公开(公告)号：US20030024272A1

公开(公告)日：2003-02-06

申请号：US10108456

申请日：2002-03-29

申请人： THE FURUKAWA ELECTRIC CO., LTD.

发明人： Yasuhiro Naka ,  Kazuhiro Kawano

IPC分类号： C03B037/07

CPC分类号： C03B37/02745 ,  C03B37/027 ,  C03B37/02718 ,  C03B37/02736 ,  C03B37/02772 ,  C03B37/029 ,  C03B37/032 ,  C03B2203/19 ,  C03B2205/06 ,  C03B2205/40 ,  C03B2205/44 ,  C03B2205/45 ,  C03B2205/72 ,  C03B2205/91 ,  C03C25/18 ,  C03C25/70

摘要： After the start of the control operation of a drawing apparatus, the operation control of a line speed being the drawing-in speed of an optical fiber is performed by a line speed control unit (19), and an optical-fiber feed speed control is performed by a preform feed speed control unit (22), in order that an optical fiber outside diameter measured by an optical-fiber outside diameter measurement unit (8) may become a target outside diameter. By way of example, in a case where the distal end of an optical fiber preform is not in a shape steadily melted in a heating furnace, the preform speed control unit (22) controls the feed speed of the optical fiber preform in the three stages of an optical-fiber-preform initial feed speed control, an acceleration-associated preform feed speed control and a line speed-associated preform feed speed control. In a case where the distal end of the optical fiber preform is in the steadily melted shape, the unit (22) controls the preform feed speed in two stages in which the acceleration-associated preform feed speed control is omitted from the three stages. In optical fiber drawing, troubles such as the breaking of the optical fiber can be suppressed even during the acceleration of the line speed.

摘要翻译： 在绘图装置的控制操作开始之后，通过线速度控制单元（19）执行作为光纤的绘制速度的线速度的操作控制，并且光纤馈送速度控制是 由预成型件进给速度控制单元（22）执行，以便由光纤外径测量单元（8）测量的光纤外径可以成为目标外径。 作为示例，在光纤预制棒的前端不是在加热炉中不稳定地形成的形状的情况下，预成型体速度控制单元（22）将光纤预制件的进给速度控制在三个阶段 光纤预制件初始进给速度控制，加速相关的预成型件进给速度控制和与线速度相关的预成型件进给速度控制。 在光纤预制件的远端处于稳定熔融状态的情况下，单元（22）在三级中省略加速度相关的预成型件进给速度控制的两个阶段来控制预成型件进给速度。 在光纤拉丝中，即使在线速度加快的情况下，也能够抑制光纤的断裂等故障。