WO2020184511A1 - 温度センサユニット及び体内温度計 - Google Patents
温度センサユニット及び体内温度計 Download PDFInfo
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- WO2020184511A1 WO2020184511A1 PCT/JP2020/010006 JP2020010006W WO2020184511A1 WO 2020184511 A1 WO2020184511 A1 WO 2020184511A1 JP 2020010006 W JP2020010006 W JP 2020010006W WO 2020184511 A1 WO2020184511 A1 WO 2020184511A1
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- measurement surface
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/01—Measuring temperature of body parts ; Diagnostic temperature sensing, e.g. for malignant or inflamed tissue
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/42—Circuits effecting compensation of thermal inertia; Circuits for predicting the stationary value of a temperature
- G01K7/427—Temperature calculation based on spatial modeling, e.g. spatial inter- or extrapolation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/16—Special arrangements for conducting heat from the object to the sensitive element
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/02—Means for indicating or recording specially adapted for thermometers
- G01K1/024—Means for indicating or recording specially adapted for thermometers for remote indication
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/16—Special arrangements for conducting heat from the object to the sensitive element
- G01K1/165—Special arrangements for conducting heat from the object to the sensitive element for application in zero heat flux sensors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
- G01K13/20—Clinical contact thermometers for use with humans or animals
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K17/00—Measuring quantity of heat
- G01K17/06—Measuring quantity of heat conveyed by flowing media, e.g. in heating systems e.g. the quantity of heat in a transporting medium, delivered to or consumed in an expenditure device
- G01K17/08—Measuring quantity of heat conveyed by flowing media, e.g. in heating systems e.g. the quantity of heat in a transporting medium, delivered to or consumed in an expenditure device based upon measurement of temperature difference or of a temperature
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K3/00—Thermometers giving results other than momentary value of temperature
- G01K3/005—Circuits arrangements for indicating a predetermined temperature
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
- G01K7/22—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
- G01K7/22—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor
- G01K7/24—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor in a specially-adapted circuit, e.g. bridge circuit
Definitions
- the present invention relates to a temperature sensor unit and an internal thermometer, particularly a temperature sensor unit and an internal thermometer that can be manufactured at low cost.
- a core thermometer that measures core body temperature using two heat flux sensors with temperature sensors (temperature measuring elements) attached to the upper and lower surfaces of thermal resistance (insulation material), which has a relatively large area.
- temperature sensors temperature measuring elements
- thermal resistance insulation material
- FIG. 4 (a) is a diagram illustrating a schematic configuration of a conventional deep thermometer
- FIG. 4 (b) is a diagram illustrating a heat equivalent circuit of a conventional deep thermometer.
- the first heat flux sensor 201 and the second heat flux sensor 202 are brought into close contact with the body surface of the subject.
- the thermal resistance value of the first thermal resistor 221 of the first thermal flux sensor 201 is R1
- the temperature measured by the first temperature sensor 211 on the upper surface of the first thermal resistor 221 is T1
- the second temperature on the lower surface Let T2 be the temperature measured by the sensor 212.
- the thermal resistance value of the second thermal resistor 222 of the second thermal flux sensor 202 is R2 ( ⁇ R1)
- the temperature measured by the third temperature sensor 213 on the upper surface of the second thermal resistor 222 is T3
- T4 be the temperature measured by the fourth temperature sensor 214.
- the core thermometer 200 shown in FIG. 4A can be represented by the heat equivalent circuit shown in FIG. 4B.
- the unknown numbers in the above equations (9) and (10) are the thermal resistance of the subcutaneous tissue 230. Only the values Rz and core body temperature Ti. Therefore, we solved the simultaneous equations for the unknown thermal resistance value Rz and core body temperature Ti of the subcutaneous tissue 230, and from equations (9) and (10), the thermal resistance value of the subcutaneous tissue 230, which varies from place to place and from individual to individual. If Rz is eliminated, the core body temperature Ti can be measured (calculated) relatively accurately.
- the present invention has been made to solve the above problems, and an object of the present invention is to provide a temperature sensor unit and an internal thermometer that can be manufactured at low cost.
- the temperature sensor unit (1) is used to measure the internal temperature of the object to be measured, and the measurement facing the body surface of the object to be measured.
- a temperature sensor unit (1) including a plurality of temperature sensors (111 to 114) for measuring the temperature of the body surface to be measured on the surface side, and is included in the plurality of temperature sensors (111 to 114).
- the first thermal resistor (121) is provided only on the measurement surface side of the first temperature sensor (111), and the first temperature sensor (111) And the second temperature sensor (112) are so close to each other that the temperature on the measurement surface side of the first thermal resistor (121) is substantially equal to the temperature measured by the second temperature sensor (112). It is characterized by being arranged.
