人们在脱化纤织物衣服时,常听到“劈劈叭叭”的声音,在暗处还能看到火花,这就是静电放电现象,静电放电在生产及生活中的危害已经逐步为人们所认识。据日本上世纪60年代资料统计,平均每年发生的静电火灾达100起,其中由于服装带电引起的占20%左右。在日常生活中,能产生静电的物体除化纤衣物外,还有地毯、塑料用具、家具油漆表面和某些家用电器。家用电器中的静电轻则造成易吸尘和产生噪声等小毛病,重则影响人体健康、甚至危及人身安全。一些半导体收音机在使用一段时间后,出现劈叭响的噪音,其特点是仅仅在调谐选台旋纽的时候发生。产生噪声的原因是:机内密封双连可变电容器的动 When people take off fiber fabric clothes, they often hear the sound of “split trumpets” and can see sparks in the dark. This is the phenomenon of electrostatic discharge. The harm of electrostatic discharge in production and life has gradually been brought to people Recognized. According to statistics from the 1960s in Japan, an average of 100 static electric fires occur each year, of which about 20% is caused by clothing charging. In everyday life, objects that generate static electricity include, in addition to chemical fiber clothing, carpets, plastic utensils, furniture paint surfaces, and certain household appliances. The static electricity in the household appliances causes the minor problems such as easy to vacuum dust and noise, but also affects human health and even endanger personal safety. Some semiconductor radios, after being used for a period of time, have a trumpet noise and are characterized only by tuning knobs. The reason for the noise is: the machine sealed dual variable capacitors move