JP2013188259A - Skinfold thickness measuring apparatus and control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a skinfold thickness measuring apparatus capable of easily measuring a skinfold thickness of a subject by an inexpensive configuration.SOLUTION: A skinfold thickness measuring apparatus for measuring the thickness of subcutaneous fat of a subject includes a heat resistor 113 for which a first temperature sensor 111 is disposed on a surface on the side to be in contact with a body surface of the subject and a second temperature sensor 112 is disposed on a surface on the side facing the surface on the side to be in contact with the body surface. The skinfold thickness measuring apparatus calculates, using an inputted body temperature value of the subject as a core temperature, a proportionality coefficient in a heat flow model in which it is defined that a difference between the core temperature of the subject and a temperature measured by the first temperature sensor in the state of bringing the heat resistor into contact with the subject and a difference between the temperatures measured by the first and second temperature sensors are in a proportional relation, and estimates the thickness of the subcutaneous fat of the subject on the basis of the calculated proportionality coefficient.

Description

  The present invention relates to a subcutaneous fat thickness measuring apparatus that measures the thickness of subcutaneous fat of a subject and a control method thereof.

  Generally, a caliper is known as a device for measuring the thickness of subcutaneous fat (subcutaneous fat thickness). Caliper is inexpensive and requires less time for measurement. However, in the measurement using a caliper, since the thickness of subcutaneous fat is measured by actually pinching the skin, the measurement value varies depending on the force of pinching. For this reason, there is a problem that the measurement value is likely to vary due to variation in the degree of pinching by the measurer, and in measuring the subcutaneous fat thickness using a caliper, a certain degree of skill is required for the measurer who performs the measurement.

  Patent Document 1 describes an optical subcutaneous fat thickness measuring device that measures subcutaneous fat thickness using infrared light. According to such an optical subcutaneous fat thickness measuring apparatus, the skill level is not required for the measurer, and anyone can easily measure the subcutaneous fat thickness.

JP 2010-178799 A

  However, the optical subcutaneous fat thickness measuring device requires a light irradiating unit that irradiates light toward the surface of the living body and a light receiving unit that receives light propagating through the living body, which increases the cost of the device. End up.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a subcutaneous fat thickness measuring apparatus and a control method thereof capable of easily measuring the subcutaneous fat thickness of a subject with an inexpensive configuration. And

In order to achieve the above object, a subcutaneous fat thickness measurement apparatus according to an aspect of the present invention has the following configuration, for example. That is,
A measuring device for measuring the thickness of subcutaneous fat of a subject,
A thermal resistor in which a first temperature sensor is disposed on a surface of the subject that contacts the body surface, and a second temperature sensor is disposed on a surface opposite to the surface that contacts the body surface. When,
Input means for inputting a body temperature value of the subject;
Measured by the first and second temperature sensors, and the difference between the temperature measured by the first temperature sensor and the deep body temperature value of the subject in a state where the thermal resistor is in contact with the subject. A calculating means for calculating the proportionality coefficient in the heat flow model that is proportional to the temperature difference using the body temperature value input by the input means as the deep body temperature value;
Estimating means for estimating the thickness of subcutaneous fat of the subject based on the proportionality coefficient calculated by the calculating means.

  ADVANTAGE OF THE INVENTION According to this invention, the subcutaneous fat thickness measuring apparatus which can measure the subcutaneous fat thickness of a test object easily can be provided with an inexpensive structure.

