CN114088204A - Wearable core body temperature measuring method and device - Google Patents
Wearable core body temperature measuring method and device Download PDFInfo
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- 230000036757 core body temperature Effects 0.000 title claims abstract description 72
- 238000000034 method Methods 0.000 title claims abstract description 34
- 230000036760 body temperature Effects 0.000 claims abstract description 55
- 238000009529 body temperature measurement Methods 0.000 claims abstract description 26
- 230000005540 biological transmission Effects 0.000 claims description 12
- 238000004422 calculation algorithm Methods 0.000 claims description 11
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- 238000004364 calculation method Methods 0.000 claims description 10
- 239000004973 liquid crystal related substance Substances 0.000 claims description 8
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims description 5
- 229910052753 mercury Inorganic materials 0.000 claims description 5
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- 238000005259 measurement Methods 0.000 abstract description 6
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- 230000036541 health Effects 0.000 description 2
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- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
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- 229910052697 platinum Inorganic materials 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/0022—Radiation pyrometry, e.g. infrared or optical thermometry for sensing the radiation of moving bodies
- G01J5/0025—Living bodies
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
- G01K13/20—Clinical contact thermometers for use with humans or animals
- G01K13/223—Infrared clinical thermometers, e.g. tympanic
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K5/00—Measuring temperature based on the expansion or contraction of a material
- G01K5/02—Measuring temperature based on the expansion or contraction of a material the material being a liquid
- G01K5/22—Measuring temperature based on the expansion or contraction of a material the material being a liquid with provision for expansion indicating over not more than a few degrees
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Abstract
The invention discloses a wearable core body temperature measuring method and device, relating to the technical field of wearable body temperature measurement and comprising the following steps: s1, presetting personalized body temperature model parameters; s2, the wearable device collects the skin temperature and the device temperature of the specific position of the user, and the uncalibrated core body temperature is calculated by utilizing the personalized body temperature model and the model parameters of S1; s3, inputting a reference core body temperature measured by an external core body temperature device by a user, and calculating to obtain personalized parameters of the user; s4, repeating the step S3, and updating the personalized parameters of the personalized body temperature model of the user; and S5, acquiring the skin temperature and the equipment temperature of the specific position of the user by the wearable equipment, and calculating to obtain the calibrated core body temperature through the personalized body temperature model and the personalized parameters of S4. The invention realizes the accurate measurement of the core body temperature, and is convenient for the user to operate and use in daily life.
Description
Technical Field
The invention relates to the field of wearable body temperature measurement, in particular to a wearable core body temperature measurement method and device.
Background
The core body temperature is an important physiological parameter that can reflect the health state and physiological state of a human body. If the continuous core body temperature monitoring can be carried out on the human body in life, the method has important significance, and particularly when the method is applied to the old, patients and children who cannot take care of themselves, the abnormal body temperature can be found in time, and the dangerous conditions such as heatstroke, temperature loss and the like are avoided. The existing widely applied body temperature measurement methods generally measure the positions of armpits, oral cavities, rectum and the like by devices such as a mercury thermometer, an electronic thermometer, an infrared thermometer and the like to directly obtain body temperature values, but the methods cannot realize continuous monitoring of the body temperature, are usually invasive or minimally invasive, are uncomfortable and disturbing to users in the measurement process, and do not develop corresponding wearable devices to realize continuous measurement.
In recent years, scholars have proposed wearable body temperature measurement methods which combine non-invasive, continuous and accurate measurement, and the methods mostly use skin as an optimal measurement site. Patent publication No. CN112050950A proposes a wearable device and a body temperature measurement method for the wearable device, which calculate the current ambient temperature through the temperature inside the wearable device and the skin temperature of the user, and further calculate the current body temperature, but model parameters based on the method do not take individual differences into account, are not calculated based on the data of the user, but are obtained by experimental simulation, so that the calculated model parameters are inaccurate, and the function of blood flow regulation is not taken into account in the model modeling process, which affects the performance of body temperature calculation. Patent publication CN108139274A proposes a system and method for core body temperature measurement, which includes a first thermometer for directly measuring the rectal temperature and a second thermometer for indirectly measuring the core body temperature based on a thermal flux method, the second thermometer being applied to the skin and providing long-term monitoring of the temperature, the first thermometer being used to output data for calibrating the second thermometer, and this method ensures the accuracy of the wearable method for continuously monitoring the body temperature. However, the calibration method and the measurement method adopted by the system are burdensome for most individuals, the thermal flux method adopted by the system does not take the influence of blood flow change in the human body temperature regulation process into consideration, and the accuracy of the calculation result is influenced.
