KR102082772B1 - Apparatus for measuring transepidermal water loss including correction function - Google Patents

Abstract

An airtight chamber including a contact portion in contact with the skin on one side;
A relative humidity sensor for detecting a change amount of moisture in the sealed chamber;
A temperature measuring sensor installed inside the hermetic chamber to detect a changed temperature;
A pressure control hole having a predetermined size so that the air corresponding to the increased pressure is discharged when the heated air increases the pressure in the hermetic chamber according to the temperature of the skin contacting the contact portion on one side of the hermetic chamber; And
A control unit for detecting the amount of discharged air that is air discharged through the pressure adjusting hole and calculating and correcting moisture included in the amount of discharged air;
Disclosed is a transdermal moisture loss measuring device including a correction function including a.

Description

Transdermal moisture loss measuring device with correction function {APPARATUS FOR MEASURING TRANSEPIDERMAL WATER LOSS INCLUDING CORRECTION FUNCTION}

The present technology relates to a transdermal moisture loss measuring device capable of measuring the amount of moisture lost at the surface of the skin.

The skin is located at the outermost part of the human body and performs important functions such as preventing the invasion of bacteria and harmful substances from the outside, waterproofing and temperature control. This function is called skin barrier function, and transdermal moisture loss is an indicator of the level of skin barrier function.

When the function of the skin barrier is deteriorated, that is, when the amount of transdermal moisture is large, the penetration of external allergens through the skin is facilitated and causes various skin diseases such as atopic symptoms. Especially important. In addition, newborns with high transdermal moisture loss have a high prevalence of atopic dermatitis, and the prevalence can be halved by proper moisturizing management.

The stratum corneum of the skin surface has a water content of about 20 to 70%. However, the air on the skin has a lower moisture content than the skin so that the moisture on the surface of the skin evaporates and diffuses into the air. Thus, conventionally, after placing an open or closed chamber on the skin, the humidity change when the moisture on the surface of the skin evaporates was measured in the chamber to determine the amount of water loss of the transdermal.

In particular, since the accuracy of the hermetic chamber is higher than that of the open chamber, the hermetic chamber is mainly utilized. In this way, when the closed chamber is positioned to cover the skin of a certain part, the skin moisture is evaporated in the chamber and diffused in the air, thereby detecting the amount of transdermal moisture loss by measuring the rate of increase of humidity increased in the chamber.

However, the method of measuring the amount of transdermal moisture loss according to the prior art has a problem that the reliability of the measurement result is lowered as a phenomenon in which the pressure inside the hermetic chamber changes.

Specifically, since the temperature of the human body or the temperature of the skin is generally maintained higher than the ambient air temperature, when the closed chamber is positioned to cover the skin of a certain portion to measure the amount of water loss, the temperature inside the chamber is increased.

As the temperature inside the hermetic chamber rises, the measurement atmosphere changes, such as an increase in the internal pressure. Therefore, the amount of transdermal moisture loss measured at this time is inevitably deteriorated, such as a high error rate and a drop in accuracy.

Japanese Laid-Open Patent Publication No. 2012-085983 (body perspiration monitor device) Korean Patent Application Publication No. 10-2016-0069506 "skin condition measuring system" Domestic patent registration number "10-1736344" "Apparatus for measuring skin information"

It is an object of the present invention to prevent air in a hermetically sealed chamber measuring moisture loss of the transdermal body from being heated by the temperature of the skin to change the pressure rapidly.

In addition, an object of the present invention is to calculate the moisture contained in the air discharged for pressure control in the hermetic chamber and to reflect the calculated amount of moisture in the measured moisture loss of the skin to obtain an accurate data value.

The technical problem to be achieved by the present invention is not limited to the technical problem mentioned above, and other technical problems not mentioned above may be clearly understood by those skilled in the art from the following description. will be.

The transdermal moisture loss measuring device including the inventor's correction function includes a hermetically sealed chamber, a relative humidity sensor, a temperature measuring sensor, a pressure adjusting hole, and a controller.

The present invention is a transdermal moisture loss measuring device including a correction function in a hermetically sealed chamber including a contact portion in contact with the skin at one side of the relative humidity sensor for detecting the amount of change of the moisture in the hermetically sealed chamber, which is installed inside the hermetic chamber and is changed in temperature. Temperature measuring sensor for detecting a pressure of a predetermined size to discharge the air corresponding to the increased pressure when the air heated in accordance with the temperature of the skin contacted by the contact portion on the side of the hermetic chamber increases the pressure in the hermetic chamber And a control unit for detecting an amount of discharged air that is air discharged through the adjustment hole and the pressure adjusting hole, and calculating and correcting moisture lost from the skin included in the discharged air amount.

