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    • 1. 发明公开
    • Position measuring device
    • Positionsmesseinrichtung。
    • EP0407908A2
    • 1991-01-16
    • EP90112917.1
    • 1990-07-06
    • VICKERS INCORPORATED
    • Taplin, Lael B.Sagady, Calman S.
    • G01D5/48F15B15/28G01R27/04
    • F15B15/2869F15B15/28
    • An electrohydraulic control system includes an actuator (10, 70) having a cylinder (18) and a piston (22) variably positionable therewithin. An electrohydraulic valve (12) is responsive to valve control signals for coupling the actuator (10, 70) to a source (14, 16) of hydraulic fluid. A coaxial transmission line (34) extends through the actuator (10, 70), and includes an outer conductor (18) formed by the actuator cylinder and a center conductor (24, 36) operatively coupled to the piston (22), such that length of the coaxial transmission line (34) is effectively directly determined by position of the piston (22) within the cylinder (18). An rf generator (56) is coupled to the coaxial transmission line (34) for launching rf energy therewithin, and valve control electronics (28) is responsive to rf energy reflected by the coaxial transmission line (34) for indicating position of the piston (22) within the cylinder and generating electronic control signals to the valve (12). A second coaxial transmission line (48, 72) of fixed length is connected to the valve (12) or actuator (10, 70) so that the hydraulic fluid flows therethrough. The rf eneregy is launched in the second transmission line (48, 72) and generator frequency is controlled as a function of phase angle at the second transmission line.
    • 电动液压控制系统包括具有可在其中可定位的气缸(18)和活塞(22)的致动器(10,70)。 电动液压阀(12)响应于阀门控制信号,用于将致动器(10,70)耦合到液压流体源(14,16)。 同轴传输线(34)延伸穿过致动器(10,70),并且包括由致动器气缸形成的外导体(18)和可操作地联接到活塞(22)的中心导体(24,36),使得 同轴传输线(34)的长度有效地直接由活塞(22)在气缸(18)内的位置决定。 射频发生器(56)耦合到用于在其中发射能量的同轴传输线(34),并且阀控制电子器件(28)响应于由同轴传输线(34)反射的用于指示活塞位置的能量 22),并且向阀(12)产生电子控制信号。 固定长度的第二同轴传输线(48,72)连接到阀(12)或致动器(10,70),使得液压流体流过其中。 在第二传输线(48,72)中启动射频,并且发电机频率作为第二传输线处的相位角的函数被控制。
    • 3. 发明公开
    • Position measuring device
    • 位置测量装置
    • EP0407908A3
    • 1991-04-03
    • EP90112917.1
    • 1990-07-06
    • VICKERS INCORPORATED
    • Taplin, Lael B.Sagady, Calman S.
    • G01D5/48F15B15/28G01R27/04
    • F15B15/2869F15B15/28
    • An electrohydraulic control system includes an actuator (10, 70) having a cylinder (18) and a piston (22) variably positionable therewithin. An electrohydraulic valve (12) is responsive to valve control signals for coupling the actuator (10, 70) to a source (14, 16) of hydraulic fluid. A coaxial transmission line (34) extends through the actuator (10, 70), and includes an outer conductor (18) formed by the actuator cylinder and a center conductor (24, 36) operatively coupled to the piston (22), such that length of the coaxial transmission line (34) is effectively directly determined by position of the piston (22) within the cylinder (18). An rf generator (56) is coupled to the coaxial transmission line (34) for launching rf energy therewithin, and valve control electronics (28) is responsive to rf energy reflected by the coaxial transmission line (34) for indicating position of the piston (22) within the cylinder and generating electronic control signals to the valve (12). A second coaxial transmission line (48, 72) of fixed length is connected to the valve (12) or actuator (10, 70) so that the hydraulic fluid flows therethrough. The rf eneregy is launched in the second transmission line (48, 72) and generator frequency is controlled as a function of phase angle at the second transmission line.
    • 电动液压控制系统包括具有气缸(18)和可变地定位在其中的活塞(22)的致动器(10,70)。 电动液压阀(12)响应于阀控制信号以将致动器(10,70)联接到液压流体源(14,16)。 同轴传输线(34)延伸通过致动器(10,70),并且包括由致动器缸形成的外导体(18)和可操作地联接到活塞(22)的中心导体(24,36),使得 同轴传输线(34)的长度有效地由活塞(22)在气缸(18)内的位置直接确定。 射频发生器(56)耦合到同轴传输线(34)以在其中发射射频能量,并且阀控制电子器件(28)响应于由同轴传输线(34)反射的射频能量以指示活塞 22),并向阀(12)产生电子控制信号。 具有固定长度的第二同轴传输线(48,72)连接到阀(12)或致动器(10,70),使得液压流体流过其中。 射频能量在第二传输线(48,72)中发射,并且发电机频率作为第二传输线处的相位角的函数来控制。