JP6999301B2 - Biometric data measuring device - Google Patents

Description

The present invention relates to a biological data measuring device attached to the body surface of a living body to measure biological data, and more specifically to a biological data measuring device for measuring a particularly deep body temperature of a living body.

At present, as a method of measuring the core body temperature by attaching it to the body surface of a living body, for example, the Single Heat Flux (SHF) method, the Dual Heat Lux (DHF) method, and the Zero Heat Flux (ZHF) method are known. ing.

As an example of the Single Heat Flex (SHF) method, FIG. 13 shows the configuration of FIG. 2 described in Patent Document 1. In the figure, 2 is a first probe, 6 is a second probe, 4 is a heat insulating material, and 3 is a body surface. The heat flow (heat flux) generated substantially vertically from the body surface 3 by the first probe 2 and the second probe 6 is measured.

According to the SHF method, there is an advantage that the configuration is simple with low power because no heater is required, but there is a problem that the measurement time is about 10 minutes. In addition, it is necessary to measure the thermal resistance in the living body in advance by another method.

Next, as an example of the Dual Heat Flux (DHF) method, FIG. 14 shows the configuration of FIG. 1 described in Patent Document 2. In the figure, 11 and 17 are pairs of first temperature sensors, 12 and 18 are pairs of second temperature sensors, and heat flow measured by pairs 11 and 17 of first temperature sensors and pair 12 of first temperature sensors. , The core body temperature of the living body is measured by the heat flow measured by 18.

According to the DHF method, there is an advantage that the electric power is low because a heater is not required, and the core body temperature can be known without measuring the thermal resistance in the body by another method. However, the measurement time takes about 10 minutes. There is a problem that two pairs of temperature sensors are required.

Further, as an example of the Zero Heat Flux (ZHF) method, FIG. 15 shows FIG. 6 described in Patent Document 3. In the figure, 140 is a temperature sensor and 126 is a heater. According to the ZHF method, the temperature sensor 140 attached to the skin surface is heated by the heater 126, and when the temperature sensor 140 and the core body temperature reach equilibrium (about 3 minutes), the core body temperature is displayed on the display unit. ..

As described above, the ZHF method has the advantage that the measurement time is relatively fast, about 3 minutes, but on the other hand, there is a problem in that the power consumption of the heater is about 1 W (watt). ..

International Publication WO2011 / 012386 (especially Fig. 2) Japanese Unexamined Patent Publication No. 63-58223 (particularly FIG. 1) U.S. Patent Publication No. 2016/0238463 (particularly Figure 6)

Further, in the case of the ZHF method, since power consumption of about 1 W is required, it is difficult to apply it to a plaster-type sensor used by sticking it on the body surface.

Regarding the wiring around the sensor, there are 4 wirings even in the case of the SHF method and 8 wirings in the case of the DHF method, and it is necessary to connect these wirings to a signal reading circuit etc., which takes time and effort. ..

In addition, heat conduction in the horizontal direction (direction substantially parallel to the body surface) due to wiring causes a decrease in sensitivity and an error. Furthermore, since it is connected to the device on the data collection side via wiring, it takes time and effort to attach it to a living body, and it is a burden when it is attached.

Therefore, an object of the present invention is to provide a biological data measuring device having a simple structure and good wearability on the body surface of a living body, particularly capable of accurately measuring a core body temperature.

In order to solve the above problems, the biological data measuring device of the present invention is located at a position separated from the body surface by a predetermined distance via a support member so that an air layer is formed between the biological data measuring device and the body surface of the living body to be measured. A substrate to be arranged is provided, and the substrate is provided with a thermometer including a radiation thermometer for measuring the body surface temperature of the body surface and a substrate thermometer for measuring the substrate temperature of the substrate , and the support member is heat-insulated. It is made of a material, and a substantially sealed space as the air layer is formed between the radiation thermometer and the body surface, and the substrate is supported by the heat insulating material on the upper plate and the upper plate. It consists of a box body with an open bottom surface on the surface side of the body having side plates bent downward at a substantially right angle from the peripheral edge of the plate, and the entire bottom surface is covered with a sheet and the body of the sheet. The surface side is housed in a case coated with an adhesive gel, and the case is characterized in that a high thermal conductive film that transfers heat entering and exiting from the side plate side to the substrate is provided . ..

