一种宽频带小型化光纤电场测量系统的研制

Design of a wideband and minitype optical fiber metrical system

摘要:

设计了一种宽频带小型化模拟量光纤电场测量系统，解决了核爆、雷电和电磁脉冲模拟器等辐射源产生的强电磁干扰环境下的瞬态电场测量问题。该系统采用单极子天线将空间瞬态电场转化为瞬态电压，并由置于探头内部的微型发射机将瞬态电压信号转化为光信号，通过光纤传输到远端的光接收机，最终还原成电信号。该系统在不同辐射源上进行实验测试，其工作性能稳定。系统的工作带宽在24 kHz到1 000 MHz之间，噪声小于12 mV，能测量小于100 kV/m的瞬态电场，输出信号峰－峰值大于400 mV。

Abstract:

A wideband, minitype and analog optical fiber system was designed for measuring instantaneous electric field produced by nuclear burst with a strong electromagnetic interference. In the system, a monopole antenna was used to convert electric field into voltage, at the same time a minitype transmitter converted voltage into optical signal, and the optical signal was send to the receiver which was far away from transmitter by the optical fiber, finally the voltage was received at the receiver. The system was of good performance, with bandwidth 24 kHz~1 000 MHz, noise smaller than 12 mV.