JP2022111548A - Deep part body temperature estimation device, deep part body temperature estimation method, and deep part body temperature estimation program - Google Patents

Abstract

To accurately estimate a deep part body temperature of a person to be measured.SOLUTION: A deep part body temperature estimation device includes: a first measuring unit 1 for measuring a heart rate or a pulse rate of a person to be measured; a second measuring unit 2 for measuring a skin temperature of the person to be measured; an amount-of-heat calculation unit 9 for calculating an amount of heat that flows into and outflows from deep parts of a first body part and a second body part, and the skin of the person to be measured on the basis of the heart rate or the pulse rate and the skin temperature of the person to be measured; and a temperature calculation unit 8 for calculating a deep part temperature of the person to be measured on the basis of the amount of heat.SELECTED DRAWING: Figure 1

Description

The present invention relates to a core body temperature estimation device, a core body temperature estimation method, and a core body temperature estimation program for estimating the core body temperature of a person to be measured.

In recent years, many people have been transported by ambulance due to heat stroke, and the total number of people transported by ambulance due to heat stroke nationwide from May to September 2019 was 71,317 (see Non-Patent Document 1). It is said that measurement of core body temperature is effective for diagnosis of heat stroke and reduction of the risk of heat stroke (see Non-Patent Document 2).

In order to monitor core body temperature, it is necessary to measure rectal temperature, bladder temperature, esophageal temperature, etc., and it is difficult to carry out these measurements in daily life. Therefore, as a method of estimating the core body temperature, a method of simply estimating the core body temperature from the heart rate of the person to be measured and the air temperature of the atmosphere has been proposed (see Patent Document 1).

However, the method disclosed in Patent Literature 1 has a problem that the accuracy of estimating core body temperature is low.

JP 2020-65823 A

“2019 (May to September) emergency transportation due to heatstroke”, Ministry of Internal Affairs and Communications, [searched March 31, 2020], <https://www.fdma.go.jp/disaster/heatstroke/items /heatstroke_geppou_2019.pdf＞ “Heat Stroke Treatment Guidelines 2015”, Japanese Association for Acute Medicine, 2015, [searched March 31, 2019], <https://www.mhlw.go.jp/file/06-Seisakujouhou-10800000- Iseikyoku/heatstroke2015.pdf＞

The present invention has been made to solve the above problems, and provides a core body temperature estimation device, a core body temperature estimation method, and a core body temperature estimation program capable of estimating the core body temperature of a person to be measured with higher accuracy than ever before. intended to

A core body temperature estimating device of the present invention includes a first measuring unit configured to measure the heart rate or pulse rate of a measurement subject, and a second measurement unit configured to measure the skin temperature of the measurement subject. and the heart rate or pulse rate of the measurement subject and the skin temperature of the measurement subject. and a temperature calculation unit configured to calculate the deep temperature of the person to be measured based on the heat quantity.

Further, in one configuration example of the core body temperature estimating device of the present invention, the first part is the trunk of the measurement subject, the second part is the extremities of the measurement subject, and the calorie calculation is performed. a calorific value calculation unit configured to calculate calorific value of each of the trunk and extremities due to exercise of the measurement subject based on the heart rate or pulse rate of the measurement subject; Based on the heart rate or pulse rate of the measurement subject, the skin temperature, and the deep temperature calculated immediately before by the temperature calculation unit, the distance between the deep part and the skin in each of the trunk and the extremities of the measurement subject a first heat exchange amount calculation unit configured to calculate the first heat exchange amount of the subject, the heart rate or pulse rate of the measurement subject, the skin temperature, and the deep temperature calculated immediately before by the temperature calculation unit calculated immediately before by a second heat exchange amount calculation unit configured to calculate a second heat exchange amount between the trunk and the extremities in the deep part of the measurement subject based on and a metabolic rate calculation unit configured to calculate the metabolic rates of the deep layers of the trunk and the deep layers of the extremities of the person to be measured based on the obtained deep temperature. be.

Further, in one configuration example of the core body temperature estimating device of the present invention, the second measuring unit measures the skin temperature of each of the trunk and the extremities, and the first heat exchange amount calculating unit measures the skin temperature of the first 2 Calculate a first heat exchange amount between the deep part and the skin in each of the trunk and the extremities of the measurement subject using the measurement results of the measurement unit, and the second heat exchange amount calculation unit The method is characterized in that a second heat exchange amount between the trunk and the extremities in the deep part of the person to be measured is calculated using the measurement results of two measurement units.
Further, in one configuration example of the core body temperature estimating device of the present invention, the heat amount calculation unit is configured to set a third heat exchange amount between outside air and the deep part of the measurement subject. It is characterized by further comprising a part.