Further, the biometric data measuring device of the present invention has a substrate arranged at a position separated from the body surface by a predetermined distance via a support member so that an air layer is formed between the biometric data measuring device and the body surface of the living body to be measured. A body thermometer including a radiation thermometer for measuring the body surface temperature of the body surface and a substrate thermometer for measuring the substrate temperature of the substrate is provided on the substrate, and the support member is made of a heat insulating material and is described above. A substantially sealed space as the air layer is formed between the radiation thermometer and the body surface, and the substrate is supported by the heat insulating material and is directed upward from the bottom plate and the peripheral edge of the bottom plate. It is housed in a case having a box-shaped case body with an open upper surface including a side plate bent at a substantially right angle, and a lid that can be detachably covered on the upper surface of the case body. Is characterized by being provided with a high thermal conductive film that transfers heat entering and exiting from the side plate side to the substrate .

In the biometric data measuring apparatus of the present invention, the body surface temperature is Tsk, the substrate temperature is Tsub, the thermal resistance of the air layer is Rthir, and the heat flow substantially perpendicular to the body surface is Is (Tsk-Tsub) /. It is provided with a calculation unit for obtaining the heat flow Is by Rthir.

Further, the calculation unit obtains the deep body temperature Tcore by Tsk + Is × Rthbody, where the thermal resistance from the deep tissue of the living body to the body surface is Rthbody and the deep body temperature of the living body is Tcore.

The present invention also includes an embodiment in which the internal electrical resistance measuring means for measuring the electrical resistance in the living body is provided, and the thermal resistance Rthbody is estimated from the internal electrical resistance value measured by the internal electrical resistance measuring means.

Further, the biometric data measuring device according to another aspect of the present invention is, as the body thermometer, a first radiation thermometer for measuring the body surface temperature of the body surface and a first radiation thermometer for measuring the substrate temperature of the substrate on the substrate. A first thermometer including a substrate thermometer, a second radiation thermometer for measuring the body surface temperature of the body surface, and a second thermometer including a second substrate thermometer for measuring the substrate temperature of the substrate are juxtaposed. At the same time, the upper surface of the substrate on which the first thermometer is arranged is covered with a heat insulating material.

The biological data measuring device according to the other aspect has a calculation unit for obtaining the deep body temperature Tcore of the living body, and the body surface temperature measured by the first thermometer flows through Tsk1 and substantially perpendicular to the body surface. The above calculation is performed with the heat flow as Is1, the body surface temperature measured by the second thermometer as Tsk2, the heat flow flowing substantially perpendicular to the body surface as Is2, and the heat resistance from the deep tissue of the living body to the body surface as Rthbody. The unit is characterized in that after calculating Rthbody from (Tsk2-Tsk1) / (Its1-Its2), the core body temperature Tcore of the living body is obtained from (Its1 × Rthbody + Tsk1) or (Its2 × Rthbody + Tsk2).

According to the present invention, since the radiation thermometer and the substrate thermometer are provided on the substrate arranged at a position separated from the body surface by a predetermined distance via the support member (heat insulating material), it can be easily manufactured at low cost. can do. Further, since the heat insulating layer between the substrate and the body surface is an air layer, the thermal resistance between the substrate and the body surface can be made a large value.

Further, since a space (air layer) sealed by a heat insulating material as a support member is formed between the radiation thermometer and the body surface, an error with respect to the ambient temperature can be reduced.

In addition, by providing a transmitter that wirelessly transmits the body surface temperature measured by the radiation thermometer and the substrate temperature measured by the substrate thermometer, heat transfer through the wiring of the wired transmitter is carried out. It is possible to measure the core body temperature with higher accuracy.

In addition, a first thermometer including a first radiation thermometer for measuring the body surface temperature of the body surface and a first substrate thermometer for measuring the substrate temperature of the substrate, and a second radiation thermometer for measuring the body surface temperature of the body surface. A second thermometer including a second thermometer for measuring the substrate temperature of the substrate is juxtaposed on the substrate, and the upper surface of the substrate on which the first thermometer is arranged is covered with a heat insulating material. According to this, the core body temperature can be measured without measuring the thermal resistance in the body by a separate measuring means.

