DEEP BODY THERMOMETER OF THE ADHESIVE TYPE

Abstract

A deep-body thermometer of the adhesive type, which is glued to a living body to measure a deep-body temperature, the deep-body thermometer of the adhesive type comprising: a thermal resistor with a predetermined thermal resistance; a first temperature detection unit, which is arranged on a surface side of the thermal resistor and which detects a first temperature of an adhesive surface side; a correction value detection unit, which obtains a first correction value, which is a correction value which is used to correct the first temperature, according to a first difference value, which is a difference value between the first temperature and a reference temperature, which is set to a temperature higher than the first temperature; and a deep-body temperature detection unit, which obtains a deep-body temperature by correcting the first temperature using the first correction value.

Description

Technical field

[0001] The present invention relates to a deep-body thermometer of the adhesive type, which is glued to a living body in order to measure a deep-body temperature. State of the art

[0002] So far, a thermometer has been proposed that is attached to a body surface to record body temperature data through continuous measurement. For example, patent document 1 describes a deep-body non-heating thermometer that is attached to the body surface of a tested subject to measure the subject's deep-body temperature.

[0003] The deep-body thermometer comprises a first and a second thermal resistor, in each of which a first temperature sensor is arranged on a side surface which is in contact with a body surface, and a second temperature sensor is arranged on the other side surface which is opposite the first side surface, a compensating element which is arranged to cover only the other side surface of each of the first and second thermal resistors, a thermal insulation element which is arranged to surround one side surface of each of the first and second thermal resistors, and a protective element whose circumferential section is attached to the other side surface of the thermal insulation element and whose central section is arranged at a predetermined distance from the compensating element.

[0004] In order to eliminate the influence of a disturbance absorbed by the compensating element, i.e. a rapid temperature change in the exterior (a side opposite a side in contact with a body surface), the deep-body thermometer improves measurement accuracy with a design that does not block heat flow from an interior to an exterior and interrupts disturbance from the exterior to the compensating element. List of references Patent document

[0005] Patent document 1: Unexamined Japanese patent disclosure no. 2012-154859 Brief description of the invention: Technical problem

[0006] However, the deep-body thermometer described above does not account for errors other than a rapid external temperature change (disturbance). For example, the amount of heat transferred to the surroundings fluctuates due to variations in blood flow in the skin; such heat transfer or similar effects in the skin are not considered by the deep-body thermometer described above. If sweating occurs, the body surface temperature decreases due to the heat from evaporation at the time the sweat evaporates; however, sweat evaporates very little in the area where the deep-body thermometer is applied, compared to the surrounding area, so the decrease in body surface temperature is minimal.For this reason, the temperature is higher than in the surrounding area, and heat is transferred to the surrounding area due to heat conduction through the skin and blood flow; however, such heat transfer through the skin is not taken into account by the deep-body thermometer described above. Therefore, an estimated deep-body temperature can differ from the actual value.

[0007] The present invention is intended to solve the above-mentioned problem, and one object of the present invention is to provide a deep-body thermometer of the adhesive type which is glued to a living body in order to measure a deep-body temperature, and which furthermore improves a deep-body temperature measurement accuracy. Solution to the problem

[0008] A deep-body thermometer of the adhesive type according to the present invention is a deep-body thermometer of the adhesive type which is glued to a living body to measure body temperature and which comprises: a thermal resistor with a predetermined thermal resistance; a first temperature detection unit which is arranged on a surface side of the thermal resistor and which detects a first temperature of an adhesive surface side; a correction value detection unit which obtains a first correction value, which is a correction value which is used to correct the first temperature, according to a first difference value, which is a difference value between the first temperature and a reference temperature, which is predetermined according to a temperature which is higher than the first temperature;and a deep body temperature sensing unit which obtains a deep body temperature by correcting the first temperature using the first correction value;

[0009] With the adhesive-type deep-body thermometer according to the present invention, a first temperature is detected on the adhesive surface side of the thermal resistance, a first correction value, which is used to correct the first temperature, is obtained according to a first difference value between the first temperature and a reference temperature, which is predetermined to be higher than the first temperature, and a deep-body temperature is obtained by correcting the first temperature using the first correction value.Using a first differential value between a first temperature on an adhesive surface (body surface) and a reference temperature, which is set to a higher temperature than the first temperature, as a parameter, the first differential value decreases if, for example, the first temperature (body surface temperature) increases with an increase in thermal radiation from the body surface and consequently approaches the deep body temperature. In this case, measurement accuracy is improved by reducing the first correction value. Conversely, the first differential value increases if the first temperature (body surface temperature) decreases with a reduction in thermal radiation from the body surface and consequently deviates from the deep body temperature. In this case, measurement accuracy is improved by increasing the first correction value.In this way, a physiological response associated with thermoregulation through sweating and blood flow can be taken into account, thus increasing the correlation with the actual deep body temperature. Therefore, a deep body temperature can be obtained with a high degree of accuracy using relatively simple calculations. Advantageous effects of the invention

[0010] According to the present invention, the accuracy of deep body temperature measurement is further improved in a deep body thermometer of the adhesive type, which is glued to a living body in order to measure a deep body temperature. List of characters [ Fig. 1] Fig. Figure 1 shows a top view and a bottom view to illustrate the appearance of a deep-body thermometer of the adhesive type according to a first embodiment. [ Fig. 2] Fig. Figure 2 is a cross-sectional view illustrating the design of the adhesive-type deep-body thermometer according to the first embodiment. [ Fig. 3] Fig. Figure 3 is a block diagram illustrating the functional design of a processing unit, which is a component of the adhesive-type deep-body thermometer according to the first embodiment. [ Fig. 4] Fig. Figure 4 is a graphic illustrating an example of a first function f, which is used to obtain a correction value. [ Fig. 5] Fig. Figure 5 is a graphic illustrating an example of a second function g, which is used to obtain a correction value. [ Fig. 6] Fig. Figure 6 is a graphic illustrating an example of measurement results of a first temperature (T1), a second temperature (T2), a deep body temperature (estimated value) and an esophageal temperature. [ Fig. 7] Fig. Figure 7 is a graph illustrating an example of a relationship (correlation) between a deep body temperature (estimated value) and an esophageal temperature. [ Fig. 8] Fig. Figure 8 is a block diagram illustrating the functional design of a processing unit, which is a component of a deep-body thermometer of the adhesive type according to a first modification of the first embodiment. [ Fig. 9] Fig. Figure 9 is a block diagram illustrating the functional design of a processing unit, which is a component of a deep-body thermometer of the adhesive type according to a second modification of the first embodiment. [ Fig. 10] Fig. Figure 10 is a block diagram illustrating the functional design of a processing unit which is a component of a deep-body thermometer of the adhesive type according to a third modification of the first embodiment. [ Fig. 11] Fig. Figure 11 is a block diagram illustrating the functional design of a processing unit which is a component of a deep-body thermometer of the adhesive type according to a fourth modification of the first embodiment. [ Fig. 12] Fig. Figure 12 is a block diagram illustrating the functional design of a processing unit, which is a component of a deep-body thermometer of the adhesive type according to a second embodiment. [ Fig. 13] Fig. Figure 13 is a graphic illustrating an example of measurement results of a first temperature (T1), a second temperature (T2), a third temperature (T3), a fourth temperature (T4), a deep body temperature (estimated value) and an esophageal temperature. [ Fig. 14] Fig. Figure 14 is a graphic illustrating an example of measurement results of a first temperature (T1), a deep body temperature (estimated value) and an esophageal temperature. [ Fig. 15] Fig. Figure 15 is a graph illustrating an example of a relationship (correlation) between a deep body temperature (estimated value) and an esophageal temperature. Description of embodiments

[0011] Preferred embodiments of the present invention are described in detail below with reference to the drawings. In the drawings, identical reference numerals refer to the same or corresponding sections. In the drawings, identical reference numerals denote the same components, and further description is omitted.

[0012] First, the design of a deep-body thermometer will be described. 1 of the adhesive type (which may hereinafter simply be referred to as a deep-body thermometer or thermometer) according to the embodiment with reference to Fig. 1 to Fig. 3 described. Fig. Figure 1 shows a top view and a bottom view to illustrate the appearance of the deep-body thermometer. 1 of the adhesive type. Fig. Figure 2 is a cross-sectional view illustrating the design of the deep-body thermometer. 1of the adhesive type (cross-sectional view when viewed along line II-II in Fig. 1). Fig. Figure 3 is a block diagram illustrating the functional design of a processing unit. 41 , which is a component of the deep body thermometer 1 of the adhesive type.

[0013] The deep body thermometer 1 is a deep-body thermometer of the non-heating type, which obtains a heat flow from a deep part of a user (subject) to obtain a deep-body temperature according to temperatures determined by a first temperature sensor. 701 (which corresponds to a first temperature detection unit described in the claims) and a second temperature sensor 702 (which corresponds to a second temperature detection unit), and / or temperatures, each detected by a third temperature sensor 703 and a fourth temperature sensor 704to be detected, to be recorded. The deep-body thermometer 1 is a deep-body thermometer of the adhesive type (patch type) which is stuck to a user's (subject's) body surface to record body temperature data by continuously measuring body temperature.

[0014] The deep body thermometer 1 mainly features an upper outer body 10 , a lower outer body 20 , a body temperature measuring unit 15 , a lining element 80 , a shock-absorbing element 90 and an adhesive element 60 on. The body temperature measuring unit 15 It mainly has a heat resistance layer. 30 , a wiring substrate 40 and a flexible substrate 50 up. The second temperature sensor 702 and the fourth temperature sensor 704 are on the wiring substrate 40 installed. The first temperature sensor701 and the third temperature sensor 703 are on the flexible substrate 50 assembled.

[0015] The upper outer body 10 For example, it is made of a closed-cell or semi-closed-cell foamed material with waterproof and heat retention properties. The upper outer body 10 is preferably made of a foamed material with low thermal conductivity to prevent local changes in the temperature of the body temperature measuring unit 15 to prevent damage due to a steep variation (change) in outside air temperature. For example, polyurethane, polystyrene, polyolefin, or the like are expediently used as the material. For example, vacuum forming is expediently used as a method for processing the upper outer body. 10 used. The upper outer body 10 In cross-section, it essentially has a hat shape, so that the body temperature measuring unit15 (the thermal resistance layer 30 , the wiring substrate 40 , the flexible substrate 50 and the like) can be absorbed. Therefore, the side surface of the thermal resistance layer 30 covered with a foamed material and an exposure of the side surface of the heat resistance layer 30 Access to outside air is prevented.

