WO2022013912A1 - Temperature measurement device, method, and program - Google Patents
Temperature measurement device, method, and program Download PDFInfo
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- WO2022013912A1 WO2022013912A1 PCT/JP2020/027225 JP2020027225W WO2022013912A1 WO 2022013912 A1 WO2022013912 A1 WO 2022013912A1 JP 2020027225 W JP2020027225 W JP 2020027225W WO 2022013912 A1 WO2022013912 A1 WO 2022013912A1
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- 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
Abstract
This temperature measurement method involves measuring the temperature inside a living body on the basis of a temperature detected by a sensor (31), wherein a determination is made, on the basis of a time differential of external temperatures, as to whether an estimated temperature calculation formula for the temperature inside the living body is to be a first formula based on a thermal flux calculated according to the difference between the temperature of one location in the sensor (31) that is near the living body and the temperature of another location, or a second formula for correcting the estimated temperature yielded by the first formula, to calculate the estimated temperature. As a result, this temperature measurement method makes it possible to accurately measure the temperature inside a living body in a non-invasive manner.
Description
本発明は、生体内部の温度を非侵襲に精度良く測定する温度測定装置、方法およびプログラムに関する。
The present invention relates to a temperature measuring device, method and program for non-invasively and accurately measuring the temperature inside a living body.
従来、生体の内部（深部を含む）体温を非侵襲に測定する技術が知られている。例えば、特許文献１（特開２０２０－００３２９１号公報）は、生体と、複数の温度計素子からなる熱流束センサを備える温度測定センサ（以下、「センサ」という。）と、外気とにおける疑似的な一次元モデルを仮定して、生体の深部体温を推定する技術を開示している。
Conventionally, a technique for non-invasively measuring the body temperature inside a living body (including the deep part) is known. For example, Patent Document 1 (Japanese Unexamined Patent Publication No. 2020-003291) describes a living body, a temperature measuring sensor including a heat flux sensor including a plurality of thermometer elements (hereinafter referred to as “sensor”), and a pseudo-outside air. It discloses a technique for estimating the core body temperature of a living body by assuming a one-dimensional model.
図７に、生体７１内部の温度測定における疑似的な一次元モデルの模式図を示す。被測定物（生体）７１の内部の温度Ｔｃｏｒｅは、被測定物（生体）７１の表面に熱抵抗Ｒｓを有する物体（センサ）を置いたとき、センサ７２における表面（その物体と接する面）近傍の温度Ｔｓｋｉｎ、センサ７２における裏面（外気と接する側の面）近傍の温度Ｔｔから以下の式を用いて推定できる。
FIG. 7 shows a schematic diagram of a pseudo one-dimensional model in the temperature measurement inside the living body 71. The temperature Tcore inside the object to be measured (living body) 71 is near the surface (the surface in contact with the object) of the sensor 72 when an object (sensor) having thermal resistance Rs is placed on the surface of the object to be measured (living body) 71. It can be estimated from the temperature Tskin of the above and the temperature Tt near the back surface (the surface on the side in contact with the outside air) of the sensor 72 using the following equation.
Ｔｃｏｒｅ ＝ Ｔｓｋｉｎ ＋ Ｒｂｏｄｙ × Ｈｓｋｉｎ
Tcore = Tskin + Rbody x Hskin
ここで、Ｈｓｋｉｎは熱流束であり、Ｈｓｋｉｎ＝（Ｔｓｋｉｎ－Ｔｔ）／Ｒｓで表される。また、Ｒｂｏｄｙは生体の熱抵抗、Ｒｓはセンサの熱抵抗である。
Here, Hskin is a heat flux and is represented by Hskin = (Tskin-Tt) / Rs. Further, Rbody is the thermal resistance of the living body, and Rs is the thermal resistance of the sensor.
しかしながら、この推定方法では、外気への熱の輸送形態を一定と仮定するため、扇風機などで風を当てる場合や、被測定物がランニングなどにより動く場合には推定温度に誤差が生じる。
However, in this estimation method, since the mode of heat transport to the outside air is assumed to be constant, an error occurs in the estimated temperature when the object is blown by a fan or when the object to be measured moves due to running or the like.
図８に、扇風機で風を当てた時の真の内部温度８１と推定温度８２との比較を示す。この真の内部温度８１と推定温度８２の差（誤差）は、風がある閾値を超えて当てられると、熱の輸送形態が熱伝導から対流熱伝達に変化し、熱が外に伝わる量が大きく変化することに起因する。
FIG. 8 shows a comparison between the true internal temperature 81 and the estimated temperature 82 when the wind is blown by a fan. The difference (error) between the true internal temperature 81 and the estimated temperature 82 is that when the wind exceeds a certain threshold, the heat transport mode changes from heat conduction to convection heat transfer, and the amount of heat transferred to the outside is Due to major changes.
また、対流が生じることにより熱流束Ｈｓｋｉｎはセンサの外部へも流れるため、対流時のＲｂｏｄｙが変化し、誤差が生じる。
In addition, since the heat flux Hskin also flows to the outside of the sensor due to the occurrence of convection, the Rbody at the time of convection changes, and an error occurs.
このように、生体内部の温度の測定において、推定温度に誤差が生じることが問題となっている。また、推定温度の誤差において、誤差が長い時間継続すること、誤差の原因となる熱の対流時に生体の熱抵抗Ｒｂｏｄｙが変化することが問題となる。
As described above, there is a problem that an error occurs in the estimated temperature in the measurement of the temperature inside the living body. Further, in the error of the estimated temperature, there are problems that the error continues for a long time and that the thermal resistance Rbody of the living body changes at the time of convection of heat which causes the error.
上述したような課題を解決するために、本発明に係る温度測定方法は、生体の内部の温度を、センサにより検出された温度を基に測定する温度測定方法であって、外部温度の時間微分に基づいて、前記生体の内部の温度の推定温度の算出式を、前記センサにおける前記生体近傍の一の箇所の温度と他の箇所の温度との差分より算出される熱流束に基づく第１の式と、前記第１の式による推定温度を補正する第２の式とのいずれかに決定して、前記推定温度を算出することを特徴とする。
In order to solve the above-mentioned problems, the temperature measuring method according to the present invention is a temperature measuring method for measuring the temperature inside a living body based on the temperature detected by a sensor, and is a time differentiation of an external temperature. Based on the above, the formula for calculating the estimated temperature of the temperature inside the living body is the first based on the heat flux calculated from the difference between the temperature of one place near the living body and the temperature of the other place in the sensor. It is characterized in that the estimated temperature is calculated by determining either the equation or the second equation for correcting the estimated temperature according to the first equation.