- the first thermal resistor (121) is formed by attaching a heat insulating member (13) to the measurement surface side of the first temperature sensor (111). , Is preferable.
- a second thermal resistor (122) is provided only on the side, and the third temperature sensor (113) and the fourth temperature sensor (114) are the temperatures on the measurement surface side of the second thermal resistor (122).
- the second thermal resistor (122) is arranged so close that the temperature is substantially equal to the temperature measured by the fourth temperature sensor (114), and the second thermal resistor (122) is on the measurement surface side of the third temperature sensor (113).
- the heat insulating member (12, 13) is attached to the heat insulating member (12, 13) in a manner different from that of the first thermal resistor (121) so as to have a thermal resistance value different from that of the first thermal resistor (121). It may be something that has been done.
- the first temperature sensor (111) and the third temperature sensor (113) are more than the first temperature sensor (111) and the second temperature sensor (112). It is preferable that the third temperature sensor (113) and the fourth temperature sensor (114) are separated from each other and arranged more apart from each other.
- the measurement surface side of the plurality of temperature sensors (111 to 114) is covered with the heat conductive material (14).
- the temperature sensor unit (1001) is used to measure the internal temperature of the object to be measured, and the object to be measured is on the measurement surface side facing the body surface of the object to be measured.
- a temperature sensor unit (1001) including a plurality of temperature sensors (111 to 114) for measuring the temperature of the body surface of the body, and the first one included in the plurality of temperature sensors (111 to 114) on the measurement surface side. And of the second temperature sensors (111, 112), one end is connected to the first temperature sensor (111), and the other end is the temperature of the other end and the temperature measured by the second temperature sensor (112). It is characterized in that the conductor patterns (151) arranged so close to each other are formed so that they are substantially equal to each other.
- the measurement surface side of the second temperature sensor (112) and the other end of the conductor pattern (151) is covered with a heat conductive material (1014). ..
- the internal thermometer (100) is provided on the measurement surface side facing the body surface of the object to be measured, and is provided with a plurality of temperature sensors (a plurality of temperature sensors) for measuring the temperature of the body surface of the object to be measured. 111 to 114) and an internal temperature measuring unit (4) for measuring the internal temperature of the object to be measured based on the temperatures measured by the plurality of temperature sensors (111 to 114).
- the first thermal resistor (121) is provided only on the measurement surface side of the first temperature sensor (111).
- the temperature of the first temperature sensor (111) and the second temperature sensor (112) on the measurement surface side of the first thermal resistor (121) is measured by the second temperature sensor (112). It is characterized in that they are arranged so close that they are substantially equal to the temperature.
- the internal thermometer (100) may further include a warning unit (4) that issues a predetermined warning when the internal temperature of the object to be measured satisfies a predetermined condition.
- thermometer unit and an internal thermometer that can be manufactured at low cost.
- FIG. 1 It is a block diagram which illustrates the whole structure of a core thermometer.
- A is a cross-sectional view showing a configuration example of a temperature sensor unit, and (b) is a diagram illustrating a measurement surface of core body temperature.
- A is a diagram illustrating the schematic configuration of the temperature sensor unit, and (b) is a diagram illustrating the heat equivalent circuit of the temperature sensor unit.
- A) is a diagram illustrating the schematic configuration of a conventional deep thermometer, and (b) is a diagram illustrating a heat equivalent circuit of a conventional deep thermometer.
- A) is a cross-sectional view showing a configuration example of a temperature sensor unit in a modified example, and (b) is a diagram illustrating a measurement surface of core body temperature.
- the deep thermometer according to the present embodiment is attached to the body surface of a central part such as the head or trunk of the subject to be measured, obtains the heat flow from the deep part such as the brain or organs, and obtains the heat flow from the deep part of the body. It measures core body temperature, which is the temperature.
- the measurement of the body temperature in the present invention includes not only the measurement of the body temperature itself but also the estimation of the body temperature and the detection of the change in the body temperature.
- FIG. 1 is a block diagram showing a configuration example of a core thermometer.
- the core thermometer 100 includes a temperature sensor unit 1, an amplification unit 2, an analog-digital conversion unit 3, and a core body temperature measurement unit (body temperature measurement unit) 4.
- FIG. 2A is a cross-sectional view showing a configuration example of the temperature sensor unit
- FIG. 2B is a diagram illustrating a measurement surface of core body temperature.
- the temperature sensor unit 1 is located on the measurement surface side in a resin case (not shown), which is in contact with the body surface of the subject and measures the core body temperature.
- a substrate 11 on which four first to fourth temperature sensors 111 to 114 are mounted, a first heat insulating member 12, a second heat insulating member 13, and a heat conductive material 14 are provided.