In one configuration example of the apparatus for estimating core body temperature according to the present invention, the temperature calculator may calculate heat generation amounts Q _1,U and Q _1,L of the trunk and extremities of the measurement subject, First heat exchange amounts Q _4,U , Q _4,L between the deep part and the skin in the trunk and the extremities, respectively, and the second heat between the trunk and the extremities in the deep part of the measurement subject exchange amount Q ₅ , third heat exchange amount Q ₃ between the outside air and the deep part of the subject, metabolic rate Q _2,U in the deep layer of the trunk of the subject, metabolic rate Q ₂ , in the deep layer of the extremities _L , heat capacity WC _UC of the deep layer of the trunk of the subject, heat capacity WC _LC of the deep layer of the extremities, estimated value T _UC [t] of the temperature of the deep part of the trunk calculated immediately before, temperature of the deep layers of the extremities Based on the estimated value T _LC [t] of , calculate the estimated value T _UC [t + Δt] of the temperature of the deep layer of the trunk and the estimated value T _LC [t + Δt] of the temperature of the deep layer of the extremities at the time (t + Δt) It is characterized by

Further, the core body temperature estimation method of the present invention includes a first step of measuring the heart rate or pulse rate of a measurement subject, a second step of measuring the skin temperature of the measurement subject, and a heart rate of the measurement subject. Alternatively, a third step of calculating the amount of heat flowing into and out of the deep part and the skin of the first and second parts of the measurement subject based on the pulse rate and the skin temperature; and a fourth step of calculating the deep temperature of the person.
Further, a core body temperature estimating program of the present invention is characterized by causing a computer to execute each of the steps described above.

According to the present invention, not only the heart rate of the person to be measured but also the skin temperature of the person to be measured is measured, and the amount of heat flowing into and out of the deep parts and skin of the first and second parts of the person to be measured is calculated. Then, the core body temperature of the person to be measured is estimated from the calculated amount of heat, so the core body temperature can be estimated with higher accuracy than in the past.

FIG. 1 is a block diagram showing the configuration of a core body temperature estimation device according to an embodiment of the present invention. FIG. 2 is a diagram showing a two-part, two-layer model of the subject's body and the amount of heat flowing into and out of each part and each layer of the subject. FIG. 3 is a flow chart for explaining the operation of the core body temperature estimating device according to the embodiment of the present invention. FIG. 4 is a block diagram showing a configuration example of a computer that realizes a core body temperature estimation device according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the configuration of a core body temperature estimation device according to an embodiment of the present invention. The core body temperature estimating device includes a first measuring unit 1, a second measuring unit 2, a calorific value calculating unit 3, a metabolic rate calculating unit 4, and an exhaled transpiration amount setting unit 5 (third heat exchange amount setting unit). , a heat exchange amount calculator 6 (first heat exchange amount calculator), a heat exchange amount calculator 7 (second heat exchange amount calculator), and a temperature calculator 8 .
The calorific value calculator 3 , the metabolic rate calculator 4 , the respiratory transpiration rate setter 5 , the heat exchange rate calculator 6 , and the heat exchange rate calculator 7 constitute a heat rate calculator 9 .

The first measurement unit 1 measures the heart rate or pulse rate of the person to be measured. The first measurement unit 1 is composed of, for example, a wear-type or belt-type electrocardiograph that measures the electrocardiogram of the person to be measured, and a calculation unit that calculates the heart rate from the electrocardiogram measured by the electrocardiograph. . Alternatively, the first measurement unit 1 includes a wristwatch-type or earphone-type pulse wave meter that measures the pulse wave of the person to be measured, and a calculation unit that calculates the heart rate (pulse rate) from the pulse wave measured by the pulse wave meter. consists of

The second measuring unit 2 measures the skin temperature of the person to be measured. The second measuring unit 2 is composed of, for example, a thermometer. The second measuring section 2 may be a thermometer integrated with the first measuring section. Further, the second measuring unit 2 may be composed of a plurality of thermometers and configured to measure the skin temperature at a plurality of locations of the person to be measured.

