Regardings of the urban electromagnetic environment in the electromagnetic interference analysis of automobiles. / Considerações do ambiente eletromagnético urbano na análise de interferências em veículos automotores.

AUTOR(ES)

Gláucio Santos

DATA DE PUBLICAÇÃO

2002

RESUMO

Facing the dependency and diversity of applications of the on-board electronics in the modern vehicles and taking into account their immunity level as well as the vari-ety of electromagnetic (EM) phenomena at the present time in the cities, the analysis of the influences from the urban electromagnetic environment have to be stressed in the electromagnetic compatibility (EMC) studies of those devices. Based on this picture and due to the mobility characteristics of the automobiles, this work emphasises the importance of the influences of EM environment of the urban areas in the methodology for EMC analysis of automobiles and its electronics equip-ment. Thus, the typical environment was defined as the one related to the main urban areas in Brazil, emphasising those located in São Paulo State and taking into considera-tion the intensity and variety of the EM sources. Results of many practical measurements, including those resultants of regions with high density of population, with commercial and industrial activities, closer to transmission lines and into substations, near to TV and radio broadcasting antennas, cellular radio base stations, airports, etc. The presented results embrace the main EM events that are capable to cause disturbances in the on-board electronics. These data enables a comparison of the brazilian EM environmental conditions with the analyses already performed in other Countries. By the way, the presented results are taken as useful for establishing, improving and adjusting the methodologies and regulations of EMC procedures that are applicable for the automotive industries in Brazil. A critical analysis of those results is presented as well as some recommendations related to the EMC analysis of the on-board devices.

ASSUNTO(S)

ambiente interferência eletromagnética environmental electromagnetic electromagnetic interference automotiva eletromagnético automotive

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