(A) A schematic plan view showing a basic aspect (first embodiment) of the present invention, (b) a schematic cross-sectional view thereof. (A) Schematic plan view and (b) sectional view which shows the 2nd Embodiment of this invention. (A) A schematic plan view and (b) a sectional view thereof show a third embodiment of the present invention. (A) Schematic plan view and (b) sectional view which shows the 4th Embodiment of this invention. (A) Schematic plan view and (b) sectional view thereof which show 5th Embodiment of this invention. A schematic plan view showing a sixth embodiment of the present invention, (b) a sectional view thereof, and (c) a sectional view according to a modified example of the fifth embodiment. (A) Schematic diagram and (b) sectional view of a main part thereof showing a state in which the biological data measuring device of the present invention is attached to a living body via a belt. (A) A schematic plan view and (b) a sectional view thereof show the seventh embodiment of the present invention. Schematic cross-sectional view showing the eighth embodiment of the present invention. In the first to fourth embodiments of the present invention, (a) a graph showing a temperature gradient from a deep part of the body to an environmental temperature in winter, and (b) thermal resistance, thickness, and thermal resistance of each part in winter are shown. Table to show. In the embodiments of the first to fourth embodiments, (a) a graph showing a temperature gradient from a deep part of the body to an environmental temperature in the summer, and (b) a table showing the thermal resistivity, thickness, and thermal resistance of each part in the summer. .. In the aspect of the fifth embodiment, the graph showing the temperature gradient from the deep part of the body to the environmental temperature measured by the first thermometer and the second thermometer, (b) the thermal resistance and thickness of each part at that time, A table showing thermal resistance. The schematic diagram which introduces the SHF method as a 1st prior art. The schematic diagram which introduces the DHF method as a 2nd prior art. The schematic diagram which introduces the ZHF method as the 3rd prior art.

Next, some embodiments according to the present invention will be described with reference to FIGS. 1 to 11, but the present invention is not limited to these embodiments.

First, referring to FIG. 1, the biological data measuring device 1 of the present invention includes a substrate 10 provided with a thermometer 20 as a basic embodiment (first embodiment). The substrate 10 is arranged at a position separated from the body surface BS of the living body to be measured by a predetermined distance (for example, a position separated by about 3 mm from the body surface BS) via a support member described later.

For the substrate 10, for example, a polyimide substrate is used. It is preferable to reduce the heat capacity by setting the thickness to about several hundred microns. Further, the substrate 10 is preferably in the shape of a quadrangle of 30 mm square or more, but may be a circle having substantially the same area or a polygon other than the quadrangle.

Although not shown in detail, the thermometer 20 includes a radiation thermometer 21 for measuring the temperature Tsk of the body surface BS and a substrate thermometer 22 for measuring the substrate temperature Tsub of the substrate 10. The radiation thermometer 21 is arranged on the lower surface side of the substrate 10 so as to face the body surface BS. A hole may be made in the substrate 10 and a radiation thermometer 21 may be mounted in the hole.

A bolometer detector, a thermopile detector, or the like is used for the radiation thermometer 21, and the amount of radiated infrared rays of the body surface BS is measured. The substrate thermometer 22 is a thermometer for measuring the substrate temperature Tsub of the substrate 10, and may be provided separately from the radiation thermometer 21, but a calibration thermometer provided in the radiation thermometer 21 can be used.

With the thermal resistance of the air layer A between the substrate 10 and the body surface BS as Rthir, the heat flow (heat flux) Is that flows substantially perpendicular to the body surface BS can be obtained from Is = (Tsk-Tsub) / Rthir. .. By using the air layer A, the thermal resistance Rth between the substrate 10 and the body surface BS can be made a large value.

Here, the deep body temperature of the living body is Tcore, the thermal resistance from the deep tissue of the living body to the body surface BS is Rthbody, and the deep body temperature Tcore can be obtained from Tcore = Tsk + Is × Rthbody.

In this embodiment, the thermal resistance Rthbody in the body is measured by another method (not shown). As an example of the method, a weak current (for example, about 0.2 μA) is passed through a pair of electrodes to the living body to measure the electric resistance (GSR: Galvanic Skin Resistance) in the living body. There is a method of estimating the thermal resistance Rthbody from the electric resistance value. The present invention also includes an embodiment including the means for measuring the electrical resistance in the body.

Next, with reference to FIG. 2, the biological data measuring device 1 according to the second embodiment includes a support member 30 that supports the substrate 10 at a predetermined height position on the body surface BS. As the support member 30, a heat insulating material 31, such as a foamed plastic material, which has a large thermal resistance Rth as much as possible and is not easily deformed by an external force is preferably adopted.