In addition, the second measurement section 2 may be configured by an infrared thermography. Infrared thermography detects infrared radiant energy emitted from a person to be measured, converts it into apparent temperature, and measures it as image data showing temperature distribution. By configuring the second measurement unit with an infrared thermography, it is possible to measure the skin temperature of a predetermined region of the measurement subject.
The first measuring unit 1 and the second measuring unit 2 may be integrated measuring instruments or separate measuring instruments.

Based on the heart rate and skin temperature of the measurement subject, the calorie calculation unit 9 calculates the amount of heat flowing into and out of the deep parts of the trunk (first part) and extremities (second part) of the measurement subject and the skin. calculate.
The temperature calculator 8 calculates the deep temperature of the person to be measured based on the heat quantity calculated by the heat quantity calculator 9 .

[Method for Estimating Core Body Temperature: Method for Calculating Changes in Core Body Temperature at Each Time Step]
In the present invention, as shown in FIG. 2, the body of the person to be measured is composed of two parts, the trunk U and the extremities L, and the two parts of the trunk U and the extremities L are the deep layer C and the skin layer S, respectively. is considered to have two layers of That is, the body of the measurement subject is composed of a trunk deep layer UC, a trunk skin layer US, a limb deep layer LC, and a limb skin layer LS. The present invention, based on the acquired skin temperature and heart rate information, calculates the amount of heat that flows into and out of each part and layer of the measurement subject, which changes from time to time, and from the change in the heat amount, each of the measurement subjects Estimate the temperature change of each part and each layer.

In this embodiment, a method for calculating changes in core body temperature for each time step of acquiring sensor data will be described. In this embodiment, as described above, a calculation example is described in which the body of the person to be measured is considered to be composed of two parts, the trunk and the limbs, but the trunk is replaced with the upper body, The limbs may be replaced with the lower body. That is, the body of the person to be measured may be composed of arbitrary two parts, the first part and the second part.

Equations (1) and (2) show examples of equations for estimating the temperature change in the core deep layer UC and the temperature change in the extremities deep layer LC, respectively. T _UC [t] is the temperature [° C.] of the core deep layer UC at time t, and T _LC [t] is the temperature [° C.] of the extremity deep layer LC at time t.

Q _1,U is the calorific value [W] of the trunk U due to the exercise of the measurement subject, and Q _1,L is the calorific value [W] of the extremities L due to the exercise. Q _2,U is the metabolic rate [W] of the body trunk deep layer UC of the measurement subject, and Q _2,L is the metabolic rate [W] of the extremity deep layer LC. Q ₃ (third heat exchange amount) is the expiratory transpiration amount [W] of the subject. Q _{4 ,U} (first heat exchange amount) is the amount of heat exchange [W] between the deep part of the trunk U of the subject and the skin; It is the amount of heat exchange [W] between skins. Q ₅ (second heat exchange amount) is the heat exchange amount [W] between the trunk U and the extremities L in the deep part of the person to be measured.

WC _UC is the heat capacity [J/°C] of the core deep layer UC of the subject, and WC _LC is the heat capacity of the extremity deep layer LC [J/°C]. Δt is a calculation step time, and is set to 1 [s] or less, for example. Also, the average skin temperature T _sk [t] at time t is given by equation (3). The core body temperature T[t+Δt] at time t+Δt is given by equation (4).

sf_conf_US is the ratio [%] of the surface area of the trunk U to the entire body surface of the subject, and sf_conf_LS is the ratio [%] of the surface area of the extremities L to the entire body surface. The heat capacities WC _UC , WC _LC and the ratios sf_conf_US, sf_conf_LS are known values, respectively, and may be set as appropriate in the execution of calculations. T _US [t] is the temperature [° C.] of the trunk skin layer US at time t, and T _LS [t] is the temperature [° C.] of the limb skin layer LS at time t. T _US [t] and T _LS [t] are measured by the second measuring section 2 .

FIG. 3 is a flow chart for explaining the operation of the core body temperature estimating device of this embodiment. The first measurement unit 1 measures the heart rate of the person to be measured (step S100 in FIG. 3). The second measuring unit 2 measures the skin temperature of the person to be measured (step S101 in FIG. 3). At this time, the second measuring unit 2 measures the skin temperature at least at two points, the trunk U and the extremities L. As shown in FIG.

