| 摘要 |
PURPOSE: An optical fiber displacement sensor by using a dual-side reflective measurement is provided to reduce noise and to obtain precise displacement signal by inputting two signals into a differential amplifier and a measuring amplifier. CONSTITUTION: An optical fiber displacement sensor(100) includes a sensor section having displacement sensors at upper and lower surfaces thereof and a displacement signal amplifying section(200). The displacement sensor has a moving member(150), a pair of light transmissive optical fiber and light receiving optical fiber(130,140), a light source(110) for radiating light through the light transmissive optical fiber(130), and a light receiving section(120) for receiving light through the light receiving optical fiber(140). The displacement signal amplifying section(200) includes a pair of photo-electronic converters(210,220) and a differential amplifier(230).
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