KR102467435B1 - Body temperature estimation system and method considering external temperature change - Google Patents

Abstract

The present invention relates to a system and a method for estimating body temperature considering external temperature changes, which estimate the body temperature of a target to be measured in consideration of rapid changes in external temperature when body temperature is continuously measured. The system for estimating body temperature comprises: a temperature measuring unit; and a temperature estimating unit. The temperature measuring unit is attached to the skin of the target and measures the skin temperature and the external temperature. The temperature estimating unit receives the skin temperature and the external temperature from the temperature measuring unit, and estimates the body temperature based on a correlation between the received skin temperature and the external temperature. The temperature estimating unit monitors the amount of change in external temperature per monitoring time. As a result of the monitoring, if the change in external temperature is equal to or greater than a threshold value, the temperature estimating unit estimates the body temperature estimated before the change in external temperature equal to or greater than the threshold value as the current body temperature.

Description

Body temperature estimation system and method considering external temperature change

The present invention relates to a technology for providing body temperature, and more particularly, when the body temperature is continuously measured, the body temperature considering the change in external temperature for estimating the body temperature of a subject in consideration of the change in external temperature according to the rapid change in the temperature of a space. It relates to estimation systems and methods.

Recently, in the medical industry, efforts are being made to create new types of medical devices or medical services by converging ICT (Information and Communications Technologies) and to increase efficiency. For the purpose of providing differentiated medical services to patients and their guardians, various types of sensors are attached to patients to collect and analyze the patient's biosignals in real time, followed by research to utilize the patient's biometric information for patient treatment. We are preparing to provide medical services together.

Among biometric information, body temperature is the most basic diagnostic information and is an index that reflects various physiological changes. Body temperature measurement is mandatory for most diseases. Recently, the importance of measuring body temperature has been emphasized due to the influence of COVID-19.

Existing methods of measuring body temperature are carried out in a regular check method in which a nurse visits a hospital room at a certain time to measure and record the body temperature of a patient when a subject to be measured is a patient. Recently, research and attempts to measure body temperature using a medical patch technology attached to human skin have been actively conducted. This change in the body temperature measurement method automatically measures and records the body temperature for a long time periodically through a medical patch without the patient's sense of rejection, thereby minimizing the patient's discomfort due to temperature measurement and greatly increasing the work intensity of nurses' regular checks. can reduce This is expected to enable smart and efficient medical services to be provided to patients.

When such a medical patch is attached to the skin and the body temperature is measured over a long period of time in an environment where the subject lives, the temperature of the space where the subject is located affects the measured external temperature. Due to this, when the space temperature rapidly changes, since the external temperature changes greatly, the accuracy of the body temperature estimated (measured) by the medical patch is inevitably lowered.

Publication No. 2020-0021711 (published on March 2, 2020)

Accordingly, an object of the present invention is to provide a system and method for estimating body temperature taking into account external temperature change for estimating the body temperature of a measurement subject in consideration of change in external temperature due to rapid change in space temperature when body temperature is continuously measured.

In order to achieve the above object, the present invention is a wearable temperature patch attached to the skin of a subject to be measured and continuously estimating the body temperature, comprising: a base film; a skin temperature sensor installed on the base film and contacting the skin of the subject to measure skin temperature at regular intervals; an external temperature sensor installed on the base film and measuring the external temperature outside the skin of the subject at regular intervals; And installed on the base film, receiving the skin temperature measured from the skin temperature sensor, receiving the external temperature measured from the external temperature sensor, and estimating the body temperature based on the correlation between the received skin temperature and the external temperature, Provide a wearable temperature patch comprising: a control unit that monitors a change in external temperature per monitoring time and, if the change in external temperature is greater than or equal to a threshold value, estimates a body temperature estimated before a change in external temperature equal to or greater than the threshold value as a current body temperature. do.

The monitoring time may be 5 minutes or less.

The monitoring time may be 1 minute to 5 minutes.

The threshold may be greater than or equal to 0.5.

The control unit calculates the change in external temperature by the following formula, and if the change in external temperature calculated at the monitoring time of (t _{i+1 -} t _i ) is greater than or equal to a threshold value, the measured value at time t _i+1 The external temperature and skin temperature may be replaced with the external temperature and skin temperature measured at time t _i , and the body temperature at time t _i+1 may be estimated by a correlation between the replaced skin temperature and the external temperature.

[mathematical expression]

T _i : External temperature at time t _i

T _i+1 : External temperature at time t _i+1

t _i+1 ―t _i : monitoring time

The correlation can be expressed by the following equation.

[mathematical expression]

T _est : estimated body temperature

k: external influence proportionality constant

T ₂ : outside temperature

T ₃ : skin temperature

t : measurement time (unit; minute)

α: temperature transfer time (unit: minutes)

The present invention also provides a body temperature estimating system for continuously estimating the body temperature of a subject to be measured, comprising: a temperature measuring unit attached to the skin of the subject to measure skin temperature and external temperature; and receiving the skin temperature and the external temperature from the temperature measuring unit, estimating the body temperature based on the correlation between the received skin temperature and the external temperature, monitoring the amount of change in the external temperature per monitoring time, and determining the amount of change in the external temperature to be greater than or equal to a threshold value. If this is the case, a body temperature estimating unit for estimating the body temperature estimated before a change in external temperature equal to or greater than the threshold value as the current body temperature is provided.

The present invention is also a body temperature estimating system for continuously estimating the body temperature of a subject to be measured, comprising: the wearable temperature patch attached to the skin of the subject to continuously estimate the body temperature; and a management terminal receiving the estimated body temperature of the subject from the wearable temperature patch.

And the present invention, the body temperature estimating unit receiving the measurement subject's skin temperature and the external temperature from the temperature measurement unit attached to the measurement subject's skin; estimating the body temperature in a correlation between the skin temperature received by the body temperature estimation unit and the external temperature; monitoring the amount of change in external temperature per monitoring time by the body temperature estimation unit; and estimating, by the body temperature estimating unit, the body temperature estimated before a change in external temperature equal to or greater than the threshold value as the current body temperature, when the amount of change in the external temperature during monitoring is determined to be greater than or equal to a threshold value. A method for estimating body temperature is provided.

According to the present invention, it is possible to more accurately estimate the body temperature of a measurement target even when a rapid temperature change occurs in a space where the measurement target is located. That is, the wearable temperature patch attached to the skin of the measurement subject estimates the estimated body temperature before the change in external temperature as the current body temperature when the amount of change in external temperature measured per hour is greater than or equal to a threshold value. That is, a change in external temperature due to an external environment occurring in a short time may cause a large error between the actual body temperature of the subject to be measured and the body temperature estimated by the wearable temperature patch. Therefore, in the present invention, when a rapid change in external temperature occurs in a short time, when estimating the body temperature by reflecting the skin temperature and external temperature measured by the wearable temperature patch, the current external temperature is ignored and the external temperature before the temperature change occurs Estimate the body temperature of the measurement subject by reflecting the temperature and skin temperature. In other words, the wearable temperature patch estimates the body temperature estimated by reflecting the external temperature and skin temperature before the rapid external temperature change as the current body temperature at the time of the temperature change, thereby reducing the error in the estimated body temperature according to the rapid external temperature change. can be corrected.

