KR102601069B1 - Determination of force distribution in the jet streams by single load cell and its instrumentation - Google Patents

Abstract

The present invention relates to a fluid force distribution measuring device using a single load cell that measures the force distribution of a jet sprayed from a spray nozzle, an adapter whose front is disposed perpendicular to the spray direction of the fluid, and a rear of the adapter disposed on the adapter. A load cell that measures the force received, a moving part disposed on the rear of the load cell and moved in vertical and horizontal directions, and the position of the spray nozzle is fixed, the adapter is moved in one direction by the moving part, and the adapter It includes a control unit that calculates the force distribution of the jet by measuring the pressure of the jet depending on the position of the jet, and has the advantage of being able to measure the force or pressure of the jet with high accuracy by using a single load cell.

Description

Method and device for measuring fluid force distribution using a single load cell {Determination of force distribution in the jet streams by single load cell and its instrumentation}

The present invention relates to a device for measuring force distribution of a fluid, and more specifically, to a method and device for measuring fluid force distribution using a single load cell that measures the force distribution of the force of fluid sprayed from a nozzle through a single load cell. .

Equipment and facilities that have the function of spraying a jet of gas or liquid or a mixture thereof in the form of a spray are being manufactured, and optimal performance evaluation methods are being developed to operate them. In particular, there is an increasing demand for systems that require fine jet or spray atomization processes used in the manufacture of microelectronic devices.

In general, injector pressure distribution measurement systems can be classified as those utilizing pressure-sensitive films, pressure distribution 2D sensors, and load cells, respectively. Pressure-sensitive film is widely used because it is inexpensive and can be used on a large area. However, due to the nature of the pressure-sensitive film, it is almost impossible to measure dynamic changes in injection pressure, and the measurable pressure range is very limited. The method using a pressure distribution 2D sensor or its array has the advantage of measuring a wide range of pressure relatively accurately by selecting the electrode gap and filling material. However, if the spray is a liquid or spray, measurement is difficult due to the phenomenon of sticking to the surface.

Load cells have very high accuracy in measuring pressure values, have low system configuration costs, and can provide real-time pressure information of the injector through fast response speed. However, since load cells fundamentally provide information about pressure or force only at a point, it is difficult to apply them to measuring the surface distribution of a jet. A method of configuring an array of load cells is proposed, but it has disadvantages such as interference and perturbation between individual load cells and an increase in system price.

In other words, existing fluid force distribution measurement devices have limitations in spatial measurement accuracy and late time constants that occur because cross-talk between pixels of each sensor array cannot be avoided due to the mechanical characteristics of the sensors used to measure pressure. . Additionally, due to the non-uniformity of the material, the response accuracy error between each pixel is relatively large. In addition, it is impossible to avoid the influence on adjacent pixels due to the fluid flow that occurs after the jet collides with the jet surface, and at the same time, due to the characteristics of the sensor surface, if the jet is a liquid component, the effect of pressure caused by the remaining liquid cannot be eliminated. I can't. Moreover, the biggest drawback is that even today, the high price range of these jet pressure or force distribution measurement systems is still high.

Therefore, the present invention was created to solve the problems of the prior art as described above. The purpose of the present invention is to enable high-accuracy pressure or force measurement using a load cell and to reduce the cost of the measurement system by composing a single load cell. To provide a method and device for measuring fluid force distribution using a reduced single load cell.

The technical challenges sought to be achieved by the embodiments of the present application are not limited to those described above, and other technical challenges may exist.

The present invention relates to a fluid force distribution measuring device using a single load cell that measures the force distribution of a jet sprayed from a spray nozzle, an adapter whose front is disposed perpendicular to the spray direction of the fluid, and a rear of the adapter disposed on the adapter. A load cell that measures the force received, a moving part disposed on the rear of the load cell and moved in vertical and horizontal directions, and the position of the spray nozzle is fixed, the adapter is moved in one direction by the moving part, and the adapter It includes a control unit that calculates the force distribution of the injection body by measuring the pressure of the injection body according to the position of.

In addition, the moving part is characterized in that it moves in a straight direction so as to pass through the center of the adapter while the adapter is not in contact with the jet.

