公开(公告)号：WO0218907A3

公开(公告)日：2003-02-27

申请号：PCT/US0125005

申请日：2001-08-09

Applicant: RHEOLOGICS INC ,  KENSEY KENNETH ,  HOGENAUER WILLIAM N ,  SHIN SEHYUN ,  KIM SANGHO ,  CHO YOUNG

Inventor： KENSEY KENNETH ,  HOGENAUER WILLIAM N ,  SHIN SEHYUN ,  KIM SANGHO ,  CHO YOUNG

IPC: G01N11/00 ,  G01N11/04 ,  G01N11/06 ,  A61B5/145

CPC classification number: A61B5/02035 ,  G01N11/04

Abstract: A scanning rheometer (20) is presented for the rheological property measurement of electrorheological (ER) and magnetorheological (MR) fluids using a non-linear viscoplastic model, based on the fluid height variation with respect to time. The rheometer basically includes a static (e.g., an overhead reservoir) or a dynamic source of fluid (22), a channel or slit (28) whose sides form electrodes (26) which are in contact with the flowing ER fluid, or a capillary tube (28) exposed to a static/alternating magnetic field (26) for flowing MR fluids, a transfer tube (29), either one or two riser tubes (R1,R2), and a column level detector (32) for monitoring the column of fluid as it moves in one of the riser tubes (R2). The column level detector (32) is coupled to a processor (34) which analyzes, among other things, column height vs. time data to determine both viscosity and yield stress. The rheometer overcomes one of the major drawbacks of the conventional rheometer: the inability to produce the yield stress of the ER, or MR, fluid in an absolute zero shear rate range. The results with this rheometer are compared with those obtained from a commercially-available rheometer which indicates excellent agreement.

Abstract translation: 基于相对于时间的流体高度变化，使用非线性粘弹性模型提供扫描流变仪（20）用于电流变学（ER）和磁流变（MR）流体的流变性质测量。 流变仪基本上包括静态（例如，顶部储存器）或动态流体源（22），其侧面形成与流动的ER流体接触的电极（26）的通道或狭缝（28），或毛细管 暴露于用于流动MR流体的静态/交变磁场（26）的管（28），一个或两个提升管（R1，R2）的传输管（29）和用于监测 一列流体在其一个提升管（R2）中移动时。 列级检测器（32）耦合到处理器（34），其处理塔高度与时间数据，以确定粘度和屈服应力。 流变仪克服了常规流变仪的主要缺点之一：不能在绝对零剪切速率范围内产生ER或MR流体的屈服应力。 将该流变仪的结果与从商业可得的流变仪获得的结果进行比较，这表明出色的一致性。

公开(公告)号：WO03008936A2

公开(公告)日：2003-01-30

申请号：PCT/US0222732

申请日：2002-07-17

Applicant: RHEOLOGICS INC

Inventor： KENSEY KENNETH ,  HOGENAUER WILLIAM N ,  CHO YOUNG I ,  SHIN SEHYUN ,  KIM SANGHO

IPC: G01N11/06 ,  G01N13/02

CPC classification number: G01N11/06 ,  G01N13/02

Abstract: A method and apparatus for determining the viscosity of a non-Newtonian fluid over plural shear rates using a single capillary tube exposed to a continuously decreasing pressure differential and while minimizing the effects of surface tension of that fluid during the determination. A particular application of this method and apparatus is also provided for determining the viscosity of the blood of a living being whereby the single capillary tube initially forms a portion of a hand-held unit that obtains a portion of the circulating blood of the living being; the filled capillary tube is then ejected into an analyzer where the blood therein is exposed to the continuously decreasing pressure differential. Data is generated from the movement of the blood through the capillary tube, due to the decreasing pressure differential, and the blood viscosity is determined from that data.

Abstract translation: 一种用于使用暴露于连续降低的压力差的单个毛细管确定多个剪切速率的非牛顿流体的粘度并同时最小化在确定期间该流体的表面张力的影响的方法和装置。 还提供了该方法和装置的特定应用，用于确定生物的血液的粘度，由此单个毛细管最初形成获得生物的循环血液的一部分的手持单元的一部分; 然后将填充的毛细管喷射到其中其中的血液暴露于连续降低的压力差的分析器中。 数据是由血液通过毛细血管的运动而产生的，由于压力差减小，并且根据该数据确定血液粘度。

公开(公告)号：WO0239090A3

公开(公告)日：2003-04-10

申请号：PCT/US0143840

申请日：2001-11-06

Applicant: RHEOLOGICS INC ,  KIM SANGHO ,  SHIN SEHYUN ,  CHO YOUNG I

Inventor： KIM SANGHO ,  SHIN SEHYUN ,  CHO YOUNG I

IPC: A61B5/145 ,  A61B5/15 ,  G01N11/04 ,  G01N11/06 ,  G01N13/02

CPC classification number: G01N11/06 ,  A61B5/02035 ,  G01N11/04 ,  G01N2013/0283

Abstract: A method for isolating surface tension effects and/or yield stress of a fluidflowing in a U-shaped tube wherein one or both legs of the U-shaped tube is monitored over time for the changing height of the respective fluid columns therein. A portion of the U-shaped tube comprises a flow restrictor, e.g., a capillary tube, of known dimensions. Monitoring one or both of the moving fluid columns over time permits the viscosity determination of the fluid flowing therein over a range of shear rates from fluid column height differences. However, it is necessary to isolate the effects of surface tension and/or yield stress to obtain an accurate viscosity determination. The method provides for the surface tension effect being subtracted from the difference in fluid column heights and then any yield determining stress effect. Alternatively, the method also provides a process for determining both the surface tension effect and yield stress effect simultaneously.

Abstract translation: 用于分离表面张力效应和/或屈服在U形管中的流体流动应力的方法，其中U形管的一个或两个支腿随着时间的推移监测其中各流体柱的变化高度。 U形管的一部分包括具有已知尺寸的限流器，例如毛细管。 随着时间的推移监测一个或两个运动流体柱，可以在流体柱高度差的剪切速率范围内对其中流动的流体进行粘度测定。 然而，有必要分离表面张力和/或屈服应力的影响，以获得准确的粘度测定。 该方法提供了从流体柱高度的差异中减去表面张力效应，然后任何屈服应变效应。 或者，该方法还提供同时确定表面张力效应和屈服应力作用的方法。