The figure which shows the external appearance and use condition of the subcutaneous fat thickness measuring apparatus by embodiment. The figure explaining the structure of a sensor unit. The figure which expressed the heat flow model by an embodiment using the electric circuit similarity method. The block diagram which shows the control structural example of a measurement unit. The flowchart explaining operation | movement of the measurement unit by embodiment. The figure which shows the structural example of the subcutaneous fat thickness measuring apparatus by other embodiment. The flowchart explaining operation | movement of the subcutaneous fat thickness measuring apparatus by other embodiment. The flowchart explaining operation | movement of the subcutaneous fat thickness measuring apparatus by other embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[First Embodiment]
1. Appearance Configuration of Subcutaneous Fat Thickness Measurement Device FIG. 1 shows an appearance of a sensor unit constituting the subcutaneous fat thickness measurement device according to the present embodiment. As shown in FIG. 1A, the sensor unit 10 includes a measurement unit 11 having a temperature sensor and a control circuit, and a mounting unit 14 for mounting the measurement unit 11 on a subject. The mounting unit 14 includes a heat insulating member 12 and a fixing member 13 for removably fixing the measurement unit 11 to the heat insulating member 12. FIG. 1B shows a usage state of the subcutaneous fat thickness measuring apparatus according to the embodiment. The sensor unit 10 is mounted on the body surface of the subject and communicates with an external electronic device 300. The heat insulating member 12 of the sensor unit 10 has flexibility, and an adhesive tape is provided on the surface of the mounting unit 14 that comes into contact with the subject as will be described later, thereby improving the adhesion of the sensor unit 10 to the subject. It is increasing.

  In FIG. 1B, the electronic device 300 can wirelessly communicate with the sensor unit 10, and acquires an estimated value of subcutaneous fat thickness from the sensor unit 10 via wireless communication. Electronic device 300 displays the acquired estimated value of subcutaneous fat thickness on display 350, for example. As will be described later, the electronic device 300 includes an input unit 303 for inputting a body temperature value to the sensor unit 10 or instructing the sensor unit 10 to start measuring subcutaneous fat thickness. These body temperature values and measurement start instructions are transmitted from the electronic device 300 by wireless communication and received by the sensor unit 10.

2. FIG. 2 is a diagram illustrating an example of a cross-sectional configuration of the sensor unit 10 according to the present embodiment. FIG. 2A shows a state where the measurement unit 11 and the mounting unit 14 are separated, and FIG. 2B shows a state where the measurement unit 11 is fixed to the mounting unit 14. In the measurement unit 11, the first temperature sensor 111 is positioned on the side in contact with the body surface when the first temperature sensor 111 is attached to the body surface of the subject, and the second temperature sensor 112 faces the first temperature sensor 111. It is arranged on the side to do. In addition, the 1st temperature sensor 111 and the 2nd temperature sensor 112 shall be comprised by the thermocouple or thermistor, for example.

  The thermal resistor 113 is disposed between the first temperature sensor 111 and the second temperature sensor 112, and allows the heat flow from the body surface of the subject to pass therethrough. The thermal resistor 113 is made of polyacetal, which is a non-foaming material having a thermal conductivity of 0.25 W / mK, for example. In addition, the shape of the thermal resistor 113 is cylindrical in FIG. 1, but is not limited to this, and may be a prismatic shape such as a quadrilateral cross section. Moreover, it is preferable that the first temperature sensor 111 and the second temperature sensor 112 are respectively disposed at the center positions of the upper surface and the lower surface of the thermal resistor 113.

  A uniformizing member 114 made of aluminum having a thermal conductivity of 236 W / mK is disposed on the upper surface of the thermal resistor 113 and covers the entire upper surface of the thermal resistor 113. Thereby, the temperature of the upper surface of the thermal resistor 113 (that is, the outside air side where the heat flow is dissipated) is made uniform. Further, by directing the direction of the heat flow passing through the thermal resistor 113 in a direction substantially perpendicular to the body surface, it is possible to indirectly suppress the dissipation of the heat flow from the side surface of the thermal resistor 113. Furthermore, a heat conductive member 115 having good heat conductivity such as an aluminum tape is provided on the bottom surface of the thermal resistor 113 so as to cover the bottom surface.

  The housing 116 is a holding member for integrally holding the components included in the measurement unit 11. Inside the housing 116, a circuit board 200 on which a control circuit described later is mounted is provided. The measurement unit 11 integrated by the housing 116 is detachable from the mounting unit 14 via the fixing member 13. According to such a configuration, the mounting unit 14 can be made disposable and the measurement unit 11 can be reused.