Additionally, the adapter is formed at a corner of the front surface and includes an inclined portion formed to become narrower from the front to the back.

In addition, when a portion of the jet hits the front surface and a portion passes without contacting the front surface, the inclined portion is formed at an angle of 45 degrees or more so that the jet passes at a distance from the side of the adapter.

In addition, the control unit is characterized in that it derives a force according to the Coanda effect through data using a rectangular parallelepiped adapter and data using an adapter in which the inclined portion is formed.

In addition, in the fluid force distribution measuring device using a single load cell for measuring the force distribution of a jet sprayed from a spray nozzle, the outer surface is disposed perpendicular to the spray direction of the jet, and one or more through holes are formed to allow the jet to pass through. A drum including a drum, and an adapter disposed inside the drum, the front of which is perpendicular to the direction of fluid injection, a load cell disposed at the rear of the adapter to measure the force received by the adapter, and a rotation that rotates the drum. It includes a device and a control unit that measures the force distribution of the jet through the measured value of the load cell according to the rotation angle of the drum.

In addition, the edges of the through hole are characterized in that they are formed in an inclined wedge shape or a vertical shape.

In addition, the control unit receives the rate of passage of the jet according to the rotation angle of the drum, and measures force distribution by mapping the portion passing through the through hole according to the rotation angle.

In addition, a spraying step in which the spraying material is sprayed at a certain pressure from the spraying nozzle, a moving step in which the adapter disposed perpendicular to the spraying direction is moved horizontally or vertically by a moving part, and the load cell disposed on the rear of the adapter is horizontal or vertical. A pressure measurement step of measuring the pressure of the jet while moving to and the control unit includes a force distribution derivation step of deriving the force distribution of the jet through the pressure measured according to the position of the adapter.

In addition, the moving step is a method of measuring fluid force distribution using a single load cell, characterized in that the injection body is moved so that it passes through the center of the adapter.

The present invention utilizes a single load cell and has the advantage of being able to configure the system at a lower cost compared to existing measurement system configurations.

In addition, there is an advantage of being able to measure the force or pressure of the injector with high accuracy by using a single load cell.

In addition, the load cell has a wide measurement range, and the range of the jet is not limited because the load cell moves and measures the force or pressure of the jet.

Additionally, the Coanda effect caused by the structure interacting with the jet can be measured.

Figure 1 shows a first embodiment of the present invention.
Figure 2 is an exemplary diagram of the x-axis and y-axis of the present invention.
Figure 3 is a diagram showing the expected force distribution of the jet.
Figure 4 is a predicted force distribution by position in the first embodiment.
Figures 5 and 6 are data of the first embodiment.
Figure 7 shows a second embodiment of the present invention.
Figure 8 is a front view of the adapter of the second embodiment.
Figure 9 is a predicted force distribution by position in the second embodiment.
Figures 10 and 11 show measurement data of the second embodiment.
Figure 12 is an example of measuring the Coanda effect using the present invention.
Figure 13 shows a third embodiment of the present invention.

Since the present invention can make various changes and have various embodiments, specific embodiments will be illustrated in the drawings and described in detail. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all changes included in the spirit and technical scope of the present invention.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by a person of ordinary skill in the technical field to which the present invention pertains.

Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and unless clearly defined in the present application, should not be interpreted in an ideal or excessively formal sense. It shouldn't be.

Hereinafter, a method and device for measuring fluid force distribution using a single load cell according to an embodiment of the present invention will be described in detail with reference to the attached drawings.

Figure 1 shows a first embodiment of the present invention. Referring to FIG. 1, in the fluid force distribution measuring device using a single load cell 300 to measure the force distribution of the jet sprayed from the spray nozzle 100, the front 210 is arranged perpendicular to the fluid spray direction. an adapter 200, a load cell 300 disposed on the rear of the adapter 200 to measure the force received by the adapter 200, and a load cell 300 disposed on the rear of the load cell 300 to move up and down and left and right The positions of the unit 400 and the injection nozzle 100 are fixed, the adapter 200 is moved in one direction by the moving unit 400, and the pressure of the injection body according to the position of the adapter 200 It includes a control unit that calculates the force distribution of the jet through measurement.

