JP5527162B2 - Thermometer and temperature measurement method - Google Patents

Description

  The present invention relates to a thermometer and a temperature measurement method.

  Conventionally, there are many biological information measuring devices for managing health at home. For example, there is adjustment of salt intake by blood pressure measurement and insulin administration by blood glucose level measurement. In this way, biological information trends are collected by measuring at a fixed time every day. Thus, there is an increasing demand for collecting biological information trends. Therefore, biological information such as health status, basal metabolic status, and mental status can be obtained from body temperature, which is basic vital information. Although it is a measurement means that is familiar everyday due to the simplicity of measurement, it is a measurement method that involves restraint (stationary state) for a while if necessary, and that measurement at the time of activity or constant measurement is a familiar measurement method ( This is rare because there is no product. The present invention relates to an apparatus for improving accuracy of a deep thermometer capable of collecting trends on a daily basis by correcting a heat balance with respect to an object to be measured, a sensor, and the outside of the system.

  For example, when knowing the temperature inside the furnace or inside the piping, without having to worry about deterioration due to corrosion of the thermometer due to internal materials, etc. It is preferable that the internal temperature can be measured indirectly from the exterior.

  In addition, regarding the body temperature of an animal, when it is desired to know the health state, basal metabolic state, and mental state, temperature information on the deep part of the nucleus is required instead of the surface part temperature. Even in that case, there is a desire to accurately know the internal temperature through the surface layer.

  By the way, a device related to a living body is known as a heat flow compensation type thermometer. However, this method has a problem that power consumption is large because a heater is used to keep the temperature-sensitive probe in thermal equilibrium with the core. Furthermore, there is a drawback that the apparatus is large and is not portable. In order to solve these problems, a non-heated deep thermometer has been devised, and a thermometer in which the temperature detector and the thermal resistance value of the skin are unknown and a deep body temperature can be obtained is known (see, for example, Patent Document 1). This is a technology for obtaining the deep temperature by making the heat resistance difference on the opposite side of the measurement site by making the thermal resistance of the heat insulating material on the side to be bonded to the measurement site common, and in this case This technology can measure the deep temperature only with temperature information even if the thermal resistance value of the related material is unknown.

JP 2006-308538 A

  However, in the case of the means of Patent Document 1, since the heat balance occurring between the object to be measured and the outside air or between the sensor and the outside air affects the measurement due to the downsizing of the sensor, the accuracy is obtained. There is a risk of being lost.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

  Application Example 1 A base material in which one surface is arranged at the boundary surface between the first medium and the second medium, a first temperature measurement unit that measures the temperature at the first position of the base material as a first temperature, The second temperature measuring unit that measures the temperature of the second position having a thermal resistance value between the first position as the second temperature, the first temperature measuring unit, and the second temperature measuring unit are arranged. A medium temperature measuring unit that measures the temperature of the first medium or the second medium surrounding the substrate as a medium temperature, the first temperature measuring unit, and the substrate on which the second temperature measuring unit is arranged. An outer body disposed on the first medium or the second medium, an inner medium that fills the inside, in which the base material of the outer body is disposed, the first temperature, the second temperature, and the medium temperature, Calculating the temperature inside the first medium or the second medium as a deep temperature using Thermometer, characterized in that it comprises a and.

  According to this application example, in a thermometer that measures the temperature inside a substance, in order to calculate and correct the heat balance that occurs between the object to be measured and the outside air, or between the temperature measuring unit and the outside air, the deep temperature is Accurate measurement. In particular, the problem of the heat balance is greatly affected by downsizing the thermometer, but it can be corrected by calculation, so that the thermometer can be downsized. Furthermore, by providing the outer body so as to surround the base material, the heat transfer with the outside of the base material is relaxed, and the first temperature and the second temperature can be measured stably.

  Application Example 2 In the thermometer according to the application example described above, the calculation unit calculates a constant relating the first temperature, the second temperature, and the medium temperature, and A thermometer comprising: a deep temperature calculator that calculates the deep temperature based on the constant calculated by a constant calculator.

  According to this application example, the deep temperature can be calculated with high accuracy by using the constant that relates the medium temperature, the first temperature, and the second temperature.

Application Example 3 In the thermometer according to the application example described above, the medium temperature above the (Tout ₁₎ a first temperature (Tb ₁₎ and said second temperature (Tp ₁₎ and said at the medium temperature (Tout ₂₎ From the first temperature (Tb ₃ ) and the second temperature (Tp ₃ ) at the first temperature (Tb ₂ ), the second temperature (Tp ₂ ), and the medium temperature (Tout ₃ ), the medium temperature, A thermometer, wherein a constant relating the first temperature and the second temperature is calculated, and the deep temperature (Tc) is calculated.

  According to this application example, the depth temperature can be accurately measured by obtaining a constant from the medium temperature, the first temperature, and the second temperature that can be measured from the surface.

  Application Example 4 In the thermometer described in the application example, constants (a, c, d) relating the medium temperature, the first temperature, and the second temperature are set.

To calculate the deep temperature (Tc)

A thermometer that is calculated by the following formula.

