KR20090010640A - Apparatus and method for monitoring a gas using gas - permeable material - Google Patents

Abstract

An apparatus for monitoring gas is provided to detect the color change by adhering the apparatus to the place or the product where the gas to be monitored presents through miniaturization by using transparent polymer, thereby increasing the portability and measurement simplicity. The apparatus for monitoring gas comprises a first substrate(10) having an indication solution injection part(11) and an indication solution receiving part(13), and a second substrate(20) which is adhered to the single side of the first substrate in which the groove is formed, has the channel through which the indication solution flows and receives, and is formed to react with the indication solution of the first substrate after injection of gas, wherein the indication solution injection part is formed into the groove shape so that the indication solution reacting with the gas to determine the gas is injected; and the indication solution receiving part is connected to the indication solution injection part so that the indication solution injected to the indication solution injection part is received, and is formed into the groove shape.

Description

Apparatus and Method for Monitoring a Gas Using Gas-Permeable Material}

1 is a perspective view schematically showing a gas measuring apparatus according to the present invention.

FIG. 2 is a flowchart schematically illustrating a method of measuring a gas by driving the gas measuring device of FIG. 1. FIG.

3A is a plan view and a cross-sectional view of a manufacturing process of a first substrate of the gas measuring apparatus of FIG. 1.

FIG. 3B is a cross-sectional view of a second substrate in a gas measurement apparatus of FIG. 1. FIG.

3C is a cross-sectional view of a gas measuring device in which the first substrate of FIG. 3A and the second substrate of FIG. 3B are combined;

4 is a perspective view showing an embodiment of a gas measuring apparatus according to the present invention.

FIG. 5A is a plan view and a cross-sectional view of the gas measuring apparatus of FIG. 4 according to a manufacturing process of the first substrate. FIG.

FIG. 5B is a plan view and a sectional view of the gas measurement apparatus of FIG. 4 according to a manufacturing process of the second substrate. FIG.

5C is a cross-sectional view of a gas measuring device in which the first substrate of FIG. 5A and the second substrate of FIG. 5B are combined;

Figure 6 is a perspective view of an embodiment of a gas measurement apparatus according to the present invention.

7 is a flowchart schematically illustrating a method of measuring a gas by driving the gas measuring device of FIG. 6.

8 is a perspective view schematically illustrating a method of measuring a gas by driving the gas measuring apparatus of FIG. 6.

FIG. 9A is a plan view and a cross-sectional view according to a manufacturing process of a first substrate of the gas measuring apparatus of FIG. 6. FIG.

FIG. 9B is a cross-sectional view of a second substrate in a gas measurement apparatus of FIG. 6. FIG.

9C is a cross-sectional view of a gas measuring device in which the first substrate of FIG. 9A and the second substrate of FIG. 9B are combined;

10 is a cross-sectional view showing an embodiment in which the gas measurement device of FIG. 1 is attached to a product.

FIG. 11 is a cross-sectional view of an embodiment in which the gas measuring device of FIG. 6 is attached to a product. FIG.

      <Brief description of reference numerals for the main parts of the drawings>

1: Gas Measuring Device 10: First Substrate

11: Instruction solution injection part 11a: 1st indication solution injection part

11b: second indicator solution injector 11c: third indicator solution injector

11d: fourth indicator solution injector 13: indicator solution receiver

13a: first indicator solution container 13b: second indicator solution container

13c: third indicator solution container 13d: fourth indicator solution container

15: first suction unit 16: the first flow path

17: pressure unit 18: second flow path

19: discharge part 20: second substrate

30: sealing part

The present invention relates to a gas measuring apparatus and method, and more particularly, to a gas measuring apparatus and method that can determine the presence, absence, and type of gas using a substance having a polymer structure.

In general, the method of measuring a gas is a method using an indicator, the chemical reaction of the gas and the indicator can determine the constant state of the gas, and thus the presence, absence and presence of the gas The type can be estimated.

In addition, the indicator may be used in addition to gas, liquid solids, etc., and is used to determine the neutralization point or titrate the concentration of hydrogen ions while titrating, and a noticeable change appears as the situation of the solution changes. Alternatively, the constant state of the substance may be determined by various results, such as an indicator that appears by light emission, an indicator that becomes cloudy or a solution is formed.

In addition, the acidic acid indicator, which is a conventional indicator, changes color according to pH, and the acidic acid indicator itself is made of a weak acid or weak base. When the acidic substance reacts with the weak acid indicator, the concentration of hydrogen ions present in the indicator is high. However, hydrogen is not separated, but reacting with a basic substance decreases the concentration of hydrogen ions in the indicator, so that the hydrogen attached to the indicator is dissociated to increase the number of molecules present in the ionic state.

Therefore, as the acidity of the indicator changes, the molecules whose molecular structure changes, and the molecular structure changes with the color also change, so the approximate pH can be seen by observing this.

However, since the indicator must be directly reacted with the substance, the indicator cannot be confirmed anytime, anywhere, and is not easy to carry, and reacting the indicator directly with the substance causes a change in state and color of the substance, thereby changing the substance. If the gas should be measured, it should not be easily carried out, and if it is necessary to measure the gas, the gas must be directly injected and reacted. There was a problem such as not.

The present invention has been made to solve the above problems, and an object of the present invention is to provide an ultra-small gas measuring apparatus that can measure a gas using a material having a polymer structure.

Another object of the present invention is to provide a gas measuring device that can determine the abnormality of the product by measuring the gas generated in the product.

It is another object of the present invention to provide a gas measuring apparatus and method capable of measuring a gas by increasing the reaction rate with an indicator solution by performing an inhalation process with only an external pressure when the amount of gas is small.

In order to achieve the above object, the present invention provides an indicator solution injecting portion formed in a groove shape so that an indication solution capable of determining a gas by reacting with a gas and an indication solution injected into the indicator solution injecting portion are accommodated. A first substrate connected to the indicator solution injector so as to include an indicator solution receiver formed in a recess shape; A second substrate attached to one surface of the first substrate on which the groove is formed to form a flow path through which the indicator solution can be moved and accommodated, and a gas being introduced to react with the indicator solution of the first substrate; It includes.

The indicator solution injector and the indicator solution receiver of the first substrate may be further provided to correspond to the number of gases to be measured.

The first substrate may include a first suction part which is formed in close proximity to the indicator solution accommodating part and is a space capable of sucking gas in the indicator solution accommodating part by a negative pressure; A pressure unit which is a space in which the negative pressure is generated by an external pressure so that the gas can move to the first suction unit; A discharge part through which one surface of the first substrate penetrates through the first suction part and the pressure part to be discharged to the outside by the pressure applied to the pressure part; It characterized in that it further comprises.

Here, a first flow path for connecting between the first suction portion and the pressure portion; A second flow path connecting the pressure part and the discharge part; It characterized in that it further comprises.

In addition, the second substrate may include a second suction part which is a flow passage perpendicular to the gas inflow direction so that gas may flow into the indicator solution storage part by the negative pressure generated in the pressure part; It characterized in that it further comprises.

In this case, the second suction unit, characterized in that formed in the surface in contact with the indicator solution reservoir.

The liquid crystal display may further include a sealing part sealing one side of the discharge part formed on the outer surface of the first substrate such that the negative pressure is generated in the indicator solution storage part; It characterized in that it further comprises.

The first and second substrates are formed of a material that allows gas to pass but does not allow liquid to pass therethrough.