[Calculation of average skin temperature _Tsk ]
The temperature calculator 8 calculates the temperature T _US [t] [°C] of the trunk skin layer US and the temperature T _LS [t] [°C] of the limb skin layer LS measured by the second measurement unit 2. , the average skin temperature T _sk [t] at time t is calculated as shown in equation (3) (step S102 in FIG. 3).

[Calculation of calorific value Q ₁ due to exercise]
Next, based on the heart rate measured by the first measurement unit 1, the calorific value calculation unit 3 calculates the calorific value Q _1,U [W] in the deep layer of the trunk U due to the exercise of the measurement subject, The calorific value Q _1,L [W] in the deep layer of the extremities L is calculated by the equations (5) and (6) respectively (step S103 in FIG. 3).

Equations (5) and (6) are obtained from the document ““Exercise guidelines for health promotion 2006-For prevention of lifestyle-related diseases-”, Ministry of Health, Labor and Welfare, 2006, <https://www.mhlw.go. jp/shingi/2006/07/dl/s0719-3c.pdf>”. weight is the weight [kg] of the person to be measured, ex_conf_U is the ratio [%] of the muscle mass of the trunk U to the whole body of the person to be measured, and ex_conf_L is the ratio [%] of the muscle mass of the extremities L to the whole body. The weight weight and the ratios ex_conf_U and ex_conf_L are known values, and may be set according to the actual situation, and may be appropriately set in the execution of the calculation.

METs[t] represents the number of METs. The calorific value calculation unit 3 uses the heart rate HR [t] [bpm], the resting heart rate HR _rest , and the maximum heart rate HR _max at the time t acquired by the first measurement unit 1 to calculate Equation (7) or Equation METs[t] may be calculated by any one of the equations (8).

Equation (8) is disclosed in the document “JR Wicks, et al., “HR Index-A Simple Method for the Prediction of Oxygen Uptake”, Medicine and Science in Sports and Exercise, 2011”.
The resting heart rate HR _rest and the maximum heart rate HR _max may each be known values obtained from past measurements, and may be set as appropriate for actual calculations. Also, for METs[t] used in equations (5) and (6), not only the instantaneous value but also the time average value (for example, the average value for 6 minutes) may be used.

[Calculation of metabolic rate _Q2 ]
Next, the metabolic rate calculation unit 4 calculates the core body temperature UC of the measurement subject based on the estimated value T [t] [° C.] of the core body temperature at time t, which was calculated by the temperature calculation unit 8 before Δt. The metabolic rate Q _2,U [W] and the metabolic rate Q _2,L [W] in the deep layers of the extremities LC are calculated by the equations (9) and (10), respectively (step S104 in FIG. 3).

Formulas (9) and (10) are obtained from the document "Ronald J Spiegel, "A Review of Numerical Models for Predicting the Energy Deposition and Resultant Thermal Response of Humans Exposed to Electromagnetic Fields", IEEE Transactions on Microwave Theory and Techniques, Volume 32, Issue 8, 1984. A _skin is a constant related to metabolism, volume_US is the volume of the trunk skin layer US of the measurement subject [m ³ ], volume_LS is the volume of the extremity skin layer LS [m ³ ], and weight_U is the weight of the trunk U of the measurement subject. [kg], weight_L is the weight [kg] of the extremities L. The constant A _skin , the volumes volume_US and volume_LS, and the weights weight_U and weight_L are known values, and may be set as appropriate in the execution of the calculation, using values that are practical.

T[0] is the initial value when the core body temperature T[t] is calculated. In this embodiment, as the initial value T[0] of the core body temperature T[t], a realistic value such as an actual value measured by another temperature measuring device or a known value at general rest is used. In the initial calculation of the metabolic rate Q ₂ at time t=0, T[t]=T[0].
Also, the metabolic rate calculation unit 4 calculates M in the formulas (9) and (10) as in the formula (11).

Formula (11) is disclosed in the document “AA Ganpule, et al., “Interindividual variability in sleeping metabolic rate in Japanese subjects”, European Journal of Clinical Nutrition, volume 61, 2007”. weight_C is the deep weight [kg] of the measurement subject, height is the height [cm] of the measurement subject, and age is the age of the measurement subject. sexcoef is a constant that is 0.5473 when the measurement subject is male and 0.5473×2 when the measurement subject is female. activity_level is a physical activity level, and A _coef is a parameter for metabolic adjustment. The weight weight_C, height height, age age, constant sexcoef, activity_level, and parameter A _coef are known values, and may be set appropriately in the execution of the calculation, using values that match the actual situation.