  According to this application example, by obtaining the constants (a, c, d) from the measurement of the medium temperature, the first temperature, and the second temperature, the deep temperature can be calculated easily and accurately. Furthermore, since the deep temperature is obtained only from the constants (a, c, d), the deep temperature can be calculated without considering the influence of individual differences such as the environment surrounding the thermometer and the thermal resistance value of the measured object.

Application Example 5 In a thermometer according to the application example described above, the medium temperature above the (Tout ₁₎ a first temperature (Tb ₁₎ and said second temperature (Tp ₁₎ and said at the medium temperature (Tout ₂₎ A thermometer, wherein the deep temperature (Tc) is calculated from a first temperature (Tb ₂ ) and the second temperature (Tp ₂ ).

  According to this application example, in order to create a system of two heat flows from two outside air temperatures, the heat balance occurring between the sensor and the measured object and the outside air is canceled in the process of obtaining the deep temperature Tc, and the deep temperature is accurately measured. it can.

  Application Example 6 In the thermometer described in the application example, the deep temperature (Tc) is

A thermometer that is calculated by the following formula.

  According to this application example, the deep temperature can be easily calculated from the measurement of the first temperature and the second temperature. Furthermore, since only two values of the first temperature and the second temperature are necessary for the calculation, it is necessary to consider the effects of individual differences such as the environment surrounding the thermometer and the thermal resistance value of the object to be measured. Temperature can be calculated.

  Application Example 7 In the thermometer according to the application example described above, a heat insulating material having a predetermined thermal resistance value is provided between the measurement position of the first temperature and the measurement position of the second temperature. A thermometer characterized by that.

  According to this application example, in order to increase the thermal resistance between the first temperature measurement position and the second temperature measurement position, a temperature difference between the first temperature and the second temperature can be obtained. Furthermore, since the temperature difference is obtained by the thermal resistance, both measurement positions can be brought close to each other, so that the thermometer can be reduced in size and thickness.

  Application Example 8 In the thermometer according to the application example described above, the temperature of the outer body or the internal medium is measured as the medium temperature.

  According to this application example, the medium temperature measurement position can be easily installed, so that productivity is improved.

  Application Example 9 The thermometer according to the application example, wherein the outer body is a heat conductor.

  According to this application example, heat exchange between the outside and the inside of the outer body is possible, so that a temperature difference between the first temperature and the second temperature can be obtained. Furthermore, since both measurement positions can be brought closer to the direction of heat flow generated between media having different temperatures, the thermometer can be made thinner.

  Application Example 10 In the thermometer according to the application example described above, a display device that has a display unit that displays the deep temperature calculated by the calculation unit, the medium temperature measurement unit, and the first temperature measurement unit. A thermometer main body having the second temperature measuring section, wherein the display device and the thermometer main body are configured separately.

  According to this application example, since the display device and the thermometer main body are configured separately, the weight reduction of the thermometer main body that needs to contact the surface of the measurement target is promoted. Therefore, even if the thermometer body is brought into contact with the surface of the object to be measured for a long time, there is no burden, and continuous temperature monitoring can be performed over a long time.

  Application Example 11 In the thermometer according to the application example described above, the calculation unit is provided in the display device.

  According to this application example, since the deep temperature calculation unit is provided in the display device, the components of the thermometer main body are suppressed to the minimum. Therefore, the weight and size of the thermometer main body are promoted, and the burden is further reduced even when the thermometer main body is brought into contact with the surface of the object to be measured, even for long-time measurement.

  Application Example 12 In the thermometer according to the application example described above, the display device and the thermometer main body each include transmission / reception means capable of transmitting / receiving information to / from each other by wireless communication.

  According to this application example, since the display device and the thermometer main body are each provided with transmission / reception means and are configured to be able to communicate with each other wirelessly, the display device can be installed at a certain distance from the thermometer main body. Become. Since the display device is not wired with the thermometer main body, the thermometer main body can be completely separated from the display device. Therefore, the weight reduction of the thermometer main body is further promoted, and the handleability of the thermometer main body is improved.

  [Application Example 13] A thermometer according to the application example described above, wherein the thermometer is configured to be attached to the boundary surface.

  According to this application example, since the thermometer is configured to be able to be attached to the surface of the measurement target, the operability and portability of the thermometer are improved. For example, when a thermometer is used for an infant or an infant, it is difficult to maintain good contact between the thermometer and the body surface for a certain period of time. Even in such cases, the thermometer can be attached to the body surface, so even if an infant or infant moves, the contact state between the body surface and the thermometer can be maintained well, so accurate temperature can be measured. It becomes.

  Application Example 14 A temperature measurement method for measuring the internal temperature of the first medium or the second medium as a deep temperature, wherein a surface is arranged at the boundary surface between the first medium and the second medium. Measuring the temperature of the first position of the material as the first temperature, measuring the temperature of the second position having a thermal resistance value with the first position as the second temperature, and the first medium surrounding the substrate or The depth temperature is calculated based on the temperature measurement step of measuring the temperature of the second medium as the medium temperature, and the first temperature, the second temperature, and the medium temperature measured in the temperature measurement step. A temperature measurement method comprising: an arithmetic step for performing the operation.

  According to this application example, in the constant calculation step, the constant is calculated based on the measurement value obtained in the temperature measurement step. In the deep temperature calculation step, the deep temperature of the measurement target is calculated based on the constant obtained in the constant calculation step.

