| 摘要 |
<p>AN INTERFEROMETRIC OPTICAL FIBER ELECTRIC CURRENT MEASURING DEVICE The current-measuring device in accordance with the invention comprises an optical fiber wound around the conductor in which flows the current to be measured, a laser source, means for separating the radiation emitted by the source towards the two ends of the wound fiber, and for recombining the radiation emerging from these two ends, a conductor circuit through which flows an adjustable reference current, a detection device supplying a signal characteristic of the interferences between the two waves emerging from the fiber, the reference current being adjusted so that the phase shift between the two contra-rotating waves in the fiber is zero, this current being then proportional to the current to be meassured flowing in the principal conductor.</p> |
