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    • 1. 发明授权
    • Servo control system for the positioning of an apparatus
    • 用于定位装置的伺服控制系统
    • US4341986A
    • 1982-07-27
    • US227311
    • 1981-01-22
    • George B. Browder
    • George B. Browder
    • G05B19/35G05D3/14G05B5/01
    • G05B19/353G05D3/1463G05B2219/37462G05B2219/41477
    • A servo control system for the positioning of a projector comprising a dit current motor having the projector connected to the shaft of the motor, and a digital computer for providing command signals to move the projector to a programmed position at a programmed velocity within a predetermined time period. A potentiometer produced an electrical signal indicative of the actual position of the projector, and a tachometer produces an electrical signal indicative of the actual velocity of the projector. Feedback means, in turn, provides a position error signal indicative of the difference between the programmed position and the actual position of the projector, provides a velocity error signal indicative of the difference between the programmed velocity and the actual velocity of the projector, and varies, in response to the position and velocity error signals, the voltage level of the command signal such that the projector will attain the programmed position within the predetermined time period. A forward feed servo enhancer generates, in response to the command signals, a forward feed enchancement signal which when combined with the command signals will reduce the velocity error signal to approximately zero volts. This, in turn, allows the direct current motor, and thus the projector to respond to command signals at frequency rates not to exceed a predetermined frequency.
    • 一种用于定位投影仪的伺服控制系统,包括具有连接到电动机的轴的投影仪的直流电动机,以及数字计算机,用于提供命令信号,以在预定时间内以编程速度将投影仪移动到编程位置 期。 电位器产生指示投影仪的实际位置的电信号,并且转速计产生指示投影仪的实际速度的电信号。 反馈意味着反过来提供表示编程位置与投影仪实际位置之差的位置误差信号,提供指示编程速度与投影仪实际速度之差的速度误差信号,并且变化 响应于位置和速度误差信号,命令信号的电压电平使得投影仪将在预定时间段内达到编程位置。 正向进给伺服增强器响应于命令信号产生正向进给加速信号,当与指令信号组合时,该进给加速信号将将速度误差信号减小到大约零伏特。 这又允许直流电动机,并且因此投影仪以不超过预定频率的频率响应命令信号。
    • 2. 发明授权
    • Digital to analogue converter
    • 数字到模拟转换器
    • US3790875A
    • 1974-02-05
    • US3790875D
    • 1971-11-24
    • AUTOFLOW ENG LTD
    • CRAXTON R
    • B24B13/04G05B19/18H03M1/00G05B11/14
    • G05B19/188B24B13/043G05B2219/33268G05B2219/41477H03M1/48
    • A lens generating machine is provided with electrical digital to analogue converters for controlling various functions of the machine, the converters each including a specially-wound transformer provided on a secondary winding thereof with tapping points corresponding to digital control instructions concerning various lens optical parameters associated with said machine functions, operation of the machine being controlled through switch means for selectively effecting connection to said tappings to make available voltages which are the analogue equivalents of the corresponding control instructions and which are utilised to effect the necessary machine functions to produce a lens with the desired optical characteristics, for example, a toric lens.
    • 镜头发生机具有用于控制机器的各种功能的电子数模转换器,转换器各自包括设置在次级绕组上的专用绕组变压器,该分接点与数字控制指令相对应,该数字控制指令涉及与 所述机器功能,通过开关装置控制机器的操作,用于选择性地实现与所述触发器的连接,以产生作为相应控制指令的模拟等同物的可用电压,并且其用于实现必要的机器功能以产生具有 所需的光学特性,例如复曲面透镜。
    • 4. 发明授权
    • Method and apparatus for controlling an automation along a predetermined path
    • 用于沿着预定路径控制自动化的方法和装置
    • US3909600A
    • 1975-09-30
    • US36438173
    • 1973-05-31
    • CINCINNATI MILACRON INC
    • HOHN RICHARD EDWARD
    • B25J9/16B25J9/18G05B19/4093G05B19/4103G05B19/416G05B19/42B25J9/00G06F15/46
    • B25J9/161B25J9/1651G05B19/416G05B2219/33099G05B2219/35354G05B2219/35543G05B2219/41477G05B2219/43006G05B2219/45051
    • A method and apparatus for controlling a function element of an automaton at a predetermined velocity and acceleration along a predetermined path in space between two predetermined points. The automaton has a plurality of axes of motion, at least one of which is an axis of rotary motion for moving a function element along the predetermined path. The automaton has other axes of motion for controlling the orientation of the function element in a predetermined manner while said element is moving from one position to another position. From an input, signals are generated representing the predetermined velocity and rectangular coordinate values of end points of the predetermined path; and the disclosed apparatus is operative on a fixed time basis to iteratively calculate a number of incremental displacements. Coordinate values defining each of the increments are calculated, and these coordinate values are transformed into corresponding generalized coordinate values defined by the geometric configuration of the automaton. A servomechanism drive circuit is responsive to output signals representing changes in the generalized coordinate values along each incremental displacement for causing actuators on the automaton to move proportionally. Hence, the automaton is moved at a predetermined velocity along the predetermined path.
    • 一种用于以预定速度和加速度沿着两个预定点之间的空间中的预定路径来控制自动机的功能元件的方法和装置。 自动机具有多个运动轴,其中至少一个是沿着预定路径移动功能元件的旋转运动轴。 自动机具有其它运动轴,用于在所述元件从一个位置移动到另一个位置时以预定的方式控制功能元件的定向。 从输入中产生表示预定路径的端点的预定速度和直角坐标值的信号; 并且所公开的装置在固定的时间基础上操作以迭代地计算增量位移的数量。 计算定义每个增量的坐标值,并将这些坐标值转换为由自动机的几何配置定义的相应的广义坐标值。 伺服机构驱动电路响应于表示沿着每个增量位移的广义坐标值的变化的输出信号,以使自动机上的致动器成比例地移动。 因此,自动机沿预定路径以预定速度移动。