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    • 4. 发明授权
    • Analog to digital converter
    • 模拟到数字转换器
    • US3710378A
    • 1973-01-09
    • US3710378D
    • 1971-03-22
    • ALLEN BRADLEY CO
    • RADTKE JKIFFMEYER W
    • G05B19/39H03M1/00H03K13/02
    • G05B19/39G05B2219/37112G05B2219/37486H03M1/34
    • An analog error signal is received from a machine tool position sensor. Its magnitude is sensed by a comparator circuit including an operational amplifier and a digital output level is generated when a particular analog voltage level is sensed. The digital output level resets the position sensor to restore the analog output signal and the comparator circuit to their initial state. A reset circuit, including two monostable circuits, generate a delayed reset pulse to the input of the comparator to reset its output if the analog input signal fails to do so. Forward and reverse directional circuits including NAND logic gates are connected together in parallel to the comparator output and conditioned by forward and reverse reference signals to convey the digital output from the comparator when the machine is moving in the direction to which the comparator has been preconditioned.
    • 从机床位置传感器接收到模拟误差信号。 其大小由包括运算放大器的比较器电路感测,并且当感测到特定模拟电压电平时产生数字输出电平。 数字输出电平复位位置传感器,将模拟输出信号和比较电路恢复到初始状态。 包括两个单稳态电路的复位电路在比较器的输入端产生延迟的复位脉冲,如果模拟输入信号不能这样做,则复位其输出。 包括NAND逻辑门的正向和反向电路与比较器输出并联连接在一起,并且通过正向和反向参考信号进行调节,以在机器沿比较器已被预处理的方向移动时传送来自比较器的数字输出。
    • 5. 发明授权
    • High speed digital tracking system
    • 高速数字跟踪系统
    • US3673395A
    • 1972-06-27
    • US3673395D
    • 1971-02-05
    • INDUCTOSYN CORP
    • TRIPP ROBERT W
    • G05B19/40H03M1/00H03K25/04G01B7/02
    • G05B19/40G05B2219/35481G05B2219/37486H03M1/86
    • Disclosed is a digital readout system, in which a to-be-measured function F(x) (e.g., space position of an Inductosyn transducer) is tracked and measured by a measuring function F(y) (e.g., electrical signal). The to-be-measured function F(x) typically exhibits velocities dF(x)/dt and/or accelerations d2F(x)/dt2. In order to match the variations of F(y) to those of F(x), F(y) exhibits an acceleration dor of F(y)/dt2 which by system design at least exceeds any acceleration d2F(x)/dt2 of F(x) which is to be encountered. The measuring function F(y) is then derived by two controlled integrations of d2F(y)/dt2. The first integration, controlled by the error signal from an Inductosyn transducer, produces the velocity dF(y)/dt of F(y). The second integration, controlled by the sign of the velocity dF(y)/dt, produces F(y) itself. F(y) tracks and is an accurate measure of F(x). Additionally, the velocity dF(x)/dt of F(x) is tracked by the velocity dF(y)/dt of F(y). A second order servo system is produced in which both the velocity and position of the measuring function F(y) track the velocity and position of the to-bemeasured function F(x).
