KR101123960B1 - Fluid viscometer - Google Patents

Abstract

The present invention relates to a portable fluid viscosity measuring device capable of measuring the viscosity of fluids having non-Newtonian and Newtonian behavior and fluids at various shear rates. The fluid viscosity measuring apparatus according to the present invention includes a first fluid injection part into which a reference fluid having a reference viscosity is injected, a second fluid injection part into which a measurement target fluid to be measured is injected, and a first fluid injection part. And a flow resistance tube interconnecting the second fluid inlet and forming a flow path of the reference fluid and the measured fluid, and a reference fluid and a fluid to be measured which are arranged in communication with the flow resistance tube at regular intervals and flow on the flow resistance pipe flow path. And a plurality of display channel portions each receiving and displaying a flow distance of the reference fluid and the measurement target fluid. Accordingly, the display channel portions are arranged in the flow resistance tube at regular intervals to improve visibility of the flow distance between the reference fluid and the measurement target fluid, and the viscosity of the measurement target fluid can be calculated using the number ratio of the display channel portions. Accordingly, the structure can be slimmed down to improve portability.

Non-Newtonian fluid, Newtonian fluid, viscosity, shear rate, flow distance, viscosity coefficient

Description

Fluid Viscosity Measuring Device {FLUID VISCOMETER}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for measuring fluid viscosity, and more particularly, to measuring viscosity of fluids having non-Newtonian and Newtonian behavior and measuring viscosity at various shear rate conditions. A portable fluid viscosity measuring device can be provided.

The fluid viscosity measuring device for measuring the viscosity of a fluid is characterized by a drag flow type in which a shear force is generated between a fixed surface and a moving surface, and a shear force generated by a pressure difference between both ends of a pipe. It is classified into a pressure-driven flow type.

Here, generally, the fluid viscosity measuring device is widely used to measure the viscosity of blood. The fluid viscosity measuring device may calculate the viscosity coefficient of the fluid to be measured by comparing the reference fluid having a reference viscosity with the fluid to be measured, such as blood.

For example, the viscosity of the blood measured by the fluid viscosity measuring device is used as a useful data for judging a disease of the human body.

Thus, a fluid viscosity measuring device capable of diagnosing the onset or disease of a human body by measuring the viscosity of blood may be more useful in a portable manner that can be used anywhere. Of course, the portable fluid viscosity measuring device is required to be provided with a minimum driving device for reducing the size and volume.

In addition, since a fluid such as blood is a non-Newtonian fluid whose viscosity changes with a change in shear rate, a fluid viscosity measuring apparatus capable of measuring viscosity under various shear rate conditions is in demand.

Accordingly, it is an object of the present invention to provide a fluid viscosity measuring apparatus having an improved structure such that the size and volume are reduced for portable use.

It is another object of the present invention to provide a fluid viscosity measuring apparatus having an improved structure to measure the viscosity at various shear rate conditions.

The objects of the present invention are not limited to the above-mentioned objects, and other objects which are not mentioned will be clearly understood by those skilled in the art from the following description.

Means for solving the above problems include a first fluid injection part into which a reference fluid having a reference viscosity is injected, a second fluid injection part into which a measurement target fluid to be measured is injected, and the first fluid injection part and A flow resistance tube that interconnects the second fluid injection portion and forms a flow path between the reference fluid and the measurement target fluid; and the reference fluid is disposed in communication with the flow resistance tube at regular intervals and flows on the flow resistance tube flow path. And a plurality of display channel portions for receiving the fluid and the fluid to be measured, respectively, for displaying the flow distances of the reference fluid and the fluid to be measured.

The apparatus may further include a pair of valves disposed between the display channel portions adjacent to the first fluid injection portion and the second fluid injection portion to open and close the flow paths of the reference fluid and the measurement target fluid. .

It is preferable that the pair of valves simultaneously open the flow path of the flow resistance tube so that the reference fluid and the measurement target fluid flow simultaneously.

Preferably, the display channel portions may be formed in the transverse direction of the flow direction of the reference fluid and the measurement target fluid.

In addition, preferably, the viscosity of the fluid to be measured may be measured using the ratio of the number of the display channel portion through which the reference fluid and the fluid to be measured are received.

More preferably, the viscosity coefficient of the fluid to be measured may be calculated based on the following equation.