Examples of this type of foamed plastic material include polyurethane and polystyrene. Some rigid urethane foams made of polyurethane have a thermal resistance of 40 m · K / W in the static atmosphere. The compressive strength can be several hundred gf / cm ² to 1 kgf / cm ² .

In this embodiment, the support member 30 (heat insulating material 31) forms a substantially sealed space as an air layer A between the radiation thermometer 21 and the body surface BS when mounted on the body surface BS, and other than that. It is formed so as to cover the substrate surface including the upper surface of the above.

Next, in the third embodiment shown in FIG. 3, the biological data measuring device 1 includes a case 40 for reducing the lateral escape of the heat flow Is from the body surface BS. The case 40 is a box body having an open bottom surface (body surface BS side surface) having an upper plate (top plate) 401 and a side plate 402 bent downward at a substantially right angle from the peripheral edge of the upper plate 401. , The substrate 10 is housed inside the substrate 10 in a state of being supported by the heat insulating material 31.

On the other hand, in this third embodiment, the substrate 10 is provided with a transmission unit 24 and a calculation unit 25. As an example, the calculation unit 25 uses the body surface temperature Tsk measured by the radiation thermometer 21, the substrate temperature Tsub measured by the substrate thermometer 22, and the heat resistance Rthir of the air layer A to generate heat flow Is and the like. calculate. The transmission unit 24 wirelessly transmits the calculated calculated value or the like to a data collection / analysis device as a master unit (not shown).

A wireless module or the like is used for the transmission unit 24, and a microcomputer or the like is used for the calculation unit 25. These modules and packages contain heat-generating components, and the heat generation (in many cases, a slight heat generation) is deep. If an error is given in the measurement of body temperature, the transmission unit 24 and / or the calculation unit 25 can be arranged outside the case 40 as one of the countermeasures.

As another method, a high heat conductive material for improving heat conduction between the transmission unit 24 and / or the calculation unit 25 and the body surface BS is provided on the air layer A (for example, the lower surface of the substrate 10), and the transmission unit 24 and / or the calculation is performed. The heat generated by the portion 25 can be released to the body surface BS.

Further, a method of arranging the transmission unit 24 and / or the calculation unit 25 on the upper surface of the substrate 10 to release the heat generation to the atmosphere, and heat insulation between the transmission unit 24 and / or the calculation unit 25 and the thermometer 20. There is also a method of interposing means.

As another embodiment, the calculation unit 25 is provided on the master unit (data collection / analysis device) side, and the body surface temperature Tsk, the substrate temperature Tsub, etc. are transmitted from the transmission unit 24 to the master unit, and the master unit side. The heat flow Is, the core body temperature Tcore, and the like may be obtained, and such an embodiment is also included in the present invention.

The case 40 is preferably made of a material capable of reducing the temperature distribution in the horizontal direction and transmitting the radio wave (electromagnetic wave) of the transmitting unit 24, and examples of the material corresponding to this include alumina. Incidentally, the thermal resistance of alumina is 0.03 m · K / W.

A patterned printed circuit board can also be used instead of alumina. In this case, the conductor (copper foil) of the specific portion 40a (the upper right corner portion in FIG. 3A) corresponding to the communication antenna of the transmission unit 24 is deleted so that the radio can pass therethrough. The side surface 40b of the case 40 may be made of metal.

2.4 GHz or 13.56 MHz (Industry-Science-Medical band) can be used for the transmitter 24. Although not shown, a battery (preferably a secondary battery) that supplies power to the transmission unit 24 and the calculation unit 25 is mounted on the board 10, but even if power is sent from the master unit side at 13.56 MHz. good.

In the fourth embodiment shown in FIG. 4, tubular heat insulating materials 311, 312 are used as the support member 30. The heat insulating materials 311, 312 are arranged concentrically, with the heat insulating material 311 on the inside and the heat insulating material 312 on the outside.

In the fourth embodiment, the inner heat insulating material 311 of the substrate 10 forms a closed space (air layer A) between the radiation thermometer 21 and the body surface BS when mounted on the body surface BS. It includes a cylindrical lower heat insulating material 311a provided on the lower surface side, and an upper heat insulating material 311b arranged between the upper surface of the substrate 10 and the inner surface of the case 40.

