JP7645939B2 - Skin analysis system, skin analysis device, and skin analysis method - Google Patents

Description

The present invention relates to a skin analysis system, a skin analysis device, and a skin analysis method , and in particular to a technique that is effective for non-contact gas measurement on the skin surface.

Background art in this technical field includes, for example, JP 2002-263072 (Patent Document 1), JP 2010-172543 (Patent Document 2), and JP 2010-169658 (Patent Document 3).

Patent Document 1 states that the objective of the invention is to "provide a moisture evaporation measurement device that is capable of measuring with sufficient accuracy, and is small, lightweight, inexpensive, and easy to handle." It also states that the solution is to "place a circuit board inside a frame that comes into contact with the skin surface, and place only one capacitive polymer thin film humidity sensor on the circuit board as a humidity detection element. The drive circuit for the humidity detection element is also placed on the circuit board. The moisture evaporation amount is calculated from the circuit output extracted through the handle shaft. Because only one humidity detection element is used, the number of parts is reduced compared to when two are used, and the costs of assembly, adjustment, and maintenance are lower."

Patent Document 2 also states that the objective of the present invention is to "provide an apparatus that estimates transepidermal water loss simply and accurately and evaluates the skin barrier function based on the estimated amount of transepidermal water loss." It also states that the solution to this problem is to "include a main body, application electrodes capable of applying multiple AC voltages and installed on the main body, detection electrodes 13 installed on the main body for detecting either susceptance (B), admittance (Y), or conductance (G), a display unit installed on the main body, and a calculation unit built into the main body for calculating a characteristic value (P) that can be used as an estimate of the transepidermal water loss based on either the detected susceptance (B), admittance (Y), or conductance (G), and the transepidermal water loss is estimated based on the calculated characteristic value (P) and the skin barrier function is evaluated based on the estimated amount of transepidermal water loss."

Patent Document 3 also describes the problem as "efficiently analyzing gas supplied from a gas supplying portion," and describes the solution as "including a capture film 3 (e.g., a porous polymer, etc.) that captures gas, and a capture section (a member composed of a capture film and a collection container) in which the capture film can be positioned so that the gas captured by the capture film (e.g., skin gas generated from a human body) interacts with the terahertz waves or infrared light generated from the generation section. The capture section includes a structure (collection container) that can come into contact with the portion that supplies the gas (e.g., the human body, such as an arm or hand). The structure is provided to maintain the capture film and the portion 1 in a non-contact state."

JP 2002-263072 A JP 2010-172543 A JP 2010-169658 A

The skin of the human body not only regulates the internal environment and temperature through cutaneous breathing and sweating, but also protects the internal tissues of the body from external stimuli such as foreign bodies, bacteria, and microorganisms.

For this reason, it is important to obtain information on the amount of moisture inside the skin and the amount of moisture evaporated from the skin, i.e., the amount of transepidermal water loss, from the perspective of maintaining health, such as preventing heatstroke and dry skin caused by atopic dermatitis, as well as from practical perspectives, such as evaluating cosmetics and pharmaceuticals and beauty. In particular, transepidermal water loss is of great interest as an index for evaluating the skin's barrier function, which protects the body from external stimuli and prevents moisture from evaporating outside the body.

In healthcare, not only is moisture evaporated from the skin measured, but gases such as skin gas are also measured. Skin gas can be used to detect certain diseases. For example, skin gas that contains a lot of acetone is said to be associated with diabetes, and skin gas that contains a lot of ammonia is said to be associated with chronic liver disease.

In measuring transepidermal water loss, a technique is known (e.g., Patent Document 1) that uses a humidity sensor to measure the amount of water loss that evaporates from the skin surface. This technique requires a mechanism to stabilize the humidity sensor that measures the amount of water loss that evaporates from the skin surface. This makes the measuring device expensive and bulky. In addition, since it is a contact type in which part of the measuring device is brought into contact with the target, i.e., the skin, there is a risk that the patient's skin surface may be affected or damaged during measurement. Considering the impact on the patient's skin, the measurement points are limited.

On the other hand, there is a technology (e.g., Patent Document 2) that evaluates the barrier function of the skin in a small size and at low cost by measuring the electrical properties of the skin. As with Patent Document 1, it is necessary to bring part of the measuring device into contact with the skin, which is the part to be measured, in order to measure the electrical properties of the object.

Furthermore, known techniques for measuring skin gas include a technique for capturing skin gas and measuring the captured skin gas using electromagnetic waves (e.g., Patent Document 3). In this technique, the measuring device must be configured with a light source that generates infrared light or the like and a detector to capture and measure the skin gas. This poses the problem that the device configuration becomes complex and large-scale.

The technology in Patent Document 3 also involves measuring by bringing part of the measuring device into contact with the skin of the target object, which limits the measurement location, just like Patent Documents 1 and 2.

The objective of the present invention is to provide a technology that can measure gas from an object with a simple configuration without affecting the user's skin, etc.

The above and other objects and novel features of the present invention will become apparent from the description of this specification and the accompanying drawings.

A brief summary of the representative inventions disclosed in this application is as follows:

That is, a typical skin analysis system includes a non-contact gas measuring device that uses electromagnetic waves to measure a target gas emitted from the skin of a subject, an analysis unit that analyzes the target gas from the measurement values measured by the non-contact gas measuring device, a system control unit that controls the operation of the non-contact gas measuring device and the analysis unit, and a display unit. The non-contact gas measuring device is an electronic device that oscillates electromagnetic waves in a negative resistance region, irradiates the electromagnetic waves to the skin of the subject, and outputs a voltage or current value that changes depending on the intensity of the electromagnetic waves reflected from the skin of the subject to the analysis unit as a measurement value, and the display unit displays information regarding the condition of the skin as a result based on the analysis by the analysis unit.

A typical skin analysis device includes a communication unit that connects to a communication network, an output unit that outputs information, an imaging unit that acquires images, a non-contact gas measuring device that uses electromagnetic waves to measure a target gas emitted from the skin of a subject, an analysis unit that analyzes the target gas from the measurement values measured by the non-contact gas measuring device, a system control unit that controls the operation of the skin analysis device, and a display unit. The non-contact gas measuring device irradiates the electromagnetic waves to the skin of the subject and outputs a voltage or current value that changes depending on the intensity of the electromagnetic waves reflected from the skin of the subject to the analysis unit as a measurement value. The display unit displays information regarding the condition of the skin as a result based on the analysis by the analysis unit. The communication unit transmits the measurement values of the electromagnetic waves measured by the non-contact gas measuring device to an analysis device connected to the communication network and receives the analysis results analyzed by the analysis device .