Here, the temperature measuring sensor measures the temperature inside the closed chamber, and when the skin is in contact with the contact, it is characterized in that for measuring the temperature inside the closed chamber again.

Here, the control unit includes a correction function including a discharge air amount calculation unit connected to the temperature measuring sensor to measure the temperature in the changed chamber to detect the discharge air amount discharged through the pressure adjusting hole.

Here, the exhaust air amount calculating unit multiplies the volume of the temperature measured by the temperature measuring sensor to the volume inside the sealed chamber, divides it by the temperature before the change, and calculates a volume value of the exhaust air.

Here, the control unit includes a humidity amount calculation unit connected to the relative humidity sensor to calculate the change humidity in the hermetic chamber.

Here, the control unit includes a loss calculating unit for calculating the amount of water lost by multiplying the discharge air volume value and the change humidity amount.

Here, the control unit includes a moisture level calculation unit for detecting the change in the moisture in the hermetic chamber measured by the relative humidity sensor to measure the transdermal moisture lost in the skin in contact with the contact portion, the loss calculation unit calculated Characterized in that the amount of water and output the sum of the moisture calculation unit calculated.

Here, the loss calculating unit calculates the water discharged through the pre-stored correction equation, the correction equation is (T2-T1) / T1 * K * (H2-H1) * V1, T2 in the correction equation Means the temperature in the hermetic chamber elevated by, T1 means the temperature in the hermetic chamber before skin contact, K is a constant, H2 is the amount of humidity raised by moisture evaporated after skin contact, and H1 is Humidity of the chamber before skin contact, characterized in that V1 is the volume in the hermetic chamber.

Transdermal moisture loss measuring device including a correction function according to an embodiment of the present invention formed through the above-described configuration prevents the internal pressure of the hermetic chamber from suddenly changed by the temperature of the skin, and accurately lost from the transdermal Moisture can be measured.

1 is a cross-sectional view of a transdermal moisture loss measuring device including the inventor's correction function.
Figure 2 shows the control unit of the transdermal moisture loss measuring device including the inventors correction function.
Figure 3a is a view showing when the skin in contact with the contact portion of the transdermal moisture loss measuring device including the present inventors correction function, Figure 3b is a pressure control hole of the transdermal moisture loss measuring device including the inventors correction function It is shown that the pressure is controlled through.

Hereinafter, an embodiment of the present invention will be described in detail through exemplary drawings. However, this is not intended to limit the scope of the invention.

In adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used to refer to the same components as much as possible, even if displayed on different drawings. In addition, in describing the present invention, if it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

In addition, the size or shape of the components shown in the drawings may be exaggerated for clarity and convenience of description. In addition, terms that are specifically defined in consideration of the configuration and operation of the present invention are only intended to describe embodiments of the present invention, and do not limit the scope of the present invention.

Throughout the specification, when a part is said to "include" a certain component, it means that it can further include other components, except to exclude other components unless specifically stated otherwise. In addition, the terms “… unit”, “… unit”, “module”, “device”, and the like described in the specification mean a unit that processes at least one function or operation, which is implemented by a combination of hardware and / or software. Can be.

1 is a cross-sectional view of a transdermal moisture loss measuring device including the inventor's correction function.

Figure 3a is a view showing when the skin in contact with the contact portion of the transdermal moisture loss measuring device including the present inventors correction function, Figure 3b is a pressure control hole of the transdermal moisture loss measuring device including the inventors correction function It is shown that the pressure is controlled through.

The transdermal moisture loss measuring apparatus including the present inventors correction function includes a hermetically sealed chamber 120, a temperature measuring sensor 150, a relative humidity sensor 160, a pressure adjusting hole 130, and a controller 110.

The hermetic chamber 120 is formed in a set shape. In one example, the hermetic chamber 120 may be formed in the shape of a rectangular parallelepiped. Here, the outer shape of the hermetic chamber 120 is not a problem if it is a set shape, it can be naturally formed in a cylindrical, octagonal shape, etc. in addition to the cuboid shape.

The hermetic chamber 120 includes a contact 140. The contact portion 140 of the hermetic chamber 120 may be the only open portion of the hermetic seal of the hermetic chamber 120. When the skin contacts the contact portion 140 of the hermetic chamber 120, the inner space of the hermetic chamber 120 is closed by the inner surface of the hermetic chamber 120 and the skin.

Moisture on the surface of the skin is evaporated and diffused through the contact 140 of the hermetic chamber 120. One side of the inside of the hermetic chamber 120 is provided with a relative humidity sensor 160 for measuring the moisture that changes according to the moisture evaporated from the surface of the skin. The relative humidity sensor 160 may detect the amount of moisture evaporated from the surface of the skin through the amount of change of the moisture inside the sealed chamber 120.