Therefore, the present invention is expected to expand the use of a wearable temperature patch attachable to the skin because it can correct an error in body temperature measurement due to a rapid temperature change in the external environment, enabling more accurate and continuous body temperature measurement.

Since the wearable temperature patch according to the present invention secures a type of wearable technology that is attached to the skin of a subject to be measured and enables continuous body temperature measurement in daily life, it is possible to more accurately record continuous body temperature measurement for a long time in times of social confusion such as the recent COVID-19 epidemic Through this, it is expected that medical staff can use it to determine the confirmation of contagion.

The body temperature estimation method using the wearable temperature patch according to the present invention can more accurately estimate the body temperature of a measurement subject by reflecting motion information in an environment where a rapid change in external temperature occurs. That is, for a sudden change in external temperature, the movement information measured by the wearable temperature patch is used to determine and classify whether it is a temperature change due to the movement of the measurement subject's space or a temperature change caused by the operation of the air conditioner while staying in a certain place. The body temperature is estimated by the correlation between the external temperature and the skin temperature before the rapid external temperature change. In addition, the body temperature of the subject to be measured can be more accurately estimated by reflecting the weight of the motion information classified in the estimated body temperature.

1 is a block diagram showing a system for estimating body temperature in consideration of changes in external temperature according to the present invention.
2 is a block diagram showing a system for estimating body temperature in consideration of changes in external temperature according to an embodiment of the present invention.
FIG. 3 is a block diagram showing the wearable temperature patch of FIG. 2 .
4 is a plan view showing a lower surface of a wearable temperature patch according to an embodiment of the present invention.
5 is a plan view showing an upper surface of a wearable temperature patch according to an embodiment of the present invention.
6 is a cross-sectional view showing a wearable temperature patch according to an embodiment of the present invention, showing a state in which a second base film is bent over a first base film;
7 is a view showing a state in which a wearable temperature patch according to an embodiment of the present invention is attached to a wrist.
8 is a flowchart illustrating a first example of a method for estimating body temperature in consideration of a change in external temperature using a body temperature estimation system according to an embodiment of the present invention.
9 is a graph showing skin temperature and external temperature synchronized with spatial movement of a subject to be measured.
10 is a graph showing a skin temperature and an external temperature measured by a wearable temperature patch in an environment of rapid spatial temperature change.
FIG. 11 is a graph showing body temperature measured by a body part thermometer in the rapidly changing space temperature environment of FIG. 10 .
FIG. 12 is a graph showing skin temperature, external temperature, and body temperature measured in the environment of rapid spatial temperature change in FIG. 10 .
13 is a normalized graph of skin temperature, external temperature, and body temperature measured in the problem section of FIG. 12 .
FIG. 14 is a graph showing skin temperature, external temperature, and temperature variation measured per minute in the environment of rapid spatial temperature change in FIG. 10 .
15 is a flowchart illustrating a second example of a method for estimating body temperature in consideration of a change in external temperature using a body temperature estimation system according to an embodiment of the present invention.
16 is a graph showing measurement data of an inertia measurement unit according to the movement of a measurement target.

It should be noted that in the following description, only parts necessary for understanding the embodiments of the present invention are described, and descriptions of other parts will be omitted without departing from the gist of the present invention.

The terms or words used in this specification and claims described below should not be construed as being limited to ordinary or dictionary meanings, and the inventors have appropriately used the concept of terms to describe their inventions in the best way. It should be interpreted as a meaning and concept consistent with the technical spirit of the present invention based on the principle that it can be defined in the following way. Therefore, the embodiments described in this specification and the configurations shown in the drawings are only preferred embodiments of the present invention, and do not represent all of the technical spirit of the present invention, so various equivalents that can replace them at the time of the present application. It should be understood that there may be variations and variations.

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

[Body temperature estimation system]

1 is a block diagram showing a system for estimating body temperature in consideration of changes in external temperature according to the present invention.

Referring to FIG. 1, the body temperature estimation system (400; hereinafter referred to as 'body temperature estimation system') in consideration of changes in external temperature according to the present invention measures the body temperature of a subject based on the measured external temperature in providing the body temperature of a subject over a long period of time. It is a system that estimates and provides the body temperature of the measurement subject by correcting the skin temperature. The body temperature estimation system 400 according to the present invention is a system that estimates and provides the body temperature of a measurement subject in consideration of a rapid change in external temperature.

The body temperature estimating system 400 according to the present invention includes a temperature measuring unit 93 and a body temperature estimating unit 97 .

The temperature measuring unit 93 is attached to the skin of a measurement target and continuously measures skin temperature and external temperature at regular intervals.

The body temperature estimation unit 97 receives the skin temperature and the external temperature from the temperature measurement unit 93 and estimates the body temperature based on a correlation between the received skin temperature and the external temperature. For example, the body temperature estimator 97 extracts the external temperature that affects the skin temperature according to the heat transfer characteristics of the temperature measurement unit 93 based on the time when the skin temperature is measured. Further, the body temperature estimation unit 97 may estimate the body temperature of the measurement subject at the time when the skin temperature is measured from the correlation between the skin temperature and the extracted external temperature.

Here, the temperature measuring unit 93 is attached to the skin and measures the skin temperature and the external temperature at regular intervals. In this case, the predetermined period may be several seconds. For example, the predetermined period may be 5 seconds. The temperature measuring unit 93 time-synchronizes the measured skin temperature and the external temperature and outputs the measured skin temperature to the body temperature estimating unit 97 .

The temperature measurement unit 93 may be implemented as a wearable temperature patch of a patch type attachable to the skin. The temperature measuring unit 93 measures the skin temperature through the surface attached to the skin, and measures the external temperature through the surface facing the outside opposite to the skin.

Here, the external temperature is the external heat effect factor (T1) that has a thermal effect on the skin by the external environment, such as sunlight, solar heat, outdoor temperature, air conditioning and heating facilities in the building, clothing, bedding, etc. means In other words, the external temperature was defined as the temperature of the space between the clothing worn by the measurement subject and the skin, not the representative temperature of the space in terms of architecture. The reason is that it may be considered to measure the architectural space representative temperature in real time and reflect it in the body temperature estimation system 400, but it is not competitive in terms of cost and system configuration. At the same time, between the clothing and the skin where the architectural external heat effect is reflected, the space temperature after being filtered by the clothing is a key part that affects the body temperature estimated in the present invention.

The skin temperature is a body temperature detected from the skin in which an external temperature by an external heat influence factor is reflected.

Therefore, it is preferable that the temperature measurement unit 93 measures the external temperature above the skin temperature measurement part.

The external temperature that affects the skin temperature can be extracted based on the temperature transfer time derived by Pearson's product moment correlation coefficient. Pearson's correlation coefficient is related to the heat transfer characteristics of the temperature measuring part. The external temperature passes through the temperature measuring unit to affect the skin temperature, and a temperature transfer time is required for the external temperature to be transferred to the skin temperature. For example, the extracted external temperature may be an external temperature measured at a previous time (temperature transfer time) within 5 minutes based on the skin temperature measurement time.

