摘要
在10m法暗室内,对汽车的全LED前组合灯进行了整车和部件在窄带辐射电磁干扰下的测试。结果表明,在频率20—220MHz范围内,LED照度随场强增加而衰减,整车测试的照度衰减大于部件测试的照度衰减;不同车灯的激亮频率和阈值不同,部件测试的激亮阈值大于整车测试。根据测试结果,建议对LED车灯采取窄带辐射抗干扰措施,以免引发错误信号,而对于LED车灯窄带辐射抗扰测试,采用整车测试比部件测试更合理。
The full LED front combination lamps are tested both in vehicle and as component alone in a 10- meter semi-anechoic chamber under a narrowband radiated electromagnetic interference. The results show that in a frequency range of 20-220MHz, LED illuminance reduces with the increase of electric field intensity, and the reduc- tion in illuminance in vehicle test is Xarger than that in component test. Different LED lamps have different lit fre- quencies and thresholds, and the lit thresholds in component test are higher than that in vehicle test. Based on test results, it is suggested that measures for the anti-interference of narrow-band radiation should be taken for automo- tive LED lamps to avoid false signals, and for narrowband radiated electromagnetic interference tests, vehicle test is preferable to component one.
出处
《汽车工程》
EI
CSCD
北大核心
2015年第4期456-459,共4页
Automotive Engineering
基金
国家质检总局科技项目(T2012-SHQTS-0023)资助
关键词
LED车灯
窄带辐射
电磁干扰
automotive LED lights
narrowband radiation
EMI