As an example of setting activity_level, if the person to be measured spends most of his/her life in a sitting position and mainly engages in static activities, the activity_level may be set to about 1.5. If the person to be measured works mainly in a sitting position, but includes movement within the workplace, work in a standing position, customer service, etc., or includes any of commuting, shopping, housework, light sports, etc., Activity_level should be about 1.75. If the person to be measured is engaged in a job that requires a lot of movement or standing, or if he/she has a habit of active exercise in leisure such as sports, activity_level should be set to about 2.0. Thus, the activity_level may be appropriately set according to the exercise status of the person to be measured.

[Setting of expiratory transpiration _Q3 ]
Next, the exhaled transpiration setting unit 5 sets the exhaled transpiration Q ₃ [W] of the person to be measured according to the equation (12) (step S105 in FIG. 3). The expiratory transpiration amount Q ₃ [W] corresponds to the amount of heat exchange between the outside air and the deep part of the subject.

[Calculation of heat exchange amount Q ₄ between deep part and skin]
Next, the heat exchange amount calculation unit 6 calculates the heart rate HR [t] [bpm] measured by the first measurement unit 1 and the temperature T _US [ t] [°C], the temperature T _LS [t] [°C] of the limb skin layer LS, the average skin temperature T _sk [t] [°C] calculated by the temperature calculator 8, and the temperature calculated by the temperature calculator 8 before Δt Estimated temperature T _UC [t] [°C] of core deep layer UC, estimated temperature T _LC [t] [°C] of limb deep layer LC, and estimated core body temperature at time t Based on T [t] [°C], the amount of heat exchange Q _4,U [W] between the deep part of the trunk U of the measurement subject and the skin, and the amount of heat exchange Q ₄ between the deep part and the skin of the extremities L _{, L} [W] are calculated by the equations (13) and (14), respectively (step S106 in FIG. 3).

The ratios sf_conf_US and sf_conf_LS are as described above. hx is the heat exchange coefficient between the skin of the person to be measured and the deep part. The heat exchange amount calculation unit 6 can calculate the heat exchange coefficient hx by Equation (15).

min(X, Y) means to adopt the smaller one of X and Y. METs[t] is as described above. a, b, e, hx0, hx1, and hx_max are parameters related to heat exchange coefficients. The parameters a, b, e, hx0, hx1, and hx_max are known values, and may be set appropriately through experiments.

T _sk [0] is the initial value when calculating the average skin temperature T _sk [t]. In this embodiment, as the initial value T _UC [0] of the temperature of the core deep layer UC and the initial value T _LC [0] of the temperature of the extremity deep layer LC, measured values measured by another temperature measuring device or general Use realistic values, such as known resting values. In the first calculation of the heat exchange amount Q ₄ at time t=0, T _sk [t]=T _sk [0].

[Calculation of heat exchange amount Q ₅ between trunk and extremities]
Next, the heat exchange amount calculation unit 7 calculates the heart rate HR [t] [bpm] measured by the first measurement unit 1, the average skin temperature T _sk [t] [°C] calculated by the temperature calculation unit 8, and , the estimated temperature value T _UC [t] [°C] of the core deep layer UC at time t and the temperature T _LC [t] [°C] of the extremity deep layer LC at time t calculated by the temperature calculator 8 before Δt, and Based on the estimated core body temperature T [t] [° C.], the amount of heat exchange Q ₅ [W] between the trunk U and the extremities L in the deep part of the subject is calculated by equation (16) (Fig. 3 step S107).

hcc is the heat exchange coefficient between the trunk U and the extremities L in the deep part of the person to be measured. The heat exchange amount calculation unit 7 can calculate the heat exchange coefficient hcc by Equation (17).

f and hcc0 are parameters related to the heat exchange coefficient. The parameters f and hcc0 are known values, and may be set appropriately through experiments. hcc_T is the temperature contribution of the heat exchange coefficient hcc, and hcc_M is the METs contribution of the heat exchange coefficient hcc. The heat exchange amount calculation unit 7 can calculate the temperature contribution hcc_T of the heat exchange coefficient hcc by Equation (18).

hcc_Tmax is the specified upper limit of hcc_T. Further, the heat exchange amount calculation unit 7 can calculate the METs contribution hcc_M of the heat exchange coefficient hcc by using Equation (19).

hcc_Mmax is the specified upper limit of hcc_M. hcc1 is a parameter related to the heat exchange coefficient. The upper limit values hcc_Tmax, hcc_Mmax, and the parameter hcc1 are known values, and may be set appropriately through experiments. aveMETs[t] is the time average value of the METs number (for example, the average value for 6 minutes). Parameters a and b are as described above.

