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    Speed up circuit in an apparatus for measuring a dividing particle size of a particulate system
    1.
    发明授权
    Speed up circuit in an apparatus for measuring a dividing particle size of a particulate system 失效
    用于测量颗粒系统的分散粒度的装置中的加速电路

    公开(公告)号：US3894221A

    公开(公告)日：1975-07-08

    申请号：US44726474

    申请日：1974-03-01

    Applicant: COULTER ELECTRONICS

    Inventor： FIGUEROA DAVID R ,  DOTY EDWARD NEAL ,  MARINO ANTHONY

    IPC: G01N15/12 ,  G06G7/186 ,  H03K3/351 ,  H03K7/06 ,  G06G7/12 ,  G01N27/00

    CPC classification number: H03K3/351 ,  G01N15/1227 ,  G06G7/1865 ,  H03K7/06

    Abstract: A speed-up circuit in an apparatus for measuring a dividing particle size of a particulate system operates to give greater weight to the particle size of particles sensed shortly after system initiation as compared to particles sensed a substantial period of time after system initiation. This increases the speed at which the system moves from an initial or reference setting towards the desired particle size above and below which size predetermined fractions of the total mass of the particulate system are respectively included.

    Abstract translation: 用于测量颗粒系统的分散粒度的装置中的加速电路操作，以便在系统启动后不久感测到的颗粒的粒度比在系统启动后相当长的一段时间内感测到的颗粒更大的重量。 这增加了系统从初始或参考设置移动到高于和低于该尺寸的所需颗粒尺寸的速度，该尺寸分别包括颗粒系统的总质量的预定分数。

    Particle analyzing method and apparatus having pulse amplitude modification for particle volume linearization
    4.
    发明授权
    Particle analyzing method and apparatus having pulse amplitude modification for particle volume linearization 失效
    颗粒分析方法和装置用于粒子体积线性化的脉冲幅度修正

    公开(公告)号：US3863159A

    公开(公告)日：1975-01-28

    申请号：US35788873

    申请日：1973-05-07

    Applicant: COULTER ELECTRONICS

    Inventor： COULTER WALLACE H ,  DOTY EDWARD NEAL

    IPC: G01N15/12 ,  H03K5/01 ,  H03K5/20

    CPC classification number: H03K5/01 ,  G01N15/1227

    Abstract: The amplitude of each of the pulses derived from a Coulter type of electronic particle analyzer is modified to compensate for amplitude error that results when the particle traverses nonuniform field portions of the scanning aperture path of the particle analyzer. By measuring the pulse amplitude at its center point and at two ''''shoulder'''' points located on opposite sides of the center point, a summing and comparison involving the pulse amplitudes at these three points is developed which effectively generates a modified pulse amplitude at the time of the center amplitude. The thus modified center amplitude is a more accurate measure of the volume of each particle and there results an improved linearizing of the particle volume pulse amplitude relationship which enhances the resolution of particle sizing data.

    Abstract translation: 修改从库尔特型电子粒子分析仪得到的每个脉冲的振幅，以补偿当粒子穿过粒子分析仪的扫描孔径路径的不均匀场部分时产生的振幅误差。 通过测量其中心点和位于中心点相对侧的两个“肩”点处的脉冲幅度，开发了涉及这三个点处的脉冲幅度的求和和比较，其有效地产生修正的脉冲幅度 中心振幅。 这样改变的中心幅度是每个粒子的体积的更精确的测量，并且导致粒子体积脉冲幅度关系的线性化改善，这增强了粒子尺寸数据的分辨率。

    5.
    发明专利
    未知

    公开(公告)号：DE2508781A1

    公开(公告)日：1975-09-04

    申请号：DE2508781

    申请日：1975-02-28

    Applicant: COULTER ELECTRONICS

    Inventor： FIGUEROA DAVID RICHARD ,  DOTY EDWARD NEAL ,  MARINO ANTHONY

    IPC: G01N15/12 ,  G06G7/186 ,  H03K3/351 ,  H03K7/06 ,  G01N15/02

    Abstract: A speed-up circuit in an apparatus for measuring a dividing particle size of a particulate system operates to give greater weight to the particle size of particles sensed shortly after system initiation as compared to particles sensed a substantial period of time after system initiation. This increases the speed at which the system moves from an initial or reference setting towards the desired particle size above and below which size predetermined fractions of the total mass of the particulate system are respectively included.