  In order to calculate and correct the heat balance occurring between the object to be measured or the thermometer and the outside air, the temperature measurement method for accurately measuring the depth temperature is provided.

  [Application Example 15] In the temperature measurement method according to the application example, the calculation step includes a constant calculation step for calculating a constant relating the first temperature, the second temperature, and the medium temperature; And a depth temperature calculation step of calculating the depth temperature based on the constant calculated in the constant calculation step.

  According to this application example, in the depth temperature calculation step, the depth temperature of the measurement target is calculated based on the constant obtained in the constant calculation step, and thus the depth temperature can be easily and accurately measured.

Application Example 16 In the temperature measuring method according to the application example, in the medium temperature above the (Tout ₁₎ a first temperature (Tb ₁₎ and said second temperature (Tp ₁₎ and said medium temperature (Tout ₂₎ From the first temperature (Tb ₃ ) and the second temperature (Tp ₃ ) at the first temperature (Tb ₂ ), the second temperature (Tp ₂ ), and the medium temperature (Tout ₃ ), the constant calculating step is

The constants (a, c, d) are calculated by the following formula, and the deep temperature calculation step includes:

The temperature measurement method is characterized in that the deep temperature Tc is calculated from the following formula.

  According to this application example, by calculating the constants (a, c, d) in the constant calculation step, the deep temperature can be calculated using only these constants in the deep calculation step.

  Provided is a temperature measurement method capable of calculating the deep temperature without considering the influence of individual differences such as the environment surrounding the thermometer and the thermal resistance value of the measured object.

Application Example 17] In the temperature measuring method according to the application example, in the medium temperature above the (Tout ₁₎ a first temperature (Tb ₁₎ and said second temperature (Tp ₁₎ and said medium temperature (Tout ₂₎ From the first temperature (Tb ₂ ) and the second temperature (Tp ₂ ), the deep temperature calculation step includes:

The temperature measurement method is characterized in that the deep temperature Tc is calculated from the following formula.

  According to this application example, the deep temperature can be easily and accurately calculated using the measurement value obtained in the temperature measurement process in the deep calculation process.

  Provided is a temperature measurement method capable of calculating a deep temperature without taking into consideration the influence of the environment surrounding the thermometer and the individual difference between the medium 1 and the medium 2 corresponding to the measured object.

  [Application Example 18] In the temperature measurement method according to the application example described above, the temperature of the outer body disposed on the first medium or the second medium surrounding the base material, or the base material of the outer body is disposed. A temperature measuring method, wherein the temperature of an internal medium that fills the inside is measured as the medium temperature.

  According to this application example, since the medium temperature can be measured stably, a temperature measurement method that can calculate the deep body temperature without being affected by disturbance is provided.

The block block diagram which shows the electronic thermometer which concerns on 1st embodiment. The enlarged view which shows the state with which the thermometer main body which concerns on 1st embodiment was mounted | worn with the human body. The figure which shows the state with which the thermometer main body and display apparatus which concern on 1st embodiment were mounted | worn. The figure which shows the thermometer main body which concerns on 1st embodiment. The graph and figure which show the thermometer main body which concerns on 1st embodiment, and the temperature transition of each sensor. The flowchart which shows operation | movement of the electronic thermometer which concerns on 1st and 2nd embodiment. The figure which showed the thermometer main body which concerns on the modification 1 and the modification 2. FIG. The figure which showed the thermometer main body which concerns on Example 1 and Example 2. FIG. The figure which showed the result of the deep part temperature calculation which concerns on Example 1 and Example 2. FIG.

  (First embodiment)

  Hereinafter, an electronic thermometer as a thermometer according to the present embodiment and a measurement method thereof will be described with reference to the drawings.

  FIG. 1A is a block diagram showing an electronic thermometer according to this embodiment. The electronic thermometer 2 includes a thermometer body 10 that is in contact with a body surface 4A of a subject 4 (see FIG. 3) that is an object to be measured, and a display device 12 that is provided separately from the thermometer body 10.

  FIG. 2 is an enlarged view showing a state in which the thermometer main body 10 according to the present embodiment is mounted on the subject 4, and FIG. 3 is a state in which the thermometer main body 10 and the display device 12 according to the present embodiment are mounted. FIG.

  First, as shown in FIG. 2, the thermometer main body 10 includes a temperature measurement unit 14 (see FIG. 3). The temperature measurement unit 14 includes a heat insulating part 18 having a contact surface 18A that contacts the body surface 4A of the subject 4, an outer part 16A provided between the heat insulating part 18 and the outside air part 16, and the outer part. And internal / external air 16B separated from the external air by the portion 16A.

  The temperature measurement unit 14 includes a first temperature sensor (first temperature measurement unit) 20 and a second temperature sensor (second temperature measurement unit) 22 as measurement units for measuring the temperature inside the heat insulation unit 18 or the temperature of the outer periphery. It has.

  In addition, the temperature measurement unit 14 includes an outside air temperature sensor (medium temperature measurement unit) 24 as a temperature measurement unit in the outer part 16 </ b> A or the internal outside air 16 </ b> B between the heat insulating part 18 and the outside air part 16.

  The thermometer main body 10 including the temperature measuring unit 14 has a contact surface 18A that can be affixed to the subject 4 with an adhesive or the like, and can adhere to the body surface 4A with a good contact force with the adhesive or the like. It is configured.