- the substrate 11 is made of a material having insulating properties and heat insulating properties such as polyimide, and in the present embodiment, it is a flexible substrate (film substrate) having flexibility formed in a flat plate shape of 8 mm ⁇ 10 mm.
- the substrate 11 is not limited to the deformable flexible substrate, and may be a non-deformable printed circuit board.
- the first and second heat insulating members 12 and 13 function as thermal resistors having a predetermined thermal resistance value, and are made of a heat insulating material such as polyimide.
- the first and second heat insulating members 12 and 13 are formed into a thin seal having a thickness of about 0.01 mm so as to have flexibility so as to follow the shape and movement of the body surface of the subject. It is formed.
- the shapes of the first and second heat insulating members 12 and 13 are not limited to a rectangle, and may be, for example, a circle.
- the materials of the first and second heat insulating members 12 and 13 are not limited to polyimide, and any material having heat insulating properties may be used, for example, polyethylene foam or urethane foam. Good.
- the first heat insulating member 12 is attached so as to cover the entire third temperature sensor 113. Further, the second heat insulating member 13 is attached so as to cover both the first temperature sensor 111 and the third temperature sensor 113 to which the first heat insulating member 12 is attached.
- the heat conductive material 14 is composed of a substance having a higher thermal conductivity than that of the subject, such as a metal material such as aluminum, and is formed in a flat plate shape or a film shape.
- the heat conductive material 14 enables the first to fourth temperature sensors 111 to 114 to measure the temperature of the body surface of the subject through the resin case. Further, the heat conductive material 14 is provided so as to cover the entire first to fourth temperature sensors 111 to 114 in order to uniformly conduct heat to the four first to fourth temperature sensors 111 to 114.
- the first to fourth temperature sensors 111 to 114 measure the temperature of the body surface of the subject, and are composed of, for example, a thermistor whose resistance value changes depending on the temperature. In the present embodiment, since it is preferable that the heat capacity is as small as possible from the viewpoint of enhancing the responsiveness, chip thermistors are used as the first to fourth temperature sensors 111 to 114.
- the first to fourth temperature sensors 111 to 114 may be composed of a Peltier element, a thermocouple, a thermopile, or the like.
- the first to fourth temperature sensors 111 to 114 are electrically connected to the core body temperature measuring unit 4 via the first to fourth printed wirings 141 to 144, respectively.
- the first to fourth temperature sensors 111 to 114 output electric signals (voltage values) indicating the measured temperatures via the first to fourth printed wirings 141 to 144, respectively.
- a which is the distance between the first temperature sensor 111 and the second temperature sensor 112 and the distance between the third temperature sensor 113 and the fourth temperature sensor 114, is the first temperature sensor 111. It is shorter than b (b> a), which is the distance between the third temperature sensor 113 and the third temperature sensor 113 and the distance between the second temperature sensor 112 and the fourth temperature sensor 114. That is, in the present embodiment, the first temperature sensor 111 is arranged close to the second temperature sensor 112, while being arranged apart from the third temperature sensor 113. The third temperature sensor 113 is arranged close to the fourth temperature sensor 114, while being arranged away from the first temperature sensor 111.
- the amplification unit 2 shown in FIG. 1 is composed of, for example, four general-purpose amplifiers and the like, and amplifies and outputs electric signals input from the first to fourth temperature sensors 111 to 114, respectively.
- the analog-to-digital converter 3 is composed of, for example, four general-purpose A / D (Analog-to-digital) converters (ADCs), and the analog electric signal input from the amplification unit 2 is converted into a digital electric signal. Convert to and output.
- ADCs Analog-to-digital converters
- the core body temperature measuring unit 4 is composed of, for example, an MCU (MicroControlUnit) or the like, and is connected to a speaker, an LED (LightEmittingDiode) or the like.
- the core body temperature measuring unit 4 measures the core body temperature by obtaining the heat flow rate from the deep part of the subject based on the temperature indicated by the electric signal input from the analog-digital conversion unit 3. In the present embodiment, the core body temperature measuring unit 4 determines whether or not the subject is at risk of heat stroke from the transition of the core body temperature.
- the core body temperature measuring unit 4 satisfies a predetermined condition such as when the core body temperature exceeds a predetermined threshold value (danger value) or when the change in the core body temperature exceeds a predetermined range, there is a risk of heat stroke. If it is determined to be present, a warning sound is emitted from the speaker, or the LED is turned on or blinks to warn the subject that there is a risk of heat stroke.
- a predetermined threshold value e.g., a predetermined threshold value (danger value) or when the change in the core body temperature exceeds a predetermined range
- FIG. 3A is a diagram illustrating a schematic configuration of a temperature sensor unit
- FIG. 3B is a diagram illustrating a heat equivalent circuit of the temperature sensor unit.
