CN115183899A - Body temperature detection method, device, medium and body temperature detector - Google Patents

Body temperature detection method, device, medium and body temperature detector Download PDF

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Publication number
CN115183899A
CN115183899A CN202211020045.6A CN202211020045A CN115183899A CN 115183899 A CN115183899 A CN 115183899A CN 202211020045 A CN202211020045 A CN 202211020045A CN 115183899 A CN115183899 A CN 115183899A
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temperature
circuit channel
circuit
body temperature
resistance value
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吴迪
张楠楠
杨铭鑫
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Weihai Wego Medical Imaging Technology Co ltd
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Weihai Wego Medical Imaging Technology Co ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
    • G01K7/22—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor
    • G01K7/24—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor in a specially-adapted circuit, e.g. bridge circuit
    • G01K7/25—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor in a specially-adapted circuit, e.g. bridge circuit for modifying the output characteristic, e.g. linearising
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K15/00—Testing or calibrating of thermometers
    • G01K15/005—Calibration

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  • General Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)

Abstract

The application discloses body temperature detection method is applied to body temperature detector, and this detector includes: the temperature sensor is made of a thermistor, and a plurality of circuit channels capable of representing ideal resistance values of the thermistor at different specified temperatures; the method comprises the following steps: detecting the body temperature of the object to be detected by using a temperature sensor to obtain a target detection temperature, and determining a first circuit channel and a second circuit channel corresponding to a first specified temperature and a second specified temperature; respectively sending test signals to the two circuit channels to determine actual resistance values of the first circuit channel and the second circuit channel; and correcting the target detection temperature according to the actual resistance values and the ideal resistance values of the first circuit channel and the second circuit channel to obtain the actual body temperature of the object to be detected. The method can accurately and reliably detect the body temperature of the human body. Correspondingly, the body temperature detection device, the medium and the body temperature detector have the beneficial effects.

Description

Body temperature detection method, device, medium and body temperature detector
Technical Field
The invention relates to the technical field of medical instruments, in particular to a body temperature detection method, a body temperature detection device, a body temperature detection medium and a body temperature detector.
Background
In contact type body temperature monitoring devices, a thermistor is generally used as a temperature sensor to detect the body temperature of a human body. Because the resistance value of the thermistor can change along with the change of the temperature, the body temperature of the human body can be determined by measuring the resistance value of the thermistor.
In the prior art, a thermistor manufacturer can provide a relation table between the resistance value and the temperature of a thermistor in advance, when the resistance value corresponding to the body temperature of a human body is measured, the body temperature of the human body can be determined by comparing the table provided by the thermistor manufacturer, but the resistance value of the thermistor can be influenced by factors such as detection environment and instrument manufacturing. Therefore, the body temperature of the human body cannot be accurately and reliably detected by this method.
Therefore, how to accurately and reliably detect the body temperature of the human body is a technical problem to be solved urgently by those skilled in the art.
Disclosure of Invention
In view of the above, the present invention provides a body temperature detecting method, device, medium and body temperature detector to accurately and reliably detect the body temperature of a human body. The specific scheme is as follows:
a body temperature detection method is applied to a body temperature detector, and the body temperature detector comprises: the temperature sensor is made of a thermistor and a plurality of circuit channels capable of representing that the thermistor has ideal resistance values at different specified temperatures; the method comprises the following steps:
detecting the body temperature of the object to be detected by using the temperature sensor to obtain a target detection temperature, and determining a first circuit channel corresponding to a first specified temperature and a second circuit channel corresponding to a second specified temperature; the first specified temperature is the maximum temperature which is lower than the target detection temperature in the specified temperatures corresponding to the circuit channels; the second specified temperature is the minimum temperature which is higher than the target detection temperature in the specified temperatures corresponding to the plurality of circuit channels;
sending test signals to the first circuit channel and the second circuit channel respectively to determine actual resistance values of the first circuit channel and the second circuit channel;
and correcting the target detection temperature according to the actual resistance value and the ideal resistance value of the first circuit channel and the second circuit channel so as to obtain the actual body temperature of the object to be detected.
Preferably, the process of sending test signals to the first circuit path and the second circuit path respectively to determine the actual resistance values of the first circuit path and the second circuit path includes:
sending the test signal to the first circuit channel, and acquiring a first output signal of the first circuit channel;
and performing power amplification processing on the first output signal, and performing digital-to-analog conversion on the first output signal to obtain an actual resistance value of the first circuit channel.
Preferably, the thermistor is specifically an NTC thermistor.
Preferably, the plurality of circuit channels are all built by precision resistors.
Preferably, the step of correcting the target detection temperature according to the actual resistance value and the ideal resistance value of the first circuit channel and the second circuit channel to obtain the actual body temperature of the object to be measured includes:
correcting the first specified temperature according to the actual resistance value and the ideal resistance value of the first circuit channel to obtain a first correction parameter, and correcting the second specified temperature according to the actual resistance value and the ideal resistance value of the second circuit channel to obtain a second correction parameter;
and correcting the target detection temperature by using the first correction parameter and the second correction parameter to obtain the actual body temperature of the object to be detected.