  Here, it is desirable that the attachment position of the thermometer main body 10 is set at a site such as the forehead, the back of the head, the chest, and the back where the body surface temperature can be measured relatively stably. Moreover, even if clothes are worn on the thermometer main body 10, the thermometer main body 10 may be in contact with bedding or the like.

  As the first temperature sensor 20, the second temperature sensor 22, and the outside air temperature sensor 24, a device that converts a temperature value into a resistance value, a device that converts a temperature value into a voltage value, or the like can be adopted. For converting the temperature value into the resistance value, a chip thermistor, a flexible substrate on which a thermistor pattern is printed, a platinum resistance thermometer, or the like can be employed. In addition, a thermocouple element, a PN junction element, a diode, or the like can be adopted as a device that converts a temperature value into a voltage value.

  In addition to the first temperature sensor 20, the second temperature sensor 22, and the outside air temperature sensor 24, the temperature measurement unit 14 includes an A / D conversion unit 26 as shown in FIG.

  The A / D conversion unit 26 converts analog signals of resistance values and voltage values converted by the first temperature sensor 20, the second temperature sensor 22, and the outside air temperature sensor 24 into digital signals, and a transmission / reception unit (transmission / reception unit). To 28.

  The transmission / reception unit 28 includes an antenna coil 30 and transmits a signal of a temperature value (resistance value or voltage value) converted into a digital signal by the A / D conversion unit 26 to the display device 12 side.

  The display device 12 is obtained from the display unit 32 that displays the measurement result of the body temperature, the operation unit 34 that operates the display device 12 from the outside, the calculation unit 36 that controls the operation of the display device 12, the calculation unit 36, and the like. And a storage unit 38 for storing the received information.

  The display unit 32 displays temperature information and an operation screen on a liquid crystal screen or the like, and can display, for example, a measured body surface temperature or a deep body temperature as a calculated deep temperature. In this embodiment, the display part 32 is provided in the part corresponded to the dial etc. of a wristwatch as an example, and the display part 32 can be visually recognized in the state where the operator 6 put the display apparatus 12 on the arm.

  The operation unit 34 is configured to be able to input information to the display device 12 from the outside by using buttons, levers, keys, or the like. For example, the operation unit 34 selects a menu according to a screen displayed on the display unit 32, or other measurement subject ( In this embodiment, it is configured to enable input of information such as the name, age, and date of measurement of body temperature of the infant.

  The calculation unit 36 calculates a constant using the first temperature Tb from the first temperature sensor 20, the second temperature Tp from the second temperature sensor 22, and the outside air temperature Tout from the outside air temperature sensor 24. The calculation unit 40 includes a deep body temperature calculation unit 42 that calculates the deep body temperature Tc of the subject 4 based on the constant a, the constant c, and the constant d calculated by the constant calculation unit 40.

  The constant calculation unit 40 calculates a constant a, a constant c, and a constant d that linearly relate the first temperature sensor 20, the second temperature sensor 22, and the outside air temperature sensor 24 from the subject 4.

  The deep body temperature calculation unit 42 calculates the deep body temperature Tc of the subject 4 using the constant a, the constant c, and the constant d calculated by the constant calculation unit 40.

  The display device 12 may include an I / F such as a wireless (not shown), a logging system, and a USB as an output unit of each data.

  FIG. 4A is a diagram showing the structure of the thermometer main body 10 disclosed in Japanese Patent Laid-Open No. 2006-308538, which is a prior art of the present embodiment. The first body surface temperature T1 from the first body surface temperature sensor 50A, the first intermediate temperature T2 from the first intermediate temperature sensor 52A, or the second body surface temperature T3 from the second body surface temperature sensor 50B. Based on the second intermediate temperature T4 from the second intermediate temperature sensor 52B, the relational expression of Expression (1) is obtained in order to obtain the deep body temperature.

  Further, as shown in FIG. 4B, the first heat radiation control unit 54A of the temperature measurement unit 14A and the second heat radiation control unit 54B of the temperature measurement unit 14B are made of different materials, and thereby the first heat radiation control unit 54B. The thermal resistance value of the control unit 54A and the thermal resistance value of the second heat radiation control unit 54B are set to different values. 54A of 1st thermal radiation control parts and 54B of 2nd thermal radiation control parts are provided in the part which touches external air so that temperature distribution of 56 A of 1st systems and the 2nd system 56B may differ.

  FIG. 5 is a graph and a diagram showing a temperature transition of the thermometer main body 10 and each sensor according to the present embodiment. FIG. 5A is a diagram in the case where the environmental temperature where the thermometer main body 10 and the subject 4 are placed is in a constant state, and the temperature of the outside air temperature sensor shows a constant value. FIG. 5B is a diagram in the case where the environmental temperature where the thermometer main body 10 and the subject 4 are placed changes and the temperature of the outside temperature sensor changes. The deep body temperature Tc does not depend on the thermal resistance between the temperature detection unit and the skin, as shown in Equation (1).