また、本発明に係る温度測定方法は、生体の内部の温度を、センサにより検出された温度を基に測定する温度測定方法であって、前記センサにおいて、前記生体に接触する面近傍の第１の温度を測定し、前記第１の温度が測定される位置と異なる位置で第２の温度を測定し、センサ被覆部の表面近傍で外部温度を測定するステップと、前記第１の温度と前記第２の温度の差を基に熱流束を算出するステップと、前記熱流束の時間微分を算出するステップと、前記熱流束の時間微分が対流検出閾値を超える場合に、前記外部温度の時間微分を算出するステップと、前記外部温度の時間微分を温度検出閾値と比較することにより、前記生体の内部の温度の推定温度の算出式を決定するステップとを備え、前記推定温度の算出式が、前記熱流束に基づく第１の式と、前記第１の式による推定温度を補正する第２の式とのいずれかであることを特徴とする。
Further, the temperature measuring method according to the present invention is a temperature measuring method for measuring the temperature inside the living body based on the temperature detected by the sensor, and is the first method in the vicinity of the surface in contact with the living body in the sensor. The step of measuring the temperature of the first temperature, measuring the second temperature at a position different from the position where the first temperature is measured, and measuring the external temperature near the surface of the sensor covering portion, and the first temperature and the above. A step of calculating the heat flux based on the second temperature difference, a step of calculating the time differentiation of the heat flux, and a time differentiation of the external temperature when the time differentiation of the heat flux exceeds the convection detection threshold. The calculation formula of the estimated temperature includes a step of calculating the estimated temperature of the temperature inside the living body by comparing the time differentiation of the external temperature with the temperature detection threshold. It is characterized by being one of a first equation based on the heat flux and a second equation for correcting the estimated temperature according to the first equation.
また、本発明に係る温度測定装置は、生体の内部の温度を、センサにより検出された温度を基に測定する温度測定装置であって、前記生体に接触する面近傍に配置され、第１の温度を測定する第１の温度計素子と、第１の温度計素子から離れた位置に配置され、第２の温度を測定する第２の温度計素子とを有する前記センサと、前記センサの被覆部に配置され、外部温度を測定する第３の温度計素子と、前記外部温度の時間微分に基づいて、前記生体の内部の温度の推定温度の算出式を、前記第１の温度と前記第２の温度との差分より算出される熱流束に基づく第１の式と、前記第１の式による推定温度を補正する第２の式とのいずれかに決定して、前記推定温度を算出する演算部とを備える。
Further, the temperature measuring device according to the present invention is a temperature measuring device that measures the temperature inside the living body based on the temperature detected by the sensor, and is arranged in the vicinity of the surface in contact with the living body, and is the first. The sensor having a first thermometer element for measuring a temperature, a second thermometer element arranged at a position away from the first thermometer element, and a second thermometer element for measuring a second temperature, and a coating of the sensor. A third thermometer element that is arranged in the unit and measures the external temperature, and a formula for calculating the estimated temperature of the internal temperature of the living body based on the time differentiation of the external temperature are obtained by the first temperature and the first temperature. The estimated temperature is calculated by determining either the first equation based on the heat flux calculated from the difference from the temperature of 2 or the second equation for correcting the estimated temperature by the first equation. It is equipped with a calculation unit.
また、本発明に係る温度測定プログラムは、生体の内部の温度を、センサにより検出された温度を基に測定する温度測定装置に対し、外部温度の時間微分に基づいて、前記生体の内部の温度の推定温度の算出式を、前記センサにおける前記生体近傍の一の箇所の温度と他の箇所の温度との差分より算出される熱流束に基づく第１の式と、前記第１の式による推定温度を補正する第２の式とのいずれかに決定して、前記推定温度を算出する処理を実行させることを特徴とし、温度測定装置を機能させる。
Further, the temperature measurement program according to the present invention measures the temperature inside the living body based on the temperature detected by the sensor with respect to the temperature inside the living body based on the time differentiation of the external temperature. The estimation formula of the estimated temperature of the above is the first formula based on the heat flux calculated from the difference between the temperature of one place near the living body and the temperature of the other place in the sensor, and the estimation by the first formula. The temperature measuring device is made to function by determining one of the second equations for correcting the temperature and executing the process of calculating the estimated temperature.
本発明によれば、生体内部の温度を非侵襲に精度良く測定する温度測定装置、方法およびプログラムを提供できる。
According to the present invention, it is possible to provide a temperature measuring device, a method and a program for non-invasively and accurately measuring the temperature inside a living body.
図１は、本実施の形態に係る方法を説明するための温度の経時変化の概要図である。図１は、前述の図８に基づくものであり、風を当てた時の温度変化を示す。実線１１は真の内部温度、点線１２は式（１）により算出される推定温度Ｔｃｏｒｅを示す。
FIG. 1 is a schematic diagram of a change over time in temperature for explaining the method according to the present embodiment. FIG. 1 is based on FIG. 8 described above, and shows a temperature change when a wind is applied. The solid line 11 shows the true internal temperature, and the dotted line 12 shows the estimated temperature Tcore calculated by the equation (1).
Ｔｃｏｒｅ ＝ Ｔｓｋｉｎ ＋ Ｒｂｏｄｙ × Ｈｓｋｉｎ（１）
Tcore = Tskin + Rbody x Hskin (1)
ここで、Ｈｓｋｉｎは熱流束であり、Ｈｓｋｉｎ＝（Ｔｓｋｉｎ－Ｔｔ）／Ｒｓで表され、ＴｓｋｉｎとＴｔの差分より算出される。また、Ｔｓｋｉｎはセンサにおける表面（例えば、生体と接する面）近傍の温度、Ｔｔはセンサにおける裏面（例えば、外気と接する側の面）近傍の温度であり、Ｒｂｏｄｙは生体の熱抵抗、Ｒｓはセンサの熱抵抗である。
Here, Hskin is a heat flux, is represented by Hskin = (Tskin-Tt) / Rs, and is calculated from the difference between Tskin and Tt. Further, Tskin is the temperature near the front surface (for example, the surface in contact with the living body) of the sensor, Tt is the temperature near the back surface (for example, the surface in contact with the outside air) of the sensor, Rbody is the thermal resistance of the living body, and Rs is the sensor. The thermal resistance of.
風を当てたことにより、対流の開始にともなう熱輸送形態の変化が生じると、推定温度１２には正のピーク（上に凸）が発現する。また、風を停止して対流の終了にともなう熱輸送形態（対流）の変化が生じると、推定温度１２には負のピーク（下に凸）が発現する。
When the heat transport mode changes with the start of convection due to the application of wind, a positive peak (convex upward) appears at the estimated temperature 12. Further, when the wind is stopped and the heat transport mode (convection) changes with the end of convection, a negative peak (convex downward) appears at the estimated temperature 12.
このように、推定温度１２には、内部温度１１に比べて、誤差が生じるので、正確な推定温度を算出するためには、この誤差を含む推定温度１２を補正する必要がある。
As described above, since the estimated temperature 12 has an error as compared with the internal temperature 11, it is necessary to correct the estimated temperature 12 including this error in order to calculate an accurate estimated temperature.
推定温度の補正においては、まず、補正を要するとき、すなわち熱輸送形態（対流）の変化が生じるときを検知する必要がある。図１に示すように、推定温度１２の変化は、生体やセンサの熱容量に依存するため、緩やかである。そこで、推定温度１２の変化より熱輸送形態を検出して、推定温度１２を補正することは難しい。そこで、本実施の形態においては、熱流束Ｈｓｋｉｎの時間微分ｄＨｓｋｉｎを用いて熱輸送形態の変化を検出して、推定温度１２における誤差を補正する。
In the correction of the estimated temperature, it is first necessary to detect when the correction is required, that is, when the heat transport mode (convection) changes. As shown in FIG. 1, the change in the estimated temperature 12 is gradual because it depends on the heat capacity of the living body and the sensor. Therefore, it is difficult to correct the estimated temperature 12 by detecting the heat transport mode from the change in the estimated temperature 12. Therefore, in the present embodiment, the change in the heat transport mode is detected by using the time derivative dHskin of the heat flux Hskin, and the error at the estimated temperature 12 is corrected.