- the first to fourth temperature sensors 111 to 114 are brought into close contact with the body surface of the subject via the measurement surface.
- the second heat insulating member 13 attached on the first temperature sensor 111 functions as a first thermal resistor 121 having a predetermined thermal resistance value R1.
- the first and second heat insulating members 12 and 13 attached on the third temperature sensor 113 have a thermal resistance larger than the thermal resistance value R1 of the first thermal resistor 121. It functions as a second thermal resistor 122 having a resistance value of R2 (> R1).
- the thermal resistance value R1 and the thermal resistance value R2 are known numbers obtained from the materials and thicknesses of the first and second heat insulating members 12 and 13, and are held by the core body temperature measuring unit 4 shown in FIG. ..
- the first temperature sensor 111 measures the temperature T1 on the upper surface of the first thermal resistor 121 and outputs an electric signal indicating the measured temperature T1.
- the second temperature sensor 112 outputs an electric signal indicating the measured temperature T2.
- the third temperature sensor 113 measures the temperature T3 on the upper surface of the second thermal resistor 122 and outputs an electric signal indicating the measured temperature T3.
- the fourth temperature sensor 114 outputs an electric signal indicating the measured temperature T4.
- the temperature sensor unit 1 shown in FIG. 3A can be represented by the heat equivalent circuit shown in FIG. 3B.
- the amount of heat (heat flux) passing through the first thermal resistor 121 per unit time and the subcutaneous surface of the subject The heat flux from the structure 130 to the lower surface of the first thermal resistor 121 is equal. Further, when the temperature T3 on the upper surface of the second thermal resistor 122 and the temperature T4'on the lower surface (measurement surface side) become stable, the heat flux of the second thermal resistor 122 and the second heat from the subcutaneous tissue 130 of the subject are obtained. Is equal to the heat flux to the underside of the resistor 122.
- the second temperature sensor 112 since the second temperature sensor 112 is not connected in series with the first thermal resistor 121, the lower surface (measurement) of the second temperature sensor 112 from the subcutaneous tissue 130 of the subject. The heat flux to the surface side) is different from the heat flux of the first thermal resistor 121. Further, since the fourth temperature sensor 114 is not connected in series with the second thermal resistor 122, the heat flux from the subcutaneous tissue 130 of the subject to the lower surface (measurement surface side) of the fourth temperature sensor 114 is It is different from the heat flux of the second thermal resistor 122.
- the temperature T2'on the lower surface of the first thermal resistor 121 is set by the second temperature sensor 112. It is substantially equal to the temperature T2 to be measured. Further, since the third temperature sensor 113 and the fourth temperature sensor 114 are installed close to each other, the temperature T4'on the lower surface of the second thermal resistor 122 is the temperature T4 measured by the fourth temperature sensor 114. Approximately equal. Therefore, the following equation (3) is established for the first thermal resistor 121, and the following equation (4) is established for the second thermal resistor 122. T2' ⁇ T2 ... (3) T4' ⁇ T4 ... (4)
- the equation (5) is the equation (9) established for the first heat flux sensor 201 of the conventional deep thermometer 200, and the equation (6) is established for the second heat flux sensor 202. , Each equal.
- the first temperature sensor 111, the second temperature sensor 112, and the first thermal resistor 121 can perform substantially the same functions as the first heat flux sensor 201 having a sandwich structure in the conventional deep thermometer 200. Further, the third temperature sensor 113, the fourth temperature sensor 114, and the second thermal resistor 122 can perform substantially the same functions as the second heat flux sensor 202 having a sandwich structure.
- the first temperature sensor 111 is arranged close to the second temperature sensor 112, and the third temperature sensor 113 and the third temperature sensor 113. Are preferably arranged apart from each other.
- the third temperature sensor 113 is arranged close to the fourth temperature sensor 114, and the first temperature sensor 113. It is preferable that they are arranged apart from 111. That is, as illustrated in FIG. 2B, the first temperature sensor 111 and the third temperature sensor 113 are separated from the first temperature sensor 111 and the second temperature sensor 112, and the third temperature sensor 113 is separated from each other.
- the fourth temperature sensor 114 are more preferably arranged apart from each other.
- the unknown numbers in the above equations (5) and (6) are the thermal resistance of the subcutaneous tissue 130. Only the values Rz and core body temperature Ti. Therefore, we solved the simultaneous equations for the unknown thermal resistance value Rz and core body temperature Ti of the subcutaneous tissue 130, and from equations (5) and (6), the thermal resistance value of the subcutaneous tissue 130, which varies depending on the location and individual. By eliminating Rz, the following equation (7) can be obtained.