[0016] The lower outer body 20 For example, it is made of a non-foamed resin film with a waterproof property (low moisture permeability) and a higher thermal conductivity than the upper outer body. 10 Examples of the material include polypropylene, polyethylene, polyester, and polyimide. Polyethylene terephthalate is particularly useful as the material. The lower outer body 20 is formed in a flat shape, so that the flexible substrate 50, on which the first temperature sensor 701 and the third temperature sensor 703 are mounted (the body temperature measuring unit) 15 ) in close contact with the lower outer body 20 can be attached. If there is a gap between the body temperature measuring unit 15 and the lower outer body 20 The presence of a thermal resistance varies and influences heat flow, so that the body temperature measuring unit 15 and the lower outer body 20 Ideally, they should be fastened together in close contact using an adhesive method with double-sided tape, a fastening method with glue, or the like. The upper outer body 10 and the lower outer body 20are designed to have the same or substantially the same dimensions (external dimensions), and are designed to have a size of, for example, approximately 40 mm to approximately 100 mm long and approximately 20 mm to approximately 60 mm wide.

[0017] A circumferential section of the upper outer body 10 , which in cross-section is essentially formed in a hat shape, and a circumferential section of the lower outer body 20 The components, which are formed in a flat shape, are brought into close contact with each other, for example, by bonding with double-sided adhesive tape, fastening with adhesive, heat sealing, or similar methods. To achieve water resistance, it is desirable that a section containing the upper outer body 10 and the lower outer body 20are attached in close contact with each other, are flat, and less prone to wrinkling. In other words, it is desirable that the outer circumference section of the lower outer body be flat. 20 flat, the outer circumferential section of the opposite upper outer body 10 It is equally flat and these are glued together to ensure close contact. With this design, a force acts uniformly on a fastening section with close contact, so that defects that adversely affect water resistance, such as wrinkling, are less likely to occur.

[0018] As in Fig. Figure 2 shows the body temperature measurement unit. 15 by laminating the flexible substrate 50 , the thermal resistance layer 30 and the wiring substrate 40 in this order from the side of the lower outer body 20manufactured here.

[0019] The thermal resistance layer 30 It has two thermal resistances with different thermal resistance values, that is, a first thermal resistance 301 and a second thermal resistance 302 to form two heat flows. One material has a lower thermal conductivity (a higher thermal resistance value) than the other. 302 For example, foamed plastics (foamed material) such as polyurethane, polystyrene and polyolefin are expediently used as the first thermal resistance. 301 used. Non-foamed plastics, rubber, or similar materials can also be used. A material with a higher thermal conductivity (a lower thermal resistance value) than the first thermal resistance. 301 For example, plastics such as polypropylene, polyethylene, acrylic, polycarbonate and epoxy resin are expediently used as the second thermal resistance. 302used. Here, the thermal conductivity of a metal such as copper and aluminum is equal to or greater than 100 [W / m / K]; whereas the thermal conductivity of plastics such as polypropylene, polyethylene, acrylic, polycarbonate, and epoxy resin is approximately 0.1 to 0.5 [W / m / K] and is about three orders of magnitude lower. The thermal conductivity of foamed plastics is further reduced by about one order of magnitude. The thermal conductivity of air is even lower, at 0.024 [W / m / K]. The first thermal resistance 301 and the second thermal resistance 302 are designed to have essentially the same thicknesses, in order to allow the first thermal resistance 301 and the second thermal resistance 302 with the wiring substrate 40 and the flexible substrate 50 stacked to reduce costs.

[0020] The first thermal resistance 301, which is a component of the thermal resistance layer 30 is, has a first through hole 301a which extends through in one thickness direction. Similarly, the second thermal resistance exhibits 302 , which is a component of the thermal resistance layer 30 is a second through-hole 302a which extends through in the direction of thickness. When the first through-hole 301a Viewed from above, the first through hole 301a designed in such a way that the first temperature sensor 701 and the second temperature sensor 702 are recorded inside. In other words, the pair of the first temperature sensors 701 and the second temperature sensor 702 along the thickness direction of the first thermal resistance 301 inside (inside) the first through hole 301a arranged. Similarly, if the second through-hole 302aViewed from above, the second through-hole 302a designed in such a way that the third temperature sensor 703 and the fourth temperature sensor 704 are recorded inside. In other words, the pair of third temperature sensors 703 and the fourth temperature sensor 704 along the thickness direction of the second thermal resistance 302 inside the second through hole 302a arranged.

[0021] For example, a thermistor, a resistance thermometer sensor, or the like is conveniently used as each of the first temperature sensors. 701 up to the fourth temperature sensor 704(which can be collectively referred to as temperature sensors 70 in the following) are used. Each temperature sensor 70 ideally has a heat capacity that is as low as possible with regard to increasing the response time. Thus, for example, a chip thermistor is expediently used as each temperature sensor 70. Each of the first temperature sensor 701 up to the fourth temperature sensor 704 is by means of a printed circuit board with the (described below) processing unit 41 (Processing circuit) electrically connected and the processing unit 41 It reads an electrical signal (a voltage value) according to a temperature.

[0022] Incidentally, it is about the size of the heat flow deep body thermometer 1 To reduce the size of the thermal resistance layer, it is important to do so. 30 (of the first thermal resistance) 301 and the second thermal resistance 302) to reduce; if the size of the thermal resistance layer 30 (of the first thermal resistance) 301 and the second thermal resistance 302 While reducing the thermal resistance layer, this also reduces the difference between the output values ​​of the paired temperature sensors 70, raising concerns that measurement error may increase. Each temperature sensor 70 (chip thermistor) has a substantially rectangular parallelepiped shape and a thickness that cannot be disregarded when considering the thermal resistance layer. 30 (the first thermal resistance 301 and the second thermal resistance 302 ) becomes thinner. When the temperature sensor 70 is in contact with the side surface of the thermal resistance layer 30 (of the first thermal resistance) 301 and the second thermal resistance 302Since the contact section is in contact, heat is transferred from the contact section, so there are concerns that the temperature (the detected value) of the temperature sensor 70 will be a temperature (a value) which is different from the surface temperature of the thermal resistance layer. 30 (of the first thermal resistance) 301 and the second thermal resistance 302 ) differs. Therefore (to reduce the influence), the through holes are 301a , 302a in the thermal resistance layer 30 (the first thermal resistance 301 and the second thermal resistance 302 ) formed around the temperature sensors 70 to provide such a structure that the temperature sensors 70 do not come into contact with the side surface of the thermal resistance layer 30 (of the first thermal resistance) 301 and the second thermal resistance 302 ) are in contact.

[0023] The wiring substrate 40For example, a rigid substrate such as a glass epoxy substrate. The processing unit 41 (Processing circuit) is on or in the wiring substrate 40 implemented. The processing unit 41 (Processing circuit) acquires deep body temperature data by processing output signals from the first temperature sensor. 701 up to the fourth temperature sensor 704 A wireless communication unit 403 and a 404 button cell are on the wiring substrate 40 installed. The wireless communication unit 403 It transmits (outputs) recorded deep body temperature data. The 404 button cell powers the processing unit. 41 and the wireless communication unit 403 electrical current. The processing unit 41 It mainly features a temperature input unit. 42 (Temperature input circuit) and a calculation processing unit 43(Calculation processing circuit). The temperature input unit 42 is set up to include, for example, an amplifier (e.g., an operational amplifier), an analog-to-digital converter (A / D converter), and the like, in order to read detection signals (output voltages) from the temperature sensors 70. The temperature input unit 42 amplifies an analog signal output from each temperature sensor 70, converts the analog signal into a digital signal and outputs the digital signal to the processing unit. 43 out of.

[0024] The computing processing unit 43 It consists, for example, of an MCU (microcontroller unit), an EEPROM, RAM, and the like. The processing unit 43 Based on the read temperature data, a deep body temperature is calculated. The details are described below.

[0025] The second temperature sensor 702and the fourth temperature sensor 704 are on the lower surface of the wiring substrate 40 installed. The second temperature sensor 702 measures the temperature of the upper surface (outside air side) of the first thermal resistance 301 The fourth temperature sensor 704 detects the temperature of the upper surface (outside air side) of the second thermal resistor 302 More precisely, a pair of heat equalization patterns, which compensate for an surrounding temperature distribution, are located on the lower surface of the wiring substrate. 40 formed, one of the electrodes of the second temperature sensor 702 is connected to one of the heat equalization patterns and is one of the electrodes of the fourth temperature sensor 704 is connected to the other of the heat balance patterns. The pair of heat balance patterns is, for example, made of a material with high thermal conductivity, such as a metal film.

[0026] To change only the temperature of a part of the wiring substrate 40 To prevent interference due to the influence of outside air temperature or similar factors, it is desirable to provide a compensating element (metal film) with high thermal conductivity that thermally compensates for the influence of an outside air temperature distribution on the back surface (outside air side) of a wiring layer on which the second temperature sensor is located. 702 and the fourth temperature sensor 704 are mounted. A metal foil, a thin metal sheet, or the like can be used as the leveling element and, as in the case of the one on or in the wiring substrate. 40 In a well-formed wiring layer, it is desirable that the compensating element be used as a wiring pattern (solid pattern) of an inner layer of the wiring substrate. 40(rigid multilayer substrate). In this case, the wiring pattern of the inner layer used as the equalizing element can be a grounding pattern, and it is desirable that the wiring pattern be an independent pattern that is not connected to the electrical circuit and through which no current flows.

[0027] The wireless communication unit 403 It transmits recorded deep body temperature data or similar information to an external management device and system or a mobile device (e.g., a smartphone) belonging to an administrator or supervisor. The wireless communication unit transmits this data. 403 For example, using Bluetooth (registered trademark) or similar technologies, deep body temperature data can be transmitted to the external management device and management system. 3. On the other hand, the wireless communication unit can 403For example, outdoor air temperature data or similar information received from the external management device and system or information terminal.