The effects achieved by the representative inventions disclosed in this application can be briefly explained as follows:

(1) It can improve convenience for users.

(2) Non-contact gas measurement devices and non-contact gas measurement systems can be made smaller.

1 is an explanatory diagram showing an example of the configuration of a non-contact gas measuring device according to a first embodiment; 2 is an explanatory diagram showing an example of characteristics of a receiver-oscillator included in the non-contact gas measuring device of FIG. 1 . 4 is a flowchart showing an example of a gas measurement operation performed by the non-contact gas measuring device of FIG. 1 . 2 is an explanatory diagram showing an example of the configuration of a non-contact gas measurement system using the non-contact gas measurement device of FIG. 1. FIG. 5 is a schematic perspective view showing an example of the non-contact gas measurement system of FIG. 4. FIG. 6 is an explanatory diagram showing an example of using the non-contact gas measurement system of FIG. 5 . 5 is an explanatory diagram showing an example of the configuration of a receiving/oscillating section and an information correcting section included in the non-contact gas measuring system of FIG. 4 . 5 is an explanatory diagram showing another example of the configuration of the receiving/oscillating unit and the information correcting unit included in the non-contact gas measuring system of FIG. 4 . FIG. FIG. 9 is an explanatory diagram following FIG. 8 . 5 is an explanatory diagram showing an example of the configuration of a control information management table referred to by a system control unit of the non-contact gas measuring system of FIG. 4 . 5 is an explanatory diagram showing an example of a measurement result table stored in a memory of the non-contact gas measurement system of FIG. 4. 5 is a flowchart showing an example of a measurement process of a measurement target gas by the non-contact gas measurement system of FIG. 4 . 11 is an explanatory diagram showing an example of the configuration of a receiving oscillator and an information corrector according to a second embodiment; FIG. FIG. 11 is an explanatory diagram showing an example of the configuration of a mobile terminal according to embodiment 3. FIG. 15 is an explanatory diagram showing an example of an overview of the mobile terminal of FIG. 14 . 16 is an explanatory diagram showing an example of a display by an input/output unit of the mobile terminal of FIG. 15 . 15 is a flowchart showing an example of the operation of gas measurement by the mobile terminal of FIG. 14 .

In all drawings used to explain the embodiments, the same components are generally given the same reference numerals, and repeated explanations will be omitted.

(Embodiment 1)
The embodiment will be described in detail below.

<Example of non-contact gas measuring device configuration>
FIG. 1 is an explanatory diagram showing an example of the configuration of a non-contact gas measuring device 100 according to the first embodiment.

The non-contact gas measuring device 100 uses electromagnetic waves to measure the measurement target gas 601 emitted from the target object 600. As shown in FIG. 1, the non-contact gas measuring device 100 has a receiving/oscillating unit 101 and a control unit 110. The receiving/oscillating unit 101 is configured to independently oscillate and receive electromagnetic waves, and emits and detects electromagnetic waves.

The receiving/oscillating unit 101 has a transceiver 102 and a lens 103. The transceiver 102 oscillates and receives electromagnetic waves. The lens 103 collimates the electromagnetic waves oscillated by the transceiver 102, irradiates the object 600 with the parallel light, and collects the reflected waves from the object 600.

The electromagnetic waves generated by the receiver-transmitter 102 are irradiated perpendicularly to the object 600, so that the reflected waves pass through the measurement target gas 601 and return to the receiver-transmitter 102. Here, the object 600 is the user's skin, for example. The control unit 110 controls the receiver-oscillator 101.

The electromagnetic waves oscillated by the receiving/oscillating unit 101 have a frequency that is easily absorbed by gas. For example, if the object 600 is skin and the measurement target gas 601 is water vapor that evaporates from the skin, a frequency of about 0.56 THz or about 0.75 THz is suitable.

The receiver-oscillator 102 is, for example, an electronic device that oscillates electromagnetic waves in the negative resistance region, such as a resonant tunneling diode. For convenience, FIG. 1 shows a resonant tunneling diode, but the receiver-oscillator is not limited to this.

For example, it may be a device that oscillates electromagnetic waves, such as a laser. Examples of oscillators that oscillate at frequencies of about 0.56 THz or 0.75 THz include quantum cascade lasers and resonant tunneling diodes.

<Characteristics of receiver/transmitter>
FIG. 2 is an explanatory diagram showing an example of the characteristics of the transmitter/receiver 102 of the non-contact gas measuring device 100 of FIG.

Figure 2 shows the relationship between the strength of the reflected wave from the object 600 and the current flowing between the terminals of the transmitter-receiver 102, and is an example of a phenomenon that affects the oscillation characteristics of the transmitter-receiver 102 when an electromagnetic wave oscillated from the transmitter-receiver 102 returns to the transmitter-receiver 102 as a reflected wave.

For example, if a resonant tunneling diode is used as the transmitter/receiver 102, electromagnetic waves are oscillated in the negative resistance region by applying a specific voltage between the terminals of the resonant tunneling diode.

Non-patent literature Masahiro Asada and Safumi Suzuki 2015 Jpn. J. Appl. Phys. 54 070309 describes that when the reflectivity of a reflecting object differs, the current flowing between the terminals of an oscillator changes.

This occurs when a virtual admittance is added to the oscillation circuit. Similarly, in the case of semiconductor lasers, reflected waves affect the oscillation characteristics, but this occurs when the oscillation wave and the reflected wave interfere with each other inside the resonator. Until now, these phenomena have been treated as noise.

The inventors have realized that this phenomenon can be applied to non-contact gas measurement by regarding what is shown as the reflectance of a reflective object in the above-mentioned non-patent document as attenuation due to absorption of electromagnetic waves in the gas to be measured.

In other words, the transmitter/receiver 102 oscillates an electromagnetic wave, and a difference occurs in the current flowing through the transmitter/receiver 102 depending on the strength of the reflected wave that is reflected from the object 600 and returns to the transmitter/receiver 102. Since the strength of the reflected wave changes depending on the amount of gas 601 to be measured in this electromagnetic wave path, it is possible to measure the gas using the difference in the current or voltage applied to the transmitter/receiver 102.

For example, in FIG. 2, when the current flowing between the terminals of the resonant tunneling diode is small, the strength of the reflected wave is weak, and as a result, it can be seen that the absorption of the electromagnetic wave by the measurement target gas 601 is strong. In other words, it can be seen that the amount of measurement target gas 601 is large.