  The mounting unit 14 has a function of detachably fixing the sensor unit 10 on the body surface. The entire body surface side of the mounting unit 14 is covered with an adhesive tape 141 having an adhesive layer and a release paper 142. Therefore, when the sensor unit 10 is attached to the subject, the sensor unit 10 can be attached to the body surface of the subject by removing the release paper 142 and exposing the attaching tape 141. As a result, when the sensor unit 10 is mounted, the sensor unit 10 can be brought into close contact with the body surface of the subject.

  In the sensor unit 10 according to the present embodiment as described above, the heat insulating member 12 is in close contact with the body surface, so that heat flow is dissipated from the body surface around the thermal resistor 113 to the first temperature sensor 111. The influence can be suppressed. That is, the influence of disturbance (external air temperature, etc.) on the first temperature sensor 111 that measures the temperature of the body surface is effectively reduced. Moreover, since the housing 116 covers the side surface of the thermal resistor 113 and the heat flow is promoted by the uniformizing member 114 and the heat conducting member 115 as described above, the heat flow from the side surface of the thermal resistor 113 is reduced. Is done. According to such a configuration, a heat flow model as described below can be applied even when the sensor unit 10 is mounted on the body surface of the subject.

3. Heat Flow Model and Subcutaneous Fat Thickness Measurement Principle in Sensor Unit 10 FIG. 3 is a diagram for explaining a heat flow model used in this embodiment. In the present embodiment, the difference between the deep body temperature Tb of the subject and the temperature value Tt measured by the first temperature sensor 111 is the temperature value Tt measured by the first temperature sensor 111 and the second temperature sensor 112, Assume a heat flow model proportional to the difference in Ta.

That is, in the heat flow model of the present embodiment, it is assumed that the heat flow I flowing through the heat resistance Rt in the body and the heat flow I flowing through the heat resistance Ra of the heat resistor 113 are equal, and the equation shown in the following equation (1) It shall be upright.

When the equation (1) is modified, a relationship in which Tb-Tt is proportional to Tt-Ta is obtained as in the following equation (2).

Therefore, in the present embodiment, it is assumed that the deep body temperature Tb in the above equation is a value obtained by measuring the body temperature, for example, under armpit. Then, by substituting the temperature value Tt obtained from the first temperature sensor 111 and the temperature value Ta obtained from the second temperature sensor 112 at the time into the equation (2), Rt / Ra which is a proportional coefficient is obtained. Is obtained. In general, there is a correlation between the thermal resistance value Rt in the body of the subject and the subcutaneous fat thickness. The thermal resistance value Ra is a fixed value determined by the thermal resistor 113. Therefore, if the relationship between the proportional coefficient Rt / Ra (or the internal body heat resistance value Rt) and the subcutaneous fat thickness is obtained by measuring the subcutaneous fat thickness for a large number of subjects in advance, this table is referred to. Thus, the subcutaneous fat thickness can be estimated from the proportionality coefficient. Hereinafter, this table is referred to as a subcutaneous fat thickness table. In the present embodiment, the subcutaneous fat thickness is estimated by the following procedure.
The temperature value obtained from the first temperature sensor 111 is Tt, the temperature value obtained from the second temperature sensor 112 is Ta, and the body temperature value inputted from the outside (body temperature measured under armpit in this embodiment) ) As Tb to calculate the proportionality factor (Rt / Ra)
Referring to the subcutaneous fat thickness table, the subcutaneous fat thickness is estimated from the calculated proportionality coefficient.

  In addition, the body temperature value of the armpit is used as the body temperature value used for the measurement of subcutaneous fat thickness, but is not limited thereto. For example, body temperature measured under the tongue, body temperature measured with the ear (tympanic membrane), rectal temperature, or the like may be used. However, it is preferable that the body temperature measurement position when creating the subcutaneous fat thickness table is the same as the body temperature measurement position when measuring the subcutaneous fat thickness. For example, when the subcutaneous fat thickness table is generated using the body temperature measured under the armpit, it is preferable to use the body temperature value measured under the armpit as the deep body temperature Tb even when measuring the subcutaneous fat thickness.