[0028] The low-profile 404 button cell (battery) powers the processing unit. 41 , the wireless communication unit 403 , which are described above, and similar electrical current. The button cell 404 is held in a battery holder 95, which is mounted on the wiring substrate. 40 It is mounted (attached). The battery holder 95 is located between the wiring substrate. 40 and the lining element 80 arranged. In other words, the battery holder 95 also serves as a spacer element, which the lining element 80 It is worn. To cover the flat area (adhesive area) of the body temperature measuring unit. 15 (Deep-body thermometer) 1) to reduce and also to prevent the influence of heat generation resulting from a change in outside air temperature or the operation of the wireless communication unit 403 As a result, the wireless communication unit 403 and the button cell 404 (the battery holder 95) from the temperature sensors 70 beyond or opposite the wiring substrate 40 (top surface) arranged.

[0029] A 406 power switch is located on the upper surface (main surface) of the wiring substrate. 40 mounted. The 406 circuit breaker receives signals via its upper outer body. 10 A user's on / off operation of the power supply. The wiring substrate 40 is in an enclosed space, which is defined by the upper outer body 10 and the lower outer body 20 is defined, recorded in such a way that the power switch 406 of the rear surface (back surface) of the upper outer body10 is directed towards. For example, a push-button switch, a rocker switch, or the like is conveniently used as the 406 power switch. In the case of a push-button switch, it is desirable that the push-button switch be of a changeover type, which retains an on state even when a fingertip is released. A surface-mount type switch is desirable as the 406 power switch; however, a reed type switch may be used equally.

[0030] To prevent the power switch 406 from being accidentally pressed down to turn the power on or off, and also to ensure that the power switch 406 does not damage the upper outer body 10 When pushed upwards, the power switch 406 is arranged so that it does not touch the upper outer body 10is in contact. More precisely, there is a gap between the upper button surface (top surface) of the power switch 406 and the rear surface (back surface) of the upper outer body. 10 For example, the stroke of the current switch 406 is ideally set within a range of 0 mm to 4 mm and ideally within a range of 0.5 mm to 1.5 mm. The stroke of the current switch 406 is ideally set within a range of 0.1 mm to 1 mm and ideally within a range of 0.1 mm to 0.3 mm.

[0031] An LED 405 is located on the upper surface of the wiring substrate. 40The LED 405 illuminates or flashes according to a user operation or the status of a deep body temperature measurement (for example, the on / off state of the power switch 406, measurement start / stop, installation / removal status, and the like). For example, a VCSEL or similar can be used instead of the LED. An FPC connector is also included. 407 for the electrical connection of the flexible substrate 50 on the lower surface of the wiring substrate 40 appropriate.

[0032] The flexible substrate 50 It is made of materials such as polyimide, polyester, or similar materials and is flexible. The first temperature sensor 701 and the third temperature sensor 703 are on the flexible substrate 50 installed. The first temperature sensor 701 measures the skin-side temperature of the first thermal resistance 301 The third temperature sensor 703It measures the skin-side temperature of the second thermal resistance. 302 More precisely, a pair of heat exchange patterns on the flexible substrate 50 designed to compensate for the surrounding temperature distribution, one of the terminals of the first temperature sensor 701 is connected to one of the heat equalization patterns and one of the connections of the third temperature sensor 703 is connected to the other of the heat exchange patterns. The pair of heat exchange patterns is, for example, made of a material with high thermal conductivity, such as a metal film. Each of the first temperature sensor 701 and the third temperature sensor 703 is achieved using the wiring pattern and the FPC connector described above. 407 with the wiring substrate 40 (the processing unit 41 ) connected. The processing unit 41 (temperature input unit) 42It reads an electrical signal (a voltage value) corresponding to a temperature. As described above, the lower outer body forms 20 , the flexible substrate 50 , the thermal resistance layer 30 and the wiring substrate 40 Heat flows, so that these components are attached to each other in such close contact, for example by double-sided adhesive tape, that no gap is formed between them.

[0033] The lining element 80 is between the rear surface (back surface) of the upper outer body 10 , that is, the upper outer body 10 and both the shock absorber element 90 as well as the battery holder (spacer element) 95. The lining element 80 is formed in a thin layer form, which is thinner than the (below described) shock-absorbing element 90 is. The lining element 80It is constructed in such a way that, in order to prevent wrinkling of the upper outer body 10 to reduce, for example by using double-sided adhesive tape or the like to connect one of the surfaces to the rear surface (back surface) of the upper outer body. 10 It is glued in place. The lining element 80 For example, it is made of a resin material such as polyethylene terephthalate, which is flexible so that it is flexible (bendable) in one operating direction (for example, in the direction of pressing down) of the power switch 406. The lining element 80 It can be made from a thin sheet of metal or something similar.

[0034] The lining element 80 has a through hole 80a in the thickness direction. The 406 power switch fits into the through hole. 80a , if the lining element 80 viewed from above. The through-hole 80aIt can be designed in such a way that the circumference of the hole is completely closed, or it can be designed in such a way that the circumference of the hole is not completely closed. The through-hole 80a of the lining element 80 is designed with a size smaller than the outer diameter of a fingertip to prevent the entire fingertip from entering, while allowing only the tip of a fingertip to enter and press the power switch 406. More precisely, since variations in the outer diameter of a fingertip exist between individuals, the inner diameter of the through-hole is 80a For example, a desirable thickness is specified within a range of 10 mm to 20 mm, and a more desirable thickness is specified within a range of 13 mm to 16 mm. If the thickness of the upper outer body 10If the material is thick (if the thickness is equal to or greater than, for example, 2 mm), it is desirable to use a smaller inner diameter for the through-hole. 80a according to the thickness of the upper outer body 10 to increase.

[0035] The shock absorber element 90 with shock-absorbing properties (cushioning properties), which is formed in a layered form, is located between the upper surface (main surface) of the wiring substrate. 40 and the lining element 80 arranged. The shock-absorbing element 90 is designed to be thicker than one dimension (one height) of the mounting surface of the wiring substrate. 40 for the one on the wiring substrate 40 mounted circuit breaker 406 and a dimension (a height) from the mounting surface of the wiring substrate 40 It is for electronic components. The shock-absorbing element 90It is installed by attaching it to the other surface of the lining element, for example using double-sided adhesive tape or similar. 80 is glued.

[0036] The shock absorber element 90 has a through hole 90a in the thickness direction. The 406 power switch fits into the through hole. 90a , if the shock absorber element 90 viewed from above. The shock-absorbing element 90 The formed through-hole (the opening section) 90a is designed and arranged such that, when viewed from above, it leads into the lining element. 80 The formed through-hole (the opening section) 80a fits. In other words, the through-hole is 90a of the shock absorber element 90 designed so that it is smaller than the through hole 80a of the lining element 80 is. Each of the shock-absorbing elements in the shock absorber 90formed through hole 90a and of the lining element 80 formed through hole 80a It essentially has a circular shape (including, for example, an elliptical shape or the like) and is defined (designed) such that the inner diameter is smaller than the outer diameter of a fingertip. More precisely, the inner diameter of the opening section is 90a of the shock absorber element 90 For example, a desirable range of 8 mm to 18 mm is specified, and a more desirable range of 11 mm to 14 mm is specified. If the upper outer body 10 If the material is thick (for example, equal to or thicker than 2 mm), it is desirable that the inner diameter of the through-hole be of a certain thickness. 90a is increased according to the thickness.

[0037] The adhesive element 60 exhibits a first adhesive layer 601 , a ventilation layer 603and a second adhesive layer 602 on. The first adhesive layer 601 is connected to an outer surface of the lower outer body 20 glued. The venting layer 603 is air-permeable (that is, a moisture-permeable layer which allows moisture to pass through) and is bonded to the first adhesive layer 601 bonded. The second adhesive layer 602 is connected to the ventilation layer 603 stuck together. Furthermore, if the deep-body thermometer 1 When used on skin, skin irritation can occur if sweat remains between the skin and the deep-body thermometer for an extended period of time. 1 (the lower outer body 20 ) accumulates; however, stuffiness due to sweat or the like is prevented by removing the adhesive element. 60 with the ventilation layer 603reduced, which allows moisture to pass through. For example, non-woven fabric can be usefully used as the ventilation layer. 603 (moisture-permeable layer) can be used. Instead of non-woven fabric, woven or knitted fabric can be used. Alternatively, paper, wood, sponge / open-cell foam material or the like can be used, or a plastic, rubber or metal structure with a groove or hole extending from the center of the body temperature measuring unit. 15 It can be used if it extends in the direction of the circumference.

[0038] The ventilation layer 603 contains air inside, so the ventilation layer 603 It usually has low thermal conductivity. Therefore, when the venting layer 603 between skin and the deep body thermometer 1The provided layer affects the accuracy of body temperature measurements. Therefore (in order to measure body temperature stably), the venting layer is necessary. 603 not located in an area which contains the first temperature sensor 701 and the third temperature sensor 703 , which measure the temperature of the skin, and overlaps the heat balance pattern associated with these.

[0039] This section describes the process using an example in which nonwoven fabric is used as the venting layer. 603 is used. Two pieces of biocompatible double-sided adhesive tape (the first adhesive layer) 601 and the second adhesive layer 602 ) are each connected to both surfaces of the nonwoven fabric (the ventilation layer) 603 ) glued. Through holes 60a , 60b are each located in the ventilation layer 603 and the second detention layer 602formed in the thickness direction. The first temperature sensor 701 and the third temperature sensor 703 When viewed from above, they each fit into the through holes. 60a , 60b It is desirable that there be no through-hole in the section connecting to the lower outer body. 20 bonded double-sided adhesive tape (of the first adhesive layer) 601 ) is formed. This is because if a through-hole is formed (that is, if no first adhesive layer is present). 601 (is provided), there are concerns that the lower outer body 20 not in close contact with skin, consequently reducing measurement accuracy.

[0040] Normally, the double-sided adhesive tape (the second adhesive layer) 602 ) a lower moisture permeability than the nonwoven fabric (the ventilation layer) 603) so that it is desirable that a large number of through holes formed in the thickness direction 60c in at least the second adhesive layer 602 are designed. In this case, for example, it is desirable that the through holes 60c with a diameter of approximately 1 to 10 mm are arranged at intervals of approximately 2 to 20 mm.

