Study on the induced current measurement in bridgewire EED

In this study, an infrared optical fiber light splitting system is proposed for the measurement of induced current in bridgewire electroexplosive device (EED). The system includes infrared optical fiber that eliminates interference from external electromagnetic radiation, a lens assembly that optimally focuses the infrared energy from the bridgewire to the infrared fiber and no‐touch the bridgewire, two infrared detectors that measure the middle and near infrared radiation from bridgewire, respectively, and a photomodulator and phase‐locked amplifiers that depress the noises. The experimental results suggest that the induced current in bridgewire can be an accurate determination by using this system, and the measurement error is less than 0.0154 mA in high‐temperature region. A new method is provided to confirm the safety and reliability of the electric ignition system in electromagnetic environment. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2833–2835, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23845