利用红外光纤传像束测量桥丝感应电流

Induced current measurement in bridgewire EED through infrared optical fiber image bundle

针对传统的桥丝式电点火头中感应电流测量方法在电磁环境测量时会引入电场或者磁场的干扰,本文基于红外光纤传像束耦合CCD红外探测器,提出一种非接触式远程测量的新方法。通过CCD红外探测器得到桥丝式电点火头辐射的热场灰度图像,根据灰度值与温度、温度与电流的关系标定对应的桥丝微弱的感应电流值。实验结果表明,这种方法可以精确测量桥丝电流,为桥丝式电火工品的电磁环境效应评估提供了一条新的途径。

While the bridgewire electroexplosive device（EED） works in electromagnetic environment,conventional methods can introduce electromagnetic interference.A new method of measuring the induced current in EED is proposed in this article.The infrared optical fiber image bundle coupled with infrared CCD detector was used to detect induced current from long distance and under non-contact.At first,the thermal field images were acquired by infrared CCD detector.Then the value of weak induced current of corresponding bridgewire was further determined according to the relations between gray scale values and temperature,temperature and current.The experimental results show that the bridgewire current is accurately measured by this method.This method offers a new way to evaluate the electromagnetic effect of EED.