[0041] As described above, the computing processing unit 43 (Computer processing circuit) for example, consisting of an MCU (microcontroller unit), an EEPROM, RAM, and the like. The computer processing unit 43 calculates a deep body temperature according to detected values ​​(temperature data) from the temperature sensors 70, which are obtained via the temperature input unit 42 (Temperature input circuit) can be read. The processing unit 43This causes a memory such as RAM to store the calculated deep-body temperature data and the like. Additionally, the processing unit... 43 the calculated deep body temperature data, the application / solution information and the like by outputting the calculated deep body temperature data and the like to the wireless communication unit 403 wirelessly to the external management device and system or the like (transmits it).

[0042] In particular, the computing processing unit exhibits 43 Its function is to improve deep-body temperature measurement accuracy. Therefore, the calculation processing unit has... 43 functionally a correction value acquisition unit 431 and a deep body temperature sensing unit 432 on. In the computing processing unit 43 The functions of the correction value acquisition unit will be described. 431and deep body temperature detection unit 432 This is implemented by having the MCU execute programs stored in the EEPROM or similar.

[0043] First, an embodiment is described to use a first temperature (T1) and a second temperature (T2), which is determined by the first temperature sensor. 701 detected first temperature (T1), one by the second temperature sensor 702 detected second temperature (T2), one by the third temperature sensor 703 detected third temperature (T3) and one by the fourth temperature sensor 704 The detected fourth temperature (T4) is selected to achieve a deep body temperature.

[0044] The correction value recording unit 431It obtains an initial correction value, which is used to correct the initial temperature, for example, according to an initial difference value (T0 - T1). This difference is the difference between the initial temperature (T1) and a reference temperature (T0), which is predetermined as a body temperature limit temperature up to which a body temperature feedback mechanism functions. This reference temperature is higher than the initial temperature (T1). In other words, the correction value acquisition unit functions 431 as a correction value acquisition unit, which is described in the claims.

[0045] Here, the reference temperature (T0) is determined, for example, by an initial temperature (T1) and a deep body temperature, which are actually measured under conditions in which body temperature increases, such as physical activity, and according to a ratio between the two (that is, by comparing the measured values ​​of the initial temperature (T1) and the deep body temperature). The reference temperature (T0) is then ideally set at a value that is equal to or higher than the deep body temperature at rest.In other words, the feedback loop of a physiological response associated with thermoregulation through sweating and blood flow also functions when the core body temperature increases during physical activity or the like compared to rest, such that the reference temperature (T0) is ideally set at a value equal to or higher than the core body temperature at rest. Therefore, the reference temperature (T0) is ideally set, for example, within the range of 39 to 50°C. In particular, the reference temperature (T0) is ideally set within the range of 40 to 45°C. This is because the reference temperature (T0) is considered the upper limit up to which the thermoregulatory function of a living organism operates. In the present embodiment, the reference temperature (T0) is set at 42°C.

[0046] The correction value recording unit 431sets a first correction value such that in a range where the first difference value (T0 - T1) is equal to or greater than zero, the first correction value increases to the extent that the first difference value (T0 - T1) increases, and the rate of increase (slope) of the first correction value increases to the extent that the first difference value (T0 - T1) increases.

[0047] At this point, the correction value acquisition unit obtains 431 for example, a first correction value (f(T0 - T1)) based on the first difference value (T0 - T1) with a first function f, which as in Fig. Figure 4 defines the relationship between the first difference value (T0 - T1) and the first correction value. The first function f is a function of which, in the interval where the first difference value (T0 - T1) is equal to or greater than zero, a first derivative f' is equal to or greater than zero and a second derivative f'' is equal to or greater than zero. For example, an exponential function, a quadratic function, a cubic function, a quartic function, or the like can be used as the first function f.

[0048] The correction value recording unit 431 obtains a second correction value, which is a correction value used to correct the first temperature, according to a second difference value (T1 - T2), which is a difference value between the first temperature (T1) and the second temperature (T2).

[0049] The correction value recording unit 431sets a second correction value such that in a range where the second difference value (T1 - T2) is equal to or greater than zero, the second correction value increases to the extent that the second difference value (T1 - T2) increases, and the rate of increase (slope) of the second correction value decreases to the extent that the second difference value (T1 - T2) increases.

[0050] At this point, the correction value acquisition unit obtains 431 for example, a second correction value (g(T1 - T2)) based on the second difference value (T1 - T2) with a second function g, which as in Fig. Figure 5 defines the relationship between the second difference value (T1 - T2) and the second correction value. The second function g is a function such that, in the interval where the second difference value (T1 - T2) is equal to or greater than zero, a first derivative g' is equal to or greater than zero and a second derivative g'' is equal to or less than zero. For example, if a body temperature or ambient temperature fluctuates, the body temperature or ambient temperature is in a transition state for approximately 10 to 20 minutes, so the transition properties of the second function g are corrected. For example, a logarithmic function, a square root function, or the like can be used as the second function g.

[0051] Maps (lookup tables) can be used instead of the functions f and g to capture correction values ​​(a first correction value and a second correction value). In other words, a map defining the relationship between the first difference value (T0 - T1) and the first correction value (that is, a first correction value map in which an associated first correction value is given for each grid point of the first difference value (T0 - T1)) can be pre-stored in the EEPROM or similar (the memory unit), and a first correction value can be obtained by looking up the first correction value map according to the first difference value (T0 - T1).

[0052] Similarly, a mapping defining the relationship between the second difference value (T1 - T2) and the second correction value (i.e., a second correction value mapping in which an associated second correction value is given for each grid point of the second difference value (T1 - T2)) can be pre-stored in the EEPROM or similar (the storage unit), and a second correction value can be obtained by looking up the second correction value mapping according to the second difference value (T1 - T2). The obtained correction values ​​(the first correction value and the second correction value) are then sent to the deep body temperature sensing unit. 432 issued.

[0053] The deep body temperature sensing unit 432A deep body temperature is obtained by correcting the first temperature (T1) using the first correction value (f(T0 - T1)) and the second correction value (g(T1 - T2)). In other words, the deep body temperature sensing unit functions 432 as a deep body temperature sensing unit, which is described in the claims. More precisely, the deep body temperature sensing unit calculates 432 a deep body temperature, for example, according to the following expression 1. Tiefkörpertemperatur = Erste Temperatur ( T 1 ) + Erster Korrekturwert ( f ( T 0 − T 1 ) ) × Zweiter Korrekturwert ( g ( T 1 − T 2 ) ) ( 1 )

[0054] Alternatively, the deep body temperature detection unit can be used. 432 attain a deep body temperature according to the following expression 2. Tiefkörpertemperatur = Erste Temperatur ( T 1 ) + Erster Korrekturwert ( f ( T 0 − T 1 ) ) × Zweiter Korrekturwert ( g ( T 1 − T 2 ) ) <?page 12=""?>

[0055] Here is an example of actual measured results in Fig. 6 shown. Fig. Figure 6 is a graphic illustrating an example of measurement results for a first temperature (T1), a second temperature (T2), a deep body temperature (estimated value), and an esophageal temperature. Fig. Figure 6 represents time on the abscissa axis and temperature (°C) on the ordinate axis. In the example from Fig. 6. Body temperature was increased by exposure to a high room temperature condition from 15 minutes to 1 hour 45 minutes and by running from 30 minutes to 1 hour. 30 The temperature was increased for several minutes and measured. In other words, the deep-body thermometer was used. 1 A device was attached to the body to take a measurement, while a temperature sensor was inserted through the nose into the esophagus to measure the esophageal temperature, recognized as deep body temperature. As in Fig. Figure 6 shows that even when the body temperature increases and the gap between the first temperature (T1) and the second temperature (T2) is narrow, the corrected deep body temperature (estimated value) and the esophageal temperature essentially agree, thus confirming that the correction works effectively.

[0056] Fig. Figure 7 shows a graph in which corresponding points of the deep body temperatures (estimated values) and the esophageal temperatures, which are in Fig. 6 are shown, are drawn. Fig. Figure 7 shows that the abscissa represents the esophageal temperature (°C) and the ordinate represents the estimated deep body temperature (°C). As in Fig. Figure 7 shows that the corrected deep body temperature (estimated value) and the esophageal temperature show a high phase-to-phase difference.

[0057] As described in detail above, according to the present embodiment, using the first difference value (T0 - T1) between the reference temperature (T0), which is predetermined according to a body limit temperature up to which the body temperature feedback mechanism functions, and the first temperature (T1) on the adhesive surface side (body surface side) as a parameter, the first difference value is reduced if, for example, the first temperature (body surface temperature) increases with an increase in thermal radiation from the body surface and consequently approaches a deep body temperature. In this case, measurement accuracy is improved by reducing the correction value.On the other hand, the first difference value increases if the initial temperature (body surface temperature) decreases due to a reduction in thermal radiation from the body surface, and consequently the body surface temperature deviates from the deep body temperature. In this case, measurement accuracy is improved by increasing the correction value. This allows for consideration of the physiological response associated with thermoregulation through sweating and blood flow, thus increasing the correlation with the actual body temperature. Therefore, a deep body temperature can be obtained with a high degree of accuracy using a relatively simple calculation.

[0058] According to the present embodiment, the second difference value (T1 - T2) correlates with heat flux, so that measurement accuracy is further improved by adding the second correction value (g(T1 - T2)). Furthermore, when moving to a location where the outside air temperature is sufficiently lower than the deep body temperature (for example, an outside air temperature of 20°C), the first temperature (T1) decreases under the influence of the outside air temperature. In this case, the heat flux increases, thus increasing the second difference value (T1 - T2). If rapid heat generation (increase in deep body temperature) occurs due to physical activity or the like, the heat flux increases, and the second difference value (T1 - T2) increases. If the second difference value (T1 - T2) is high, the second correction value (g(T1 - T2)) is increased to improve estimation accuracy.Furthermore, if the second function g is fixed to a function whose second derivative g'' ≤ 0, the second correction value (g(T1 - T2)) increases with an increase in the second difference value (T1 - T2); however, the influence of the case in which the second difference value (T1 - T2) increases excessively is prevented by a reduced rate of increase. (First modification of the first embodiment)

[0059] Next, a deep-body thermometer 1B is described according to a first modification of the first embodiment with reference to Fig. 8 described. Here, the description of components that are identical or analogous to those of the first embodiment described above is simplified or omitted, and mainly differences are described. Fig. Figure 8 is a block diagram illustrating the functional design of a processing unit. 41B, which is a component of the adhesive-type deep-body thermometer 1B according to the first modification of the first embodiment. The same reference numerals denote in Fig. 8 identical or analogous components to those of the first embodiment.