The injection nozzle 100 sprays an injection material by a connected pump. A propellant is a single substance or mixture. The jet is sprayed in various forms such as jet and spray, and the present invention is not limited to the spray form.

The adapter 200 is formed as a polyhedron, and the first embodiment is explained by taking the adapter 200 as an example, formed as a rectangular parallelepiped. The adapter 200 is arranged to be spaced apart from the injection nozzle 100 and includes a front surface 210 disposed perpendicular to the injection direction, and a coupling surface formed parallel to the front surface 210 and coupled to the load cell 300. .

For force distribution measurements, fluids corresponding to gas or liquid are generally used. However, in actual sites, liquid and solid powders and mixed states are often used, so these materials can stick to the surface of the adapter and apply additional force to the load cell. In order to eliminate this, the present invention has the feature of surface modifying the surface of the adapter to have super-hydrophobic properties. At a sufficiently small angle (< 5 deg), liquid droplets on the surface can be removed at a sufficient speed, so that no additional force is applied to the load cell.

The front 210 directly contacts the sprayed jet. The vertical and left-right lengths of the front surface 210 are formed to be larger than the spray diameter of the spray nozzle 100. In addition, it is formed to be larger than the diameter of the injected object in contact with the measurement surface.

The load cell 300 is coupled to the adapter 200 through a coupling portion formed on the rear side. The load cell 300 is arranged perpendicular to the injection direction and receives the force of the injection body through the adapter 200.

The moving part 400 is coupled to the rear of the load cell 300 and moves up and down or left and right. More precisely, it moves up and down or left and right on a plane perpendicular to the spray direction of the jet. The movement range of the moving part 400 includes a state in which the injected jet and the adapter 200 are in contact and a state in which they are not in contact when the position of the injection nozzle 100 is fixed and the pressure of the jet is constant. . That is, the movement range corresponds to a position where the adapter 200 does not come into contact with the jet when moving straight up and down or left and right, and then does not come into contact with the jet again after passing through the center of the adapter 200. A detailed description of the location of the moving unit 400 will be described later.

The control unit receives the measured value of the jet from the load cell 300 and the moving distance of the adapter 200 from the moving unit 400, and distributes the force of the jet through the force of the jet according to the moving distance of the adapter 200. outputs. That is, the force distribution of the jet can be obtained by adjusting the area of the jet in contact with the front 210 of the adapter 200.

Figure 2 is an exemplary diagram of the x-axis and y-axis of the present invention. Referring to FIG. 2, the adapter 200 moves in the xy plane perpendicular to the spraying direction by the moving part. Through this xy plane, the x-axis direction, y-axis direction, up-down direction, and left-right direction described in the present invention are defined. A virtual plane perpendicular to the injection direction is formed, and the x-axis direction on the plane is defined as left and right, and the y-axis direction is defined as up and down.

When the spray nozzle 100 is fixed, the spray pressure is constant, and the spray direction is constant, moving the adapter along the x-axis is called left-right direction, and moving along the y-axis is called up-down direction.

The adapter is moved up and down and left and right by the moving part, and can be moved up and down and left and right depending on the purpose of the test. The moving part moves in combination with components such as rails, pistons, and multi-joint arms, and there is no limitation on the configuration for moving the moving part.

Figure 3 is a diagram showing the expected force distribution of the jet. Referring to Figure 3(a), this is the theoretical value of the injection material sprayed from the injection nozzle. In a general state, the distribution of fluid force is relatively uniform immediately after the outlet, but becomes Gaussian when spaced out to a certain extent.

The distribution of force on the surface of the jet of the jet is expressed as a Gaussian function as shown in Equation 1 below.

[Equation 1]

Meanwhile, the normalized measured force, P _{m, N,} when a part of the jet passes outside the jet surface and only a part hits the jet surface as it moves in the x-axis direction of the jet surface, is given below [Equation 2] expressed together.

[Equation 2]

While the above F _m,N does not have a numerical solution, the differential value of the normalized measured force, P _m,N, on the x-axis, the displacement axis, can be expressed in analytical form as follows. .

[Equation 3]

Figure 3(b) shows the force of the jet according to the moving distance of the adapter. Through this, the adapter moves in a constant state and measures the pressure of the jet through the measured force. This shows the theoretical value when measured while moving the injector in the x-axis direction. The present invention expresses P _m,N with the following approximate equation to enable easy comparison of future experimental results.