Preferably, the step of correcting the first specified temperature according to the actual resistance value and the ideal resistance value of the first circuit path to obtain a first correction parameter, and correcting the second specified temperature according to the actual resistance value and the ideal resistance value of the second circuit path to obtain a second correction parameter includes:
determining the temperature corresponding to the actual resistance value of the first circuit channel according to a preset mapping relation to obtain a first theoretical temperature; the preset mapping relation is a mapping relation between the thermistor and the resistance value at different temperatures;
determining the first correction parameter according to the first theoretical temperature and the actual resistance value and the ideal resistance value of the first circuit channel based on a first model;
determining the temperature corresponding to the actual resistance value of the second circuit channel according to the preset mapping relation to obtain a second theoretical temperature;
determining the second correction parameter according to the second theoretical temperature and the actual resistance value and the ideal resistance value of the second circuit channel based on a second model;
wherein the expression of the first model is:
A 1 ＝E 1 ·(T 2 -t 0 )(T 2 -T 1 )；
the expression of the second model is:
A 2 ＝E 2 ·(t 0 -T 1 )(T 2 -T 1 )；
in the formula, A 1 As the first correction parameter, A 2 For the second correction parameter, E 1 Is the difference between the first specified temperature and the first theoretical temperature, E 2 Is the difference between said second specified temperature and said second theoretical temperature, T 1 Is the first specified temperature, T 2 For the second specified temperature, t 0 Detecting a temperature for the target.
Preferably, the step of correcting the target detection temperature by using the first correction parameter and the second correction parameter to obtain the actual body temperature of the object to be measured includes:
correcting the target detection temperature by using the first correction parameter and the second correction parameter based on a third model to obtain the actual body temperature of the object to be detected;
wherein the expression of the third model is:
t＝t 0 -A 1 -A 2 ；
wherein t is the actual body temperature t 0 Detecting the temperature for said target, A 1 As the first correction parameter, A 2 Is the second correction parameter.
Correspondingly, the invention also discloses a body temperature detection device, which is applied to a body temperature detector, and the body temperature detector comprises: the temperature sensor is made of a thermistor and a plurality of circuit channels capable of representing that the thermistor has ideal resistance values at different specified temperatures; the device comprises:
the body temperature measuring module is used for detecting the body temperature of the object to be detected by using the temperature sensor to obtain a target detection temperature, and determining a first circuit channel corresponding to a first specified temperature and a second circuit channel corresponding to a second specified temperature; the first specified temperature is the maximum temperature which is lower than the target detection temperature in the specified temperatures corresponding to the circuit channels; the second specified temperature is the minimum temperature which is higher than the target detection temperature in the specified temperatures corresponding to the plurality of circuit channels;
the signal testing module is used for respectively sending testing signals to the first circuit channel and the second circuit channel so as to determine the actual resistance values of the first circuit channel and the second circuit channel;
and the body temperature correction module is used for correcting the target detection temperature according to the actual resistance values and the ideal resistance values of the first circuit channel and the second circuit channel so as to obtain the actual body temperature of the object to be detected.
Correspondingly, the invention also discloses a body temperature detector, which comprises: the temperature sensor is made of a thermistor and a plurality of circuit channels capable of representing that the thermistor has ideal resistance values at different specified temperatures, the temperature sensor and the circuit channels are connected with a controller, and a display screen for displaying body temperature data is arranged on the controller; wherein the controller is configured to perform the steps of:
detecting the body temperature of the object to be detected by using the temperature sensor to obtain a target detection temperature, and determining a first circuit channel corresponding to a first specified temperature and a second circuit channel corresponding to a second specified temperature; the first specified temperature is the maximum temperature which is lower than the target detection temperature in the specified temperatures corresponding to the circuit channels; the second specified temperature is the minimum temperature which is higher than the target detection temperature in the specified temperatures corresponding to the plurality of circuit channels;
sending test signals to the first circuit channel and the second circuit channel respectively to determine actual resistance values of the first circuit channel and the second circuit channel;
and correcting the target detection temperature according to the actual resistance value and the ideal resistance value of the first circuit channel and the second circuit channel so as to obtain the actual body temperature of the object to be detected.
Accordingly, the present invention also discloses a computer readable storage medium, on which a computer program is stored, which when executed by a processor, implements the steps of a body temperature detection method as disclosed in the foregoing.