[0060] The deep-body thermometer 1B differs from the deep-body thermometer described above in this respect. 1 that the deep body thermometer 1B instead of the processing unit 41 the processing unit 41B exhibits. The processing unit 41B This differs from the processing unit described above. 41 that the processing unit 41B instead of the correction value recording unit 431 and the deep body temperature detection unit 432 a correction value recording unit 431B and a deep body temperature sensing unit 432BIts other features are identical or analogous to those of the deep-body thermometer. 1 , so a detailed description is omitted here.

[0061] The correction value recording unit 431B The first correction value (f(T0 - T1)) described above is obtained. A procedure for determining the first correction value (f(T0 - T1)) is as described above, so a detailed description is omitted here. The correction value acquisition unit 431B Instead of the second correction value (g(T1 - T2)) described above, a fourth correction value is recorded. More precisely, the correction value recording unit acquires a fourth correction value. 431Bfurthermore, a third correction value (partial correction value) is used to correct the second difference value (T1 - T2) according to a time change of the first temperature (T1) (difference value ΔT1), and a fourth correction value is obtained, which is used to correct the first temperature T1 according to a corrected second difference value, which is corrected using the third correction value (that is, according to the second difference value and the third correction value).

[0062] More precisely, the correction value acquisition unit 431Ba third correction value is set such that the third correction value (partial correction value) increases to the extent that the amount of increase per unit of time of the first temperature (T1) (difference value ΔT1) increases, and a fourth correction value is set such that the fourth correction value increases to the extent that a corrected second difference value, which is corrected using the third correction value, increases, and the rate of increase (slope) of the second correction value decreases to the extent that a corrected second difference value increases.

[0063] For example, the correction value acquisition unit obtains 431BFirst, a third correction value (k(ΔT1)) is calculated based on a time change of the first temperature (T1) (difference value ΔT1) with a third function k that defines the relationship between the time change of the first temperature (T1) (difference value ΔT1) and the third correction value (k(ΔT1)). The correction value acquisition unit then obtains 431B a fourth correction value (g(T1 - T2 + k(ΔT1))) starting from a corrected second difference value (T1 - T2 + k(ΔT1)) with a fourth function g which defines the ratio between the fourth correction value and the corrected second difference value (T1 - T2 + k(ΔT1)), which is corrected using the third correction value (k(ΔT1)).

[0064] Here, the third function k is a function that increases monotonically with an increase in the magnitude of the increase per unit time of the first temperature (T1) (difference value ΔT1). The third function k is effective at the start of the measurement when a temperature changes rapidly, for example, immediately after the deep-body thermometer is switched on. 1 It is adhered to the body surface and further improves measurement accuracy. The second function g described above can be used as the fourth function. In other words, the fourth function g is a function of which, in the interval where the corrected second difference value is equal to or greater than zero, a first derivative g' is equal to or greater than zero and a second derivative g'' is equal to or less than zero.

[0065] Furthermore, the deep body thermometer 1A heat capacity is introduced, resulting in a time lag between the first temperature (T1) and the second temperature (T2). Accuracy is further improved by adding a term ΔT1, which correlates with this time lag, to the expression. For example, if the outside air temperature increases, the heat flux from the outside air increases, causing the second temperature (T2) to rise first, followed by the first temperature (T1) (ΔT1 > 0). Consequently, the second difference value (T1 - T2) decreases. Although the deep body temperature remains unchanged, the estimated value decreases due to this reduction in the second difference value (T1 - T2). Therefore, a decrease in the estimated value is prevented by applying a correction according to ΔT1.The reason a time-dependent temperature change ΔT1 of the first temperature (T1) is used as a correction method is that the time-dependent temperature change increases as the rate of temperature change increases. This prevents a decrease in the accuracy of the deep body temperature (estimate). On the other hand, if the outside air temperature decreases, the heat flux from the outside air decreases, so first T2 decreases and then the first temperature (T1) decreases (ΔT1 < 0). For this reason, the second difference value (T1 - T2) increases. Although the deep body temperature remains unchanged, the estimated value increases due to the increase in the second difference value (T1 - T2). Therefore, an increase in the estimated value is prevented by applying a correction according to ΔT1.When body temperature increases, heat flux from the body surface increases, causing the first temperature (T1) to rise first (ΔT1 > 0) and then the second temperature (T2). This increases the second difference value (T1 - T2). However, since the deep body temperature rises first, even when considering an increase in the estimate due to an increase in the second difference value (T1 - T2), no significant deviation occurs. Conversely, when body temperature decreases, heat flux from the body surface decreases, so the first temperature (T1) decreases first (ΔT1 < 0) and then the second temperature (T2). This also reduces the second difference value (T1 - T2).Since the deep body temperature decreases first, no large deviation occurs even when a reduction in the estimate due to a reduction in the second difference value (T1 - T2) is taken into account.

[0066] Maps (lookup tables) can be used instead of the functions k and g to capture correction values ​​(a third correction value and a fourth correction value). In other words, a map defining the relationship between the time change of the first temperature (T1) (difference value ΔT1) and the third correction value (that is, a third correction value map in which an associated third correction value is given for each grid point of the time change of the first temperature (T1) (difference value ΔT1)) can be pre-stored in the EEPROM or similar (the storage unit), and a third correction value can be obtained by looking up the third correction value map according to the time change of the first temperature (T1) (difference value ΔT1).Similarly, a mapping defining the relationship between a corrected second difference value (T1 - T2 + k(ΔT1)) and a fourth correction value (that is, a fourth correction value mapping in which an associated fourth correction value is given for each grid point of the corrected second difference value (T1 - T2 + k(ΔT1))) can be pre-stored in the EEPROM or similar (the storage unit), and a fourth correction value can be obtained by looking up the fourth correction value mapping according to the corrected second difference value (T1 - T2 + k(ΔT3)). The obtained correction values ​​(the first correction value and the fourth correction value) are sent to the deep body temperature sensing unit. 432B issued.

[0067] The deep body temperature sensing unit 432BA deep body temperature is obtained by correcting the first temperature (T1) using the first correction value (f(T0 - T1)) and the fourth correction value (g(T1 - T2 + k(ΔT1))). For example, the deep body temperature sensing unit calculates 432B a deep body temperature, for example, according to the following expression 3. Tiefkörpertemperatur = Erste Temperatur ( T 1 ) + Erster Korrekturwert ( f ( T 0 − T 1 ) ) × Veiter Korrekturwert ( g ( T 1 − T 2 + k ( Δ T 1 ) ) )

[0068] Alternatively, the deep body temperature detection unit can be used. 432B attain a deep body temperature according to the following expression 4. Tiefkörpertemperatur = Erste Temperatur ( T 1 ) + Erster Korrekturwert ( f ( T 0 − T 1 ) ) × Zweiter Korrekturwert ( g ( T 1 − T 2 + ( Δ T 1 ) ) )

[0069] According to the present modification, measurement accuracy is improved by further considering the term ΔT1 with a correlation with a time shift between the first temperature (T1) and the second temperature (T2) (i.e., a delay in a temperature change), which is determined by the heat capacity of the deep-body thermometer. 1 is caused. (Second modification of the first embodiment)

[0070] Next, a deep-body thermometer 1C is described according to a second modification of the first embodiment with reference to Fig. 9 described. Here, the description of components that are identical or analogous to those of the first embodiment described above is simplified or omitted, and mainly differences are described. Fig. Figure 9 is a block diagram illustrating the functional design of a processing unit. 41C , which is a component of the deep-body thermometer 1C of the adhesive type according to the second modification of the first embodiment. The same reference numerals denote in Fig. 9 identical or analogous components to those of the first embodiment.

[0071] The deep-body thermometer 1C differs from the deep-body thermometer described above in this respect. 1that the deep body thermometer 1C instead of the processing unit 41 the processing unit 41C exhibits. The processing unit 41C This differs from the processing unit described above. 41 that the processing unit 41C instead of the correction value recording unit 431 and the deep body temperature detection unit 432 a correction value recording unit 431C and a deep body temperature sensing unit 432C Its other features are identical or analogous to those of the deep-body thermometer. 1 , so a detailed description is omitted here.

[0072] The correction value recording unit 431CThe first correction value (f(T0 - T1)) described above is obtained. A procedure for determining the first correction value (f(T0 - T1)) is as described above, so a detailed description is omitted here. The correction value acquisition unit 431C Instead of the second correction value (g(T1 - T2)) described above, a fifth correction value is recorded. More precisely, the correction value recording unit acquires a fifth correction value. 431C a fifth correction value, which is a correction value used to correct the first temperature T1, according to a third difference value (T0 - T2), which is a difference value between the reference temperature (T0) and the second temperature value (T2).

[0073] For example, the correction value acquisition unit 431Ca fifth correction value is set such that in a range where the third difference value (T0 - T2) is equal to or greater than zero, the fifth correction value increases to the extent that the third difference value (T0 - T2) increases, and the rate of increase (slope) of the fifth correction value decreases to the extent that the third difference value (T0 - T2) increases.

[0074] More precisely, the correction value acquisition unit obtains 431CA fifth correction value is derived from the third difference value (T0 - T2), with a fifth function g defining the relationship between the third difference value (T0 - T2) and the fifth correction value. The second function g described above can be used as the fifth function. In other words, the fifth function g is a function such that, in the interval where the third difference value (T0 - T2) is equal to or greater than zero, a first derivative g' is equal to or greater than zero and a second derivative g'' is equal to or less than zero.