    • 公开了一种数字读出系统,其中通过测量函数F(y)(例如,电信号)跟踪并测量待测量的函数F(x)(例如,Inductosyn换能器的空间位置)。 待测量函数F(x)通常表现出速度dF(x)/ dt和/或加速度d 2F(x)/ dt2。 为了匹配F(y)与F(x)的变化,F(y)表示加速度d或F(y)/ dt2,通过系统设计,F(y)/ dt2至少超过任何加速度d2F(x)/ dt2 的F(x)。 然后通过d2F(y)/ dt2的两个受控积分得到测量函数F(y)。 由Inductosyn传感器的误差信号控制的第一次积分产生F(y)的速度dF(y)/ dt。 由速度dF(y)/ dt的符号控制的第二次积分产生F(y)本身。 F(y)轨迹,是F(x)的精确测量。 此外,F(x)的速度dF(x)/ dt由F(y)的速度dF(y)/ dt跟踪。 产生二阶伺服系统,其中测量函数F(y)的速度和位置跟踪被测量函数F(x)的速度和位置。
    • 8. 发明授权
    • Positioning control device for an electric motor
    • 电动机定位控制装置
    • US4651073A
    • 1987-03-17
    • US774396
    • 1985-09-10
    • Wataru ShimizuYasuhiro Yuasa
    • Wataru ShimizuYasuhiro Yuasa
    • H02P3/04G05B19/35G05B19/416G05D3/00G05D23/275
    • G05B19/358G05B19/416G05B2219/34387G05B2219/37313G05B2219/37486G05B2219/41105G05B2219/41279G05B2219/41288G05B2219/43019G05B2219/43115G05B2219/50187
    • A rotational position, velocity and acceleration of an electrical motor are detected and an amount of overrun produced when the motor has stopped is estimated from the detected velocity and acceleration, and at least one of motor position detection data and a positioning target value is changed in accordance with the estimated amount of overrun. The position detection data and the positioning target value after the change are compared with each other and a command for stopping the motor is generated in accordance with a result of this comparison. A brake is applied to the motor in advance by the amount of the estimated overrun so that the motor is stopped at a desired target position after making overrun. Further, velocity setting signals are generated in accordance with desired acceleration and deceleration characteristics and the velocity control of the motor is effected in an open loop in response to the velocity setting signals. By the stop and velocity controls of an open loop system, positioning control of the motor of the open loop system can be accurately performed.
    • 检测电动机的旋转位置,速度和加速度,并且根据检测到的速度和加速度来估计电动机停止时产生的超限量,并且电动机位置检测数据和定位目标值中的至少一个被改变 按照估计的超限量。 将位置检测数据和变更后的定位目标值进行比较,根据该比较的结果生成停止电动机的指令。 预先向电动机施加制动以推定超限量,使得在超速运行之后电动机停止在期望的目标位置。 此外,根据期望的加速和减速特性产生速度设定信号,并且马达的速度控制响应于速度设定信号在开环中进行。 通过开环系统的停止和速度控制,可以准确地执行开环系统的电动机的定位控制。
    • 10. 发明授权
    • System for restoring numerically controlled machine tool to former
condition
    • 将数控机床恢复到前一种状态的系统
    • US4484287A
    • 1984-11-20
    • US304903
    • 1981-09-23
    • Gotaro GamoMitsuo Kinoshita
    • Gotaro GamoMitsuo Kinoshita
    • G05B9/02G05B19/406G06F15/46G05B19/18
    • G05B19/406G05B2219/37154G05B2219/37473G05B2219/37486G05B2219/50083G05B2219/50084G05B2219/50097
    • A system for restoring a numerically controlled machine tool to its former condition after a power interruption, the numerical control system being of the type in which a position sensor senses the current position of a movable member or of a drive motor of the machine tool and generates a current position signal in accordance with said current position, the movable member being positioned on the basis of a commanded position signal and the current position signal. The positional control information which prevails immediately prior to an interruption in the electric power which is applied to the machine tool and to the numerical control device is stored in a non-volatile memory before the power interruption occurs. When the electric power is reintroduced, the positional control information is read out of the non-volatile memory, and the movable member is returned to the position which it occupied immediately prior to the power interruption, this being accomplished on the basis of the positional control information and the current position signal.
    • 一种用于在电力中断之后将数控机床恢复到其前一状态的系统,数字控制系统是位置传感器感测机床的可动构件或驱动电机的当前位置并产生的类型 根据所述当前位置的当前位置信号,基于命令位置信号和当前位置信号来定位可移动部件。 在电力中断发生之前,将施加到机床和数控装置的电力中断之前的位置控制信息存储在非易失性存储器中。 当重新引入电力时,从非易失性存储器中读出位置控制信息,并且可移动部件返回到其在电力中断之前立即占据的位置,这是基于位置控制 信息和当前位置信号。