In the invention, a temperature sensor made of a thermistor and a plurality of circuit channels capable of representing that the thermistor has ideal resistance values at different specified temperatures are arranged in the body temperature detector in advance, so that a plurality of circuit channels with the thermistor corresponding to the ideal resistance values at different temperatures are created. When the body temperature of the object to be measured is to be measured, the body temperature of the object to be measured is firstly detected by using the temperature sensor to obtain a target detection temperature, and then the maximum temperature smaller than the target detection temperature and the minimum temperature larger than the target detection temperature are searched in the designated temperatures corresponding to the plurality of circuit channels to obtain a first designated temperature and a second designated temperature. Therefore, the minimum temperature range interval in which the target detection temperature is located is searched from different temperature values corresponding to the thermistor. Then, determining a first circuit channel and a second circuit channel corresponding to the first specified temperature and the second specified temperature, and respectively sending test signals to the first circuit channel and the second circuit channel to determine the actual resistance values of the first circuit channel and the second circuit channel, so that the ideal resistance value and the actual resistance value corresponding to the thermistor at different temperatures can be determined in the actual detection environment, and then the corresponding environmental error when the body temperature of the object to be detected is detected and the system error caused by instrument manufacturing can be determined according to the values; and finally, correcting the target detection temperature according to the actual resistance value and the ideal resistance value of the first circuit channel and the second circuit channel, so that the body temperature of the object to be detected can be detected more accurately and reliably. Correspondingly, the body temperature detection device, the medium and the body temperature detector provided by the invention also have the beneficial effects.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a flowchart of a body temperature detecting method according to an embodiment of the present invention;
fig. 2 is a structural diagram of a body temperature detecting device according to an embodiment of the present invention;
FIG. 3 is a block diagram of a body temperature detector according to an embodiment of the present invention;
FIG. 4 is a block diagram of another body temperature monitor according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a flowchart of a body temperature detecting method according to an embodiment of the present invention, the method is applied to a body temperature detecting apparatus, and the body temperature detecting apparatus includes: the temperature sensor is made of a thermistor and a plurality of circuit channels capable of representing ideal resistance values of the thermistor at different specified temperatures; the method comprises the following steps:
step S11: detecting the body temperature of the object to be detected by using a temperature sensor to obtain a target detection temperature, and determining a first circuit channel corresponding to a first specified temperature and a second circuit channel corresponding to a second specified temperature; the first specified temperature is the maximum temperature which is lower than the target detection temperature in the specified temperatures corresponding to the circuit channels; the second specified temperature is the minimum temperature which is greater than the target detection temperature in the specified temperatures corresponding to the circuit channels;
step S12: respectively sending test signals to the first circuit channel and the second circuit channel to determine the actual resistance values of the first circuit channel and the second circuit channel;
step S13: and correcting the target detection temperature according to the actual resistance values and the ideal resistance values of the first circuit channel and the second circuit channel to obtain the actual body temperature of the object to be detected.
In this embodiment, a body temperature detection method is provided, by which the body temperature of a subject to be detected can be detected more accurately and reliably. In the body temperature detection method, a temperature sensor made of a thermistor and a plurality of circuit channels capable of representing that the thermistor has ideal resistance values at different specified temperatures need to be arranged in the body temperature detector in advance.
Specifically, the thermistor may be provided as an NTC (Negative Temperature Coefficient) thermistor. It can be understood that, because the NTC thermistor is not only inexpensive, but also more sensitive to temperature changes and has a very fast response speed, when the thermistor in the temperature sensor is set as the NTC thermistor, the body temperature of the subject can be detected more quickly and accurately.
In addition, in practical applications, precision resistors (Precision resistors) may be used to build up multiple circuit channels that can characterize the thermistor as having ideal Resistance values at different specified temperatures. Because the precision resistor is a resistor with high precision, low temperature drift and high reliability, wherein the highest precision of the precision resistor can reach 0.01%, when a circuit channel of the thermistor corresponding to ideal resistance values at different specified temperatures is built by using the precision resistor, the actual resistance value of the circuit channel can be closer to the ideal resistance value corresponding to the thermistor at the specified temperature.
It is conceivable that when a plurality of circuit paths are provided in the body temperature monitor, which can represent that the thermistor has an ideal resistance value at different given temperatures, it is equivalent to creating a plurality of circuit paths in the body temperature monitor, in which the thermistor has a corresponding ideal resistance value at different temperature values. That is, each circuit channel can represent the ideal resistance value corresponding to the thermistor under a certain temperature value.
Specifically, in practical application, the specified temperatures corresponding to the multiple circuit channels may be specifically set according to the normal body temperature range of the object to be measured. Such as: the normal body temperature of the human body is approximately 36.0 to 37.0 ℃, and when the designated temperatures corresponding to the plurality of circuit channels are set, the designated temperatures corresponding to the plurality of circuit channels can be set to 30 ℃, 32 ℃, 37 ℃, 40 ℃ and the like.
When the body temperature of the object to be measured needs to be measured, the body temperature of the object to be measured is detected by using the temperature sensor to obtain a target detection temperature, then the maximum temperature smaller than the target detection temperature is searched from the designated temperatures corresponding to the plurality of circuit channels to obtain a first designated temperature, and the minimum temperature larger than the target detection temperature is searched from the designated temperatures corresponding to the plurality of circuit channels to obtain a second designated temperature. This corresponds to finding the minimum temperature range corresponding to the target detection temperature from among the specified temperatures corresponding to the plurality of circuit paths. In other words, the minimum temperature interval in which the target detection temperature is located is found from the different temperature values corresponding to the thermistors.
