriodicalId":442379,"journal":{"name":"2015 7th Asia-Pacific Conference on Environmental Electromagnetics (CEEM)","volume":"174 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124253109","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-11-01DOI: 10.1109/CEEM.2015.7368715
Shaoqing Zhang, Minghao Wang, Xuemai Gu
The lightning current will radiate electromagnetic pulse field (LEMP) when striking tall building. And it could induce high current in cables or equipments near the building. But for huge amount of calculation and storage space, the issued researches on lightning electromagnetic fields in striking tall building are confined to the discrete points near the ground. In this paper, the LEMP on every grid of the whole space were calculated with Processing window FDTD method (PWFDTD), which avoids the huge amount of storage when computing the distribution of lightning electromagnetic field in large range. The spatial attribute of LEMP characteristic parameters were obtained. These distribution plots is important for the protection and evaluation of LEMP near the tall building, especially for the building in urban area.
{"title":"Characteristics of vicinal pulse electromagnetic field for lightning stroke to tall building","authors":"Shaoqing Zhang, Minghao Wang, Xuemai Gu","doi":"10.1109/CEEM.2015.7368715","DOIUrl":"https://doi.org/10.1109/CEEM.2015.7368715","url":null,"abstract":"The lightning current will radiate electromagnetic pulse field (LEMP) when striking tall building. And it could induce high current in cables or equipments near the building. But for huge amount of calculation and storage space, the issued researches on lightning electromagnetic fields in striking tall building are confined to the discrete points near the ground. In this paper, the LEMP on every grid of the whole space were calculated with Processing window FDTD method (PWFDTD), which avoids the huge amount of storage when computing the distribution of lightning electromagnetic field in large range. The spatial attribute of LEMP characteristic parameters were obtained. These distribution plots is important for the protection and evaluation of LEMP near the tall building, especially for the building in urban area.","PeriodicalId":442379,"journal":{"name":"2015 7th Asia-Pacific Conference on Environmental Electromagnetics (CEEM)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124388590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-11-01DOI: 10.1109/CEEM.2015.7368679
F. Zhao, Qiu Yunfeng, Chen Huining, Xiao Wenjun, Ruan Fangming, Tomasz Dloguzs, Zhang Chao, L. Xiaoxiao, Y. Xiaohong, Z. Junhua, You Xiaojin, Jiang Yuanyuan, Gong Boxiang
Based on requirement of new invented ESD measurement system, detection design of humidity-controlled was proposed. Small gap electrostatic discharge (ESD) is greatly affected by factors of electrode moving speed and humidity and results in discrete characteristic of discharge parameters. Humidity test system design was given based on the STM32 in a sealed box with smart control PID algorithm. The design may promote investigation on the measurement system of multiple factor effect on discharge parameters, obtained a more convenience humidity control system.
{"title":"Humidity detecting system design for new measurement system of electrostatic discharge","authors":"F. Zhao, Qiu Yunfeng, Chen Huining, Xiao Wenjun, Ruan Fangming, Tomasz Dloguzs, Zhang Chao, L. Xiaoxiao, Y. Xiaohong, Z. Junhua, You Xiaojin, Jiang Yuanyuan, Gong Boxiang","doi":"10.1109/CEEM.2015.7368679","DOIUrl":"https://doi.org/10.1109/CEEM.2015.7368679","url":null,"abstract":"Based on requirement of new invented ESD measurement system, detection design of humidity-controlled was proposed. Small gap electrostatic discharge (ESD) is greatly affected by factors of electrode moving speed and humidity and results in discrete characteristic of discharge parameters. Humidity test system design was given based on the STM32 in a sealed box with smart control PID algorithm. The design may promote investigation on the measurement system of multiple factor effect on discharge parameters, obtained a more convenience humidity control system.","PeriodicalId":442379,"journal":{"name":"2015 7th Asia-Pacific Conference on Environmental Electromagnetics (CEEM)","volume":"82 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129367906","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-11-01DOI: 10.1109/CEEM.2015.7368712
Yu-nan Han, Jun-chao She, Zheng-lin Wen, D. Pommerenke, Lin Dai
Human body potential caused by walking on floors has been modeled by a RC equivalent circuit. Based on the measurement of the charging voltage by human body walking, the RC equivalent model has been deduced and the influence of the parameters on the human bod voltage has also been analyzed. The human body equivalent circuit corresponds with the RC network. As a consequence, an exponential function can be obtained to describe the walking voltage. The model of human body voltage charging by walking combines two main processes: an exponential increase of human body potential due to charging by the soles repeatedly detaching from the floor during walking, and for discharging, the human body potential has an exponential retention. The time constant is determined as a series combination of body resistance and capacitance relative to the ground. During the walking process, the periodic changes of walking paces cause the periodic changes of the body capacitance to ground, then the human walking voltage can be determined by the capacitance. The walking voltage modeled has reached agreement with experimental data.