4). Control Configuration of Sensor Unit 10 According to Embodiment FIG. 4A is a block diagram illustrating a control configuration example of the sensor unit 10 according to the embodiment. A control circuit for realizing the control configuration shown in FIG. 4A is mounted on the circuit board 200. 4A, the controller 201 has a CPU and a ROM (not shown), and the CPU implements various controls in the sensor unit 10 by executing a program stored in the ROM. The A / D converter 202 digitizes an electrical signal corresponding to the temperature of the first temperature sensor 111 and provides it to the controller 201. Similarly, the A / D converter 203 digitizes an electrical signal corresponding to the temperature of the second temperature sensor 112 and provides it to the controller 201. Therefore, the controller 201 can acquire the temperature value by reading the values of the A / D converter 202 and the A / D converter 203.

  For example, the wireless communication unit 204 performs short-range wireless communication (proximity wireless communication) with the external electronic device 300, receives a body temperature value, and transmits a subcutaneous fat thickness estimation result. The memory 206 is a memory from which data can be read and written by the controller 201. The memory 206 holds a body temperature value 211 received from the outside for measuring the subcutaneous fat thickness, the subcutaneous fat thickness table 212 described above, and the estimated subcutaneous fat thickness value 213. The battery 207 provides necessary power to each part of the control configuration described above. In this example, a table showing the relationship between the proportionality coefficient (Rt / Ra) and the subcutaneous fat thickness is used as the subcutaneous fat thickness table 212 (see FIG. 4B). The subcutaneous fat thickness table 212 is obtained by associating the subcutaneous fat thickness measured from a number of samples with the proportional coefficient at that time.

5. Operation of Sensor Unit 10 According to Embodiment FIG. 5 is a flowchart illustrating processing executed by the controller 201. When the controller 201 receives a body temperature value from the electronic device 300 via the wireless communication unit 204, the controller 201 stores it in the memory 206 as a body temperature value 211. In the sensor unit 10 of this example, it is assumed that the subcutaneous fat thickness is estimated in response to receiving the body temperature value from the electronic device 300 and the result is transmitted to the electronic device 300. The external electronic device 300 may be an electronic device including a communication interface corresponding to the wireless communication unit 204, such as a mobile phone, a smartphone, a mobile terminal, a personal computer, or the like. However, in the electronic device 300, an application for transmitting a body temperature value to the sensor unit 10 and receiving an estimated value of subcutaneous fat thickness from the sensor unit 10 needs to be running. Moreover, Bluetooth, infrared communication, etc. are mentioned as near field communication. Furthermore, it is not limited to wireless communication, but may be a wired communication form. Alternatively, an electronic thermometer capable of transmitting a body temperature value by wireless communication and receiving and displaying an estimated value of subcutaneous fat thickness may be prepared and used as the electronic device 300.

  In step S <b> 501, the controller 201 determines whether a body temperature value has been received via the wireless communication unit 204. If the controller 201 determines that the body temperature value has been received, the process proceeds to step S502. In step S <b> 502, the controller 201 reads the output values of the A / D converters 202 and 203 at that time, thereby acquiring the measurement value of the first temperature sensor 111 and the measurement value of the second temperature sensor 112. In step S503, the controller 201 sets the measured value of the first temperature sensor 111 as Tt, the measured value of the second temperature sensor 112 as Ta, and the body temperature value 211 held in the memory 206 as the deep body temperature Tb. Rt / Ra which is a proportional coefficient is calculated from the relationship of the above-described formula (2). In step S504, the controller 201 determines (estimates) the subcutaneous fat thickness from the proportionality coefficient calculated in step S503 by referring to the subcutaneous fat thickness table 212. In step S505, the controller 201 transmits the subcutaneous fat thickness estimated in step S504 to the electronic apparatus 300 via the wireless communication unit 204. Thereafter, the process returns to step S501.