And then, respectively sending test signals to the first circuit channel and the second circuit channel to calculate the actual resistance values of the first circuit channel and the second circuit channel. It can be understood that, since the actual resistance values of the first circuit channel and the second circuit channel are calculated in the actual detection environment in which the body temperature of the object to be detected is detected, the actual resistance values corresponding to the first circuit channel and the second circuit channel in the actual detection environment can be obtained by the method.
When the actual resistance values corresponding to the first circuit channel and the second circuit channel are obtained through calculation, the actual resistance values are compared with the ideal resistance values corresponding to the first circuit channel and the second circuit channel, so that the corresponding environmental error when the body temperature of the object to be detected is detected and the system error caused by instrument manufacturing can be determined, and therefore, the body temperature of the object to be detected can be detected more accurately and reliably after the target detection temperature of the object to be detected is corrected by using the actual resistance values and the ideal resistance values corresponding to the first circuit channel and the second circuit channel.
In the present embodiment, a temperature sensor made of a thermistor and a plurality of circuit channels capable of indicating that the thermistor has ideal resistance values at different specified temperatures are arranged in the body temperature detector in advance, which is equivalent to that a plurality of circuit channels corresponding to the ideal resistance values of the thermistor at different temperatures are created. When the body temperature of the object to be measured is to be measured, the body temperature of the object to be measured is firstly detected by using the temperature sensor to obtain a target detection temperature, and then the maximum temperature smaller than the target detection temperature and the minimum temperature larger than the target detection temperature are searched in the designated temperatures corresponding to the plurality of circuit channels to obtain a first designated temperature and a second designated temperature. Therefore, the minimum temperature range section where the target detection temperature is located is searched from different temperature values corresponding to the thermistor. Then, determining a first circuit channel and a second circuit channel corresponding to the first specified temperature and the second specified temperature, and respectively sending test signals to the first circuit channel and the second circuit channel to determine the actual resistance values of the first circuit channel and the second circuit channel, so that the ideal resistance value and the actual resistance value corresponding to the thermistor at different temperatures can be determined in the actual detection environment, and then the corresponding environmental error when the body temperature of the object to be detected is detected and the system error caused by instrument manufacturing can be determined according to the values; and finally, correcting the target detection temperature according to the actual resistance value and the ideal resistance value of the first circuit channel and the second circuit channel, so that the body temperature of the object to be detected can be detected more accurately and reliably.
Based on the above embodiments, this embodiment further describes and optimizes the technical solution, and as a preferred implementation, the above steps: a process for sending test signals to a first circuit path and a second circuit path, respectively, to determine actual resistance values of the first circuit path and the second circuit path, comprising:
sending a test signal to a first circuit channel, and acquiring a first output signal of the first circuit channel;
and performing power amplification processing on the first output signal, and performing digital-to-analog conversion on the first output signal to obtain an actual resistance value of the first circuit channel.
When the actual resistance value of the first circuit channel is determined, a test signal can be sent to the first circuit channel first, and an output signal of the first circuit channel is obtained to obtain a first output signal; then, performing power amplification processing on the first output signal, and performing analog-to-digital conversion on the first output signal to obtain an output voltage of the first circuit channel; the actual resistance value of the first circuit path can then be determined using the output voltage of the first circuit path and the current signal sent to the first circuit path.
Similarly, when the actual resistance value of the second circuit channel is to be determined, the test signal may also be sent to the second circuit channel first, and the output signal of the second circuit channel is obtained to obtain a second output signal; then, performing power amplification processing on the second output signal, and performing analog-to-digital conversion on the second output signal to obtain the output voltage of the second circuit channel; finally, the actual resistance value of the second circuit path can be determined by using the output voltage of the second circuit path and the current signal sent to the second circuit path.
Therefore, by the technical scheme provided by the embodiment, the actual resistance values corresponding to the first circuit channel and the second circuit channel can be accurately calculated.
Based on the above embodiment, this embodiment further describes and optimizes the technical solution, and as a preferred implementation, the above steps: the process of correcting the target detection temperature according to the actual resistance value and the ideal resistance value of the first circuit channel and the second circuit channel to obtain the actual body temperature of the object to be detected comprises the following steps:
correcting the first specified temperature according to the actual resistance value and the ideal resistance value of the first circuit channel to obtain a first correction parameter, and correcting the second specified temperature according to the actual resistance value and the ideal resistance value of the second circuit channel to obtain a second correction parameter;
and correcting the target detection temperature by using the first correction parameter and the second correction parameter to obtain the actual body temperature of the object to be detected.
When the target detection temperature of the object to be detected is corrected according to the actual resistance value and the ideal resistance value of the first circuit channel and the second circuit channel, firstly, the first specified temperature is corrected according to the actual resistance value and the ideal resistance value of the first circuit channel, and a first correction parameter is obtained.
