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    • 2. 发明授权
    • Precision dispensing system
    • 精密分配系统
    • US5746241A
    • 1998-05-05
    • US531210
    • 1995-09-19
    • David Stedman
    • David Stedman
    • G05D11/13
    • G05D11/132Y10T137/2531
    • A microprocessor controlled precision dispensing system (PDS) introduces an additive into a flowing liquid. A fixed amount of additive is introduced per unit volume of the liquid. The fixed amount can be changed by the user and can be varied as a function of an external parameter. The PDS includes a dispensing device which is actuated by a flow meter. The liquid flows through the flow meter which includes a Hall effect transducer which measures flow rate. The signal from the Hall effect transducer is input into a microprocessor mounted in the dispensing device. The microprocessor controls a stepper motor which drives a crankshaft which drives a reciprocating pump. The release of the additive is correlated to the volume of liquid flow. The dispensing device includes means for selecting the amount of additive to be dispensed per gallon of liquid. For example, the system can be set to dispense an amount from 0-10 ml/gal; this amount can be changed by increments of 0.01 ml. Also included are means to accumulate the total amount of additive dispensed. The microprocessor can also be programmed to vary the amount dispensed as a function of some external parameter.
    • 微处理器控制的精密分配系统(PDS)将添加剂引入流动的液体中。 每单位体积的液体引入固定量的添加剂。 固定量可以由用户改变,并且可以根据外部参数而变化。 PDS包括由流量计致动的分配装置。 液体流过包括测量流量的霍尔效应传感器的流量计。 来自霍尔效应传感器的信号被输入到安装在分配装置中的微处理器中。 微处理器控制驱动曲轴的步进马达驱动往复泵。 添加剂的释放与液体流量的相关。 分配装置包括用于选择每加仑液体要分配的添加剂的量的装置。 例如,可以将系统设定为分配0-10ml / gal的量; 该量可以通过0.01ml的增量来改变。 还包括累积添加剂总量的装置。 微处理器也可以被编程为根据一些外部参数来改变分配的量。
    • 8. 发明授权
    • Tape motion control for reel-to-reel drive
    • 卷轴到卷轴驱动的胶带运动控制
    • US4125881A
    • 1978-11-14
    • US798539
    • 1977-05-19
    • John J. EigeArvind M. PatelSpencer D. RobertsDavid Stedman
    • John J. EigeArvind M. PatelSpencer D. RobertsDavid Stedman
    • G11B15/43B65H23/18G11B15/46G11B15/48G11B15/54G11B27/13G11B5/09G03B1/04
    • G11B15/48G11B15/54G11B27/13G11B2220/90
    • High tape acceleration rates are achieved in an unbuffered, capstanless tape drive system by a tape motion control apparatus employing separate drive motors for each reel of a reel-to-reel tape transport. Tape moves from one reel past a read/write head and a tape tension sensor to the other reel, there being no tachometer in the tape feed path. A tachometer on one reel shaft provides a large number of pulses per revolution which pulses are counted by a counter; and a tachometer on the other reel shaft provides only one pulse per revolution, which pulse gates out the count then accumulated in the counter for actuating means to provide motor acceleration currents of a magnitude corresponding to said accumulated count according to a predetermined servo algorithm for controlling rotation of both reels. A tape radius constant corresponding to the actual length and thickness of tape in the system is calculated during initial wrap of tape onto the takeup reel. Tension is tightly controlled by an analog tension sensor and servo system.
    • 通过带式运动控制装置在无缓冲的无卷轴磁带驱动系统中实现高的磁带加速速率,该磁带运动控制装置对于卷轴到卷轴磁带传输的每个卷轴使用单独的驱动马达。 磁带从一个卷轴移动通过读/写头和磁带张力传感器到另一卷轴,磁带馈送路径中没有转速表。 一个卷轴上的转速表每转提供大量脉冲,这些脉冲由计数器计数; 而另一个卷轴上的转速表仅提供每转一个脉冲,该脉冲将计数累加在计数器中,用于致动装置,以根据预定的伺服算法提供对应于所述累加计数的电动机加速电流,以控制 两个卷轴的旋转。 在将带子初始卷绕到收紧卷轴上时,计算对应于系统中的带的实际长度和厚度的带半径常数。 张力由模拟张力传感器和伺服系统严格控制。