In this case, the material is characterized in that the material having a polymer structure.

Here, the material having the polymer structure is characterized in that the polydimethylsiloxane (PDMS, poly (dimethylsiloxane)).

In addition, the length in the vertical direction of the surface on which the gas of the second substrate is introduced is characterized in that less than 1mm.

In addition, the coating layer for sealing one side of the indicator solution injecting portion formed on the outer circumferential surface of the first substrate so that the foreign material does not flow into the indicator solution in the indicator solution injection portion; It is characterized in that the further formed.

The indicator solution may be a solution that reacts with the gas and changes the color of the indicator solution according to the characteristics of the gas.

In this case, the indicator solution is characterized in that the acid-based indicator solution that reacts with the gas to change the molecular structure and color of the solution in accordance with the concentration of hydrogen ions.

In addition, the indicator solution is characterized in that the solution to react with carbon dioxide or trimethylamine.

On the other hand, the first step of introducing the indicator solution which can react with the gas to determine the gas through the indicator solution injecting unit which is a fine flow path to the indicator solution receiving unit; A second step of allowing the gas to react with the indicator solution in the indicator solution accommodating part to a second substrate attached to one surface of the first substrate on which the indicator solution injection part and the indicator solution accommodating part are formed; A third step of changing the color of the indicator solution according to the characteristics of the gas and determining the gas by the changed color; It includes.

The first step may include forming the indicator solution injector and the indicator solution receiver so as to correspond to the number of gases to be measured and introducing the indicator solution to correspond to the number of gases to be measured; It characterized in that it further comprises.

And, the second step is a step of inputting the external pressure to the pressure unit which is a space formed in the first substrate spaced apart from the indicator solution receiving portion in order to introduce the gas into the second substrate; Discharging the gas in the pressure unit through a discharge unit configured to discharge the gas in the pressure unit to the outside of the first substrate at a pressure input to the pressure unit; Sealing one side of the discharge part, which is a hole formed in the first substrate, to generate a negative pressure; Sucking the gas in the indicator solution containing part in the first suction part, which is a space formed close to the indicator solution containing part by the generated negative pressure; Allowing gas to flow through the second suction part, which is a flow path formed in the second substrate so that gas may flow into the indicator solution storage part by the suction action of the first suction part; It characterized in that it further comprises.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view schematically illustrating a gas measuring apparatus according to the present invention, and FIG. 2 is a flowchart schematically illustrating a method of measuring a gas by driving the gas measuring apparatus of FIG. 1. As shown in the figure, the gas measuring apparatus 1 according to the present invention comprises a first substrate 10 and a second substrate 20.

The first substrate 10 includes an indicator solution injector 11 and an indicator solution receiver 13.

Here, the indicator solution injector 11 forms a recess groove in the direction of the upper surface of the first substrate 10 such that the indicator solution reacts with the gas to inject the indicator solution into the first substrate 10. However, the yaw groove shape may be changed to a shape capable of forming a flow path through which the indicator solution can move.

In addition, it is preferable that the width of the indicator solution injection part 11 is smaller than the width of the indicator solution accommodation part 13, and it is particularly preferable to form a fine flow path.

The reason is that when the indicator solution is injected into the indicator solution receiver 13 through the indicator solution injector 11, the indicator solution inlet 11 is relatively smaller in width than the indicator solution receiver 13. This is because it can be easily accommodated by the capillary phenomenon.

Further, after the indicator solution is injected from the indicator solution injector 11 into the indicator solution receiver 13, a fine flow path is formed so that the indicator solution does not flow out of the indicator solution receiver 11. Since the mobility of the material is proportional to the cross-sectional area of the flow path, the width can be reduced to reduce the cross-sectional area, and the resistance of the indicator solution can be increased to reduce the mobility of the indicator solution.

After the indicator solution is injected from the indicator solution injector 11 into the indicator solution receiver 13, a fine flow path is provided such that foreign substances do not flow into the indicator solution receiver 13. It is also preferable to form the surface to have hydrophobic properties.

In addition, the indicator solution receiving part 13 forms a recess groove in the direction of the upper surface of the indicator solution injection part 11 so that the indicator solution injected into the indicator solution injection part 11 can be accommodated. .

Here, in order to inject the indicator solution into the indicator solution receiving portion 13, in order to block the foreign substance flows into the indicator solution receiving portion 13 or the indicator solution in the indicator solution receiving portion 13 to the outside. In addition, the coating solution may further include a coating layer formed by a coating process to seal one side of the indicator solution injecting part 11, which is a hole formed in the outer surface of the first substrate 10.

The second substrate 20 is bonded to one surface of the first substrate 10 on which the groove is formed, and the second substrate 20 is formed to form the second solution 20. An outer circumferential surface may be formed.

That is, the outer peripheral surface is formed by attaching the second substrate 20 to the perforated portions of the recessed grooves of the first substrate 10, so that the upper, lower, left, and right surfaces are formed, and thus the indicator solution can move. That flow paths can be formed.

In addition, the second substrate 20 is formed thin so that the gas to react with the indicator solution is introduced, the thickness is preferably formed to 1mm or less.

The reason is that since the lower surface of the indicator solution accommodating portion 13 is the second substrate 20, the indicator solution can react with the indicator solution through the second substrate 20.

In addition, the material constituting the first substrate 10 and the second substrate 20 is a material having a polymer structure that allows gas to pass but does not allow liquid to pass through, in particular polydimethylsiloxane (PDMS) It is preferable to form.

In addition, the indicator solution may react with a gas to change the color of the indicator solution according to the characteristics of the gas, and determine the gas by the changed color. For example, the acidic acid indicator solution may increase or decrease as the acidity of the solution increases. As the molecular structure changes, and as the molecular structure changes, the color of the molecule also changes, indicating the approximate acidity (pH) range.

In addition, the indicator solution may be provided to react with carbon dioxide or trimethylamine, respectively, so as to confirm the presence or absence of gas of carbon dioxide or trimethylamine, and it is preferable to include an indicator solution according to the type of gas to be determined. .

Hereinafter, a gas measuring method using the gas measuring device according to the present invention will be described.

First, by reacting with the gas to be determined, the indicator solution which can confirm the presence or absence of the gas is introduced into the indicator solution storage unit 13 through the indicator solution injection unit 11 (S10).

At this time, after the step (S10), the indicator solution stored in the indicator solution storage unit 13 flows out of the gas measuring device 1, or the external material of the gas measuring device 1 is indicated In order to restrict the flow into the indicator solution in the solution reservoir 13, it is also preferable to form a coating layer by coating one side of the indicator solution injector 11.

In addition, the gas to be determined is introduced into the lower surface of the second substrate 20, and thus the gas passes through the second substrate 20 because the second substrate 20 is formed of a polymer material through which the gas passes. The solution flows into the indicator solution in the indicator solution storage unit 13 (S20).

Here, in the step (S20) it is preferable to position the lower surface of the second substrate 20 to face the point where the gas is generated, because the reason is that if the gas is a small amount and the flow is not directed in a constant direction, very small amount However, the color change of the indicator solution hardly appears due to the reaction with the indicator solution, so that the gas cannot be discriminated, or the flow is not constant, so that it does not flow into the second substrate 20, so that the indicator solution and the gas do not react. Because it can.

In addition, when the color of the indicator solution is changed by reacting the indicator solution with the gas in step S20, the gas may be determined according to the color change, and thus, the type and presence or absence of the gas may be estimated. It becomes (S30).