It will be appreciated that, since the actual build of the first circuit path will necessarily deviate from the ideal, when the actual resistance value and the ideal resistance value of the first circuit path are determined, the deviation that occurs in specifying the temperature characterized by the first circuit path can be determined. In other words, since the first circuit path is a path that characterizes the thermistor as having an ideal resistance value at the first designated temperature, and the actual resistance value of the first circuit path does not coincide with the ideal resistance value thereof, a deviation must also occur when designating the temperature characterized by the first circuit path.
In order to avoid introducing instrument errors and environmental errors into the body temperature detection result of the object to be detected, the first specified temperature needs to be corrected according to the actual resistance value and the ideal resistance value of the first circuit channel. Similarly, the second specified temperature corresponding to the second circuit channel may also be corrected according to the actual resistance value and the ideal resistance value of the second circuit channel. It can be thought that, after the first correction parameter and the second correction parameter are determined, the target detection temperature of the object to be detected can be corrected by using the first correction parameter and the second correction parameter, so that the more accurate and reliable body temperature of the object to be detected can be obtained.
As a preferred embodiment, the above steps: the process of correcting the first specified temperature according to the actual resistance value and the ideal resistance value of the first circuit channel to obtain a first correction parameter, and correcting the second specified temperature according to the actual resistance value and the ideal resistance value of the second circuit channel to obtain a second correction parameter comprises the following steps:
determining the temperature corresponding to the actual resistance value of the first circuit channel according to a preset mapping relation to obtain a first theoretical temperature; the preset mapping relation is the mapping relation between the thermistor and the resistance value at different temperatures;
determining a first correction parameter according to a first theoretical temperature, an actual resistance value and an ideal resistance value of the first circuit channel based on the first model;
determining the temperature corresponding to the actual resistance value of the second circuit channel according to a preset mapping relation to obtain a second theoretical temperature;
determining a second correction parameter according to a second theoretical temperature, an actual resistance value and an ideal resistance value of a second circuit channel based on the second model;
wherein the expression of the first model is:
A 1 ＝E 1 ·(T 2 -t 0 )(T 2 -T 1 )；
the expression of the second model is:
A 2 ＝E 2 ·(t 0 -T 1 )(T 2 -T 1 )；
in the formula, A 1 As a first correction parameter, A 2 For a second correction parameter, E 1 As the difference between the first specified temperature and the first theoretical temperature, E 2 For the difference between the second specified temperature and the second theoretical temperature, T 1 Is a first specified temperature, T 2 Is the second specified temperature, t 0 The temperature is detected for the target.
When determining the correction parameters corresponding to the first circuit channel and the second circuit channel, the temperature corresponding to the actual resistance value of the first circuit channel may be determined according to the preset mapping relationship to obtain the first theoretical temperature. The preset mapping relationship is a mapping relationship between the thermistor and the resistance value at different temperatures, that is, the preset mapping relationship can represent the change of the resistance value of the thermistor at different temperatures.
When the first theoretical temperature corresponding to the first circuit channel is determined, the first theoretical temperature and the first specified temperature corresponding to the first circuit channel, the target detection temperature of the object to be detected and the second specified temperature corresponding to the second circuit channel are substituted into the first model, and then the first correction parameter can be determined. Similarly, a second theoretical temperature corresponding to the actual resistance value of the second circuit channel can be determined according to the preset mapping relationship, and then the second theoretical temperature and the second specified temperature corresponding to the second circuit channel, the target detection temperature of the object to be detected and the first specified temperature corresponding to the first circuit channel are substituted into the second model, so that a second correction parameter can be determined.
As a preferred embodiment, the above steps: the process of correcting the target detection temperature by using the first correction parameter and the second correction parameter to obtain the actual body temperature of the object to be measured includes:
correcting the target detection temperature by using the first correction parameter and the second correction parameter based on the third model to obtain the actual body temperature of the object to be detected;
wherein the expression of the third model is:
t＝t 0 -A 1 -A 2 ；
wherein t is the actual body temperature, t 0 To detect the temperature for the target, A 1 As a first correction parameter, A 2 Is a second correction parameter.
After the first correction parameter and the second correction parameter are obtained, the first correction parameter, the second correction parameter and the target detection temperature are simultaneously input into the third model for calculation, and a more accurate and reliable body temperature value of the object to be detected can be determined. It can be thought that, after the target detection temperature of the object to be detected is corrected by using the first correction parameter and the second correction parameter, errors caused by instrument errors and environmental errors can be removed from the target detection temperature of the object to be detected, so that a more accurate body temperature value of the object to be detected can be obtained.
Obviously, the actual body temperature of the object to be measured can be determined more accurately and reliably by the technical scheme provided by the embodiment.
