KR20110085066A - Potable device for automatically measuring moisture on skin and the same method thereof - Google Patents

Abstract

PURPOSE: A portable device and method for automatically measuring skin moisture are provided to improve the accuracy of a device by minimizing noises. CONSTITUTION: An array electrode unit(100) is contacted with skin and outputs current to the skin. The array electrode unit measures voltages generated based on the current outputted to the skin. A control device(200) calculates impedance by the current outputted to the skin and voltages measured by the array electrode unit and outputs skin moisture by a skin moisture expression. An image display device(300) displays the skin moisture outputted from the control device.

Description

Portable device for automatically measuring moisture on skin and the same method

The present invention relates to a portable skin moisture automatic measuring device and a method thereof, and more particularly to a portable skin moisture automatic measuring device and method for automatically calculating the impedance of the skin upon contact with the skin to measure the moisture content of the skin It is about.

The condition of the skin is closely related to the moisture level of the stratum corneum, so it is very important to measure the moisture level of the stratum corneum. As a general method for measuring moisture in the stratum corneum, there are an electrical measurement method, an optical measurement method, and a method using MRI.

Electrical measurement method is generally used to measure the moisture of the stratum corneum, a method of measuring the moisture level of the skin by applying a low-frequency sine wave to the skin and measuring the susceptance which is an alternating component of admittance.

However, the general electrical measurement method has a problem that the spread of the current spreads down the skin stratum corneum as the distance between the electrodes is far, which leads to an error in the measured value of moisture in the skin stratum corneum. As a result, accurate data can only be obtained by using microstructure of the electrode used.

Therefore, there is a problem that it is expensive to manufacture the electrode of the fine structure. In addition, by using the electrode of the microstructure there is a problem that the measurement of the measurement data due to noise occurs during operation of the device can not measure the accurate skin moisture.

Therefore, there is a need for a method capable of minimizing the influence of noise generated during operation and measuring the moisture content of the skin without using the microelectrode.

Accordingly, an object of the present invention is to provide a portable skin moisture automatic measuring device and method for automatically measuring the skin moisture by measuring the impedance of the skin.

In addition, another problem to be solved by the present invention is to measure the impedance of the skin to automatically measure the moisture level of the skin to improve the accuracy of the device and a portable skin moisture automatic measurement device and method that can reduce the manufacturing cost To provide.

In addition, another problem to be solved by the present invention is a portable skin moisture measuring device that can automatically measure the moisture level of the skin by measuring the impedance of the skin, and improve the accuracy by minimizing the noise generated when operating the device And a method thereof.

이고, 상기 a, b, 및 c(2000<a<25000, -30<b<0, 25<c<30 인 실수)는 휴대용 수분 자동 측정 장치의 기기의 오차를 보정하기 위한 상수이고, n(10≤n≤1000)명의 피검자를 대상으로 레퍼런스 장치와 상기 휴대용 피부 수분 자동 측정장치로 동일 위치를 적어도 한번씩 각각 측정하여, 각각의 측정된 피부수분도값, 측정된 상기 임피던스값, 및 측정된 상기 전압의 기울기값들을 기초로 다중회귀분석에 의하여 구하고 상기 피부 수분 자동 측정 장치에 미리 프로그램되어진다.An apparatus for automatically measuring skin moisture according to an embodiment of the present invention includes a plurality of electrodes and outputs a current to the skin in contact with the skin, and an array electrode unit for measuring voltages generated based on the current output to the skin. ; The impedance is calculated by the voltages measured by the array electrode unit and the current output to the skin, and the skin moisture content is calculated by using the slope and the calculated impedance of the measured voltages. Control device; And an image display device for displaying the skin moisture level output from the control device. The skin moisture formula is

A, b, and c (real number 2000 <a <25000, -30 <b <0, 25 <c <30) are constants for correcting the error of the apparatus of the portable moisture measuring apparatus. 10≤n≤1000) subjects were measured at least once with the reference device and the portable skin moisture measuring device at least once, so that each measured skin moisture value, the measured impedance value, and the measured voltage were measured. It is obtained by multiple regression analysis on the basis of the slope values of and is pre-programmed in the automatic skin moisture measuring apparatus.

The control device may include a touch sensing unit configured to determine whether the array electrode unit contacts the skin and output a skin contact signal; An arithmetic and control unit outputting a control signal for controlling to output a predetermined current to the array electrode unit in response to the skin contact signal; And outputs a current to the skin through the array electrode unit in response to a control signal output from the operation control unit, calculates an impedance based on the current output to the skin and the voltages measured from the array electrode unit, and measures the measured voltage. And a measurement unit for calculating the slope of the field, and the calculation control unit calculates the moisture level of the skin by the skin moisture level calculation formula using the impedance calculated by the measurement unit and the slope of the measured voltages.