3A is a plan view and a cross-sectional view according to a manufacturing process of a first substrate of the gas measuring apparatus of FIG. 1, FIG. 3B is a cross-sectional view according to a manufacturing process of a second substrate of the gas measuring apparatus of FIG. 1, and FIG. 3C is a view of FIG. 3A. It is sectional drawing which shows the gas measurement apparatus which combined the 1st board | substrate and the 2nd board | substrate of FIG. 3B. As shown in the figure, the gas measuring apparatus 1 according to the present invention comprises a first substrate 10 and a second substrate 20.

The manufacturing process of the first substrate 10 will be described with reference to FIG. 3A.

First, a silicon wafer (Si-Wafer) having the same size as the upper and lower surfaces of the first substrate 10 to be prepared is prepared.

In addition, spin coating a photo register on a top surface of the silicon wafer, and a portion to which ultraviolet light (UV) is irradiated is cured in order to eject the shape of the first substrate 10. Negative Photo Register is used, SU-8, which can be changed.

Here, in order to form each component to be formed on the first substrate 10 in the spin-coated photoresist by using a photo mask, that is, the indicator solution injector 11 and the indicator solution receiver 13, Ultraviolet rays are irradiated to the solution injection portion 11 and the indicated solution containing portion 13.

At this time, the photo mask is the same as the size of the first substrate 10 to be manufactured to form a characteristic shape by curing the material of the portion through which the ultraviolet light passes at the same time, the first substrate 10 The portion of the indicator solution injector 11 and the indicator solution receiver 13 to be formed in the cavity is drilled to pass ultraviolet rays.

Thus, the ultraviolet rays are irradiated only to the portion where the instruction solution injection section 11 and the instruction solution accommodation section 13 are to be formed, and thus the portion of the section where the instruction solution injection section 11 and the instruction solution accommodation section 13 are to be formed. As the material hardens to harden, a pattern to be produced can be formed.

In addition, the material of the first substrate 10 may be any material having a polymer structure that allows gas to pass but liquid does not pass. In the manufacturing process according to the present invention, polydimethylsiloxane (PDMS) is used. do.

Accordingly, the polydimethylsiloxane (PDMS, PDMS,) may be formed on the photoresist upper surface cured according to the shape of the indicator solution injector 11 and the indicator solution receiver 13 by the thickness of the first substrate 10 to be manufactured. When the poly (dimethylsiloxane) is deposited, the indicator solution injector 11 and the indicator solution receiver 13 are formed in an iron shape, and thus the PDMS is formed in a yaw shape so that a groove is formed. Is achieved.

When the shape of the indicator solution injector 11 and the indicator solution receiver 13 is formed in the PDMS, the silicon wafer and the photoresist are separated from the PDMS, thereby completing the first substrate 10. do.

The manufacturing process of the second substrate 20 will be described with reference to FIG. 3B.

First, a silicon wafer (Si-Wafer) having the same size as the upper and lower surfaces of the second substrate 10 to be manufactured is prepared. Since the second substrate is formed to have the same size as the first substrate 20, the first substrate The silicon wafer of the manufacturing process of the board | substrate 10 may be used.

In this case, the material of the second substrate 10 may be any material having a polymer structure that allows gas to pass but liquid does not pass. In the manufacturing process according to the present invention, polydimethylsiloxane (PDMS) is used. .

In addition, spin coating polydimethylsiloxane (PDMS) on the upper surface of the silicon wafer, and the second substrate 20 is not formed in a specific shape, and the first substrate 10 Since the bottom surface of the substrate 1 is formed, the second substrate 20 is formed by using PDMS without using a photo resistor as in the manufacturing process of the first substrate 10.

In this case, spin coating is made as thin as possible to facilitate gas inflow into the indicator solution receiving part 13. The thickness of the PDMS, that is, the thickness of the second substrate 20 is preferably 1 mm or less.

The silicon wafer is separated from the PDMS, thereby completing the second substrate 20.

Finally, as shown in FIG. 3C, the first substrate 10 and the second substrate 20 are bonded to complete the gas measuring apparatus 1. The shape of the gas permeation device 1 capable of coupling the shape of the drilled portion and the second substrate 20 so as to be in contact with each other, thereby allowing the flow of the indicated solution to be contained therein and discriminating the gas, is completed.

4 is a perspective view showing an embodiment of a gas measuring apparatus according to the present invention, Figure 5a is a plan view and a cross-sectional view according to the manufacturing process of the first substrate of the gas measuring apparatus of Figure 4, Figure 5b is the gas of Figure 4 A plan view and a cross-sectional view according to a manufacturing process of the second substrate of the measuring device, Figure 5c is a cross-sectional view showing a gas measuring device combined the first substrate of Figure 5a and the second substrate of Figure 5b.

As shown in the figure, the gas measuring apparatus 1 according to the present invention comprises a first substrate 10 and a second substrate 20.

The first substrate 10 includes the indicator solution injecting portions 11a, 11b, 11c, and 11d and the indicator solution receiving portions 13a, 13b, 13c, and 13d, and the instruction according to the type of gas to be determined. The solution injector 11 and the indicator solution receiver 13 may be further provided, and in this embodiment, the indicator solution capable of detecting four types of gases may be injected and accommodated to detect four types of gases. Four indicator solution injection parts 11a, 11b, 11c, and 11d and indicator solution receivers 13a, 13b, 13c, and 13d.

At this time, it is preferable that the four types of indicator solutions are indicator solutions capable of detecting gas independently of each other. For example, in the case of using an indicator solution of C which simultaneously reacts with A and B gases, the reaction result is Since the gas of A and B is not easy to distinguish after reacting, it is preferable to provide the indication solution which reacts independently so that it may correspond to each kind of gas.

Here, the first indicator solution injection part 11a is formed on the front left side, and the upper surface direction of the first substrate 10 is injected such that the indicator solution that reacts with the gas on the first substrate 10 may be injected. In order to form a recess groove, the first indicator solution receiving part 13a connected to the first indicator solution injection part 11a is also recessed in the direction of the upper surface of the first substrate 10 so that the indicator solution is received. Iii) forming a groove.

In addition, the second indicator solution injection part 11b is formed on the right front side, and the upper surface direction of the first substrate 10 is injected such that the indicator solution that reacts with the gas on the first substrate 10 may be injected. A recess groove is formed, and the second indicator solution receiver 13b connected to the second indicator solution injection part 11b is also recessed in the direction of the upper surface of the first substrate 10 so that the indicator solution is received. (Iii) form grooves;

In addition, the third indicator solution injection part 11c is formed at the left rear side, and the upper surface direction of the first substrate 10 is injected such that the indicator solution capable of reacting with the gas on the first substrate 10 can be injected. In order to form a groove, the third indicator solution receiving part 13c connected to the third indicator solution injection part 11c may also be recessed in the direction of the upper surface of the first substrate 10 so that the indicator solution is received. Iii) forming a groove.

In addition, the fourth indicator solution injection part 11d is formed at the left rear side, and the upper surface direction of the first substrate 10 is injected such that the indicator solution capable of reacting with the gas on the first substrate 10 to determine the gas is injected. And the fourth indicator solution accommodating portion 13d connected to the fourth indicator solution injection part 11d also has a recess in the direction of the upper surface of the first substrate 10 so as to receive the indicator solution. Iii) forming a groove.