  If the sensor unit 10 as described above is used, the electronic device 300 can receive the estimated value of the subcutaneous fat thickness from the sensor unit 10 by notifying the sensor unit 10 of the body temperature value. For example, in the configuration shown in FIG. 1B, when the user inputs a body temperature value using the input unit 303 (for example, a numeric keypad) of the electronic device 300 and presses a transmission button (for example, the * key), the electronic device 300 is The temperature value is notified to the sensor unit 10. In response to the notification of the body temperature value, the sensor unit 10 acquires and transmits an estimated value of the subcutaneous fat thickness, and the electronic device 300 receives the estimated value and displays it on the display 350. As described above, the sensor unit 10 includes a thermal resistor, a temperature sensor, and a control circuit, and a disposable part (such as the adhesive tape 141) of the sensor unit 10 is very inexpensive. The cost can be reduced compared to an infrared subcutaneous fat thickness measuring device. Note that the processing by the sensor unit 10 can be reduced by causing the electronic device 300 to execute the subcutaneous fat thickness table and the calculation of the proportionality coefficient, so that the sensor unit 10 can be configured at a lower cost. In the following other embodiments, such a configuration will be described.

[Other Embodiments]
In the first embodiment, the configuration in which the control circuit included in the measurement unit 11 performs the estimation up to the subcutaneous fat thickness is shown, but the subcutaneous fat thickness measuring apparatus of the present invention is not limited to such a form. For example, the sensor unit 10 may have a function of transmitting the measured temperatures (Ta, Tt) to the electronic device 300, and the subcutaneous fat thickness may be estimated by the electronic device 300 separate from the sensor unit 10. . Hereinafter, an example and operation of such a system will be described with reference to FIGS.

  First, a configuration example and operation of a subcutaneous fat thickness measurement apparatus according to another embodiment will be described with reference to FIGS. As illustrated in FIG. 6A, the communication unit 221, the CPU 222, and the memory 223 are mounted on the circuit board 200 of the measurement unit 11. The CPU 222 implements the following processing by executing a program stored in the memory 304. First, when the CPU 222 receives a temperature measurement instruction from the electronic device 300 via the communication unit 221 (step S701), the CPU 222 obtains measurement values (Ta, Tt) from the first temperature sensor 111 and the second temperature sensor 112. (Step S702). And the acquired measured value is transmitted to the electronic device 300 with the thermal resistance value Ra224 memorize | stored in the memory 223 (step S703).

  In the electronic apparatus 300, the CPU 302 executes the program stored in the memory 304, thereby realizing the following processing. The CPU 302 waits for a subcutaneous fat thickness measurement instruction or body temperature data to be input from the input unit 303 (steps S711 and S717). When a subcutaneous fat thickness measurement instruction is input, the CPU 302 transmits a temperature measurement instruction to the sensor unit 10 via the communication unit 301 (steps S711 and S712). When the CPU 302 receives the measured values Ta and Tt and the thermal resistance value Ra 224 from the sensor unit 10 via the communication unit 301 according to the temperature measurement instruction (step S713), the CPU 302 obtains the body temperature value 306 from the memory 304 and the deep body temperature Tb. (Step S714). Then, the CPU 302 calculates the proportionality coefficient (Rt / Ra) from these Ta, Tt, and Tb by using the equation (2), and further divides this by the thermal resistance value Ra224, whereby the thermal resistance value in the subject is calculated. Rt is calculated (step S715). The subcutaneous fat thickness table 305 held in the memory 304 is a table showing the relationship between the thermal resistance value Rt in the subject and the subcutaneous fat thickness. Therefore, the CPU 302 estimates the subcutaneous fat thickness by referring to the subcutaneous fat thickness table 305 from the thermal resistance value Rt calculated in step S715 (step S716). The estimated subcutaneous fat thickness is displayed on the display 350, for example.

  In the electronic apparatus 300, when a body temperature value is input via the input unit 303, the CPU 302 stores the input body temperature value in the memory 304 (steps S717 and S718). This body temperature value is the body temperature value 306 that is read out as the deep body temperature Tb in step S714 described above.

  According to the above configuration, the thermal resistance value Ra 224 of the thermal resistor 113 of the measurement unit 11 is transmitted from the sensor unit 10. For this reason, the electronic device 300 can estimate the subcutaneous fat thickness stably even if the measurement unit 11 is changed, that is, even if the measurement unit 11 having a different thermal resistance value is used.

