短暂电磁干扰统计参数测量系统

介绍一种用于测量短暂电磁干扰统计参数的测量系统.该系统主要山干扰测量仪、模数转换板和微机等组成.该系统可在国际无线电干扰特别委员会规定的 A 和 B 频段上同时测量干扰的幅度概率分布和平均穿越率,系统测量的动态范围是60dB,可连续测量20次,两次连续测量的时间间隔小于1ms,并根据幅度分布测量结果计算出准峰值、平均值、有效值.校验结果表明该系统工作正常,已用于电气化铁路电磁干扰测量,文中还给出了有关测量结果.

The System for Measurement of Statistical Parameters of Transient Pulse Interference

The parer introduces a measurement system for statistical parameters of transient EMI.The system mainly consists of an EMI test receiver,an analog to digital convert board and a PC computer.The system can simultaneously meas- ure the amplitude distribution and crossing rate distribution of EMI in CISPR A,B band.The dynamic range of the system is 60 dB.It has a consecutive measurement function which is specially designed for measuring transient EMI. The maximum measurement times is 20 and the period between two consecutive measurement is 1 ms.The measurement results are expressed in APD,CRD or RMS,AV,and Quasi-Peak value which are calculated by a software.Calculation shows that the system works well.The paper presented some APD and CRD data for electrified railway interference measured with the system.