scholarly journals Calculation of electric field in wire penetration monitoring device on strong electromagnetic environment

2020 ◽  
Vol 617 ◽  
pp. 012018
Author(s):  
Jianhong Hao ◽  
Yuguan Zhang ◽  
Haipeng Shi ◽  
Lianguang Liu
Keyword(s):  
Electric Field ◽  
Monitoring Device ◽  
Electromagnetic Environment

MONITORING SYSTEM TO ENSURE THE ELECTROMAGNETIC SAFETY OF HOUSEHOLD OBJECTS

2020 ◽  
Author(s):  
Е.В. ТИТОВ
Keyword(s):  
Electromagnetic Field ◽  
Field Strength ◽  
Electric Field ◽  
Electromagnetic Radiation ◽  
Electromagnetic Fields ◽  
Personal Computer ◽  
Experimental Studies ◽  
Electromagnetic Environment ◽  
Stay Time ◽  
Computer Monitors

Предложен метод формирования картин опасности электромагнитных излучений в ограниченном пространстве с источниками электромагнитных полей по критерию допустимого времени пребывания людей. Представлены результаты экспериментальных исследований опасности электромагнитного поля от мониторов персональных компьютеров, оптических манипуляторов типа «мышь» и многофункциональных устройств типа «принтер-копир-сканер». Приведены компьютерные модели электромагнитной обстановки в виде картин распределения напряженности электрического поля на частоте 30 кГц, а также в виде картин опасности электромагнитных излучений по критерию допустимого времени. It is proposed the method of forming pictures of the danger of electromagnetic radiation in a limited space with sources of electromagnetic fields according to the criterion of the allowable stay time. The article shows the results of experimental studies of the electromagnetic field from personal computer monitors, optical mice, and multifunctional devices printer-copier-scanner. Computer models of the electromagnetic environment are presented in the form of pictures of the distribution of the electric field strength at a frequency of 30 kHz

Spatial Distribution and Pollution Risk Analysis of Electromagnetic Radiation in Changchun City

2012 ◽  
Vol 610-613 ◽  
pp. 733-738 ◽  
Author(s):  
Yan Wei Gao ◽  
Hong Liang Zhu
Keyword(s):  
Field Strength ◽  
Electric Field ◽  
Electromagnetic Radiation ◽  
Ordinary Kriging ◽  
Monitoring Station ◽  
Kriging Method ◽  
Electromagnetic Environment ◽  
Pollution Risk ◽  
Changchun City ◽  
Electromagnetic Pollution

To evaluate the electromagnetic radiation pollution in Changchun City and determine the risk of pollution, the probability theory of extreme value distribution is used to build the computational model of electromagnetic pollution risk and discusses their property according to situation that the current urban growth of electromagnetic energy mainly comes from mobile base stations and radio frequency radiation sources. According to the integrated electric field intensity which monitored from Changchun City’s 442 monitoring station by electromagnetic environment monitoring station in Jilin Province, the risk of electromagnetic pollution in Changchun City probability is calculated, ordinary Kriging method is used to draw the map of Changchun City electromagnetic radiation field strength and calculates electromagnetic pollution risk probability. The result indicates that the electromagnetic environment is safe. The value of electric field strength in the office area is higher than other regions. The map drawing by fuzzy Kriging method is more accurately than the map drawing by ordinary Kriging method.

The Electromagnetic Environmental Impact of High-Voltage Transmission Line and its Prevention Methods

2013 ◽  
Vol 726-731 ◽  
pp. 4013-4016
Author(s):  
Jian Zhao Qi ◽  
Jun Guo
Keyword(s):  
Electric Field ◽  
Transmission Line ◽  
Field Intensity ◽  
Transmission Lines ◽  
Electric Field Intensity ◽  
Parameters Optimization ◽  
Electromagnetic Environment ◽  
Minimal Impact ◽  
Phase Sequence ◽  
Frequency Electric Field

This paper calculates frequency electric field intensity by the equivalent charge method, and analyzes the main factors affecting the electromagnetic environment of the 500kV Double Circuit Transmission Lines. In the same electromagnetic transmission line calculation parameters, optimization of phase sequence can effectively reduce the frequency electric field intensity; with the increase of the distance, the line frequency electric field intensity significantly reduces away from the center line within 25m. Finally, the paper obtains the phase sequence arrangement with minimal impact on the electromagnetic environment and the minimum ground clearance meeting the environmental requirements.