図２に、図１に示す温度の経時変化における熱流束Ｈｓｋｉｎの時間微分ｄＨｓｋｉｎを示す。推定温度の変化と異なり、時間微分ｄＨｓｋｉｎは熱輸送形態が変化すると鋭敏に変化し急峻なピーク２１、２２を発現するので、その時刻を特定することが容易になる。
FIG. 2 shows the time derivative dHskin of the heat flux Hskin with respect to the time course of the temperature shown in FIG. Unlike the change in the estimated temperature, the time derivative dHskin changes sharply when the heat transport mode changes and expresses steep peaks 21 and 22, so that it becomes easy to specify the time.
また、推定温度Ｔｃｏｒｅは、以下の式により、補正して算出することができる。
Further, the estimated temperature Tcore can be corrected and calculated by the following formula.
Ｔｃｏｒｅ ＝ Ｔｓｋｉｎ ＋ α × Ｒｂｏｄｙ × Ｈｓｋｉｎ （２）
Tcore = Tskin + α x Rbody x Hskin (2)
ここで、αは補正係数であり、１．０３～１．１５であることが望ましい。本実施の形形態では、α ＝ １．０５とする。このように、式（２）は式（１）による推定温度を補正するものである。
Here, α is a correction coefficient, and it is desirable that it is 1.03 to 1.15. In this embodiment, α = 1.05. As described above, the equation (2) corrects the estimated temperature according to the equation (1).
以上のように、推定温度には対流変化により誤差が生じるため、対流変化の検知を契機に補正を行う。具体的には、熱流束Ｈｓｋｉｎの時間微分ｄＨｓｋｉｎが基準値（閾値）を超えた場合に対流変化が生じたと判定して補正を行う。
As described above, an error occurs in the estimated temperature due to the convection change, so the correction is performed when the convection change is detected. Specifically, when the time derivative dHskin of the heat flux Hskin exceeds the reference value (threshold value), it is determined that a convection change has occurred and correction is performed.
しかしながら、外気温や室内温度などのセンサ外部の環境温度（以下、「外部温度」という。）が変化したときも同様に、Ｈｓｋｉｎの時間微分ｄＨｓｋｉｎが閾値を超える。その結果、対流変化が生じていないにもかかわらず、対流変化が生じたものと誤認識（検知）することになる。この場合には、本来用いるべき式（１）ではなく式（２）を用いて推定温度が算出されるため、誤差が生じる。
However, when the environmental temperature outside the sensor (hereinafter referred to as "external temperature") such as the outside air temperature and the room temperature changes, the time derivative dHskin of Hskin also exceeds the threshold value. As a result, even though the convection change has not occurred, it is erroneously recognized (detected) that the convection change has occurred. In this case, since the estimated temperature is calculated using the formula (2) instead of the formula (1) that should be originally used, an error occurs.
この測定誤差を解消するために、本実施の形態では、外部温度を測定する温度計をさらに備え、この温度計による測定温度Ｔａｉｒの時間微分ｄＴａｉｒを用いて、ｄＨｓｋｉｎの変化が対流変化によるものか、外部温度の変化によるものかを判定する。以下に詳細を説明する。
In order to eliminate this measurement error, in the present embodiment, a thermometer for measuring the external temperature is further provided, and the time differential dTair of the measured temperature Tair by this thermometer is used to determine whether the change in dHskin is due to the convection change. , Determine if it is due to a change in external temperature. Details will be described below.
＜第１の実施の形態＞
本発明の第１の実施の形態について図１～図５を参照して説明する。 <First Embodiment>
The first embodiment of the present invention will be described with reference to FIGS. 1 to 5.
本発明の第１の実施の形態について図１～図５を参照して説明する。 <First Embodiment>
The first embodiment of the present invention will be described with reference to FIGS. 1 to 5.
＜温度測定装置の構成＞
図３Ａに、本実施の形態に係る温度測定装置３０の構成のブロック図を示す。温度測定装置３０は、測定部（センサ）３１と、記憶部３２と、演算部３３と、出力部３４とを備える。 <Configuration of temperature measuring device>
FIG. 3A shows a block diagram of the configuration of thetemperature measuring device 30 according to the present embodiment. The temperature measuring device 30 includes a measuring unit (sensor) 31, a storage unit 32, a calculation unit 33, and an output unit 34.
図３Ａに、本実施の形態に係る温度測定装置３０の構成のブロック図を示す。温度測定装置３０は、測定部（センサ）３１と、記憶部３２と、演算部３３と、出力部３４とを備える。 <Configuration of temperature measuring device>
FIG. 3A shows a block diagram of the configuration of the
図３Ｂに、温度測定装置３０における測定部３１の構成を示す。測定部３１は、第１の温度計素子３１１１と、第２の温度計素子３１１２とを有するセンサ３１１と、第３の温度計素子３１２１を有するセンサ被覆部３１２とを備える。
FIG. 3B shows the configuration of the measuring unit 31 in the temperature measuring device 30. The measuring unit 31 includes a sensor 311 having a first thermometer element 3111, a second thermometer element 3112, and a sensor covering unit 312 having a third thermometer element 3121.
センサ３１１において、第１の温度計素子３１１１は、被測定物（例えば、生体）の表面と接触する面近傍に配置され、センサ３１１の表面近傍での温度Ｔｓｋｉｎ（第１の温度）を測定する。また、第２の温度計素子３１１２は、センサ３１１の裏面（表面に対向する面）近傍で、温度Ｔｔ（第２の温度）を測定する。
In the sensor 311, the first thermometer element 3111 is arranged near the surface in contact with the surface of the object to be measured (for example, a living body), and measures the temperature Tskin (first temperature) near the surface of the sensor 311. .. Further, the second thermometer element 3112 measures the temperature Tt (second temperature) in the vicinity of the back surface (the surface facing the front surface) of the sensor 311.
ここで、温度Ｔｔを測定する箇所は、測定部３１の裏面近傍に限らず、温度Ｔｓｋｉｎを測定する箇所とは異なる箇所であればよく、温度Ｔｓｋｉｎを測定する箇所すなわち第１の温度計素子３１１１から離れた箇所であることが望ましい。第２の温度計素子３１１２は、第１の温度と第２の温度から正確に熱流束を算出できる程度離れた箇所に配置されればよい。
Here, the place where the temperature Tt is measured is not limited to the vicinity of the back surface of the measuring unit 31, and may be a place different from the place where the temperature Tskin is measured, that is, the place where the temperature Tskin is measured, that is, the first thermometer element 3111. It is desirable to be away from. The second thermometer element 3112 may be arranged at a position far enough away from the first temperature and the second temperature so that the heat flux can be accurately calculated.
