公开(公告)号：US4775833A

公开(公告)日：1988-10-04

申请号：US915185

申请日：1986-10-03

申请人： Ermi Roos ,  Wallace H. Coulter

发明人： Ermi Roos ,  Wallace H. Coulter

IPC分类号： G01N15/12 ,  G01N27/02 ,  G01N27/00

CPC分类号： G01N15/1227 ,  G01N2015/1281

摘要： A debris detector for a particle counter, such as a blood cell counter, of the COULTER (R) type. When a particle, or transient debris, passes through the sensing orifice of the particle detector, a voltage pulse occurs; whereas, when debris lodges in or against the orifice of the particle detector, a d.c. voltage shift occurs. The voltage at the orifice is capacitively coupled to an amplifier and the output of the amplifier is integrated. The capacitor coupling the orifice voltage to the amplifier causes an undershoot voltage at the trailing edge of each particle or transient debris pulse, such that a zero average voltage is applied to and, hence, from the amplifier for each voltage pulse. The integrated voltage is applied to a voltage comparator to provide an output signal therefrom whenever the integrated voltage exceeds a reference voltage. The comparator output signal is provided to a delay circuit having a delay related to the time required for a particle to pass through the COULTER detector orifice. If the comparator signal remains after the delay time, a debris alarm signal is provided. This occurs only if a d.c. voltage shift had occurred, since there is no trailing edge, and hence no undershoot to return the integrated voltage to zero prior to the delay time.

摘要翻译： 用于粒子计数器的碎片检测器，例如COULTER类型的血细胞计数器。 当颗粒或瞬态碎片通过颗粒检测器的感应孔时，会发生电压脉冲; 而当碎屑落入或抵靠颗粒检测器孔口时， 发生电压偏移。 孔口处的电压电容耦合到放大器，并且放大器的输出被集成。 将孔口电压耦合到放大器的电容器在每个粒子的后沿引起下冲电压或瞬态碎片脉冲，使得零平均电压被施加到每个电压脉冲的放大器，并且因此对于每个电压脉冲施加于放大器。 当积分电压超过参考电压时，积分电压被施加到电压比较器以提供输出信号。 比较器输出信号被提供给具有与颗粒通过COULTER检测器孔所需的时间有关的延迟的延迟电路。 如果比较器信号保持在延迟时间之后，则提供碎片报警信号。 这种情况只有在d.c. 发生电压偏移，因为没有后沿，因此在延迟时间之前没有下冲将积分电压返回到零。

公开(公告)号：US07288219B1

公开(公告)日：2007-10-30

申请号：US11512843

申请日：2006-08-30

申请人： Ermi Roos

发明人： Ermi Roos

IPC分类号： H01B1/00

CPC分类号： G01N15/12 ,  G01N2015/1087

摘要： Improvements to the electrical sensing zone instrument are described that allow the good accuracy of this type of instrument to be applied to the measurement of the size of particles of carbon black. The improvements include a concentrated aqueous electrolyte containing KI or NaI, a surfactant soluble in the electrolyte capable of dispersing particles of carbon black, and an anode electrode that is made of silver at the surface touching the electrolyte. The silver anode electrode prevents the degradation of the electrolyte by light and electrolysis.

摘要翻译： 描述了对电传感区域仪器的改进，其允许将这种类型的仪器的良好精度应用于测量炭黑颗粒的尺寸。 该改进包括含有KI或NaI的浓缩的含水电解质，可溶于电解质的可分散炭黑的表面活性剂的表面活性剂和在与电解质接触的表面处由银制成的阳极电极。 银阳极电极通过光和电解来防止电解质的劣化。

公开(公告)号：US4350292A

公开(公告)日：1982-09-21

申请号：US107704

申请日：1979-12-27

申请人： Ian D. Gilbert ,  Michael T. Halloran ,  Ermi Roos

发明人： Ian D. Gilbert ,  Michael T. Halloran ,  Ermi Roos

IPC分类号： B01J8/00 ,  B65G31/04 ,  G01N15/12 ,  B05B17/04

CPC分类号： B65G31/04 ,  B01J8/002 ,  G01N15/1209

摘要： A centrifugal feeder includes a cylindrical feeder disc having an upwardly inclined uniform surface which is designed to expel particles placed thereon in a predetermined fashion by centrifugal force. The upwardly inclined surface of the disc may be designed to have a first predetermined expulsion rate which is the initial speed at which the disc must be rotated to expel any of the particles from the surface thereof. The disc also may be designed to have a final expulsion rate at which all particles placed on the surface thereof are expelled. The disc is rotated at a controlled rate of speed and at a controlled rate of change of speed to expel the particles in the manner desired in a linear or non linear fashion. The feed or expulsion rate of the particles is determined by the design of the disc and the rotation speed of the disc and essentially is independent of the size and density of the particles and the viscosity of the surrounding fluid in which the disc is rotated.

摘要翻译： 离心给料器包括具有向上倾斜的均匀表面的圆柱形进料盘，其设计成通过离心力以预定方式排放放置在其上的颗粒。 盘的向上倾斜表面可以被设计成具有第一预定排出速率，其是盘必须旋转的初始速度，以从其表面排出任何颗粒。 盘也可以被设计成具有放置在其表面上的所有颗粒的最终排出速率。 盘以受控的速度旋转并且以受控的速度变化的速度旋转，以按线性或非线性方式将粒子排出。 颗粒的进料或排出速率通过盘的设计和盘的旋转速度来确定，并且基本上与颗粒的尺寸和密度以及盘旋转的周围流体的粘度无关。

公开(公告)号：US07420360B1

公开(公告)日：2008-09-02

申请号：US11329829

申请日：2006-01-12

申请人： Ermi Roos

发明人： Ermi Roos

IPC分类号： G01N27/00

CPC分类号： G01N15/1218

摘要： An improved electrical sensing zone apparatus and method for counting and measuring size of particles suspended in a diluted electrolytic solution. The apparatus includes an aperture that is optimized with the use of double or single tapered shapes that approximate a hyperboloid of one sheet. The flow rate is selectably controlled to maintain a sufficiently low Reynolds number to avoid boundary layer separation effects that cause noise and consequently low sensitivity. By measuring statistical moments within the aperture, an approximation of the distribution of particle sizes is achieved.

摘要翻译： 一种用于对悬浮在稀释电解液中的颗粒的尺寸进行计数和测量的改进的电感区设备和方法。 该装置包括利用近似一张双曲面的双或者单个锥形形状来优化的孔。 可选择地控制流量以保持足够低的雷诺数，以避免引起噪声和因此低灵敏度的边界层分离效应。 通过测量孔径内的统计矩，实现了粒子分布的近似。

公开(公告)号：US4481466A

公开(公告)日：1984-11-06

申请号：US203122

申请日：1980-11-03

申请人： Ermi Roos ,  Robert L. Talbert

发明人： Ermi Roos ,  Robert L. Talbert

IPC分类号： G01N15/12 ,  G01N27/00

CPC分类号： G01N15/1227

摘要： An amplifier circuit having an input circuit of resistance and capacitance which is a.c. coupled to a source of pulses, and a feedback circuit of resistance and capacitance. The RC time constants of the input and the feedback circuits are made to be approximately equal at the time of pulse input in order to insure an output pulse flat base line without undershoot or overshoot.

摘要翻译： 具有电阻和电容的输入电路的放大器电路，其为直流电。 耦合到脉冲源，以及电阻和电容的反馈电路。 输入和反馈电路的RC时间常数在脉冲输入时大致相等，以确保输出脉冲平坦的基线而没有下冲或过冲。