[0075] A lookup table can be used instead of the function g to retrieve a correction value (a fifth correction value). In other words, a lookup table defining the relationship between the third difference value (T0 - T2) and the fifth correction value (that is, a fifth correction value lookup table in which an associated fifth correction value is given for each grid point of the third difference value (T0 - T2)) can be pre-stored in the EEPROM or similar (the memory unit), and a fifth correction value can be obtained by looking up the fifth correction value lookup table according to the third difference value (T0 - T2). The obtained correction values ​​(the first correction value and the fifth correction value) are then sent to the deep body temperature sensing unit. 432C issued.

[0076] The deep body temperature sensing unit 432CA deep body temperature is obtained by correcting the first temperature (T1) using the first correction value (f(T0 - T1)) and the fifth correction value (g(T0 - T2)). For example, the deep body temperature sensing unit calculates 432C a deep body temperature, for example, according to the following expression 5. Tiefkörpertemperatur = Erste Temperatur ( T 1 ) + Erster Korrekturwert ( f ( T 0 − T 1 ) ) × Fünfter Korrekturwert ( g ( T0 − T2))

[0077] Alternatively, the deep body temperature detection unit can be used. 432C attain a deep body temperature according to the following expression 6. Tiefkörpertemperatur = Erste Temperatur ( T 1 ) + Erster Korrekturwert ( f ( T 0 − T 1 ) ) × Fünfter Korrekturwert ( g ( T0 − T2)) <?page 16=""?>

[0078] According to the present modification, instead of the second difference value (T1 - T2), the third difference value (T0 - T2) is used, so that a deep body temperature can be accurately estimated even when a heat flux is small (that is, when a temperature difference between the first temperature (T1) and the second temperature (T2) is small). (Third modification of the first embodiment)

[0079] Next, a deep-body thermometer 1D is described according to a third modification of the first embodiment with reference to Fig. 10. Here, the description of components that are identical or analogous to those of the first embodiment described above is simplified or omitted, and mainly differences are described. Fig. Figure 10 is a block diagram illustrating the functional design of a processing unit. 41D , which is a component of the adhesive-type deep-body thermometer 1D according to the third modification of the first embodiment. The same reference numerals denote in Fig. 10 identical or analogous components to those of the first embodiment.

[0080] The 1D deep body thermometer differs from the deep body thermometer described above in this respect. 1that the deep body thermometer 1D instead of the processing unit 41 the processing unit 41D exhibits. The processing unit 41D This differs from the processing unit described above. 41 that the processing unit 41D instead of the correction value recording unit 431 and the deep body temperature detection unit 432 a correction value recording unit 431D and a deep body temperature sensing unit 432D Its other features are identical or analogous to those of the deep-body thermometer. 1 , so a detailed description is omitted here.

[0081] The correction value recording unit 431D Instead of the first correction value described above, a seventh correction value is obtained. More precisely, the correction value acquisition unit obtains a seventh correction value. 431DA sixth correction value (partial correction value) is used to correct the first difference value (T0 - T1) according to a time change in the first temperature (T1) (difference value ΔT1), and a seventh correction value is obtained, which is used to correct the first temperature according to a corrected first difference value, which is corrected using the sixth correction value (according to the first difference value and the sixth correction value). The correction value acquisition unit 431D Instead of the second correction value described above, it acquires a ninth correction value. More precisely, the correction value acquisition unit acquires 431Dan eighth correction value (partial correction value) which is used to correct the third difference value (T0 - T2) according to a time change of the second temperature (T2) (difference value ΔT2) and obtains a ninth correction value which is used to correct the first temperature according to a corrected third difference value which is corrected using the eighth correction value (according to the third difference value and the eighth correction value).

[0082] More precisely, the correction value acquisition unit 431DA sixth correction value is set such that the sixth correction value (partial correction value) increases to the extent that the amount of increase per unit of time of the first temperature (T1) (difference value ΔT1) increases, and a seventh correction value is set such that the seventh correction value increases to the extent that the corrected first difference value, which is corrected using the sixth correction value, increases, and the rate of increase (slope) of the seventh correction value increases to the extent that the corrected first difference value increases. More precisely, the correction value acquisition unit sets 431DAn eighth correction value is set such that the eighth correction value (partial correction value) increases to the extent that the amount of increase per unit of time of the second temperature (T2) (difference value ΔT2) increases, and a ninth correction value is set such that the ninth correction value increases to the extent that the corrected third difference value, which is corrected using the eighth correction value, increases, and the rate of increase (slope) of the ninth correction value decreases to the extent that the corrected third difference value increases.

[0083] For example, the correction value acquisition unit obtains 431DA sixth correction value (h(ΔT1)) is derived from a time change of the first temperature (T1) (difference value ΔT1) with a sixth function h, which defines the ratio between the time change of the first temperature (T1) (difference value ΔT1) and the sixth correction value (h(ΔT1)), and a seventh correction value (f(T0 - T1 + h(ΔT1))) is obtained from a corrected first difference value (T0 - T1 + h(ΔT1)) with a seventh function f, which defines the ratio between the seventh correction value and the corrected first difference value (T0 - T1 + h(ΔT1)), which is corrected using the sixth correction value (h(ΔT1)). The correction value acquisition unit 431Dobtains an eighth correction value (k(ΔT2)) starting from a time change of the second temperature (T2) (difference value ΔT2) with an eighth function k which defines the ratio between the time change of the second temperature (T2) (difference value ΔT2) and the eighth correction value (k(ΔT2)), and obtains a ninth correction value (g(T0 - T2 + k(ΔT2))) starting from a corrected third difference value with a ninth function g which defines the ratio between the ninth correction value and the corrected third difference value (T0 - T2 + k(ΔT2)), which is corrected using the eighth correction value (k(ΔT2)).

[0084] Here, the sixth function h is a function that increases monotonically with an increase in the magnitude of the increase per unit time of the first temperature (T1) (difference value ΔT1). Similarly, the eighth function k is a function that increases monotonically with an increase in the magnitude of the increase per unit time of the second temperature (T2) (difference value ΔT2). The first function f described above can be used as the seventh function. The second function g described above can be used as the ninth function.

[0085] Maps (lookup tables) can be used instead of the functions (arithmetic expressions) h and f to capture correction values ​​(the sixth and seventh correction values). In other words, a map defining the relationship between the time change of the first temperature (T1) (difference value ΔT1) and the sixth correction value (that is, a sixth correction value map in which an associated sixth correction value is given for each grid point of the time change of the first temperature (T1) (difference value ΔT1)) can be pre-stored in the EEPROM or similar (the storage unit), and a sixth correction value can be obtained by looking up the sixth correction value map according to the time change of the first temperature (T1) (difference value ΔT1).Similarly, a mapping defining the relationship between the corrected first difference value and the seventh correction value (that is, a seventh correction value mapping in which an associated seventh correction value is given for each grid point of the corrected first difference value) can be pre-stored in the EEPROM or the like (the storage unit), and a seventh correction value can be obtained by looking up the seventh correction value mapping according to a corrected first difference value.

[0086] Similarly, mappings (lookup tables) can be used instead of the functions (arithmetic expressions) k, g to capture correction values ​​(the eighth and ninth correction values). In other words, a mapping defining the relationship between the time change of the second temperature (T2) (difference value ΔT2) and the eighth correction value (that is, an eighth correction value mapping in which an associated eighth correction value is given for each grid point of the time change of the second temperature (T2) (difference value ΔT2)) can be pre-stored in the EEPROM or the like (the storage unit), and an eighth correction value can be obtained by looking up the eighth correction value mapping according to a time change of the second temperature (T2) (difference value ΔT2).Similarly, a mapping defining the relationship between the corrected third difference value and the ninth correction value (that is, a ninth correction value mapping in which an associated ninth correction value is given for each grid point of the corrected third difference value) can be pre-stored in the EEPROM or the like (the storage unit), and a ninth correction value can be obtained by looking up the ninth correction value mapping according to a corrected third difference value. The obtained correction values ​​(the seventh correction value and the ninth correction value) are sent to the deep body temperature sensing unit. 432D issued.

[0087] The deep body temperature sensing unit 432DA deep body temperature is obtained by correcting the first temperature (T1) using the seventh correction value (f(T0 - T1 + h(ΔT1))) and the ninth correction value (g(T0 - T2 + k(ΔT2))). For example, the deep body temperature sensing unit calculates 432D a deep body temperature, for example, according to the following expression 7. Tiefkörpertemperatur = Erste Temperatur ( T 1 ) + Seibter Korrekturwert ( f ( T 0 − T 1 + h ( Δ T 1 ) ) ) × Neuter Korrekturwert ( g ( T 0 − T2 + k ( Δ T2 ) ) )

[0088] Alternatively, the deep body temperature detection unit can be used. 432D attain a deep body temperature according to the following expression 8. Tiefkörpertemperatur = Erste Temperatur ( T 1 ) + Seibter Korrekturwert ( f ( T 0 − T 1 + h ( Δ T 1 ) ) ) × Neuter Korrekturwert ( g ( T 0 − T2 + k ( Δ T2 ) ) ) <?page 18=""?>

[0089] According to the present modification, measurement accuracy is improved by further considering the term ΔT2 with a correlation with a time shift between the first temperature (T1) and the second temperature (T2) (that is, a delay in a temperature change), which is determined by the heat capacity of the deep-body thermometer. 1is caused. Thus, a phase-to-phase with a deep body temperature is further increased. (Fourth modification of the first embodiment)

[0090] Next, a deep-body thermometer 1E is described according to a fourth modification of the first embodiment with reference to Fig. 11. Here, the description of components that are identical or analogous to those of the first embodiment described above is simplified or omitted, and mainly differences are described. Fig. Figure 11 is a block diagram illustrating the functional design of a processing unit. 41E , which is a component of the adhesive-type deep-body thermometer 1E according to the fourth modification of the first embodiment. The same reference numerals denote in Fig. 11 identical or analogous components to those of the first embodiment.

[0091] The deep-body thermometer 1E differs from the deep-body thermometer described above in this respect. 1 that the deep body thermometer 1E instead of the processing unit 41 the processing unit 41E exhibits. The processing unit 41E This differs from the processing unit described above. 41 that the processing unit 41E instead of the correction value recording unit 431 and the deep body temperature detection unit 432 a correction value recording unit 431E and a deep body temperature sensing unit 432E Its other features are identical or analogous to those of the deep-body thermometer. 1 , so a detailed description is omitted here.