  As shown in FIG. 5A, when the second temperature Tp, which is the temperature of the second temperature measurement unit 22, is actively changed, the first temperature Tb, which is the temperature of the first temperature measurement unit 20, is linear. To change. The change amount a and the offset value b depend on the thermal resistance value and the heat balance existing between the first temperature measurement unit 20 and the second temperature measurement unit 22. The relational expression (2) is established between the first temperature Tb and the second temperature Tp using the constant a and the constant b, respectively.

  If the second temperatures Tp at any two points are TpA and TpB, and the first temperatures Tb at that time are TbA and TbB, respectively, T1, T2, T3, and T4 in Equation (1) are constants a and b. Based on this, the relational expression of Expression (3) is established for each.

  The expression (1) is established only in a state where there is no heat balance occurring between the sensor and another heat conductor such as air as a constraint condition. In particular, as the size and thickness are reduced, the problem of error due to this heat balance tends to become apparent. Therefore, when the difference of the heat balance is ΔTc and the difference term of the heat balance is considered in the expression (1), the relational expression of the expression (4) is obtained.

  Therefore, based on the equation (3), the deep body temperature considering the error due to the heat balance has the relationship of the equation (5).

  As shown in FIG. 5B, when the temperature of the outside temperature sensor indicates the values of Tout1, Tout2, and Tout3, the first temperature Tb is Tb1, Tb2, and Tb3, respectively, and the second temperature Tp is respectively It is a figure in case it becomes Tp1, Tp2, Tp3.

  In this case, since the first temperature Tb shows a linear relationship not only with the second temperature Tp but also with the outside air temperature Tout, Expression (6) is obtained.

  Therefore, since the constant b is linear with the outside air temperature Tout, the equation (7) is obtained.

  Based on Expression (7), Expression (8) representing the deep body temperature is obtained.

  Here, since the heat transfer occurs due to the temperature difference, the difference ΔTc in the heat balance does not occur when the values of the outside air temperature Tout and the deep body temperature Tc are equal, and therefore ΔTc = 0. Therefore, when there is no influence of the heat balance, Equation (9) is obtained for the deep body temperature.

  In order to obtain the deep body temperature, a constant a, a constant c, and a constant d are calculated. Since the first temperature Tb, the second temperature Tp, and the outside air temperature Tout can be actually measured for the expression (6), the expression (11) is obtained based on the expression (10) for the three constants.

  Therefore, the constant calculation unit 40 stores the equation (11) as an equation for calculating the constant a, the constant c, and the constant d.

  Equation (9) is stored in the deep body temperature calculation unit 42 as a calculation expression for the deep body temperature Tc.

  The storage unit 38 stores the first temperature Tb, the second temperature Td, and the outside air temperature Tout transmitted from the thermometer body 10. The constant a, constant c, and constant d calculated by the constant calculation unit 40 are also stored. Further, the deep body temperature Tc of the subject 4 calculated by the deep body temperature calculation unit 42 is also stored.

  Here, the storage unit 38 is configured to be able to store temperature information regarding a plurality of subjects 4, and the deep body temperature Tc and the like are stored for each subject 4. Moreover, the memory | storage part 38 can memorize | store the constant a calculated when calculating deep body temperature Tc, the constant c, and the constant d. In addition to the temperature information described above, the storage unit 38 may store measurement information such as the name, age, and measurement date and time of the person to be measured (subject 4, infant). In this case, the measurement information may be input from the operation unit 34.

  Such an electronic thermometer 2 operates as follows.

   FIG. 6A is a flowchart showing the operation of the electronic thermometer 2 according to the present embodiment.

  First, the thermometer body 10 is attached to the subject 4 (in this embodiment, the chest of the infant), and the operator 6 of the electronic thermometer 2 holding the infant wears the display device 12 on his arm. When the switch of the display device 12 is turned on when the operator 6 operates the operation unit 34 of the display device 12, the transmission / reception unit 28 transmits radio waves to the thermometer body 10 (temperature measurement unit 14) via the antenna coil 30. To do. The thermometer body 10 is charged by generating an electromotive force in the antenna coil 30 by electromagnetic induction by the radio waves.

  Next, the thermometer main body 10 is activated by the electromotive force, and the first temperature sensor 20, the second temperature sensor 22, and the outside air temperature sensor 24 are activated.

  Next, when each of these sensors 20, 22, 24 is activated, the thermometer main body 10 transmits a standby signal from the transmission / reception unit 28 to the display device 12.

  Next, when receiving the standby signal, the calculation unit 36 of the display device 12 transmits a temperature measurement start signal from the transmission / reception unit 28 via the antenna coil 30.

  Next, the thermometer main body 10 receives this temperature measurement start signal, drives the first temperature sensor 20, the second temperature sensor 22, and the outside air temperature sensor 24, and includes the outer peripheral portion of the heat insulating material 18. The internal temperature including the first temperature Tb (Tb1, Tb2, Tb3), the second temperature Tp (Tp1, Tp2, Tp3) and the outer peripheral portion of the outer portion 16A, which are the temperatures of any two internal points, The outside air temperature Tout (Tout1, Tout2, Tout3), which is the temperature of the internal outside air 16B between the heat insulating material 18 and the outer portion 16A, is measured (step S10, temperature measuring step). The temperature information of the first temperature Tb, the second temperature Tp, and the outside air temperature Tout is converted from an analog signal to a digital signal by the A / D conversion unit 26 and transmitted to the display device 12 by the transmission / reception unit 28. The The first temperature Tb and the second temperature Tp are preferably measured after a predetermined time has elapsed so that the heat transfer from the deep part of the subject 4 to the body surface 4A is in a steady state (equilibrium state).