: 기준유체의 점성 계수

= Coefficient of viscosity of the reference fluid

: 측정 대상 유체의 점성 계수

= Viscosity coefficient of the fluid to be measured

: 기준유체와 유동저항관 사이의 표면장력

: Surface tension between reference fluid and flow resistance tube

: 측정 대상 유체와 유동저항관 사이의 표면장력

: Surface tension between the fluid to be measured and the flow resistance tube

: 기준유체와 유동저항관 사이의 접촉각

: Contact angle between reference fluid and flow resistance tube

: 측정 대상 유체와 유동저항과 사이의 접촉각

: Contact angle between the fluid to be measured and the flow resistance

: 기준유체를 수령하는 표시채널부의 개수

: Number of display channel sections to receive reference fluid

: 측정 대상 유체를 수령하는 표시채널부의 개수

: Number of display channel sections to receive the fluid to be measured

)과 상기 측정 대상 유체에 대한 표면장력(

) 비가 2이하인 것이 바람직하다.Surface tension for the reference fluid to maintain the interface between the reference fluid and the fluid to be measured (

) And the surface tension for the fluid to be measured (

The ratio is preferably 2 or less.

The reference fluid includes a Newtonian fluid having a constant viscosity regardless of the shear rate, and the fluid to be measured includes a non-Newtonian fluid whose viscosity changes according to the shear rate. It may include.

The reference fluid is phosphor buffered saline (PBS), and the measurement fluid is preferably blood.

The reference fluid and the fluid to be measured may include Newtonian fluid having a predetermined viscosity regardless of shear rate.

The reference fluid is ultrapure water (DI water), and the measurement target fluid is preferably an SDS solution.

On the other hand, according to the present invention, in accordance with the present invention, the first fluid injection portion is injected with a reference fluid having a reference viscosity (viscosity) and the second fluid injection portion is injected with the measurement target fluid to measure the viscosity, A flow resistance tube interconnecting the first fluid injector and the second fluid injector to form a flow path between the reference fluid and the fluid to be measured, and adjacent to the first fluid injector and the second fluid injector; A pair of valves disposed on the flow path of the flow resistance tube, the pair of valves for opening and closing the flow path of the reference fluid and the fluid to be measured, and the flow resistance tube between the pair of valves at regular intervals and the flow A plurality of display channel portions configured to receive the reference fluid and the measurement target fluid respectively flowing on the resistance tube flow path, and to display the flow distances of the reference fluid and the measurement target fluid; Fluid viscosity, characterized in that the box is made by the measuring device.

On the other hand, a first fluid injecting portion into which a reference fluid having a reference viscosity is injected, and a second fluid injecting portion into which a fluid to be measured to measure a viscosity is injected, and the first fluid injecting portion and the second fluid injecting portion are injected. A plurality of flow resistance tubes interconnecting the portions and forming flow paths of the reference fluid and the fluid to be measured, each having a different cross-sectional area, and the flow resistance tubes adjacent to the first fluid injection portion and the second fluid injection portion. A pair of valves disposed on the flow path, the pair of valves for opening and closing the flow path of the reference fluid and the measurement target fluid; The reference fluid and the measurement target fluid flowing over the flow path of the resistance tube are respectively received, and a plurality of the flow distances of the reference fluid and the measurement target fluid are displayed. It is also made by a fluid viscosity measuring device comprising a display channel portion.

Here, it is preferable that the pair of valves simultaneously open the flow paths of the plurality of flow resistance tubes so that the reference fluid and the measurement target fluid flow to the plurality of flow resistance tubes, respectively.

In addition, a first fluid injecting portion into which a reference fluid having a reference viscosity is injected, and a fluid to be measured for injecting a viscosity are injected, and extend in the circumferential direction with respect to the first fluid injecting portion, thereby measuring the fluid to be measured. A second fluid injection unit having an extension tube formed with a flow path of at least one flow resistance tube, at least one flow resistance tube radially interconnecting the first fluid injection unit and the extension tube, and forming a flow path between the reference fluid and the measurement target fluid; And each of the reference fluid and the measurement target fluid which are disposed in communication with each other at a predetermined interval on the flow resistance tube flow path and flow on the flow resistance tube flow path, respectively, to determine a flow distance between the reference fluid and the measurement target fluid. It also comprises a fluid viscosity measuring device comprising a plurality of display channel portion for displaying.