Here, each of the indicator solution receiving parts (13a, 13b, 13c, 13d) is preferably formed spaced at a predetermined thickness interval so that each of the indicator solution is not mixed, each indicator solution injection portion (11a, 11b, 11c, 11d) ) Forms a fine flow path so as to be connected to each of the indicator solution receiving parts 13a, 13b, 13c, and 13d, but each of the indicator solutions is not mixed, and each of the indicator solution injection parts 11a, 11b, 11c, and 11d is It does not cross and can be changed within a range that does not penetrate in the direction of the second substrate 20.

In addition, the width of the indicator solution injecting portions 11a, 11b, 11c, and 11d is preferably smaller than the width of each of the indicator solution receiving portions 13a, 13b, 13c, and 13d. It is desirable to be.

The reason is that when each indicator solution is injected into each indicator solution receiver 13a, 13b, 13c, 13d through each indicator solution injection part 11a, 11b, 11c, 11d, This is because (11a, 11b, 11c, 11d) is formed to have a relatively smaller width than the respective indicator solution accommodating portions 13a, 13b, 13c, and 13d, and thus can be easily accommodated by capillary action.

In addition, after the indicator solution is injected from each of the indicator solution injection sections 11a, 11b, 11c, and 11d into each of the indicator solution receiving sections 13a, 13b, 13c, and 13d, the indicator solution is added to each of the indicator solution injection sections. The fine flow path is formed so as not to flow out of (11a, 11b, 11c, 11d), and since the mobility of the material is proportional to the cross-sectional area of the flow path, the width is reduced to reduce the cross-sectional area and resists the movement of the indicator solution. This is because the mobility of the indicator solution can be reduced by increasing the value.

Then, after the indicator solution is injected from the indicator solution injection sections 11a, 11b, 11c, and 11d into the indicator solution receivers 13a, 13b, 13c, and 13d, an external substance is introduced into the indicator solution receivers 13a, This is because the formation of a fine flow path so as not to flow into 13b, 13c, and 13d) increases resistance to the movement of the foreign material, thereby reducing the possibility of the foreign material entering.

In this case, the indicator solution is injected into each of the indicator solution receivers 13a, 13b, 13c, and 13d, and an external substance flows into or is directed to the indicator solution receivers 13a, 13b, 13c, and 13d. One side of each of the indicator solution injecting portions 11a, 11b, 11c, and 11d formed on the outer surface of the first substrate 10 is disposed so as to block the indication solution in the 13b, 13c, and 13d from flowing out. It is also preferable to further include a coating layer formed by the coating treatment to be sealed.

The second substrate 20 is bonded to one surface of the first substrate 10 on which the groove is formed. The second substrate is formed to form the indicator solution injecting portions 11a, 11b, 11c, and 11d and the respective indicators. The outer circumferential surface of the solution receiving portions 13a, 13b, 13c, and 13d may be formed.

That is, the outer peripheral surface is formed by attaching the second substrate 20 to the perforated portions of the recessed grooves of the first substrate 10, so that the upper, lower, left, and right surfaces are formed, and thus the indicator solution can move. That flow paths can be formed.

In addition, the second substrate 20 is formed thin so that the gas to react with the indicator solution is introduced, the thickness is preferably formed to 1mm or less.

The reason is that since the lower surface of each of the indicator solution accommodating portions 13a, 13b, 13c, and 13d is the second substrate 20, it can react with the indicator solution through the second substrate 20.

In addition, the material constituting the first substrate 10 and the second substrate 20 is a material having a polymer structure that allows gas to pass but does not allow liquid to pass through, in particular polydimethylsiloxane (PDMS) It is preferable to form.

In addition, the indicator solution may react with a gas to change the color of the indicator solution according to the characteristics of the gas, and determine the gas by the changed color. For example, the acidic acid indicator solution may increase or decrease as the acidity of the solution increases. As the molecular structure changes, and as the molecular structure changes, the color of the molecule also changes, indicating the approximate acidity (pH) range.

In addition, the indicator solution may be provided to react with carbon dioxide or trimethylamine, respectively, so as to confirm the presence or absence of gas of the carbon dioxide or trimethylamine, and each of the indicator solutions according to the type of gas to be determined is preferably provided. .

Hereinafter, a gas measuring method using the gas measuring apparatus according to the present embodiment will be described.

First, the four types of indicator solutions capable of identifying the presence or absence of the gas by reacting with the gas to be determined are respectively supplied to the indicator solution receivers 13a, 11b, 11b, 11c, and 11d through the indicator solution injection parts 11a, 11b, 11c, and 11d. 13b, 13c, 13d).

At this time, after the four types of indicator solution is introduced, the indicator solution stored in the indicator solution storage unit 13 flows out of the gas measuring device 1, or the external substance of the gas measuring device 1 In order to restrict the inflow into the indicator solution in the indicator solution receiving parts 13a, 13b, 13c, and 13d, one side of the indicator solution injection parts 11a, 11b, 11c, and 11d may be coated to further form a coating layer. desirable.

In addition, the gas to be determined is introduced into the lower surface of the second substrate 20, and thus the gas passes through the second substrate 20 because the second substrate 20 is formed of a polymer material through which the gas passes. The solution is introduced into the indicator solution in the indicator solution receiving portions 13a, 13b, 13c, and 13d.

At this time, it is preferable to provide a gas and an indication solution capable of discriminating the gas so as to correspond one-to-one, because the gas of arbitrary A and B reacts at the same time with the indication solution of C, which makes the determination difficult. On the contrary, the gas A may react simultaneously with the C and D indicator solutions, and the gas to be determined by D cannot react with D, which may make it impossible to discriminate or the mixed result may be difficult. Because.

Here, it is preferable to position the lower surface of the second substrate 20 so as to face the point where gas is generated, because when the gas is minute and the flow is not directed in a constant direction, only a very small amount reacts with the indicator solution. This is because the color change of the indicator solution hardly appears and thus the gas cannot be discriminated or the flow is not constant, so that it does not flow into the second substrate 20 and thus the indicator solution and the gas may not react.

In addition, when the color of the indicator solution changes due to the reaction of each indicator solution with each gas, the gas can be determined according to the color change, and thus the type and presence or absence of the gas can be estimated.

Hereinafter, the manufacturing process of the gas measuring apparatus which concerns on a present Example is demonstrated.

The manufacturing process of the first substrate 10 will be described with reference to FIG. 5A.

First, a silicon wafer (Si-Wafer) having the same size as the upper and lower surfaces of the first substrate 10 to be prepared is prepared.

In addition, spin coating a photo register on a top surface of the silicon wafer, and a portion to which ultraviolet light (UV) is irradiated is cured in order to eject the shape of the first substrate 10. Negative Photo Register is used, SU-8, which can be changed.

Here, each component to be formed on the first substrate 10 by using a photo mask on the spin-coated photoresist, that is, the indicator solution injectors 11a, 11b, 11c, and 11d and the indicator solution receiver 13a, In order to form 13b, 13c, and 13d, ultraviolet rays are irradiated to the portions of the indicator solution injectors 11a, 11b, 11c, and 11d and the indicator solution receivers 13a, 13b, 13c, and 13d.

At this time, the photo mask is the same as the size of the first substrate 10 to be manufactured to form a characteristic shape by curing the material of the portion through which the ultraviolet light passes at the same time, the first substrate 10 The portions of the indicator solution injectors 11a, 11b, 11c, 11d and the indicator solution receivers 13a, 13b, 13c, and 13d to be formed in the cavity are drilled to pass ultraviolet rays.

