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    • 2. 发明授权
    • Digitizing method
    • 数字化方法
    • US4814998A
    • 1989-03-21
    • US31559
    • 1987-02-12
    • Hitoshi Aramaki
    • Hitoshi Aramaki
    • G01B21/20B23Q35/12G05B19/18G05B19/404G05B19/408G05B19/4097G05B19/42G06K11/00
    • G06K11/00G05B19/4207G05B2219/41363G05B2219/49381
    • A digitizing method for obtaining data indicative of the three-dimensional shape of an object by effecting movement along at least one axis (X or Y axis) under numerical control on the basis of path data and along another axis (Z) under tracer control and monitoring the present position along each axis. A numerial control unit performs numerical control to moving a tracer head in X and Y directions. A tracer control unit generates a Z-axis velocity command V.sub.z to move the tracer head along the Z axis. The numerical control unit counts pulses generated by a motor driving a tracer control axis to obtain the present position along the tracer control axis. The numerical control unit also obtains a commanded position along each numerical control axis (X,Y axes) by using the path data, and obtains a present position, represented by a machine position, by substracting an amount of servo-system delay (i.e., the contents of error registers) from the commanded position. Thereafter, each axial present position, represented by a machine position, is stored in a memory at predetermined time intervals.
    • PCT No.PCT / JP86 / 00339 Sec。 371日期1987年2月12日 102(e)1987年2月12日PCT PCT 1986年7月1日PCT公布。 出版物WO87 / 00266 日期1987年1月15日。一种数字化方法,用于通过在数值控制下基于路径数据沿着另一轴线沿着至少一个轴线(X或Y轴)移动来获得指示对象的三维形状的数据 (Z)进行跟踪控制,并监视沿着每个轴的当前位置。 数字控制单元执行数字控制以在X和Y方向上移动示踪器头。 示踪器控制单元生成Z轴速度指令Vz,以使跟踪头沿Z轴移动。 数字控制单元计算由驱动示踪器控制轴的电动机产生的脉冲,以获得沿着示踪器控制轴的当前位置。 数字控制单元还通过使用路径数据来获得沿着每个数控轴(X,Y轴)的指令位置,并通过减去伺服系统延迟量来获得由机械位置表示的当前位置(即, 错误寄存器的内容)。 此后,以机器位置表示的每个轴向存在位置以预定的时间间隔存储在存储器中。
    • 5. 发明授权
    • Positional servo system having three phase speed, numerical control
    • 位置伺服系统具有三相,数值控制
    • US3906324A
    • 1975-09-16
    • US35684173
    • 1973-05-03
    • HERBERT LTD A
    • SMITH IAN W
    • B23Q15/00B25J9/18G05B19/19G05B19/27G05B13/00
    • G05B19/27G05B2219/34465G05B2219/41363
    • A machine tool control system is disclosed incorporating a digital computer responsive to a microprogram. Also disclosed is a closed loop servo control system for controlling a variable, in which the error between the demanded and actual values of the variable is monitored and compared with a reference limit to produce a warning signal when the monitored error exceeds the reference limit. The reference limit is varied automatically in dependence on the rate of change of the demanded value of the variable. Further disclosed is a servo control system in which a controlled variable is adjusted towards a demanded value at a speed which initially increases at a predetermined rate and is then held constant. The total required change in the controlled variable is initially stored and, in response to each incremental change in the controlled variable towards the demanded value, the stored value is decremented by a corresponding amount if the variable is changing at the constant speed and by twice the corresponding amount if the variable is changing at the increasing speed. When the stored value has been completely offset, the speed at which the controlled variable changes is reduced to zero at the same rate as the predetermined rate at which it was initially increased towards the constant speed.
    • 公开了一种机器控制系统,其结合了响应于微程序的数字计算机。 还公开了一种用于控制变量的闭环伺服控制系统,其中监测变量的要求值和实际值之间的误差,并将其与参考极限进行比较,以在监视的误差超过参考极限时产生警告信号。 参考限制根据变量所需值的变化率自动变化。 进一步公开了一种伺服控制系统,其中以最初以预定速率增加的速度朝向所需值调节受控变量,然后保持恒定。 最初存储控制变量的总需求变化,并且响应于控制变量朝向要求值的每个增量变化,如果变量以恒定速度变化并且存储值减少两倍 如果变量以增加的速度变化,则相应的量。 当存储值已被完全偏移时,控制变量改变的速度以与初始向恒定速度增加的预定速率相同的速率减小到零。
    • 6. 发明授权
    • Phase displacement detection system
    • 相位检测系统
    • US3851155A
    • 1974-11-26
    • US36768273
    • 1973-06-06
    • ATOMIC ENERGY COMMISSION
    • HEWGLEY RTUCKMAN M
    • G05B19/33G06M3/02
    • G06M3/02G05B19/33G05B2219/41363
    • A phase displacement detection circuit has been provided which continuously monitors the phase displacement between a pair of input signals. This circuit is particularly useful in combination with a numerically controlled machine which employs redundant position sensing feedback systems such as a resolver feedback and an interferometer feedback system to increase machining accuracy. The error detection circuit employs a digital discriminator for comparison of the phase relationship between the resolver feedback and the interferometer feedback signals. At the time of first detection of either feedback signal, a counter is triggered ''''on'''' to count clock pulses and subsequently turned ''''off'''' and reset to the zero state at the time of detection of the other feedback signal. The elapsed time between the detection of the two feedback signals and, therefore, the number of counts accumulated in the counter, is a direct measure of the error between the two systems. By selecting a particular count output through selective gating circuitry connected to the counter, the system may be used to sound an alarm or shut down the machine when the selected count is exceeded, indicating an excessive error.
    • 已经提供了一种相位移检测电路,其连续监视一对输入信号之间的相位偏移。 该电路与采用诸如分解器反馈和干涉仪反馈系统之类的冗余位置传感反馈系统的数控机器组合特别有用,以提高加工精度。 误差检测电路采用数字鉴别器来比较分解器反馈和干涉仪反馈信号之间的相位关系。 在第一次检测到任一反馈信号时,计数器触发“接通”以对时钟脉冲进行计数,随后在“检测到另一个反馈信号”时将其关闭并复位为零状态。 在两个反馈信号的检测之间经过的时间,因此累积在计数器中的计数的数量是两个系统之间的误差的直接测量。 通过选择连接到计数器的选通选通电路选择特定的计数输出,当超过所选计数时,系统可能会用于发出警报或关闭机器,表示过大的错误。