Specific details of other embodiments are included in the detailed description and drawings.

Therefore, according to the solution of the above problem, as the fluid flows inside the flow resistance tube by the capillary motion of the reference fluid and the measurement target fluid, an additional device for the flow of the reference fluid and the measurement target fluid becomes unnecessary. Accordingly, it is possible to improve the portability by implementing a slimmer fluid viscosity measuring device.

In addition, it is possible to improve the visibility of the flow distance between the reference fluid and the measurement target fluid by arranging the display channel sections at regular intervals in the flow resistance tube, and calculate the viscosity of the measurement target fluid using the number ratio of the display channel sections. Accordingly, a fluid viscosity measuring device capable of improving the portability by slimming the structure is provided.

In addition, a plurality of flow resistance tubes each having a different cross-sectional area can be provided to calculate the viscosity of the fluid to be measured under various shear rate conditions.

The effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

Advantages and features of the present invention, and a configuration and method for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, only the embodiments are to make the disclosure of the present invention complete, and common knowledge in the art to which the present invention pertains. It is provided to fully inform the person having the scope of the invention, which is defined only by the scope of the claims. For reference, in describing the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

Prior to the description, the fluid viscosity measuring apparatus according to a preferred embodiment of the present invention includes a first embodiment having one flow resistance tube, a second embodiment having a plurality of flow resistance tubes, and a second fluid injection provided with an extension tube. It is noted that the third embodiment having the wealth is divided in advance.

In addition, although the fluid viscosity measuring apparatus according to the first and second embodiments of the present invention are described with the same reference numerals for the same name, in the case of the fluid viscosity measuring apparatus according to the second and third embodiments of the present invention Since it has a flow resistance tube, it turns out in advance that it is described with the different code | symbol about a plurality of flow resistance tubes, respectively.

1 is a schematic block diagram of a fluid viscosity measuring apparatus according to a preferred embodiment of the present invention.

As shown in FIG. 1, the fluid viscosity measuring apparatus 1 according to an exemplary embodiment of the present invention includes a main body 10, a fluid injection unit 30, a flow resistance tube 40, a display channel unit 50, The valve 60, the valve driving unit 70, the input unit 80, the output unit 90, and the control unit 100 are included.

Here, a preferred embodiment of the present invention is an automatic fluid viscosity measuring apparatus 1 including a valve driving unit 70, an input unit 80, an output unit 90, and a control unit 100. However, unlike the preferred embodiment of the present invention, in the case of the manual fluid viscosity measuring apparatus 1, the valve driving unit 70, the input unit 80, the output unit 90 and the control unit 100 may be omitted.

The main body 10 forms the appearance of the fluid viscosity measuring device 1. The fluid injection unit 30, the flow resistance tube 40, the display channel unit 50, the valve 60, the valve driving unit 70, and the control unit 100 are accommodated in the main body 10. In addition, an input unit 80 for applying an operation signal and an output unit 90 for outputting a measured viscosity and the like are disposed outside the main body 10. Meanwhile, although not shown in the present invention, the battery 10 or the battery for driving the valve driving unit 70 and the output unit 90 may be accommodated in the main body 10.

Next, FIG. 2 is a schematic first operation diagram of a fluid viscosity measuring apparatus according to a first embodiment of the present invention, FIG. 3 is a schematic second operation diagram of a fluid viscosity measurement apparatus according to a first embodiment of the present invention, and FIG. 4 is a schematic third operation diagram of the fluid viscosity measuring device according to the first embodiment of the present invention.

As shown in FIGS. 2 to 4, the fluid injection unit includes a first fluid injection unit 32 and a second fluid injection unit 34.

The first fluid injection part 32 is injected with a reference fluid A having a reference viscosity A. As the reference fluid A injected into the first fluid injection part 32, a Newtonian fluid that maintains viscosity regardless of the change in shear rate is used. In one embodiment of the present invention, the reference fluid A injected into the first fluid injection unit 32 may be a Newtonian fluid such as phosphor buffered saline (PBS) or ultra pure water (DI water).

