| 摘要 |
<p>A yarn defect detecting device (5) includes a transmitted light amplifying section (57a) adapted to output a transmitting signal (F) and a reflected light amplifying section (57b) adapted to output a reflecting signal (R), where when adjusting an amplification factor of the transmitted light amplifying section (57a) and an amplification factor of the reflected light amplifying section (57b), a microcomputer (60) adjusts the amplification factor in the transmitted light amplifying section (57a) based on the transmitting signal (F), and then adjusts the amplification factor in the reflected light amplifying section (57b) based on the reflecting signal (R).</p> |