In this way, the calorific value calculator 3, the metabolic rate calculator 4, the exhaled transpiration rate setting unit 5, the heat exchange rate calculator 6, and the heat exchange rate calculator 7 calculate the respective heat amounts Q _1,U , Q _1,L , Q _2,U , Q2 _,L , _Q3 , Q4 _,U , Q4 _,L , and _Q5 can be calculated.

The temperature calculator 8 calculates an estimated value T _UC [t] [° _C ] of the temperature of the deep layer UC of the torso of the person to be measured at time t, , the metabolic rate Q _2,U [W] in the core deep layer UC, the expiratory transpiration rate Q ₃ [W], the heat exchange rate Q _4,U [W] between the deep region and the skin in the core U, and the deep region Based on the heat exchange amount Q ₅ [W] between the trunk U and the extremities L at the time, the estimated value T _UC [t + Δt] [°C] of the temperature of the trunk deep layer UC after Δt is calculated by the formula (1) Calculate (step S108 in FIG. 3).

The temperature calculator 8 calculates an estimated value T _LC [t] [°C] of the temperature of the deep layers LC of the limbs L of the measurement subject at time t, and the amount of heat generated Q _1,L [W] in the deep layers of the limbs L , the metabolic rate Q _2,L [W] of the limb deep layer LC, the heat exchange rate Q _4,L [W] between the deep part and the skin in the limb L, and the deep part between the trunk U and the limb L Based on the amount of heat exchange Q ₅ [W], an estimated value T _LC [t+Δt] [° C.] of the temperature of the extremity deep layer LC after Δt is calculated by Equation (2) (step S109 in FIG. 3).

Thus, temperature estimates T _UC [t+Δt] and T _LC [t+Δt] can be calculated sequentially.
Then, the temperature calculator 8 calculates the estimated value T[t+Δt][° C.] of the core body temperature after Δt using the equation (4) (step S110 in FIG. 3).

The core body temperature estimating apparatus performs the above steps S100 to S110 every cycle Δt. In the next calculation after Δt, T _UC [t + Δt], T _LC [t + Δt], and T [t + Δt] calculated in the previous calculation are used as T _UC [t], T _LC [t], and T [t], respectively. , steps S100 to S110 may be performed.

In this embodiment, not only the heart rate of the person to be measured but also the skin temperature of the person to be measured is measured, the amount of heat flowing into and out of each part and layer of the person to be measured is calculated, and the calculated amount of heat is used by the person to be measured. Since the core body temperature is estimated, it is possible to estimate the core body temperature with higher accuracy than before.

In addition, although the present embodiment describes the case of using the heart rate of the person to be measured, the pulse rate may be used instead of the heart rate.

The calorific value calculator 3, the metabolic rate calculator 4, the exhaled transpiration rate setter 5, the heat exchange rate calculator 6, the heat exchange rate calculator 7, and the temperature calculator 8 of this embodiment are CPU (Central Processing Unit). , a computer having a storage device and an interface, and a program that controls these hardware resources. A configuration example of this computer is shown in FIG.

The computer comprises a CPU 200 , a storage device 201 and an interface device (I/F) 202 . The I/F 202 is connected with the first measurement unit 1, the second measurement unit 2, and the like. In such a computer, a core body temperature estimation program for implementing the core body temperature estimation method of the present invention is stored in the storage device 201 . The CPU 200 executes the processing described in this embodiment according to the programs stored in the storage device 201 . It is also possible to provide the program through a network.

Further, the calorific value calculation unit 3, the metabolic amount calculation unit 4, the exhalation amount setting unit 5, the heat exchange amount calculation unit 6, the heat exchange amount calculation unit 7, and the temperature calculation unit 8 are distributed among a plurality of computer devices. can be

INDUSTRIAL APPLICABILITY The present invention can be applied to techniques for estimating core body temperature of the human body.

