| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a power source monitoring sensor, using a Faraday element type optical switch having higher durability at a lower cost. SOLUTION: The sensor includes an electromagnet adapted to generate a magnetic field, when a monitoring power source is turned on, a Faraday element type optical switch installed near the electromagnet and an optical fiber connected to the Faraday element type optical switch and a signal detector.</p> |
