摘要
通过捕获闪电放电的瞬态模拟信号,经预置触发电平窗口控制,形成一个宽度为100μs,上升沿为10ns的固定幅度的脉冲指挥信号,同时触发各观测闪电的记录设备及GPS同步的高精度时钟,开始记录点定标在闪电发生时域的信号波形上,记录的绝对精度时间由高精度时钟标记,实现了同一闪电不同参量记录尺度开始记录点的一致性,为对比分析闪电不同参量精细结构及多站计算闪电到达时差提供了精确的基准点。
The transient analog signal of lightning discharge is captured, which selected by a window level for pre\|triggering, a pulse signal with a width of 100 μs and 10 ns positive slope of certain amplitude is generated. It can be used to trigger the observing instruments of lightning and precise clocks synchronized by GPS at the same time. The start point of recording can be fixed in the waveform generated by lightning discharge. The time of absolute recording precision is decided by the highly precise clock. So the different parameters of lightning discharge can be recorded at the same starting moment. A highly accurate time base is provided for analyzing the high resolution of parameters of lightning and the time difference of arrival at different observing sites.
出处
《高原气象》
CSCD
北大核心
2003年第3期311-314,共4页
Plateau Meteorology
基金
中国科学院知识创新工程重要方向项目(KZCX2 201)
国家自然科学基金"十五"重点项目(40135010)资助
关键词
同步记录触发
预置窗口电平
基准点
脉宽形成
Triggering of synchronizing record
Window level of pre-triggering
Time base
Pulse width generating