[Equation 4]

이다.Here a ₀ = -6.71387×10 ^-3 ; a ₁ = -1.55115, a ₂ = -5.13306×10 ^-2 , a ₃ = -5.49164×10 ^-2 , and variable S is

am.

Figure 3(c) is a graph of the amount of change in force depending on location. This shows the theoretical value when measured while moving the injector in the x-axis direction. When the adapter moved from the outside to the center, a positive force was generated, and when the adapter moved from the center to the outside, a negative force was generated. A detailed explanation will be provided later with reference to FIG. 4.

Figure 4 is a predicted force distribution by position in the first embodiment. Referring to FIG. 4, this is theoretical data measured while the adapter moves on a plane formed in a direction perpendicular to the injection direction while the position of the injection nozzle is fixed and the injection body is injected at a constant pressure. In an example of FIG. 4, the adapter moves from top to bottom, and the moving direction of the adapter is not limited. Figure 4(a) shows the position of the adapter, Figure 4(b) shows the force measured according to the position, and Figure 4(c) shows the amount of change in force depending on the position.

In position 1, the side of the adapter is affected by the jet first rather than the front due to the spreading effect of the jet. A portion of this jet exerts a fluid force corresponding to the vertical component. At this time, if the thickness of the adapter is infinitely thin, the detected force is measured to be negligible.

In position 2, a portion of the jet hits the adapter. A part of the jet passes next to the adapter, but since no part of the jet directly affects the side of the jet, it is no different from the case where the adapter is infinitely thin.

In position 3, when the width of the front of the adapter is sufficiently large compared to the cross-sectional area of the jet, the force of the jet does not change depending on the change in moving distance, and the change in force becomes 0.

Position 4 is no different from the case where the thickness of the adapter is infinitely thin, like position 2, and position 5 is similar to position 1.

Figures 5 and 6 are data of the first embodiment. Figure 5 shows data that the adapter moved in the x-axis direction, and Figure 6 shows data that the adapter moved in the y-axis direction. Figures 5(a) and Figure 6(a) show a back pressure of 250 kPa, Figures 5(b) and Figure 6(b) show a back pressure of 350 kPa, and Figures 5(c) and Figure 6(c) show a back pressure of 500 kPa. This is the data. At this time, the solid line is theoretically predicted data using an infinitely thin adapter, and the dot data is actually measured data using the adapter of the first embodiment.

Referring to Figures 5 and 6, it can be seen that the theoretical value drawn as a solid line and the measured value indicated as a dot are different in the areas corresponding to position 1 and position 5. In particular, as back pressure increases, the difference between measured and theoretical values increases.

In addition, it can be seen that the amount of change in force observed at positions 2 and 4 decreases very rapidly when compared to the theoretical value. The decrease in the amount of change in force is interpreted as a sharp decrease in the size of the force acting perpendicular to the adapter, which means that the effective radius of the injector has decreased.

This phenomenon is a pressure drop caused by the formation of a wall jet, in which fluid flows along a certain shape of a wall at an appropriate angle. In other words, it corresponds to the Coanda effect, where fluid flows along a surface instead of flowing in a straight line. The theoretical expected value and the measured value using the configuration of the first embodiment have a similar force distribution tendency, but the adapter cannot be formed infinitely thin as in theory, so the difference is due to the spreading effect of the injector and the pressure drop due to wall flow. Occurs.

Figure 7 shows a second embodiment of the present invention. This is an improved embodiment of the first embodiment. Referring to FIG. 7, in the fluid force distribution measuring device using a single load cell 300 to measure the force distribution of the jet sprayed from the spray nozzle 100, the front 210 is disposed perpendicular to the fluid spray direction. an adapter 200, a load cell 300 disposed on the rear of the adapter 200 to measure the force received by the adapter 200, and a load cell 300 disposed on the rear of the load cell 300 to move up and down and left and right The positions of the unit 400 and the injection nozzle 100 are fixed, the adapter 200 is moved in one direction by the moving unit 400, and the pressure of the injection body according to the position of the adapter 200 It includes a control unit that calculates the force distribution of the jet through measurement.