The outer heat insulating material 312 is a support member that supports the outer peripheral side of the substrate 10, and is arranged between the cylindrical lower heat insulating material 312a provided on the lower surface side of the substrate 10 and the upper surface of the substrate 10 and the inner surface of the case 40. It is provided with an upper heat insulating material 312b.

In the fourth embodiment, the upper heat insulating material 311b and the lower heat insulating material 311a contained in the inner heat insulating material 311 have the same diameter, but may have different diameters. Similarly, the upper heat insulating material 312b and the lower heat insulating material 312a included in the outer heat insulating material 312 have the same diameter, but may have different diameters.

In this fourth embodiment, the heat insulating materials 311, 312 have a cylindrical shape, but may have a square tubular shape. In general, when the compressive strength of the heat insulating material is increased, the thermal resistance rate decreases. Therefore, the thermal resistance can be increased by forming the heat insulating material into a cylindrical shape as described above. For example, policerol has a thermal resistance of 8 m · K / W and is strong but has a slightly low thermal resistance, so it is partially used.

Next, with reference to FIG. 5, the biological data measuring device 1 according to the fifth embodiment includes two first and second thermometers 20a and 20b. Both the thermometers 20a and 20b include a radiation thermometer 21 and a substrate thermometer 22.

With the provision of the two thermometers 20a and 20b, two substrates 10a and 10b are used as the mounting substrate 10. A first thermometer 20a is provided on one substrate 10a, and a second thermometer 20b is provided on the other substrate 10b. In this embodiment, both the transmission unit 24 and the calculation unit 25 are arranged on one of the boards 10a side.

The substrate 10a and the substrate 10b are connected by the flexible substrate 11, and the second thermometer 20b is connected to the transmission unit 24 and / or the calculation unit 25 via the wiring in the flexible substrate 11. As another aspect, the thermometers 20a and 20b may be juxtaposed on the same substrate 10.

The difference between the thermometers 20a and 20b is that, as shown in FIG. 5B, one thermometer, in this embodiment, the heat insulating material 313 is arranged above the first thermometer 20a, and the second thermometer 20b side. The point above is a space.

The calculation unit 25 obtains the core body temperature Tcore of the living body as follows based on the body surface temperature Tsk and the substrate temperature Tsub measured by the thermometers 20a and 20b.

That is, the body surface temperature measured by the first thermometer 20a is Tsk1, the heat flow flowing almost perpendicular to the body surface BS is Is1, the body surface temperature measured by the second thermometer 20b is Tsk2, and the body surface temperature is almost perpendicular to the body surface BS. With the heat flow flowing through the body as Is2 and the heat resistance from the deep tissue of the living body to the body surface BS as Rthbody, the calculation unit 25 calculates Rthbody from (Tsk2-Tsk1) / (Ith1-Its2) and then (Th1 × Rthbody + Tsk1). Alternatively, the core body temperature Tcore of the living body is obtained by (Its2 × Rthbody + Tsk2).

Incidentally, the substrate temperature measured by the substrate thermometer 22 of the first body thermometer 20a is Tsub1, the substrate temperature measured by the substrate thermometer 22 of the second body thermometer 20b is Tsub2, and the thermal resistance of the air layer A is Rthir. As described above, the heat flow Is1 is obtained from Is1 = (Tsk1-Tsub1) / Rthir, and is obtained by the heat flow Is2 = (Tsk2-Tsub2) / Rthir.

As described above, according to the fifth embodiment, since the thermal resistance Rthbody from the deep tissue of the living body to the body surface BS is obtained by calculation, the thermal resistance is obtained by another measuring means (for example, the above-mentioned internal electrical resistance measuring means). It is not necessary to measure (estimate) Rthbody.

Next, with reference to FIGS. 6 (a) and 6 (b), the biological data measuring device 1 according to the sixth embodiment is based on, for example, the fourth embodiment described with reference to FIG. It is characterized by enhancing.

That is, in the sixth embodiment, as shown in FIG. 6B, the entire lower surface of the case 40 (the surface facing the body surface BS) is covered with the sheet 51, and the lower surface of the sheet 51 (the surface facing the body surface BS) is covered. ) Is coated with the adhesive gel 52 to a predetermined thickness. According to this, the biological data measuring device 1 can be familiarly attached to the body surface BS.

In order to prevent the soft adhesive gel 52 from being deformed and the thickness of the air layer A from changing, a hard (highly elastic) material is used for the sheet 51 due to the adhesive gel 52.