Modeling and Simulation of Helicopter Cabin Electromagnetic Environment

2011 ◽  
Vol 383-390 ◽  
pp. 5615-5620
Author(s):  
Liu Yang ◽  
Yun Feng Jia ◽  
Dong Lin Su
Keyword(s):  
Integral Equation ◽  
Electric Field ◽  
Electromagnetic Compatibility ◽  
Fast Multipole Method ◽  
Original Model ◽  
Preliminary Design ◽  
Electromagnetic Environment ◽  
Simulation Results ◽  
Field Integral ◽  
Computing Speed

Electromagnetic environment (EME) in helicopter cabin is one of the most important indexes for electromagnetic compatibility (EMC) on airborne platform. The simulation results were not accurate enough because of the difficulties in accurately modeling and the large computation. Due to the inaccuracy of the former modeling method which used the typical geometric, the professional software ICEMCFD/AI*Environment (AIE) was employed to restore the helicopter’s original model, based on the obtain of the accurate helicopter model, the Multi-layer Fast Multipole Method (MLFMM) and Combined Field Integral Equation (CFIE) were employed to analyze the variation of the electric field in the helicopter cabin versus the frequency and other factors with a VHF antenna mounted on the helicopter. Both accuracy and computing speed were concerned, the results have some guidance significance to the EMC preliminary design on airborne platform.

Experiment Study and Design of Measurement System of the Total Electrical Field on the Ground Level under HVDC Transmission Lines

2011 ◽  
Vol 128-129 ◽  
pp. 1452-1455 ◽  
Author(s):  
Xin Rui Zhao ◽  
Tie Bing Lu ◽  
Yu Hong Dong
Keyword(s):  
Electric Field ◽  
Measurement System ◽  
Transmission Lines ◽  
Virtual Instrument ◽  
Ground Level ◽  
Electromagnetic Environment ◽  
Hvdc Transmission ◽  
Hvdc Transmission Lines ◽  
Total Electric Field ◽  
Made In

Based on the technology of virtual instrument, a set of measurement system of the total electric field on the ground level under HVDC transmission lines is developed. After the hardware and software system are built up, some tests are made in laboratory to show the validity of the system. Finally, experiment results are given and analyzed. The developed measurement system can be used to measure the total electric field on the ground level under HVDC transmission lines, and can provide support for the evaluation of the electromagnetic environment of the HVDC transmission lines.

Measurement and Analysis of the Power Frequency Electric Field under 500kV Transmission Lines

2013 ◽  
Vol 722 ◽  
pp. 131-134
Author(s):  
Yan Zhou Sun ◽  
Xiao Yan Song ◽  
Chen Hui Wang
Keyword(s):  
Electric Field ◽  
Transmission Line ◽  
Transmission Lines ◽  
Simulation Software ◽  
Matlab Simulation ◽  
Electromagnetic Environment ◽  
Protection Measures ◽  
Power Frequency ◽  
Frequency Electric Field ◽  
Extra High Voltage

The power frequency electric field of the extra high voltage network, as an index which has an important effect on the ecological environment around has been valued by the power design and operate department. Studying the factors that affect electromagnetic environment of transmission line and protective measures can provide technical basis for the design of the transmission line, and make people to recognize the electromagnetic environment of transmission lines correctly and select the rational protection measures. In this paper, firstly the physical model of overhead transmission lines was built and the electric field was calculated, then the actual electric field under 500 kV transmission line in Jiaozuo was measured using the electromagnetic analyzer PMM8053B, finally the correctness of the theory and model was verified using the MATLAB simulation software.

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