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    • 56. 发明授权
    • System for detecting rotational speed
    • 检测转速的系统
    • US4518916A
    • 1985-05-21
    • US395020
    • 1982-06-23
    • Shigeki KawadaHiroshi Ishida
    • Shigeki KawadaHiroshi Ishida
    • G01P3/42G01P3/44G01P3/46G01P3/48G01P3/481G01P3/54
    • G01P3/481G01P3/44G01P3/46G01P3/4802
    • A system for detecting the rotational speed of a rotating body comprising the steps of generating two kinds of signals A and B having alternating wave forms and corresponding to the rotational speed of the rotating body by means of position-detecting devices (5a, 5b), the signals A and B having the same amplitude and having phases deviating by 90.degree., producing switching signals S(A), S(A), S(B), and S(B) from the signals A and B by means of zero-cross circuits (711, 712), producing inverted signals A and B from the signals A and B by means of inverter circuits (72, 73), producing differentiation signals dA, dA, dB, and dB by supplying the signals A, A, B and B to differentiation circuits (74, 75, 76, 77), and obtaining output signals corresponding to the rotational speed of the rotating body by selectively switching the differentiation signals dA, dA, dB, and dB in a switching circuit 78 by means of the switching signals S(A), S(A), S(B), and S(B), thereby detecting the rotational speed of the rotating body.
    • PCT No.PCT / JP81 / 00313 Sec。 371日期1982年6月23日 102(e)日期1982年6月23日PCT提交1981年10月29日PCT公布。 公开号WO82 / 01594 日期:1982年5月13日。一种用于检测旋转体的旋转速度的系统,包括以下步骤:通过位置检测装置产生具有交替波形并对应于旋转体的旋转速度的两种信号A和B (5a,5b),信号A和B具有相同的振幅并且相位偏离90°,从而产生开关信号S(A),S(&upbar& A),S(B)和S(&upbar&B) 信号A和B通过过零电路(711,712)通过反相器电路(72,73)从信号A和B产生反相信号和上行& A和& upbar&B,产生微分信号dA,& 通过向差分电路(74,75,76,77)提供信号A,& B和& B和B的信号A,& B和A,并且通过选择性地切换微分信号来获得与旋转体的旋转速度相对应的输出信号 dA,&upbar&d,dB和& upbar&d在开关电路78b y(s),S(&upbar& A),S(B),S(&upbar&B)),从而检测旋转体的旋转速度。
    • 57. 发明授权
    • Induction motor control system
    • 感应电动机控制系统
    • US4434393A
    • 1984-02-28
    • US388926
    • 1982-06-16
    • Katsuo KobariHiroshi IshidaNaoto Ota
    • Katsuo KobariHiroshi IshidaNaoto Ota
    • H02P3/18H02P23/06H02P27/06H02P7/62H02M5/458
    • H02P23/06
    • A control circuit for driving an induction motor wherein an AC voltage is converted into a direct current by a rectifying circuit and the direct current is converted into a signal having a variable voltage and frequency by a transistor inverter connected in parallel with a smoothing capacitor, and a regenerative circuit is connected in parallel with the inverter, and a circuit is provided for comparing the terminal voltage V.sub.C of the smoothing capacitor and a reference voltage V.sub.r when braking is to take place is disclosed. When condition V.sub.C .gtoreq.V.sub.r exists, the transistor inverter is disabled but the regenerative circuit is allowed to operate; when the condition V.sub.C
    • 一种用于驱动感应电动机的控制电路,其中通过整流电路将AC电压转换为直流电,并且通过与平滑电容器并联连接的晶体管反相器将直流转换成具有可变电压和频率的信号,以及 再生电路与逆变器并联连接,并且提供了用于比较平滑电容器的端子电压VC和制动时的参考电压Vr的电路。 当条件VC> / = Vr存在时,晶体管反相器被禁止,但允许再生电路工作; 当存在条件VC
    • 58. 发明授权
    • Induction motor drive apparatus
    • 感应电动机驱动装置
    • US4361794A
    • 1982-11-30
    • US211846
    • 1980-12-01
    • Shigeki KawadaHiroshi Ishida
    • Shigeki KawadaHiroshi Ishida
    • H02P21/12H02P21/00H02P21/06H02P27/04H02P27/06H02P5/40
    • H02P21/06H02P21/00
    • An induction motor drive apparatus of the type having a speed detector for detecting the rotational speed of an induction motor, speed command device for producing a command speed, and an error amplifier for amplifying a difference between the rotational speed of the induction motor and the command speed, the induction motor being driven by so controlling the amplitude of the primary current as to vary the amplitude of the secondary current in accordance with the difference between the rotational and command speeds. Included are two-phase sinusoidal wave generating device for generating two sinusoidal signals displaced in phase from one another by .pi./2 and whose amplitudes conform to the output of the error amplifier, primary load current arithmetic device for computing a primary load current by employing the output of the error amplifier and the output of the two-phase sinusoidal wave generating means, and primary current arithmetic means for computing a two-phase primary current command by adding the primary load current to the output of the two-phase sinusoidal wave generating device, which output serves as an excitation current. The induction motor is driven by the primary current command having an excitation current component and a primary load current component the amplitudes of which vary in accordance with the difference between the rotational speed of the induction motor and the command speed.