However, since the temperature of the atmosphere and the temperature of the skin are different, if there is no hole communicating with the outside in the hermetic chamber 120 and the skin is in contact with the contact portion 140 of the hermetic chamber 120, the adjacent air of the contact portion 140 is present. Is heated to temperature to change the pressure inside the chamber. Therefore, an error occurs in the amount of change in the moisture of the hermetic chamber 120 measured by the relative humidity sensor 160 installed in the hermetic chamber 120.

In order to prevent this, the present invention forms a pressure control hole 130 having a fine size in the hermetic chamber 120. When the air of the contact portion 140 of the hermetic chamber 120 is heated by the skin it will be obvious that the pressure is increased by the corresponding amount.

In order to eliminate the aforementioned error, the air corresponding to the increased pressure may be discharged to the outside. The present invention has formed a pressure control hole 130 of a fine size for this purpose. The pressure adjusting hole 130 is formed in plural. The pressure adjusting hole 130 should be formed in a set size. The reason for this is to prevent the low humidity air outside the hermetic chamber 120 from being introduced into the hermetic chamber 120.

The pressure adjusting hole 130 is a passage that communicates with the outside only when the skin comes into contact with the contact portion 140 of the hermetic chamber 120. Therefore, air is discharged through the pressure adjusting hole 130. However, another problem arises here. This is because the discharged air, which is the air discharged through the pressure control hole 130, also includes the lost moisture evaporated by the skin.

Therefore, if it is not corrected, the moisture evaporated from the skin generates errors as much as the moisture contained in the discharged air discharged through the pressure adjusting hole 130.

Figure 2 shows the control unit of the transdermal moisture loss measuring device including the inventors correction function.

The present invention includes a control unit 110. The controller 110 calculates the moisture contained in the discharged air and corrects the measured skin moisture loss amount.

On the other hand, in order to calculate the moisture contained in the discharged air as described above, the control unit 110 should measure the temperature inside the hermetic chamber 120. Here, the reason why the pressure is not measured is because the pressure regulating hole 130 is formed in the hermetic chamber 120 so that the pressure is always maintained at atmospheric pressure.

Therefore, the temperature measuring sensor 150 is installed in the hermetic chamber 120. The temperature measuring sensor 150 measures the temperature of the interior of the hermetic chamber 120 at least twice. If the temperature in the hermetic chamber 120 is named T1 and the temperature in the hermetic chamber 120 raised by the skin is named T2 before the skin is contacted, the temperature measuring sensor 150 measures T1 and contacts the skin. Then measure T2.

The controller 110 is connected to the temperature measuring sensor 150 and the relative humidity sensor 160. The control unit 110 includes an exhaust air amount calculating unit 112, a loss calculating unit 113, and a moisture content calculating unit 114.

The exhaust air amount calculating unit 112 of the control unit 110 calculates a volume change of air linearly discharged as the temperature increases. The control unit 110 changes the temperature change value, which is the difference between the temperature T1 in the hermetic chamber 120 before contacting the skin at the temperature T2 in the hermetic chamber 120 elevated by the skin through the temperature measuring sensor 150 ( Calculate T2-T1, multiply the temperature change value T2-T1 by V1, the volume of the hermetic chamber 120, and subtract the temperature T1 in the hermetic chamber 120 before contacting the skin. To calculate the amount of exhaust air.

The controller 110 is connected to the relative humidity sensor 160 and the temperature measuring sensor 150. The humidity calculator 111 of the controller 110 calculates an absolute humidity changed by evaporated moisture of the skin. The relative humidity sensor 160, the temperature measuring sensor 150, and the humidity calculator 111 refer to the absolute humidity in the hermetic chamber 120 as H1 before the skin comes into contact with the skin, and the skin contacts the contact part 140. When the absolute humidity amount changed in the sealed chamber 120 due to evaporated water is named H2, the humidity amount calculation unit uses the relative humidity amount measured by the relative humidity sensor 160 and the temperature value measured by the temperature measurement sensor 150. 111 calculates H1 and calculates H2.

The humidity calculation unit 111 of the control unit 110 measures the amount of humidity in the closed chamber 120 before the skin is contacted at the changed humidity in the closed chamber 120 by moisture evaporated after the skin contacts the contact unit 140. Calculate the difference. Water in the hermetic chamber 120 is evenly distributed in the hermetic chamber 120. The same may be true of moisture trapped in the hermetic chamber 120 by evaporation from the skin. This will be the same for the amount of air discharged through the pressure adjusting hole 130.

