中文摘要：

阐述如何对亚微秒级的闪电电磁场变化波形进行同步采集。设计制作了量程可调的快、慢电场变化观测系统，用以获取闪电电场变化信息，并结合磁场同步资料实现了不同环境下的闪电观测要求。基于数据采集卡（PCI-5105）和Labwindows/CVI开发平台，研制了闪电波形同步数据采集系统和分析处理软件。整套系统具有高采样率、大容量、多参量、同步观测等特点，并已通过野外试验的验证，为研究闪电放电的微物理过程提供了探测手段。

英文摘要：

The synchronous observation of submicrosecond electromagnetic changes resulted from lightning is described. A newtype fast/slow rangeadjustable measuring system of electric field changes is developed. The equipment can be used to observe lighting in different environments in combination with magnetic measuring devices. The software of the system based on Labwindows/CVI with the PCI5105 card is discussed. The main advantages of this system include high sampling rate, high capacity, multiple parameters, and synchronous measurement. This system was used to observe lighting flashes and analyze lightning physical processes in a field experiment.