The array electrode unit includes a first electrode unit for sensing the skin contact; And a second electrode unit configured to receive a current output from the operation control unit, output a predetermined current to the contacted skin, and measure voltages generated by the predetermined current output to the skin.

The first electrode part includes at least two electrodes, and the second electrode part is positioned between two electrodes of the first electrode part.

The second electrode part includes a plurality of electrodes, and one of the plurality of electrodes is an electrode for outputting a predetermined current to the contacted skin.

Each of the plurality of electrodes is electrically connected to the measurement unit by MUX, and selectively connected based on a selection signal. At least one of the plurality of electrodes is an electrode for measuring voltages generated based on a predetermined current output to the skin. One of the plurality of electrodes is an electrode having a reference potential (ground potential). Each of the plurality of electrodes is positioned at regular intervals from each other. Each of the plurality of electrodes consists of at least one electrode pair. Each of the at least one electrode pair is internally shorted.

The apparatus for automatically measuring skin moisture further includes a memory device for storing the moisture level of the skin calculated and output by the controller. The portable skin moisture automatic measuring device further includes an interface device for outputting the measured moisture content to the external device when connected to an external device. The portable skin moisture measuring apparatus further includes a voice display device that outputs an alarm sound when the moisture level calculation of the skin is completed. The portable skin moisture measuring apparatus further includes a power supply unit for turning on / off an operation of the portable skin moisture measuring apparatus.

An apparatus for automatically measuring skin moisture according to an embodiment of the present invention includes a plurality of electrodes and outputs a current to the skin in contact with the skin, and an array electrode for measuring voltages generated based on the current output to the skin. part; The impedance is calculated by the voltages measured by the array electrode unit and the current output to the skin, and the skin moisture content is calculated by using the slope and the calculated impedance of the measured voltages. Control device; An image display device for displaying the moisture level of the skin output from the control device; A memory device for storing the moisture content of the skin calculated and output by the control device; An interface device for outputting the measured moisture content to the external device when connected to an external device; A voice display device for outputting an alarm sound when the moisture content calculation of the skin is completed; And a power supply unit for turning on / off the operation of the portable skin moisture automatic measuring device.

이고, 상기 a, b, 및 c(2000<a<25000, -30<b<0, 25<c<30 인 실수)는 휴대용 수분 자동 측정 장치의 기기의 오차를 보정하기 위한 상수이고, n(10≤n≤1000)명의 피검자를 대상으로 레퍼런스 장치와 상기 휴대용 피부 수분 자동 측정장치로 동일 위치를 적어도 한번씩 각각 측정하여, 각각의 측정된 피부 수분도값, 측정된 상기 임피던스값, 및 측정된 상기 전압의 기울기값들을 기초로 다중회귀분석에 의하여 구하고 상기 피부 수분 자동 측정 장치에 미리 프로그램되어진다.The skin moisture formula is

A, b, and c (real number 2000 <a <25000, -30 <b <0, 25 <c <30) are constants for correcting the error of the apparatus of the portable moisture measuring apparatus. 10≤n≤1000) subjects were measured at least once with the reference device and the portable skin moisture measuring device at least once, so that each measured skin moisture value, the measured impedance value, and the measured voltage were measured. It is obtained by multiple regression analysis on the basis of the slope values of and is pre-programmed in the automatic skin moisture measuring apparatus.

The control device may include a touch sensing unit configured to determine whether the array electrode unit contacts the skin and output a skin contact signal; An arithmetic and control unit outputting a control signal for controlling to output a predetermined current to the array electrode unit in response to the skin contact signal; And

Outputs a current to the skin through the array electrode unit in response to a control signal output from the operation control unit, calculates an impedance based on the current output to the skin and the voltages measured from the array electrode unit, And a measurement unit for calculating a slope, wherein the calculation control unit calculates the moisture level of the skin by the skin moisture level calculation formula using the impedance calculated by the measurement unit and the slope of the measured voltages.

The array electrode unit includes a first electrode unit for sensing the skin contact; And a second electrode unit configured to receive a current output from the operation control unit, output a predetermined current to the contacted skin, and measure voltages generated by the predetermined current output to the skin.

