Exposure of workers to the electromagnetic field of a RF welding machine
Résumé
Radio-frequency welding machines generate a high electromagnetic field. Workers using such appliances are daily exposed to this field, thus it is important to quantify their exposure. We performed measurements on a real device, and found that the radiated field is composed of several frequencies spanning from 27 MHz to 108 MHz. The effect of human tissues dielectric parameters on the external electromagnetic field is quantified numerically. We found that the field is strongly modified by the presence of the body, but the values of dielectric parameters of tissues have a little influence on the external electric field, as long as they have the same order of magnitude.
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