In this way, by detecting the current or voltage change between the terminals of the transmitter/receiver 102 and calculating the amount of electromagnetic waves absorbed by the gas 601 to be measured, it is possible to measure the gas 601 to be measured from the correlation between the amount and absorption by the gas.

The graph shown in Figure 2 is just an example, and the data structure is not limited to this. Any information, such as a table structure, may be used as long as it shows the relationship between the measured current value and the gas being measured.

<Example of gas meter operation>
FIG. 3 is a flowchart showing an example of the operation of gas measurement by the non-contact gas measuring device 100 of FIG.

First, the control unit 110 controls the receiving/oscillating unit 101 to irradiate electromagnetic waves of a preset frequency onto the object 600 to be measured (step S101). In the process of step S101, the non-contact gas measuring device 100 only needs to irradiate electromagnetic waves toward the object 600, so there is no need to bring the non-contact gas measuring device 100 into close contact with the object 600, such as the skin, and gas measurement is performed with a distance between the non-contact gas measuring device 100 and the object 600, as shown in FIG. 1.

The electromagnetic waves irradiated perpendicularly to the object 600 pass through the measurement target gas 601 and are irradiated to the object 600, and the reflected waves are focused by the lens 103 and return to the receiver-transmitter 102. Next, the control unit 110 acquires a current or voltage value according to the intensity of the reflected waves received by the receiver-oscillator 101 (step S102).

As a result, gas can be measured without the non-contact gas measuring device 100 being in close contact with the object 600 as described above, which reduces the impact on the patient's skin surface during measurement. In addition, since there is no need to consider the impact on the skin, there are no limitations on the measurement location, and accurate measurement results can be easily obtained.

When the gas to be measured 601 is uniquely determined, it is possible to replace the intensity of the reflected wave in FIG. 2 with the concentration of the gas to be measured 601 by measuring the value quantitatively in advance. In this case, the concentration of the gas to be measured 601 can be calculated using the current value or voltage value measured in the process of step S102. It is also possible to convert the change in the gas to be measured 601 by comparing it with the results of the current or voltage measured in the past.

<Example of non-contact gas measurement system configuration>
FIG. 4 is an explanatory diagram showing an example of the configuration of a non-contact gas measuring system 500 using the non-contact gas measuring device 100 of FIG.

As shown in FIG. 4, the non-contact gas measurement system 500 includes a non-contact gas measurement device 100, an information correction unit 200, a distance measurement unit 300, a system control unit 400, an analysis unit 410, an input/output unit 420, and a memory 430.

The non-contact gas measuring device 100, information correction unit 200, distance measurement unit 300, system control unit 400, analysis unit 410, input/output unit 420, and memory 430 are interconnected by a system bus 401. Note that the configuration and operation of the non-contact gas measuring device 100 are the same as those in FIG. 1, and therefore will not be described.

The information correction unit 200 acquires a correction wave that reduces measurement errors caused by the environment. This correction wave is an electromagnetic wave. For example, when measuring water vapor evaporated from the skin as the measurement target gas, the amount of water vapor in the air varies depending on the environment in which the user is present, which may affect the measurement value. For this reason, the correction wave acquired by the information correction unit 200 is used to eliminate the effects of water vapor caused by the environment.

The distance measurement unit 300 measures the distance from the distance measurement unit 300 to the target object 600. The system control unit 400 acquires various data and controls the non-contact gas measurement system 500. In particular, the system control unit 400 controls the non-contact gas measurement device 100 by referring to a control information management table 800 shown in FIG. 10 (described later) when measuring the measurement target gas 601.

The analysis unit 410 analyzes the measured values of the detected electromagnetic waves. The input/output unit 420 is an interface with the user, and is composed of an input unit 421 and an output unit 422 shown in FIG. 5, which will be described later. The input unit 421 is, for example, a button, and the output unit 422 is, for example, a display unit.

The memory 430 is made of a non-volatile semiconductor memory such as a flash memory, and stores received data and analysis results. In particular, it stores the control information management table 800 in FIG. 10 and the measurement result table 900 in FIG. 11, which will be described later.

<Overview of non-contact gas measurement system>
FIG. 5 is a schematic perspective view showing an example of the non-contact gas measurement system 500 of FIG.

The non-contact gas measurement system 500 is housed in a case 501, which is, for example, a rectangular parallelepiped, as shown in FIG. 5, and an input unit 421 and an output unit 422 are provided on the main surface of the case 501. In the example of FIG. 5, the input unit 421 is a button.

The user inputs information such as a command to start measurement and the selection of the gas to be measured from this input unit 421. The input unit 421 is not limited to a button and may be, for example, a touch panel or a keyboard.

In the example of FIG. 5, the output unit 422 is a liquid crystal display. Measurement results and the like are displayed on this output unit 422. The output unit 422 is not limited to a liquid crystal display, and may be, for example, an LED (Light Emitting Diode) or a buzzer.

The user presses a button that is the input unit 421. This starts gas measurement, and electromagnetic waves are emitted from the receiving/oscillating unit 101. Alternatively, by providing multiple input units 421, it is possible to allow the user to select the type of gas 601 to be measured.

The measurement results of the measurement target gas 601 are displayed on the output unit 422. This allows the user to know the measurement results. By using an LED in the output unit 422, it is possible to present information such as green light indicating the end of measurement and red light indicating a measurement error.

An emission port 504 is formed on a side surface 503 of the case 501. The emission port 504 emits electromagnetic waves oscillated by the receiving and oscillating unit 101 of the non-contact gas measuring device 100. The other components of the non-contact gas measuring system 500, including the information correction unit 200, the distance measurement unit 300, the system control unit 400, the analysis unit 410, and the memory 430, are housed in the case 501.

The analysis unit 410 refers to past data stored in the memory 430 and analyzes changes in the user's skin condition using time-series data including past history, rather than just measurements at a certain time.

Here, when the non-contact gas measurement system 500 is used by multiple users, information such as a number identifying each user may be added to the memory 430, so that the measurement data of multiple users can be stored so that each user can be identified.

<Examples of using the non-contact gas measurement system>
FIG. 6 is an explanatory diagram showing an example of the use of the non-contact gas measuring system 500 of FIG.

When measuring the skin of a user using the non-contact gas measurement system 500, the user points the emission port 504 of the case 501 in FIG. 5 toward the skin and presses the input unit 421 with a finger or the like, as shown in FIG. 6.

<Configuration Example of Information Correction Unit>
FIG. 7 is an explanatory diagram showing an example of the configuration of the receiving/oscillating unit 101 and the information correcting unit 200 included in the non-contact gas measuring system 500 of FIG.