Thus, ultraviolet rays are irradiated only to the portions where the indicator solution injecting portions 11a, 11b, 11c, and 11d and the indicator solution receiving portions 13a, 13b, 13c, and 13d are to be formed, and accordingly the indicator solution receiving portions 13a and 13b. , 13c, 13d and the material of the portion where the indicator solution receiving portions 13a, 13b, 13c, and 13d are to be cured and hardened, may form a pattern to be manufactured.

In addition, the material of the first substrate 10 may be any material having a polymer structure through which gas passes but liquid does not pass through. In the manufacturing process according to the present invention, polydimethylsiloxane (PDMS) is used. .

Accordingly, the first substrate 10 to be manufactured on the photoresist upper surface cured according to the shapes of the indicator solution injecting portions 11a, 11b, 11c, and 11d and the indicator solution receiving portions 13a, 13b, 13c, and 13d. By depositing the polydimethylsiloxane (PDMS, poly (dimethylsiloxane)) by the thickness of the), the indicator solution injection section (11a, 11b, 11c, 11d) and the indicator solution receiving section (13a, 13b, 13c, 13d) is iron Since it is formed in the (iii) shape, the PDMS is relatively formed in the yaw shape to form a groove.

When the shape of the indicator solution injection parts 11a, 11b, 11c, and 11d and the indicator solution receivers 13a, 13b, 13c, and 13d is formed in the PDMS, the silicon wafer, the photoresist, and the PDMS are formed. Separation, thereby completing the first substrate 10.

The manufacturing process of the second substrate 20 will be described with reference to FIG. 5B.

First, a silicon wafer (Si-Wafer) having the same size as the upper and lower surfaces of the second substrate 10 to be manufactured is prepared. Since the second substrate is formed to have the same size as the first substrate 20, the first substrate The silicon wafer of the manufacturing process of the board | substrate 10 may be used.

In this case, the material of the second substrate 10 may be any material having a polymer structure that allows gas to pass but liquid does not pass. In the manufacturing process according to the present invention, polydimethylsiloxane (PDMS) is used. .

In addition, spin coating polydimethylsiloxane (PDMS) on the upper surface of the silicon wafer, and the second substrate 20 does not have a specific shape, and the first substrate 10 Since the bottom surface is formed, the second substrate 20 is directly formed using PDMS without using a photo resistor as in the manufacturing process of the first substrate 10.

Here, spin coating is made as thin as possible to facilitate gas inflow into the indicator solution receiving portions 13a, 13b, 13c, and 13d. The thickness of the PDMS, that is, the thickness of the second substrate 20 is 1 mm or less. It is preferable to make it.

The silicon wafer is separated from the PDMS, thereby completing the second substrate 20.

Lastly, as shown in FIG. 5C, the first substrate 10 and the second substrate 20 are bonded to complete the gas measuring apparatus 1. The gas measuring device (1) according to the present embodiment, which is coupled to the perforated portion of the shape and the second substrate 20 in contact with each other, thereby allowing various kinds of the indication solution to be introduced and received, and the gas can be discriminated. Is completed.

FIG. 6 is a perspective view illustrating an example of a gas measuring apparatus according to the present invention, and FIG. 7 is a flowchart schematically illustrating a method of measuring a gas by driving the gas measuring apparatus of FIG. 6. The gas measuring apparatus 1 according to the present embodiment includes a first substrate 10, a second substrate 20, and a sealing unit 30.

As shown in the drawing, the first substrate 10 includes the indicator solution injector 11, the indicator solution receiver 13, the first suction unit 15, the first flow path 16, and the pressure unit 17. ), The second flow path 18 and the discharge unit 19.

Here, the indicator solution injector 11 forms a recess groove in the direction of the upper surface of the first substrate 10 such that the indicator solution reacts with the gas to inject the indicator solution into the first substrate 10. However, the yaw groove shape may be changed to a shape capable of forming a flow path through which the indicator solution can move.

In addition, it is preferable that the width of the indicator solution injection part 11 is smaller than the width of the indicator solution accommodation part 13, and it is particularly preferable to form a fine flow path.

The reason is that when the indicator solution is injected into the indicator solution receiver 13 through the indicator solution injector 11, the indicator solution inlet 11 is relatively smaller in width than the indicator solution receiver 13. This is because it can be easily accommodated by the capillary phenomenon.

In addition, after the indicator solution is injected from the indicator solution injector 11 into the indicator solution receiver 13, the microfluidic channel is formed so that the indicator solution does not flow out of the indicator solution receiver 11. Since the mobility of the material is proportional to the cross-sectional area of the flow path, the width can be reduced to reduce the cross-sectional area, and the resistance of the indicator solution can be increased to reduce the mobility of the indicator solution.

After the indicator solution is injected from the indicator solution injector 11 into the indicator solution receiver 13, a fine flow path is provided such that foreign substances do not flow into the indicator solution receiver 13. It is also preferable to form the surface to have hydrophobic properties.

In addition, the indicator solution receiving part 13 forms a recess groove in the direction of the upper surface of the indicator solution injection part 11 so that the indicator solution injected into the indicator solution injection part 11 can be accommodated. .

Here, in order to inject the indicator solution into the indicator solution receiving portion 13, in order to block the foreign substance flows into the indicator solution receiving portion 13 or the indicator solution in the indicator solution receiving portion 13 to the outside. In addition, the coating solution may further include a coating layer formed by a coating process to seal one side of the indicator solution injecting part 11, which is a hole formed in the outer surface of the first substrate 10.

In addition, the first suction part 15 is formed to be in close proximity to the indicator solution containing part 13, is positioned to abut on the left side of the indicating solution containing part 13, and is provided on the left side of the indicating solution containing part 13. It is preferable to have a right side surface corresponding to an area equal to the area of.

The reason for this is that the amount of gas is small due to the small amount of gas flowing into the indicator solution containing part 13, and thus, when the reaction amount of the indicator solution and the gas decreases or the flow of gas is not constant, the indicator solution containing part 13 If the gas does not reach a), a process of sucking the gas into the indicator solution receiving part 13 is required, and the first suction part 15 performs a suctioning process with a negative pressure on the indicator solution receiving part 13. If the area is not the same or less, the suction force is reduced.

Therefore, the first suction part 15 is formed to be close to the indicator solution receiving part 13, and is formed to be thin in thickness so that gas can pass easily, but the liquid in the indicator solution containing part 13 does not pass. It is preferably formed to have the right side of the same area.

In addition, the first flow path 16 is a passage connecting the first suction part 15 and the pressure part 17 and is formed for the flow of gas between the first suction part 15 and the pressure part 17. .

In addition, the pressure unit 17 is a space for applying pressure from the outside, and is connected to the first suction unit 15 so as to form a negative pressure in the first suction unit 15. Since the first substrate 10 is preferably made of polydimethylsiloxane (PDMS), when the pressure is applied from the upper surface of the pressure unit 17, the pressure unit 17 is raised according to the pressure. , It can be compressed in the downward direction.

Here, since the pressure unit 17 is a place where an external pressure is input, it is preferable that the pressure unit 17 is formed in a shape corresponding to an object to which pressure is applied from the outside or a pressure input means of the user. For example, the pressure of the user is input. In this case, it is preferable to form the pressure unit 17 so as to correspond to the size and shape of the lower surface of the finger, which is a part where the fingerprint of the user is formed.

