| 摘要 |
<p>PURPOSE:To enable to measure always stable voltage irrespective of the contact or noncontact of a pantograph by employing a sensor having electro-optical effect and an optical fiber to form a voltage detection transmitter. CONSTITUTION:A sensor 10 having electro-optic effect is disposed under a trolley wire 1 in parallel with a mount of a pantograph 2 on a runner 3. The sensor 10 produces an electric field E by the voltage V of the wire 1, and the light of constant polarized wave incident through an optical fiber or through an optical fiber and a polarizer to the sensor 10 varies in the polarized surface by the field E in the sensor 10. The variation in the polarized surface is detected by an output fiber or an output polarizer and the optical fiber, thereby measuring the voltage of the wire 1.</p> |
