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首页> 外文期刊>International Journal of Environmental Research and Public Health >Characterization of Extremely Low Frequency Magnetic Fields from Diesel, Gasoline and Hybrid Cars under Controlled Conditions
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Characterization of Extremely Low Frequency Magnetic Fields from Diesel, Gasoline and Hybrid Cars under Controlled Conditions

机译：受控条件下柴油，汽油和混合动力汽车的极低频磁场的表征

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This study characterizes extremely low frequency (ELF) magnetic field (MF) levels in 10 car models. Extensive measurements were conducted in three diesel, four gasoline, and three hybrid cars, under similar controlled conditions and negligible background fields. Averaged over all four seats under various driving scenarios the fields were lowest in diesel cars (0.02 μT), higher for gasoline (0.04–0.05 μT) and highest in hybrids (0.06–0.09 μT), but all were in-line with daily exposures from other sources. Hybrid cars had the highest mean and 95th percentile MF levels, and an especially large percentage of measurements above 0.2 μT. These parameters were also higher for moving conditions compared to standing while idling or revving at 2500 RPM and higher still at 80 km/h compared to 40 km/h. Fields in non-hybrid cars were higher at the front seats, while in hybrid cars they were higher at the back seats, particularly the back right seat where 16%–69% of measurements were greater than 0.2 μT. As our results do not include low frequency fields (below 30 Hz) that might be generated by tire rotation, we suggest that net currents flowing through the cars’ metallic chassis may be a possible source of MF. Larger surveys in standardized and well-described settings should be conducted with different types of vehicles and with spectral analysis of fields including lower frequencies due to magnetization of tires.
机译：这项研究表征了10种汽车模型中的极低频（ELF）磁场（MF）水平。在类似的受控条件和可忽略的背景范围内，在3辆柴油，4辆汽油和3辆混合动力汽车中进行了广泛的测量。在各种驾驶情景下，所有四个座位的平均值均在柴油车中最低（0.02μT），在汽油中更高（0.04-0.05μT），在混合动力车中最高（0.06-0.09μT），但所有领域均与日照线一致从其他来源。混合动力汽车具有最高的平均水平和95％的MF水平，尤其是在0.2μT以上的测量中，比例尤其高。与在2500 RPM时空转或空转时站立不动相比，这些参数在移动条件下也更高，而在40 km / h时仍以80 km / h更高。非混合动力车的前排座椅的磁场较高，而混合动力车的后排座椅的磁场较高，尤其是右后排座椅的磁场更高，其中16％–69％的测量值大于0.2μT。由于我们的结果不包括轮胎旋转可能产生的低频场（低于30 Hz），因此我们建议流过汽车金属底盘的净电流可​​能是MF的来源。在标准和描述良好的环境中，应使用不同类型的车辆进行大范围的调查，并且应对包括由于轮胎磁化而导致的低频在内的磁场进行频谱分析。

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