In addition, the second flow path 18 is a passage connecting the pressure unit 17 and the discharge unit 19 and is formed for the flow of gas between the pressure unit 17 and the discharge unit 19.

In addition, the discharge unit 19 is formed through the outer surface of the first substrate 10 to discharge the gas, when the external pressure is applied to the pressure unit 17 in the up, down direction, left, The gas moves in the right direction, and the gas moved in the right direction is discharged to the discharge unit 19 through the second flow path 18.

In addition, the sealing part 30 is provided to seal the hole formed through the outer surface of the discharge part 19. When an external pressure is applied to the pressure part 17, the gas is discharged through the discharge part 19. In order to generate a negative pressure as much as the amount of gas discharged, a hole of the discharge unit 19 is provided to seal the hole.

Here, the seal 30 may be replaced with an object and a user that can limit the discharge and inflow of gas and air.

The second substrate 20 is bonded to one surface of the first substrate 10 on which the groove is formed, and the second substrate 20 is formed to form the second solution 20. An outer circumferential surface may be formed.

That is, the outer peripheral surface is formed by attaching the second substrate 20 to the perforated portions of the recessed grooves of the first substrate 10, so that the upper, lower, left, and right surfaces are formed, and thus the indicator solution can move. That flow paths can be formed.

In addition, the second substrate 20 is formed thin so that the gas to react with the indicator solution is introduced, the thickness is preferably formed to 1mm or less.

The reason is that since the lower surface of the indicator solution accommodating portion 13 is the second substrate 20, the indicator solution can react with the indicator solution through the second substrate 20.

In addition, the second suction part 21 may be positioned at the position of the second substrate 20 corresponding to the position of the first substrate 10, that is, the second substrate 20 coupled to the lower surface of the first substrate 10. To form a, a plurality of front and rear may be formed so as to facilitate the inflow of gas.

In other words, when a negative pressure for sucking gas from the first suction part 15 to the indicator solution receiver 13 is generated, the second suction part 21 sucks the gas from the indicator solution receiver 13. It is formed to facilitate this.

Here, it is preferable that the second suction part 21 is formed at a position corresponding to the lower surface of the indicator solution receiver 13 because the gas is maximized in the indicator solution in the indicator solution receiver 13. This is to allow a large amount to be introduced.

In addition, the second suction part 21 may be formed to penetrate in the front and rear directions in the present embodiment, and may be changed to a structure in which a large amount of gas may flow into the indicator solution accommodating part 13. , At a position and an area corresponding to the lower surface of the indicator solution receiving part 13, may be formed in a left and right direction, may be formed in an oblique direction, and increase or decrease the number of the plurality of second suction parts 21. It can be done and can be changed in various ways.

In addition, the material constituting the first substrate 10 and the second substrate 20 is a material having a polymer structure that allows gas to pass but does not allow liquid to pass through, in particular, polydimethyl siloxane (PDMS) It is preferable to form.

In addition, the indicator solution may react with a gas to change the color of the indicator solution according to the characteristics of the gas, and determine the gas by the changed color. For example, the acidic acid indicator solution may increase or decrease as the acidity of the solution increases. As the molecular structure changes, and as the molecular structure changes, the color of the molecule also changes, indicating the approximate acidity (pH) range.

In addition, the indicator solution may be provided to react with carbon dioxide or trimethylamine, respectively, so as to confirm the presence or absence of gas of carbon dioxide or trimethylamine, and it is preferable to include an indicator solution according to the type of gas to be determined. .

Hereinafter, a gas measuring method using the gas measuring apparatus according to the present embodiment will be described.

First, by reacting with the gas to be determined, the indicator solution which can confirm the presence or absence of the gas is introduced into the indicator solution storage unit 13 through the indicator solution injection unit 11 (S10).

At this time, after the step (S10), the indicator solution stored in the indicator solution storage unit 13 flows out of the gas measuring device 1, or the external material of the gas measuring device 1 is indicated In order to restrict the flow into the indicator solution in the solution reservoir 13, it is also preferable to form a coating layer by coating one side of the indicator solution injector 11.

Here, it is preferable to prevent the foreign substance from flowing into each component of the first substrate 10 through the discharge unit 19 by using the sealing unit 30.

When the gas to be discriminated is a small amount or the flow of the gas is irregular and thus does not flow into the indicator solution accommodating part 13 through the second substrate 20, the sealing part 30 is opened to open the pressure part 17. ) By using an object from the outside or the user applies pressure in the up and down directions (S21).

Accordingly, the gas in the pressure unit 17 moves in the left and right directions at the pressure input in the up and down directions, and the gas is moved to the discharge unit 19 side since the sealing unit 30 is removed. (S22).

Here, when the gas is discharged to the outside and the sealing part 30 is closed so that external gas does not flow in, the pressure part 17 and the first suction part 15, the first flow path 16, and the second flow path 18. Since the gas that is present in the) and the like is discharged, a negative pressure to inhale the gas by the amount of the discharged gas is generated (S23).

Therefore, when the negative pressure is generated, since the sealing part 30 is closed, the negative pressure to inhale the gas to the indicating solution receiving part 13 instead of the sealing part 30 side acts. Due to the unbalance of the gas distribution of the first suction part 15, the gas moves from the indicator solution receiving part 13 to the first suction part 15 to achieve an equilibrium, and the indicator solution receiving part 13 and the first suction are balanced. Since the part 15 is spaced apart by a partition wall made of a material having a polymer structure, the liquid does not move but the gas moves (S24).

Here, since the indicator solution receiving unit 13 has moved the gas to the first suction unit 15, in order to solve the imbalance of the gas distribution present in the indicator solution receiving unit 13 and the second suction unit 21. Inhalation of the external gas through the second suction unit 21 (S25).

Finally, the external gas is introduced through the second suction part 21 to react with the indicator solution in the indicator solution receiving part 13 by the negative pressure (S26).

If the inflow rate of the external gas is high in step S10, the steps S21, S22, S23, S24, S25, and S26 are not performed.

In addition, when the color of the indicator solution is changed by reacting the indicator solution with the gas in step S26, the gas may be determined according to the color change, and thus the type and presence or absence of the gas may be estimated. It becomes (S30).

FIG. 8 is a perspective view schematically illustrating a method of measuring a gas by driving the gas measuring apparatus of FIG. 6. As shown in the figure, the gas measuring method of the gas measuring apparatus 1 according to the present embodiment starts as follows.

First, as shown in (a), the indicator solution is injected into the indicator solution accommodating part 13 through the indicator solution injecting part 11, and the sealing part 30 is attached to prevent foreign substances from entering.

In (B), when the inflow rate of the external gas is low, the indicated solution and the gas cannot react, and thus, when the reaction result cannot be read, the external pressure must be applied to forcibly inhale the external gas. Before applying the pressure, the sealing part 30 is removed to discharge the internal gas moving in accordance with the pressure to the outside.

As shown in (c), after the sealing part 30 is removed, external gas may flow in, so that when the equipment or the user presses the pressure part 17 immediately (①), the pressure part 17 Existing gas is moved to the left and right by the pressure in the up and down directions, the left side is formed with the indicator solution reservoir 13 and the partition wall made of a polymer structure material, the gas is moved to the right to the discharge portion 19 It is discharged to outside through (②).

Referring to (d), when the gas is discharged and the sealing part 30 is attached immediately, negative pressure is generated as much as the discharged gas.

