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    • 2. 发明授权
    • Precision servo control system for a pneumatic actuator
    • 用于气动执行机构的精密伺服控制系统
    • US06523451B1
    • 2003-02-25
    • US09699039
    • 2000-10-27
    • Chen-Fu LiaoPaul B. GladenKeith Hochhalter
    • Chen-Fu LiaoPaul B. GladenKeith Hochhalter
    • F15B909
    • F15B15/12F15B9/09F15B9/14F15B15/082F15B2211/3057
    • A precision servo control system for a pneumatic actuator has a piston positionable over a stroke of the pneumatic actuator using a supply of pressurized gas. A brake and a sensor system are connected to the actuator and to the servo control system. The servo control system operates to initiate the forward thrust from the pressurized gas to move the piston along the stroke. When a braking point along the stroke is determined, the servo control system initiates a reverse thrust from the pressurized gas while maintaining the forward thrust and simultaneously begins to selectively apply the brake to stop the piston within a predetermined tolerance of a desired stopping position. The precision servo control system is easily programmable in a manner similar to that of a control system for electrical actuators. The precision servo control system can maintain the predetermined tolerance even under changing loads, long stroke lengths or vertically oriented stroke directions. The precision control servo system preferably utilizes simple directional valves, instead of complex and expensive servo valves, to regulate the pressurized gas. The precision servo control system achieves positional accuracy to a predetermined tolerance that is a fixed value, regardless of the stroke length.
    • 用于气动致动器的精密伺服控制系统具有可使用加压气体供应的气动执行机构的行程定位的活塞。 制动器和传感器系统连接到执行器和伺服控制系统。 伺服控制系统用于启动来自加压气体的向前推力以沿着行程移动活塞。 当确定沿行程的制动点时,伺服控制系统在保持向前推力的同时开始加压气体的反向推力,同时开始选择性地施加制动器以将活塞停止在期望停止位置的预定公差范围内。 精密伺服控制系统以类似于用于电动执行器的控制系统的方式易于编程。 即使在变化的负载,长行程长度或垂直取向的行程方向上,精密伺服控制系统也能够保持预定的公差。 精密控制伺服系统优选地使用简单的方向阀而不是复杂和昂贵的伺服阀来调节加压气体。 精密伺服控制系统将位置精度达到固定值的预定公差,而与行程长度无关。
    • 8. 发明申请
    • Heartstation Remote Monitor System
    • US20190111272A1
    • 2019-04-18
    • US15787412
    • 2017-10-18
    • Keith Hochhalter
    • Keith Hochhalter
    • A61N1/39
    • An automated external defibrillator (AED) and AED Monitoring system made up of an AED, the AED having a self-diagnostic subroutine and performing said subroutine at regular intervals, the AED having at least an audio indicator that indicates the results of the self-diagnostic when the diagnosis is that the AED is in need of maintenance and a remote AED monitoring system, the AED monitoring system having an electromagnetic coil, microphone, battery, microprocessor, and wireless communication device, wherein the microprocessor selectively powers up the AED monitoring system prior to the AED's self-diagnostic subroutine and utilizes the electromagnetic coil and microphone to monitor for the AED's audio indicator that the AED is in need of maintenance, and the microprocessor transmitting a wireless signal through the wireless communication device indicating whether the AED is in need of maintenance; the microprocessor selectively powering down the AED monitoring system after transmitting the wireless signal.