- K R1 / R2 is defined, it can be simplified as in the following equation (8). As described above, since the thermal resistance value R1 and the thermal resistance value R2 are known numbers, K is also a known number and is held by the core body temperature measuring unit 4 shown in FIG.
- the core body temperature measuring unit 4 shown in FIG. 1 substitutes the temperatures T1 to T4 indicated by the temperature signals input from the first to fourth temperature sensors 111 to 114 into the equations (7) and (8), respectively.
- the core body temperature Ti can be measured (calculated) relatively accurately.
- the deep body thermometer (internal thermometer) 100 includes a temperature sensor unit 1 and a deep body temperature measuring unit (internal temperature measuring unit) 4.
- the temperature sensor unit 1 is used to measure the core body temperature Ti as the body temperature of the subject.
- the temperature sensor unit 1 includes first to fourth temperature sensors 111 to 114 for measuring the temperature of the body surface of the subject on the measurement surface side facing the body surface of the subject.
- the first thermal resistor 121 is provided only on the measurement surface side of the first temperature sensor 111.
- the first temperature sensor 111 and the second temperature sensor 112 are so close to each other that the temperature T2'on the measurement surface side of the first thermal resistor 111 is substantially equal to the temperature T2 measured by the second temperature sensor 112. Is arranged.
- the first temperature sensor 111, the second temperature sensor 112, and the first thermal resistor 121 can perform substantially the same functions as the first heat flux sensor 201 of the conventional deep thermometer 200.
- the temperature sensor unit 1 is provided with the first temperature sensor 111, the second temperature sensor 112, and the first heat resistor 121 without providing the first heat flux sensor 201 having a sandwich structure, which has a high manufacturing cost. Since it is possible to realize substantially the same function as the 1 heat flux sensor 201, it can be manufactured at a lower cost than before.
- the first thermal resistor 121 can be formed by a simple method such as attaching the second heat insulating member 13 to the measurement surface side of the first temperature sensor 111, the manufacturing cost can be further reduced.
- the second thermal resistor 122 is provided only on the measurement surface side of the third temperature sensor 113.
- the third temperature sensor 113 and the fourth temperature sensor 114 are so close to each other that the temperature T4'on the measurement surface side of the second thermal resistor 112 is substantially equal to the temperature T4 measured by the fourth temperature sensor 114. Is arranged.
- the heat insulating member is laminated on the measurement surface side of the third temperature sensor 113 in a mode different from that of the first thermal resistance body 121, specifically, the first and second heat insulating members 12 and 13. It is formed so as to have a thermal resistance value different from that of the first thermal resistor 121.
- the first and the thermal resistors 121 and 122 having different thermal resistance values can be formed by a simple method, so that the manufacturing cost can be further reduced.
- first temperature sensor 111 and the third temperature sensor 113 are separated from the first temperature sensor 111 and the second temperature sensor 112, and further separated from the third temperature sensor 113 and the fourth temperature sensor 114. Is arranged.
- the first temperature sensor 111, the second temperature sensor 112, and the first thermal resistor 121 can more preferably perform substantially the same functions as the first heat flux sensor 201.
- the third temperature sensor 113, the fourth temperature sensor 114, and the second thermal resistor 122 can more preferably perform substantially the same functions as the second heat flux sensor 202.
- the measurement surface side of the first to fourth temperature sensors 111 to 114 is covered with the heat conductive material 14.
- the first to fourth temperature sensors 111 to 114 can measure the temperature of the body surface of the subject through the resin case. Further, heat can be uniformly conducted to the four first to fourth temperature sensors 111 to 114.
- the core body temperature measuring unit 4 measures the core body temperature of the subject based on the temperatures measured by the first to fourth temperature sensors 111 to 114. Then, the core thermometer 100 includes a speaker and an LED that issue a predetermined warning as there is a risk of heat stroke when the core body temperature of the subject satisfies a predetermined condition. As a result, it is possible to prevent the subject from suffering from heat stroke.
- the object to be measured has been described as a subject, that is, a human being, but the present invention is not limited to this, and the object to be measured may be an animal.
- the temperature sensor unit 1 has been described as being in contact with the body surface of the subject to measure the core body temperature.
- the present invention is not limited to this, and the core body temperature may be measured without contacting (non-contacting) the body surface of the subject.
- the core thermometer 100 has been described as issuing a predetermined warning as there is a risk of heat stroke when the core body temperature of the subject satisfies a predetermined condition.
- the present invention is not limited to this, and even if it warns that there is a risk of physical and mental changes other than heat stroke when the core body temperature of the subject satisfies a predetermined condition. It is often arbitrary as long as it is a mental and physical abnormality related to core body temperature, and may be, for example, hypothermia, sleep quality, basal body temperature, immunity, stress, and the like.
