公开(公告)号：US5142241A

公开(公告)日：1992-08-25

申请号：US744087

申请日：1991-08-12

申请人： Ryuichiro Yamamoto ,  Hiromi Saito ,  Tomonori Morita

发明人： Ryuichiro Yamamoto ,  Hiromi Saito ,  Tomonori Morita

IPC分类号： H03F3/45

CPC分类号： H03F3/45076

摘要： A differential input circuit includes a first bias generating circuit, a second bias generating circuit, a differential circuit, a first capacitor, and a second capacitor. The first bias generating circuit applies an input signal and a bias voltage divided by first dividing resistors to a first source follower FET and outputs a resultant value through first level shift diodes. The second bias generating circuit applies a bias voltage divided by second dividing resistors to a second source follower FET and outputs a resultant value through second level shift diodes. The differential circuit includes first and second switching FETs respectively having gates connected to outputs of the first and second bias generating circuits. The first capacitor connects the output of the first switching FET to a gate electrode of the second switching FET. The second capacitor connects an output terminal of the second bias generating circuit to a gate electrode of the second source follower FET.

公开(公告)号：US20070093976A1

公开(公告)日：2007-04-26

申请号：US11535098

申请日：2006-09-26

申请人： MAKOTO NISHIZAWA ,  Harumichi Tokuyama ,  Tomonori Morita

发明人： MAKOTO NISHIZAWA ,  Harumichi Tokuyama ,  Tomonori Morita

IPC分类号： G01L7/00 ,  G01H13/00

CPC分类号： G01M13/028 ,  G01H13/00 ,  G05B23/0283

摘要： White noise is applied to a servocontrol system of a servomotor in order to measure a frequency characteristic of a mechanical component in an electric injection molding machine, and a signal from an encoder is applied to a fast Fourier converter. Data from the fast Fourier converter is applied to a memory unit, and the content of the memory unit is displayed on a display unit in the form of a board diagram. Repair announcement is issued when a deviation of the resonant frequency of each mechanical component with respect to data at an initial setting time exceeds a predetermined value.

摘要翻译： 白噪声被施加到伺服电动机的伺服控制系统，以便测量电动注塑机中的机械部件的频率特性，并将来自编码器的信号应用于快速傅立叶变换器。 来自快速傅里叶变换器的数据被应用于存储器单元，并且存储单元的内容以板图的形式显示在显示单元上。 当每个机械部件的谐振频率相对于初始设定时间的数据的偏差超过预定值时，发出修理通知。

公开(公告)号：US07369964B2

公开(公告)日：2008-05-06

申请号：US11535098

申请日：2006-09-26

申请人： Makoto Nishizawa ,  Harumichi Tokuyama ,  Tomonori Morita

发明人： Makoto Nishizawa ,  Harumichi Tokuyama ,  Tomonori Morita

IPC分类号： G06F15/00

CPC分类号： G01M13/028 ,  G01H13/00 ,  G05B23/0283

摘要： White noise is applied to a servocontrol system of a servomotor in order to measure a frequency characteristic of a mechanical component in an electric injection molding machine, and a signal from an encoder is applied to a fast Fourier converter. Data from the fast Fourier converter is applied to a memory unit, and the content of the memory unit is displayed on a display unit in the form of a board diagram. Repair announcement is issued when a deviation of the resonant frequency of each mechanical component with respect to data at an initial setting time exceeds a predetermined value.

摘要翻译： 白噪声被施加到伺服电动机的伺服控制系统，以便测量电动注塑机中的机械部件的频率特性，并将来自编码器的信号应用于快速傅立叶变换器。 来自快速傅里叶变换器的数据被应用于存储器单元，并且存储单元的内容以板图的形式显示在显示单元上。 当每个机械部件的谐振频率相对于初始设定时间的数据的偏差超过预定值时，发出维修通知。