Referring to fig. 2, fig. 2 is a structural diagram of a body temperature detecting device according to an embodiment of the present invention, the body temperature detecting device is applied to a body temperature detecting apparatus, and the body temperature detecting apparatus includes: the temperature sensor is made of a thermistor and a plurality of circuit channels capable of representing ideal resistance values of the thermistor at different specified temperatures; the device includes:
the body temperature measurement module 21 is configured to detect a body temperature of the object to be detected by using the temperature sensor, obtain a target detection temperature, and determine a first circuit channel corresponding to the first specified temperature and a second circuit channel corresponding to the second specified temperature; the first specified temperature is the maximum temperature which is lower than the target detection temperature in the specified temperatures corresponding to the circuit channels; the second specified temperature is the minimum temperature which is greater than the target detection temperature in the specified temperatures corresponding to the circuit channels;
a signal testing module 22, configured to send test signals to the first circuit channel and the second circuit channel, respectively, so as to determine actual resistance values of the first circuit channel and the second circuit channel;
and the body temperature correction module 23 is configured to correct the target detection temperature according to the actual resistance values and the ideal resistance values of the first circuit channel and the second circuit channel, so as to obtain the actual body temperature of the object to be detected.
The body temperature detection device provided by the embodiment of the invention has the beneficial effects of the body temperature detection method disclosed by the embodiment of the invention.
Referring to fig. 3, fig. 3 is a structural diagram of a body temperature detector according to an embodiment of the present invention, the body temperature detector includes: the temperature sensor 11 made of the thermistor and a plurality of circuit channels 12 which can represent that the thermistor has ideal resistance values at different specified temperatures, the temperature sensor 11 and the plurality of circuit channels 12 are connected with a controller 13, and a display screen 14 for displaying body temperature data is arranged on the controller 13; wherein the controller 13 is configured to perform the following steps:
detecting the body temperature of the object to be detected by using a temperature sensor to obtain a target detection temperature, and determining a first circuit channel corresponding to a first specified temperature and a second circuit channel corresponding to a second specified temperature; the first specified temperature is the maximum temperature which is lower than the target detection temperature in the specified temperatures corresponding to the circuit channels; the second specified temperature is the minimum temperature which is higher than the target detection temperature in the specified temperatures corresponding to the plurality of circuit channels;
respectively sending test signals to the first circuit channel and the second circuit channel to determine the actual resistance values of the first circuit channel and the second circuit channel;
and correcting the target detection temperature according to the actual resistance values and the ideal resistance values of the first circuit channel and the second circuit channel to obtain the actual body temperature of the object to be detected.
In the present embodiment, a body temperature detector adapted to the above body temperature detection method is provided, in which a temperature sensor 11 made of a thermistor, a plurality of circuit channels 12 capable of representing that the thermistor has ideal resistance values at different specified temperatures, a controller 13 and a display 14 are provided. Also, the temperature sensor 11, the plurality of circuit paths 12, and the display 14 are all connected to the controller 13. The action steps executed by the controller 13 can refer to the description of the relevant parts of the above embodiments, and are not described herein again.
Specifically, in order to enable the controller 13 to acquire data information fed back by the temperature sensor and each circuit channel, a signal acquisition circuit including a multiplexing switch and a signal processing circuit for processing feedback data may be further disposed in the controller 13. Thus, when acquiring data fed back by the temperature sensor 11 or the plurality of circuit channels 12, the controller 13 can acquire the detected temperature collected by the temperature sensor 11 and the data information fed back by the circuit channels 12 directly through the multiplexing switch. When the controller 13 determines the actual body temperature of the object to be detected by the body temperature detection method, the body temperature data of the object to be detected can be directly displayed through the display screen 14, so that the user experience of the user when using the body temperature detector can be further improved.
In addition, in practical application, a memory may be added to the controller 13 to store the body temperature data of the object to be measured, so that the user can conveniently and quickly monitor and observe the body temperature data of the user in the subsequent use process.
The body temperature detector provided by the embodiment of the invention has the beneficial effects of the body temperature detection method disclosed by the invention.
In order to make the core content of the body temperature detection method provided by the present application more clearly understood by those skilled in the art, the above content is described in detail by a scenario embodiment. Referring to fig. 4, fig. 4 is a structural diagram of another body temperature detector according to an embodiment of the present invention. The body temperature monitor shown in fig. 4 includes: the temperature sensor 11, the first circuit path 121, the second circuit path 122, the third circuit path 123, the fourth circuit path 124, the signal acquisition circuit 131, the signal processing circuit 132, the controller 13, the display 14 and the memory 15 are made of thermistors. In the body temperature detector shown in fig. 4, the signal acquisition circuit 131 and the signal processing circuit 132 are disposed on the peripheral circuit of the controller, and of course, the signal acquisition circuit 131 and the signal processing circuit 132 may also be integrated in the controller, which is not described in detail herein.
In this embodiment, the first circuit path 121 is designated to represent an ideal resistance value of the thermistor at 25 ℃, the second circuit path 122 is designated to represent an ideal resistance value of the thermistor at 32 ℃, the third circuit path 123 is designated to represent an ideal resistance value of the thermistor at 37 ℃, and the fourth circuit path 124 is designated to represent an ideal resistance value of the thermistor at 45 ℃. Wherein the temperature values specified by the first circuit path 121, the second circuit path 122, the third circuit path 123 and the fourth circuit path 124 are respectively represented by T 01 、T 02 、T 03 And T 04 And (4) showing. The data provided by the thermistor manufacturer can show that: the ideal resistance values of the thermistor at 25 ℃, 32 ℃, 37 ℃ and 45 ℃ are R1=2.252K Ω, R2=1.667K Ω, R3=1.355K Ω and R4=0.984K Ω, respectively, so in practical application, the first circuit channel 121, the second circuit channel 122, the third circuit channel 123 and the fourth circuit channel 124 can be constructed by using precise resistors with corresponding resistance values.