The second fluid injection part 34 is injected with a measurement target fluid B having a viscosity to be measured. The measurement target fluid B injected into the second fluid injection part 34 may be any one of a non-Newtonian fluid whose viscosity changes according to the shear rate and a Newtonian fluid having a constant viscosity regardless of the shear rate. Can be used. As an embodiment of the present invention, the measurement target fluid B injected into the second fluid injection unit 34 will be described as blood, which is a non-Newtonian fluid whose viscosity changes according to the shear rate. However, as described above, a fluid such as SDS (Sodium Dodecyl Sulfate) solution, which is a Newtonian fluid, may be used as the measurement target fluid B injected into the second fluid injector 34.

The flow resistance tube 40 interconnects between the first fluid injection portion 32 and the second fluid injection portion 34. The flow resistance tube 40 is provided in a tube shape in which a flow path of the reference fluid A and the measurement target fluid B is formed. Flow resistance tube 40 is provided as a rectangular cylinder shape having a rectangular cross-sectional shape as an embodiment of the present invention, unlike the present invention may be provided in a cylindrical and polygonal cylinder shape having a circular cross-sectional shape and a polygonal cross-sectional shape. have.

Here, the quasi-equilibrium, that is, the pressure of the reference fluid (A) and the measurement target fluid (B) in the flow resistance tube 40 interconnecting the first fluid injection portion 32 and the second fluid injection portion 34 Equilibrium is achieved. In the flow resistance tube 40, the reference fluid A and the measurement target fluid B maintain a mutual interface by quasi-equilibrium. Thus, when the reference fluid A and the measurement target fluid B maintain the mutually stable interface by quasi-equilibrium, the viscosity of the measurement target fluid B can be measured.

On the other hand, the experimental fluid in which the reference fluid (A) and the measurement target fluid (B) maintain a mutually stable interface in the flow resistance tube 40 with respect to the surface tension is shown in the following <Table>.

<Table>

As shown in the above <Table>, looking at the ratio of the area shown in bold, when the surface tension ratio of the reference fluid (A) and the measurement target fluid (B) is 2 or more, the ratio of the reference fluid (A) and the measurement target fluid (B) The mutual interface becomes unstable. As described above, when the interface state between the reference fluid A and the measurement target fluid B becomes unstable, difficulty in accurately measuring the viscosity of the measurement target fluid B occurs. Therefore, when using the reference fluid (A), it is preferable to select in consideration of the surface tension ratio of the reference fluid (A) to the measurement target fluid (B). For example, as described in <Table>, PBS having a surface tension ratio of 2 or less as a reference for the fluid B to be measured, such as blood, may be used as the reference fluid A.

Next, a plurality of display channel portions 50 are arranged in communication with the flow resistance tube 40 at predetermined intervals, and receive a plurality of reference fluids A and a fluid to be measured B, respectively, flowing on the flow resistance tube 40. Is provided. The display channel part 50 is disposed in the horizontal direction of the flow direction of the reference fluid A and the measurement target fluid B, that is, in the vertical direction of the flow resistance tube 40 as shown in FIGS. 2 to 4. The display channel unit 50 receives the reference fluid A and the measurement target fluid B, respectively, to increase the visibility of the flow distance between the reference fluid A and the measurement target fluid B, respectively. The viscosity of the fluid B to be measured may be calculated using a ratio of the number of the display channel parts 50 to which the reference fluid A is received and the number of the display channel parts 50 to which the fluid B is received. Can be.

The method for obtaining the viscosity of the fluid B to be measured is derived by the following <formula>.

)은 곡률(

) 및 기준유체(A) 내외부의 압력 차이에 의해 유도되고, 측정 대상 유체(B)의 표면장력(

)은 곡률(

) 및 측정 대상 유체(B) 내외부의 압력 차이에 의해 유도된다. 표면장력을 유도하는 식은 라플라스 법칙(Laplace Law)에 의해 유도되므로, 상세한 과정은 생략한다.Referring to FIG. 2, the reference fluid A and the measurement target fluid B flowing from the first first fluid injection part 32 and the second fluid injection part 34 are linear in the flow resistance tube 40. And flow. Here, the surface tension of the reference fluid (A)

) Is the curvature (

) And the surface tension of the fluid (B) to be measured

) Is the curvature (

And pressure difference inside and outside the fluid B to be measured. Since the formula for inducing surface tension is derived from Laplace Law, the detailed procedure is omitted.