The correlation for estimating the body temperature can be expressed by Equation 1 below.

T_est: estimated body temperature

k: external influence proportionality constant

T2: external temperature

T3: skin temperature

t : measurement time (unit; minute)

α: temperature transfer time (unit: minutes)

Here, the external influence proportionality constant (k) can be calculated by a data driven method for the external temperature and skin temperature collected from a plurality of measurement subjects. As described above, the temperature transfer time (α) can be derived from Pearson's correlation coefficient.

Modeling of the correlation according to Equation 1 will be described later.

The body temperature estimation unit 97 estimates the body temperature of the measurement subject based on the skin temperature and the external temperature received from the temperature measurement unit 93 . The body temperature estimating unit 97 estimates the body temperature in consideration of the thermal effect in a section where a rapid temperature change occurs in the space where the measurement subject is located. That is, the body temperature estimation unit 97 monitors the amount of change in external temperature per monitoring time. The body temperature estimator 97 estimates the body temperature estimated before the change in external temperature equal to or greater than the threshold value as the current body temperature when the change in external temperature is greater than or equal to the threshold value as a result of the monitoring. That is, the body temperature estimating unit 97 uses the body temperature estimated before the rapid temperature change as a reference value when the measurement target is exposed to an environment in which a rapid temperature change occurs and an external temperature change equal to or higher than the threshold value occurs. estimate the body temperature

Here, the monitoring time and the threshold value are reference values for determining a rapid change in external temperature, and the monitoring time may be 5 minutes or less, preferably between 1 minute and 5 minutes. The threshold may be determined at 0.5 or higher.

The body temperature estimator 97 calculates the amount of change in external temperature at the monitoring time of (t _{i+1 -} t _i ) using Equation 2 below. If the change in external temperature calculated at the monitoring time (t _{i+1 -} t _i ) is greater than or equal to the threshold value, the body temperature estimating unit 97 converts the external temperature and skin temperature measured at time t _i+1 to time t _i Replace with the measured external temperature and skin temperature. The body temperature estimating unit 97 estimates the body temperature at time t _i+1 based on the correlation between the replaced skin temperature and the external temperature. That is, if the calculated change in external temperature is equal to or greater than the threshold value, the body temperature estimation unit 97 estimates the body temperature estimated at time t _i as the body temperature at time t _i+1 .

T _i : External temperature at time t _i

T _i+1 : External temperature at time t _i+1

t _i+1 ―t _i : monitoring time

In this way, when a rapid change in external temperature occurs during the monitoring time, the body temperature estimation unit 97 estimates the body temperature at time t _{i +1} using the body temperature estimated at time t i as a reference value.

Also, the body temperature estimation system 400 according to the present invention may further include a motion measurement unit 95 . The motion measurement unit 95 measures the motion of the subject to be measured. That is, the motion measuring unit 95 measures motions generated while the subject moves naturally through various spaces and provides the measured motions to the body temperature estimating unit 97 .

The body temperature estimator 97 may correct and estimate the current body temperature by reflecting motion information of the subject to be measured. Here, the motion information includes the type and intensity of motion. For example, the type of movement may include sitting, standing, walking, running, and the like. The strength of the motion may be determined by the type of motion and the motion time.

The body temperature estimator 97 may classify and manage the estimated body temperature by reflecting the movement of the subject to be measured, or estimate the body temperature by giving a weight when estimating the body temperature. That is, when the body temperature estimating unit 97 detects a rapid temperature change, the motion information received from the motion measurement unit 95 is used to determine whether the temperature change is due to the spatial movement of the measurement subject, or whether the air conditioner is operated while in a certain place. It determines whether the temperature change according to the According to the determination result, the body temperature estimation unit 97 may classify and manage the estimated body temperature. Alternatively, according to the determination result, the body temperature estimator 97 may estimate the body temperature by giving a weight. For example, when the rapid temperature change is a temperature change due to the spatial movement of the measurement subject, since the body temperature can usually rise due to the movement of the measurement subject, the body temperature estimating unit 97 operates before the external temperature change occurs. A current body temperature may be estimated by adding a weight to the estimated body temperature. In addition, when the rapid temperature change is a temperature change caused by the operation of an air conditioner, the body temperature estimation unit 97 estimates the body temperature estimated before the external temperature change as the current body temperature because movement of the measurement subject rarely occurs. can do.

The body temperature estimation system 400 according to the present invention may be implemented in the embodiments shown in FIGS. 2 to 7, but is not limited thereto.

2 is a block diagram showing a body temperature estimating system 400 considering external temperature change according to an embodiment of the present invention.

Referring to FIG. 2 , a temperature estimation system 400 according to the present embodiment includes a wearable temperature patch 100 and a management terminal 200 . In addition, the temperature estimation system 400 according to the present embodiment may further include a body part thermometer 300 .

The body part thermometer 300 measures and outputs the body temperature of the subject's body part. The body part thermometer 300 measures the temperature of one part of the body among the chest, forehead, armpit, ear, and ear lobe. The body part thermometer 300 may be a commercial thermometer.

The body thermometer 300 is used to model a correlation for estimating body temperature according to the present embodiment, and to check the accuracy of the body temperature estimated from the modeled correlation with the body temperature measured by the body thermometer 300. . In order to model the correlation for estimating body temperature, it is preferable to use a body part thermometer 300 capable of accurately measuring body temperature. In this embodiment, an example of using a forehead thermometer as the body part thermometer 300 is disclosed, but is not limited thereto.

Therefore, the temperature estimation system 400 according to the present embodiment may not include the body part thermometer 300 .

The wearable temperature patch 100 extracts the external temperature that affects the skin temperature according to the heat transfer characteristics of the wearable temperature patch 100 based on the skin temperature measurement time. The wearable temperature patch 100 estimates the body temperature of the measurement subject at the time when the skin temperature is measured from the correlation between the skin temperature and the extracted external temperature.

The wearable temperature patch 100 is attached to the skin of a measurement target and continuously measures skin temperature and external temperature at regular intervals. The wearable temperature patch 100 may time-synchronize and output skin temperature and external temperature. The wearable temperature patch 100 may be a flexible temperature sensor module implemented as a flexible patch type. Such a wearable temperature patch 100 may perform a function of a temperature measuring unit.

Also, the management terminal 200 estimates the body temperature of the measurement subject based on the skin temperature and the external temperature received from the wearable temperature patch 100 . That is, the management terminal 200 receives the skin temperature and the external temperature from the wearable temperature patch 100 . The management terminal 200 may extract the external temperature that affects the skin temperature according to the heat transfer characteristics of the wearable temperature patch 100 based on the time when the skin temperature is measured. Also, the management terminal 200 estimates the body temperature of the measurement subject at the time when the skin temperature is measured from the correlation between the skin temperature and the extracted external temperature. The management terminal 200 is a communication terminal used by an administrator, and may be, for example, a PC, smart phone, laptop, tablet PC, dedicated terminal, or server. This management terminal 200 may perform the function of the body temperature estimation unit.