Then, the test signals are sent to the first circuit path 121, the second circuit path 122, the third circuit path 123, and the fourth circuit path 124, and the actual resistance values corresponding to the first circuit path 121, the second circuit path 122, the third circuit path 123, and the fourth circuit path 124 can be determined by amplifying and performing analog-to-digital conversion on the output signals corresponding to the first circuit path 121, the second circuit path 122, the third circuit path 123, and the fourth circuit path 124.
When the first circuit path 121, the second circuit path 122 and the third circuit path are calculatedWhen the actual resistance values of the channel 123 and the fourth circuit channel 124 correspond to each other, the theoretical temperature value T corresponding to the actual resistance values of the first circuit channel 121, the second circuit channel 122, the third circuit channel 123 and the fourth circuit channel 124 can be determined according to the mapping relationship between the thermistor temperature and the resistance 11 、T 12 、T 13 And T 14 (ii) a Then, the theoretical temperature values corresponding to the actual resistance values of the first circuit path 121, the second circuit path 122, the third circuit path 123, and the fourth circuit path 124 are respectively differed from 25 ℃, 32 ℃, 37 ℃, and 45 ℃, so as to obtain the calibration errors corresponding to the first circuit path 121, the second circuit path 122, the third circuit path 123, and the fourth circuit path 124.
Then, the body temperature of the subject is detected by the temperature sensor. If the body temperature of the object to be detected is detected as t 0 =35 ℃ due to t 0 =35 ℃ is just within the temperature range characterized by the second circuit path 122 and the third circuit path 123, then E = k can be used 2 E 2 +k 3 E 3 To the detected temperature t of the object to be detected 0 And =35 ℃ for calibration. Wherein k is 2 ＝(T 03 -t 0 )/(T 03 -T 02 )、k 3 ＝(t 0 -T 02 )/(T 03 -T 02 )，E 2 ＝T 02 -T 12 、E 3 ＝T 03 -T 13 And finally calculating the actual body temperature of the object to be detected as follows: t = t 0 -E。
Obviously, the technical scheme provided by the embodiment can accurately and reliably detect the body temperature value of the object to be detected.
Accordingly, an embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the body temperature detection method as disclosed in the foregoing are implemented.
The computer-readable storage medium provided by the embodiment of the invention has the beneficial effects of the body temperature detection method disclosed in the foregoing.
The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising one of 8230; \8230;" 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
The body temperature detection method, the body temperature detection device, the body temperature detection medium and the body temperature detector are described in detail, specific examples are applied in the description to explain the principle and the implementation mode of the invention, and the description of the examples is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims (10)

1. A body temperature detection method is characterized by being applied to a body temperature detector, and the body temperature detector comprises: the temperature sensor is made of a thermistor and a plurality of circuit channels capable of representing that the thermistor has ideal resistance values at different specified temperatures; the method comprises the following steps:
detecting the body temperature of the object to be detected by using the temperature sensor to obtain a target detection temperature, and determining a first circuit channel corresponding to a first specified temperature and a second circuit channel corresponding to a second specified temperature; the first specified temperature is the maximum temperature which is lower than the target detection temperature in the specified temperatures corresponding to the circuit channels; the second specified temperature is the minimum temperature which is higher than the target detection temperature in the specified temperatures corresponding to the plurality of circuit channels;
sending test signals to the first circuit channel and the second circuit channel respectively to determine actual resistance values of the first circuit channel and the second circuit channel;
and correcting the target detection temperature according to the actual resistance value and the ideal resistance value of the first circuit channel and the second circuit channel so as to obtain the actual body temperature of the object to be detected.
2. The method as claimed in claim 1, wherein the process of sending test signals to the first circuit channel and the second circuit channel to determine the actual resistance values of the first circuit channel and the second circuit channel comprises:
sending the test signal to the first circuit channel, and acquiring a first output signal of the first circuit channel;
and performing power amplification processing on the first output signal, and performing digital-to-analog conversion on the first output signal to obtain an actual resistance value of the first circuit channel.
3. The method for detecting body temperature according to claim 1, wherein the thermistor is an NTC thermistor.
4. The method for detecting the body temperature according to claim 1, wherein the plurality of circuit channels are all constructed by precise resistors.
5. The method for detecting the body temperature according to any one of claims 1 to 4, wherein the step of correcting the target detection temperature according to the actual resistance value and the ideal resistance value of the first circuit channel and the second circuit channel to obtain the actual body temperature of the object to be detected comprises:
correcting the first specified temperature according to the actual resistance value and the ideal resistance value of the first circuit channel to obtain a first correction parameter, and correcting the second specified temperature according to the actual resistance value and the ideal resistance value of the second circuit channel to obtain a second correction parameter;
and correcting the target detection temperature by using the first correction parameter and the second correction parameter to obtain the actual body temperature of the object to be detected.