The force distribution of the jet is measured in the same manner as in the first embodiment. However, the shape of the adapter 200 was modified to reduce the difference between theoretical and measured values. In other words, a shape was applied to reduce the diffusion effect and reduce the pressure drop due to wall flow.

The adapter of the second embodiment is formed at a corner of the front surface and includes an inclined portion formed to become narrower from the front to the back. When comparing the adapter 200 of the first embodiment and the adapter 200 of the second embodiment, the thickness is the same, but the size of the lower part is reduced to form an inclined portion 220 on the front surface 210. The inclined portion 220 is formed at the corner of the front 210, and the injected jet does not flow along the side of the adapter 200, which has the advantage of reducing the pressure drop due to wall flow and obtaining data similar to theoretical values. . In other words, it has the characteristic of having an effect similar to that of an adapter whose thickness is infinitely thin through the inclined portion.

Figure 8 is a front view of the adapter of the second embodiment. Referring to FIG. 8, the adapter 200 includes a front surface 210 formed perpendicular to the injection direction of the jet, a coupling portion formed on the opposite side of the front surface 210 and coupled to the load cell 300, and an adapter 200. The lower cross-sectional area is smaller than that of the front surface 210 and includes an inclined portion 220 formed at a corner of the front surface 210.

By proposing a shape with an inclined surface on the front 210 of the adapter 200, we propose a method to solve the problem of wall flow and increase reliability and accuracy while being economical. At this time, the inclination of the inclined portion 220 is 45 degrees in consideration of the strength of the material to minimize the bending phenomenon of the adapter 200 due to the injector while maintaining an appropriate inclination angle with the injector to minimize the Coanda effect. It is formed as above.

Figure 9 is a predicted force distribution by position in the second embodiment. Referring to FIG. 9, when evaluating the characteristics of a jet using an adapter and a load cell, eliminating the influence of spreading will be explained through the force distribution diagram for each position of the second embodiment.

Referring to Figure 9, the adapter moves vertically at regular intervals from the outlet of the spray nozzle. In the case of position 1, even if the thickness of the adapter is thick, there is almost no effect due to the bending phenomenon of the spray material as it spreads on the side of the adapter due to the inclined portion. In other words, the adapter has a smaller cross-sectional area at the rear end than the cross-sectional area at the front, so it is less affected by spreading.

In position 2, a certain portion of the jet that does not hit the front of the adapter does not directly affect the side of the adapter due to the slope of the adapter, so it is no different from the case where the adapter is infinitely thin. In position 3, the area of the jets is smaller than the width of the adapter, so the force caused by all jets can be accurately measured. Position 4 is not much different from position 2, and position 5 is not much different from position 1.

Therefore, in the second implementation, by forming an inclined portion, the spreading effect of the jet affecting the wall surface of the adapter can be reduced and a measured value close to the theoretical value can be obtained.

In addition, the inclined part can solve problems caused by changes in the flow field of the jet itself due to wall flow, which occurs when a flow rate of a certain speed or higher meets a wall surface at a certain angle.

Figures 10 and 11 show measurement data of the second embodiment. FIG. 10 shows data measured while the adapter of the second embodiment moves along the x-axis, and FIG. 11 shows data measured while the adapter of the second embodiment moves along the y-axis. The solid line is the theoretical value, and the location of the point corresponds to the measurement data according to the location. Referring to Figures 10 and 11, it can be seen that the measured values of the second example are very similar to the theoretical values. The force measurement values and force changes in all areas corresponding to position 1 to position 5 are very similar to the theoretical values. In addition, it can be seen that the accuracy is high as there is no significant difference as the back pressure changes.

The present invention includes a method for measuring fluid force distribution using a single load cell. A spraying step in which the spraying material is sprayed at a certain pressure from the spraying nozzle, a moving step in which the adapter disposed perpendicular to the spraying direction is moved horizontally or vertically by a moving part, and the load cell disposed on the rear of the adapter moves horizontally or vertically. A pressure measuring step of measuring the pressure of the jet, and a force distribution deriving step where the control unit derives the force distribution of the jet through the pressure measured according to the position of the adapter.