センサ被覆部３１２は、通気性が良いメッシュ状等の素材で構成され、対流を妨げない。
メッシュ状等の素材には、布製のメッシュシート、空気メッシュ状に空気孔の樹脂または金属膜などを用いることができる。 Thesensor covering portion 312 is made of a material such as a mesh having good air permeability and does not interfere with convection.
As the material such as mesh, a mesh sheet made of cloth, a resin or a metal film having air holes in the air mesh, or the like can be used.
メッシュ状等の素材には、布製のメッシュシート、空気メッシュ状に空気孔の樹脂または金属膜などを用いることができる。 The
As the material such as mesh, a mesh sheet made of cloth, a resin or a metal film having air holes in the air mesh, or the like can be used.
センサ被覆部３１２の表面（外気などのセンサ外部環境と接する面）近傍に、第３の温度計素子３１２１が配置され、外部温度Ｔａｉｒを測定する。
A third thermometer element 3121 is arranged near the surface of the sensor covering portion 312 (a surface in contact with the sensor external environment such as outside air) to measure the external temperature Tair.
また、本実施の形態では、３個の温度計素子を用いるが、３個に限らず複数であればよい。複数の温度計素子を用いた方が精度よく熱流束を測定できる。
Further, in the present embodiment, three thermometer elements are used, but the number is not limited to three and may be plural. It is possible to measure the heat flux more accurately by using a plurality of thermometer elements.
記憶部３２は、測定部３１で測定される測定時刻と測定温度を記憶し、本実施の形態に係る温度測定に必要な時定数、基準値（閾値）、補正係数などの数値等を記憶する。また、演算部３３の算出部３３１で式（１）と式（２）により算出される推定温度を記憶することもできる。
The storage unit 32 stores the measurement time and the measurement temperature measured by the measurement unit 31, and stores numerical values such as a time constant, a reference value (threshold), and a correction coefficient required for temperature measurement according to the present embodiment. .. Further, the calculation unit 331 of the calculation unit 33 can store the estimated temperature calculated by the equations (1) and (2).
演算部３３において、算出部３３１は、式（１）と式（２）により推定温度を算出する。また、算出部３３１は、熱流束やその時間微分、外部温度の時間微分などの本実施の形態に係る温度測定に必要な数値等について算出、演算する。
In the calculation unit 33, the calculation unit 331 calculates the estimated temperature by the equations (1) and (2). Further, the calculation unit 331 calculates and calculates the heat flux, its time derivative, the time derivative of the external temperature, and other numerical values necessary for temperature measurement according to the present embodiment.
また、比較部３３２は、算出部３３１で算出される熱流束の時間微分ｄＨｓｋｉｎを基準値と比較する。また、算出部３３１で算出される外部温度の時間微分ｄＴａｉｒを基準値と比較する。また、比較の結果に基づき、推定温度の算出式を決定する。
Further, the comparison unit 332 compares the time derivative dHskin of the heat flux calculated by the calculation unit 331 with the reference value. Further, the time derivative dTair of the external temperature calculated by the calculation unit 331 is compared with the reference value. In addition, the calculation formula of the estimated temperature is determined based on the result of the comparison.
出力部３４は、式（１）と式（２）により算出される推定温度を出力（表示）する。正確な温度を出力できない場合には、ブランク（何も表示しない状態）や正確な温度を測定できないことを出力（表示）することもできる。
The output unit 34 outputs (displays) the estimated temperature calculated by the equations (1) and (2). When the accurate temperature cannot be output, it is possible to output (display) a blank (state in which nothing is displayed) or the inability to measure the accurate temperature.
＜温度測定方法＞
本実施の形態に係る方法の概要を、図４を参照して説明する。図４に、本実施の形態に係る温度測定方法のフローチャート図を示す。 <Temperature measurement method>
An outline of the method according to the present embodiment will be described with reference to FIG. FIG. 4 shows a flowchart of the temperature measuring method according to the present embodiment.
本実施の形態に係る方法の概要を、図４を参照して説明する。図４に、本実施の形態に係る温度測定方法のフローチャート図を示す。 <Temperature measurement method>
An outline of the method according to the present embodiment will be described with reference to FIG. FIG. 4 shows a flowchart of the temperature measuring method according to the present embodiment.
初めに、センサ（測定部）により、センサの表面温度（生体と接する部分の温度、第１の温度）Ｔｓｋｉｎと、センサの裏面温度（第２の温度）Ｔｔ、外部温度（第３の温度）Ｔａｉｒを測定する（ステップ４０１）。
First, by the sensor (measurement unit), the surface temperature of the sensor (temperature of the part in contact with the living body, the first temperature) Tskin, the back surface temperature of the sensor (second temperature) Tt, and the external temperature (third temperature) Measure the temperature (step 401).
次に、式（１）により、推定温度を算出する（ステップ４０２）。
Next, the estimated temperature is calculated by the formula (1) (step 402).
次に、熱流束Ｈｓｋｉｎの時間微分ｄＨｓｋｉｎを算出する（ステップ４０３）。ｄＨｓｋｉｎは、隣接するサンプリング（測定）時刻での熱流束Ｈｓｋｉｎの差分として算出する。ここで、例えば、隣接するサンプリング（測定）時刻の間隔は１秒程度である。
Next, the time derivative dHskin of the heat flux Hskin is calculated (step 403). The dHskin is calculated as the difference between the heat flux Hskins at the adjacent sampling (measurement) times. Here, for example, the interval between adjacent sampling (measurement) times is about 1 second.
例えば、時刻ｔａでＴｓｋｉｎ（ｔａ）とＴｔ（ｔａ）が測定されるとき、Ｈｓｋｉｎ（ｔａ）は、Ｈｓｋｉｎ（ｔａ）＝｛Ｔｓｋｉｎ（ｔａ）－Ｔｔ（ｔａ）｝／Ｒｓで算出される。
For example, when Tskin (ta) and Tt (ta) are measured at time ta, Hskin (ta) is calculated by Hskin (ta) = {Tskin (ta) -Tt (ta)} / Rs.
同様に、時刻ｔａに引き続き、時刻ｔｂでＴｓｋｉｎ（ｔｂ）とＴｔ（ｔｂ）が測定されるとき、Ｈｓｋｉｎ（ｔｂ）は、Ｈｓｋｉｎ（ｔｂ）＝｛Ｔｓｋｉｎ（ｔｂ）－Ｔｔ（ｔｂ）｝／Ｒｓで算出される。
Similarly, when Tskin (tb) and Tt (tb) are measured at time tb following time ta, Hskin (tb) is Hskin (tb) = {Tskin (tb) -Tt (tb)} / Rs. It is calculated by.
このとき、ｄＨｓｋｉｎは、ｄＨｓｋｉｎ＝Ｈｓｋｉｎ（ｔｂ）－Ｈｓｋｉｎ（ｔａ）で算出される。
At this time, dHskin is calculated by dHskin = Hskin (tb) -Hskin (ta).
ここで、ｔａとｔｂは隣接するサンプリング（測定）時刻でなくてもよく、所定の間隔を有してもよい。
Here, ta and tb do not have to be adjacent sampling (measurement) times, and may have a predetermined interval.