- the thermometer is attached to the body surface of a central part such as the head or trunk of the subject to be measured, and at a deep internal temperature such as a brain or an organ.
- a core thermometer 100 for measuring a certain core body temperature Ti has been illustrated and described.
- the internal thermometer according to the present invention is not limited to this, and may be attached to a body other than the trunk to measure (including estimation) the internal temperature other than the core body temperature Ti.
- the internal thermometer according to the present invention may be attached to the terminal portion away from the trunk such as the arm or ankle of the subject to measure (including estimation) the internal temperature of the terminal portion. Good.
- the core body temperature measuring unit 4 may estimate the core body temperature Ti from the body temperature of the terminal portion of the subject. Specifically, a plurality of body temperatures at the terminal portion of the subject and a core body temperature at the central portion may be measured in advance to obtain a correlation between the two, and this may be held in the core body temperature measuring unit 4. Then, the core body temperature measuring unit 4 may estimate the core body temperature Ti from the measured body temperature of the terminal portion of the subject by using the correlation obtained in advance. For example, when a correlation is found that the core body temperature Ti is approximately 5 ° C higher than the body temperature at the end, if the measured body temperature at the end of the subject is 32 ° C, a constant of 5 ° C is added. Then, 37 ° C. may be estimated as the core body temperature Ti. Then, the core body temperature measuring unit 4 may warn the subject that there is a risk of heat stroke when a predetermined condition is satisfied, such as when the estimated core body temperature exceeds a predetermined threshold value.
- the first thermal resistance body 121 has the second heat insulating member 13 attached to the measurement surface side of the first temperature sensor 111, and the second thermal resistance body 122 is on the measurement surface side of the third temperature sensor 113.
- the first and second heat insulating members 12 and 13 have been described as being formed by being laminated on top of each other.
- the present invention is not limited to this, and the first and second thermal resistors 121 and 122 may be realized by patterned wiring formed on a printed circuit board (PCB).
- PCB printed circuit board
- FIG. 5A is a cross-sectional view showing a configuration example of a temperature sensor unit in a modified example
- FIG. 5B is a diagram illustrating a measurement surface of core body temperature.
- the same components as those of the temperature sensor unit 1 according to the above embodiment are designated by the same reference numerals, and the description thereof will be omitted.
- the temperature sensor unit 1001 in this modification measures the core body temperature in contact with the body surface of the subject in a resin case (not shown).
- the first and second pattern wirings 151 and 152 are formed on the printed circuit board 1011 only for the purpose of heat conduction.
- the first and second pattern wirings 151 and 152 are made of a thermal conductor such as copper foil having excellent thermal conductivity.
- connection end One end (hereinafter, referred to as “connection end”) of the first pattern wiring 151 is connected to the first temperature sensor 111, while the other end (hereinafter, “non-connection end”) is the second temperature sensor. It is located close to 112.
- connection end One end (hereinafter, referred to as “connection end”) of the second pattern wiring 152 is connected to the third temperature sensor 113, while the other end (hereinafter, referred to as “non-connection end”) is the fourth temperature sensor. It is located close to 114.
- c which is the distance between the second temperature sensor 112 and the first pattern wiring 151 and the distance between the fourth temperature sensor 114 and the second pattern wiring 152, is the first pattern wiring 151. It is shorter than d (d> c), which is the distance between and the second pattern wiring 152. That is, in this modification, the first pattern wiring 151 is arranged close to the second temperature sensor 112, while being arranged apart from the second pattern wiring 152 and further to the fourth temperature sensor 114. There is. The second pattern wiring 152 is arranged close to the fourth temperature sensor 114, while being arranged away from the first pattern wiring 151 and further to the second temperature sensor 112.
- the heat conductive material 1014 is the second and fourth temperature sensors 112 and 114, and the second and fourth so as to evenly conduct heat to the non-connected ends of the first and second pattern wirings 151 and 152. It is provided so as to cover the entire temperature sensors 112 and 114 and the non-connecting ends of the first and second pattern wirings 151 and 152.
- the first pattern wiring 151 has the same function as the first thermal resistor 121 in the above embodiment having the thermal resistance value R1.
- the second pattern wiring 152 has the same function as the second thermal resistor 122 in the above embodiment having the thermal resistance value R2 (> R1).
- the thermal resistance values of the first and second pattern wirings 151 and 152 are the distances (lengths) from the heat conductive material 1014 to the second and fourth temperature sensors 112 and 114, respectively, and the first and second pattern wirings 151 and It is determined by the thickness (width) of 152.
- the distance (length) from the heat conductive material 1014 to the second temperature sensor 112 and the distance (length) from the heat conductive material 1014 to the fourth temperature sensor 114 are the same, while being the same.