    • 一种感应电动机驱动装置,具有用于检测感应电动机的转速的速度检测器,用于产生指令速度的速度指令装置和用于放大感应电动机的转速与指令之间的差的误差放大器 通过控制一次电流的振幅来驱动感应电动机,以根据转速和指令速度之间的差来改变次级电流的幅度。 包括两相正弦波产生装置,用于产生两相正交信号,它们彼此相位移位π/ 2,其幅度符合误差放大器的输出,主负载电流运算装置用于计算主负载电流,采用 误差放大器的输出和两相正弦波发生装置的输出;以及初级电流运算装置,用于通过将主负载电流加到两相正弦波产生装置的输出端来计算二相一次电流指令 ,该输出用作励磁电流。 感应电动机由具有励磁电流分量和主要负载电流分量的初级电流指令驱动,其振幅根据感应电动机的转速和指令速度之间的差异而变化。
    • 59. 发明授权
    • Abnormality detecting system for DC motor control apparatus
    • 直流电机控制装置异常检测系统
    • US4275342A
    • 1981-06-23
    • US95077
    • 1979-11-16
    • Shigeki KawadaKatsuo KobariHiroshi Ishida
    • Shigeki KawadaKatsuo KobariHiroshi Ishida
    • H02H7/093H02P5/16
    • H02H7/093Y10S388/903Y10S388/909
    • In a DC motor control apparatus for driving a DC motor in accordance with a signal of the difference between a revolving speed signal from a speed detector coupled with the DC motor and a command speed signal so as to drive the DC motor at a revolving speed indicated by the command speed signal, when a voltage to be applied to the DC motor and the revolving speed signal from the speed detector are both detected, the operation of the DC motor control apparatus is decided as normal, and when the voltage to the DC motor is detected but the revolving speed signal from the speed detector is not detected, the operation of the DC motor control apparatus is decided as abnormal and an alarm signal is produced.
    • 在直流电动机控制装置中,根据来自与直流电动机相连的速度检测器的转速信号与指令速度信号之间的差的信号驱动直流电动机,以便以指示的转速驱动直流电动机 通过指令速度信号,当检测到施加到直流电动机的电压和来自速度检测器的转速信号都被检测到时,直流电动机控制装置的操作被正常地确定,并且当直流电动机的电压 被检测出来,但没有检测到来自速度检测器的转速信号,直流电动机控制装置的动作被判定为异常,产生了报警信号。
    • 60. 发明授权
    • Display system and computer-readable medium
    • 显示系统和计算机可读介质
    • US09236027B2
    • 2016-01-12
    • US13708623
    • 2012-12-07
    • Hiroshi Ishida
    • Hiroshi Ishida
    • G09G5/10G09G3/20
    • G09G5/10G09G3/20G09G2320/0285G09G2320/0693G09G2360/147
    • The present invention provides a display system capable of efficiently calibrating image content even when the image is displayed and thereby capable of reducing the time and cost required for calibration, and also provides a computer-readable recording medium. The control device thereof processes an image to be displayed on a display section beforehand so as to be usable for calibration. While the image is actually being displayed on the display section, the control device captures an image displayed on the display section using a capturing device at the timing at which a calibration image is displayed, compares the luminance or color in the calibration image with the luminance or color in the image obtained by capturing the calibration image, and creates correction information for correcting an image signal to be output to the display section on the basis of the result of the comparison.
    • 本发明提供了即使在显示图像时能够有效地校准图像内容,从而能够减少校准所需的时间和成本的显示系统,并且还提供计算机可读记录介质。 其控制装置预先处理要在显示部分上显示的图像,以便可用于校准。 当图像实际上显示在显示部分上时,控制装置在显示校准图像的时刻利用捕获装置拍摄显示在显示部分上的图像,将校准图像中的亮度或颜色与亮度 或通过捕获校准图像获得的图像中的颜色,并且基于比较的结果创建用于校正要输出到显示部分的图像信号的校正信息。