The information correction unit 200 is for the receiving/oscillating unit 101 to obtain a correction wave that removes influences from sources other than the measurement target gas 601. The information correction unit 200 is composed of, for example, a mirror.

The information correction unit 200 is not limited to a mirror, but may be any reflecting object or optical element that reflects electromagnetic waves.

The information correction unit 200 is provided near the emission port 504 provided in the case 501, and is provided so as to face the electromagnetic wave emission surface of the receiving and oscillating unit 101. In this case, a portion of the electromagnetic wave emitted from the receiving and oscillating unit 101 hits the surface of the information correction unit 200 and is reflected. The receiving and oscillating unit 101 acquires the reflected wave of the information correction unit 200 as a correction wave.

When acquiring this correction wave, it is assumed that the target object 600 is far enough away from the non-contact gas measurement system 500 that it can measure. In other words, it is assumed that the target gas is not being measured.

Whether the object 600 is sufficiently far away is determined, for example, by the system control unit 400 in FIG. 4. The distance measurement unit 300 in FIG. 4 measures the distance to the object 600 when acquiring the correction wave. The measurement result is output to the system control unit 400 in FIG. 4.

The system control unit 400 determines that the object 600 is sufficiently far away when the distance measured by the distance measurement unit 300 is longer than a preset first measurement judgment distance. In addition, the first measurement judgment distance is stored in the memory 430, for example.

After acquiring the correction wave, the receiving/oscillating unit 101 emits an electromagnetic wave. The electromagnetic wave passes through the measurement target gas 601, strikes the target object 600, and measures the reflected wave. At this time, it is assumed that the distance between the receiving/oscillating unit 101 and the target object 600 is within a measurable range, and that the measurement target gas 601 can be measured.

Here too, the system control unit 400 judges whether or not the distance measured by the distance measurement unit 300 is within the measurable distance. If the distance measured by the distance measurement unit 300 is shorter than the second measurement judgment distance set in advance, the system control unit 400 judges that the object 600 is sufficiently close. The second measurement judgment distance is stored in the memory 430, for example.

The measurement wave of the target gas 601 also includes a correction wave. This is because the measurement wave includes a reflected wave that is reflected by the information correction unit 200 when the target gas 601 is measured. However, even if the measurement wave of the target gas 601 includes a correction wave, the target gas 601 can be measured with high accuracy by correcting the measurement wave using the correction wave obtained before measuring the target gas 601.

The electromagnetic waves emitted by the receiving oscillator 101 are collimated using the lens 103 as shown in FIG. 1, but they may be divergent rays instead of collimated. In that case, the lens 103 is not necessary.

In the case of parallel light, the influence of errors due to the measurement position during measurement can be suppressed. In the case of divergent light, the measurable distance is shorter, making it easier to obtain a correction wave that does not contain information about the measurement target gas 601.

<Other configuration examples of the information correction unit>
Fig. 8 is an explanatory diagram showing another example of the configuration of the receiving/oscillating unit 101 and the information correcting unit 200 included in the non-contact gas measuring system 500 of Fig. 4. Fig. 9 is an explanatory diagram following Fig. 8.

The information correction unit 200 shown in FIG. 8 has a mirror 201 and a motor 202. The information correction unit 200 in FIG. 7 is configured with only a mirror, and the mirror is fixed, but the information correction unit 200 in FIG. 8 is configured with a mirror 201 and a motor 202.

The mirror 201 is provided near the exit 504 provided in the case 501 in FIG. 5. In FIG. 8, the mirror 201 is attached so as to be rotatable around the two upper corners of the mirror 201 as the rotation axes.

The motor 202 rotates the mirror 201 based on a mode signal output from, for example, the system control unit 400 in FIG. 4. The mode signals output from the system control unit 400 include, for example, an information correction mode signal and a measurement mode signal. The information correction mode signal is a signal that is output when acquiring a correction wave, and the measurement mode signal is a signal that is output when measuring the measurement target gas 601.

When the information correction mode signal is output, the motor 202 rotates the mirror 201 as shown in FIG. 8 to move the mirror 201 to a position where the mirror 201 blocks the emission port 504. As a result, the electromagnetic wave emitted from the receiving/oscillating unit 101 is reflected by the mirror 201 and returns to the receiving/oscillating unit 101, thereby obtaining a correction wave.

When the measurement mode signal is output, the motor 202 rotates the mirror 201 by about 90° as shown in FIG. 9, and moves the mirror 201 to a position where it does not block the emission port 504. In other words, the mirror 201 is removed from between the receiving and oscillating unit 101 and the object 600. As a result, the electromagnetic wave emitted from the receiving and oscillating unit 101 passes through the gas to be measured 601, hits the object 600, and is reflected, so that the receiving and oscillating unit 101 can obtain the measurement wave of the gas to be measured 601.

Example of the Control Information Management Table Configuration
Next, the control information management table 800 will be described.

Figure 10 is an explanatory diagram showing an example of the configuration of the control information management table 800 referenced by the system control unit 400 of the non-contact gas measurement system 500 of Figure 4.

The control information management table 800 is a table that stores measurement control information. The measurement control information is information for measuring the measurement target gas 601, such as the frequency of the electromagnetic waves oscillated when the non-contact gas measuring device 100 measures the measurement target gas 601, and information regarding the acquisition of correction waves.

As shown in FIG. 10, the control information management table 800 has, from left to right, the items of measurement target gas name 801, frequency 802, and information correction control 803. The measurement target gas name 801 is information that identifies the measurement target gas 601. The frequency 802 indicates the frequency at which the measurement target gas 601 is measured. The information correction control 803 is information that indicates whether or not it is necessary to control the information correction unit 200 during measurement.

However, the items in the control information management table 800 are not limited to those shown in FIG. 10, and any information that controls the non-contact gas measuring device 100 and the information correction unit 200 may be stored. For example, the items may be voltage values or current values that control the non-contact gas measuring device 100.

The information stored in the control information management table 800 may be stored in advance in the memory 430 or may be acquired via a network. In addition, the user may edit the information stored in the control information management table 800.

Note that if control of the non-contact gas measuring device 100 and the information correction unit 200 is not required, the control information management table 800 is not required. The measurement control information does not depend on the data structure and may have any data structure. In addition to the control information management table 800 of FIG. 10, the measurement control information can be stored using a data structure appropriately selected from, for example, a list or a database.

This control information management table 800 may be stored, for example, in a memory (not shown) of the system control unit 400, rather than in the memory 430 as described above. Alternatively, it may be stored, for example, in an external storage device connected via a network.