- the thermal resistance value R2 of the second pattern wiring 152 can be changed to the heat of the first pattern wiring 151. It is made larger than the resistance value R1.
- the temperature T2'of the non-connected end of the first wiring pattern 151 is the second temperature. It is substantially equal to the temperature T2 measured by the sensor 112. Further, since the non-connected end of the second wiring pattern 152 and the fourth temperature sensor 114 are installed close to each other, the temperature T4'of the non-connected end of the first wiring pattern 151 is set by the fourth temperature sensor 114. It is substantially equal to the temperature T4 to be measured. Therefore, also in this modified example, the equations (3) and (4) are satisfied, respectively, as in the above embodiment.
- the first temperature sensor 111, the second temperature sensor 112, and the first wiring pattern 151 can perform substantially the same functions as the first heat flux sensor 201 having a sandwich structure in the conventional deep thermometer 200. Further, the third temperature sensor 113, the fourth temperature sensor 114, and the second wiring pattern 152 can perform substantially the same functions as the second heat flux sensor 202 having a sandwich structure.
- the temperature sensor unit 1001 As described above, in the temperature sensor unit 1001 according to the present modification, one end is connected to the first temperature sensor 111 on the measurement surface side, and the other end measures the temperature of the other end and the second temperature sensor 112.
- the first wiring pattern 151 which is a conductor pattern arranged close to each other, is formed so that the temperature is substantially equal to that of the temperature. Further, the measurement surface side of the second temperature sensor 112 and the other end of the first wiring pattern 151 is covered with the heat conductive material 1014.
- the first temperature sensor 111, the second temperature sensor 112, and the first wiring pattern 151 perform substantially the same functions as the first heat flux sensor 201 of the conventional deep thermometer 200, as in the above embodiment. Can be done. Further, in the method of attaching a heat insulating member to the measurement surface side of the temperature sensor to form a thermal resistance body as in the above embodiment, the heat insulating member cannot be attached by an automatic process and requires manual work by a person. As a result, there is a problem that an error occurs in the thermal resistance value and that cost reduction by mass production cannot be expected due to manual work.
- the quality stability during mass production is improved because it can be done in an automatic process without the need for manual work by humans. At the same time, it is possible to reduce the cost.
- Temperature sensor unit 2 Amplification unit 3 Analog-to-digital conversion unit 4 Deep body temperature measurement unit (body temperature measurement unit) 11 Substrate 12 1st heat insulating member 13 2nd heat insulating member 14 Heat conductive material 100 Deep thermometer (internal thermometer) 111 1st temperature sensor 112 2nd temperature sensor 113 3rd temperature sensor 114 4th temperature sensor 121 1st thermal resistor 122 2nd thermal resistor 130 Subcutaneous tissue 141 1st printed wiring 142 2nd printed wiring 143 3rd printed wiring 144 4th printed wiring 151 1st pattern wiring 152 2nd pattern wiring
