| 摘要 |
PURPOSE: A remote monitoring method of the tightness of stator windings is provided to monitor the state of electrical devices simply and accurately. CONSTITUTION: A light source (52) provides light with a plurality of wavelengths. A light separation sensor (30), which is located on a stator core, includes an optical interface element which separately absorbs optical power depending on whether it is a first wavelength or a second wavelength. After the optical interface element absorbs the optical power, a wattmeter (58) measures the intensity of the optical power of the first wavelength and the second wavelength. A control sub system (60) determines the tightness of stator windings using the measured intensity of the optical power. [Reference numerals] (52) Light source; (58) Wattmeter; (60) Control sub system |