Example of measurement result table configuration
FIG. 11 is an explanatory diagram showing an example of the measurement result table 900 stored in the memory 430 of the non-contact gas measuring system 500 of FIG.

The measurement result table 900 stores the results of the non-contact gas measurement system 500 measuring the measurement target gas 601 and analyzing the measurement results.

As shown in FIG. 11, the measurement result table 900 has, from left to right, the following fields: date and time 901, name of gas to be measured 902, frequency 903, presence or absence of target object 904, and value 905.

The date and time 901 indicates the date and time of measurement or analysis. The measurement target gas name 902 indicates information for identifying the measurement target gas 601. The frequency 903 indicates the frequency used to measure the measurement target gas 601. The presence or absence of target object 904 indicates whether or not the measurement target gas 601 was measured at the time of measurement. The value 905 indicates the value resulting from the measurement or analysis.

However, the items in the measurement result table 900 are not limited to those shown in FIG. 11, and other information acquired or generated by the non-contact gas measurement system 500 may be stored.

<Example of operation of non-contact gas measurement system>
Next, the measurement operation by the non-contact gas measurement system 500 will be described.

Figure 12 is a flowchart showing an example of a measurement process of the measurement target gas 601 by the non-contact gas measurement system 500 of Figure 4.

In the flowchart in Figure 12, unless otherwise specified, the system control unit 400 in Figure 4 will be the main control unit.

First, the user operates the input/output unit 420 to obtain input information (step S201). The input information is, for example, an instruction to start measurement issued by the user pressing a button on the input unit 421, as shown in FIG. 6. The input information entered by the user is received by the system control unit 400.

When the system control unit 400 accepts the input information, distance measurement is performed by the distance measurement unit 300 in FIG. 4, and a determination is started as to whether the measurement target gas 601 is within the measurement range (step S202).

Specifically, the system control unit 400 first controls the distance measurement unit 300 to measure the distance between the receiving oscillation unit 101 and the target object 600. The system control unit 400 compares the distance measured by the distance measurement unit 300 with the first measurement judgment distance stored in the memory 430, and judges whether the measurement target gas 601 is within or outside the measurement range.

For example, assume that the measurable distance of the non-contact gas measurement system 500 is approximately 10 cm. In this case, the first measurement judgment distance is approximately 10 cm. In the measurement results, if the distance between the receiving oscillator 101 and the object 600 is approximately 5 cm, it is determined to be within the measurement range because it is shorter than the first measurement judgment distance of approximately 10 cm, and if the measured distance is 15 cm, it is determined to be outside the measurement range because it is longer than 10 cm.

This determination result is stored in object presence/absence 904 in the measurement result table 900 in FIG. 11. As shown in FIG. 11, for example, if the determination result is within the measurement range, it is displayed as "Yes," and if the determination result is outside the measurement range, it is displayed as "No."

Next, the measurement control information is obtained from the control information management table 800 (step S203). Specifically, the system control unit 400 obtains the control information required for measuring the measurement target gas 601 from the control information management table 800 of FIG. 10 stored in the memory 430.

Using Figure 10 as an example, when measuring transepidermal water loss as the measurement target gas 601, the following information is obtained from the transepidermal water loss line of the measurement target gas name 801: frequency 802 of 0.558 THz, 0.600 THz, and information correction control 803 "Yes".

For ease of explanation, information is obtained from the control information management table 800 here, but control may also be performed based on information directly input by the user via the input unit 421.

Based on the information acquired in the process of step S203, the system control unit 400 determines whether or not to control the information correction unit 200 (step S204). For example, in FIG. 10, if the information correction control 803 is "Yes" (YES), the process proceeds to step S205, and if the information correction control 803 is "No" (NO), the process proceeds to step S206.

Whether or not information correction control 803 is present depends on the configuration of the non-contact gas measurement system 500 and the measurement target gas 601. For example, in the case of the information correction unit 200 shown in FIG. 7, information correction control is not required, so it is always "not present." On the other hand, in the case of the information correction unit 200 shown in FIG. 8, if a correction wave is required, it is "present," and if a correction wave is not required, it is "not present."

The system control unit 400 controls the information correction unit 200 (step S205). The process of this step S205 depends on the configuration of the information correction unit 200. For example, in the case of the information correction unit 200 shown in FIG. 8, the system control unit 400 controls the motor 202 of the information correction unit 200 to rotate the mirror 201 and move the mirror 201 to a position where it blocks the emission port 504.

Based on the control information acquired in the processing of step S203, the system control unit 400 determines whether or not to control the frequency of the electromagnetic waves emitted by the non-contact gas measuring device 100 (step S206).

Using the control information management table 800 in Figure 10 as an example, if the frequency 802 differs from the information set in the non-contact gas measuring device 100, control is necessary, so the process proceeds to step S207.

If frequency 802 is the same as the information set in the non-contact gas measuring device 100, no control is required, and the process proceeds to step S208. Specifically, when 0.558 THz is obtained from frequency 802, if the non-contact gas measuring device 100 is in a state where it can oscillate at 0.558 THz, it is left as is, but if they are different, the process in step S207 controls the non-contact gas measuring device 100 so that it can oscillate at 0.558 THz. Note that if the frequency of the non-contact gas measuring device 100 is fixed, this process is not required.

Then, based on the frequency control information in the processing of step S206, the non-contact gas measuring device 100 is controlled to set the electromagnetic waves to a specific frequency (step S207). For example, the frequency of the electromagnetic waves is changed by changing the voltage or current of the transmitter/receiver 102.

This starts the measurement of the measurement target gas 601, and the receiving and oscillating unit 101 acquires the current or voltage value (step S208). The measured value is stored in the value 905 of the measurement result table 900.

By referring to the control information acquired in the processing of step S203, it is determined whether or not all frequencies to be measured have been measured (step S209). If there are frequencies to be measured, the processing returns to step S206. If the measurement of all frequencies has been completed, the measurement ends.

Specifically, in the example of FIG. 10, if you want to measure transepidermal water loss as the measurement target gas 601, it is determined whether or not measurement has been completed at two frequencies 802, 0.558 THz and 0.600 THz, and this is repeated until the measurement is complete.

When the measurement is completed, the analysis unit 410 performs analysis using the value 905 in the measurement result table 900 (step S210).

Specifically, when the system control unit 400 receives notification that the measurement has ended, it instructs the analysis unit 410 to analyze the measured data, and the analysis unit 410 performs the analysis by referring to the measurement result table 900 in the memory 430.