    6.
    发明专利
    未知

    公开(公告)号：DE2421265A1

    公开(公告)日：1974-11-28

    申请号：DE2421265

    申请日：1974-05-02

    Applicant: COULTER ELECTRONICS

    Inventor： COULTER WALLACE HENRY ,  DOTY EDWARD NEAL

    IPC: G01N15/12 ,  H03K5/01 ,  G01N15/02

    Abstract: The amplitude of each of the pulses derived from a Coulter type of electronic particle analyzer is modified to compensate for amplitude error that results when the particle traverses non-uniform field portions of the scanning aperture path of the particle analyzer. By measuring the pulse amplitude at its center point and at two "shoulder" points located on opposite sides of the center point, a summing and comparison involving the pulse amplitudes at these three points is developed which effectively generates a modified pulse amplitude at the time of the center amplitude. The thus modified center amplitude is a more accurate measure of the volume of each particle and there results an improved linearizing of the particle volume pulse amplitude relationship which enhances the resolution of particle sizing data.

    8.
    发明专利
    未知

    公开(公告)号：DE2449321A1

    公开(公告)日：1975-04-30

    申请号：DE2449321

    申请日：1974-10-16

    Applicant: COULTER ELECTRONICS

    Inventor： COULTER WALLACE HENRY ,  HOGG WALTER ROBERT ,  DOTY EDWARD NEAL ,  LONGMAN JUN MILLARD DUMAS ,  CAMPBELL STEPHEN KENNEDY

    IPC: G01N15/12 ,  H03K21/02 ,  G01N15/00 ,  G06M11/00

    Abstract: A method and apparatus for correcting a particle pulse count subject to coincidence error is disclosed wherein particle pulses, developed in response to passage of particles in a particulate system through a sensing zone, are counted for a predetermined period of time. The predetermined period of time is increased or extended in response to each pulse counted by a time increment that is a function of a characteristic of the counted pulse, such as the pulse width, duration, or amplitude. The total additional time period allows the counting of additional particle pulses such that the total count at the end of the extended time period is an error corrected count for the number of particles detected in the predetermined time period.

    9.
    发明专利
    未知

    公开(公告)号：DE2421824A1

    公开(公告)日：1974-12-05

    申请号：DE2421824

    申请日：1974-05-06

    Applicant: COULTER ELECTRONICS

    Inventor： DOTY EDWARD NEAL

    IPC: G01N15/12 ,  H03K5/1532 ,  G01R29/02 ,  G01N15/02

    Abstract: The pulses produced by a Coulter type of electronic particle analyzer having a scanning aperture have amplitudes proportional to the particle volumes; hence, random in amplitude. The pulses are variably asymmetric due to the particle scanning aperture and particle flow arrangement. The most reliable measure of particle volume is pulse amplitude at the time when the particle is halfway through the scanning aperture path. By attenuating each pulse to the same predetermined percentage of its amplitude and comparing the attenuated signal level with the original pulse in two different time spaced channels, there results two equal rectangular time-spaced pulses that separately then are integrated and compared. If the integration durations are equal, but one integral signal is attenuated to one half, then the two time-spaced integral signals will have equal amplitudes at the time center of the rectangular pulse, the symmetric time center of the original pulse. Adjustment of the slope of integration and/or attenuation of one integral signal can shift the time position. In this manner the amplitude of the particle-pulse can be strobed at its aperture path center time.

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