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27 条记录 (耗时 0.028 秒)

    Two-unit pump for liquid chromatograph with flow sensor arrangement
    8.
    发明授权
    Two-unit pump for liquid chromatograph with flow sensor arrangement 失效
    液体色谱仪两单元泵，配有流量传感器

    公开(公告)号：US08123496B2

    公开(公告)日：2012-02-28

    申请号：US12845487

    申请日：2010-07-28

    申请人： Kimihiko Ishii ,  Kiyotoshi Mori ,  Masahito Ito ,  Hironori Kaji ,  Takefumi Yokokura

    发明人： Kimihiko Ishii ,  Kiyotoshi Mori ,  Masahito Ito ,  Hironori Kaji ,  Takefumi Yokokura

    IPC分类号： F04B1/06 ,  F04B49/20 ,  B01D15/10

    CPC分类号： G01N30/32 ,  G01N30/34 ,  G01N2030/322 ,  G01N2030/326

    摘要： A pump device which accurately detects a flow rate of a pump, performs real-time control of the flow rate, and thus can suppress a flow rate error caused by occurrence of pulsation. Control of a pump rotation speed by a pressure sensor has low responsiveness in a low pressure region, and a correlation between a pressure and a flow rate is incomplete in a high flow rate region. With this taken into consideration, a flow rate sensor is disposed at an outlet port of a second pump. A position detection sensor detects a point where a first pump is shifted from a suction mode to a discharge mode. Moreover, the flow rate sensor detects that there is no discharge from the pump, and that there is discharge from the pump alone. Accordingly, a controller sets a rotation speed of a motor to a speed double the previous speed (double the normal rotation speed). When the flow rate sensor detects an increase in the flow rate at the outlet port of the second pump, the controller returns the rotation speed of the motor to a normal rotation speed. The rotation speed of the motor is controlled by accurate flow rate detection by the flow rate sensor. Thus, occurrence of pulsation can be suppressed.

    摘要翻译： 准确地检测泵的流量的泵装置，对流量进行实时控制，能够抑制由脉动发生引起的流量误差。 通过压力传感器控制泵的转速在低压区域的响应性低，在高流量区域中压力与流量的相关性不完全。 考虑到这一点，流量传感器设置在第二泵的出口处。 位置检测传感器检测第一泵从吸入模式移动到排出模式的点。 此外，流量传感器检测到没有来自泵的放电，并且仅从泵排出。 因此，控制器将电动机的转速设定为与先前速度相同的速度（正常转速的两倍）。 当流量传感器检测到第二泵的出口处的流量增加时，控制器将马达的转速恢复到正常的转速。 通过流量传感器的精确流量检测来控制电动机的转速。 因此，可以抑制脉动的发生。

    PUMP FOR LIQUID CHROMATOGRAPH
    9.
    发明申请
    PUMP FOR LIQUID CHROMATOGRAPH 失效
    液相色谱泵

    公开(公告)号：US20100288027A1

    公开(公告)日：2010-11-18

    申请号：US12845487

    申请日：2010-07-28

    申请人： Kimihiko Ishii ,  Kiyotoshi Mori ,  Masahito Ito ,  Hironori Kaji ,  Takefumi Yokokura

    发明人： Kimihiko Ishii ,  Kiyotoshi Mori ,  Masahito Ito ,  Hironori Kaji ,  Takefumi Yokokura

    IPC分类号： G01N30/00 ,  B01D35/157

    CPC分类号： G01N30/32 ,  G01N30/34 ,  G01N2030/322 ,  G01N2030/326

    摘要： A pump device is realized, which accurately detects a flow rate of a pump, performs real-time control of the flow rate, and thus can suppress a flow rate error caused by occurrence of pulsation. Control of a pump rotation speed by a pressure sensor has low responsiveness in a low pressure region, and a correlation between a pressure and a flow rate is incomplete in a high flow rate region. With this taken into consideration, a flow rate sensor 10 is disposed at an outlet port 9 of a second pump 4. A position detection sensor 14 detects a point where a first pump 3 is shifted from a suction mode to a discharge mode. Moreover, the flow rate sensor 10 detects that there is no discharge from the pump 3, and that there is discharge from the pump 4 alone. Accordingly, a controller 15 sets a rotation speed of a motor 12 to a speed double the previous speed (double the normal rotation speed). When the flow rate sensor 10 detects an increase in the flow rate at the outlet port 9 of the second pump 4, the controller 15 returns the rotation speed of the motor 12 to a normal rotation speed. The rotation speed of the motor 12 is controlled by accurate flow rate detection by the flow rate sensor 10. Thus, occurrence of pulsation can be suppressed.

    摘要翻译： 实现了能够精确地检测泵的流量的泵装置，实现流量的实时控制，能够抑制由脉动发生引起的流量误差。 通过压力传感器控制泵的转速在低压区域的响应性低，在高流量区域中压力与流量的相关性不完全。 考虑到这一点，流量传感器10设置在第二泵4的出口9处。位置检测传感器14检测第一泵3从吸入模式移动到放电模式的点。 此外，流量传感器10检测到没有来自泵3的排出，并且仅从泵4排出。 因此，控制器15将电动机12的转速设定为与先前速度（正常转速两倍）的速度。 当流量传感器10检测到第二泵4的出口9处的流量增加时，控制器15将马达12的转速恢复到正常的转速。 通过流量传感器10的精确的流量检测来控制电动机12的转速。因此，可以抑制脉动的发生。