), 접촉각(

) 및 유동 거리(

)와 측정 대상 유체(B)의 표면장력(

), 접촉각(

) 및 유동 거리(

)를 고 려한 측정 대상 유체(B)의 점성 계수(

)는 다음은 같은 <식 1>로 유도된다.Surface tension of the reference fluid (A)

), Contact angle (

) And flow distance (

) And the surface tension of the fluid (B)

), Contact angle (

) And flow distance (

), The viscosity coefficient (

) Is derived from the following <Equation 1>.

<식 1>

<Equation 1>

)는 기준유체(A)가 수령된 표시채널부(50) 개수(

)에 비례하고, 측정 대상 유체(B)의 유동 거리(

)는 측정 대상 유체(B)가 수령된 표시채널부(50) 개수(

)에 비례한다.By the way, the flow distance of the reference fluid (A)

) Denotes the number of display channel portions 50 in which the reference fluid A is received.

Proportional to the flow distance of the fluid B to be measured (

) Denotes the number of the display channel portions 50 in which the measurement target fluid B is received.

Is proportional to).

Therefore, <Equation 1> is derived to the following <Equation 2> corresponding to the number ratio of the display channel section 50.

<식 2>

<Equation 2>

,

) 및 표면장력(

,

)은 고유한 일정값이므로,

된다. 따라서, 측정 대상 유체(B)의 점성 계수(

)는 기준유체(A)의 점성 계수(

) 및 기준유체(A)의 표시채널부(50)와 측정 대상 유체(B)의 표시채널부(50) 개수비에 의해 산출될 수 있다.Here, the contact angle of the reference fluid (A) and the fluid to be measured (

,

) And surface tension (

,

) Is a unique constant,

do. Therefore, the viscosity coefficient of the fluid B to be measured (

) Is the viscosity coefficient of the reference fluid (A)

) And the ratio of the number of display channel portions 50 of the reference fluid A to the display channel portions 50 of the fluid B to be measured.

The valve 60 includes a first valve 62 and a second valve 64. The first valve 62 is interposed between the first fluid injection part 32 and the display channel part 50 adjacent to the first fluid injection part 32 and injected into the first fluid injection part 32. The flow path of A) is opened and closed. The second valve 64 is interposed between the second fluid injection part 34 and the display channel part 50 adjacent to the second fluid injection part 34 and injected into the second fluid injection part 34. The flow path of (B) is opened and closed. The first valve 62 and the second valve 64 are simultaneously operated such that the reference fluid A and the measurement target fluid B simultaneously flow into the flow resistance tube 40.

The valve driving unit 70 is operated by the control signal of the control unit 100 to be described later. The valve driving unit 70 is operated such that the first valve 62 and the second valve 64 simultaneously open and close the flow path of the reference fluid A and the flow path of the measurement target fluid B at the same time.

The input unit 80 and the output unit 90 are provided to display the viscosity of the fluid B to be measured and the operation signal applied to the fluid viscosity measuring device 1, respectively. The input unit 80 may use a known device such as a switch, and the output unit 90 may use a known display such as an LCD.

The controller 100 controls the operation of the valve driver 70 to simultaneously operate the first valve 62 and the second valve 64 based on the signal applied by the input unit 80. In addition, the controller 100 may control the output unit 90 to output the viscosity of the measurement target fluid B calculated by calculating the number ratio of the display channel unit 50.

5 is a schematic operation diagram of the fluid viscosity measuring device 1 according to the second embodiment of the present invention.

As shown in FIG. 5, the fluid viscosity measuring device 1 according to the second embodiment of the present invention is different from the fluid viscosity measuring device 1 according to the first embodiment of the present invention. 242, 244, 246, 248).

The fluid viscosity measuring device 1 according to the second embodiment of the present invention includes a first flow resistance tube 242, a second flow resistance tube 244, a third flow resistance tube 246, and a fourth having a different cross-sectional area. Since it consists of a flow resistance tube 248, it has the advantage of measuring the viscosity of the fluid to be measured (B) according to the shear rate condition changes.

Of course, the cross-sectional shape of the first flow resistance tube 242, the second flow resistance tube 244, the third flow resistance tube 246 and the fourth flow resistance tube 248 should be the same. For example, when the cross-sectional shape of the first flow resistance tube 242 is rectangular, the second flow resistance tube 244, the third flow resistance tube 246, and the fourth flow resistance tube 248 have only a cross-sectional area. They should be different but have the same rectangular cross-sectional shape.