In the injection stage, the injection material is continuously sprayed at a constant pressure until the pressure measurement is completed.

The moving step is characterized in that the injection body is moved to pass through the center of the adapter. The adapter penetrates the center of the adapter without the spray object colliding with the adapter, and then moves back to a position where it does not collide with the adapter. At this time, the adapter moves in a straight line.

In the pressure measurement step, the pressure of the spray is measured through a load cell placed on the rear of the adapter. At this time, the load cell moves with the adapter and measures.

The force distribution derivation step measures the force distribution of the jet by graphing the force measured according to the moving distance of the adapter. Using the fact that the part of the jet that hits the adapter changes as it moves, the force is measured at each part to derive the force distribution.

Figure 12 is an example of measuring the Coanda effect using the present invention. The present invention quantitatively measures force induced by Coanda effect using the adapter of the first embodiment and the adapter of the second embodiment of different shapes. Measurement can be made using a load cell equipped with an adapter structure with the Coanda effect (first embodiment) and an adapter with a negligible Coanda effect (second embodiment).

Measured values are obtained from a jet sprayed under the same conditions, and the difference in measured values can be understood as the effect of two different forces. The first is the effect caused by the spread of the projectile, and the second is the Coanda effect. Comparing the difference between them, the spreading effect has a positive sign, same as the nozzle's jet, while the Coanda effect has a negative sign. In other words, the spreading effect has a positive sign because force is added to the adapter in the injection direction, and the Coanda effect has a negative sign because pressure reduction occurs.

Looking at the process of the adapter in FIG. 12(b) approaching the jet and the process of separating it in FIG. 12(c), the adapter of the first embodiment affects the wall surface of the adapter by a portion of the jet at positions 1 and 5. It increases and adds weight to the measured value. On the other hand, in positions 2 and 4, part of the jet directly affects the surface of the adapter. A part of the jet forms a wall flow, and as the distance of the flow increases, the pressure in that area decreases.

At the point where the adapter begins to approach the jet, the change in force begins to decrease, decreases to a negative value, and then becomes 0 at the point where the proximity process is completed. After passing this point, all parts of the jet are located within the adapter surface, so both of the above forces are 0, so the force displacement also has a value of 0.

When the jets reach the end of the adapter surface and some of them form wall flows, the force displacement decreases and becomes negative. As the area of overlap between the adapter surface and the injector decreases, the force displacement gradually increases, and as the separation process is completed, the effect of reducing the intensity of the load cell signal due to the Coanda effect becomes 0, leaving only the spreading effect. do. That is, the displacement sign of the force is positive. At this time, the measured value in the area where the displacement amount of force becomes negative corresponds to the minimum force of the Coanda effect.

Through this, the present invention can evaluate the specifics of the pneumatic pulse of a pneumatic tonometer used in actual clinical trials and health examinations by using an adapter that can minimize the Coanda effect and spreading effect. Additionally, the characteristics of minimizing the Coanda effect and spreading effect can be applied to various industrial fields.

Figure 13 shows a third embodiment of the present invention. Referring to FIG. 13, in the fluid force distribution measuring device using a single load cell to measure the force distribution of the jet sprayed from the injection nozzle, the outer surface is disposed perpendicular to the injection direction of the jet and is formed to allow the jet to pass. A drum 500 including one or more through holes, and an adapter 200 disposed inside the drum, the front of which is perpendicular to the direction of fluid injection, and disposed at the rear of the adapter to absorb the force received by the adapter. It includes a load cell 300 for measuring, a rotating device for rotating the drum, and a control unit for measuring the force distribution of the spray object through the measured value of the load cell according to the rotation angle of the drum.

In addition, the control unit receives the rate of passage of the jet according to the rotation angle of the drum, and measures the force distribution by mapping the portion passing through the through hole according to the rotation angle.

A spray nozzle is placed outside the drum, and an adapter and load cell are placed inside the drum. The injection nozzle sprays the spray toward the adapter, and the spray passes through the through hole of the drum and hits the adapter. At this time, the through hole is formed in an inclined wedge shape (511) rather than a circle, or is formed in a vertical shape (512). The shape of the through hole can be changed depending on the purpose.