Here, communication may be performed between the body part thermometer 300 , the wearable temperature patch 100 , and the management terminal 200 in a wireless communication method. As a wireless communication method, a short-distance wireless communication method may be used. As a short-range wireless communication method, Bluetooth, Bluetooth Low Energy (BLE), Wi-Fi, Zig bee, NFC (Near Field Communication), or the like may be used.

Meanwhile, in this embodiment, an example in which the management terminal 200 performs the function of the body temperature estimating unit has been disclosed, but is not limited thereto.

For example, the wearable temperature patch 100 may include a temperature measuring unit and a temperature estimating unit's temperature extraction function, and the management terminal 200 may include a body temperature estimating unit's body temperature estimating function.

That is, after measuring the external temperature and skin temperature, the wearable temperature patch 100 extracts the external temperature that affects the skin temperature according to the heat transfer characteristics of the wearable temperature patch 100 based on the measurement time of the skin temperature. . The wearable temperature patch 100 transmits skin temperature, external temperature, and extracted external temperature to the management terminal 200 . Also, the management terminal 200 estimates the body temperature of the measurement subject at the time when the skin temperature is measured from the correlation between the skin temperature and the extracted external temperature.

In addition, the management terminal 200 estimates the body temperature in consideration of the heat effect in a section where a rapid temperature change occurs in the space where the measurement subject is located. That is, the management terminal 200 monitors the amount of change in external temperature per monitoring time. As a result of monitoring, the management terminal 200 estimates a body temperature estimated before a change in external temperature equal to or greater than the threshold value as the current body temperature, when the change in external temperature is equal to or greater than the threshold value.

Alternatively, the wearable temperature patch 100 includes a temperature measuring unit and a temperature estimating unit. The management terminal 200 may receive, output, or manage skin temperature, external temperature, extracted external temperature, or estimated body temperature from the wearable temperature patch 100 .

That is, after measuring the external temperature and skin temperature, the wearable temperature patch 100 extracts the external temperature that affects the skin temperature according to the heat transfer characteristics of the wearable temperature patch 100 based on the measurement time of the skin temperature. . The wearable temperature patch 100 estimates the body temperature of the measurement subject at the time when the skin temperature is measured from the correlation between the skin temperature and the extracted external temperature.

In addition, the wearable temperature patch 100 estimates the body temperature in consideration of the heat effect in a section where a rapid temperature change occurs in a space where a measurement subject is located. That is, the wearable temperature patch 100 monitors the change in external temperature per monitoring time. As a result of monitoring, the wearable temperature patch 100 estimates a body temperature estimated before a change in external temperature equal to or greater than the threshold value as the current body temperature, when the change in external temperature is greater than or equal to a threshold value as a result of monitoring.

The wearable temperature patch 100 according to this embodiment will be described with reference to FIGS. 3 to 6 .

FIG. 3 is a block diagram showing the wearable temperature patch 100 of FIG. 2 .

Referring to FIG. 3 , the wearable temperature patch 100 according to the present embodiment includes flexible base films 10 and 30 and a skin temperature sensor 50 . The base films 10 and 30 have a mounting area 15 where the skin temperature sensor 50 is to be mounted, and heat conduction blocking slots 17 and 19 blocking heat conduction to the mounting area 15 are formed. The skin temperature sensor 50 is mounted on the mounting area 15 of the base films 10 and 30 and contacts the skin to measure the skin temperature. In addition, the wearable temperature patch 100 according to the present embodiment may further include an external temperature sensor 60 , a ground layer 40 , and a generating element 70 .

As described above, the wearable temperature patch 100 according to the present embodiment forms the heat conduction blocking slots 17 and 19 around the skin temperature sensor 50, so that the skin temperature sensor 50 rides on the base films 10 and 30. Heat conduction can be prevented. That is, the influence of the internal heat effect factor can be reduced by the heat conduction blocking slots 17 and 19 .

First, looking at the internal heat effect factor, the thermal conduction effect in the printed circuit board including the base films 10 and 30 affects the skin around the skin temperature sensor 50 through the ground layer 40 or the electrode layer in the printed circuit board. Heat generated during driving of the heatable element 70 may be conducted to the skin temperature sensor 50 to affect the measured body temperature.

Therefore, in order to block the heat effect caused by the internal heat effect factor, the heat conduction blocking slots 17 and 19 are formed in the present embodiment.

The thermal conduction blocking slots 17 and 19 include the guard slots 17 formed in the base films 10 and 30 along the circumference of the skin temperature sensor 50, the mounting area 15 in which the skin temperature sensor 50 is mounted, and At least one of the boundary slots 19 formed at the boundary of the region where the ground layer 40 is formed may be included. The boundary slot 19 includes at least one of a first boundary slot 21 formed in the base films 10 and 30 and a second boundary slot 23 formed in the ground layer 40 . In this embodiment, an example in which the guard slot 17 and the boundary slot 19 are formed together and the first and second boundary slots 21 and 23 are formed together has been disclosed.

The base films 10 and 30 include a first base film 10 and a second base film 30 . The second base film 30 is connected to the first base film 10 and is bent over the first base film 10 .

Here, the skin temperature sensor 50 , the ground layer 40 , and the heat generating element 70 are formed on the first base film 10 . An external temperature sensor 60 is formed on the second base film 30 .

The skin temperature sensor 50 is mounted on one side of the first base film 10 .

The ground layer 40 is formed on the first base film 10 spaced apart from the mounting area 15 where the skin temperature sensor 50 is mounted.

The heat generating element 70 is formed on the first base film 10 spaced apart from the mounting area 15 where the skin temperature sensor 50 is mounted. At this time, the heat generating element 70 may be formed in the region where the ground layer 40 is formed.

Here, the heat generating element 70 is elements included in the wearable temperature patch 100 and means elements that can affect the skin temperature sensor 50 according to an internal heat effect factor. The heat generating element 70 may include a communication unit 71 , a storage unit 73 , a control unit 75 , a power supply unit 77 and an inertia measurement unit 79 .

The communication unit 71 communicates with the management terminal 200 . The communication unit 71 may use a short-distance wireless communication method as a communication method with the management terminal 200 .

The storage unit 73 stores the skin temperature measured by the skin temperature sensor 50 or the external temperature measured by the external temperature sensor 60 .

The controller 75 is a microprocessor that controls overall operations of the wearable temperature patch 100 . Here, the control unit 75 transmits the temperature measured by the skin temperature sensor 50 and the external temperature sensor 60 or the temperature stored in the storage unit 73 to the management terminal 200 through the communication unit 71 .

The power supply unit 77 supplies power required for operation to the skin temperature sensor 50, the communication unit 71, the storage unit 73, and the control unit 75. The power supply unit 77 is an electrical energy storage device that can be charged and discharged several times, and may include, for example, at least one of a secondary battery and a supercapacitor. The power supply unit 77 may include an energy harvesting unit that collects energy around the wearable temperature patch 100, such as body temperature and wireless signals, and generates electric energy.

