DIGITAL MEASUREMENT SYSTEM FOR MEASURING LIGHTNING ELECTRIC FIELD CHANGE SIGNAL, AND MEASUREMENT METHOD THEREOF

摘要

A digital measurement system for measuring a lightning electric field change signal, and a measurement method thereof. The system comprises at least a planar antenna (1), an electric field analog-to-digital conversion module (4), and a digital signal processing module (5). The input end of the electric field analog-to-digital conversion module (4) is connected to the planar antenna (1), and the output end of the electric field analog-to-digital conversion module (4) is connected to the digital signal processing module (5). The planar antenna (1) is used for detecting a field change signal generated by lightning and transmitting the field change signal to the electric field analog-to-digital conversion module (4). The electric field analog-to-digital conversion module (4) is used for processing and converting the electric field change signal, to obtain a digital lightning electric field change signal and transmit the digital lightning electric field change signal to the digital signal processing module (5). The digital signal processing module (5) is used for: triggering collection, processing of the digital lightning electric field change signal, to obtain a lightning electric field rapid change signal, a lightning electric field slow change signal, and a lightning electric field original signal, storing the signals, and combining the signals into data frames for external communication. The measurement system and the measurement method thereof can implement measurement of rapid and slow changes of a lightning electric field with low costs and high efficiency.