Accordingly, those skilled in the art have endeavored to develop a wearable core body temperature measurement method and apparatus that enables calibration of body temperature measurements based on individual differences and dynamic blood flow changes without burdening the user.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the technical problems to be solved by the present invention are: the problems that in the prior art, when a body temperature measurement model is applied to different user groups, accuracy is low and measurement is inconvenient are solved, and the wearable core body temperature measurement method and the wearable core body temperature measurement equipment are provided.
In order to achieve the purpose, the invention provides a wearable core body temperature measuring method, which comprises the following steps:
s1, presetting personalized body temperature model parameters;
s2, the wearable device collects the skin temperature and the device temperature of the specific position of the user, and the uncalibrated core body temperature is calculated by utilizing the personalized body temperature model and the model parameters of S1;
s3, inputting a reference core body temperature measured by an external core body temperature device by a user, and calculating to obtain personalized parameters of the user;
s4, repeating the step S3, and updating the personalized parameters of the personalized body temperature model of the user;
and S5, acquiring the skin temperature and the equipment temperature of the specific position of the user by the wearable equipment, and calculating to obtain the calibrated core body temperature through the personalized body temperature model and the personalized parameters of S4.
Further, the preset personalized body temperature model parameters in step S1 may be calculated from the cloud database based on the body characteristic parameters input by the user, where the body characteristic parameters include sex, age, height, weight, BMI, and body fat percentage.
Further, step S1 includes calculating the similarity between the body characteristic parameter of the user and the body characteristic parameters of the existing users in the database by using a weighted euclidean distance or other similarity calculation method after normalizing the body characteristic parameter of the user, and selecting the model of the existing user in the database with the greatest similarity to the user as the preset parameter of the personalized body temperature model of the user.
Further, the external core body temperature device in step S3 includes an ear thermometer, a mercury thermometer, and an electronic thermometer.
Further, the step S3 of calculating the personalization parameters of the user includes: and the user inputs the reference core body temperature data as a body temperature true value, and obtains the personalized parameters of the body temperature model of the user through a fitting algorithm or a machine learning algorithm.
Further, step S5 includes uploading the physical characteristic parameters of the user and the parameters of the personalized body temperature model to a remote cloud database.
Furthermore, the invention provides wearable core body temperature measuring equipment which comprises a temperature sensor module, a central controller module, a wireless transmission module, a man-machine interaction display and input module, a shell and a watchband module.
Furthermore, the temperature sensor module comprises a first temperature sensor and a second temperature sensor, the first temperature sensor is positioned on the inner side of the watchband and is in contact with the skin, the second temperature sensor is embedded in the middle of the watchband and is spaced from the first temperature sensor by a certain distance, and the first temperature sensor and the second temperature sensor are connected with the central controller module through flexible leads embedded in the watchband;
the central controller module is configured to acquire a temperature signal of the temperature sensor module, calculate the core body temperature of the user in real time, control the man-machine interaction display and input module, and control remote uploading and downloading of data through the wireless transmission module;
the wireless transmission module is configured to transmit data between the wearable device and the cloud database;
the human-computer interaction display and input module is a touch liquid crystal display screen connected with the central controller module;
the shell and watchband module comprises a shell and a watchband, the central controller module, the wireless transmission module and the human-computer interaction display and input module are arranged on the shell, and the temperature sensor is embedded in the watchband.
Furthermore, a pulse sensor, a heart rate sensor or other physiological parameter sensors are embedded in the contact part of the bottom of the watchcase and the skin.
Further, the power supply of the equipment is a built-in power supply or a wireless power supply.
Compared with the prior art, the invention at least has the following beneficial technical effects:
(1) the provided personalized body temperature calculation model fully considers the influence of individual difference and dynamic blood flow change, has higher accuracy and can meet the application requirements of different people;
(2) when the calibrated core body temperature data is not input, the accuracy of the model is ensured by adopting a method of obtaining the basic model parameters most suitable for the user based on individual feature similarity matching, namely, the accuracy and the real-time performance of temperature measurement can be ensured no matter whether the user provides the calibrated core body temperature data, and the wide popularization and application are facilitated;
(3) the method is integrated into wearable equipment such as a wristwatch to continuously monitor the body temperature, so that the method is easy to accept and convenient for a user to operate, and has good application prospect;
(4) the establishment of the cloud database is beneficial to recording mode information and historical information of the user, and can be applied to future health monitoring, analysis and early warning.