  Furthermore, another example of the configuration and operation of the subcutaneous fat thickness measuring apparatus will be described with reference to FIGS. 6B and 8. In the configuration of FIG. 6A, the measurement unit 11 transmits the thermal resistance value Ra, so that the electronic device 300 can correspond to the plurality of measurement units 11. On the other hand, in the configuration of FIG. 6B, the measurement unit 11 notifies the electronic device 300 of the ID, so that the electronic device 300 can correspond to the plurality of measurement units 11.

  When the CPU 222 receives a temperature measurement instruction from the electronic device 300 via the communication unit 221 (step S801), the CPU 222 acquires measurement values (Ta, Tt) from the first temperature sensor 111 and the second temperature sensor 112 (step S801). S802). Then, the CPU 222 transmits the acquired measurement value together with the ID 225 stored in the memory 223 to the electronic device 300 (step S803). Here, ID225 is a value unique to each measurement unit.

  In electronic device 300, CPU 302 waits for input of subcutaneous fat thickness measurement instructions or body temperature data from input unit 303 (steps S811, S818). When the subcutaneous fat thickness measurement instruction is input, the CPU 302 transmits a temperature measurement instruction to the measurement unit 11 via the communication unit 301 (steps S811 and S812). When the CPU 302 receives the measurement values Ta and Tt and the ID 225 from the measurement unit 11 via the communication unit 301 according to the measurement instruction (step S813), the CPU 302 reads the body temperature value 306 from the memory 304 as the deep body temperature Tb (step S814). ). The CPU 302 calculates a proportionality coefficient (Rt / Ra) from Ta, Tt, and Tb (step S815), and further selects a subcutaneous fat thickness table corresponding to the received ID 225 from the table group held in the memory 304. (Step S816).

  As shown in FIG. 6 (b), the memory 304 of the electronic device 300 holds a subcutaneous fat thickness table (311 and 312) for each ID, and the CPU 302 holds corresponding to the received ID. Select the subcutaneous fat thickness table. In this example, a subcutaneous fat thickness table 311 corresponding to the measurement unit with ID “xyz” and a subcutaneous fat thickness table 312 corresponding to the measurement unit with ID “abc” are shown. If the ID received from the sensor unit 10 is “xyz”, for example, the subcutaneous fat thickness table 311 is selected in step S816. Then, the CPU 302 refers to the subcutaneous fat thickness table selected in step S815, and estimates the subcutaneous fat thickness from the proportional coefficient acquired in step S815 (step S817). The estimated subcutaneous fat thickness is displayed on the display 350, for example.

  In electronic device 300, when a body temperature value is input via input unit 303, CPU 302 stores the input body temperature value in memory 304 (steps S818 and S819). This body temperature value is the body temperature value 306 that is read out as the deep body temperature Tb in step S814 described above.

  According to the above configuration, since the ID 225 unique to the measurement unit 11 is notified from the measurement unit 11, the electronic device 300 can use the subcutaneous fat suitable for the measurement unit in use even if the measurement unit 11 is changed. A thickness table can be selected and used. Therefore, even when a plurality of measurement units are used, the subcutaneous fat thickness can be estimated stably. Note that the ID of the subcutaneous fat thickness table may be stored in the memory 223 of the measurement unit 11, and the subcutaneous fat thickness table having this ID may be acquired from the memory 304 in step S816.

  In the operations described with reference to FIGS. 7 and 8, the process of inputting the body temperature value and the measurement instruction are performed separately, but the input of the body temperature value may be used as the measurement instruction as it is. Note that various types of communication such as short-range wireless communication (for example, Bluetooth, infrared communication, RFID, etc.), wireless LAN, and wired communication can be used for communication by the communication unit 221 and the communication unit 301.