Using this, the loss calculating unit 113 of the control unit 110 calculates the change humidity value calculated by the humidity calculating unit 111 to the discharge air amount calculated by the exhaust air calculating unit 112 to discharge the pressure to adjust the pressure. Calculate the amount of water lost in the discharged air.

The controller 110 outputs by performing a calculation that finally adds the changed amount of moisture included in the discharged air calculated as described above to the amount of moisture lost from the detected skin. This is performed by the moisture level calculator 114 of the controller 110.

The moisture level calculator 114 is connected to the relative humidity sensor 160. Therefore, by using the rate of change of the amount of moisture in the closed chamber 120 to measure the amount of water (WL1) lost in the skin, and then calculated based on the values measured by the exhaust air amount calculation unit 112, the humidity amount calculation unit 111 The amount of drained water (WL2) is added together to finally output the amount of water lost from the skin.

According to the present invention, while maintaining the pressure in the hermetic chamber 120 through the pressure discharge hole as described above, it is possible to accurately measure the moisture lost from the skin.

On the other hand, if the loss calculation unit 113 of the control unit 110 to calculate the output value can be arranged in a correction equation. The correction equation is as follows.

[Correction formula]

Discharge moisture content (WL2) = (T2-T1) / T1 * K * (H2-H1) * V1

Here T2 means the temperature in the closed chamber 120 raised by the skin, T1 means the temperature in the closed chamber 120 before skin contact, K is a constant, H2 is the moisture evaporated after the skin contacted Is the amount of absolute humidity raised by H1, H1 is the absolute humidity of the chamber before skin contact, and V1 is the volume in the hermetic chamber 120.

While the invention has been shown and described with respect to particular embodiments, it will be appreciated that various changes and modifications can be made in the art without departing from the spirit of the invention provided by the following claims. It will be self-evident for those of ordinary knowledge.

110: control unit 111: humidity calculation unit
112: discharge air amount calculation unit 113: loss calculation unit
114: moisture content calculator 120: closed chamber
130: pressure adjustment hole 140: contact portion
150: temperature measurement sensor 160: relative humidity sensor

Claims (8)

An airtight chamber including a contact portion in contact with the skin on one side;
A relative humidity sensor for detecting a change amount of moisture in the sealed chamber;
A temperature measuring sensor installed inside the hermetic chamber to detect a changed temperature;
A pressure control hole having a predetermined size so that the air corresponding to the increased pressure is discharged when the heated air increases the pressure in the hermetic chamber according to the temperature of the skin contacting the contact portion on one side of the hermetic chamber; And
And a control unit for detecting an amount of discharged air, which is air discharged through the pressure adjusting hole, and calculating and correcting moisture included in the amount of discharged air.
The temperature measuring sensor
Measuring the temperature inside the hermetic chamber and re-measuring the temperature inside the hermetic chamber when the skin is in contact with the contact portion
Percutaneous moisture loss measuring device comprising a correction function characterized in that. delete The method of claim 1,
The control unit,
And a correction function including a discharge air amount calculating unit connected to the temperature measuring sensor and measuring a temperature in the changed chamber to detect the amount of discharged air discharged through the pressure adjusting hole. The method of claim 3,
The discharge air amount calculation unit,
Calculating a volume value of exhaust air by multiplying the change in temperature measured by the temperature measuring sensor to the volume inside the closed chamber and dividing by the temperature before the change.
Percutaneous moisture loss measuring device comprising a correction function characterized in that. The method of claim 4, wherein
The control unit,
A transdermal moisture loss measuring device connected to the relative humidity sensor and including a correction function including a humidity amount calculation unit for calculating the change in humidity in the hermetic chamber. The method of claim 5,
The control unit
Loss calculation unit for calculating the amount of water lost by multiplying the discharge air volume value and the change humidity amount
Transdermal moisture loss measuring device comprising a correction function comprising a. The method of claim 6,
The control unit
And a moisture level calculator for detecting a change in moisture in the hermetically sealed chamber measured by the relative humidity sensor and measuring transdermal moisture lost from the skin in contact with the contact portion.
Outputting the amount of lost water calculated by the loss calculator by adding the value calculated by the water calculator
Percutaneous moisture loss measuring device comprising a correction function characterized in that. The method of claim 6,
The loss calculating unit
It is characterized by calculating the moisture discharged through the pre-stored correction formula
The correction formula is
[Correction formula]
(T2-T1) / T1 * K * (H2-H1) * V1
In the correction formula, T2 means the temperature in the closed chamber raised by the skin, T1 means the temperature in the closed chamber before skin contact, K is a constant, and H2 is raised by the evaporated water after the skin is contacted. Humidity amount, H1 is the amount of humidity of the chamber before the skin contact, V1 is a transdermal moisture loss measuring device comprising a correction function, characterized in that the volume in the closed chamber.

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