The rotating device does not affect the fluid passing through the through hole. For example, the rotating device may be connected to the edge or inner surface of the drum and rotate.

That is, in the third embodiment, the drum having the through hole rotates to control whether a certain portion of the jet passes through. The force distribution of the jet is measured by controlling whether a certain portion of the jet passes through by rotating a drum with a wedge-shaped through hole inclined at an appropriate angle rather than moving an adapter with an inclined portion.

Through this, measurement productivity can be improved depending on the speed of the motor and the fact that the drum, which has through-holes of various shapes rather than moving up, down, left, and right, is rotated in one direction, and the force distribution of the jet can be measured at various angles depending on the purpose. possible. In other words, it is possible to measure the force distribution on the jet from countless angles under a system with sufficient motor speed. Using an appropriate mathematical expression for this result, the 2D distribution of force under sufficient precision can be determined with high precision.

The present invention is not limited to the above-described embodiments, and the scope of application is diverse. Of course, various modifications and implementations are possible without departing from the gist of the present invention as claimed in the claims.

100: Spray nozzle
200: adapter
210: front 220: slope
300: load cell
400: moving part
500: drum
510: Through hole
511: wedge shape 512: vertical shape

Claims (10)

In a fluid force distribution measurement device using a single load cell to measure the force distribution of a jet sprayed from a jet nozzle,
An adapter whose front is disposed perpendicular to the direction of fluid injection, is formed at a corner of the front, and includes an inclined portion formed to become narrower from the front to the back,
A load cell disposed on the rear of the adapter to measure the force received by the adapter,
A moving part disposed at the rear of the load cell and moving vertically and horizontally, and
The position of the injection nozzle is fixed, the adapter is moved in one direction by the moving unit, and includes a control unit that calculates the force distribution of the injection body by measuring the pressure of the injection body according to the position of the adapter,
The control unit is a fluid force distribution measurement device using a single load cell, characterized in that the control unit derives a force according to the Coanda effect through data using a rectangular parallelepiped adapter and data using an adapter in which the inclined portion is formed.
According to paragraph 1,
A fluid force distribution measuring device using a single load cell, wherein the moving part moves in a straight direction so as to pass through the center of the adapter without the adapter being in contact with the jet.
delete According to paragraph 1,
When a portion of the jet hits the front surface and a portion passes without contacting the front surface, the inclined portion is formed at an angle of 45 degrees or more, so that the jet is spaced apart from the side of the adapter and passes through the single load cell. Fluid force distribution measurement device using.
delete In a fluid force distribution measurement device using a single load cell to measure the force distribution of a jet sprayed from a jet nozzle,
A drum whose outer surface is disposed perpendicular to the spraying direction of the jet and includes one or more through holes formed to allow the jet to pass through, and
An adapter disposed inside the drum, the front of which is disposed perpendicular to the direction of fluid injection,
A load cell disposed on the rear of the adapter to measure the force received by the adapter,
a rotating device that rotates the drum, and
A fluid force distribution measurement device using a single load cell including a control unit that measures the force distribution of the jet through the measured value of the load cell according to the rotation angle of the drum.
According to clause 6,
A fluid force distribution measuring device using a single load cell, characterized in that the corners of the through hole are formed in an inclined wedge shape or a vertical shape.
According to clause 6,
The control unit receives the rate of passage of the jet according to the rotation angle of the drum, and measures the force distribution by mapping the part passing through the through hole according to the rotation angle. Fluid force distribution measuring device using a single load cell. .
In the method of measuring fluid force distribution using a single load cell, including the device for measuring fluid force distribution using a single load cell of claim 1,
A spraying step in which the spraying material is sprayed at a certain pressure from the spraying nozzle,
A moving step in which an adapter arranged perpendicular to the injection direction is moved horizontally or vertically by a moving part,
A pressure measurement step in which the load cell disposed on the rear of the adapter moves horizontally or vertically and measures the pressure of the injector, and
A method of measuring fluid force distribution using a single load cell, wherein the control unit includes a force distribution deriving step in which the control unit derives the force distribution of the jet through the pressure measured according to the position of the adapter.
According to clause 9,
The moving step is a method of measuring fluid force distribution using a single load cell, characterized in that the ejection body is moved to pass through the center of the adapter.

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