6. The method as claimed in claim 5, wherein the step of calibrating the first designated temperature according to the actual resistance value and the ideal resistance value of the first circuit channel to obtain a first calibration parameter, and calibrating the second designated temperature according to the actual resistance value and the ideal resistance value of the second circuit channel to obtain a second calibration parameter comprises:
determining the temperature corresponding to the actual resistance value of the first circuit channel according to a preset mapping relation to obtain a first theoretical temperature; the preset mapping relation is a mapping relation between the thermistor and the resistance value at different temperatures;
determining the first correction parameter according to the first theoretical temperature and the actual resistance value and the ideal resistance value of the first circuit channel based on a first model;
determining the temperature corresponding to the actual resistance value of the second circuit channel according to the preset mapping relation to obtain a second theoretical temperature;
determining the second correction parameter according to the second theoretical temperature and the actual resistance value and the ideal resistance value of the second circuit channel based on a second model;
wherein the expression of the first model is:
A 1 ＝E 1 ·(T 2 -t 0 )/(T 2 -T 1 )；
the expression of the second model is:
A 2 ＝E 2 ·(t 0 -T 1 )/(T 2 -T 1 )；
in the formula, A 1 As the first correction parameter, A 2 For the second correction parameter, E 1 Is the difference between the first specified temperature and the first theoretical temperature, E 2 For the difference, T, between said second specified temperature and said second theoretical temperature 1 Is the first specified temperature, T 2 For the second specified temperature, t 0 Detecting a temperature for the target.
7. The method for detecting body temperature according to claim 6, wherein the step of correcting the target detection temperature by using the first correction parameter and the second correction parameter to obtain the actual body temperature of the subject includes:
correcting the target detection temperature by using the first correction parameter and the second correction parameter based on a third model to obtain the actual body temperature of the object to be detected;
wherein the expression of the third model is:
t＝t 0 -A 1 -A 2 ；
wherein t is the actual body temperature t 0 Detecting the temperature for said target, A 1 As the first correction parameter, A 2 The second correction parameter.
8. The utility model provides a body temperature detection device which characterized in that is applied to the body temperature detector, the body temperature detector includes: the temperature sensor is made of a thermistor and a plurality of circuit channels capable of representing that the thermistor has ideal resistance values at different specified temperatures; the device comprises:
the body temperature measuring module is used for detecting the body temperature of the object to be detected by using the temperature sensor to obtain a target detection temperature, and determining a first circuit channel corresponding to a first specified temperature and a second circuit channel corresponding to a second specified temperature; the first specified temperature is the maximum temperature which is lower than the target detection temperature in the specified temperatures corresponding to the circuit channels; the second specified temperature is the minimum temperature which is higher than the target detection temperature in the specified temperatures corresponding to the plurality of circuit channels;
the signal testing module is used for respectively sending testing signals to the first circuit channel and the second circuit channel so as to determine the actual resistance values of the first circuit channel and the second circuit channel;
and the body temperature correction module is used for correcting the target detection temperature according to the actual resistance value and the ideal resistance value of the first circuit channel and the second circuit channel so as to obtain the actual body temperature of the object to be detected.
9. A body temperature monitor, comprising: the temperature sensor is made of a thermistor and a plurality of circuit channels capable of representing that the thermistor has ideal resistance values at different specified temperatures, the temperature sensor and the circuit channels are connected with a controller, and a display screen for displaying body temperature data is arranged on the controller; wherein the controller is configured to perform the steps of:
detecting the body temperature of the object to be detected by using the temperature sensor to obtain a target detection temperature, and determining a first circuit channel corresponding to a first specified temperature and a second circuit channel corresponding to a second specified temperature; the first specified temperature is the maximum temperature which is lower than the target detection temperature in the specified temperatures corresponding to the circuit channels; the second specified temperature is the minimum temperature which is higher than the target detection temperature in the specified temperatures corresponding to the plurality of circuit channels;
sending test signals to the first circuit channel and the second circuit channel respectively to determine actual resistance values of the first circuit channel and the second circuit channel;
and correcting the target detection temperature according to the actual resistance value and the ideal resistance value of the first circuit channel and the second circuit channel so as to obtain the actual body temperature of the object to be detected.
10. A computer-readable storage medium, having stored thereon a computer program which, when being executed by a processor, carries out the steps of a method of body temperature detection according to any one of claims 1 to 7.
CN202211020045.6A 2022-08-24 2022-08-24 Body temperature detection method, device, medium and body temperature detector Pending CN115183899A (en)

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Application Number Priority Date Filing Date Title
CN202211020045.6A CN115183899A (en) 2022-08-24 2022-08-24 Body temperature detection method, device, medium and body temperature detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211020045.6A CN115183899A (en) 2022-08-24 2022-08-24 Body temperature detection method, device, medium and body temperature detector

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CN115183899A true CN115183899A (en) 2022-10-14

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