[0092] The correction value recording unit 431EIt records the correction values ​​described above for each of two sensing units, that is, a sensing unit having the first thermal resistance. 301 , the first temperature sensor 701 (T1) and the second temperature sensor 702 (T2), and a sensing unit, comprising the second thermal resistance 302 , the third temperature sensor 703 (T3) and the fourth temperature sensor 704 (T4). Any of the correction values ​​(correction methods) described above can be applied. One way of obtaining the correction values ​​is as described above, so a detailed description is omitted here. The recorded correction values ​​are sent to the deep body temperature sensing unit. 432E issued.

[0093] The deep body temperature sensing unit 432ETwo temporary deep body temperatures (estimated values) are obtained using the correction values ​​for the respective two sensing units. Any of the deep body temperature methods described above can be used. The deep body temperature methods are as described above, so a detailed description is omitted here. The deep body temperature sensing unit 432E determines a deep body temperature according to the two temporary deep body temperatures and obtains the probability of the deep body temperature.

[0094] In other words, the deep body temperature sensing unit estimates 432EA deep body temperature is determined based on each of a set of the first temperature (T1) and the second temperature (T2) and a set of the third temperature (T3) and the fourth temperature (T4), and the probability of the deep body temperature is determined based on the deep body temperatures (estimates). Furthermore, the probability decreases if the adhesive condition is defective, for example, if the deep body thermometer 1 Because of a high amount of sweat or body hair, the sensor is not in close contact with the body surface, thus reducing the accuracy of the deep body temperature estimate. For this reason, the deep body temperature sensing unit calculates... 432ETwo estimated temperatures are compared, and it is determined that the probability of the estimated temperatures is low when the difference between the two is high. When the outside air temperature is lower than a body temperature (body surface temperature), that is, under normal circumstances, the temperature order T1 > T3 > T4 ≈ T2, so it can be determined that the probability is low when this order changes. For example, if T3 > T1 > T4 ≈ T2, the deep body temperature detection unit determines 432EThe probability of estimating the temperature using the first temperature (T1) and the second temperature (T2) is low. If the adhesive is insufficient and the deep-body thermometer 1E is not in close contact with the body surface, variations in the first temperature (T1) or the third temperature (T3) will increase over time. Therefore, it can be determined that the probability is low if a variation in the first temperature (T1) or the third temperature (T3) exceeds a predetermined value within a certain period. If the probability is determined to be low, it is desirable to contact a user or similar entity, for example, using the wireless communication unit. 403 to inform about this effect. It is equally desirable to provide information, for example, through a message on a control device, voice, vibration, or similar means. The deep body temperature sensing unit432E Improves the accuracy of estimated temperatures by processing two estimated values ​​and determining a single estimated temperature. This is because estimated temperatures decrease when the adhesive condition of the deep-body thermometer deteriorates. 1If the adhesion is deficient, it is desirable to select a higher of the two estimated temperatures. Alternatively, an average, a weighted average, or the like can also be used. If the outside air temperature is higher than the body temperature (body surface temperature), estimated temperatures increase if the adhesion is deficient, so a lower temperature is selected if the outside air temperature is higher than the body temperature (body surface temperature). Whether the outside air temperature is higher than the body temperature (body surface temperature) can be determined by adding a temperature sensor to measure the outside air temperature and is ideally determined depending on whether T1 - T2 is negative.

[0095] Here is an example of actual measured results in Fig. 13 shown. Fig. Figure 13 is a graphic illustrating an example of measurement results for a first temperature (T1), a second temperature (T2), a third temperature (T3), a fourth temperature (T4), a deep body temperature (estimated value), and an esophageal temperature. Fig. Figure 13 represents time on the abscissa axis and temperature (°C) on the ordinate axis. In the example from Fig. 13. Body temperature was increased by exposure to a high room temperature condition from 15 minutes to 1 hour 45 minutes and by running from 30 minutes to 1 hour. 30 Minutes were increased and the temperatures were measured. In other words, the deep-body thermometer 1E was attached to the body to take a measurement, while a temperature sensor was inserted through the nose into the esophagus to measure the esophageal temperature, which is recognized as deep-body temperature. As in Fig. Figure 13 shows that even when body temperature increases and the gap between the first temperature (T1) and the second temperature (T2) and the gap between the third temperature (T3) and the fourth temperature (T4) is narrow, the corrected deep body temperature (estimated value) and the esophageal temperature almost agree, thus confirming that a correction works effectively. Compared to the figures described above in Fig. 6 shown or (described below) in Fig. The measurement results shown in Figure 14 (especially the area marked by the dotted ellipse in the graph) confirm that the corrected deep body temperature (estimated value) and the esophageal temperature are almost identical.

[0096] According to the present modification, the probability of an estimated temperature can be determined by calculating two deep body temperatures (estimates) and comparing them. If the probability is low, a user can be notified. Furthermore, the estimation accuracy of a deep body temperature (estimated temperature) is improved by processing two estimates (for example, taking an average, a maximum value, a minimum value, or a weighted average) and determining the deep body temperature. (Second embodiment)

[0097] Next, a deep-body thermometer 1F according to a second embodiment is described with reference to Fig. 12 described. Here, the description of components that are identical or analogous to those of the first embodiment described above is simplified or omitted, and mainly differences are described. Fig. Figure 12 is a block diagram illustrating the functional design of a processing unit. 41F , which is a component of the deep-body thermometer 1F of the adhesive type according to the second embodiment. The same reference numerals denote in Fig. 12 identical or analogous components to those of the first embodiment.

[0098] The deep-body thermometer 1F measures a deep-body temperature based solely on the first temperature (T1). Therefore, the deep-body thermometer 1F differs from the deep-body thermometer described above in this respect. 1 that the deep body thermometer 1F instead of the processing unit 41 the processing unit 41Fexhibits. The processing unit 41F This differs from the processing unit described above. 41 that the processing unit 41F instead of the correction value recording unit 431 and the deep body temperature detection unit 432 a correction value recording unit 431F and a deep body temperature sensing unit 432F Its other features are identical or analogous to those of the deep-body thermometer. 1 , so a detailed description is omitted here.

[0099] The correction value recording unit 431Fobtains a first correction value, which is a correction value used to correct the first temperature, according to a first difference value (subtracted value), which is a difference value between the first temperature (T1) and a reference temperature (T0), which is predetermined according to a body limit temperature up to which the body temperature feedback mechanism of the body functions (for example, a maximum body temperature that a thermometer can detect).

[0100] In other words, the correction value acquisition unit functions 431F as a correction value acquisition unit, which is described in the claims.

[0101] The correction value recording unit 431FThe first correction value is set such that, in a range where the first difference value (T0 - T1) is equal to or greater than zero, the first correction value increases to the same extent as the first difference value (T0 - T1) increases, and the rate of increase (slope) of the first correction value increases to the same extent as the first difference value (T0 - T1) increases. The procedures for setting the reference temperature (T0) are as described above, so a detailed description is omitted here.

[0102] At this point, the correction value acquisition unit obtains 431FFor example, a first correction value based on the first difference value (T0 - T1) with a first function f that defines the relationship between the first difference value (T0 - T1) and the first correction value. As described above, the first function f is a function of which, in the interval where the first difference value (T0 - T1) is equal to or greater than zero, a first derivative f' is equal to or greater than zero and a second derivative f'' is equal to or greater than zero.

[0103] A mapping (lookup table) can be used instead of the function (arithmetic expression) f to retrieve a correction value (a first correction value). In other words, a mapping defining the relationship between the first difference value (T0 - T1) and the first correction value (that is, a first correction value mapping in which an associated first correction value is given for each grid point of the first difference value (T0 - T1)) can be pre-stored in the EEPROM or similar (the storage unit), and a first correction value can be obtained by looking up the first correction value mapping according to the first difference value (T0 - T1). The obtained first correction value is then sent to the deep body temperature sensing unit. 432F issued.

[0104] The deep body temperature sensing unit 432FThe deep body temperature is obtained (estimated) by correcting the first temperature (T1) using the first correction value (f(T0 - T1)). The deep body temperature sensing unit 432F It functions as a deep-body temperature sensing unit, which is described in the claims. For example, the deep-body temperature sensing unit calculates 432F a deep body temperature, for example, according to the following expression 9. Tiefkörpertemperatur = Erste Temperatur ( T 1 ) + Erster Korrekturwert (f(T0 - T1))

[0105] Here is an example of actual measured results in Fig. 14 shown. Fig. Figure 14 is a graphic illustrating an example of measurement results for a first temperature (T1), a deep body temperature (estimated value), and an esophageal temperature. Fig. Figure 14 represents time on the abscissa axis and temperature (°C) on the ordinate axis. In the example from Fig. 14. Body temperature was increased by exposure to a high room temperature condition from 15 minutes to 1 hour 45 minutes and by running from 30 minutes to 1 hour. 30 Minutes were increased and the temperatures were measured. In other words, the deep-body thermometer 1E was attached to the body to take a measurement, while a temperature sensor was inserted through the nose into the esophagus to measure the esophageal temperature, which is recognized as deep-body temperature. As in Fig. Figure 14 shows that even when body temperature increases, the corrected deep body temperature (estimated value) and the esophageal temperature essentially agree, thus confirming that the correction works effectively. Compared to the figures described above in Fig. The measurement results shown in Figure 13 confirm that, although a deviation in the area marked by the dotted ellipse in the graph increases slightly, the corrected deep body temperature (estimated value) and the esophageal temperature are essentially in agreement.

[0106] Fig. Figure 15 shows a graph in which corresponding points of the deep body temperatures (estimated values) and the esophageal temperatures, which are in Fig. 14 are shown, are drawn. Fig. 15 represents the esophageal temperature (°C) on the abscissa axis and the deep body temperature (estimated value) (°C) on the ordinate axis. As in Fig. Figure 15 shows that the corrected deep body temperature (estimated value) and the esophageal temperature show good phase-to-phase correlation.

[0107] According to the present embodiment, a physiological response associated with thermoregulation through sweating and blood flow can be taken into account, thus increasing the correlation with the actual deep body temperature. In this way, a deep body temperature is obtained with a high degree of accuracy through relatively simple calculation.