Portable skin moisture measurement method according to an embodiment of the present invention comprises the steps of detecting the skin contact; Outputting a current to the skin and measuring voltages based on the output current; Calculating an impedance based on the measured voltages and calculating a slope of the measured voltages; And calculating the moisture content of the skin based on the calculated impedance and the slope of the measured voltages.

The automatic skin moisture measurement method may further include outputting the calculated moisture content of the skin to an image display device.

The automatic skin moisture measurement method may further include outputting a voice alarm signal for calculating the moisture level of the skin.

The method for automatically measuring skin moisture further includes transmitting the moisture content of the skin calculated when the external device is connected to the external device.

Portable skin moisture automatic measuring device and method according to the present invention has the effect of automatically measuring the skin moisture by measuring the impedance of the skin.

In addition, the portable skin moisture measuring apparatus according to the present invention can measure the impedance of the skin to automatically measure the moisture level of the skin to improve the accuracy of the device and has the effect of reducing the manufacturing cost.

In addition, the portable skin moisture measuring apparatus according to the present invention, and the method can measure the skin moisture by automatically measuring the impedance of the skin, the effect of improving the accuracy by minimizing the noise generated when operating the device There is.

BRIEF DESCRIPTION OF THE DRAWINGS In order to better understand the drawings cited in the detailed description of the invention, a brief description of each drawing is provided.
1 is a schematic block diagram of a portable moisture measuring device according to an embodiment of the present invention.
FIG. 2 is a diagram illustrating an embodiment of the array electrode unit illustrated in FIG. 1.
3 is a diagram illustrating another embodiment of the array electrode unit illustrated in FIG. 1.
4 is a view for explaining a method for detecting skin contact.
5 is a flow chart for explaining the operation of the automatic skin moisture measuring apparatus according to an embodiment of the present invention.
6A and 6B are models of a portable skin moisture automatic measuring device according to an embodiment of the present invention.

In order to fully understand the present invention, the operational advantages of the present invention, and the objects achieved by the practice of the present invention, reference should be made to the accompanying drawings which illustrate preferred embodiments of the present invention and the contents described in the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Like reference numerals in the drawings denote like elements.

1 is a schematic block diagram of a portable moisture measuring device according to an embodiment of the present invention. Referring to FIG. 1, the portable skin moisture measuring apparatus 10 includes an array electrode unit 100, a control device 200, and an image display device 300.

The array electrode unit 100 includes a plurality of electrodes and outputs a predetermined current to the skin in contact with the skin, and measures voltages generated based on the current output to the skin.

The control device 200 calculates an impedance based on the voltages measured by the array electrode unit 100 and the current output to the skin, and uses Equation 1 by using the measured slope and the calculated impedance. The skin moisture level is calculated and output according to the formula.

The a, b, and c (real number 2000 <a <25000, -30 <b <0, 25 <c <30) are constants for correcting the error of the apparatus of the portable moisture measuring apparatus, and n (10≤ The same position is measured at least once by a reference device (not shown) and the portable skin moisture measuring device 10 for each n ≦ 1000 subjects, and the measured skin moisture content value, the measured impedance value, And obtained by multi-regression analysis based on the measured slope values of the voltage and programmed in advance in the apparatus for automatically measuring skin moisture. In the embodiment of the present invention, the n subjects are preferably 10, but are not limited thereto. The reference device (not shown) may use an existing commercially available moisture measuring device.

The control device 200 includes a touch sensing unit 210, an operation control unit 220, and a measuring unit 230. The touch detector 210 determines whether the array electrode unit 100 is in contact with the skin and outputs a skin contact signal to the operation controller 220.

That is, when the portable skin moisture measuring apparatus 10 contacts the skin to measure the moisture level of the skin, the contact detecting unit 210 determines whether all of the electrodes of the array electrode unit 100 are correctly in contact with the skin. Sensing and outputting the skin contact signal to the operation control unit 220.

The operation control unit 220 outputs a control signal for controlling to output a predetermined current to the array electrode unit 100 in response to the skin contact signal output from the contact sensing unit 210.

The measurement unit 230 outputs a current to the array electrode unit 100 in response to a control signal output from the operation control unit 220, the voltage generated by the current output to the skin from the array electrode unit 100 The impedance is calculated based on the above-described values, and the slope of the generated voltages is calculated and output to the calculation controller 220.

 The operation control unit 220 receives the slope of the impedance and the voltage output from the measurement unit 230, and based on the slope of the received impedance and the voltage of the skin according to the formula 1 skin moisture calculation formula Calculate the moisture content of and output it.