As shown in (e), since the closed part 30 is clogged, the first suction part 15 moves the gas from the indicator solution storage part 13 in order to balance the gas distribution imbalance (①), Accordingly, the indicator solution storage unit 13 also acts to uniformize the gas distribution between the external gas and the indicator solution storage unit 13 through the second suction unit 21 (2). Inhalation into the storage unit 13 will be able to perform (③).

As shown in (b), the color of the indicator solution changes as the indicator solution reacts with the gas, the presence or absence of the gas can be confirmed according to the color change, and the type of gas can be estimated.

9A is a plan view and a cross-sectional view according to a manufacturing process of the first substrate of the gas measurement apparatus of FIG. 6, FIG. 9B is a cross-sectional view according to a manufacturing process of the second substrate of the gas measurement apparatus of FIG. 6, and FIG. 9C is a view of FIG. 9A. It is sectional drawing which shows the gas measurement apparatus which combined the 1st board | substrate and the 2nd board | substrate of FIG. 9B.

The manufacturing process of the first substrate 10 will be described with reference to FIG. 9A.

First, a silicon wafer (Si-Wafer) having the same size as the upper and lower surfaces of the first substrate 10 to be prepared is prepared.

In addition, spin coating a photo register on a top surface of the silicon wafer, and a portion to which ultraviolet light (UV) is irradiated is cured in order to eject the shape of the first substrate 10. Negative Photo Register is used, SU-8, which can be changed.

Here, each component to be formed on the first substrate 10 by using a photo mask on the spin-coated photoresist, that is, the indicator solution injector 11, the indicator solution receiver 13, and the first suction unit ( 15, the indicator solution injection part 11, the indicator solution receiving part 13, and the first solution path 16 to form the first flow path 16, the pressure part 17, the second flow path 18, and the discharge part 19. 1 An ultraviolet-ray is irradiated to the suction part 15, the 1st flow path 16, the pressure part 17, the 2nd flow path 18, and the discharge part 19 part.

At this time, the photo mask is the same as the size of the first substrate 10 to be manufactured to form a characteristic shape by curing the material of the portion through which the ultraviolet light passes at the same time, the first substrate 10 ), The indicator solution injection section 11, the indicator solution receiving section 13, the first suction section 15, the first flow passage 16, the pressure section 17, the second flow passage 18, The discharge portion 19 is drilled to pass ultraviolet light.

Thus, the indicator solution injector 11, the indicator solution receiver 13, the first suction part 15, the first flow path 16, the pressure part 17, the second flow path 18, and the discharge part 19 are provided. ) Is irradiated with ultraviolet rays only to the portion where the cavities are to be formed. As the material of the portion in which the second flow path 18 and the discharge part 19 are to be formed is hardened and hardened, a pattern to be manufactured may be formed.

In addition, the material of the first substrate 10 may be any material having a polymer structure through which gas passes but liquid does not pass through. In the manufacturing process according to the present invention, polydimethylsiloxane (PDMS) is used. .

Accordingly, the indicator solution injector 11, the indicator solution receiver 13, the first suction part 15, the first flow path 16, the pressure part 17, the second flow path 18, and the discharge part ( When the polydimethylsiloxane (PDMS, poly (dimethylsiloxane)) is deposited on the upper surface of the photoresist cured according to the shape of 19) by the thickness of the first substrate 10 to be manufactured, the indicator solution injection part 11 , The indicator solution receiving part 13, the first suction part 15, the first flow path 16, the pressure part 17, the second flow path 18, and the discharge part 19 are formed in an iron shape. Therefore, the PDMS is relatively formed in a yaw shape to form a groove.

In addition, the indicator solution injector 11, the indicator solution receiver 13, the first suction part 15, the first flow path 16, the pressure part 17, the second flow path 18 to the PDMS, Once the shape of the discharge unit 19 is formed, the silicon wafer and the photoresist are separated from the PDMS, thereby completing the first substrate 10.

The manufacturing process of the second substrate 20 will be described with reference to FIG. 9B.

First, a silicon wafer (Si-Wafer) having the same size as the upper and lower surfaces of the second substrate 10 to be manufactured is prepared. Since the second substrate is formed to have the same size as the first substrate 20, the first substrate The silicon wafer of the manufacturing process of the board | substrate 10 may be used.

In this case, the material of the second substrate 10 may be any material having a polymer structure that allows gas to pass but liquid does not pass. In the manufacturing process according to the present invention, polydimethylsiloxane (PDMS) is used. .

In addition, spin coating a photo register on a top surface of the silicon wafer, and a portion irradiated with ultraviolet rays (UV) to cure the shape of the second substrate 20 is cured. Negative Photo Register is used, SU-8, which can be changed.

In this case, spin coating is made as thin as possible to facilitate gas inflow into the indicator solution receiving part 13. The thickness of the PDMS, that is, the thickness of the second substrate 20 is preferably 1 mm or less.

Here, in order to form a component to be formed on the second substrate 20 by using a photo mask on the spin-coated photoresist, that is, the second suction part 21, ultraviolet rays are formed on the second suction part 21. Investigate

In this case, the photomask is the same as the size of the second substrate 20 to be manufactured to form a characteristic shape by curing the material of the portion through which the ultraviolet light passes and at the same time, the second substrate 20 The portion of the second suction part 21 to be formed in the cavity) is drilled to allow ultraviolet rays to pass therethrough.

Thus, ultraviolet rays are irradiated only to the portion where the second suction unit 21 is to be formed, and thus the material of the portion where the second suction unit 21 is to be formed is hardened and hardened, thereby forming a pattern to be manufactured. have.

Accordingly, when the polydimethylsiloxane (PDMS) is deposited on the upper surface of the photoresist cured according to the shape of the second suction unit 21 by the thickness of the second substrate 20 to be manufactured, the polydimethylsiloxane (PDMS) is deposited. Since the second suction part 21 is formed in an iron shape, the PDMS is relatively formed in a yaw shape to form a groove.

When the shape of the second suction unit 21 is formed in the PDMS, the silicon wafer and the photoresist are separated from the PDMS, thereby completing the second substrate 20.

Finally, as shown in FIG. 9C, the first substrate 10 and the second substrate 20 are bonded to complete the gas measuring apparatus 1. ) Is formed such that the perforated portion of the shape and the opposite side of the surface on which the second suction part 21 of the second substrate 20 is formed are in contact with each other, and thus the indicator solution can be introduced and received, and the gas can be determined. The gas measuring device 1 is completed.

FIG. 10 is a cross-sectional view illustrating an example in which the gas measuring apparatus of FIG. 1 is attached to a product. As shown in the figure, an example in which the gas measuring device 1 according to the present embodiment is applied to a stored food is shown.

Here, although the shelf life is described in the expiration date, defective products may occur during the distribution process and the manufacturing process, and thus the consumer may consume the stored food before the expiration date, and thus the gas according to the present invention may be applied to the stored food. The measuring device 1 is applied.

At this time, in the present embodiment, an indication solution for detecting trimethylamine, which is a gas having a rotting smell, is used.

In addition, when the stored food before the expiration date is damaged in the distribution process, or when a defect in the production process or a storage problem occurs during the distribution process, the microorganisms multiply, and thus the stored food may decay. Attach the gas measuring device (1) to which the indicated solution which can confirm the presence or absence of the injected solution to the stored food.

If the expiration date has not elapsed, and the trimethylamine occurs as described above, the trimethylamine reacts with the indicator solution, the color changes, and the warning message according to the color change may be used to determine the degree of corruption of the food. have.