  In each of the above embodiments, polyacetal, which is a non-foaming material, is used as the material of the thermal resistor 113. However, the present invention is not limited to this, and any material having the same thermal conductivity may be used. For example, other materials may be used. For example, PC (polycarbonate: thermal conductivity = 0.193 W / mK), PP (polypropylene: thermal conductivity = 0.117 W / mK), PET (polyethylene terephthalate: thermal conductivity = 0.152 W / mK), PMMA ( Polymethyl methacrylate: thermal conductivity = 0.167 to 0.251 W / mK), ABS (acrylonitrile / butadiene / styrene copolymer: thermal conductivity = 0.193 to 0.360 W / mK), and the like. Moreover, in the said embodiment, although aluminum was used as a material of the equalization member 114 or the heat conductive member 115, this invention is not limited to this, The material with a thermal conductivity larger than the thermal resistor 113 is used. Other materials may be used if they exist.

DESCRIPTION OF SYMBOLS 10 ... Sensor unit, 11 ... Measuring unit, 12 ... Heat insulation member, 13 ... Fixing member, 14 ... Mounting unit, 111 ... 1st temperature sensor, 112 ... 2nd temperature sensor, 113 ... Thermal resistor, 114 ... Uniform 115, heat conduction member, 200 ... circuit board, 300: electronic device

Claims (7)

A measuring device for measuring the thickness of subcutaneous fat of a subject,
A thermal resistor in which a first temperature sensor is disposed on a surface of the subject that contacts the body surface, and a second temperature sensor is disposed on a surface opposite to the surface that contacts the body surface. When,
Input means for inputting a body temperature value of the subject;
The temperature measured by the first and second temperature sensors and the difference between the deep body temperature of the subject and the temperature measured by the first temperature sensor in a state where the thermal resistor is in contact with the subject. Calculating means for calculating a proportionality coefficient in the heat flow model that is proportional to the difference between the body temperature value input by the input means as the deep body temperature;
A subcutaneous fat thickness measuring apparatus comprising: estimation means for estimating the thickness of subcutaneous fat of the subject based on the proportionality coefficient calculated by the calculation means.   The calculation means acquires the temperature value measured by the first and second temperature sensors in response to the body temperature value input by the input means, and calculates the proportionality coefficient. The subcutaneous fat thickness measuring apparatus according to claim 1. A communication means for performing short-range wireless communication with an external electronic device;
The subcutaneous fat thickness measuring apparatus according to claim 1, wherein the input unit inputs the body temperature value via the communication unit.   The sensor unit having the thermal resistor and the electronic device including the input unit, the calculation unit, and the estimation unit are configured separately, and the sensor unit and the electronic device can communicate with each other. The subcutaneous fat thickness measuring apparatus according to any one of claims 1 to 3. A table storing the relationship between the proportionality coefficient of the heat flow model and the thickness of subcutaneous fat;
5. The subcutaneous means according to claim 1, wherein the estimating means estimates the thickness of subcutaneous fat from the proportionality coefficient calculated by the calculating means by referring to the table. Fat thickness measuring device. A table storing a relationship between a value obtained by dividing the proportionality coefficient of the heat flow model by the thermal resistance value of the thermal resistor and the thickness of subcutaneous fat;
The said estimation means estimates the thickness of subcutaneous fat from the value which remove | divided the proportionality coefficient calculated by the said calculation means by the said thermal resistance value with reference to the said table. The subcutaneous fat thickness measuring apparatus according to any one of the above. A thermal resistor in which a first temperature sensor is disposed on a surface of the subject that contacts the body surface, and a second temperature sensor is disposed on a surface opposite to the surface that contacts the body surface. A method of controlling a measuring device for measuring the thickness of subcutaneous fat of the subject,
An input step of inputting the body temperature value of the subject;
The temperature measured by the first and second temperature sensors and the difference between the deep body temperature of the subject and the temperature measured by the first temperature sensor in a state where the thermal resistor is in contact with the subject. A calculation step of calculating a proportionality coefficient in the heat flow model that is proportional to the difference between the body temperature value input in the input step as the deep body temperature,
An estimation step of estimating a thickness of subcutaneous fat of the subject based on the proportionality coefficient calculated in the calculation step.

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