The image display device 300 receives information on the moisture level of the skin calculated and output from the operation control unit 220 and displays it as an image signal. The image display device 300 may be implemented as a PDP, OLED, or LCD device.

2 and 3 are views illustrating an embodiment of the array electrode unit illustrated in FIG. 1, and FIG. 4 is a diagram for describing a method of detecting skin contact. 2 and 3, the array electrode part 100 includes a first electrode part 110 and a second electrode part 120.

Here, the first electrode part is composed of two electrodes (electrodes 1 to 2), and the second electrode part 120 will be described with an example composed of four electrodes (electrodes 3 to 6).

The first electrode unit 110 is an electrode for detecting whether all the electrodes 1 to 7 of the array electrode unit 100 are in contact with the skin. 2 to 4, the first electrode unit 110 is positioned outside the second electrode unit 120, and two electrodes 1 to 2 of the first electrode unit 110 are provided. ) Touches all of the skin, the contact detecting unit 210 determines that all the electrodes (electrodes 1 to 6) of the array electrode unit 100 is completely in contact with the skin, and the skin contact signal is the operation control unit Output to 220.

The second electrode unit 120 receives a current output from the measuring unit 230 and outputs a predetermined predetermined current stored in advance into the contacted skin, and a voltage generated based on the current output to the skin. Are output to the measurement unit 230. The second electrode part 120 is positioned between two electrodes (the first to second electrodes) of the first electrode part 110. The second electrode unit 120 includes a plurality of electrodes (electrodes 3 to 6), and any one electrode (electrode 3) of the plurality of electrodes (electrodes 3 to 6) is defined as contacted skin. Output the current.

Each of the plurality of electrodes (electrodes 3 to 6) is electrically connected by the measuring unit 230 and the MUX 231, and selects any one based on a selection signal output from the operation control unit 220. Measure the voltage. Any one of the plurality of electrodes provided in the second electrode unit 120 is an electrode having a reference potential (eg, ground potential, electrode 6) for measuring a voltage.

That is, any one of a plurality of electrodes selected by the MUX 231 (electrodes 3 to 6) selected by the MUX 231 has a reference potential while the measurement unit 230 outputs a predetermined pre-programmed current to the skin. The voltage is measured based on the electrode (electrode 6) and is output to the measuring unit 230.

As a result, the measurement unit 230 calculates an impedance based on the current output to the skin and the voltage measured through the plurality of electrodes, and at the same time, the voltage between the electrode 3 and the electrode 6, the electrode 4 and the electrode 6 Based on the voltage between and the voltage between the 5 and 6 electrodes, the slope of the voltage that changes according to the thickness of the stratum corneum of the skin is calculated and output.

As illustrated in FIG. 3, the plurality of electrodes (electrodes 3 to 6) may be implemented as an electrode pair which is disposed at regular intervals from each other and is shorted internally. This can measure accurate voltages by increasing the degree of contact between the plurality of electrodes (electrodes No. 3-6) and the skin.

Referring back to FIG. 1, the portable skin moisture automatic measuring device 10 may further include a memory device 400, an interface device 500, a voice display device 600, and a power supply 700.

The memory device 400 receives and stores the skin moisture level calculated and output by the control device 200.

When the interface device 400 comes into contact with an external device (eg, PC, PMP, etc.), the interface device 400 interfaces information about the skin moisture level stored in the memory device 400 with an external device and outputs the interface information.

The voice display device 600 outputs an alarm sound when the control device 200 calculates the moisture level of the skin.

The power supply device 700 performs an on / off operation of the portable skin moisture automatic measuring device 10. The power supply apparatus 700 may be implemented to automatically turn off the power when the portable skin moisture measuring apparatus 10 is not used for a long time. Although not shown, the power supply device 700 may further include a power supply device (eg, a battery, etc.) for supplying power required for the operation of the automatic water measurement device 10.

Figure 5 is a flow chart for explaining the operation of the automatic skin moisture measuring apparatus according to an embodiment of the present invention. 1 and 5, the portable skin moisture automatic measuring device 10 selects a measurement target and is initialized when power is applied to enter the measurement standby mode (S510 to S513).

The portable skin moisture automatic measuring device 110 determines whether to connect with an external device (eg, a PC) (S514) and transmits the stored data to the external device when the external device (eg, a PC) is connected (S515). When the external device is not connected, it is determined whether the portable skin moisture automatic measuring device 10 is in contact with the skin (S516).