For example, the calculation method for transepidermal water loss is as follows:

To calculate the amount of transepidermal water loss, analysis is performed using four patterns of electromagnetic waves. The first is electromagnetic waves irradiated onto the object 600 at a frequency that is highly sensitive to water vapor, for example, a frequency of about 0.558 THz. As the electromagnetic waves are reflected from the skin and return, the intensity is detected, including information on water vapor in the air, water vapor evaporated from the skin, absorption by the skin, and diffusion of internally reflected light.

The second is electromagnetic waves with a frequency that is highly sensitive to water vapor, for example, a frequency of about 0.558 THz, irradiated onto the information correction unit 200. Only the electromagnetic waves reflected by the mirror return, so the intensity containing information about the water vapor in the air is detected.

The third is electromagnetic waves irradiated onto the object 600 at a frequency that is insensitive to water vapor, for example, a frequency of about 0.600 THz. The electromagnetic waves reflected from the skin return, and the intensity is detected, including information on the absorption by the skin and the diffusion of internally reflected light.

The fourth is electromagnetic waves with a frequency to which water vapor has low sensitivity, for example, a frequency of about 0.600 THz, irradiated onto the information correction unit 200. Only the electromagnetic waves reflected by the mirror return and can be used as a reference signal.

The first and second detection results both include attenuation due to water vapor in the air. Therefore, the difference between the first and second results is the attenuation due to absorption by the skin and diffusion of internally reflected light, and the attenuation due to water vapor evaporated from the skin.

The difference between the third and fourth values is the attenuation due to absorption by the skin and diffusion of internally reflected light. Therefore, by subtracting the difference between the third and fourth values from the difference between the first and second values, it is possible to detect the attenuation due to water vapor evaporated from the skin.

Then, the system control unit 400 stores the results of the analysis performed in step S210 in the memory 430 (step S211). For example, the analysis results may be stored in the measurement result table 900 stored in the memory 430, or may be stored in another area of the memory 430. The process of step S211 may be omitted and the process may proceed to step S212.

Then, the system control unit 400 displays the analysis results on the output unit 422. For example, as shown in FIG. 5, the analysis results are displayed on the output unit 422 so that the user can recognize them (step S212).

If there is a malfunction in the non-contact gas measurement system 500, the system control unit 400 detects the malfunction and outputs an alert to the output unit 422. For example, if the output unit 422 is an LCD display, the contents of the alert are displayed. If the output unit 422 is a speaker or the like, the alert is communicated by sound such as voice or a buzzer. If the output unit 422 is an LED, the alert is communicated by light or the like.

As described above, by using a resonant tunneling diode or the like, the receiving/oscillating unit 101 that irradiates and receives electromagnetic waves can be integrated with a simple configuration, and the non-contact gas measuring device 100 can be made smaller.

In addition, since electromagnetic waves are irradiated onto the object 600 and the measurement target gas 601 is measured from the strength of the reflected waves, the receiving and oscillating unit 101 can be moved away from the object 600, i.e., measurements can be taken without contacting the skin surface.

This allows measurements to be taken without having to place the non-contact gas measuring device 100 in close contact with the user's skin, etc., making it possible to perform highly accurate measurements without restricting the measurement location. It also reduces the burden on the affected area of the user.

Furthermore, by measuring the gas to be measured using the correction wave from the information correction unit 200, the measurement accuracy of the non-contact gas measurement system 500 can be improved.

(Embodiment 2)
<Configuration example of reception oscillator and information corrector>
In the second embodiment, another example of the configuration of the receiving oscillator and the information corrector will be described.

Figure 13 is an explanatory diagram showing an example of the configuration of the reception oscillation unit 101, 101a and the information correction unit 200 according to this embodiment 2.

In the first embodiment shown in FIG. 7, a single receiving oscillator 101 is used to obtain both the measurement wave and the correction wave. In the case of FIG. 13, however, in addition to the first receiving oscillator 101, a second receiving oscillator 101a is newly provided.

In FIG. 13, the receiving/oscillating unit 101 is used when measuring the measurement target gas 601, and the receiving/oscillating unit 101a is used when measuring the correction wave. Note that the rest of the configuration of the non-contact gas measurement system 500 is the same as that of FIG. 4 of the first embodiment, so a description thereof will be omitted.

The information correction unit 200 is composed of, for example, a mirror, and is arranged to face the electromagnetic wave emission surface of the receiving and oscillating unit 101a. The information correction unit 200 acquires a correction wave for the receiving and oscillating unit 101a to remove the influence of gases other than the measurement target gas 601. The receiving and oscillating unit 101a irradiates the information correction unit 200 with an electromagnetic wave and acquires the reflected wave as a correction wave.

The receiving/oscillating unit 101 irradiates electromagnetic waves onto the object 600 to be measured, receives the reflected waves irradiated by the object 600, and obtains a current or voltage value according to the intensity of the received reflected waves. The electromagnetic waves emitted from the receiving/oscillating unit 101 pass through the gas 601 to be measured, hit the object 600, and are reflected back to measure the measurement waves.

As described above, by providing the receiving oscillator 101a, the correction wave can be obtained more accurately. As a result, the measurement target gas 601 can be measured with higher accuracy, and the reliability of the non-contact gas measurement system 500 can be improved.

(Embodiment 3)
In the third embodiment, a configuration in which the non-contact gas measurement system 500 is provided in a mobile terminal, for example, a smartphone or a tablet, will be described.

<Example of a mobile terminal configuration>
FIG. 14 is an explanatory diagram showing an example of the configuration of a portable terminal 560 according to the third embodiment.

The mobile terminal 560 is composed of a non-contact gas measurement system 500, an imaging unit 440, and a communication unit 450. The non-contact gas measurement system 500 has a similar configuration to the non-contact gas measurement system 500 of FIG. 4 in the first embodiment.

The imaging unit 440 is a camera that captures images. The imaging unit 440 is used in the technology for matching measurement positions and the technology for identifying measurements, which will be described later. The communication unit 450 is wirelessly connected to a communication line, such as an Internet line or a telephone communication line, and communicates with the outside world.

Figure 14 shows an example in which the communication unit 450 is connected to an externally connected server 460. The communication unit 450 transmits and receives information acquired by, for example, the non-contact gas measuring device 100, the distance measurement unit 300, and the imaging unit 440 to the server 460.

The imaging unit 440 may be, for example, an R (Red), G (Green), B (Blue) camera that is sensitive to visible light wavelengths, an infrared camera that is sensitive to infrared light, or an RGB camera that is sensitive to wavelengths from infrared light to visible light. Alternatively, it may be an RGB camera that is sensitive to wavelengths from visible light to ultraviolet light, or from infrared light via visible light to ultraviolet light.