In this case, the radiation thermometer 21 measures the temperature of the sheet 51, but in order to obtain the thermal resistance Rthbody in the body, the thermal resistance Rth of the sheet 51 and the adhesive gel 52 may be subtracted. Alternatively, the body surface temperature Tsk can be measured by using an infrared transmissive material for the sheet 51 and the adhesive gel 52.

Further, the thermal resistance can be increased by enclosing a rare gas such as xenon, krypton, or argon in the space serving as the air layer A. Further, for example, the sheet 51 may be embossed to form a sweat discharge groove in the adhesive gel 52. According to this, the effect of maintaining the adhesiveness of the adhesive gel is achieved.

As a modification of the sixth embodiment, in order to enable the body surface temperature to be directly measured by the radiation thermometer 21, as shown in FIG. 6 (c), a sheet is formed from the center of the bottom surface of the case 40. The 51 and the adhesive gel 52 may be eliminated, and such an embodiment is also included in the present invention. This sixth embodiment can also be applied to the fifth embodiment described with reference to FIG.

As shown in FIGS. 7A and 7B, the biological data measuring device 1 is attached to a predetermined portion of the living body H (for example, chest, abdomen, etc.) via a belt 60. The biometric data measuring device 1 shown in FIG. 7B is the biometric data measuring device 1 of the third embodiment described above with reference to FIG. 3, but the biometric data measuring device 1 of another embodiment. May be.

The belt 60 is preferably made of a rubber material having a large elongation rate (preferably a rubber material having an elongation rate of several tens to several hundreds of percent) as an elastic structure. Further, as a measure against heat stroke in the summer, it is preferable to give the belt 60 a breathability made of, for example, a mesh (mesh) so that the belt 60 does not interfere with the breathability to the living body H.

By the way, since the case 40 has a low thermal resistance, if an arm or the like touches the case 40 while it is attached to the living body H, an error may occur in the body temperature measurement due to a rapid temperature change. Therefore, in the seventh embodiment shown in FIG. 8, a protective cover 70 that covers the case 40 is provided.

The protective cover 70 is made of a heat insulating material that does not easily transfer heat, such as polyurethane or polystyrene having a high degree of foaming. The protective cover 70 is formed as a box body having an open bottom surface that is one size larger than the case 40, and is provided with belt insertion openings 71, 71 for passing the belt 60 on both opposite side surfaces.

Next, the eighth embodiment will be described with reference to FIG. In this embodiment, when the biological data measuring device 1 is attached to the body surface BS with the belt 60 as described above, the body surface BS rises due to the tightening force of the belt 60 and the distance between the air layers A (with the substrate 10). As a case for preventing the change (distance from the body surface BS), a case 40A having a case body 41 having an open upper surface and a lid 42 detachably covered on the upper surface of the case body 41 is used. ..

The case body 41 is a box body having an open top surface having a square bottom plate 411 and side plates 412 erected on its four sides, and a thermometer 20, a transmission unit 24, a calculation unit 25, and the like are contained therein. The substrate 10 to be held is housed in a state of being supported by the heat insulating material 31 as the support member 30. At the time of use, the upper surface of the case body 41 is closed by the lid 42.

In this embodiment, the case body 41 and the lid 42 are both made of acrylic resin, but other synthetic resin materials may be used as long as they have low thermal resistance, low heat capacity, and can transmit infrared rays. The lid 42 does not necessarily have to be made of a material capable of transmitting infrared rays, but it is necessary to select a material capable of transmitting the radio wave (electromagnetic wave) of the transmitting unit 24.

By using such a case 40A, even if the biological data measuring device 1 is strongly tightened to the body surface BS with the belt 60, the distance between the air layer A existing between the substrate 10 and the body surface BS is kept constant. Dripping.

Further, the biological data measuring device 1 according to the eighth embodiment includes a high thermal conductive film 53 for transmitting heat in and out from the side surface (side plate 412) of the case 40A to the substrate 10. Here, high thermal conductivity is defined as a thermal resistance of around 0.01 m · K / W (heat conductivity of around 100 W / m / K), and an aluminum foil is preferably used for the high thermal conductivity film 53.