In addition, the inertia measurement unit 79 measures the motion of the measurement target to whom the wearable temperature patch 100 is attached. The inertia measurement unit 79 measures the speed, direction, gravity, and acceleration of the subject to be measured. The inertial measuring unit recognizes and measures the motion of the measurement target using an accelerometer, an angular velocity meter, a geomagnetic machine, or an altimeter. In this way, the inertia measurement unit 79 measures the movement that occurs while the measurement subject moves naturally through various spaces and outputs the measured motion to the control unit 75 .

4 is a plan view showing a lower surface of the wearable temperature patch 100 according to an embodiment of the present invention. 5 is a plan view showing an upper surface of the wearable temperature patch 100 according to an embodiment of the present invention. 6 is a cross-sectional view showing the wearable temperature patch 100 according to an embodiment of the present invention, showing a state in which the second base film 30 is bent over the first base film 10 .

4 to 6, the wearable temperature patch 100 according to the present embodiment includes flexible base films 10 and 30 and a skin temperature sensor 50, an external temperature sensor 60, and a ground layer ( 40), a heat generating element 70 and a protective layer 80 may be further included.

The base films 10 and 30 are insulating films made of a flexible plastic material. Materials for the base films 10 and 30 include polyimide, polyethersulphone (PES), polyacrylate (PAR), polyetherimide (PEI), and polyethylene naphthalate. napthalate (PEN), polyethylene terephthalate (PET), polyphenylene sulfide (PPS), polyallylate, polycarbonate (PC), cellulose triacetate (CTA) or cellulose acetate Propionate (cellulose acetate propinonate; CAP) and the like may be used, but is not limited thereto.

These base films 10 and 30 include a first base film 10 and a second base film 30 . The first and second base films 10 and 30 each have upper surfaces 13 and 33 and lower surfaces 11 and 31 opposite to the upper surfaces 13 and 33 . Here, since the second base film 30 is bent and positioned on the upper surface 13 of the first base film 10, in the plan views of FIGS. 4 and 5, the lower surface 11 of the first base film 10 ) and the upper surface 33 of the second base film 30 are located on the same surface, and the upper surface 13 of the first base film 10 and the lower surface 31 of the second base film 30 are the same. will be located on the side.

The skin temperature sensor 50 and the ground layer 40 are formed on the lower surface 11 of the first base film 10 . The skin temperature sensor 50 and the ground layer 40 are spaced apart from each other. The first base film 10 has a fuming element mounted on the top surface 13 of the first base film 10 .

An external temperature sensor 60 is formed on the upper surface 33 of the second base film 30 . The second base film 30 is formed to be narrower in width than the first base film 10 so that it can be easily bent with respect to the first base film 10 and positioned on the first base film 10 .

When the second base film 30 is bent relative to the first base film 10, the lower surface 11 of the first base film 10 on which the skin temperature sensor 50 is mounted faces the skin side, and The temperature sensor 60 is bent so that it faces outward. That is, after the lower surface 11 of the first base film 10 and the upper surface 33 of the second base film 30 face downward, the upper surface 13 of the first base film 10 is placed on top. The lower surface 31 of the second base film 30 is bent to be positioned.

An example of the ground layer 40 formed on the lower surface 11 of the first base film 10 has been disclosed, but is not limited thereto. For example, the ground layer 40 may be formed inside the first base film 10 .

The skin temperature sensor 50 is a resistance film type temperature sensor based on a platinum material, and includes an internal sensor unit 51 and an internal electrode unit 53. The internal sensor unit 51 measures the body temperature (skin temperature) of the contacted skin. The internal electrode unit 53 is connected to the internal sensor unit 51 and transmits the measured skin temperature to the storage unit 73 or the control unit 75. The internal electrode unit 53 may be formed of a plurality of lines, one of which is connected to the ground layer 40, and the other is a storage unit 73 or control unit 75 to deliver the measured skin temperature. can be connected to

The guard slot 17 is formed through the first base film 10 around the skin temperature sensor 50 . The guard slot 17 is formed in a shape surrounding the skin temperature sensor 50 and is not formed in a portion where the internal electrode part is formed. That is, the guard slot 17 is formed in a shape surrounding the internal sensor unit 51, and a portion where the internal electrode unit 53 is connected and drawn out of the internal sensor unit 51 is open.

The boundary slot 19 includes a first boundary slot 21 and a second boundary slot 23 . The first boundary slot 21 may be formed on both sides of the internal electrode part 53 . The second boundary slot 23 may be formed in the ground layer 40 to cover the side of the controller 75 facing the skin temperature sensor 50 . The second boundary slot 23 is formed through the ground layer 40 and the first base film 10 .

As described above, the wearable temperature patch 100 according to the present embodiment forms the guard slot 17 or the boundary slot 19 around the skin temperature sensor 50, so that the skin temperature sensor ( 50) can block heat conduction. That is, the influence of the internal heat effect factor can be reduced by the guard slot 17 or the boundary slot 19 in the skin temperature measured by the skin temperature sensor 50 .

The heat generating element 70 is mounted on the upper surface 13 of the first base film 10 . The heat generating element 70 is mounted on the upper surface 13 of the first base film 10 opposite to the lower surface 11 of the first base film 10 on which the ground layer 40 is formed.

The protective layer 80 protects the heat generating element 70 from the external environment. The protective layer 80 may be formed by laminating a plastic resin protective film on the upper surface 13 of the first base film 10 on which the heat generating element 70 is mounted. Alternatively, the protective layer 80 may be formed by applying or molding a liquid plastic resin. A plastic material or non-woven fabric capable of providing flexibility to the first base film 10 may be used as a material for the protective layer 80 .

The second base film 30 bent over the first base film 10 may be attached on the protective layer 80 .

And the external temperature sensor 60 is mounted on the upper surface 33 of the second base substrate. The external temperature sensor 60 is a resistance film type temperature sensor based on a platinum material, and includes an external sensor unit 61 and an external electrode unit 63 . The external sensor unit 61 measures the external temperature applied to the wearable temperature patch 100 toward the side opposite to the skin. The external electrode unit 63 is connected to the external sensor unit 61 and transmits the measured external temperature to the storage unit 73 or the control unit 75 . The external electrode unit 63 may be formed of a plurality of lines, one of the plurality of lines is connected to the ground layer 40, and the other is the storage unit 73 or the control unit 75 to deliver the measured external temperature. can be connected to

In this way, the external temperature sensor 60 measures the external temperature according to the external heat influence factor.

7 is a view showing a state in which the wearable temperature patch 100 according to an embodiment of the present invention is attached to a wrist.

Referring to FIG. 7 , the wearable temperature patch 100 according to the present embodiment can be attached to various body parts of a subject to be measured using an attachment pad 18 . 7 discloses an example in which the wearable temperature patch 100 is attached to the wrist by the attachment pad 18 . The attachment pad 18 may be an adhesive tape made of flexible plastic, paper, or non-woven fabric.

The wearable temperature patch 100 is attached to the wrist so that the skin temperature sensor 50 faces the skin of the wrist. The wearable temperature patch 100 is attached to the wrist so that the external temperature sensor 60 is located directly below the attachment pad 18 facing the outside of the wrist.