  In this way, by measuring the first temperature Tb, the second temperature Tp, and the outside air temperature Tout every predetermined time, (Tb1, Tp1, Tout1) that is a combination of three patterns, (Tb2, Tp2, Tout2) and (Tb3, Tp3, Tout3) are measured and stored in the storage unit 38.

  Next, in the constant calculation unit 40 of the calculation unit 36, the first temperature Tb (Tb1, Tb2, Tb3) called from the storage unit 38, the second temperature Tp (Tp1, Tp2, Tp3), the outer portion 16A or the heat insulation. By substituting the outside air temperature Tout (Tout1, Tout2, Tout3), which is the temperature of the internal outside air 16B between the part 18 and the outer part 16A, into the equation (11), a constant a, a constant c, and a constant d Are calculated (step S20, constant calculation step).

  Next, the deep body temperature calculation unit 42 of the calculation unit 36 calculates the deep body temperature Tc by substituting the constant a, the constant c, and the constant d calculated in Step S20 into the equation (9) (Step S20). S30, deep body temperature calculation step).

  Next, the calculation unit 36 stores the deep body temperature Tc in the storage unit 38 and displays the deep body temperature Tc on the display unit 32. The operator 6 can check the deep body temperature Tc on the display unit 32 of the wristwatch type display device 12 while holding the infant.

  Thereafter, the calculation unit 36 counts the elapsed time from the measurement of the first temperature Tb with a built-in timer, and monitors whether or not a predetermined time has elapsed. When the elapsed time is equal to or longer than the predetermined time, the processing unit 36 returns to step S10, and transmits a measurement start signal to the thermometer main body 10, and again measures the first temperature Tb, the second temperature Tp, and the outside air temperature Tout.

  In this way, Tc is measured every predetermined time and stored in the storage unit 38.

  (Second embodiment)

  Hereinafter, an electronic thermometer as a thermometer according to the present embodiment and a measurement method thereof will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected about the element similar to said 1st embodiment, and the description is abbreviate | omitted suitably.

  In the prior art of FIG. 4, as shown in FIG. 4A, two different heat flow systems are placed under the same outside air temperature as the first system 56A and the second system 56B.

  In the present embodiment, two different heat flow systems are created in two cases where the outside air temperatures are different. The system of two different outside air temperatures Tout1 and Tout2 can cancel the heat balance term ΔTc that causes an error in the deep body temperature Tc.

  Therefore, as shown in FIG. 5B, when the temperature of the outside air temperature sensor indicates the values of Tout1 and Tout2, the first temperature Tb becomes Tb1 and Tb2, respectively, and the second temperature Tp becomes Tp1 and Tp2, respectively. In this case, the deep body temperature is calculated based on the relationship of the expression (1).

  For the two points Tb and Tp arbitrarily arranged inside including the outer periphery of the heat insulating portion 18, assuming that the first temperature Tb is Tb1 and Tb2, and the second temperature Tp at that time is Tp1 and Tp2, respectively, T1, T2, T3, and T4 are T1 = Tb1, T2 = Tp1, T3 = Tb2, and T4 = Tp2, and Expression (12) is obtained.

Such an electronic thermometer 2 operates as follows.
FIG. 6B is a flowchart showing the operation of the electronic thermometer 2 according to the present embodiment.

  The thermometer main body 10 receives the temperature measurement start signal, drives the first temperature sensor 20, the second temperature sensor 22, and the outside air temperature sensor 24, and includes an arbitrary internal part including the outer peripheral part of the heat insulating part 18. The first temperature Tb (Tb1, Tb2), which is the temperature of two points, the second temperature Tp (Tp1, Tp2), and the outside temperature Tout (Tout1, Tout2) which is the internal temperature including the outer peripheral part of the outer portion 16A Is measured (step S40, temperature measurement step). The temperature information of the first temperature Tb, the second temperature Tp, and the outside air temperature Tout is converted from an analog signal to a digital signal by the A / D conversion unit 26 and transmitted to the display device 12 by the transmission / reception unit 28. The The first temperature Tb and the second temperature Tp are preferably measured after a predetermined time has elapsed so that the heat transfer from the deep part of the subject 4 to the body surface 4A is in a steady state (equilibrium state).

  Next, in the deep body temperature calculation part 42 of the calculation part 36, the first temperature Tb (Tb1, Tb2) called from the storage part 38, the second temperature Tp (Tp1, Tp2), the outer part 16A or the heat insulating part 18 The deep body temperature Tc is calculated by substituting the outside air temperature Tout (Tout1, Tout2), which is the temperature of the internal outside air 16B between the outer part 16A and the equation (12) (step S50, deep body temperature calculation step). .

  Thereafter, the calculation unit 36 counts the elapsed time from the measurement of the first temperature Tb with a built-in timer, and monitors whether or not a predetermined time has elapsed. When the elapsed time is equal to or longer than the predetermined time, the processing unit 36 returns to step S10, and transmits a measurement start signal to the thermometer main body 10, and again measures the first temperature Tb, the second temperature Tp, and the outside air temperature Tout.