次に、ｄＨｓｋｉｎの値が基準値（以下、「対流検出閾値」という。）ｄＨｓｋｉｎ＿ｔｈｒｅｓを比較する（ステップ４０４）。
Next, the dHskin value is compared with the reference value (hereinafter referred to as “convection detection threshold”) dHskin_thres (step 404).
ｄＨｓｋｉｎが対流検出閾値ｄＨｓｋｉｎ＿ｔｈｒｅｓ以下の場合には（｜ｄＨｓｋｉｎ｜≦ｄＨｓｋｉｎ＿ｔｈｒｅｓ）、対流によって熱伝達の形態が変化していないと判定して、以下のステップを行わず、上述のＴｃｏｒｅを、この時刻での推定温度と決定して、引き続き、次の時刻で測定を実行する。
When dHskin is equal to or less than the convection detection threshold dHskin_thres (| dHskin | ≦ dHskin_thres), it is determined that the form of heat transfer has not changed due to convection. Determine the estimated temperature of and continue to measure at the next time.
一方、ｄＨｓｋｉｎが対流検出閾値ｄＨｓｋｉｎ＿ｔｈｒｅｓを上回る場合には（｜ｄＨｓｋｉｎ｜＞ｄＨｓｋｉｎ＿ｔｈｒｅｓ）、このｄＨｓｋｉｎの変化が対流の変化によるものか、外部温度の変化など他の要因によるものかを、以下の通り、判定する。ここで、対流検出閾値ｄＨｓｋｉｎ＿ｔｈｒｅｓは、例えば、０．０２℃／ｓｅｃとする。
On the other hand, when dHskin exceeds the convection detection threshold dHskin_thres (| dHskin |> dHskin_thres), whether the change in dHskin is due to a change in convection or another factor such as a change in external temperature is as follows. judge. Here, the convection detection threshold dHskin_thres is set to, for example, 0.02 ° C./sec.
次に、外部温度Ｔａｉｒの時間微分ｄＴａｉｒを算出する（ステップ４０５）。ｄＴａｉｒは、隣接するサンプリング（測定）時刻での外部温度Ｔａｉｒの差分として算出する。
Next, the time derivative dTair of the external temperature Tair is calculated (step 405). dTair is calculated as the difference between the external temperature Tires at adjacent sampling (measurement) times.
例えば、時刻ｔｃでＴａｉｒ（ｔｃ）が測定され、引き続き、時刻ｔｄでＴａｉｒ（ｔｄ）が測定されるとき、ｄＴａｉｒは、ｄＴａｉｒ＝Ｔａｉｒ（ｔｄ）－Ｔａｉｒ（ｔｃ）で算出される。
For example, when Tair (tc) is measured at time ct and then Tair (td) is measured at time td, dTair is calculated by dTair = Tair (td) -Tair (tt).
ここで、ｔｃとｔｄは隣接するサンプリング（測定）時刻でなくてもよく、所定の間隔を有してもよい。
Here, tc and td do not have to be adjacent sampling (measurement) times, and may have a predetermined interval.
次に、ｄＴａｉｒの値が基準値（以下、「温度検出閾値」という。）ｄＴａｉｒ＿ｔｈｒｅｓを比較する（ステップ４０６）。
Next, the dTair value is compared with the reference value (hereinafter referred to as “temperature detection threshold”) dTair_thres (step 406).
ｄＴａｉｒが温度検出閾値ｄＴａｉｒ＿ｔｈｒｅｓを上回る場合には（｜ｄＴａｉｒ｜＞ｄＴａｉｒ＿ｔｈｒｅｓ）、熱流束の変化が外部温度の変化によるものであり、対流変化によるものでないと判定する。そこで、推定温度の算出式を変更することなく、推定温度を算出する（ステップ４０７）。
When dTair exceeds the temperature detection threshold dTair_thres (| dTair |> dTair_thres), it is determined that the change in heat flux is due to the change in external temperature and not due to the convection change. Therefore, the estimated temperature is calculated without changing the calculation formula of the estimated temperature (step 407).
この場合、例えば、対流変化が生じていない状態で式（１）により推定温度を算出しているときには、対流状態は変化しないので、判定後も式（１）により推定温度を算出する。同様に、対流変化が生じている状態で式（２）により推定温度を算出しているときには、判定後も式（２）により推定温度を算出する。
In this case, for example, when the estimated temperature is calculated by the equation (1) in the state where the convection change does not occur, the convection state does not change, so the estimated temperature is calculated by the equation (1) even after the determination. Similarly, when the estimated temperature is calculated by the equation (2) in the state where the convection change occurs, the estimated temperature is calculated by the equation (2) even after the determination.
ここで、温度検出閾値ｄＴａｉｒ＿ｔｈｒｅｓは、例えば、０．０２℃／ｓｅｃとする。
Here, the temperature detection threshold dTair_thres is, for example, 0.02 ° C./sec.
一方、ｄＴａｉｒが温度検出閾値ｄＴａｉｒ＿ｔｈｒｅｓ以下の場合には（｜ｄＴａｉｒ｜≦ｄＴａｉｒ＿ｔｈｒｅｓ）、熱流束の変化が外部温度の変化によるものでなく、対流変化によるものと判定する。そこで、対流変化にともない推定温度の算出式を変更して、推定温度を算出する（ステップ４０８）。
On the other hand, when dTair is equal to or less than the temperature detection threshold dTair_thres (| dTair | ≦ dTair_thres), it is determined that the change in heat flux is not due to the change in the external temperature but due to the convection change. Therefore, the estimated temperature is calculated by changing the formula for calculating the estimated temperature according to the change in convection (step 408).
この場合、例えば、対流変化が生じていない状態で式（１）により推定温度を算出しているときには、対流の開始が判定されるので、判定後は式（２）により推定温度を算出する。また、対流変化が生じている状態で式（２）により推定温度を算出しているときには、対流の終了が判定されるので、判定後は式（１）により推定温度を算出する。
In this case, for example, when the estimated temperature is calculated by the equation (1) in the state where the convection change does not occur, the start of the convection is determined, and after the determination, the estimated temperature is calculated by the equation (2). Further, when the estimated temperature is calculated by the equation (2) in the state where the convection change occurs, the end of the convection is determined. Therefore, after the determination, the estimated temperature is calculated by the equation (1).
＜実施例＞
本実施の形態に係る温度測定方法の一例としての実施例を、図５を参照に説明する。 <Example>
An embodiment as an example of the temperature measuring method according to the present embodiment will be described with reference to FIG.
本実施の形態に係る温度測定方法の一例としての実施例を、図５を参照に説明する。 <Example>
An embodiment as an example of the temperature measuring method according to the present embodiment will be described with reference to FIG.
図５に、本実施の形態に係る温度測定方法における、熱流束の時間微分ｄＨｓｋｉｎの経時変化５１と外部温度の時間微分ｄＴａｉｒの経時変化５２を示す。
FIG. 5 shows the time-dependent change 51 of the time derivative dHskin of the heat flux and the time-dependent change 52 of the time derivative dTair of the external temperature in the temperature measuring method according to the present embodiment.