[Body temperature estimation method]

The body temperature estimation method using the body temperature estimation system according to the present embodiment will be described with reference to FIGS. 2 and 8 to 16.

Body temperature estimation method according to the first example

8 is a flowchart illustrating a first example of a method for estimating body temperature in consideration of a change in external temperature using a body temperature estimation system according to an embodiment of the present invention.

First, in step S10, the wearable temperature patch 100 is attached to the skin of a measurement target and continuously measures the skin temperature and the external temperature at regular intervals. In this case, the predetermined period may be several seconds. For example, the predetermined period may be 5 seconds. The wearable temperature patch 100 outputs the measured skin temperature and external temperature to the management terminal 200 in time synchronization.

Next, in step S30, the management terminal 200 receives the skin temperature and the external temperature.

Next, in step S50, the management terminal 200 estimates the body temperature based on the correlation between the received skin temperature and the external temperature. That is, the management terminal 200 extracts the external temperature that affects the skin temperature according to the heat transfer characteristics of the wearable temperature patch 100 based on the time when the skin temperature is measured. The management terminal 200 estimates the body temperature of the measurement subject at the time when the skin temperature is measured from the correlation between the skin temperature and the extracted external temperature. For example, body temperature can be estimated by Equation 1.

Next, in step S70, the management terminal 200 monitors the change in external temperature per monitoring time. That is, the management terminal 200 determines whether the change in external temperature is greater than or equal to a threshold value. Here, the monitoring time and the threshold value are reference values for determining a rapid change in external temperature, and the monitoring time may be determined between 1 minute and 5 minutes. The threshold may be determined at 0.5 or higher.

If it is less than the threshold as a result of the determination in step S70, it is performed again from step S10.

And, if the determination result in step S70 is equal to or greater than the threshold value, in step S90 , the management terminal 200 estimates the body temperature estimated before a change in external temperature equal to or greater than the threshold value as the current body temperature.

The body temperature estimation method according to the first example was confirmed through specific experimental examples shown in FIGS. 9 to 14 . As shown in FIG. 7 , the wearable temperature patch 100 according to the present embodiment was attached to the wrist of the subject to be measured. The wearable temperature patch 100 measured skin temperature, external temperature, and motion information generated in the process of naturally moving in various spaces while living a daily life.

9 is a graph showing skin temperature and external temperature synchronized with spatial movement of a subject to be measured.

Referring to FIG. 9, the subject of measurement with the wearable temperature patch attached is shown in red letters when the skin temperature and the external temperature measured every 5 seconds are synchronized with the location and temperature of the space while moving frequently in the laboratory, coffee shop, and rooftop. Problems occur as part. The problem section is a section that becomes a spatial and temporal boundary when the subject of measurement moves from the first space to the second space. It can be seen that a rapid change in the external temperature occurs in the problem section. At this time, the laboratory has a space temperature of 27 to 28 degrees, the coffee shop is 25 degrees, and the rooftop is 32 degrees.

Such a problem section may be caused not only by movement between spaces having different temperatures, but also by a change in space temperature within the same space, as shown in FIG. 10 .

10 is a graph showing a skin temperature and an external temperature measured by a wearable temperature patch in an environment of rapid spatial temperature change.

Referring to FIG. 10, the skin temperature and external temperature before and after operating the air conditioner were measured every 5 seconds with a wearable temperature patch while the subject was located indoors in the laboratory. The space temperature before the air conditioner was turned on was 28 degrees, and the space temperature after the air conditioner was turned on was measured at 26 degrees. The measured space temperature, skin temperature, and external temperature are synchronized with time and displayed as shown in FIG. 10 .

When such a rapid change in space temperature occurs, it can be confirmed that the external temperature measured at the wrist part rapidly drops within 5 minutes and then partially rises within 10 minutes to be measured constantly.

It can be seen that the measured skin temperature shows a pattern similar to that of the measured external temperature, although the variation is not large compared to the external temperature.

FIG. 11 is a graph showing body temperature measured by a body part thermometer in the rapidly changing space temperature environment of FIG. 10 .

Referring to FIG. 11, the body temperature was measured using a commercial thermometer (IRT6510/Brown) approved by the Ministry of Food and Drug Safety as a body part thermometer.

As a result of the measurement, it can be confirmed that the body temperature is constantly maintained at 36.5 to 36.6 degrees even in a rapidly changing temperature environment. Moreover, considering that the tolerance range of the commercial thermometer is ㅁ0.3 degrees, it can be confirmed that the body temperature measured by the commercial thermometer is kept very constant.

When the measurement results of FIGS. 10 and 11 are graphically expressed, they are shown in FIGS. 12 and 13 . Here, FIG. 12 is a graph showing skin temperature, external temperature, and body temperature measured in the rapidly changing space temperature environment of FIG. 10 . 13 is a normalized graph of skin temperature, external temperature, and body temperature measured in the problem section of FIG. 12 .

Referring to FIGS. 12 and 13 , it can be seen that the measured skin temperature and external temperature change according to the change in space temperature, but the body temperature is maintained constant.

Reliability of the body temperature estimated by using the correlation between the external temperature measured by the wearable temperature patch and the skin temperature in a general environment where a rapid change in space temperature does not occur, that is, a space where a constant temperature is maintained, can be secured.

On the other hand, when a rapid change in space temperature occurs, it can be confirmed that the external temperature measured at the wrist part rapidly drops within 5 minutes (t ₁ ) and then partially rises within 10 minutes (t ₂ ) and is measured regularly. can

Therefore, in an environment where rapid temperature change occurs, for example, when moving from outdoors to indoors or when the temperature of the indoor space changes rapidly due to the operation of an air conditioner or heater, the external temperature and The body temperature estimated using the skin temperature correlation has a large error from the actually measured body temperature.

As shown in FIG. 13, when the skin temperature, external temperature, and measured body temperature of the problem section are normalized and compared, after about 15 minutes (t ₁ +t ₂ ) after the temperature change occurs, the skin temperature and external temperature adapt to the temperature change of the space. And it can be confirmed that the measured body temperature converges to a constant temperature.

It can be seen that the measured skin temperature changes in a pattern similar to that of the measured external temperature, although the amount of change is not large compared to the external temperature.

Based on changes in skin temperature, external temperature, and body temperature measured in this rapid temperature change environment, the present embodiment provides a body temperature estimation method as follows.

FIG. 14 is a table showing skin temperature, external temperature, and temperature change amount measured per minute in the rapidly changing space temperature environment of FIG. 10 .

Referring to FIG. 14 , the table shows skin temperature and external temperature measured per minute in an environment of rapid spatial temperature change. The measurement data is skin temperature and external temperature measured by the wearable temperature patch according to the present embodiment. In the table, "out" on the left represents the external temperature, and "In" represents the skin temperature.

The measurement data displayed in green at the 1st in the table is the measurement data before a sudden temperature change.

After that, a rapid change in space temperature occurred, and accordingly, the data measured in 1 minute units were displayed in 2nd to 5th green. The data visualized and displayed as out/in on the right side of the table is the difference between the measurement data just before and the current measurement data. In the table, "out" on the right side represents a change in external temperature per minute, and "In" represents a change in skin temperature per minute.