  Thus, (Tb1, Tp1, Tout1) and (Tb2, Tp2, Tout2) are measured by measuring the first temperature Tb, the second temperature Tp, and the outside air temperature Tout every predetermined time. Then, the deep body temperature Tc is calculated and stored in the storage unit 38.

(Modification 1)
Next, the outside air temperature sensor 24 will be described with respect to the temperature measurement unit 14 according to this modification. In addition, the same code | symbol is attached | subjected about the element same as the said embodiment, and the description is abbreviate | omitted suitably.

  FIG. 7A is a view showing a thermometer body according to this modification. As shown in FIG. 7A, the temperature of the internal outside air 16B is measured as Tout by disposing the outside air temperature sensor 24 between the outer portion 16A and the heat insulating portion 18.

(Modification 2)
Next, the outside air temperature sensor 24 will be described with respect to the temperature measurement unit 14 according to this modification. In addition, the same code | symbol is attached | subjected about the element same as the said embodiment, and the description is abbreviate | omitted suitably.

  FIG. 7B is a view showing a thermometer main body according to this modification. As shown in FIG. 7B, the outside air temperature sensor 24 is installed between the heat insulating portion 18 and the inside outside air 16B, and the wall surface temperature of the outer portion 16A is measured as Tout by a non-contact measuring device such as an infrared sensor.

Example 1
Next, the deep body temperature calculation according to the present embodiment will be described using one embodiment. In addition, the same code | symbol is attached | subjected about the element same as the said embodiment, and the description is abbreviate | omitted suitably.

  FIG. 8A is a diagram showing the prior art of Patent Document 1 which is a conventional example, and FIG. 8B is a diagram showing a thermometer body according to the present example. FIGS. 9A to 9C are diagrams illustrating the results of the deep body temperature calculation according to the present example.

  In the conventional example, as shown in FIG. 9A, when the heat source temperature was measured at 37 ° C., the deep body temperature Tc = 30.941889 ° C. and the difference from the actual measurement was −6.0518 ° C.

  Next, in this embodiment, as shown in FIG. 9B, Tout = 23 ° C., Tout = 30 ° C., Tout = 35 ° C. at the measurement positions TA, TB, TC, TD, TE, TF of the heat insulating portion 18. In the case of, each temperature measurement was obtained.

  Next, the first temperature Tb and the second temperature Tp were measured at two arbitrary temperature measurement positions of the heat insulating portion 18. As shown in FIG. 9C, the first temperature measurement position 20 was set as the measurement position TC, and the second temperature measurement position 22 was set as the measurement position TF. When the heat source temperature is measured at 37 ° C., the constant a = −0.5, the constant c = 1.00035, the constant d = 18.48705, the deep body temperature Tc = 37 ° C., and the difference from the actual measurement is 0 ° C. there were. If this calculation method is used, the deep body temperature can be calculated with high accuracy.

(Example 2)
Next, deep body temperature calculation according to the present embodiment will be described using another embodiment. In addition, the same code | symbol is attached | subjected about the element same as the said embodiment, and the description is abbreviate | omitted suitably. Further, the conventional example, the thermometer body, the temperature measurement value at each temperature measurement position, the first temperature measurement position 20, and the second temperature measurement position 22 are the same as those in the first embodiment.

  FIG. 8B is a view showing a thermometer main body according to the present embodiment. FIG. 9D is a diagram showing a result of the deep body temperature calculation according to the present example. When the outside temperature Tout = 23 ° C., the first temperature Tb is Tb1, the second temperature Tp is Tp1, the outside temperature Tout = 30 ° C., the first temperature Tb is Tb2, and the second temperature Tp is Tp2. The difference between the deep body temperature Tc = 37 ° C. and the actual measurement was 0 ° C. If this calculation method is used, the deep body temperature can be calculated with high accuracy.

  According to the present embodiment, in the thermometer that measures the internal temperature through the substance, the depth temperature can be accurately measured by calculating and correcting the mounting position deviation of the sensor.

  In addition, although the said embodiment has narrowed down the technical field as an apparatus which measures a living body, especially an electronic thermometer, it can detect the temperature inside through a substance which is not restricted to a living body. It can be applied to the measurement of the internal temperature of piping and the internal temperature of the engine room.

  DESCRIPTION OF SYMBOLS 2 ... Electronic thermometer 4 ... Subject (object to be measured) 4A ... Body surface 6 ... Operator 10 ... Thermometer main body 12 ... Display device 14 ... Temperature measuring part 16 ... Outside air part 16A ... Outer part 16B ... Inside outside air 18 ... Heat insulation part 18A ... contact surface 20 ... first temperature sensor (first temperature measuring unit) 22 ... second temperature sensor (second temperature measuring unit) 24 ... outside air temperature sensor (outside air temperature measuring unit) 24A ... outside air temperature measuring position 26 ... A / D converter 28 ... transmission / reception unit 30 ... antenna coil 32 ... display unit 34 ... operation unit 36 ... calculation unit 38 ... storage unit 40 ... constant calculation unit 42 ... deep body temperature calculation unit (deep temperature calculation unit) 50A ... first body Surface temperature sensor (first body surface temperature measurement unit) 50B ... Second body surface temperature sensor (second surface temperature measurement unit) 52A ... First intermediate temperature sensor (first intermediate temperature measurement unit) 2B ... second intermediate temperature sensor (second intermediate temperature measuring portion) 54A ... first heat dissipation control part 54B ... second heat dissipation control part 56A ... first line 56B ... second system.