また、推定温度の経時変化５３は、本実施の形態に係る実施例の温度測定方法による推定温度５３１と、比較例として、外部温度の変化を考慮しない温度測定方法による推定温度５３２を示す。また、真の内部温度５３０として、鼓膜で測定される温度を示す。
Further, the time-dependent change 53 of the estimated temperature indicates the estimated temperature 531 by the temperature measuring method of the embodiment according to the present embodiment and the estimated temperature 532 by the temperature measuring method not considering the change of the external temperature as a comparative example. Further, the temperature measured by the eardrum is shown as the true internal temperature 530.
対流変化が生じていない状態から温度測定を開始する場合を一例として説明する。初めに、推定温度５２は、対流が生じていないので、式（１）で算出される。
The case where the temperature measurement is started from the state where the convection change does not occur will be described as an example. First, the estimated temperature 52 is calculated by the equation (1) because no convection has occurred.
次に、時刻ｔ１でｄＨｓｋｉｎ５１が基準値（閾値）５１１を超えるとき、外部温度の時間微分ｄＴａｉｒ５２は変化しない。したがって、ｄＨｓｋｉｎ５１の変化は対流変化によるものと判定し、算出式を変更して、式（２）により推定温度を算出する。
Next, when dHskin51 exceeds the reference value (threshold value) 511 at time t1, the time derivative dTair52 of the external temperature does not change. Therefore, it is determined that the change in dHskin51 is due to the convection change, the calculation formula is changed, and the estimated temperature is calculated by the formula (2).
次に、時刻ｔ２でｄＨｓｋｉｎ５１が基準値（閾値）５１１を超えたとき、外部温度の時間微分ｄＴａｉｒ５２が変化して基準値（閾値）５２１を超える。したがって、ｄＨｓｋｉｎ５１の変化は外部温度の変化によるものであり、対流変化によるものでないと判定し、算出式を変更することなく、式（２）により推定温度を算出する。
Next, when dHskin51 exceeds the reference value (threshold value) 511 at time t2, the time derivative dTair52 of the external temperature changes and exceeds the reference value (threshold value) 521. Therefore, it is determined that the change in dHskin 51 is due to the change in the external temperature and not due to the convection change, and the estimated temperature is calculated by the formula (2) without changing the calculation formula.
本実施の形態に係る実施例の温度測定方法により算出される推定温度５３１では、時刻ｔ１以降、推定温度は対流変化による補正を含む式（２）により算出されて、内部温度５３０と同等の温度を示す。また、時刻ｔ２で、ｄＨｓｋｉｎ５１の変化が外部温度の変化によるものであり、対流状態は変化せず、すなわち、対流は終了しないので、ｔ２以前と同様に、推定温度は式（２）より算出されて、内部温度５３０と同等の温度を示す。
In the estimated temperature 531 calculated by the temperature measuring method of the embodiment according to the present embodiment, the estimated temperature is calculated by the equation (2) including the correction by the convection change after the time t1, and is the same temperature as the internal temperature 530. Is shown. Further, at time t2, the change in dHskin51 is due to the change in the external temperature, and the convection state does not change, that is, the convection does not end. Therefore, the estimated temperature is calculated from the equation (2) as before t2. The temperature is equivalent to the internal temperature of 530.
一方、比較例の推定温度５３２では、時刻ｔ１以降、推定温度は対流変化による補正を含む式（２）により算出されて、内部温度５３０と同等の温度を示す。しかしながら、時刻ｔ２で、ｄＨｓｋｉｎ５１の変化が外部温度の変化によるものであるにもかかわらず、対流状態の変化によるものと誤認される。その結果、対流が終了したものとみなされ、推定温度は式（１）より算出されるので、内部温度５３０と差異（誤差）が生じる。
On the other hand, in the estimated temperature 532 of the comparative example, after the time t1, the estimated temperature is calculated by the equation (2) including the correction by the convection change, and shows the same temperature as the internal temperature 530. However, at time t2, although the change in dHskin51 is due to the change in the external temperature, it is misidentified as due to the change in the convection state. As a result, it is considered that the convection has ended, and the estimated temperature is calculated from the equation (1), so that a difference (error) from the internal temperature 530 occurs.
このように、本実施の形態に係る温度測定方法によれば、気温変化発生時に対流変化の誤認識をすることなく、高精度で生体内部の温度を測定できる。
As described above, according to the temperature measuring method according to the present embodiment, it is possible to measure the temperature inside the living body with high accuracy without erroneously recognizing the convection change when the temperature change occurs.
本発明に係る実施の形態では、熱流束の時間微分ｄＨｓｋｉｎの変化を正負で測定することにより、対流発生と対流終了を検出できる。例えば、ｄＨｓｋｉｎの変化が０以上の時に、対流開始にともなう熱伝導の形態の変化を検出して、ｄＨｓｋｉｎの変化が０未満の時に、対流終了にともなう熱伝導の形態の変化を検出することにより、対流期間を検出できる。
In the embodiment of the present invention, the generation of convection and the end of convection can be detected by measuring the change of the time derivative dHskin of the heat flux in positive and negative directions. For example, when the change in dHskin is 0 or more, the change in the morphology of heat conduction accompanying the start of convection is detected, and when the change in dHskin is less than 0, the change in the morphology of heat conduction accompanying the end of convection is detected. , The convection period can be detected.
本発明に係る実施の形態では、熱流束の時間微分の変化が検知されずに対流が生じていない場合には、測定部（センサ）３１で測定された温度を基に、順次演算部３３で算出される推定温度が、出力部３４に出力される。
In the embodiment of the present invention, when the change in the time derivative of the heat flux is not detected and the convection does not occur, the calculation unit 33 sequentially uses the temperature measured by the measurement unit (sensor) 31. The calculated estimated temperature is output to the output unit 34.
一方、熱流束の時間微分の変化が検知される場合には、測定部（センサ）３１で測定された後に、演算部３３で外部温度の時間微分を基に判定して算出式が決定され、推定温度が算出され、出力部３４に出力される。このように、本発明に係る実施の形態では、記憶部３２を必ずしも必要としない。
On the other hand, when a change in the time derivative of the heat flux is detected, after the measurement is performed by the measuring unit (sensor) 31, the calculation unit 33 determines based on the time derivative of the external temperature and determines the calculation formula. The estimated temperature is calculated and output to the output unit 34. As described above, the embodiment of the present invention does not necessarily require the storage unit 32.
また、測定部（センサ）で測定された温度をまとめて記憶部に記憶してから、温度データを読み出して（読み込んで）推定温度を算出してもよい。
Alternatively, the temperature measured by the measuring unit (sensor) may be collectively stored in the storage unit, and then the temperature data may be read out (read) to calculate the estimated temperature.
本実施の形態に係る温度測定装置は、ウェアラブルデバイス一体としてユーザの身体に装着されてもよい。
The temperature measuring device according to the present embodiment may be attached to the user's body as an integral part of the wearable device.