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Abstract
Description
(Ti-T2)/Rz=(T2-T1)/R1 …(9)
(Ti-T4)/Rz=(T4-T3)/R2 …(10)
(Ti-T2’)/Rz=(T2’-T1)/R1 …(1)
(Ti-T4’)/Rz=(T4’-T3)/R2 …(2)
T2’≒T2 …(3)
T4’≒T4 …(4)
(Ti-T2)/Rz=(T2-T1)/R1 …(5)
(Ti-T4)/Rz=(T4-T3)/R2 …(6)
2 増幅部
3 アナログ-デジタル変換部
4 深部体温測定部(体内温度測定部)
11 基板
12 第1断熱部材
13 第2断熱部材
14 熱伝導材
100 深部体温計(体内温度計)
111 第1温度センサ
112 第2温度センサ
113 第3温度センサ
114 第4温度センサ
121 第1熱抵抗体
122 第2熱抵抗体
130 皮下組織
141 第1プリント配線
142 第2プリント配線
143 第3プリント配線
144 第4プリント配線
151 第1パターン配線
152 第2パターン配線
Claims (9)
- 被測定対象の体内温度を測定するために用いられ、該被測定対象の体表面に面する測定面側に、該被測定対象の体表面の温度を測定する複数の温度センサ(111~114)を備える温度センサユニット(1)であって、
前記複数の温度センサ(111~114)に含まれる第1及び第2温度センサ(111,112)のうち、該第1温度センサ(111)の前記測定面側にのみ第1熱抵抗体(121)が設けられ、
前記第1温度センサ(111)と前記第2温度センサ(112)とは、前記第1熱抵抗体(121)の測定面側の温度が、前記第2温度センサ(112)が測定する温度と略等しくなる程、近接して配置されている、
ことを特徴とする温度センサユニット(1)。 - 前記第1熱抵抗体(121)は、該第1温度センサ(111)の前記測定面側に断熱部材(13)を貼り付けることにより、形成されている、
ことを特徴とする請求項1に記載の温度センサユニット(1)。 - 前記複数の温度センサ(111~114)に含まれる第3及び第4温度センサ(113,114)のうち、該第3温度センサ(113)の前記測定面側にのみ第2熱抵抗体(122)が設けられ、
前記第3温度センサ(113)と前記第4温度センサ(114)とは、前記第2熱抵抗体(122)の測定面側の温度が、前記第4温度センサ(114)が測定する温度と略等しくなる程、近接して配置され、
前記第2熱抵抗体(122)は、該第3温度センサ(113)の前記測定面側に前記断熱部材(12,13)を、前記第1熱抵抗体(121)とは異なる態様で貼り付けることにより、該第1熱抵抗体(121)とは異なる熱抵抗値を有するように形成されている、
ことを特徴とする請求項2に記載の温度センサユニット(1)。 - 前記第1温度センサ(111)と前記第3温度センサ(113)とは、前記第1温度センサ(111)と前記第2温度センサ(112)とよりも離間し、且つ前記第3温度センサ(113)と前記第4温度センサ(114)とよりも離間して配置されている、
ことを特徴とする請求項3に記載の温度センサユニット(1)。 - 前記複数の温度センサ(111~114)は、前記測定面側が熱伝導材(14)で覆われている、
ことを特徴とする請求項1に記載の温度センサユニット(1)。 - 被測定対象の体内温度を測定するために用いられ、該被測定対象の体表面に面する測定面側に、該被測定対象の体表面の温度を測定する複数の温度センサ(111~114)を備える温度センサユニット(1001)であって、
前記測定面側に、前記複数の温度センサ(111~114)に含まれる第1及び第2温度センサ(111,112)のうち、該第1温度センサ(111)に一端が接続され、他端が、該他端の温度と前記第2温度センサ(112)が測定する温度とが略等しくなる程、近接して配置された導体パターン(151)が形成されている、
ことを特徴とする温度センサユニット(1001)。 - 前記第2温度センサ(112)と前記導体パターン(151)の他端とは、前記測定面側が熱伝導材(1014)で覆われている、
ことを特徴とする請求項6に記載の温度センサユニット(1001)。 - 被測定対象の体表面に面する測定面側に設けられ、該被測定対象の体表面の温度を測定する複数の温度センサ(111~114)と、
前記複数の温度センサ(111~114)で測定した温度に基づいて、前記被測定対象の体内温度を測定する体内温度測定部(4)と、
を具備し、
前記複数の温度センサ(111~114)に含まれる第1及び第2温度センサ(111,112)のうち、該第1温度センサ(111)の前記測定面側にのみ第1熱抵抗体(121)が設けられ、
前記第1温度センサ(111)と前記第2温度センサ(112)とは、前記第1熱抵抗体(121)の測定面側の温度が、前記第2温度センサ(112)が測定する温度と略等しくなる程、近接して配置されている、
ことを特徴とする体内温度計(100)。 - 前記被測定対象の体内温度が所定の条件を満たしたときに、所定の警告を発する警告部(4)をさらに備える、
ことを特徴とする請求項8に記載の体内温度計(100)。
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US17/428,768 US11573132B2 (en) | 2019-03-14 | 2020-03-09 | Temperature sensor unit and body core thermometer |
JP2020538150A JP6755034B1 (ja) | 2019-03-14 | 2020-03-09 | 温度センサユニット及び体内温度計 |
CN202310143541.9A CN116337278A (zh) | 2019-03-14 | 2020-03-09 | 温度传感器单元及体内温度计 |
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JP7122056B1 (ja) * | 2022-02-22 | 2022-08-19 | Biodata Bank株式会社 | 内部温度測定装置、内部温度測定方法、及びプログラム |
WO2023162054A1 (ja) | 2022-02-22 | 2023-08-31 | Biodata Bank株式会社 | 内部温度測定装置、内部温度測定方法、及びプログラム |
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KR20220070347A (ko) | 2022-05-30 |
AU2020238060B2 (en) | 2022-01-06 |
JPWO2020184511A1 (ja) | 2021-03-18 |
JP6755034B1 (ja) | 2020-09-16 |
US11573132B2 (en) | 2023-02-07 |
CN113286991B (zh) | 2024-05-10 |
CN116337278A (zh) | 2023-06-27 |
KR20210072108A (ko) | 2021-06-16 |
EP3936845A4 (en) | 2022-06-29 |
US20220042856A1 (en) | 2022-02-10 |
AU2020238060A1 (en) | 2021-09-09 |
EP3936845A1 (en) | 2022-01-12 |
CN113286991A (zh) | 2021-08-20 |
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