6 is a schematic operation of the fluid viscosity measuring apparatus according to a third embodiment of the present invention.

As shown in FIG. 6, the fluid viscosity measuring apparatus 1 according to the third embodiment of the present invention is different from the first and second embodiments of the present invention, centering on the first fluid injection part 32. A second fluid injection portion 34 having an extension tube 34b extending in the circumferential direction is disclosed.

The second fluid injection portion 34 includes an injection portion body 34a into which the measurement target fluid B is injected and an extension tube 34b extending in the circumferential direction from the injection portion body 34a. The measurement target fluid B injected into the injection body 34a flows into the extension pipe 34b by capillary action. At this time, when the flow of the measurement target fluid B on the extension pipe 34b flow path is completed, the valve 60 is operated to open the flow path of the reference fluid and the measurement target fluid B.

In addition, a flow resistance tube 40 is disposed between the first fluid injection portion 32 and the extension pipe 34b. The flow resistance tube 40 according to the third embodiment of the present invention is, for example, a first flow resistance tube 342 disposed radially between the first fluid injection part 32 and the extension pipe 34b, and And a second flow resistance tube 344 and a third flow resistance tube 346. Here, since the first flow resistance tube 342, the second flow resistance tube 344, and the third flow resistance tube 346 have different cross-sectional areas, the fluid viscosity measuring apparatus according to the second embodiment of the present invention ( As shown in 1), the viscosity of the fluid to be measured according to the change of the shear rate condition may be measured.

Therefore, as the fluid flows into the flow resistance tube by the capillary motion of the reference fluid and the fluid to be measured, an additional device for the flow of the reference fluid and the fluid to be measured becomes unnecessary, thereby making the fluid viscosity measuring device slimmer. The portability can be improved.

In addition, it is possible to improve the visibility of the flow distance between the reference fluid and the measurement target fluid by arranging the display channel sections at regular intervals in the flow resistance tube, and calculate the viscosity of the measurement target fluid using the number ratio of the display channel sections. Accordingly, it is possible to improve the portability by slimming the structure.

In addition, a plurality of flow resistance tubes each having a different cross-sectional area can be provided to calculate the viscosity of the fluid to be measured under various shear rate conditions.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, . Therefore, it should be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is shown by the following claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. do.

1 is a schematic block diagram of a fluid viscosity measuring apparatus according to a preferred embodiment of the present invention,

2 is a schematic first operation diagram of a fluid viscosity measuring device according to a first embodiment of the present invention;

3 is a schematic second operation diagram of a fluid viscosity measuring device according to a first embodiment of the present invention;

4 is a schematic third operation diagram of a fluid viscosity measuring device according to a first embodiment of the present invention;

5 is a schematic operation diagram of a fluid viscosity measuring device according to a second embodiment of the present invention;

6 is a schematic operation diagram of a fluid viscosity measuring device according to a third embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

 30: fluid injection portion 32: first fluid injection portion

 34: second fluid inlet 40: flow resistance tube

 34a: injection body 34b: extension tube

 50: display channel portion 60: valve

 62: first valve 64: second valve

 80: input unit 90: output unit

100: control unit 242: first flow resistance tube

244: second flow resistance tube 246: third flow resistance tube

248: fourth flow resistance tube 342: first flow resistance tube

344: second flow resistance tube 346: third flow resistance tube

Claims (15)

A first fluid injection part into which a reference fluid having a reference viscosity is injected, and a second fluid injection part into which a fluid to be measured to measure viscosity is injected; A flow resistance tube interconnecting the first fluid injector and the second fluid injector, and forming a flow path between the reference fluid and the fluid to be measured; A plurality of displays configured to communicate with the flow resistance tube at regular intervals and receive the reference fluid and the measurement object fluid respectively flowing on the flow resistance tube flow path to display the flow distances of the reference fluid and the measurement object fluid; Including a channel section, And measuring the viscosity of the fluid to be measured using the ratio of the number of the display channel to the reference fluid and the fluid to be measured. The method of claim 1, And a pair of valves disposed between the display channel portions adjacent to the first fluid injection portion and the second fluid injection portion to open and close the flow paths of the reference fluid and the measurement target fluid. Fluid viscosity measuring device. 3. The method of claim 2, The pair of valves fluid viscosity measuring device, characterized in that for simultaneously opening the flow path of the flow resistance tube so that the reference fluid and the fluid to be measured at the same time flow. The method of claim 1, The display channel portion is a fluid viscosity measuring device, characterized in that formed in the transverse direction of the flow direction of the reference fluid and the fluid to be measured. delete The method of claim 1, Viscosity coefficient of the fluid to be measured is calculated based on the following equation.