According to this embodiment, the high thermal conductive film (aluminum foil) 53 is arranged from the lower peripheral edge of the substrate 10 to the inner surface of the heat insulating material 31 so as to be in close contact with each of the surfaces. According to this, even if the environmental temperature changes, the body surface temperature (skin temperature) Tsk changes via the substrate 10, so that it is possible to eliminate the error caused by the change of the body surface temperature Tsk alone. can.

The high thermal conductive film 53 preferably has an infrared emissivity close to zero (almost zero). The reason is that the temperature change of the heat insulating material 31 is not radiated toward the air layer A even when the heat cannot be sufficiently transferred to the substrate 10 due to the limit of heat conduction.

The high thermal conductive film 53 can also be applied to the case of each embodiment including the case 40 having an open bottom surface described with reference to FIGS. 3 to 6. In this case, for example, as shown in FIG. 5B, the high thermal conductive film 53 is arranged in the case 40 from the side plate 402 to the substrate 10.

Next, the relationship between the thermal resistance of each part and the temperature at the time of measuring the body temperature will be described by taking the biological data measuring device 1 according to the fourth embodiment described with reference to FIG. 4 as an example.

First, in the graph of FIG. 10A, the horizontal axis is the thermal resistance Rth (unit: Km ² / W), and the vertical axis is the temperature (unit: ° C.). It shows the transition. In this graph, for example, a core body temperature of 36.5 ° C. and an environmental temperature of 0 ° C. are assumed, and a winter season in which underwear + a shirt + a sweater is worn is assumed.

From deep inside the body to the body surface (assuming a thickness of 25 mm), static atmosphere (assuming an air layer of 3 mm above and below the substrate), winter clothing (assuming an air layer of 1 mm under underwear, shirts and sweaters), See the table in Fig. 10 (b) for each thermal resistance and thermal resistance in the open atmosphere (with convection).

In the graph of FIG. 10A, the slope of the straight line (T / Rth) is Heat Flux Is, and in this example, Is = 55 W / m ² .

Next, in the graph of FIG. 11A, the horizontal axis is the thermal resistance Rth (unit: Km ² / W), and the vertical axis is the temperature (unit: ° C.). Shows the transition of. In this graph, the core body temperature is 36.5 ° C. and the environmental temperature is 25 ° C., and it is assumed that the summer is when only a shirt is worn.

From deep inside the body to the body surface (assuming a thickness of 25 mm), static atmosphere (assuming an air layer of 3 mm above and below the substrate), summer clothing (assuming an air layer of 1 mm under the shirt), open atmosphere (with convection) ), Refer to the table in FIG. 11 (b) for each thermal resistance and thermal resistance.

In the graph of FIG. 11A, the slope of the straight line (T / Rth) is Heat Flux Is, and in this example, Is = 23 W / m ² .

Next, regarding the biological data measuring device 1 having two thermometers according to the fifth embodiment described with reference to FIG. 5, the relationship between the thermal resistance and the temperature of each part at the time of measuring the body temperature will be described with reference to FIG.

Similar to the graph of FIG. 11A, the graph of FIG. 12A has a core body temperature of 36.5 ° C. and an environmental temperature of 25 ° C., and assumes a summer in which only a shirt is worn.

From the deep part of the body to the body surface (assuming a thickness of 25 mm), static atmosphere (assuming 3 mm air layers above and below the substrate of the second thermometer 20b), heat insulating material (thickness on the upper surface of the substrate of the first thermometer 20a). (3 mm polystyrene is set), summer clothing (assuming a 1 mm air layer under the shirt), and open air (with convection) thermal resistance and thermal resistance, see the table in FIG. 12 (b).

In the graph of FIG. 12A, the broken line is the heat flow Is1 measured by the first thermometer 20a, and the solid line is the heat flow Is2 measured by the second thermometer 20b. Since these heat flows Is1 and Is2 are different, the core body temperature Tcore can be calculated from the body surface temperature Tsk and the heat flows Is1 and It2.

As described above, the biometric data measuring apparatus of the present invention has, as a basic configuration, a substrate, a radiation thermometer and a substrate thermometer mounted on the substrate, and a position where the substrate is separated from the body surface by a predetermined distance. Since it is configured with a support member that supports it, the configuration is simple and can be manufactured at low cost. Further, since the heat insulating layer between the substrate and the body surface is an air layer, the thermal resistance between the substrate and the body surface can be made a large value.