または、本発明に係る実施の形態に係る温度測定装置は、測定部（センサ）３１をウェアラブルデバイスとしてユーザの身体に装着して、ウェアラブルデバイス外部のスマートフォンやサーバ等に記憶部３２、演算部３３を備えてもよい。この場合、温度測定装置はウェアラブルデバイスと外部のサーバ等それぞれに送受信部を備え、ウェアラブルデバイスで測定される測定温度をサーバ等に送信し、サーバ等で記憶、計算を行う。最後に、推定温度等（深部温度は測定されないことの表示等を含む）はサーバ等に出力されてもよいし、ウェアラブルデバイス等に送信されて出力されてもよい。
Alternatively, in the temperature measuring device according to the embodiment of the present invention, the measuring unit (sensor) 31 is attached to the user's body as a wearable device, and the storage unit 32 and the calculation unit 33 are stored in a smartphone or server outside the wearable device. May be provided. In this case, the temperature measuring device is provided with a transmission / reception unit for each of the wearable device and an external server, etc., and the measured temperature measured by the wearable device is transmitted to the server or the like, and is stored and calculated by the server or the like. Finally, the estimated temperature and the like (including the display that the deep temperature is not measured) may be output to the server or the like, or may be transmitted to the wearable device or the like and output.
＜コンピュータの構成例＞
図６に、本発明の実施の形態に係る温度測定装置におけるコンピュータ６０の構成例を示す。温度測定装置は、ＣＰＵ（Ｃｅｎｔｒａｌ Ｐｒｏｃｅｓｓｉｎｇ Ｕｎｉｔ）６３、記憶装置（記憶部）６２およびインタフェース装置６１を備えたコンピュータ６０と、これらのハードウェア資源を制御するプログラムによって実現することができる。ここで、インタフェース装置に、測定部と、出力部が接続される。ＣＰＵは、記憶装置に格納された温度測定プログラムに従って本発明の実施の形態における処理を実行する。このように、温度測定プログラムは温度測定装置を機能させる。 <Computer configuration example>
FIG. 6 shows a configuration example of thecomputer 60 in the temperature measuring device according to the embodiment of the present invention. The temperature measuring device can be realized by a computer 60 including a CPU (Central Processing Unit) 63, a storage device (storage unit) 62, and an interface device 61, and a program for controlling these hardware resources. Here, the measurement unit and the output unit are connected to the interface device. The CPU executes the process according to the embodiment of the present invention according to the temperature measurement program stored in the storage device. In this way, the temperature measurement program makes the temperature measurement device work.
図６に、本発明の実施の形態に係る温度測定装置におけるコンピュータ６０の構成例を示す。温度測定装置は、ＣＰＵ（Ｃｅｎｔｒａｌ Ｐｒｏｃｅｓｓｉｎｇ Ｕｎｉｔ）６３、記憶装置（記憶部）６２およびインタフェース装置６１を備えたコンピュータ６０と、これらのハードウェア資源を制御するプログラムによって実現することができる。ここで、インタフェース装置に、測定部と、出力部が接続される。ＣＰＵは、記憶装置に格納された温度測定プログラムに従って本発明の実施の形態における処理を実行する。このように、温度測定プログラムは温度測定装置を機能させる。 <Computer configuration example>
FIG. 6 shows a configuration example of the
本発明の実施の形態に係る温度測定装置では、コンピュータを装置内部に備えてもよいし、コンピュータの機能の少なくとも１部を外部コンピュータを用いて実現してもよい。また、記憶部も装置外部の記憶媒体６４を用いてもよく、記憶媒体６４に格納された温度測定プログラムを読み出して実行してもよい。記憶媒体６４には、各種磁気記録媒体、光磁気記録媒体、ＣＤ－ＲＯＭ、ＣＤ－Ｒ、各種メモリを含む。また、温度測定プログラムはインターネットなどの通信回線を介してコンピュータに供給されてもよい。
In the temperature measuring device according to the embodiment of the present invention, a computer may be provided inside the device, or at least one part of the functions of the computer may be realized by using an external computer. Further, the storage unit may also use the storage medium 64 outside the apparatus, or may read out and execute the temperature measurement program stored in the storage medium 64. The storage medium 64 includes various magnetic recording media, optical magnetic recording media, CD-ROMs, CD-Rs, and various memories. Further, the temperature measurement program may be supplied to the computer via a communication line such as the Internet.
以上のように、本実施の形態に係る温度測定装置、方法およびプログラムによれば、生体内部の温度を非侵襲に精度良く測定できる。
As described above, according to the temperature measuring device, method and program according to the present embodiment, the temperature inside the living body can be measured non-invasively and accurately.
本発明の実施の形態では、温度測定装置の構成および温度測定方法等において、各構成部の構造、寸法、材料等の一例を示したが、これに限らない。温度測定装置の構成および温度測定方法等の機能を発揮し効果を奏するものであればよい。
In the embodiment of the present invention, an example of the structure, dimensions, materials, etc. of each component is shown in the configuration of the temperature measuring device, the temperature measuring method, and the like, but the present invention is not limited to this. Anything that exerts functions such as the configuration of the temperature measuring device and the temperature measuring method and exerts an effect may be used.
本発明は、作業者、競技者等の体温管理に用いる深部温度計に適用することができる。
The present invention can be applied to a deep thermometer used for body temperature control of workers, athletes and the like.
３０ 温度測定装置
３１ 測定部（センサ）
３２ 記憶部
３３ 演算部
３３１ 算出部
３３２ 比較部
３４ 出力部 30Temperature measuring device 31 Measuring unit (sensor)
32Storage unit 33 Calculation unit 331 Calculation unit 332 Comparison unit 34 Output unit
３１ 測定部（センサ）
３２ 記憶部
３３ 演算部
３３１ 算出部
３３２ 比較部
３４ 出力部 30
32
Claims (8)
- 生体の内部の温度を、センサにより検出された温度を基に測定する温度測定方法であって、
外部温度の時間微分に基づいて、前記生体の内部の温度の推定温度の算出式を、前記センサにおける前記生体近傍の一の箇所の温度と他の箇所の温度との差分より算出される熱流束に基づく第１の式と、前記第１の式による推定温度を補正する第２の式とのいずれかに決定して、前記推定温度を算出する温度測定方法。 It is a temperature measurement method that measures the temperature inside a living body based on the temperature detected by a sensor.
Based on the time derivative of the external temperature, the formula for calculating the estimated temperature of the temperature inside the living body is the heat flux calculated from the difference between the temperature of one place near the living body and the temperature of the other place in the sensor. A temperature measuring method for calculating the estimated temperature by determining one of a first equation based on the above and a second equation for correcting the estimated temperature according to the first equation. - 生体の内部の温度を、センサにより検出された温度を基に測定する温度測定方法であって、
前記センサにおいて、前記生体に接触する面近傍の第１の温度を測定し、前記第１の温度が測定される位置と異なる位置で第２の温度を測定し、センサ被覆部の表面近傍で外部温度を測定するステップと、
前記第１の温度と前記第２の温度の差を基に熱流束を算出するステップと、
前記熱流束の時間微分を算出するステップと、
前記熱流束の時間微分が対流検出閾値を超える場合に、前記外部温度の時間微分を算出するステップと、
前記外部温度の時間微分を温度検出閾値と比較することにより、前記生体の内部の温度の推定温度の算出式を決定するステップとを備え、
前記推定温度の算出式が、前記熱流束に基づく第１の式と、前記第１の式による推定温度を補正する第２の式とのいずれかである温度測定方法。 It is a temperature measurement method that measures the temperature inside a living body based on the temperature detected by a sensor.