DESCRIPTION OF SYMBOLS 1... 1st measurement part 2... 2nd measurement part 3... Calorific value calculation part 4... Metabolic amount calculation part 5... Evaporation amount setting part 6, 7... Heat exchange amount calculation part 8... Temperature calculation Part 9: Calorie calculation part.

Claims (7)

a first measuring unit configured to measure the heart rate or pulse rate of the person to be measured;
a second measuring unit configured to measure the skin temperature of the measurement subject;
A calorie calculation configured to calculate an amount of heat flowing into and out of deep parts and skin of a first region and a second region of the measurement subject based on the measurement subject's heart rate or pulse rate and skin temperature. Department and
A core body temperature estimating device, comprising: a temperature calculator configured to calculate a core body temperature of the measurement subject based on the amount of heat. The core body temperature estimating device according to claim 1,
The first part is the trunk of the measurement subject,
The second part is the extremities of the measurement subject,
The heat quantity calculation unit
a calorific value calculation unit configured to calculate calorific value of each of the trunk and extremities due to exercise of the measurement subject based on the heart rate or pulse rate of the measurement subject;
Based on the heart rate or pulse rate of the measurement subject, the skin temperature, and the deep temperature calculated immediately before by the temperature calculation unit, the distance between the deep part and the skin in each of the trunk and the extremities of the measurement subject A first heat exchange amount calculation unit configured to calculate the first heat exchange amount of
Based on the heart rate or pulse rate of the measurement subject, the skin temperature, and the deep temperature calculated immediately before by the temperature calculation unit, a second heat between the trunk and the extremities in the deep part of the measurement subject a second heat exchange amount calculator configured to calculate an exchange amount;
a metabolic rate calculator configured to calculate the metabolic rates of the deep layers of the trunk and the deep layers of the extremities of the measurement subject based on the deep temperature calculated immediately before by the temperature calculator; A core body temperature estimation device comprising: The core body temperature estimating device according to claim 2,
The second measuring unit measures the skin temperature of each of the trunk and the extremities,
The first heat exchange amount calculation unit uses the measurement result of the second measurement unit to calculate a first heat exchange amount between the deep part and the skin in each of the trunk and the extremities of the measurement subject,
The second heat exchange amount calculation unit calculates a second heat exchange amount between the trunk and the extremities in the deep part of the measurement subject using the measurement result of the second measurement unit. Core body temperature estimator. The core body temperature estimating device according to claim 2 or 3,
The deep body temperature estimating apparatus, wherein the heat amount calculating unit further includes a third heat exchange amount setting unit configured to set a third heat exchange amount between the outside air and the deep part of the measurement subject. The core body temperature estimating device according to claim 4,
The temperature calculation unit
Heat generation amounts Q _1,U , Q _1,L of the trunk and extremities of the measurement subject, first heat exchange amounts between the deep part and the skin of the trunk and extremities of the measurement subject, respectively Q _4,U , Q _4,L , a second amount of heat exchange Q ₅ between the trunk and extremities in the deep part of the person to be measured, and a third amount of heat exchange Q between the outside air and the deep part of the person to be measured ₃ , the metabolic rate Q _2,U in the deep layers of the trunk of the measurement subject, the metabolic rate Q _2,L in the deep layers of the limbs, the heat capacity WC _UC of the deep layers of the limbs, the deep layers of the limbs Based on the heat capacity WC _LC , the estimated temperature value T _UC [t] of the core deep layer calculated immediately before, and the estimated temperature value T _LC [t] of the extremity deep layer,

A deep body temperature estimating device characterized by calculating an estimated value T _UC [t+Δt] of the temperature of the deep layer of the trunk and an estimated value T _LC [t+Δt] of the temperature of the deep layer of the extremities at time (t+Δt). a first step of measuring the heart rate or pulse rate of the person to be measured;
a second step of measuring the skin temperature of the measurement subject;
a third step of calculating the amount of heat flowing into and out of the first and second deep parts and the skin of the measurement subject based on the heart rate or pulse rate of the measurement subject and the skin temperature;
and a fourth step of calculating the core temperature of the person to be measured based on the amount of heat. 7. A deep body temperature estimating program that causes a computer to execute each step according to claim 6.

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