The input/output unit 420 of the non-contact gas measurement system 500 may be an input/output unit such as a touch panel of the mobile terminal 560.

In FIG. 14, the non-contact gas measurement system 500 is provided on a mobile terminal 560 such as a smartphone, but for example, the non-contact gas measurement system 500 may be configured to newly add an imaging unit 440 and a communication unit 450, which are functions of the mobile terminal 560.

<Example of a mobile device>
Fig. 15 is an explanatory diagram showing an example of an overview of the portable terminal 560 of Fig. 14. Fig. 15(a) shows the front side of the portable terminal 560, and Fig. 15(b) shows the rear side of the portable terminal 560. Here, the surface on which the input/output unit 420 is provided is the front side of the portable terminal 560, and the surface opposite thereto is the rear side.

In the example of FIG. 15, the imaging unit 440 is configured to be able to capture images from both the front side of the mobile terminal 560 shown in FIG. 15(a) and the rear side of the mobile terminal 560 shown in FIG. 15(b).

Similarly, in the example of FIG. 15, the receiving/oscillating unit 101 is configured to be able to irradiate and receive electromagnetic waves from either the front side of the mobile terminal 560 shown in FIG. 15(a) or the back side shown in FIG. 15(b).

<Example of input/output section display>
FIG. 16 is an explanatory diagram showing an example of a display by input/output unit 420 of mobile terminal 560 of FIG.

In this case, the input/output unit 420 is, for example, a touch panel display. As shown in FIG. 16(a), the input/output unit 420 displays, for example, a menu screen on which the user selects the measurement target, and as shown in FIG. 16(b), images captured by the imaging unit 440 and analysis results.

The menu screen shown in FIG. 16(a) displays the names of measurable measurement target gases and allows the user to select one. By associating the menu button with the control information management table 800 in FIG. 10 of the first embodiment, the measurement target gas 601 selected by the user can be easily assigned to the input information in the processing of step S201 in FIG. 12, for example.

As a result of the measurement, as shown in FIG. 16(b), for example, a graph showing the amount of transepidermal water loss over time, a measurement position marker showing the previous measurement position acquired by the imaging unit 440, etc. may be displayed on the input/output unit 420.

<Example of mobile terminal operation>
FIG. 17 is a flowchart showing an example of the operation of gas measurement by the portable terminal 560 of FIG.

First, input information is acquired (step S301). The process of this step S301 is the same as the process of step S201 in FIG. 12 of the first embodiment. Next, the imaging unit 440 captures an image of the measurement site of the user, and the system control unit 400 analyzes the captured image (step S302).

This makes it possible to match the measurement position with the previous location and to recognize whether the measurement by the receiving oscillator 101 is being performed on the front or back side of the mobile terminal 560.

Explain the technology used to match measurement positions.

When performing long-term monitoring, it is desirable to align the measurement position and measure approximately the same area. Therefore, the measurement area is identified from the image results captured by the imaging unit 440 last time or up to now, and the result is displayed on the output unit 422 to inform the user.

The measurement position marker may be displayed on the input/output unit 420, or a speaker or the like may be used to notify the difference between the measurement position marker and the current position captured by the imaging unit 440 through sound, such as a change in pitch, a change in volume, or a voice.

This section describes a measurement identification technique that identifies whether the measurement by the receiving oscillator 101 is being performed on the front or back of the mobile terminal 560.

For example, it is determined whether the object 600 was photographed by the imaging unit 440 in FIG. 15(a), i.e., the front side of the mobile terminal 560, or whether the object 600 was photographed by the imaging unit 440 in FIG. 15(b), i.e., the rear side of the mobile terminal 560, and the receiving/oscillating unit 101 performs measurement on the side where the image was photographed.

This allows easy imaging of the measurement target gas 601 whether it is on the front or back of the mobile terminal. Specifically, when measuring the arm, the receiving and oscillating unit 101 on the back side in FIG. 15(b) is used, and when measuring the face, etc., the receiving and oscillating unit 101 on the front side in FIG. 15(a) is used. This allows the user to perform measurements while looking at the display, which is the input/output unit 420.

In FIG. 17, when the image analysis is completed, the measurement target gas 601 is measured (step S303). The process of this step S303 is similar to the processes of steps S202 to S209 in FIG. 12.

Next, the measurement results are transmitted (step S304). The system control unit 400 transfers the measurement results and the like to the externally connected server 460 via the communication unit 450. The server 460 then analyzes the transferred measurement results (step S305).

Specifically, the measurement results obtained in the process of step S304 and the image analysis results obtained in the process of step S302 are transmitted from the communication unit 450 to the server 460. The server 460 executes all or part of the complex analysis. The specific process is the same as the process of step S210 in FIG. 12. This makes it possible to reduce the processing load of the non-contact gas measurement system 500.

The communication unit 450 acquires the results of the analysis performed by the server 460 (step S306). The system control unit 400 displays the results acquired from the server 460 on the input/output unit 420 (step S307). At this time, the system control unit 400 stores the results acquired from the server 460 in the memory 430.

By providing the non-contact gas measurement system 500 on the mobile terminal 560, convenience for the user can be improved. In addition, since the measurement target gas 601 is analyzed by the external server 460, the measurement target gas 601 can be analyzed in a shorter time.

In addition, since the non-contact gas measurement system 500 does not need the function of analyzing the measurement target gas 601, the configuration of the non-contact gas measurement system 500 can be simplified, which also contributes to miniaturization and cost reduction.

The invention made by the inventor has been specifically described above based on the embodiment, but the present invention is not limited to the above embodiment and includes various modified examples. For example, if a monocular camera capable of simultaneously acquiring a color image and a distance image is used, the functions of the imaging unit 440 and the distance measurement unit 300 in FIG. 14 can be realized, thereby realizing a compact, low-cost non-contact gas measurement system.

