全国静电指数地图发布 教你避免“噼里啪啦”的尴尬|亚洲日韩精品一区二区三区
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近期我国大部地区雨雪稀少,天气干燥,多地静电活跃,来看看未来三天哪些地方静电最活跃。
我国大部天气干燥易起静电
超15省份“噼里啪啦”风险高
天干物燥易起静电,今起三天,我国依旧雨雪稀少,不仅北方,江南、华南多地也将经历同期少见的干燥天气。从全国静电指数地图可以看出,11月20日至22日,我国大部地区静电指数较高,京津冀等超15个省区市均处于静电活跃区域。
其中今天,我国大部地区天气干燥,静电活跃的范围广泛,尤其是西北地区大部、内蒙古中西部、辽宁、京津冀、山西、西藏大部等地相对湿度在30%以下,静电风险高。山东、江苏、安徽、湖北以及长江以南大部地区都属于静电潜伏区域。
静电从哪里来?
秋冬易起静电皆因干燥
静电并不是人体产生的,而是人在活动时因摩擦而产生的,在空气干燥的情况下更容易产生。冬日空气湿度迅速降低,当环境湿度小于30%的情况下,空气中的水汽难以传导电荷,原本容易消散的静电会大量停留在物体或人体表面,门把手、楼梯扶手、毛衣、头发等似乎处处带电。

静电电压可达数千伏
但一般不会伤害人体
静电电压可高达数千伏!当静电电压达到2000伏时,手指就有感觉了;超过3000伏时就有火花出现,手指会有针刺似的痛感;超过7000伏时,人就有被电击感。虽然静电的电压看起来高,但由于摩擦起电的时间极短,所产生的电流量也很小,因而一般不会对人体造成危险。

降低静电风险
总的原则是“防”和“放”
防范“被电”,需要做好两点。首先是源头上“避免积累过多静电”,比如增加空气湿度,做好皮肤保湿,选择不易起静电材质的面料。羊毛衫、羽绒服、摇粒绒外套等大多为易产生静电材质,如果想避免静电,可以多穿棉质衣物。

第二是“及时转移所积累静电”,比如可以通过摸墙来“放电”,将静电电荷通过墙体导入地面。此外,还可用金属小物件给可能带电的物品放电,降低触碰风险。
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