公开(公告)号：US4407193A

公开(公告)日：1983-10-04

申请号：US159702

申请日：1980-06-16

申请人： David A. Hall ,  George P. Olson

发明人： David A. Hall ,  George P. Olson

IPC分类号： B41J1/30 ,  B41J9/44 ,  B41J9/48 ,  G06K15/08 ,  B41J7/92

CPC分类号： B41J9/48

摘要： In an impact printer including a print wheel having a plurality of selectable character type bearing elements for respectively printing a plurality of characters, said print wheel being rotatable for selectively positioning selected type elements in successive print positions, impact means impellable against the selected elements to drive said elements against the printing medium and means for impelling the impact means against said selected type element, the present invention provides the improvement comprising the combination of means for sensing the flight time of the impelled impact means until impact by sensing variations in the velocity of said impact means, means for comparing the sensed flight time to a predetermined ideal flight time, and means for selectively varying the amplitude of the current to the impelling means to adjust the sensed flight time to equal the ideal flight time.

摘要翻译： 在包括具有用于分别打印多个字符的多个可选择字符型承载元件的打印轮的冲击打印机中，所述打印轮可旋转，以便选择性地将所选择的类型元件定位在连续的打印位置，冲击装置能够抵靠所选择的元件驱动 相对于打印介质的所述元件以及用于将冲击装置推向所述选定型元件的装置，本发明提供了改进，其包括用于感测推进的冲击装置的飞行时间直到冲击的装置的组合， 冲击装置，用于将感测的飞行时间与预定的理想飞行时间进行比较的装置，以及用于选择性地改变到推进装置的电流的振幅以将感测的飞行时间调整到等于理想飞行时间的装置。

公开(公告)号：US4286202A

公开(公告)日：1981-08-25

申请号：US57777

申请日：1979-07-16

申请人： Douglas E. Clancy ,  Richard F. Frankeny ,  George P. Olson

发明人： Douglas E. Clancy ,  Richard F. Frankeny ,  George P. Olson

IPC分类号： H02P8/12 ,  H02P8/32 ,  H02P25/08 ,  G05B19/40

CPC分类号： H02P8/32

摘要： A damping control system for a three phase stepper motor. A reluctance velocity transducer is used for each of the three phases. The output of each of the transducers is proportional to the rotational velocity of the motor. Each of the transducers is rotationally phase shifted 3.75 with respect to one another and phased to the motor rotor rotationally such that the zero voltage crossings of the transducers correspond to the zero torque crossings of the motor. During damping or detenting of the motor the selected phase has current applied to it which is equal to a predetermined fixed value plus the feedback from its associated transducer. The windings on each side of the detent position have current applied to them which is proportional to the voltage from their respective feedback transducers. The voltage in each of the windings is amplified by a selected gain constant. The current in each of the windings is such that maximum torque is applied to drive the motor to the detent position with appropriate current reversals in the windings to damp out any kinetic energy in the rotor during detenting.

摘要翻译： 三相步进电机的阻尼控制系统。 三相中的每一个都使用磁阻速度传感器。 每个换能器的输出与马达的旋转速度成比例。 每个换能器相对于彼此旋转相移3.75，并且旋转地定相到电动机转子，使得换能器的零电压交叉对应于电动机的零转矩交叉。 在电动机的阻尼或制动期间，所选择的相位具有施加到其上的电流，其等于预定的固定值加上来自其相关的换能器的反馈。 定位位置的每一侧的绕组具有施加到它们的电流，这些电流与它们各自的反馈换能器的电压成比例。 每个绕组中的电压被放大一个选定的增益常数。 每个绕组中的电流使得施加最大扭矩以通过绕组中的适当的电流反转将电动机驱动到制动位置，以在制动期间消除转子中的任何动能。

公开(公告)号：US5904833A

公开(公告)日：1999-05-18

申请号：US704284

申请日：1996-08-28

申请人： Calvin O. Huber ,  George P. Olson

发明人： Calvin O. Huber ,  George P. Olson

IPC分类号： G01N27/28 ,  G01N27/403 ,  G01N27/404

CPC分类号： G01N27/4035 ,  G01N27/283

摘要： A method and apparatus for measuring the content of carbon dioxide in an aqueous medium, particularly boiler condensate from an electrical power plant. The apparatus comprises a container or housing defining an elongated vertical indicator chamber and a parallel vertical reference chamber which are connected by a generally horizontal passage. An indicator electrode and a reference electrode are mounted in the indicator chamber and reference chamber, respectively. The lower end of the indicator chamber is open, and the open end is enclosed by a membrane of microporous polytetrafluoroethylene. The lower end of the indicator electrode is flat or planar and is located in close proximity to the inner face of the membrane. A filling liquid consisting of pure water is located within both chambers in contact with the respective electrodes. The apparatus can be mounted in a condensate bleed line of a power plant. The condensate in the bleed line is in initially adjusted in pH to a value of about 4.5 and then is flowed in contact with the outer face of the membrane. Carbon dioxide in the condensate will diffuse through the membrane to provide a differential in electrical potential, which serves as a measurement of the carbon dioxide content.

摘要翻译： 一种用于测量水性介质中的二氧化碳含量的方法和装置，特别是来自发电厂的锅炉冷凝水。 该装置包括限定细长垂直指示器室和平行垂直参考室的容器或壳体，其通过大致水平的通道连接。 指示器电极和参考电极分别安装在指示器室和参考室中。 指示器室的下端开放，开口端由微孔聚四氟乙烯膜包围。 指示器电极的下端是平坦的或平坦的，并且位于膜的内表面附近。 由纯水组成的填充液体位于与相应电极接触的两个室内。 该装置可以安装在发电厂的冷凝物排放管线中。 排出管中的冷凝物最初在pH调节至约4.5的值，然后与膜的外表面接触流动。 冷凝物中的二氧化碳将通过膜扩散以提供电位差，其用作二氧化碳含量的测量值。

公开(公告)号：US5886429A

公开(公告)日：1999-03-23

申请号：US989192

申请日：1997-12-11

申请人： W. Mack Grady ,  Ricardo Chan ,  Gregorio C-Y Chung ,  David Gerez ,  William Blane Leuschner ,  George P. Olson

发明人： W. Mack Grady ,  Ricardo Chan ,  Gregorio C-Y Chung ,  David Gerez ,  William Blane Leuschner ,  George P. Olson

IPC分类号： G01R31/00 ,  G01R19/165

CPC分类号： G01R31/001 ,  Y10T307/826

摘要： A computer controllable testing and monitoring station forms short-term intervals of simulated alternating current power level disturbance, either undervoltage (sag) or overvoltage (swell). The station forms the short term voltage sags or swells so that their effects on sensitive equipment can be measured. The starting point of the sag or swell disturbance, as well as the time duration of the disturbance, can be accurately controlled.

摘要翻译： 计算机可控测试和监测站形成模拟交流功率电平干扰（欠压（下垂）或过压（膨胀））的短期间隔。 该站形成短期电压骤降或膨胀，从而可以测量其对敏感设备的影响。 可以精确地控制下垂或膨胀扰动的起点以及扰动的持续时间。