For example, looking at the values of the out part marked in pink, it can be confirmed that the temperature change of 0.67 in the second, 1.34 in the third, 1.07 in the fourth, and 1.82 in the fifth.

Such a temperature change is actually a phenomenon that exceeds a temperature change that may occur due to the effect of a change in body temperature. That is, the change in external temperature must be identified as an effect caused by the change in space temperature, and the change in body temperature caused by the change in the body can be accurately measured only when these influence values are filtered.

In this embodiment, a method for estimating body temperature when 0.5 or more occurs as a threshold value for determining a rapid change in external temperature is provided. That is, in the body temperature estimation method according to the present embodiment, body temperature estimation is performed using measurement data before a sudden temperature change occurs for the first time as a reference value.

According to the table, the first measurement data, 34.05 (out) / 35.6 (In), is maintained as a reference value, and the body temperature is estimated using the correlation between the skin temperature and the external temperature in the rapid temperature change section. That is, the body temperature estimated by the first measurement data is estimated as the current body temperature in the rapid temperature change section.

When a sudden change of 0.67 degrees (more than 0.5 degrees) in the first external temperature change is detected, the change in external temperature is 0.67 degrees, but the external temperature is corrected to 34.05 degrees. Although the change in skin temperature is -0.1 degrees, the skin temperature is corrected to 35.6 degrees. That is, the current external temperature and skin temperature are corrected by using the external temperature and skin temperature measured before a rapid temperature change occurs as reference values.

Even when a sudden change of 1.34 degrees in the second external temperature is sensed, the external temperature is corrected to 34.05 degrees, although the change in external temperature is 1.34 degrees. Although the change in skin temperature is 0.09 degrees, the skin temperature is corrected to 35.6 degrees.

In addition, even when the third, fourth, and fifth rapid temperature changes are detected, the external temperature is corrected to 34.05 degrees and the skin temperature is corrected to 35.6 degrees.

When such a rapid temperature change is detected, the body temperature is estimated by maintaining the external temperature and the skin temperature before the rapid temperature change occurs as reference values. If a sudden temperature change is not detected, the difference between the temperature before the sudden change and the stabilized temperature after the sudden change is corrected in the same way, and based on the correlation between the previously used skin temperature and the external temperature, the current body temperature to estimate

Meanwhile, when the space temperature rapidly changes, it can be seen that the external temperature changes rapidly, but the change in skin temperature is relatively small. Therefore, when correcting the temperature in a rapidly changing temperature environment, only the external temperature may be corrected with a reference value, and the current body temperature may be estimated using a correlation between the external temperature according to the reference value and the measured skin temperature. Such body temperature estimation can be applied when the difference between the measured skin temperature according to the change in space temperature and the reference value is not large. For example, the difference value may be 0.2 or less.

Body temperature estimation method according to the second example

Meanwhile, in the body temperature estimation method according to the first example, a method of estimating body temperature by reflecting rapid temperature change in an external environment has been disclosed, but is not limited thereto. For example, as shown in FIG. 15 , the body temperature may be estimated by reflecting rapid temperature changes in the external environment and movements of the subject to be measured.

A second example of the body temperature estimation method according to the present embodiment will be described with reference to FIGS. 2 and 15 as follows. 15 is a flowchart illustrating a second example of a method for estimating body temperature in consideration of a change in external temperature using a body temperature estimation system according to an embodiment of the present invention.

The body temperature estimating method according to the second example is a method of estimating body temperature by reflecting a movement of a subject to be measured and a rapid change in external temperature.

First, in step S10, the wearable temperature patch 100 is attached to the skin of the measurement target and measures the skin temperature and the external temperature at regular intervals. In this case, the predetermined period may be several seconds. For example, the predetermined period may be 5 seconds. The wearable temperature patch 100 outputs the measured skin temperature and external temperature to the management terminal 200 in time synchronization.

In step S20, the wearable temperature patch 100 measures the movement of the subject to be measured. The wearable temperature patch 100 time-synchronizes the measured movement information with the measured skin temperature and external temperature and outputs the measured motion information to the management terminal 200 .

At this time, although the example in which steps S10 and S20 are performed in parallel has been disclosed, step S20 may be performed after step S10 or step S10 may be performed after step S20.

Next, in step S30, the management terminal 200 receives skin temperature, external temperature, and movement information.

Next, in step S50, the management terminal 200 estimates the body temperature based on the correlation between the received skin temperature and the external temperature. That is, the management terminal 200 extracts the external temperature that affects the skin temperature according to the heat transfer characteristics of the wearable temperature patch 100 based on the time when the skin temperature is measured. The management terminal 200 estimates the body temperature of the measurement subject at the time when the skin temperature is measured from the correlation between the skin temperature and the extracted external temperature. For example, body temperature can be estimated by Equation 1.

Next, in step S70, the management terminal 200 monitors the change in external temperature per monitoring time. That is, the management terminal 200 determines whether the change in external temperature is greater than or equal to a threshold value. Here, the monitoring time and the threshold value are reference values for determining a rapid change in external temperature, and the monitoring time may be determined between 1 minute and 5 minutes. The threshold may be determined at 0.5 or higher.

If it is less than the threshold as a result of the determination in step S70, it is performed again from step S10.

And, if the determination result in step S70 is equal to or greater than the threshold value, in step S80, the management terminal 200 classifies the motion of the subject of measurement based on the received motion information. That is, with respect to the rapid temperature change determined in step S70, the management terminal 200 utilizes the received motion information to determine whether the temperature change is due to the movement of the measurement target's space or the temperature change due to the operation of the air conditioner while in a certain place. distinguish

And, in step S90, the management terminal 200 estimates the current body temperature using the body temperature estimated before a change in external temperature equal to or greater than the threshold, but reflects the weight corresponding to the motion information classified in the previously estimated body temperature to reflect the current body temperature. estimate the body temperature

16 is a graph showing measurement data of an inertia measurement unit according to the movement of a measurement target.

Movement information according to the movement form of the measurement target to whom the wearable temperature patch 100 is attached is measured by the inertia measuring unit 79 . In the present embodiment, motion information is measured at intervals of 0.1 second by using an acceleration sensor as an inertia measurement unit 79, and the measured motion information can be visually displayed as shown in FIG. 16 .

Referring to FIG. 16 , it can be seen that the higher the movement, the higher the peak appears. It can be seen that the peaks of movement appear in the order of sitting, standing, and walking.

As described above, according to the body temperature estimation method of the second example, the body temperature of the subject to be measured can be more accurately estimated by reflecting motion information in an environment where a rapid change in external temperature occurs.

On the other hand, the embodiments disclosed in this specification and drawings are only presented as specific examples to aid understanding, and are not intended to limit the scope of the present invention. In addition to the embodiments disclosed herein, it is obvious to those skilled in the art that other modifications based on the technical idea of the present invention can be implemented.