100 Non-contact gas measuring device 101 Receiving/oscillating section 101a Receiving/oscillating section 102 Transmitter/receiver 103 Lens 110 Control section 200 Information correction section 201 Mirror 202 Motor 300 Distance measurement section 400 System control section 401 System bus 410 Analysis section 420 Input/output section 421 Input section 422 Output section 430 Memory 440 Imaging section 450 Communication section 460 Server 500 Non-contact gas measuring system 560 Portable terminal 600 Object 601 Gas to be measured

Claims (9)

In the skin analysis system,
A non-contact gas measuring device that measures a target gas emitted from a subject's skin by using electromagnetic waves;
an analysis unit that analyzes the measurement target gas from a measurement value measured by the non-contact gas measuring device;
a system control unit that controls operations of the non-contact gas measuring device and the analysis unit;
A display unit;
having
The non-contact gas measuring device comprises:
An electronic device that oscillates electromagnetic waves in the negative resistance region,
Irradiating the skin of the subject with the electromagnetic waves, and outputting to the analysis unit, as a measurement value, a voltage or current value that changes according to the intensity of the electromagnetic waves reflected from the skin of the subject;
A skin analysis system, wherein the display unit displays information regarding the skin condition as a result based on the analysis by the analysis unit. In the skin analysis system,
A non-contact gas measuring device that measures a target gas emitted from a subject's skin by using electromagnetic waves;
an analysis unit that analyzes the measurement target gas from a measurement value measured by the non-contact gas measuring device;
a system control unit that controls operations of the non-contact gas measuring device and the analysis unit;
A display unit;
having
The non-contact gas measuring device comprises:
Irradiating the skin of the subject with the electromagnetic waves, and outputting to the analysis unit, as a measurement value, a voltage or current value that changes according to the intensity of the electromagnetic waves reflected from the skin of the subject;
The display unit displays information about a skin condition as a result based on the analysis by the analysis unit,
A skin analysis system comprising an information correction unit that acquires a correction electromagnetic wave for correcting the measurement value measured by the non-contact gas measuring device. The skin analysis system according to claim 2,
the information correction unit has a reflector that reflects electromagnetic waves,
A skin analysis system in which the electromagnetic wave emitted by the non-contact gas measuring device is reflected by the reflecting object to obtain a corrected electromagnetic wave that does not contain information about the gas to be measured. The skin analysis system according to claim 2,
The non-contact gas measuring device includes a first receiving/oscillating unit and a second receiving/oscillating unit,
the first receiving and oscillating unit irradiates an electromagnetic wave onto the skin of the subject and measures the measurement value;
The second receiving and oscillating unit irradiates the information correcting unit with an electromagnetic wave to obtain a corrected electromagnetic wave that does not include information about the gas to be measured. The skin analysis system according to claim 2,
a distance measuring unit that measures a distance to the skin of the subject;
The system control unit compares the distance measured by the distance measurement unit with a predetermined first measurement judgment distance, and if the measured distance is longer than the first measurement judgment distance, irradiates electromagnetic waves from the non-contact gas measuring device and obtains them as the corrected electromagnetic waves. A skin analysis device, comprising:
A communication unit for connecting to a communication network;
an output unit that outputs information;
An imaging unit that acquires an image;
A non-contact gas measuring device that measures a target gas emitted from a subject's skin by using electromagnetic waves;
an analysis unit that analyzes the measurement target gas from a measurement value measured by the non-contact gas measuring device;
A system control unit that controls the operation of the skin analysis device;
A display unit;
Equipped with
The non-contact gas measuring device comprises:
Irradiating the skin of the subject with the electromagnetic waves, and outputting to the analysis unit, as a measurement value, a voltage or current value that changes according to the intensity of the electromagnetic waves reflected from the skin of the subject;
the display unit displays information about a skin condition as a result based on the analysis by the analysis unit;
the system control unit recognizes the measurement site when the target gas was previously measured from an image of the subject's skin captured by the imaging unit when measuring the target gas, and outputs information indicating the measurement site to the output unit when measuring the target gas for the first time. A non-contact gas measuring device that measures a target gas emitted from a subject's skin by using electromagnetic waves;
an analysis unit that analyzes a measurement value of an electromagnetic wave measured by the non-contact gas measuring device;
a system control unit that controls operations of the non-contact gas measuring device and the analysis unit;
A display unit;
A skin analysis method using a skin analysis system comprising:
The non-contact gas measuring device irradiates electromagnetic waves onto the skin of the subject;
a step of receiving electromagnetic waves reflected from the skin of the subject by the non-contact gas measuring device, and outputting a voltage or current value that changes according to the intensity of the received electromagnetic waves as a measurement value to the analysis unit;
a step of displaying information about a skin condition as a result based on the analysis by the analysis unit by the display unit;
having
The skin analysis system includes a distance measurement unit that measures a distance to the skin of the subject,
a step of determining whether or not the distance between the skin of the subject measured by the distance measurement unit is within a measurement range of the measurement target gas;
The analysis unit analyzes the measurement target gas from a measurement value measured by the non-contact gas measuring device;
a step of controlling the non-contact gas measuring device to irradiate electromagnetic waves to the skin of the subject when the system control unit determines that the subject is within a measurement range;
A skin analysis method comprising: A non-contact gas measuring device that measures a target gas emitted from a subject's skin by using electromagnetic waves;
an analysis unit that analyzes a measurement value of an electromagnetic wave measured by the non-contact gas measuring device;
a system control unit that controls operations of the non-contact gas measuring device and the analysis unit;
A display unit;
A skin analysis method using a skin analysis system comprising:
The non-contact gas measuring device irradiates electromagnetic waves onto the skin of the subject;
a step of receiving electromagnetic waves reflected from the skin of the subject by the non-contact gas measuring device, and outputting a voltage or current value that changes according to the intensity of the received electromagnetic waves as a measurement value to the analysis unit;
a step of displaying information about a skin condition as a result based on the analysis by the analysis unit by the display unit;
having
the skin analysis system includes an information correction unit that acquires a correction electromagnetic wave for correcting the measurement value measured by the non-contact gas measuring device,
The step of analyzing the gas to be measured comprises correcting an error in the measurement value using a corrected electromagnetic wave acquired by the information correcting unit. A non-contact gas measuring device that measures a target gas emitted from a subject's skin by using electromagnetic waves;
an analysis unit that analyzes a measurement value of an electromagnetic wave measured by the non-contact gas measuring device;
a system control unit that controls operations of the non-contact gas measuring device and the analysis unit;
A display unit;
A skin analysis method using a skin analysis system comprising:
The non-contact gas measuring device irradiates electromagnetic waves onto the skin of the subject;
a step of receiving electromagnetic waves reflected from the skin of the subject by the non-contact gas measuring device, and outputting a voltage or current value that changes according to the intensity of the received electromagnetic waves as a measurement value to the analysis unit;
a step of displaying information about a skin condition as a result based on the analysis by the analysis unit by the display unit;
having
a step of the system control unit recognizing a measurement site at which the measurement target gas was previously measured from the acquired image of the skin of the subject;
a step of the system control unit outputting information indicating the measurement site when the measurement target gas is newly measured;
A skin analysis method comprising:

Images