The conception, specific structure and technical effects of the present invention will be further described in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention.
Drawings
FIG. 1 is a flow chart of a wearable core body temperature measurement method of the present invention;
FIG. 2 is a schematic structural diagram of a preferred embodiment of the wearable core body temperature measurement device of the present invention;
the device comprises a watch shell 1, a watch band 2, a first temperature sensor 3, a second temperature sensor 4 and a cloud database 5.
Detailed Description
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings for clarity and understanding of technical contents. The present invention may be embodied in many different forms of embodiments and the scope of the invention is not limited to the embodiments set forth herein.
In the drawings, structurally identical elements are represented by like reference numerals, and structurally or functionally similar elements are represented by like reference numerals throughout the several views. The size and thickness of each component shown in the drawings are arbitrarily illustrated, and the present invention is not limited to the size and thickness of each component. The thickness of the components may be exaggerated where appropriate in the figures to improve clarity.
The meaning of the partial nouns referred to in the present invention is as follows:
the core body temperature is the temperature of the deep core of the human body, which is the temperature at the main output channel of the heart or the central nervous system (with the center of thermoregulation), and is generally represented by the rectal temperature in clinic, and is generally represented by the temperature at the oral cavity, the axilla, the tympanic membrane and the like in daily life.
Fig. 1 is a flow chart of a wearable core body temperature measurement method, including the following steps:
s1, presetting personalized body temperature model parameters;
s2, the wearable device collects the skin temperature and the device temperature of the specific position of the user, and the uncalibrated core body temperature is calculated by utilizing the personalized body temperature model and the model parameters of S1;
s3, inputting a reference core body temperature measured by an external core body temperature device by a user, and calculating to obtain personalized parameters of the user;
s4, repeating the step S3, and updating the personalized parameters of the personalized body temperature model of the user;
and S5, acquiring the skin temperature and the equipment temperature of the specific position of the user by the wearable equipment, and calculating to obtain the calibrated core body temperature through the personalized body temperature model and the personalized parameters of S4.
In the above steps, the body temperature model is a mathematical relation of the core body temperature Tc, the skin temperature Ts and the equipment temperature Tb which are derived based on the human body heat transfer mechanism. There are 4 undetermined parameters (a, b, c, d) in the relation that are related to the individual's physiological condition, of which 2 parameters (a, b) are related to dynamic blood flow regulation changes. The relation formula of the core body temperature Tc, the skin temperature Ts and the equipment temperature Tb is simplified as follows:
Tc＝g(Ts,Tb,{a、b、c、d})
wherein a, b, c, d are four undetermined parameters related to blood flow change characteristics, tissue characteristics, device characteristics, and temperature differences. The four undetermined parameters are the model parameters.
In step S1, the preset values of the user body temperature model parameters may be obtained based on an individual feature similarity algorithm, and the body feature parameters include sex, age, height, weight, BMI, body fat percentage, and the like. And calculating the similarity between the body characteristic parameters of the target user and the body characteristic parameters of the existing users in the database by using an individual characteristic similarity algorithm, wherein the similarity is obtained by calculating through a weighted Euclidean distance or other similarity calculation methods after the characteristic parameters are normalized, and the model parameters of the existing users in the database with the maximum similarity to the target user are selected as the preset parameters of the personalized body temperature model of the target user.
In step S1, the cloud database includes body characteristic parameters of the group users and parameters of the corresponding personalized body temperature models, and the personalized body temperature model parameters are obtained only from the measured data and the input data of the individual user, and there is no data intersection with other users, so that the difference of model parameters among the individuals of the users is fully considered, and the highest accuracy can be achieved.
In step S3, the core body temperature data input by the user as the body temperature true value of the user-customized body temperature model parameter is obtained through a fitting algorithm or a machine learning algorithm, and the parameter is updated and calibrated with the continuous input of the user true value. The core body temperature data to which the user inputs the reference can be obtained from a commonly used body temperature measuring mode such as an ear thermometer, a mercury thermometer and an electronic thermometer.
In step S3, the user may input the reference core body temperature measured by the external core body temperature device through the input module of the wearable device or the mobile phone app wirelessly connected with the wearable device.