FIG. 11 is a cross-sectional view illustrating an example in which the gas measuring device of FIG. 6 is attached to a product. As shown in the figure, an example in which the gas measuring device 1 according to the present embodiment is applied to a stored food is shown.

Here, although the shelf life is described in the expiration date, defective products may occur during the distribution process and the manufacturing process, and thus the consumer may consume the stored food before the expiration date, and thus the gas according to the present invention may be applied to the stored food. The measuring device 1 is applied.

At this time, in the present embodiment, an indicator solution called BTB (BromoThoymol Blue) for detecting carbon dioxide (CO ₂ ) is used.

In addition, when the stored food before the expiration date is damaged in the distribution process, or when a defect in the production process or a storage problem occurs during the distribution process, the microorganisms multiply, and thus the stored foods may decay. When the gas measuring device (1) is injected into the stored food is injected with the indicator solution (BTB) that can determine the presence or absence of carbon dioxide as a result of respiration.

If, even if the expiration date has not passed, if the above case occurs and carbon dioxide is generated, the carbon dioxide reacts with the indicator solution to change the color, see the warning message according to the color change, it is possible to determine the degree of corruption of the food.

Here, although the amount of carbon dioxide due to microbial propagation is so small that the food actually decays, when the carbon dioxide reacts with the indicator solution so little that the presence or absence of carbon dioxide cannot be determined, the user opens the discharge unit 19 and presses the “PUSH. The part described by ′ with a finger and close the discharge unit 19 again.

In this manner, the gas measuring device 1 according to the present invention inhales the gas inside the package, and when the color of the indicator solution changes, the gas measuring device 1 detects carbon dioxide. The warning phrase according to the color change described can determine whether the corruption, if the color does not change because the gas measuring device (1) does not detect carbon dioxide, it can be confirmed that the food does not generate carbon dioxide due to microbial propagation. have.

And, when detecting the carbon dioxide using the BTB indicator solution, the embodiment of the warning phrase according to the color change is shown in Table 1 below.

color Status of the product blue safety green safety yellow danger

Here, the color represents the color of the indicator solution, and the state of the product is described in three stages, but it is preferable to increase the level to classify more accurately, insert it using a color palette, and the consumer can contrast by color. It is also preferable to be provided so that.

While the exemplary embodiments of the present invention have been described above by way of example, the scope of the present invention is not limited to these specific embodiments, and a person skilled in the art is appropriate within the scope described in the claims of the present invention. It will be possible to change.

As described above, the present invention having the configuration as described above stores an indication solution in a polymer-structured material to determine a gas, and allows the gas to be measured at any time and anywhere in real time since the reaction result can be known. By miniaturization using a transparent polymer material, it is possible to measure the color change by attaching it to the place or product where the gas to be measured is located, thereby increasing portability and ease of measurement, and when applied to the product, included in the product. This can be used to determine the abnormality of the product, thereby increasing the reliability of the product, and the simple manufacturing process can reduce the cost of the device for gas reaction confirmation, and other expensive equipment for gas reaction confirmation It is possible to achieve such effects as not required.

Claims (18)

Is connected to the indicator solution injection unit is formed in the groove shape so that the indicator solution that can react with the gas to determine the gas and the indicator solution injected into the indicator solution injection unit is accommodated, A first substrate including an indicator solution accommodating portion formed in a shape; A second substrate attached to one surface of the first substrate on which the groove is formed to form a flow path through which the indicator solution can be moved and accommodated, and a gas being introduced to react with the indicator solution of the first substrate; Gas measuring device comprising a. The method according to claim 1, The indicator solution injection portion and the indicator solution receiving portion of the first substrate is further provided to correspond to the number of gases to be measured. The method according to claim 1, The first substrate A first suction part which is formed in close proximity to the indicator solution receiving part and is a space capable of sucking gas in the indicator solution containing part by a negative pressure; A pressure unit which is a space in which the negative pressure is generated by an external pressure so that the gas can move to the first suction unit; A discharge part through which one surface of the first substrate passes through the first suction part and the pressure part to be discharged to the outside by the pressure applied to the pressure part; Gas measuring apparatus further comprises a. The method according to claim 3, A first flow path connecting the first suction part and the pressure part; A second flow path connecting the pressure part and the discharge part; Gas measuring apparatus further comprises a. The method according to claim 3, The second substrate is A second suction part which is a flow path perpendicular to the gas inflow direction so that gas may flow into the indicator solution storage part by the negative pressure generated in the pressure part; Gas measuring device further comprises a. The method according to claim 5, 2. The gas measuring device of claim 2, wherein the second suction unit is formed in plural in contact with the indicator solution reservoir. The method according to claim 3, A sealing part sealing one side of the discharge part formed on an outer surface of the first substrate such that the negative pressure is generated in the indicator solution storage part; Gas measuring apparatus further comprises a. The method according to any one of claims 1 to 6, The first and second substrates are gas measurement apparatus, characterized in that formed of a material that allows the gas to pass through, but not through the liquid. The method according to claim 8, The material is a gas measuring device, characterized in that the material having a polymer structure. The method according to claim 9, The material having the polymer structure is a polydimethylsiloxane (PDMS, poly (dimethylsiloxane)) gas measurement device, characterized in that. The method according to any one of claims 1 to 6, The length of the vertical direction of the surface into which the gas of the said 2nd board | substrate flows is 1 mm or less, The gas measuring apparatus characterized by the above-mentioned. The method according to claim 1 or 2, A coating layer for sealing one side of the indicator solution injecting unit formed on the outer circumferential surface of the first substrate such that an external material does not flow into the indicator solution in the indicator solution injecting unit; Gas measurement device, characterized in that further formed. The method according to claim 1, And the indicator solution is a solution that reacts with the gas to change the color of the indicator solution according to the characteristics of the gas. The method according to claim 1, And the indicator solution is an acidic indicator solution that reacts with the gas and changes its molecular structure and color according to the concentration of hydrogen ions. The method according to claim 1, And said indicator solution is a solution for reacting with carbon dioxide or trimethylamine. A first step in which the indicator solution capable of reacting with the gas and flowing into the indicator solution accommodating part through the indicator solution injector, which is a fine flow path, is provided; A second step of allowing the gas to react with the indicator solution in the indicator solution accommodating part to a second substrate attached to one surface of the first substrate on which the indicator solution injection part and the indicator solution accommodating part are formed; A third step of determining a gas in the changed color when the color of the indicator solution changes according to the characteristics of the gas; Gas measurement method comprising a. The method according to claim 16, The first step is Forming an indicator solution corresponding to the number of gases to be measured, wherein the indicator solution injection unit and the indicator solution receiving unit are introduced; Gas measurement method characterized in that it further comprises. The method according to claim 16, The second step is Inputting an external pressure to a pressure part, which is a space formed on the first substrate, spaced apart from the indicator solution accommodating part, to introduce gas into the second substrate; Discharging the gas in the pressure unit through a discharge unit configured to discharge the gas in the pressure unit to the outside of the first substrate at a pressure input to the pressure unit; Sealing one side of the discharge part, which is a hole formed in the first substrate, to generate a negative pressure; Sucking the gas in the indicator solution containing part in the first suction part, which is a space formed close to the indicator solution containing part by the generated negative pressure; Allowing gas to flow through the second suction part, which is a flow path formed in the second substrate so that gas may flow into the indicator solution storage part by the suction action of the first suction part; Gas measurement method, characterized in that consisting of.

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