= Coefficient of viscosity of the reference fluid

= Viscosity coefficient of the fluid to be measured

: Surface tension between reference fluid and flow resistance tube

: Surface tension between the fluid to be measured and the flow resistance tube

: Contact angle between reference fluid and flow resistance tube

: Contact angle between the fluid to be measured and the flow resistance

: Number of display channel sections to receive reference fluid

: Number of display channel sections to receive the fluid to be measured The method of claim 6, Surface tension for the reference fluid to maintain the interface between the reference fluid and the fluid to be measured (

) And the surface tension for the fluid to be measured (

) Fluid viscosity measuring device, characterized in that the ratio is 2 or less. The method of claim 1, The reference fluid includes Newtonian Fluid having a certain viscosity regardless of shear rate, The fluid to be measured fluid viscosity measuring apparatus, characterized in that the non-Newtonian fluid (non-Newtonian Fluid) is changed in accordance with the shear rate. The method of claim 8, The reference fluid is phosphate buffered saline (PBS), the fluid viscosity measuring device, characterized in that the fluid to be measured (blood). The method of claim 1, And the reference fluid and the fluid to be measured include a Newtonian fluid having a predetermined viscosity regardless of shear rate. The method of claim 10, The reference fluid is ultra-pure water (DI water), the fluid to be measured is a fluid viscosity measuring device, characterized in that the SDS solution (SDS solution). A first fluid injection part into which a reference fluid having a reference viscosity is injected, and a second fluid injection part into which a fluid to be measured to measure viscosity is injected; A flow resistance tube interconnecting the first fluid injector and the second fluid injector, and forming a flow path between the reference fluid and the fluid to be measured; A pair of valves disposed on flow paths of the flow resistance tube adjacent to the first fluid injection part and the second fluid injection part to open and close the flow paths of the reference fluid and the measurement target fluid; Receiving the reference fluid and the measurement target fluid, which are arranged in communication with the flow resistance tube at a predetermined interval between the pair of valves, and flow on the flow resistance tube flow path, respectively, and thus the flow of the reference fluid and the measurement target fluid Including a plurality of display channel portion for displaying the distance, And measuring the viscosity of the fluid to be measured using the ratio of the number of the display channel to the reference fluid and the fluid to be measured. A first fluid injection part into which a reference fluid having a reference viscosity is injected, and a second fluid injection part into which a fluid to be measured to measure viscosity is injected; A plurality of flow resistance tubes interconnecting the first fluid injector and the second fluid injector and forming flow paths of the reference fluid and the measurement target fluid, each having a different cross-sectional area; A pair of valves disposed on flow paths of the flow resistance tube adjacent to the first fluid injection part and the second fluid injection part to open and close the flow paths of the reference fluid and the measurement target fluid; The reference fluid and the measurement target fluid, which are arranged in communication with each other at a predetermined interval on the plurality of flow resistance tube flow paths between the pair of valves, are received, respectively, and receive the reference fluid and And a plurality of display channel portions for displaying a flow distance of the fluid to be measured. The method of claim 13, And a pair of valves simultaneously open the flow paths of the plurality of flow resistance tubes such that the reference fluid and the measurement target fluid flow to the plurality of flow resistance tubes at the same time. A first fluid injection unit into which a reference fluid having a reference viscosity is injected; A second fluid injecting part into which a fluid to be measured for measuring viscosity is injected and extending in a circumferential direction with respect to the first fluid injecting part and having an extension tube in which a flow path of the fluid to be measured is formed; At least one flow resistance tube radially interconnecting between the first fluid injection portion and the extension tube and forming a flow path between the reference fluid and the measurement object fluid; The reference fluid and the measurement target fluid, which are respectively communicated with each other at predetermined intervals on the flow resistance tube flow path and are flowed on the flow resistance tube flow path, are respectively received to display the flow distances of the reference fluid and the measurement object fluid. Fluid viscosity measuring device comprising a plurality of display channel portion.

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