Taking a certain user as an example, the specific implementation process of the invention is as follows:
the user inputs body characteristic parameters of the user through a liquid crystal display screen of the operation wristwatch, wherein the body characteristic parameters comprise information such as sex, age, height, weight, BMI (body fat percentage) and the like, and the program automatically completes the matching based on an individual characteristic similarity algorithm to obtain the body temperature model preset parameters which are most suitable for the user. Specifically, the similarity between the body characteristic parameters of the target user and the body characteristic parameters of the existing users in the database is calculated, the similarity is obtained through calculation by a weighted Euclidean distance or other similarity calculation methods after the characteristic parameters are normalized, and the model parameters of the existing users in the database with the maximum similarity to the target user are selected as the preset parameters of the personalized body temperature model of the target user.
The user wears the wearable wristwatch device in a specific position and starts a data monitoring function, and the wristwatch starts to automatically and continuously monitor the skin temperature and the device temperature at the position. And calculating to obtain the core body temperature by utilizing the personalized body temperature model and preset parameters according to the skin temperature and the equipment temperature of the position acquired by the equipment, and displaying the core body temperature on a liquid crystal display screen of the wristwatch. When the user does not input calibrated core body temperature data, the core body temperature displayed by the wristwatch is subject to the step.
When a user wants to obtain more accurate personalized body temperature model parameters, namely a more accurate body temperature model is established based on individual actual data, the user can input reference core body temperature data through a liquid crystal display screen of the wristwatch, and the wristwatch automatically forms and updates an individual temperature database. The core body temperature data to which the user inputs the reference can be obtained from a commonly used body temperature measuring mode such as an ear thermometer, a mercury thermometer and an electronic thermometer. The core body temperature data input by the user as the body temperature true value of the user personalized body temperature model parameter is obtained through a fitting algorithm or a machine learning algorithm, and the parameter is updated and calibrated along with the continuous input of the user true value.
After the personalized body temperature model parameters of the user are obtained, the core body temperature can be obtained through calculation of the wrist watch by utilizing the personalized body temperature model and the personalized parameters according to the skin temperature and the equipment temperature of the specific position collected by the equipment, and the core body temperature is displayed in a liquid crystal display screen of the wrist watch. After the user inputs the calibrated core body temperature data, the core body temperature displayed by the wristwatch is subject to the result of the personalized body temperature model and the personalized parameters.
The invention also provides wearable core body temperature measuring equipment which comprises a temperature sensor module, a central controller module, a wireless transmission module, a man-machine interaction display and input module, a shell and a watchband module.
The temperature sensor module is used for measuring skin temperature and equipment temperature, and comprises two temperature sensors, wherein a first temperature sensor 3 is positioned on the inner side of the watchband 2 and is in contact with the skin, a second temperature sensor 4 is embedded in the middle of the watchband 2 and is vertically away from the first temperature sensor 3 by a certain distance, the two sensors are connected with the controller through flexible wires embedded in the watchband, and the sensors can be thermocouples, thermistors, platinum resistors and the like. The central controller module is used for calculating the core body temperature and connecting all module functions, and can be a single chip microcomputer and the like. The wireless transmission module is used for realizing data transmission between the wristwatch data and the cloud database 5 and can be realized through technologies such as WiFi, Bluetooth and Zigbee. The human-computer interaction display and input module is used for realizing interaction between a user and the wristwatch, and comprises core body temperature information display, user body characteristic information input, reference body temperature data input and the like, a touch liquid crystal display screen and the like can be arranged on the watch shell side, a switch starting button for simply starting a default mode by one key can be arranged on the watch shell side, and the operation of the old or children is facilitated. The shell and the watchband module are used for fixing and supporting all modules, wherein the shape of watchcase 1 and watchband 2 accords with ergonomic design, and liquid crystal display is embedded into the top of watchcase 1, embeds temperature sensor in the watchband, and watchband length is adjustable in order to guarantee that first temperature sensor and wrist skin in close contact with. More physiological parameter sensors, such as pulse, heart rate and the like, can be embedded into the contact part of the bottom of the watch case and the skin, and the design can be integrated into the existing wristwatch product as functional supplement. Alternatively, the device power supply may be a built-in power supply or a wireless power supply.
Wearable devices include, but are not limited to, a wristwatch form, a neck collar form, a forehead or chest patch form.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN120008753A (en) * | 2025-04-14 | 2025-05-16 | 南京晶捷生物科技有限公司 | A body temperature detection method, device, system, equipment and readable storage medium |
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