{"title":"Modeling human body walking voltage by human body capacitance","authors":"Yu-nan Han, Jun-chao She, Zheng-lin Wen, D. Pommerenke, Lin Dai","doi":"10.1109/CEEM.2015.7368712","DOIUrl":"https://doi.org/10.1109/CEEM.2015.7368712","url":null,"abstract":"Human body potential caused by walking on floors has been modeled by a RC equivalent circuit. Based on the measurement of the charging voltage by human body walking, the RC equivalent model has been deduced and the influence of the parameters on the human bod voltage has also been analyzed. The human body equivalent circuit corresponds with the RC network. As a consequence, an exponential function can be obtained to describe the walking voltage. The model of human body voltage charging by walking combines two main processes: an exponential increase of human body potential due to charging by the soles repeatedly detaching from the floor during walking, and for discharging, the human body potential has an exponential retention. The time constant is determined as a series combination of body resistance and capacitance relative to the ground. During the walking process, the periodic changes of walking paces cause the periodic changes of the body capacitance to ground, then the human walking voltage can be determined by the capacitance. The walking voltage modeled has reached agreement with experimental data.","PeriodicalId":442379,"journal":{"name":"2015 7th Asia-Pacific Conference on Environmental Electromagnetics (CEEM)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115292772","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-11-01DOI: 10.1109/CEEM.2015.7368660
Si Qing, Shi Lihua, Zhou Yinghui, Wang Tao, H. Zhengyu, Xiang Lei
The impedance boundary network condition (INBC) is widely used build parametric model of thin materials, fine mesh subdivision in finite difference time domain (FDTD) method can be avoided and the computational efficiency can be greatly improved. This paper proposes the z model method to describe the relations between the input and output in discrete time domain which have the relations between different equations and 1st-order rational fraction rational fraction. This modified calculation method could avoid complex convolutions and obtain exact results when the conductivity is low on the premise of the extractive estimation of z model. Example of a 3-D cavity containing a thin conductive layer on its bottom surface are used to prove the effectiveness of the proposed method.
{"title":"Application of z model in FDTD analysis of multi-layer conductivity slabs","authors":"Si Qing, Shi Lihua, Zhou Yinghui, Wang Tao, H. Zhengyu, Xiang Lei","doi":"10.1109/CEEM.2015.7368660","DOIUrl":"https://doi.org/10.1109/CEEM.2015.7368660","url":null,"abstract":"The impedance boundary network condition (INBC) is widely used build parametric model of thin materials, fine mesh subdivision in finite difference time domain (FDTD) method can be avoided and the computational efficiency can be greatly improved. This paper proposes the z model method to describe the relations between the input and output in discrete time domain which have the relations between different equations and 1st-order rational fraction rational fraction. This modified calculation method could avoid complex convolutions and obtain exact results when the conductivity is low on the premise of the extractive estimation of z model. Example of a 3-D cavity containing a thin conductive layer on its bottom surface are used to prove the effectiveness of the proposed method.","PeriodicalId":442379,"journal":{"name":"2015 7th Asia-Pacific Conference on Environmental Electromagnetics (CEEM)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122177491","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-11-01DOI: 10.1109/CEEM.2015.7368710
Kenichro Abe, K. Kawamata, S. Minegishi, O. Fujiwara
Impulsive electromagnetic noise is caused by ESD. Especially, micro gap discharge of less than 1kV produces GHz band width electromagnetic noise. It is thought ESD noise has possibility that affects to various electrical systems. To solve EMC problems, we elucidated a mechanism which ESD noise occurs. We found out the amplitude of electromagnetic noise depended on the size of electrode and applied voltage of the electrode in a previous study. Therefore, we mainly measured the amplitude of electromagnetic noise when we changed the approach speed of electrode by this experiment. Then, the average amplitude and the dispersion of the amplitude tended to increase with the approach speed became fast. On the other hand, the difference between the intermediate value of the amplitude and the average value tended to decrease with the approach speed of electrode became fast. Furthermore, we discovered these changes make logarithmic change by approximating them.
