一种矩形波导打火检测装置的设计

介绍了一种矩形波导打火检测电路,分析了打火探测点的选取和光敏器件的选择。理论分析及计算的结论是:在矩形弯头波导窄壁中间选择了一个小孔作为打火探测点,选择光电二极管SFH250V作为光敏器件。以SFH250V为核心器件,设计了一种打火探测及故障快速锁存电路,主要解决了微弱光信号的探测问题,解决了微弱光电流信号的转换及放大问题,同时设计了打火故障判断及故障信号输出电路。实验表明,该装置可以有效地捕获较微弱的打火故障信号。

Design of detecting circuit for arcing inside waveguide

A circuit for detecting arcing in rectangular waveguide is introduced, and the selection of arcing detecting point and photosensitive instruments are analyzed. The conclusions of theoretical analysis and calculations are that the arcing detecting point is chosen in the middle of the rectangular waveguide narrow walls and the photoelectric cell SFH250V is utilized as the photosensitive instrument. Treating SFH250V as the key instrument, an arcing detecting and malfunction fast flip-latch circuit is designed, which solves the problems of weak optical signals detection and weak photocurrent signals conversion and amplification. Meanwhile, the circuit of the arcing malfunction estimation and malfunction signals export is designed. The experimental results indicate that this setup can catch weak arc malfunction signals efficiently.