| 摘要 |
An optical fiber type vibration meter including a light source, an incident side optical fiber guiding light from the light source, a vibration probe to which a guided light is made incident, an optical receiver photoelectric-converting light modulated by a vibration of a weight and a movable coil arranged in the vibration probe to output the light as an electrical signal, a processor processing the electrical signal to output a state of the vibration as an output voltage value, a velocity pickup converting a velocity of the weight and the movable coil arising from the vibration of the weight and the movable coil into an electrical current, a solenoidal coil generating a magnetic field by the electrical current, and a magnetic field sensor attenuating an amount of light guided to the vibration probe according to an intensity of the magnetic field.
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