{"title":"Influence of electrode approach speed in variation characteristics of the impulsive ESD noise","authors":"Kenichro Abe, K. Kawamata, S. Minegishi, O. Fujiwara","doi":"10.1109/CEEM.2015.7368710","DOIUrl":"https://doi.org/10.1109/CEEM.2015.7368710","url":null,"abstract":"Impulsive electromagnetic noise is caused by ESD. Especially, micro gap discharge of less than 1kV produces GHz band width electromagnetic noise. It is thought ESD noise has possibility that affects to various electrical systems. To solve EMC problems, we elucidated a mechanism which ESD noise occurs. We found out the amplitude of electromagnetic noise depended on the size of electrode and applied voltage of the electrode in a previous study. Therefore, we mainly measured the amplitude of electromagnetic noise when we changed the approach speed of electrode by this experiment. Then, the average amplitude and the dispersion of the amplitude tended to increase with the approach speed became fast. On the other hand, the difference between the intermediate value of the amplitude and the average value tended to decrease with the approach speed of electrode became fast. Furthermore, we discovered these changes make logarithmic change by approximating them.","PeriodicalId":442379,"journal":{"name":"2015 7th Asia-Pacific Conference on Environmental Electromagnetics (CEEM)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122410991","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-11-01DOI: 10.1109/CEEM.2015.7368692
He Wei, Shi Lihua, Xu Qiwei, Liu Feng
In this work, a curve-fitting method is introduced to estimate the frequency dependent dielectric constants from experiment data of permittivity, then a transmission model of rebar embedded concrete is given. By using the vector fitting (VF) method, the shielding effectiveness (SE) of rebar embedded concrete in time domain can be obtained, then simulations of SE to UWB and HPM are given. From the simulation results, we can draw the conclusion that the narrower the pulse width of UWB and the higher the carrier frequency of HPM, the better shielding effectiveness.
{"title":"Shielding effectiveness estimation for concrete slabs based on measured frequency dependent dielectric constant","authors":"He Wei, Shi Lihua, Xu Qiwei, Liu Feng","doi":"10.1109/CEEM.2015.7368692","DOIUrl":"https://doi.org/10.1109/CEEM.2015.7368692","url":null,"abstract":"In this work, a curve-fitting method is introduced to estimate the frequency dependent dielectric constants from experiment data of permittivity, then a transmission model of rebar embedded concrete is given. By using the vector fitting (VF) method, the shielding effectiveness (SE) of rebar embedded concrete in time domain can be obtained, then simulations of SE to UWB and HPM are given. From the simulation results, we can draw the conclusion that the narrower the pulse width of UWB and the higher the carrier frequency of HPM, the better shielding effectiveness.","PeriodicalId":442379,"journal":{"name":"2015 7th Asia-Pacific Conference on Environmental Electromagnetics (CEEM)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128399800","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-11-01DOI: 10.1109/CEEM.2015.7368717
Kejie Li, Shao-fei Wang, Di Wang, Zhaoyang Wang, Yan-zhao Xie
There has been many researches[1] on EMP effects caused by kinds of incident waveforms, and statistical methods were involved on very early time to assist the analysis of effect data and results. Instand of studying the whole process and mechanics directly, this paper built up a black-box model for EMP effects evaluation based on threshold probability and logistic regression. Experiments had been done to get the effect data, with which the incident waveform characteristics were drawn and compared. The result showed that several characteristics had more correlation with effect results than others.
{"title":"EMP effects statistical analysis based on incident waveform characteristics","authors":"Kejie Li, Shao-fei Wang, Di Wang, Zhaoyang Wang, Yan-zhao Xie","doi":"10.1109/CEEM.2015.7368717","DOIUrl":"https://doi.org/10.1109/CEEM.2015.7368717","url":null,"abstract":"There has been many researches[1] on EMP effects caused by kinds of incident waveforms, and statistical methods were involved on very early time to assist the analysis of effect data and results. Instand of studying the whole process and mechanics directly, this paper built up a black-box model for EMP effects evaluation based on threshold probability and logistic regression. Experiments had been done to get the effect data, with which the incident waveform characteristics were drawn and compared. The result showed that several characteristics had more correlation with effect results than others.","PeriodicalId":442379,"journal":{"name":"2015 7th Asia-Pacific Conference on Environmental Electromagnetics (CEEM)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114402263","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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