Method and apparatus for detecting so-called moire effect during spinning
    2.
    发明授权
    Method and apparatus for detecting so-called moire effect during spinning 失效
    在纺纱期间检测所谓的莫尔效应的方法和装置

    公开(公告)号:US4056926A

    公开(公告)日:1977-11-08

    申请号:US693151

    申请日:1976-06-07

    申请人: Wolfgang Stuber

    发明人: Wolfgang Stuber

    IPC分类号: D01H13/14 D01H13/32 D01H13/22

    CPC分类号: D01H13/32

    摘要: In the method, the number of defective portions of the yarn, occurring at periodic spacings within a predetermined time period, is detected to provide a detected value. This detected value is compared with a predetermined desired value of the number of defective portions within such predetermined time period. If the detected value exceeds the desired value, an output signal is provided or released to a stop device, control device, or the like of the spinning machine. The device comprises a thread monitor connected to a pulser which produces pulses responsive to variations in the yarn thickness. The output of the pulser is supplied to a thick portion monitor which detects long pulses produced responsive to relatively long defects in the yarn, and the thick portion monitor is connected to a time switch which, in turn, is connected to a signalling device, stop device, or control device for the spinning machine. A moire monitor is connected, in parallel with the thick portion monitor, between the pulser and the time switch, and detects short pulses produced by the pulser responsive to the periodically occurring defective portions of the yarn. In one embodiment of the invention, the moire monitor comprises a RC circuit receiving the pulses and connected with an additional resistor. In another embodiment of the invention, the moire monitor comprises a counter and a timing pulse generator.

    摘要翻译: 在该方法中,检测在预定时间段内以周期性间隔发生的纱线的缺陷部分的数量,以提供检测值。 将该检测值与该预定时间段内的缺陷部分的数量的预定期望值进行比较。 如果检测值超过期望值,则向纺纱机的停止装置,控制装置等提供或释放输出信号。 该装置包括连接到脉冲发生器的线程监视器,其产生响应于纱线厚度变化的脉冲。 脉冲发生器的输出被提供给厚度监视器,其检测响应于纱线中相对长的缺陷产生的长脉冲,并且厚部监视器连接到时间开关,时间开关又连接到信号装置,停止 设备或纺纱机的控制装置。 在脉冲发生器和时间开关之间,将莫尔条纹监视器与厚部监视器并联连接,并且响应于周期性地出现的纱线的缺陷部分,检测由脉冲发生器产生的短脉冲。 在本发明的一个实施例中,莫尔监测器包括接收脉冲并与附加电阻器连接的RC电路。 在本发明的另一个实施例中,莫尔条纹监视器包括计数器和定时脉冲发生器。