Florig H K, Hoburg J F
Department of Engineering and Public Policy, Carnegie Mellon University, Pittsburgh, PA 15213.
Health Phys. 1990 Apr;58(4):493-502. doi: 10.1097/00004032-199004000-00012.
Power-frequency (50/60 Hz) magnetic fields produced by electric blankets are estimated from data on blanket design using a three-dimensional computer model. Maximum, minimum, and volume-average fields within human forms are presented as a function of blanket type and a number of geometric factors including body size, body-blanket separation, and lateral body position. When blankets are heating, typical flux densities range from a few tenths of microtesla (microT) on the side of the body farthest from the blanket up to a few tens of microtesla on the side closest to the blanket. Superposition results in local minima within the body that approach zero field intensity. Across the blanket-using population, flux densities averaged over the whole body range from 1.5-3.3 microT with typical values of 2.2 microT.
利用三维计算机模型，根据电热毯设计数据估算出电热毯产生的工频（50/60赫兹）磁场。人体模型内的最大、最小和体积平均磁场表示为毯子类型以及包括身体尺寸、身体与毯子的间距和身体侧向位置在内的一些几何因素的函数。当毯子加热时，典型的磁通密度范围从身体离毯子最远一侧的几十分之一微特斯拉（μT）到最靠近毯子一侧的几十微特斯拉。叠加导致人体内部出现接近零场强的局部最小值。在使用电热毯的人群中，全身平均磁通密度范围为1.5 - 3.3微特斯拉，典型值为2.2微特斯拉。