10: first base film 11, 31: lower surface
13, 33: upper surface 15: mounting area
17: guard slot 19: boundary slot
21: first boundary slot 23: second boundary slot
30: second base film 40: ground layer
50: skin temperature sensor 51: internal sensor unit
53: internal electrode unit 60: external temperature sensor
61: external sensor unit 63: external electrode unit
70: heat generating element 71: communication unit
73: storage unit 75: control unit
77: power supply unit 79: inertial measurement unit
80: protective layer 93: temperature measuring unit
95: motion measuring unit 97: body temperature estimating unit
100: wearable temperature patch 200: management terminal
300: body part thermometer 400: body temperature estimation system

Claims (12)

A wearable temperature patch attached to the skin of a subject to continuously estimate body temperature,
a flexible base film including a first base film and a second base film connected to the first base film and bent over the first base film;
a skin temperature sensor mounted on a lower surface of the first base film and contacting the skin of the subject to measure skin temperature at regular intervals;
an external temperature sensor mounted on an upper surface of the second base film and measuring an external temperature outside the skin of the subject at regular intervals;
It is installed on the first base film, receives the skin temperature measured from the skin temperature sensor, receives the external temperature measured from the external temperature sensor, and estimates the body temperature based on the correlation between the received skin temperature and the external temperature, a control unit that monitors a change in external temperature per monitoring time and, when the change in external temperature is greater than or equal to a threshold value, estimates a body temperature estimated before a change in external temperature equal to or greater than the threshold value as a current body temperature; and
A ground layer formed on the first base film and spaced apart from a mounting area in which the skin temperature sensor is mounted;
The first base film,
A heat conduction blocking slot is formed to block heat conduction to the mounting area,
The heat conduction blocking slot,
a guard slot formed in the first base film along a circumference of the skin temperature sensor; and
a boundary slot formed at a boundary between the mounting area and the area where the ground layer is formed;
Wearable temperature patch comprising a. According to claim 1,
The wearable temperature patch, characterized in that the monitoring time is 5 minutes or less. According to claim 1,
The wearable temperature patch, characterized in that the monitoring time is 1 minute to 5 minutes. According to claim 3,
The wearable temperature patch, characterized in that the threshold value is 0.5 or more. The method of claim 1, wherein the control unit,
The change in external temperature is calculated by Equation 1 below, and if the change in external temperature calculated at the monitoring time of (t _{i+1 -} t _i ) is greater than or equal to the threshold value, the external temperature measured at time t _i+1 and The wearable temperature patch, characterized in that replacing the skin temperature with the external temperature measured at time t _i and the skin temperature, and estimating the body temperature at the time t _i+1 with a correlation between the replaced skin temperature and the external temperature.
[Equation 1]

T _i : External temperature at time t _i
T _i+1 : External temperature at time t _i+1
t _i+1 ―t _i : monitoring time According to claim 1,
The wearable temperature patch, characterized in that the correlation is expressed by Equation 2 below.
[Equation 2]

T _est : estimated body temperature
k: external influence proportionality constant
T ₂ : outside temperature
T ₃ : skin temperature
t : measurement time (unit; minute)
α: temperature transfer time (unit: minutes) It is a body temperature estimation system that continuously estimates the body temperature of the measurement subject,
a temperature measurement unit attached to the skin of the subject to measure skin temperature and external temperature; and
The skin temperature and the external temperature are received from the temperature measuring unit, the body temperature is estimated based on the correlation between the received skin temperature and the external temperature, the change in external temperature per monitoring time is monitored, and the change in the external temperature is greater than a threshold value. , a body temperature estimator for estimating the body temperature estimated before a change in external temperature equal to or greater than the threshold value as the current body temperature;
The temperature measuring unit,
a flexible base film including a first base film and a second base film connected to the first base film and bent over the first base film;
a skin temperature sensor mounted on a lower surface of the first base film and contacting the skin of the subject to measure skin temperature at regular intervals;
an external temperature sensor mounted on an upper surface of the second base film and measuring an external temperature outside the skin of the subject at regular intervals; and
A ground layer formed on the first base film and spaced apart from a mounting area in which the skin temperature sensor is mounted;
The first base film,
A heat conduction blocking slot is formed to block heat conduction to the mounting area,
The heat conduction blocking slot,
a guard slot formed in the first base film along a circumference of the skin temperature sensor; and
a boundary slot formed at a boundary between the mounting area and the area where the ground layer is formed;
Body temperature estimation system considering external temperature change that includes. The method of claim 7, wherein the body temperature estimating unit,
The change in external temperature is calculated by Equation 1 below, and if the change in external temperature calculated at the monitoring time of (t _{i+1 -} t _i ) is greater than or equal to the threshold value, the external temperature measured at time t _i+1 and Considering the external temperature change, characterized in that the skin temperature is replaced with the external temperature and skin temperature measured at time t _i , and the body temperature at the time t _{i +1} is estimated by the correlation between the replaced skin temperature and the external temperature Body temperature estimation system.
[Equation 1]

T _i : External temperature at time t _i
T _i+1 : External temperature at time t _i+1
t _i+1 ―t _i : monitoring time It is a body temperature estimation system that continuously estimates the body temperature of the measurement subject,
a wearable temperature patch attached to the skin of the subject to continuously estimate a body temperature; and
A management terminal receiving the estimated body temperature of the subject from the wearable temperature patch;
The wearable temperature patch,
a flexible base film including a first base film and a second base film connected to the first base film and bent over the first base film;
a skin temperature sensor mounted on a lower surface of the first base film and contacting the skin of the subject to measure skin temperature at regular intervals;
an external temperature sensor mounted on an upper surface of the second base film and measuring an external temperature outside the skin of the subject at regular intervals;
It is installed on the first base film, receives the skin temperature measured from the skin temperature sensor, receives the external temperature measured from the external temperature sensor, and estimates the body temperature based on the correlation between the received skin temperature and the external temperature, a control unit that monitors a change in external temperature per monitoring time and, when the change in external temperature is greater than or equal to a threshold value, estimates a body temperature estimated before a change in external temperature equal to or greater than the threshold value as a current body temperature; and
A ground layer formed on the first base film and spaced apart from a mounting area in which the skin temperature sensor is mounted;
The first base film,
A heat conduction blocking slot is formed to block heat conduction to the mounting area,
The heat conduction blocking slot,
a guard slot formed in the first base film along a circumference of the skin temperature sensor; and
a boundary slot formed at a boundary between the mounting area and the area where the ground layer is formed;
Body temperature estimation system considering external temperature change, characterized in that it comprises a. The method of claim 9, wherein the control unit,
The change in external temperature is calculated by Equation 1 below, and if the change in external temperature calculated at the monitoring time of (t _{i+1 -} t _i ) is greater than or equal to the threshold value, the external temperature measured at time t _i+1 and Considering the external temperature change, characterized in that the skin temperature is replaced with the external temperature and skin temperature measured at time t _i , and the body temperature at the time t _{i +1} is estimated by the correlation between the replaced skin temperature and the external temperature body temperature estimation system
[Equation 1]

T _i : External temperature at time t _i
T _i+1 : External temperature at time t _i+1
t _i+1 ―t _i : monitoring time delete delete

Images