When the portable skin moisture measuring device 10 is not in contact with the skin within a predetermined waiting time and enters the standby mode (S523), when the portable skin moisture measuring device 10 is in contact with the skin within a predetermined waiting time The current is output to the contacted skin (S517). The waiting time may be changed by the user's setting.

The portable skin moisture automatic measuring apparatus 10 calculates impedance by measuring voltages generated corresponding to the current output to the skin, and calculates and outputs a slope of the measured voltages (S518 and S519).

The portable skin moisture measuring apparatus 10 calculates the skin moisture level based on the calculated impedance and the slope of the voltage (S520).

The portable skin moisture automatic measuring device 10 generates an alarm signal by outputting a calculation completion signal to the voice display device 600 when the calculation of the skin moisture level is completed (S521) and calculating the image display device 300. The information is output to the extracted skin moisture level to display information on the skin moisture level as an image signal, and the calculated skin moisture level is stored in the memory device 400 (S522). When the storage of the calculated skin moisture level in the memory 400 is completed, the process enters the standby mode (S523). If there is no measurement command for a predetermined time, the skin moisture measurement is terminated (S524).

6A and 6B are models of a portable skin moisture automatic measuring device according to an embodiment of the present invention. 6A and 6B, the portable skin moisture automatic measuring device 10 measures the voltage of the skin by contacting the skin through the array electrode unit 100, and the control device 200 provided therein is The moisture content of the skin is calculated and calculated and displayed on the image display device 300 provided at one side (eg, the upper end) of the housing, and at the same time, information about the moisture level of the skin is stored in the memory device 400 provided therein.

The portable skin moisture automatic measuring device 10 is connected to an external device (eg, a PC) through an external device connection device (eg, a USB or a data cable) using an interface device provided on one side (eg, a side) of the housing. ) Information about the skin moisture level stored in the internal memory device 400.

The portable skin moisture automatic measuring device 10 is provided at one side (eg, the upper end) of the housing to perform an on / off operation of the device.

As described above, it is possible to automatically measure the moisture content of the skin without using the microelectrode, which is expensive to manufacture, and to reduce the influence of noise generated during operation of the device, thereby obtaining accurate measurement data. .

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

100: array electrode 200: controller
210: contact detection unit 220: operation control unit
230: measuring unit 300: image display device
400: memory device 500: interface device
600: voice display device 700: power supply

Claims (24)

An array electrode unit including a plurality of electrodes and outputting a current to the skin in contact with the skin and measuring voltages generated based on the current output to the skin;
The impedance is calculated by the voltages measured by the array electrode unit and the current output to the skin, and the skin moisture content is calculated by using the slope and the calculated impedance of the measured voltages. Control device; And
Portable skin moisture measuring device comprising an image display device for displaying the skin moisture level output from the control device. The method of claim 1,
The skin moisture formula is,