Claims (18)

A substrate;
A first temperature measuring unit that measures the temperature at the first position of the substrate as a first temperature;
A second temperature measurement unit that measures a temperature at a second position different from the first position of the base material as a second temperature;
A medium temperature measuring unit for measuring the temperature of the medium in the outer shell surrounding the substrate as the medium temperature;
A calculation unit that calculates the deep temperature of the subject using the first temperature, the second temperature, and the medium temperature;
Thermometer characterized by including. The thermometer according to claim 1,
The computing unit is
A constant calculating unit that calculates a constant relating the first temperature, the second temperature, and the medium temperature;
Based on the constant calculated by the constant calculator, a deep temperature calculator that calculates the deep temperature;
Thermometer characterized by including. The thermometer according to claim 1 or 2 ,
The medium temperature first medium temperature the first temperature during the (Tout ₁₎ (Tb ₁₎ and said second temperature (Tp _1), and the medium temperature is a second medium temperature (Tout ₂₎ It said first temperature (Tb ₂₎ and said second temperature in (Tp _2), and the medium temperature is the first temperature in the third medium temperature (Tout ₃₎ (Tb ₃₎ and the second A thermometer characterized in that a constant relating the medium temperature, the first temperature, and the second temperature is calculated from a temperature (Tp ₃ ), and the deep temperature (Tc) is calculated. The thermometer according to claim 1 or 2,
Constants (a, c, d) relating the medium temperature, the first temperature, and the second temperature.

Calculated by the formula
The deep temperature (Tc)

A thermometer that is calculated by the following formula. The thermometer according to claim 1,
Said first of said at medium temperature (Tout ₁₎ a first temperature (Tb ₁₎ and said second temperature (Tp _1), and said second medium temperature the in (Tout ₂₎ a first temperature (Tb ₂₎ And the second temperature (Tp ₂ ), the deep temperature (Tc) is calculated. The thermometer according to claim 1 or 5,
The deep temperature (Tc)

A thermometer that is calculated by the following formula. In the thermometer as described in any one of Claims 1-6,
Wherein between the first temperature measurement position of the measurement position of the second temperature, thermometer, wherein a heat insulating material having a predetermined heat resistance is provided. In the thermometer as described in any one of Claims 1-7,
A thermometer for measuring the temperature of the outer body as the medium temperature. In the thermometer as described in any one of Claims 1-8,
The thermometer, wherein the outer body is a heat conductor. In the thermometer as described in any one of Claims 1-9,
A display device having a display unit for displaying the deep temperature calculated by the calculation unit;
A thermometer body having the medium temperature measuring unit, the first temperature measuring unit, and the second temperature measuring unit;
Including
The display device and the thermometer main body are configured as separate bodies. The thermometer according to claim 10,
The said calculating part is provided in the said display apparatus, The thermometer characterized by the above-mentioned. The thermometer according to claim 10 or 11,
The display device and the thermometer main body each include transmission / reception means capable of transmitting / receiving information to / from each other by wireless communication. In the thermometer according to any one of claims 1 to 12,
A thermometer configured to be capable of being attached to the boundary surface. Measuring the temperature at the first position of the substrate as the first temperature ;
Measuring a temperature at a second position different from the first position of the substrate as a second temperature ;
A temperature measuring step of measuring the temperature of the medium in the outer shell surrounding the substrate as the medium temperature;
A calculation step of calculating a deep temperature of the subject based on the first temperature, the second temperature, and the medium temperature;
A temperature measurement method comprising: The temperature measurement method according to claim 14, wherein
The calculation step includes
A constant calculating step for calculating a constant relating the first temperature, the second temperature, and the medium temperature;
A deep temperature calculation step of calculating the deep temperature based on the constant calculated in the constant calculation step;
A temperature measurement method comprising: The temperature measurement method according to claim 14 or 15,
The constant calculating step, the medium temperature is first medium temperature the first temperature during the (Tout ₁₎ (Tb ₁₎ and said second temperature (Tp _1), and the medium temperature is a second medium temperature said first temperature (Tb ₂₎ and the second temperature during _{(Tout 2) (Tp 2)} , and said first temperature during the medium temperature is a third medium temperature (Tout ₃₎ (Tb ₃₎ and the second temperature (Tp _3),

The constant (a, c, d) is calculated by the formula of
The deep temperature calculation step is

The temperature measurement method is characterized in that the deep temperature Tc is calculated from the following formula. The temperature measurement method according to claim 16, wherein
The deep temperature calculation step, the first medium temperature the in (Tout ₁₎ a first temperature (Tb ₁₎ and said second temperature (Tp _1), and the in the second medium temperature (Tout ₂₎ From the first temperature (Tb ₂ ) and the second temperature (Tp ₂ ) ,

The temperature measurement method is characterized in that the deep temperature Tc is calculated from the following formula. In the temperature measuring method according to any one of claims 14 to 17,
A temperature measurement method comprising measuring the temperature of the outer body as the medium temperature.