摘要
本文应用生物控制论的原理和方法,对27名接触间断型直流磁场工人的诱发脑电图进行计算机分析。分析指标有功率谱、传递函数、相干函数和脉冲响应。工人作业时,手部最大场强约为75～150奥,胸腹部最大场强约为12～54奥,磁铁中心最大场强约为350～1000奥。结果表明:低强度间断型直流磁场的职业性暴露对工人的诱发脑电图未见有明显影响。
A computer analysis of the visuallyevoked responses of EEG of 27workers exposed to intermittentconstant magnetic fields was conductedwith the application of biocyberneticalprinciples and methods,The analysisindicators include power spectrum.transfer function,coherence functionand impulse response.When the work-ings operated.the biggest fieldintensity was probably 75 to 150 Oeon the hands,12 to 54 Oe on the chestand abdomen.and 300 to 1000 Oe at thecentre of magnets.No apparent effectson the visually evoked responses ofEEG of workers were discovered whenthey were occupationally exposed to thelow intensity intermittent constant mag-netic fields.