[0108] The embodiments of the present invention are described above; however, the present invention is not limited to the embodiments described above and can be modified in various ways. For example, in the first embodiment and the first to third modifications of the first embodiment, the second thermal resistance can be modified. 302 , the third temperature sensor 703 and the fourth temperature sensor 704 can be omitted. In the second embodiment, the second thermal resistor can be omitted. 302 , the first temperature sensor 701, the third temperature sensor 703 and the fourth temperature sensor 704 can be dispensed with.

[0109] The functions (arithmetic expressions) used for correction are not limited to those in the embodiments or modifications described above, and other functions (arithmetic expressions) may be used. For example, a cubic function, an exponential function, a sine function (0 to 45°), or the like may be used.

[0110] In the embodiments, processes such as the acquisition of correction values ​​and the calculation of deep body temperatures take place in the internal processing unit. 41 (Calculation processing unit) 43Alternatively, recorded temperature data can be wirelessly transmitted to an external server or mobile device (such as a smartphone), and calculations such as the acquisition of correction values ​​and the calculation of deep body temperatures can be performed on the server or mobile device. In such a case, data such as the functions, images, and the like described above are stored in the server's or mobile device's memory as a program library for calculations. Reference symbol list 1 deep body thermometer 10 upper outer body 15 Body temperature measuring unit 20 lower outer body 30 Thermal resistance layer 301 first thermal resistance 302 second thermal resistance 301a, 302a Through hole 40, 40F wiring substrate 41, 41B, 41C, 41D, 41E, 41F Processing unit (processing circuit) 42, 42F Temperature input unit (temperature input circuit) 43, 43B, 43C, 43D, 43E, 43F Computing unit (computational processing circuit) 431, 431B, 431C, 431D, 431E, 431F Correction value acquisition unit 432, 432B, 432C, 432D, 432E, 432F Deep Body Temperature Detection Unit 403 wireless communication unit 407 FPC connectors 50 flexible substrate 60 adhesive elements 601 first layer of adhesion 602 second adhesive layer 603 Ventilation layer 60a, 60b Through hole 701, 702, 703, 704 Temperature sensor 80 Lining element 80a Through hole 90 Shock absorber element 90a Through hole

Claims

[1] Deep-body thermometer of the adhesive type, which is glued to a living body to measure a deep-body temperature, wherein the deep-body thermometer of the adhesive type has: a thermal resistor with a predetermined thermal resistance; a first temperature detection unit which is arranged on one surface side of the thermal resistance and which detects a first temperature of an adhesive surface side; a correction value acquisition unit which obtains a first correction value, which is a correction value used to correct the first temperature, according to a first difference value, which is a difference value between the first temperature and a reference temperature, which is set to a temperature higher than the first temperature; and a deep body temperature sensing unit which obtains a deep body temperature by correcting the first temperature using the first correction value. [2] Deep body thermometer of the adhesive type according to claim 1, wherein the reference temperature is predetermined according to a body limit temperature up to which a body temperature feedback mechanism of a body functions. [3] Deep body thermometer of the adhesive type according to claim 1 or 2, wherein the correction value detection unit sets the first correction value such that in a range in which the first difference value is equal to or greater than zero, the first correction value increases to the extent that the first difference value increases, and an increase rate of the first correction value increases to the extent that the first difference value increases. [4] Deep-body thermometer of adhesive type according to any one of claims 1 to 3, wherein The correction value acquisition unit obtains the first correction value based on the first difference value using a first function that defines a ratio between the first difference value and the first correction value, and in a range where the first difference value is equal to or greater than zero, a first derivative of the first function is equal to or greater than zero, and a second derivative of the first function is equal to or greater than zero. [5] Deep-body thermometer of the adhesive type according to any one of claims 1 to 4, further comprising a second temperature detection unit, which is arranged on a different surface side of the thermal resistor and which detects a second temperature on a rear surface side, wherein The correction value acquisition unit further obtains a second correction value, which is a correction value used to correct the first temperature, according to a second difference value, which is a difference value between the first temperature and the second temperature, and the deep body temperature acquisition unit obtains a deep body temperature by correcting the first temperature using the first correction value and the second correction value. [6] Deep body thermometer of the adhesive type according to claim 5, wherein the correction value detection unit sets the second correction value such that in a range in which the second difference value is equal to or greater than zero, the second correction value increases to the extent that the second difference value increases, and the rate of increase of the second correction value decreases to the extent that the second difference value increases. [7] Deep body thermometer of the adhesive type according to claim 5 or 6, wherein The correction value acquisition unit obtains the second correction value from the second difference value using a second function that defines a ratio between the second difference value and the second correction value, and in a range where the second difference value is equal to or greater than zero, a first derivative of the second function is equal to or greater than zero, and a second derivative of the second function is equal to or less than zero. [8] Deep-body thermometer of adhesive type according to any one of claims 5 to 7, wherein The correction value acquisition unit further obtains a third correction value, which is used to correct the second difference value, according to a time change of the first temperature, and a fourth correction value, which is used to correct the first temperature, according to a corrected second difference value, which is corrected using the third correction value, and The deep body temperature sensing unit achieves a deep body temperature by correcting the first temperature using the first correction value and the fourth correction value. [9] Deep-body thermometer of the adhesive type according to claim 8, wherein the correction value detection unit sets the third correction value such that the third correction value increases to the extent that an increase amount per unit time of the first temperature increases, and sets the fourth correction value such that the fourth correction value increases to the extent that a corrected second difference value, which is corrected using the third correction value, increases, and an increase rate of the second correction value decreases to the extent that a corrected second difference value, which is corrected using the third correction value, increases. [10] Deep-body thermometer of the adhesive type according to claim 8 or 9, wherein The correction value acquisition unit obtains the third correction value from a time change of the first temperature using a third function that defines a ratio between a time change of the first temperature and the third correction value, and the fourth correction value from a corrected second difference value using a fourth function that defines a ratio between the fourth correction value and a corrected second difference value, which is corrected using the third correction value. The third function increases monotonically with an increase of an amount per unit of time of the first temperature, and in a range where the corrected second difference value is equal to or greater than zero, a first derivative of the fourth function is equal to or greater than zero, and a second derivative of the fourth function is equal to or less than zero. [11] Deep-body thermometer of the adhesive type according to claim 1 or 2, further comprising a second temperature detection unit which is arranged on another surface side of the thermal resistance and which detects a second temperature on a rear surface side, wherein The correction value acquisition unit further obtains a fifth correction value, which is a correction value used to correct the first temperature, according to a third difference value, which is a difference value between the reference temperature and the second temperature, and The deep body temperature sensing unit achieves a deep body temperature by correcting the first temperature using the first correction value and the fifth correction value. [12] Deep body thermometer of the adhesive type according to claim 11, wherein the correction value detection unit sets the fifth correction value such that in a range in which the third difference value is equal to or greater than zero, the fifth correction value increases to the extent that the third difference value increases, and the rate of increase of the fifth correction value decreases to the extent that the third difference value increases. [13] Deep-body thermometer of the adhesive type according to claim 11 or 12, wherein The correction value acquisition unit obtains the fifth correction value from the third difference value using a fifth function that defines a ratio between the third difference value and the fifth correction value, and in a range where the third difference value is equal to or greater than zero, a first derivative of the fifth function is equal to or greater than zero, and a second derivative of the fifth function is equal to or less than zero. [14] Deep-body thermometer of adhesive type according to any one of claims 11 to 13, wherein The correction value acquisition unit further obtains a sixth correction value, which is used to correct the first difference value according to a time change in the first temperature; a seventh correction value, which is used to correct the first temperature according to a corrected first difference value, which is corrected using the sixth correction value; furthermore, an eighth correction value, which is used to correct the third difference value, which is obtained according to a time change in the second temperature; and a ninth correction value, which is used to correct the first temperature according to a corrected third difference value, which is corrected using the eighth correction value. The deep body temperature sensing unit achieves a deep body temperature by correcting the first temperature using the seventh and ninth correction values. [15] Deep body thermometer of the adhesive type according to claim 14, wherein the correction value acquisition unit sets the sixth correction value such that the sixth correction value increases to the extent that an increase amount per unit of time of the first temperature increases, and sets the seventh correction value such that the seventh correction value increases to the extent that a corrected first difference value, which is corrected using the sixth correction value, increases, and an increase rate of the seventh correction value increases to the extent that a corrected first difference value, which is corrected using the sixth correction value, increases, and The correction value acquisition unit sets the eighth correction value such that the eighth correction value increases to the extent that an increase amount per unit of time of the second temperature increases, and sets the ninth correction value such that the ninth correction value increases to the extent that a corrected third difference value, which is corrected using the eighth correction value, increases, and an increase rate of the ninth correction value decreases to the extent that a corrected third difference value, which is corrected using the eighth correction value, increases. [16] Deep body thermometer of the adhesive type according to claim 14 or 15, wherein The correction value acquisition unit obtains the sixth correction value from a time change of the first temperature using a sixth function that defines a ratio between a time change of the first temperature and the sixth correction value, and the seventh correction value from a corrected first difference value, which is corrected using the sixth correction value, using a seventh function that defines a ratio between the seventh correction value and a corrected first difference value, which is corrected using the sixth correction value. The correction value acquisition unit obtains the eighth correction value based on a time change of the second temperature using an eighth function that defines a ratio between a time change of the second temperature and the eighth correction value, and the ninth correction value based on a corrected third difference value, which is corrected using the eighth correction value, using a ninth function that defines a ratio between the ninth correction value and a corrected third difference value, which is corrected using the eighth correction value. The sixth function increases monotonically with an increase of an amount per unit of time of the first temperature, and The eighth function increases monotonically with an increase of an increase amount per unit of time of the second temperature. [17] Deep-body thermometer of adhesive type according to any one of claims 5 to 16, wherein Two sensing units, each comprising the thermal resistance, the first temperature detection unit and the second temperature detection unit, are provided. the thermal resistances of the respective sensing units have different thermal resistance values, the correction value acquisition unit obtains the correction value for each of the two sensing units, and The deep body temperature sensing unit obtains two temporary deep body temperatures using the assigned correction values ​​for the respective two sensing units, obtains a deep body temperature according to the two temporary deep body temperatures, and obtains a probability of the deep body temperature.