In the sensor, the first temperature near the surface in contact with the living body is measured, the second temperature is measured at a position different from the position where the first temperature is measured, and the outside is near the surface of the sensor covering portion. Steps to measure temperature and
The step of calculating the heat flux based on the difference between the first temperature and the second temperature, and
The step of calculating the time derivative of the heat flux and
When the time derivative of the heat flux exceeds the convection detection threshold, the step of calculating the time derivative of the external temperature and the step.
A step of determining a formula for calculating an estimated temperature of the temperature inside the living body by comparing the time derivative of the external temperature with the temperature detection threshold value is provided.
A temperature measuring method in which the estimated temperature calculation formula is one of a first formula based on the heat flux and a second formula for correcting the estimated temperature according to the first formula. - 前記外部温度の時間微分が温度検出閾値を超える場合に、前記推定温度の算出式を変更することなく、前記推定温度が算出され、
前記外部温度の時間微分が温度検出閾値以下の場合に、前記推定温度の算出式を変更して、前記推定温度が算出される、請求項２に記載の温度測定方法。 When the time derivative of the external temperature exceeds the temperature detection threshold value, the estimated temperature is calculated without changing the calculation formula of the estimated temperature.
The temperature measurement method according to claim 2, wherein the estimated temperature is calculated by changing the calculation formula of the estimated temperature when the time derivative of the external temperature is equal to or less than the temperature detection threshold. - 前記第１の式が、
Ｔｃｏｒｅ ＝ Ｔｓｋｉｎ ＋ Ｒｂｏｄｙ × （Ｔｓｋｉｎ－Ｔｔ）／Ｒｓ
であり、前記第２の式が、
Ｔｃｏｒｅ ＝ Ｔｓｋｉｎ ＋ α × Ｒｂｏｄｙ × （Ｔｓｋｉｎ－Ｔｔ）／Ｒｓ
であり、Ｔｓｋｉｎが第１の温度であり、Ｔｔが第２の温度であり、Ｒｂｏｄｙは生体の熱抵抗であり、Ｒｓはセンサの熱抵抗であり、αが補正係数である、
請求項１から請求項３のいずれか一項に記載の温度測定方法。 The first equation is
Tcore = Tskin + Rbody × (Tskin-Tt) / Rs
The second equation is
Tcore = Tskin + α × Rbody × (Tskin-Tt) / Rs
Tskin is the first temperature, Tt is the second temperature, Rbody is the thermal resistance of the living body, Rs is the thermal resistance of the sensor, and α is the correction coefficient.
The temperature measuring method according to any one of claims 1 to 3. - 前記第２の式における補正係数が１．０３以上１．１５以下であることを特徴とする請求項４に記載の温度測定方法。 The temperature measuring method according to claim 4, wherein the correction coefficient in the second equation is 1.03 or more and 1.15 or less.
- 前記熱流束の時間微分が０以上のときに対流の開始にともなう熱輸送形態の変化を判定し、前記熱流束の時間微分が０より小さいときに前記対流の終了にともなう熱輸送形態の変化を判定することを特徴とする請求項１から請求項５のいずれか一項に記載の温度測定方法。 When the time derivative of the heat flux is 0 or more, the change in the heat transport mode accompanying the start of convection is determined, and when the time derivative of the heat flux is smaller than 0, the change in the heat transport mode accompanying the end of the convection is determined. The temperature measuring method according to any one of claims 1 to 5, wherein the determination is made.
- 生体の内部の温度を、センサにより検出された温度を基に測定する温度測定装置であって、
前記生体に接触する面近傍に配置され、第１の温度を測定する第１の温度計素子と、第１の温度計素子から離れた位置に配置され、第２の温度を測定する第２の温度計素子とを有する前記センサと、
前記センサの被覆部に配置され、外部温度を測定する第３の温度計素子と、
前記外部温度の時間微分に基づいて、前記生体の内部の温度の推定温度の算出式を、前記第１の温度と前記第２の温度との差分より算出される熱流束に基づく第１の式と、前記第１の式による推定温度を補正する第２の式とのいずれかに決定して、前記推定温度を算出する演算部と
を備える温度測定装置。 A temperature measuring device that measures the temperature inside a living body based on the temperature detected by a sensor.
A first thermometer element arranged near the surface in contact with the living body and measuring the first temperature, and a second thermometer element arranged at a position away from the first thermometer element and measuring the second temperature. The sensor having a thermometer element and
A third thermometer element, which is arranged on the covering portion of the sensor and measures the external temperature,
The formula for calculating the estimated temperature of the temperature inside the living body based on the time derivative of the external temperature is the first formula based on the heat flux calculated from the difference between the first temperature and the second temperature. A temperature measuring device including a calculation unit for calculating the estimated temperature by determining one of the second equation for correcting the estimated temperature according to the first equation. - 生体の内部の温度を、センサにより検出された温度を基に測定する温度測定装置に対し、
外部温度の時間微分に基づいて、前記生体の内部の温度の推定温度の算出式を、前記センサにおける前記生体近傍の一の箇所の温度と他の箇所の温度との差分より算出される熱流束に基づく第１の式と、前記第１の式による推定温度を補正する第２の式とのいずれかに決定して、前記推定温度を算出する処理を実行させることを特徴とする、温度測定装置を機能させるための温度測定プログラム。 For a temperature measuring device that measures the temperature inside a living body based on the temperature detected by a sensor.
Based on the time differentiation of the external temperature, the formula for calculating the estimated temperature of the temperature inside the living body is the heat flux calculated from the difference between the temperature of one place near the living body and the temperature of the other place in the sensor. The temperature measurement is characterized in that the process of calculating the estimated temperature is executed by determining either the first equation based on the above and the second equation for correcting the estimated temperature according to the first equation. A temperature measurement program to make the device work.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007212407A (en) * | 2006-02-13 | 2007-08-23 | Kanazawa Univ | Non-heating type deep part medical thermometer and deep part temperature measuring device using it |
| US20070282218A1 (en) * | 2006-05-31 | 2007-12-06 | Medisim Ltd. | Non-invasive temperature measurement |
| JP2012154859A (en) * | 2011-01-27 | 2012-08-16 | Terumo Corp | Clinical thermometer |
| JP2017055968A (en) * | 2015-09-16 | 2017-03-23 | カシオ計算機株式会社 | Temperature measurement device and temperature measurement method |
| JP2019211270A (en) * | 2018-06-01 | 2019-12-12 | 日本電信電話株式会社 | Internal body temperature measuring device and internal body temperature measuring method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007212407A (en) * | 2006-02-13 | 2007-08-23 | Kanazawa Univ | Non-heating type deep part medical thermometer and deep part temperature measuring device using it |
| US20070282218A1 (en) * | 2006-05-31 | 2007-12-06 | Medisim Ltd. | Non-invasive temperature measurement |
| JP2012154859A (en) * | 2011-01-27 | 2012-08-16 | Terumo Corp | Clinical thermometer |
| JP2017055968A (en) * | 2015-09-16 | 2017-03-23 | カシオ計算機株式会社 | Temperature measurement device and temperature measurement method |
| JP2019211270A (en) * | 2018-06-01 | 2019-12-12 | 日本電信電話株式会社 | Internal body temperature measuring device and internal body temperature measuring method |
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