1 Biometric data measuring device 10 (10a, 10b) Board 11 Flexible board 20 (20a, 20b) Thermometer 21 Radiation thermometer 22 Board thermometer 30 Support member 31 Insulation material 40, 40A Case 41 Case body 42 Lid 51 Sheet 52 Adhesive Gel 53 High thermal conductive film 60 Belt 70 Protective cover

Claims (7)

A substrate is provided at a position separated from the body surface by a predetermined distance via a support member so that an air layer is formed between the body surface of the living body to be measured, and the body of the body surface is provided on the substrate. A thermometer including a radiation thermometer for measuring the surface temperature and a substrate thermometer for measuring the substrate temperature of the above substrate is provided .
The support member is made of a heat insulating material, and a substantially sealed space as the air layer is formed between the radiation thermometer and the body surface.
The substrate is supported by the heat insulating material, and is composed of a box body having an open bottom surface on the body surface side having a top plate and a side plate bent downward at a substantially right angle from the peripheral edge of the top plate. The entire bottom surface is covered with a sheet, and the surface side of the sheet is housed in a case coated with an adhesive gel.
A biological data measuring device characterized in that a high thermal conductive film that transfers heat entering and exiting from the side plate side to the substrate is provided in the case. A substrate is provided at a position separated from the body surface by a predetermined distance via a support member so that an air layer is formed between the body surface of the living body to be measured, and the body of the body surface is provided on the substrate. A thermometer including a radiation thermometer for measuring the surface temperature and a substrate thermometer for measuring the substrate temperature of the above substrate is provided.
The support member is made of a heat insulating material, and a substantially sealed space as the air layer is formed between the radiation thermometer and the body surface.
A box-shaped case body having an open upper surface including a bottom plate and a side plate bent upward at a substantially right angle from the peripheral edge of the bottom plate while the substrate is supported by the heat insulating material, and the upper surface of the case body. It is housed in a case with a removable lid.
A biological data measuring device characterized in that a high thermal conductive film that transfers heat entering and exiting from the side plate side to the substrate is provided in the case. A calculation unit that obtains the heat flow Is by (Tsk-Tsub) / Rthir, where Tsk is the body surface temperature, Tsub is the substrate temperature, Rthir is the thermal resistance of the air layer, and Is is the heat flow that flows substantially perpendicular to the body surface. The biometric data measuring apparatus according to claim 1 or 2, wherein the biometric data measuring device is provided. The third aspect of claim 3 , wherein the thermal resistance from the deep tissue of the living body to the surface of the body is Rthbody, the deep body temperature of the living body is Tcore, and the calculation unit obtains the deep body temperature Tcore by Tsk + Is × Rthbody. Biological data measuring device. The fourth aspect of claim 4 , further comprising an internal electrical resistance measuring means for measuring the electrical resistance in the living body, and estimating the thermal resistance Rthbody from the internal electrical resistance value measured by the internal electrical resistance measuring means. Biometric data measuring device. A substrate is provided at a position separated from the body surface by a predetermined distance via a support member so that an air layer is formed between the body surface of the living body to be measured, and the body of the body surface is provided on the substrate. A thermometer including a radiation thermometer for measuring the surface temperature and a substrate thermometer for measuring the substrate temperature of the above substrate is provided.
As the thermometer, a first thermometer including a first radiation thermometer for measuring the body surface temperature of the body surface and a first substrate thermometer for measuring the substrate temperature of the substrate on the substrate, and a body surface of the body surface. A second radiation thermometer for measuring the temperature and a second thermometer including a second substrate thermometer for measuring the substrate temperature of the substrate are juxtaposed, and the first thermometer of the substrate is arranged. A biometric data measuring device characterized in that the upper surface of a substrate is covered with a heat insulating material . It has a calculation unit for obtaining the deep body temperature Tcore of the living body, and the body surface temperature measured by the first thermometer is measured by Tsk1, the heat flow flowing substantially perpendicular to the body surface is measured by Is1, and the second thermometer is used. The body surface temperature is Tsk2, the heat flow flowing almost perpendicular to the body surface is Is2, the heat resistance from the deep tissue of the living body to the body surface is Rthbody, and the calculation unit is (Tsk2-Tsk1) / (Ith1-). The biological data measuring apparatus according to claim 6 , wherein the core body temperature Tcore of the living body is obtained from (Its1 × Rthbody + Tsk1) or (Its2 × Rthbody + Tsk2) after calculating Rthbody from Is2).

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