ego,
The a, b, and c (real number 2000 <a <25000, -30 <b <0, 25 <c <30),
Constant for correcting the error of the device of the portable automatic water measurement device, the same position is measured at least once by the reference device and the portable automatic skin moisture measurement device for n (10≤n≤1000) subjects, respectively. A portable skin moisture measuring device, which is obtained by multi-regression analysis based on the measured skin moisture content value, the measured impedance value, and the measured slope value of the voltage, and is pre-programmed into the automatic skin moisture measuring device. The method of claim 2,
The control device includes:
A touch sensing unit for determining whether the array electrode unit is in contact with the skin and outputting a skin contact signal;
An arithmetic and control unit outputting a control signal for controlling to output a predetermined current to the array electrode unit in response to the skin contact signal; And
Outputs a current to the skin through the array electrode unit in response to a control signal output from the operation control unit, calculates an impedance based on the current output to the skin and the voltages measured from the array electrode unit, It has a measuring unit for calculating the slope,
The operation control unit,
Portable skin moisture measuring apparatus for calculating the moisture content of the skin by the skin moisture content calculation formula using the impedance calculated by the measuring unit, and the slope of the measured voltages. The method of claim 3,
The array electrode unit,
A first electrode unit for sensing the skin contact;
A portable skin moisture measuring apparatus including a second electrode unit for receiving a current output from the operation control unit to output a predetermined current to the contacted skin, and to measure voltages generated by the predetermined current output to the skin. . The method of claim 4, wherein
The first electrode unit is provided with at least two electrodes, the second electrode unit is a portable skin moisture measuring device located between the two electrodes of the first electrode unit. The method of claim 5,
The second electrode unit is provided with a plurality of electrodes, any one of the plurality of electrodes is a portable skin moisture automatic measuring device is an electrode for outputting a predetermined current to the contacted skin. The method of claim 6,
And each of the plurality of electrodes is electrically connected to the measurement unit by MUX, and is selectively connected based on a selection signal. The method of claim 6,
And at least one of the plurality of electrodes is an electrode for measuring voltages generated based on a predetermined current output to the skin. The method of claim 6,
Any one of the plurality of electrodes is a portable skin moisture automatic measuring device is an electrode having a reference potential (ground potential). The method of claim 6,
Each of the plurality of electrodes is a portable skin moisture automatic measuring device which is positioned at regular intervals from each other. 11. The method according to any one of claims 6 to 10,
Each of the plurality of electrodes is a portable skin moisture measuring device consisting of at least one electrode pair. The method of claim 11,
And each of the at least one electrode pair is internally shorted. The method of claim 1,
The skin moisture automatic measuring device,
And a memory device for storing the moisture level of the skin calculated and output by the control device. The method of claim 1,
The portable skin moisture automatic measurement device,
The portable skin moisture measurement apparatus further comprises an interface device for outputting the measured moisture content to the external device when connected to an external device. The method of claim 1,
The portable skin moisture automatic measurement device,
And a voice display device for outputting an alarm sound when the moisture level calculation of the skin is completed. The method of claim 1,
The portable skin moisture automatic measurement device,
Portable skin moisture measuring apparatus further comprises a power supply for turning on / off (ON / OFF) operation of the portable skin moisture measuring apparatus. An array electrode unit including a plurality of electrodes and outputting a current to the skin in contact with the skin and measuring voltages generated based on the current output to the skin; And
The impedance is calculated by the voltages measured by the array electrode unit and the current output to the skin, and the skin moisture content is calculated by using the slope and the calculated impedance of the measured voltages. Control device; And
An image display device for displaying the moisture level of the skin output from the control device;
A memory device for storing the moisture content of the skin calculated and output by the control device;
An interface device for outputting the measured moisture content to the external device when connected to an external device;
A voice display device for outputting an alarm sound when the moisture content calculation of the skin is completed; And
Portable skin moisture automatic measurement device including a power supply for turning on / off (ON / OFF) operation of the portable skin moisture automatic measurement device. The method of claim 17,
The skin moisture formula is,

ego,
The a, b, and c (real number 2000 <a <25000, -30 <b <0, 25 <c <30),
Constant for correcting the error of the device of the portable automatic water measurement device, the same position is measured at least once by the reference device and the portable automatic skin moisture measurement device for n (10≤n≤1000) subjects, respectively. A portable skin moisture measuring device, which is obtained by multi-regression analysis based on the measured skin moisture content value, the measured impedance value, and the measured slope value of the voltage, and is pre-programmed into the automatic skin moisture measuring device. The method of claim 17,
The control device includes:
A touch sensing unit for determining whether the array electrode unit is in contact with the skin and outputting a skin contact signal;
An arithmetic and control unit outputting a control signal for controlling to output a predetermined current to the array electrode unit in response to the skin contact signal; And
Outputs a current to the skin through the array electrode unit in response to a control signal output from the operation control unit, calculates an impedance based on the current output to the skin and the voltages measured from the array electrode unit, It has a measuring unit for calculating the slope,
The operation control unit,
Portable skin moisture measuring apparatus for calculating the moisture content of the skin by the skin moisture content calculation formula using the impedance calculated by the measuring unit, and the slope of the measured voltages. The method of claim 19,
The array electrode unit,
A first electrode unit for sensing the skin contact;
A portable skin moisture measuring apparatus including a second electrode unit for receiving a current output from the operation control unit to output a predetermined current to the contacted skin, and to measure voltages generated by the predetermined current output to the skin. . Detecting skin contact;
Outputting a current to the skin and measuring voltages based on the output current;
Calculating an impedance based on the measured voltages and calculating a slope of the measured voltages; And
And calculating the moisture content of the skin based on the calculated impedance and the slope of the measured voltages. The method of claim 21,
The skin moisture automatic measurement method,
And automatically outputting the calculated moisture content of the skin to an image display device. The method of claim 21,
The skin moisture automatic measurement method,
Portable skin moisture automatic measurement method further comprising the step of outputting a voice alarm signal to the calculation of the moisture level of the skin. The method of claim 21,
The skin moisture automatic measurement method,
Portable skin moisture measurement method further comprises the step of transmitting the calculated moisture content of the skin to the external device when the external device is connected.

Images